diff options
Diffstat (limited to 'raylib/src/rtextures.c')
| -rw-r--r-- | raylib/src/rtextures.c | 4833 |
1 files changed, 4833 insertions, 0 deletions
diff --git a/raylib/src/rtextures.c b/raylib/src/rtextures.c new file mode 100644 index 0000000..c4cf190 --- /dev/null +++ b/raylib/src/rtextures.c @@ -0,0 +1,4833 @@ +/********************************************************************************************** +* +* rtextures - Basic functions to load and draw textures +* +* CONFIGURATION: +* +* #define SUPPORT_MODULE_RTEXTURES +* rtextures module is included in the build +* +* #define SUPPORT_FILEFORMAT_BMP +* #define SUPPORT_FILEFORMAT_PNG +* #define SUPPORT_FILEFORMAT_TGA +* #define SUPPORT_FILEFORMAT_JPG +* #define SUPPORT_FILEFORMAT_GIF +* #define SUPPORT_FILEFORMAT_QOI +* #define SUPPORT_FILEFORMAT_PSD +* #define SUPPORT_FILEFORMAT_PIC +* #define SUPPORT_FILEFORMAT_HDR +* #define SUPPORT_FILEFORMAT_DDS +* #define SUPPORT_FILEFORMAT_PKM +* #define SUPPORT_FILEFORMAT_KTX +* #define SUPPORT_FILEFORMAT_PVR +* #define SUPPORT_FILEFORMAT_ASTC +* Select desired fileformats to be supported for image data loading. Some of those formats are +* supported by default, to remove support, just comment unrequired #define in this module +* +* #define SUPPORT_IMAGE_EXPORT +* Support image export in multiple file formats +* +* #define SUPPORT_IMAGE_MANIPULATION +* Support multiple image editing functions to scale, adjust colors, flip, draw on images, crop... +* If not defined only three image editing functions supported: ImageFormat(), ImageAlphaMask(), ImageToPOT() +* +* #define SUPPORT_IMAGE_GENERATION +* Support procedural image generation functionality (gradient, spot, perlin-noise, cellular) +* +* DEPENDENCIES: +* stb_image - Multiple image formats loading (JPEG, PNG, BMP, TGA, PSD, GIF, PIC) +* NOTE: stb_image has been slightly modified to support Android platform. +* stb_image_resize - Multiple image resize algorythms +* +* +* LICENSE: zlib/libpng +* +* Copyright (c) 2013-2022 Ramon Santamaria (@raysan5) +* +* This software is provided "as-is", without any express or implied warranty. In no event +* will the authors be held liable for any damages arising from the use of this software. +* +* Permission is granted to anyone to use this software for any purpose, including commercial +* applications, and to alter it and redistribute it freely, subject to the following restrictions: +* +* 1. The origin of this software must not be misrepresented; you must not claim that you +* wrote the original software. If you use this software in a product, an acknowledgment +* in the product documentation would be appreciated but is not required. +* +* 2. Altered source versions must be plainly marked as such, and must not be misrepresented +* as being the original software. +* +* 3. This notice may not be removed or altered from any source distribution. +* +**********************************************************************************************/ + +#include "raylib.h" // Declares module functions + +// Check if config flags have been externally provided on compilation line +#if !defined(EXTERNAL_CONFIG_FLAGS) + #include "config.h" // Defines module configuration flags +#endif + +#if defined(SUPPORT_MODULE_RTEXTURES) + +#include "utils.h" // Required for: TRACELOG() and fopen() Android mapping +#include "rlgl.h" // OpenGL abstraction layer to OpenGL 1.1, 3.3 or ES2 + +#include <stdlib.h> // Required for: malloc(), free() +#include <string.h> // Required for: strlen() [Used in ImageTextEx()], strcmp() [Used in LoadImageFromMemory()] +#include <math.h> // Required for: fabsf() +#include <stdio.h> // Required for: sprintf() [Used in ExportImageAsCode()] + +// Support only desired texture formats on stb_image +#if !defined(SUPPORT_FILEFORMAT_BMP) + #define STBI_NO_BMP +#endif +#if !defined(SUPPORT_FILEFORMAT_PNG) + #define STBI_NO_PNG +#endif +#if !defined(SUPPORT_FILEFORMAT_TGA) + #define STBI_NO_TGA +#endif +#if !defined(SUPPORT_FILEFORMAT_JPG) + #define STBI_NO_JPEG // Image format .jpg and .jpeg +#endif +#if !defined(SUPPORT_FILEFORMAT_PSD) + #define STBI_NO_PSD +#endif +#if !defined(SUPPORT_FILEFORMAT_GIF) + #define STBI_NO_GIF +#endif +#if !defined(SUPPORT_FILEFORMAT_PIC) + #define STBI_NO_PIC +#endif +#if !defined(SUPPORT_FILEFORMAT_HDR) + #define STBI_NO_HDR +#endif + +// Image fileformats not supported by default +#define STBI_NO_PIC +#define STBI_NO_PNM // Image format .ppm and .pgm + +#if defined(__TINYC__) + #define STBI_NO_SIMD +#endif + +#if (defined(SUPPORT_FILEFORMAT_BMP) || \ + defined(SUPPORT_FILEFORMAT_PNG) || \ + defined(SUPPORT_FILEFORMAT_TGA) || \ + defined(SUPPORT_FILEFORMAT_JPG) || \ + defined(SUPPORT_FILEFORMAT_PSD) || \ + defined(SUPPORT_FILEFORMAT_GIF) || \ + defined(SUPPORT_FILEFORMAT_PIC) || \ + defined(SUPPORT_FILEFORMAT_HDR)) + + #define STBI_MALLOC RL_MALLOC + #define STBI_FREE RL_FREE + #define STBI_REALLOC RL_REALLOC + + #define STB_IMAGE_IMPLEMENTATION + #include "external/stb_image.h" // Required for: stbi_load_from_file() + // NOTE: Used to read image data (multiple formats support) +#endif + +#if defined(SUPPORT_FILEFORMAT_QOI) + #define QOI_MALLOC RL_MALLOC + #define QOI_FREE RL_FREE + + #define QOI_IMPLEMENTATION + #include "external/qoi.h" +#endif + +#if defined(SUPPORT_IMAGE_EXPORT) + #define STBIW_MALLOC RL_MALLOC + #define STBIW_FREE RL_FREE + #define STBIW_REALLOC RL_REALLOC + + #define STB_IMAGE_WRITE_IMPLEMENTATION + #include "external/stb_image_write.h" // Required for: stbi_write_*() +#endif + +#if defined(SUPPORT_IMAGE_MANIPULATION) + #define STBIR_MALLOC(size,c) ((void)(c), RL_MALLOC(size)) + #define STBIR_FREE(ptr,c) ((void)(c), RL_FREE(ptr)) + + #define STB_IMAGE_RESIZE_IMPLEMENTATION + #include "external/stb_image_resize.h" // Required for: stbir_resize_uint8() [ImageResize()] +#endif + +//---------------------------------------------------------------------------------- +// Defines and Macros +//---------------------------------------------------------------------------------- +#ifndef PIXELFORMAT_UNCOMPRESSED_R5G5B5A1_ALPHA_THRESHOLD + #define PIXELFORMAT_UNCOMPRESSED_R5G5B5A1_ALPHA_THRESHOLD 50 // Threshold over 255 to set alpha as 0 +#endif + +//---------------------------------------------------------------------------------- +// Types and Structures Definition +//---------------------------------------------------------------------------------- +// ... + +//---------------------------------------------------------------------------------- +// Global Variables Definition +//---------------------------------------------------------------------------------- +// It's lonely here... + +//---------------------------------------------------------------------------------- +// Other Modules Functions Declaration (required by text) +//---------------------------------------------------------------------------------- +// ... + +//---------------------------------------------------------------------------------- +// Module specific Functions Declaration +//---------------------------------------------------------------------------------- +#if defined(SUPPORT_FILEFORMAT_DDS) +static Image LoadDDS(const unsigned char *fileData, unsigned int fileSize); // Load DDS file data +#endif +#if defined(SUPPORT_FILEFORMAT_PKM) +static Image LoadPKM(const unsigned char *fileData, unsigned int fileSize); // Load PKM file data +#endif +#if defined(SUPPORT_FILEFORMAT_KTX) +static Image LoadKTX(const unsigned char *fileData, unsigned int fileSize); // Load KTX file data +static int SaveKTX(Image image, const char *fileName); // Save image data as KTX file +#endif +#if defined(SUPPORT_FILEFORMAT_PVR) +static Image LoadPVR(const unsigned char *fileData, unsigned int fileSize); // Load PVR file data +#endif +#if defined(SUPPORT_FILEFORMAT_ASTC) +static Image LoadASTC(const unsigned char *fileData, unsigned int fileSize); // Load ASTC file data +#endif + +static Vector4 *LoadImageDataNormalized(Image image); // Load pixel data from image as Vector4 array (float normalized) + +//---------------------------------------------------------------------------------- +// Module Functions Definition +//---------------------------------------------------------------------------------- + +// Load image from file into CPU memory (RAM) +Image LoadImage(const char *fileName) +{ + Image image = { 0 }; + +#if defined(SUPPORT_FILEFORMAT_PNG) || \ + defined(SUPPORT_FILEFORMAT_BMP) || \ + defined(SUPPORT_FILEFORMAT_TGA) || \ + defined(SUPPORT_FILEFORMAT_JPG) || \ + defined(SUPPORT_FILEFORMAT_GIF) || \ + defined(SUPPORT_FILEFORMAT_PIC) || \ + defined(SUPPORT_FILEFORMAT_HDR) || \ + defined(SUPPORT_FILEFORMAT_PSD) + + #define STBI_REQUIRED +#endif + + // Loading file to memory + unsigned int fileSize = 0; + unsigned char *fileData = LoadFileData(fileName, &fileSize); + + // Loading image from memory data + if (fileData != NULL) image = LoadImageFromMemory(GetFileExtension(fileName), fileData, fileSize); + + RL_FREE(fileData); + + return image; +} + +// Load an image from RAW file data +Image LoadImageRaw(const char *fileName, int width, int height, int format, int headerSize) +{ + Image image = { 0 }; + + unsigned int dataSize = 0; + unsigned char *fileData = LoadFileData(fileName, &dataSize); + + if (fileData != NULL) + { + unsigned char *dataPtr = fileData; + unsigned int size = GetPixelDataSize(width, height, format); + + if (headerSize > 0) dataPtr += headerSize; + + image.data = RL_MALLOC(size); // Allocate required memory in bytes + memcpy(image.data, dataPtr, size); // Copy required data to image + image.width = width; + image.height = height; + image.mipmaps = 1; + image.format = format; + + RL_FREE(fileData); + } + + return image; +} + +// Load animated image data +// - Image.data buffer includes all frames: [image#0][image#1][image#2][...] +// - Number of frames is returned through 'frames' parameter +// - All frames are returned in RGBA format +// - Frames delay data is discarded +Image LoadImageAnim(const char *fileName, int *frames) +{ + Image image = { 0 }; + int frameCount = 1; + +#if defined(SUPPORT_FILEFORMAT_GIF) + if (IsFileExtension(fileName, ".gif")) + { + unsigned int dataSize = 0; + unsigned char *fileData = LoadFileData(fileName, &dataSize); + + if (fileData != NULL) + { + int comp = 0; + int *delays = NULL; + image.data = stbi_load_gif_from_memory(fileData, dataSize, &delays, &image.width, &image.height, &frameCount, &comp, 4); + + image.mipmaps = 1; + image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + RL_FREE(fileData); + RL_FREE(delays); // NOTE: Frames delays are discarded + } + } +#else + if (false) { } +#endif + else image = LoadImage(fileName); + + // TODO: Support APNG animated images + + *frames = frameCount; + return image; +} + +// Load image from memory buffer, fileType refers to extension: i.e. ".png" +// WARNING: File extension must be provided in lower-case +Image LoadImageFromMemory(const char *fileType, const unsigned char *fileData, int dataSize) +{ + Image image = { 0 }; + +#if defined(SUPPORT_FILEFORMAT_PNG) + if ((strcmp(fileType, ".png") == 0) +#else + if ((false) +#endif +#if defined(SUPPORT_FILEFORMAT_BMP) + || (strcmp(fileType, ".bmp") == 0) +#endif +#if defined(SUPPORT_FILEFORMAT_TGA) + || (strcmp(fileType, ".tga") == 0) +#endif +#if defined(SUPPORT_FILEFORMAT_JPG) + || ((strcmp(fileType, ".jpg") == 0) || (strcmp(fileType, ".jpeg") == 0)) +#endif +#if defined(SUPPORT_FILEFORMAT_GIF) + || (strcmp(fileType, ".gif") == 0) +#endif +#if defined(SUPPORT_FILEFORMAT_PIC) + || (strcmp(fileType, ".pic") == 0) +#endif +#if defined(SUPPORT_FILEFORMAT_PSD) + || (strcmp(fileType, ".psd") == 0) +#endif + ) + { +#if defined(STBI_REQUIRED) + // NOTE: Using stb_image to load images (Supports multiple image formats) + + if (fileData != NULL) + { + int comp = 0; + image.data = stbi_load_from_memory(fileData, dataSize, &image.width, &image.height, &comp, 0); + + if (image.data != NULL) + { + image.mipmaps = 1; + + if (comp == 1) image.format = PIXELFORMAT_UNCOMPRESSED_GRAYSCALE; + else if (comp == 2) image.format = PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA; + else if (comp == 3) image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8; + else if (comp == 4) image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + } + } +#endif + } +#if defined(SUPPORT_FILEFORMAT_HDR) + else if (strcmp(fileType, ".hdr") == 0) + { +#if defined(STBI_REQUIRED) + if (fileData != NULL) + { + int comp = 0; + image.data = stbi_loadf_from_memory(fileData, dataSize, &image.width, &image.height, &comp, 0); + + image.mipmaps = 1; + + if (comp == 1) image.format = PIXELFORMAT_UNCOMPRESSED_R32; + else if (comp == 3) image.format = PIXELFORMAT_UNCOMPRESSED_R32G32B32; + else if (comp == 4) image.format = PIXELFORMAT_UNCOMPRESSED_R32G32B32A32; + else + { + TRACELOG(LOG_WARNING, "IMAGE: HDR file format not supported"); + UnloadImage(image); + } + } +#endif + } +#endif +#if defined(SUPPORT_FILEFORMAT_QOI) + else if (strcmp(fileType, ".qoi") == 0) + { + qoi_desc desc = { 0 }; + image.data = qoi_decode(fileData, dataSize, &desc, 4); + image.width = desc.width; + image.height = desc.height; + image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + image.mipmaps = 1; + } +#endif +#if defined(SUPPORT_FILEFORMAT_DDS) + else if (strcmp(fileType, ".dds") == 0) image = LoadDDS(fileData, dataSize); +#endif +#if defined(SUPPORT_FILEFORMAT_PKM) + else if (strcmp(fileType, ".pkm") == 0) image = LoadPKM(fileData, dataSize); +#endif +#if defined(SUPPORT_FILEFORMAT_KTX) + else if (strcmp(fileType, ".ktx") == 0) image = LoadKTX(fileData, dataSize); +#endif +#if defined(SUPPORT_FILEFORMAT_PVR) + else if (strcmp(fileType, ".pvr") == 0) image = LoadPVR(fileData, dataSize); +#endif +#if defined(SUPPORT_FILEFORMAT_ASTC) + else if (strcmp(fileType, ".astc") == 0) image = LoadASTC(fileData, dataSize); +#endif + else TRACELOG(LOG_WARNING, "IMAGE: Data format not supported"); + + if (image.data != NULL) TRACELOG(LOG_INFO, "IMAGE: Data loaded successfully (%ix%i | %s | %i mipmaps)", image.width, image.height, rlGetPixelFormatName(image.format), image.mipmaps); + else TRACELOG(LOG_WARNING, "IMAGE: Failed to load image data"); + + return image; +} + +// Load image from GPU texture data +// NOTE: Compressed texture formats not supported +Image LoadImageFromTexture(Texture2D texture) +{ + Image image = { 0 }; + + if (texture.format < PIXELFORMAT_COMPRESSED_DXT1_RGB) + { + image.data = rlReadTexturePixels(texture.id, texture.width, texture.height, texture.format); + + if (image.data != NULL) + { + image.width = texture.width; + image.height = texture.height; + image.format = texture.format; + image.mipmaps = 1; + +#if defined(GRAPHICS_API_OPENGL_ES2) + // NOTE: Data retrieved on OpenGL ES 2.0 should be RGBA, + // coming from FBO color buffer attachment, but it seems + // original texture format is retrieved on RPI... + image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; +#endif + TRACELOG(LOG_INFO, "TEXTURE: [ID %i] Pixel data retrieved successfully", texture.id); + } + else TRACELOG(LOG_WARNING, "TEXTURE: [ID %i] Failed to retrieve pixel data", texture.id); + } + else TRACELOG(LOG_WARNING, "TEXTURE: [ID %i] Failed to retrieve compressed pixel data", texture.id); + + return image; +} + +// Load image from screen buffer and (screenshot) +Image LoadImageFromScreen(void) +{ + Image image = { 0 }; + + image.width = GetScreenWidth(); + image.height = GetScreenHeight(); + image.mipmaps = 1; + image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + image.data = rlReadScreenPixels(image.width, image.height); + + return image; +} + +// Unload image from CPU memory (RAM) +void UnloadImage(Image image) +{ + RL_FREE(image.data); +} + +// Export image data to file +// NOTE: File format depends on fileName extension +bool ExportImage(Image image, const char *fileName) +{ + int success = 0; + +#if defined(SUPPORT_IMAGE_EXPORT) + int channels = 4; + bool allocatedData = false; + unsigned char *imgData = (unsigned char *)image.data; + + if (image.format == PIXELFORMAT_UNCOMPRESSED_GRAYSCALE) channels = 1; + else if (image.format == PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA) channels = 2; + else if (image.format == PIXELFORMAT_UNCOMPRESSED_R8G8B8) channels = 3; + else if (image.format == PIXELFORMAT_UNCOMPRESSED_R8G8B8A8) channels = 4; + else + { + // NOTE: Getting Color array as RGBA unsigned char values + imgData = (unsigned char *)LoadImageColors(image); + allocatedData = true; + } + +#if defined(SUPPORT_FILEFORMAT_PNG) + if (IsFileExtension(fileName, ".png")) + { + int dataSize = 0; + unsigned char *fileData = stbi_write_png_to_mem((const unsigned char *)imgData, image.width*channels, image.width, image.height, channels, &dataSize); + success = SaveFileData(fileName, fileData, dataSize); + RL_FREE(fileData); + } +#else + if (false) { } +#endif +#if defined(SUPPORT_FILEFORMAT_BMP) + else if (IsFileExtension(fileName, ".bmp")) success = stbi_write_bmp(fileName, image.width, image.height, channels, imgData); +#endif +#if defined(SUPPORT_FILEFORMAT_TGA) + else if (IsFileExtension(fileName, ".tga")) success = stbi_write_tga(fileName, image.width, image.height, channels, imgData); +#endif +#if defined(SUPPORT_FILEFORMAT_JPG) + else if (IsFileExtension(fileName, ".jpg") || + IsFileExtension(fileName, ".jpeg")) success = stbi_write_jpg(fileName, image.width, image.height, channels, imgData, 90); // JPG quality: between 1 and 100 +#endif +#if defined(SUPPORT_FILEFORMAT_QOI) + else if (IsFileExtension(fileName, ".qoi")) + { + channels = 0; + if (image.format == PIXELFORMAT_UNCOMPRESSED_R8G8B8) channels = 3; + else if (image.format == PIXELFORMAT_UNCOMPRESSED_R8G8B8A8) channels = 4; + else TRACELOG(LOG_WARNING, "IMAGE: Image pixel format must be R8G8B8 or R8G8B8A8"); + + if ((channels == 3) || (channels == 4)) + { + qoi_desc desc = { 0 }; + desc.width = image.width; + desc.height = image.height; + desc.channels = channels; + desc.colorspace = QOI_SRGB; + + success = qoi_write(fileName, imgData, &desc); + } + } +#endif +#if defined(SUPPORT_FILEFORMAT_KTX) + else if (IsFileExtension(fileName, ".ktx")) success = SaveKTX(image, fileName); +#endif + else if (IsFileExtension(fileName, ".raw")) + { + // Export raw pixel data (without header) + // NOTE: It's up to the user to track image parameters + success = SaveFileData(fileName, image.data, GetPixelDataSize(image.width, image.height, image.format)); + } + + if (allocatedData) RL_FREE(imgData); +#endif // SUPPORT_IMAGE_EXPORT + + if (success != 0) TRACELOG(LOG_INFO, "FILEIO: [%s] Image exported successfully", fileName); + else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to export image", fileName); + + return success; +} + +// Export image as code file (.h) defining an array of bytes +bool ExportImageAsCode(Image image, const char *fileName) +{ + bool success = false; + +#if defined(SUPPORT_IMAGE_EXPORT) + +#ifndef TEXT_BYTES_PER_LINE + #define TEXT_BYTES_PER_LINE 20 +#endif + + int dataSize = GetPixelDataSize(image.width, image.height, image.format); + + // NOTE: Text data buffer size is estimated considering image data size in bytes + // and requiring 6 char bytes for every byte: "0x00, " + char *txtData = (char *)RL_CALLOC(dataSize*6 + 2000, sizeof(char)); + + int byteCount = 0; + byteCount += sprintf(txtData + byteCount, "////////////////////////////////////////////////////////////////////////////////////////\n"); + byteCount += sprintf(txtData + byteCount, "// //\n"); + byteCount += sprintf(txtData + byteCount, "// ImageAsCode exporter v1.0 - Image pixel data exported as an array of bytes //\n"); + byteCount += sprintf(txtData + byteCount, "// //\n"); + byteCount += sprintf(txtData + byteCount, "// more info and bugs-report: github.com/raysan5/raylib //\n"); + byteCount += sprintf(txtData + byteCount, "// feedback and support: ray[at]raylib.com //\n"); + byteCount += sprintf(txtData + byteCount, "// //\n"); + byteCount += sprintf(txtData + byteCount, "// Copyright (c) 2018-2022 Ramon Santamaria (@raysan5) //\n"); + byteCount += sprintf(txtData + byteCount, "// //\n"); + byteCount += sprintf(txtData + byteCount, "////////////////////////////////////////////////////////////////////////////////////////\n\n"); + + // Get file name from path and convert variable name to uppercase + char varFileName[256] = { 0 }; + strcpy(varFileName, GetFileNameWithoutExt(fileName)); + for (int i = 0; varFileName[i] != '\0'; i++) if ((varFileName[i] >= 'a') && (varFileName[i] <= 'z')) { varFileName[i] = varFileName[i] - 32; } + + // Add image information + byteCount += sprintf(txtData + byteCount, "// Image data information\n"); + byteCount += sprintf(txtData + byteCount, "#define %s_WIDTH %i\n", varFileName, image.width); + byteCount += sprintf(txtData + byteCount, "#define %s_HEIGHT %i\n", varFileName, image.height); + byteCount += sprintf(txtData + byteCount, "#define %s_FORMAT %i // raylib internal pixel format\n\n", varFileName, image.format); + + byteCount += sprintf(txtData + byteCount, "static unsigned char %s_DATA[%i] = { ", varFileName, dataSize); + for (int i = 0; i < dataSize - 1; i++) byteCount += sprintf(txtData + byteCount, ((i%TEXT_BYTES_PER_LINE == 0)? "0x%x,\n" : "0x%x, "), ((unsigned char *)image.data)[i]); + byteCount += sprintf(txtData + byteCount, "0x%x };\n", ((unsigned char *)image.data)[dataSize - 1]); + + // NOTE: Text data size exported is determined by '\0' (NULL) character + success = SaveFileText(fileName, txtData); + + RL_FREE(txtData); + +#endif // SUPPORT_IMAGE_EXPORT + + if (success != 0) TRACELOG(LOG_INFO, "FILEIO: [%s] Image as code exported successfully", fileName); + else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to export image as code", fileName); + + return success; +} + +//------------------------------------------------------------------------------------ +// Image generation functions +//------------------------------------------------------------------------------------ +// Generate image: plain color +Image GenImageColor(int width, int height, Color color) +{ + Color *pixels = (Color *)RL_CALLOC(width*height, sizeof(Color)); + + for (int i = 0; i < width*height; i++) pixels[i] = color; + + Image image = { + .data = pixels, + .width = width, + .height = height, + .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, + .mipmaps = 1 + }; + + return image; +} + +#if defined(SUPPORT_IMAGE_GENERATION) +// Generate image: vertical gradient +Image GenImageGradientV(int width, int height, Color top, Color bottom) +{ + Color *pixels = (Color *)RL_MALLOC(width*height*sizeof(Color)); + + for (int j = 0; j < height; j++) + { + float factor = (float)j/(float)height; + for (int i = 0; i < width; i++) + { + pixels[j*width + i].r = (int)((float)bottom.r*factor + (float)top.r*(1.f - factor)); + pixels[j*width + i].g = (int)((float)bottom.g*factor + (float)top.g*(1.f - factor)); + pixels[j*width + i].b = (int)((float)bottom.b*factor + (float)top.b*(1.f - factor)); + pixels[j*width + i].a = (int)((float)bottom.a*factor + (float)top.a*(1.f - factor)); + } + } + + Image image = { + .data = pixels, + .width = width, + .height = height, + .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, + .mipmaps = 1 + }; + + return image; +} + +// Generate image: horizontal gradient +Image GenImageGradientH(int width, int height, Color left, Color right) +{ + Color *pixels = (Color *)RL_MALLOC(width*height*sizeof(Color)); + + for (int i = 0; i < width; i++) + { + float factor = (float)i/(float)width; + for (int j = 0; j < height; j++) + { + pixels[j*width + i].r = (int)((float)right.r*factor + (float)left.r*(1.f - factor)); + pixels[j*width + i].g = (int)((float)right.g*factor + (float)left.g*(1.f - factor)); + pixels[j*width + i].b = (int)((float)right.b*factor + (float)left.b*(1.f - factor)); + pixels[j*width + i].a = (int)((float)right.a*factor + (float)left.a*(1.f - factor)); + } + } + + Image image = { + .data = pixels, + .width = width, + .height = height, + .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, + .mipmaps = 1 + }; + + return image; +} + +// Generate image: radial gradient +Image GenImageGradientRadial(int width, int height, float density, Color inner, Color outer) +{ + Color *pixels = (Color *)RL_MALLOC(width*height*sizeof(Color)); + float radius = (width < height)? (float)width/2.0f : (float)height/2.0f; + + float centerX = (float)width/2.0f; + float centerY = (float)height/2.0f; + + for (int y = 0; y < height; y++) + { + for (int x = 0; x < width; x++) + { + float dist = hypotf((float)x - centerX, (float)y - centerY); + float factor = (dist - radius*density)/(radius*(1.0f - density)); + + factor = (float)fmax(factor, 0.0f); + factor = (float)fmin(factor, 1.f); // dist can be bigger than radius so we have to check + + pixels[y*width + x].r = (int)((float)outer.r*factor + (float)inner.r*(1.0f - factor)); + pixels[y*width + x].g = (int)((float)outer.g*factor + (float)inner.g*(1.0f - factor)); + pixels[y*width + x].b = (int)((float)outer.b*factor + (float)inner.b*(1.0f - factor)); + pixels[y*width + x].a = (int)((float)outer.a*factor + (float)inner.a*(1.0f - factor)); + } + } + + Image image = { + .data = pixels, + .width = width, + .height = height, + .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, + .mipmaps = 1 + }; + + return image; +} + +// Generate image: checked +Image GenImageChecked(int width, int height, int checksX, int checksY, Color col1, Color col2) +{ + Color *pixels = (Color *)RL_MALLOC(width*height*sizeof(Color)); + + for (int y = 0; y < height; y++) + { + for (int x = 0; x < width; x++) + { + if ((x/checksX + y/checksY)%2 == 0) pixels[y*width + x] = col1; + else pixels[y*width + x] = col2; + } + } + + Image image = { + .data = pixels, + .width = width, + .height = height, + .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, + .mipmaps = 1 + }; + + return image; +} + +// Generate image: white noise +Image GenImageWhiteNoise(int width, int height, float factor) +{ + Color *pixels = (Color *)RL_MALLOC(width*height*sizeof(Color)); + + for (int i = 0; i < width*height; i++) + { + if (GetRandomValue(0, 99) < (int)(factor*100.0f)) pixels[i] = WHITE; + else pixels[i] = BLACK; + } + + Image image = { + .data = pixels, + .width = width, + .height = height, + .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, + .mipmaps = 1 + }; + + return image; +} + +// Generate image: cellular algorithm. Bigger tileSize means bigger cells +Image GenImageCellular(int width, int height, int tileSize) +{ + Color *pixels = (Color *)RL_MALLOC(width*height*sizeof(Color)); + + int seedsPerRow = width/tileSize; + int seedsPerCol = height/tileSize; + int seedCount = seedsPerRow*seedsPerCol; + + Vector2 *seeds = (Vector2 *)RL_MALLOC(seedCount*sizeof(Vector2)); + + for (int i = 0; i < seedCount; i++) + { + int y = (i/seedsPerRow)*tileSize + GetRandomValue(0, tileSize - 1); + int x = (i%seedsPerRow)*tileSize + GetRandomValue(0, tileSize - 1); + seeds[i] = (Vector2){ (float)x, (float)y }; + } + + for (int y = 0; y < height; y++) + { + int tileY = y/tileSize; + + for (int x = 0; x < width; x++) + { + int tileX = x/tileSize; + + float minDistance = 65536.0f; //(float)strtod("Inf", NULL); + + // Check all adjacent tiles + for (int i = -1; i < 2; i++) + { + if ((tileX + i < 0) || (tileX + i >= seedsPerRow)) continue; + + for (int j = -1; j < 2; j++) + { + if ((tileY + j < 0) || (tileY + j >= seedsPerCol)) continue; + + Vector2 neighborSeed = seeds[(tileY + j)*seedsPerRow + tileX + i]; + + float dist = (float)hypot(x - (int)neighborSeed.x, y - (int)neighborSeed.y); + minDistance = (float)fmin(minDistance, dist); + } + } + + // I made this up but it seems to give good results at all tile sizes + int intensity = (int)(minDistance*256.0f/tileSize); + if (intensity > 255) intensity = 255; + + pixels[y*width + x] = (Color){ intensity, intensity, intensity, 255 }; + } + } + + RL_FREE(seeds); + + Image image = { + .data = pixels, + .width = width, + .height = height, + .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, + .mipmaps = 1 + }; + + return image; +} +#endif // SUPPORT_IMAGE_GENERATION + +//------------------------------------------------------------------------------------ +// Image manipulation functions +//------------------------------------------------------------------------------------ +// Copy an image to a new image +Image ImageCopy(Image image) +{ + Image newImage = { 0 }; + + int width = image.width; + int height = image.height; + int size = 0; + + for (int i = 0; i < image.mipmaps; i++) + { + size += GetPixelDataSize(width, height, image.format); + + width /= 2; + height /= 2; + + // Security check for NPOT textures + if (width < 1) width = 1; + if (height < 1) height = 1; + } + + newImage.data = RL_MALLOC(size); + + if (newImage.data != NULL) + { + // NOTE: Size must be provided in bytes + memcpy(newImage.data, image.data, size); + + newImage.width = image.width; + newImage.height = image.height; + newImage.mipmaps = image.mipmaps; + newImage.format = image.format; + } + + return newImage; +} + +// Create an image from another image piece +Image ImageFromImage(Image image, Rectangle rec) +{ + Image result = { 0 }; + + int bytesPerPixel = GetPixelDataSize(1, 1, image.format); + + result.width = (int)rec.width; + result.height = (int)rec.height; + result.data = RL_CALLOC((int)(rec.width*rec.height)*bytesPerPixel, 1); + result.format = image.format; + result.mipmaps = 1; + + for (int y = 0; y < rec.height; y++) + { + memcpy(((unsigned char *)result.data) + y*(int)rec.width*bytesPerPixel, ((unsigned char *)image.data) + ((y + (int)rec.y)*image.width + (int)rec.x)*bytesPerPixel, (int)rec.width*bytesPerPixel); + } + + return result; +} + +// Crop an image to area defined by a rectangle +// NOTE: Security checks are performed in case rectangle goes out of bounds +void ImageCrop(Image *image, Rectangle crop) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + // Security checks to validate crop rectangle + if (crop.x < 0) { crop.width += crop.x; crop.x = 0; } + if (crop.y < 0) { crop.height += crop.y; crop.y = 0; } + if ((crop.x + crop.width) > image->width) crop.width = image->width - crop.x; + if ((crop.y + crop.height) > image->height) crop.height = image->height - crop.y; + if ((crop.x > image->width) || (crop.y > image->height)) + { + TRACELOG(LOG_WARNING, "IMAGE: Failed to crop, rectangle out of bounds"); + return; + } + + if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level"); + if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats"); + else + { + int bytesPerPixel = GetPixelDataSize(1, 1, image->format); + + unsigned char *croppedData = (unsigned char *)RL_MALLOC((int)(crop.width*crop.height)*bytesPerPixel); + + // OPTION 1: Move cropped data line-by-line + for (int y = (int)crop.y, offsetSize = 0; y < (int)(crop.y + crop.height); y++) + { + memcpy(croppedData + offsetSize, ((unsigned char *)image->data) + (y*image->width + (int)crop.x)*bytesPerPixel, (int)crop.width*bytesPerPixel); + offsetSize += ((int)crop.width*bytesPerPixel); + } + + /* + // OPTION 2: Move cropped data pixel-by-pixel or byte-by-byte + for (int y = (int)crop.y; y < (int)(crop.y + crop.height); y++) + { + for (int x = (int)crop.x; x < (int)(crop.x + crop.width); x++) + { + //memcpy(croppedData + ((y - (int)crop.y)*(int)crop.width + (x - (int)crop.x))*bytesPerPixel, ((unsigned char *)image->data) + (y*image->width + x)*bytesPerPixel, bytesPerPixel); + for (int i = 0; i < bytesPerPixel; i++) croppedData[((y - (int)crop.y)*(int)crop.width + (x - (int)crop.x))*bytesPerPixel + i] = ((unsigned char *)image->data)[(y*image->width + x)*bytesPerPixel + i]; + } + } + */ + + RL_FREE(image->data); + image->data = croppedData; + image->width = (int)crop.width; + image->height = (int)crop.height; + } +} + +// Convert image data to desired format +void ImageFormat(Image *image, int newFormat) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if ((newFormat != 0) && (image->format != newFormat)) + { + if ((image->format < PIXELFORMAT_COMPRESSED_DXT1_RGB) && (newFormat < PIXELFORMAT_COMPRESSED_DXT1_RGB)) + { + Vector4 *pixels = LoadImageDataNormalized(*image); // Supports 8 to 32 bit per channel + + RL_FREE(image->data); // WARNING! We loose mipmaps data --> Regenerated at the end... + image->data = NULL; + image->format = newFormat; + + int k = 0; + + switch (image->format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: + { + image->data = (unsigned char *)RL_MALLOC(image->width*image->height*sizeof(unsigned char)); + + for (int i = 0; i < image->width*image->height; i++) + { + ((unsigned char *)image->data)[i] = (unsigned char)((pixels[i].x*0.299f + pixels[i].y*0.587f + pixels[i].z*0.114f)*255.0f); + } + + } break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + { + image->data = (unsigned char *)RL_MALLOC(image->width*image->height*2*sizeof(unsigned char)); + + for (int i = 0; i < image->width*image->height*2; i += 2, k++) + { + ((unsigned char *)image->data)[i] = (unsigned char)((pixels[k].x*0.299f + (float)pixels[k].y*0.587f + (float)pixels[k].z*0.114f)*255.0f); + ((unsigned char *)image->data)[i + 1] = (unsigned char)(pixels[k].w*255.0f); + } + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + { + image->data = (unsigned short *)RL_MALLOC(image->width*image->height*sizeof(unsigned short)); + + unsigned char r = 0; + unsigned char g = 0; + unsigned char b = 0; + + for (int i = 0; i < image->width*image->height; i++) + { + r = (unsigned char)(round(pixels[i].x*31.0f)); + g = (unsigned char)(round(pixels[i].y*63.0f)); + b = (unsigned char)(round(pixels[i].z*31.0f)); + + ((unsigned short *)image->data)[i] = (unsigned short)r << 11 | (unsigned short)g << 5 | (unsigned short)b; + } + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: + { + image->data = (unsigned char *)RL_MALLOC(image->width*image->height*3*sizeof(unsigned char)); + + for (int i = 0, k = 0; i < image->width*image->height*3; i += 3, k++) + { + ((unsigned char *)image->data)[i] = (unsigned char)(pixels[k].x*255.0f); + ((unsigned char *)image->data)[i + 1] = (unsigned char)(pixels[k].y*255.0f); + ((unsigned char *)image->data)[i + 2] = (unsigned char)(pixels[k].z*255.0f); + } + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + image->data = (unsigned short *)RL_MALLOC(image->width*image->height*sizeof(unsigned short)); + + unsigned char r = 0; + unsigned char g = 0; + unsigned char b = 0; + unsigned char a = 0; + + for (int i = 0; i < image->width*image->height; i++) + { + r = (unsigned char)(round(pixels[i].x*31.0f)); + g = (unsigned char)(round(pixels[i].y*31.0f)); + b = (unsigned char)(round(pixels[i].z*31.0f)); + a = (pixels[i].w > ((float)PIXELFORMAT_UNCOMPRESSED_R5G5B5A1_ALPHA_THRESHOLD/255.0f))? 1 : 0; + + ((unsigned short *)image->data)[i] = (unsigned short)r << 11 | (unsigned short)g << 6 | (unsigned short)b << 1 | (unsigned short)a; + } + + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + image->data = (unsigned short *)RL_MALLOC(image->width*image->height*sizeof(unsigned short)); + + unsigned char r = 0; + unsigned char g = 0; + unsigned char b = 0; + unsigned char a = 0; + + for (int i = 0; i < image->width*image->height; i++) + { + r = (unsigned char)(round(pixels[i].x*15.0f)); + g = (unsigned char)(round(pixels[i].y*15.0f)); + b = (unsigned char)(round(pixels[i].z*15.0f)); + a = (unsigned char)(round(pixels[i].w*15.0f)); + + ((unsigned short *)image->data)[i] = (unsigned short)r << 12 | (unsigned short)g << 8 | (unsigned short)b << 4 | (unsigned short)a; + } + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: + { + image->data = (unsigned char *)RL_MALLOC(image->width*image->height*4*sizeof(unsigned char)); + + for (int i = 0, k = 0; i < image->width*image->height*4; i += 4, k++) + { + ((unsigned char *)image->data)[i] = (unsigned char)(pixels[k].x*255.0f); + ((unsigned char *)image->data)[i + 1] = (unsigned char)(pixels[k].y*255.0f); + ((unsigned char *)image->data)[i + 2] = (unsigned char)(pixels[k].z*255.0f); + ((unsigned char *)image->data)[i + 3] = (unsigned char)(pixels[k].w*255.0f); + } + } break; + case PIXELFORMAT_UNCOMPRESSED_R32: + { + // WARNING: Image is converted to GRAYSCALE eqeuivalent 32bit + + image->data = (float *)RL_MALLOC(image->width*image->height*sizeof(float)); + + for (int i = 0; i < image->width*image->height; i++) + { + ((float *)image->data)[i] = (float)(pixels[i].x*0.299f + pixels[i].y*0.587f + pixels[i].z*0.114f); + } + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32: + { + image->data = (float *)RL_MALLOC(image->width*image->height*3*sizeof(float)); + + for (int i = 0, k = 0; i < image->width*image->height*3; i += 3, k++) + { + ((float *)image->data)[i] = pixels[k].x; + ((float *)image->data)[i + 1] = pixels[k].y; + ((float *)image->data)[i + 2] = pixels[k].z; + } + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: + { + image->data = (float *)RL_MALLOC(image->width*image->height*4*sizeof(float)); + + for (int i = 0, k = 0; i < image->width*image->height*4; i += 4, k++) + { + ((float *)image->data)[i] = pixels[k].x; + ((float *)image->data)[i + 1] = pixels[k].y; + ((float *)image->data)[i + 2] = pixels[k].z; + ((float *)image->data)[i + 3] = pixels[k].w; + } + } break; + default: break; + } + + RL_FREE(pixels); + pixels = NULL; + + // In case original image had mipmaps, generate mipmaps for formated image + // NOTE: Original mipmaps are replaced by new ones, if custom mipmaps were used, they are lost + if (image->mipmaps > 1) + { + image->mipmaps = 1; + #if defined(SUPPORT_IMAGE_MANIPULATION) + if (image->data != NULL) ImageMipmaps(image); + #endif + } + } + else TRACELOG(LOG_WARNING, "IMAGE: Data format is compressed, can not be converted"); + } +} + +// Convert image to POT (power-of-two) +// NOTE: It could be useful on OpenGL ES 2.0 (RPI, HTML5) +void ImageToPOT(Image *image, Color fill) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + // Calculate next power-of-two values + // NOTE: Just add the required amount of pixels at the right and bottom sides of image... + int potWidth = (int)powf(2, ceilf(logf((float)image->width)/logf(2))); + int potHeight = (int)powf(2, ceilf(logf((float)image->height)/logf(2))); + + // Check if POT texture generation is required (if texture is not already POT) + if ((potWidth != image->width) || (potHeight != image->height)) ImageResizeCanvas(image, potWidth, potHeight, 0, 0, fill); +} + +#if defined(SUPPORT_IMAGE_MANIPULATION) +// Create an image from text (default font) +Image ImageText(const char *text, int fontSize, Color color) +{ + Image imText = { 0 }; +#if defined(SUPPORT_MODULE_RTEXT) + int defaultFontSize = 10; // Default Font chars height in pixel + if (fontSize < defaultFontSize) fontSize = defaultFontSize; + int spacing = fontSize/defaultFontSize; + imText = ImageTextEx(GetFontDefault(), text, (float)fontSize, (float)spacing, color); // WARNING: Module required: rtext +#else + imText = GenImageColor(200, 60, BLACK); // Generating placeholder black image rectangle + TRACELOG(LOG_WARNING, "IMAGE: ImageTextEx() requires module: rtext"); +#endif + return imText; +} + +// Create an image from text (custom sprite font) +Image ImageTextEx(Font font, const char *text, float fontSize, float spacing, Color tint) +{ + Image imText = { 0 }; +#if defined(SUPPORT_MODULE_RTEXT) + int size = (int)strlen(text); // Get size in bytes of text + + int textOffsetX = 0; // Image drawing position X + int textOffsetY = 0; // Offset between lines (on line break '\n') + + // NOTE: Text image is generated at font base size, later scaled to desired font size + Vector2 imSize = MeasureTextEx(font, text, (float)font.baseSize, spacing); // WARNING: Module required: rtext + + // Create image to store text + imText = GenImageColor((int)imSize.x, (int)imSize.y, BLANK); + + for (int i = 0; i < size; i++) + { + // Get next codepoint from byte string and glyph index in font + int codepointByteCount = 0; + int codepoint = GetCodepoint(&text[i], &codepointByteCount); // WARNING: Module required: rtext + int index = GetGlyphIndex(font, codepoint); // WARNING: Module required: rtext + + // NOTE: Normally we exit the decoding sequence as soon as a bad byte is found (and return 0x3f) + // but we need to draw all of the bad bytes using the '?' symbol moving one byte + if (codepoint == 0x3f) codepointByteCount = 1; + + if (codepoint == '\n') + { + // NOTE: Fixed line spacing of 1.5 line-height + // TODO: Support custom line spacing defined by user + textOffsetY += (font.baseSize + font.baseSize/2); + textOffsetX = 0; + } + else + { + if ((codepoint != ' ') && (codepoint != '\t')) + { + Rectangle rec = { (float)(textOffsetX + font.glyphs[index].offsetX), (float)(textOffsetY + font.glyphs[index].offsetY), (float)font.recs[index].width, (float)font.recs[index].height }; + ImageDraw(&imText, font.glyphs[index].image, (Rectangle){ 0, 0, (float)font.glyphs[index].image.width, (float)font.glyphs[index].image.height }, rec, tint); + } + + if (font.glyphs[index].advanceX == 0) textOffsetX += (int)(font.recs[index].width + spacing); + else textOffsetX += font.glyphs[index].advanceX + (int)spacing; + } + + i += (codepointByteCount - 1); // Move text bytes counter to next codepoint + } + + // Scale image depending on text size + if (fontSize > imSize.y) + { + float scaleFactor = fontSize/imSize.y; + TRACELOG(LOG_INFO, "IMAGE: Text scaled by factor: %f", scaleFactor); + + // Using nearest-neighbor scaling algorithm for default font + // WARNING: Module required: rtext + if (font.texture.id == GetFontDefault().texture.id) ImageResizeNN(&imText, (int)(imSize.x*scaleFactor), (int)(imSize.y*scaleFactor)); + else ImageResize(&imText, (int)(imSize.x*scaleFactor), (int)(imSize.y*scaleFactor)); + } +#else + imText = GenImageColor(200, 60, BLACK); // Generating placeholder black image rectangle + TRACELOG(LOG_WARNING, "IMAGE: ImageTextEx() requires module: rtext"); +#endif + return imText; +} + +// Crop image depending on alpha value +// NOTE: Threshold is defined as a percentatge: 0.0f -> 1.0f +void ImageAlphaCrop(Image *image, float threshold) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + Rectangle crop = GetImageAlphaBorder(*image, threshold); + + // Crop if rectangle is valid + if (((int)crop.width != 0) && ((int)crop.height != 0)) ImageCrop(image, crop); +} + +// Clear alpha channel to desired color +// NOTE: Threshold defines the alpha limit, 0.0f to 1.0f +void ImageAlphaClear(Image *image, Color color, float threshold) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level"); + if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats"); + else + { + switch (image->format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + { + unsigned char thresholdValue = (unsigned char)(threshold*255.0f); + for (int i = 1; i < image->width*image->height*2; i += 2) + { + if (((unsigned char *)image->data)[i] <= thresholdValue) + { + ((unsigned char *)image->data)[i - 1] = color.r; + ((unsigned char *)image->data)[i] = color.a; + } + } + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + unsigned char thresholdValue = ((threshold < 0.5f)? 0 : 1); + + unsigned char r = (unsigned char)(round((float)color.r*31.0f)); + unsigned char g = (unsigned char)(round((float)color.g*31.0f)); + unsigned char b = (unsigned char)(round((float)color.b*31.0f)); + unsigned char a = (color.a < 128)? 0 : 1; + + for (int i = 0; i < image->width*image->height; i++) + { + if ((((unsigned short *)image->data)[i] & 0b0000000000000001) <= thresholdValue) + { + ((unsigned short *)image->data)[i] = (unsigned short)r << 11 | (unsigned short)g << 6 | (unsigned short)b << 1 | (unsigned short)a; + } + } + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + unsigned char thresholdValue = (unsigned char)(threshold*15.0f); + + unsigned char r = (unsigned char)(round((float)color.r*15.0f)); + unsigned char g = (unsigned char)(round((float)color.g*15.0f)); + unsigned char b = (unsigned char)(round((float)color.b*15.0f)); + unsigned char a = (unsigned char)(round((float)color.a*15.0f)); + + for (int i = 0; i < image->width*image->height; i++) + { + if ((((unsigned short *)image->data)[i] & 0x000f) <= thresholdValue) + { + ((unsigned short *)image->data)[i] = (unsigned short)r << 12 | (unsigned short)g << 8 | (unsigned short)b << 4 | (unsigned short)a; + } + } + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: + { + unsigned char thresholdValue = (unsigned char)(threshold*255.0f); + for (int i = 3; i < image->width*image->height*4; i += 4) + { + if (((unsigned char *)image->data)[i] <= thresholdValue) + { + ((unsigned char *)image->data)[i - 3] = color.r; + ((unsigned char *)image->data)[i - 2] = color.g; + ((unsigned char *)image->data)[i - 1] = color.b; + ((unsigned char *)image->data)[i] = color.a; + } + } + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: + { + for (int i = 3; i < image->width*image->height*4; i += 4) + { + if (((float *)image->data)[i] <= threshold) + { + ((float *)image->data)[i - 3] = (float)color.r/255.0f; + ((float *)image->data)[i - 2] = (float)color.g/255.0f; + ((float *)image->data)[i - 1] = (float)color.b/255.0f; + ((float *)image->data)[i] = (float)color.a/255.0f; + } + } + } break; + default: break; + } + } +} + +// Apply alpha mask to image +// NOTE 1: Returned image is GRAY_ALPHA (16bit) or RGBA (32bit) +// NOTE 2: alphaMask should be same size as image +void ImageAlphaMask(Image *image, Image alphaMask) +{ + if ((image->width != alphaMask.width) || (image->height != alphaMask.height)) + { + TRACELOG(LOG_WARNING, "IMAGE: Alpha mask must be same size as image"); + } + else if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) + { + TRACELOG(LOG_WARNING, "IMAGE: Alpha mask can not be applied to compressed data formats"); + } + else + { + // Force mask to be Grayscale + Image mask = ImageCopy(alphaMask); + if (mask.format != PIXELFORMAT_UNCOMPRESSED_GRAYSCALE) ImageFormat(&mask, PIXELFORMAT_UNCOMPRESSED_GRAYSCALE); + + // In case image is only grayscale, we just add alpha channel + if (image->format == PIXELFORMAT_UNCOMPRESSED_GRAYSCALE) + { + unsigned char *data = (unsigned char *)RL_MALLOC(image->width*image->height*2); + + // Apply alpha mask to alpha channel + for (int i = 0, k = 0; (i < mask.width*mask.height) || (i < image->width*image->height); i++, k += 2) + { + data[k] = ((unsigned char *)image->data)[i]; + data[k + 1] = ((unsigned char *)mask.data)[i]; + } + + RL_FREE(image->data); + image->data = data; + image->format = PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA; + } + else + { + // Convert image to RGBA + if (image->format != PIXELFORMAT_UNCOMPRESSED_R8G8B8A8) ImageFormat(image, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8); + + // Apply alpha mask to alpha channel + for (int i = 0, k = 3; (i < mask.width*mask.height) || (i < image->width*image->height); i++, k += 4) + { + ((unsigned char *)image->data)[k] = ((unsigned char *)mask.data)[i]; + } + } + + UnloadImage(mask); + } +} + +// Premultiply alpha channel +void ImageAlphaPremultiply(Image *image) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + float alpha = 0.0f; + Color *pixels = LoadImageColors(*image); + + for (int i = 0; i < image->width*image->height; i++) + { + if (pixels[i].a == 0) + { + pixels[i].r = 0; + pixels[i].g = 0; + pixels[i].b = 0; + } + else if (pixels[i].a < 255) + { + alpha = (float)pixels[i].a/255.0f; + pixels[i].r = (unsigned char)((float)pixels[i].r*alpha); + pixels[i].g = (unsigned char)((float)pixels[i].g*alpha); + pixels[i].b = (unsigned char)((float)pixels[i].b*alpha); + } + } + + RL_FREE(image->data); + + int format = image->format; + image->data = pixels; + image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + ImageFormat(image, format); +} + +// Resize and image to new size +// NOTE: Uses stb default scaling filters (both bicubic): +// STBIR_DEFAULT_FILTER_UPSAMPLE STBIR_FILTER_CATMULLROM +// STBIR_DEFAULT_FILTER_DOWNSAMPLE STBIR_FILTER_MITCHELL (high-quality Catmull-Rom) +void ImageResize(Image *image, int newWidth, int newHeight) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + bool fastPath = true; + if ((image->format != PIXELFORMAT_UNCOMPRESSED_GRAYSCALE) && (image->format != PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA) && (image->format != PIXELFORMAT_UNCOMPRESSED_R8G8B8) && (image->format != PIXELFORMAT_UNCOMPRESSED_R8G8B8A8)) fastPath = true; + + if (fastPath) + { + int bytesPerPixel = GetPixelDataSize(1, 1, image->format); + unsigned char *output = (unsigned char *)RL_MALLOC(newWidth*newHeight*bytesPerPixel); + + switch (image->format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: stbir_resize_uint8((unsigned char *)image->data, image->width, image->height, 0, output, newWidth, newHeight, 0, 1); break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: stbir_resize_uint8((unsigned char *)image->data, image->width, image->height, 0, output, newWidth, newHeight, 0, 2); break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: stbir_resize_uint8((unsigned char *)image->data, image->width, image->height, 0, output, newWidth, newHeight, 0, 3); break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: stbir_resize_uint8((unsigned char *)image->data, image->width, image->height, 0, output, newWidth, newHeight, 0, 4); break; + default: break; + } + + RL_FREE(image->data); + image->data = output; + image->width = newWidth; + image->height = newHeight; + } + else + { + // Get data as Color pixels array to work with it + Color *pixels = LoadImageColors(*image); + Color *output = (Color *)RL_MALLOC(newWidth*newHeight*sizeof(Color)); + + // NOTE: Color data is casted to (unsigned char *), there shouldn't been any problem... + stbir_resize_uint8((unsigned char *)pixels, image->width, image->height, 0, (unsigned char *)output, newWidth, newHeight, 0, 4); + + int format = image->format; + + UnloadImageColors(pixels); + RL_FREE(image->data); + + image->data = output; + image->width = newWidth; + image->height = newHeight; + image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + ImageFormat(image, format); // Reformat 32bit RGBA image to original format + } +} + +// Resize and image to new size using Nearest-Neighbor scaling algorithm +void ImageResizeNN(Image *image,int newWidth,int newHeight) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + Color *pixels = LoadImageColors(*image); + Color *output = (Color *)RL_MALLOC(newWidth*newHeight*sizeof(Color)); + + // EDIT: added +1 to account for an early rounding problem + int xRatio = (int)((image->width << 16)/newWidth) + 1; + int yRatio = (int)((image->height << 16)/newHeight) + 1; + + int x2, y2; + for (int y = 0; y < newHeight; y++) + { + for (int x = 0; x < newWidth; x++) + { + x2 = ((x*xRatio) >> 16); + y2 = ((y*yRatio) >> 16); + + output[(y*newWidth) + x] = pixels[(y2*image->width) + x2] ; + } + } + + int format = image->format; + + RL_FREE(image->data); + + image->data = output; + image->width = newWidth; + image->height = newHeight; + image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + ImageFormat(image, format); // Reformat 32bit RGBA image to original format + + UnloadImageColors(pixels); +} + +// Resize canvas and fill with color +// NOTE: Resize offset is relative to the top-left corner of the original image +void ImageResizeCanvas(Image *image, int newWidth, int newHeight, int offsetX, int offsetY, Color fill) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level"); + if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats"); + else if ((newWidth != image->width) || (newHeight != image->height)) + { + Rectangle srcRec = { 0, 0, (float)image->width, (float)image->height }; + Vector2 dstPos = { (float)offsetX, (float)offsetY }; + + if (offsetX < 0) + { + srcRec.x = (float)-offsetX; + srcRec.width += (float)offsetX; + dstPos.x = 0; + } + else if ((offsetX + image->width) > newWidth) srcRec.width = (float)(newWidth - offsetX); + + if (offsetY < 0) + { + srcRec.y = (float)-offsetY; + srcRec.height += (float)offsetY; + dstPos.y = 0; + } + else if ((offsetY + image->height) > newHeight) srcRec.height = (float)(newHeight - offsetY); + + if (newWidth < srcRec.width) srcRec.width = (float)newWidth; + if (newHeight < srcRec.height) srcRec.height = (float)newHeight; + + int bytesPerPixel = GetPixelDataSize(1, 1, image->format); + unsigned char *resizedData = (unsigned char *)RL_CALLOC(newWidth*newHeight*bytesPerPixel, 1); + + // TODO: Fill resized canvas with fill color (must be formatted to image->format) + + int dstOffsetSize = ((int)dstPos.y*newWidth + (int)dstPos.x)*bytesPerPixel; + + for (int y = 0; y < (int)srcRec.height; y++) + { + memcpy(resizedData + dstOffsetSize, ((unsigned char *)image->data) + ((y + (int)srcRec.y)*image->width + (int)srcRec.x)*bytesPerPixel, (int)srcRec.width*bytesPerPixel); + dstOffsetSize += (newWidth*bytesPerPixel); + } + + RL_FREE(image->data); + image->data = resizedData; + image->width = newWidth; + image->height = newHeight; + } +} + +// Generate all mipmap levels for a provided image +// NOTE 1: Supports POT and NPOT images +// NOTE 2: image.data is scaled to include mipmap levels +// NOTE 3: Mipmaps format is the same as base image +void ImageMipmaps(Image *image) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + int mipCount = 1; // Required mipmap levels count (including base level) + int mipWidth = image->width; // Base image width + int mipHeight = image->height; // Base image height + int mipSize = GetPixelDataSize(mipWidth, mipHeight, image->format); // Image data size (in bytes) + + // Count mipmap levels required + while ((mipWidth != 1) || (mipHeight != 1)) + { + if (mipWidth != 1) mipWidth /= 2; + if (mipHeight != 1) mipHeight /= 2; + + // Security check for NPOT textures + if (mipWidth < 1) mipWidth = 1; + if (mipHeight < 1) mipHeight = 1; + + TRACELOGD("IMAGE: Next mipmap level: %i x %i - current size %i", mipWidth, mipHeight, mipSize); + + mipCount++; + mipSize += GetPixelDataSize(mipWidth, mipHeight, image->format); // Add mipmap size (in bytes) + } + + if (image->mipmaps < mipCount) + { + void *temp = RL_REALLOC(image->data, mipSize); + + if (temp != NULL) image->data = temp; // Assign new pointer (new size) to store mipmaps data + else TRACELOG(LOG_WARNING, "IMAGE: Mipmaps required memory could not be allocated"); + + // Pointer to allocated memory point where store next mipmap level data + unsigned char *nextmip = (unsigned char *)image->data + GetPixelDataSize(image->width, image->height, image->format); + + mipWidth = image->width/2; + mipHeight = image->height/2; + mipSize = GetPixelDataSize(mipWidth, mipHeight, image->format); + Image imCopy = ImageCopy(*image); + + for (int i = 1; i < mipCount; i++) + { + TRACELOGD("IMAGE: Generating mipmap level: %i (%i x %i) - size: %i - offset: 0x%x", i, mipWidth, mipHeight, mipSize, nextmip); + + ImageResize(&imCopy, mipWidth, mipHeight); // Uses internally Mitchell cubic downscale filter + + memcpy(nextmip, imCopy.data, mipSize); + nextmip += mipSize; + image->mipmaps++; + + mipWidth /= 2; + mipHeight /= 2; + + // Security check for NPOT textures + if (mipWidth < 1) mipWidth = 1; + if (mipHeight < 1) mipHeight = 1; + + mipSize = GetPixelDataSize(mipWidth, mipHeight, image->format); + } + + UnloadImage(imCopy); + } + else TRACELOG(LOG_WARNING, "IMAGE: Mipmaps already available"); +} + +// Dither image data to 16bpp or lower (Floyd-Steinberg dithering) +// NOTE: In case selected bpp do not represent an known 16bit format, +// dithered data is stored in the LSB part of the unsigned short +void ImageDither(Image *image, int rBpp, int gBpp, int bBpp, int aBpp) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) + { + TRACELOG(LOG_WARNING, "IMAGE: Compressed data formats can not be dithered"); + return; + } + + if ((rBpp + gBpp + bBpp + aBpp) > 16) + { + TRACELOG(LOG_WARNING, "IMAGE: Unsupported dithering bpps (%ibpp), only 16bpp or lower modes supported", (rBpp+gBpp+bBpp+aBpp)); + } + else + { + Color *pixels = LoadImageColors(*image); + + RL_FREE(image->data); // free old image data + + if ((image->format != PIXELFORMAT_UNCOMPRESSED_R8G8B8) && (image->format != PIXELFORMAT_UNCOMPRESSED_R8G8B8A8)) + { + TRACELOG(LOG_WARNING, "IMAGE: Format is already 16bpp or lower, dithering could have no effect"); + } + + // Define new image format, check if desired bpp match internal known format + if ((rBpp == 5) && (gBpp == 6) && (bBpp == 5) && (aBpp == 0)) image->format = PIXELFORMAT_UNCOMPRESSED_R5G6B5; + else if ((rBpp == 5) && (gBpp == 5) && (bBpp == 5) && (aBpp == 1)) image->format = PIXELFORMAT_UNCOMPRESSED_R5G5B5A1; + else if ((rBpp == 4) && (gBpp == 4) && (bBpp == 4) && (aBpp == 4)) image->format = PIXELFORMAT_UNCOMPRESSED_R4G4B4A4; + else + { + image->format = 0; + TRACELOG(LOG_WARNING, "IMAGE: Unsupported dithered OpenGL internal format: %ibpp (R%iG%iB%iA%i)", (rBpp+gBpp+bBpp+aBpp), rBpp, gBpp, bBpp, aBpp); + } + + // NOTE: We will store the dithered data as unsigned short (16bpp) + image->data = (unsigned short *)RL_MALLOC(image->width*image->height*sizeof(unsigned short)); + + Color oldPixel = WHITE; + Color newPixel = WHITE; + + int rError, gError, bError; + unsigned short rPixel, gPixel, bPixel, aPixel; // Used for 16bit pixel composition + + #define MIN(a,b) (((a)<(b))?(a):(b)) + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + oldPixel = pixels[y*image->width + x]; + + // NOTE: New pixel obtained by bits truncate, it would be better to round values (check ImageFormat()) + newPixel.r = oldPixel.r >> (8 - rBpp); // R bits + newPixel.g = oldPixel.g >> (8 - gBpp); // G bits + newPixel.b = oldPixel.b >> (8 - bBpp); // B bits + newPixel.a = oldPixel.a >> (8 - aBpp); // A bits (not used on dithering) + + // NOTE: Error must be computed between new and old pixel but using same number of bits! + // We want to know how much color precision we have lost... + rError = (int)oldPixel.r - (int)(newPixel.r << (8 - rBpp)); + gError = (int)oldPixel.g - (int)(newPixel.g << (8 - gBpp)); + bError = (int)oldPixel.b - (int)(newPixel.b << (8 - bBpp)); + + pixels[y*image->width + x] = newPixel; + + // NOTE: Some cases are out of the array and should be ignored + if (x < (image->width - 1)) + { + pixels[y*image->width + x+1].r = MIN((int)pixels[y*image->width + x+1].r + (int)((float)rError*7.0f/16), 0xff); + pixels[y*image->width + x+1].g = MIN((int)pixels[y*image->width + x+1].g + (int)((float)gError*7.0f/16), 0xff); + pixels[y*image->width + x+1].b = MIN((int)pixels[y*image->width + x+1].b + (int)((float)bError*7.0f/16), 0xff); + } + + if ((x > 0) && (y < (image->height - 1))) + { + pixels[(y+1)*image->width + x-1].r = MIN((int)pixels[(y+1)*image->width + x-1].r + (int)((float)rError*3.0f/16), 0xff); + pixels[(y+1)*image->width + x-1].g = MIN((int)pixels[(y+1)*image->width + x-1].g + (int)((float)gError*3.0f/16), 0xff); + pixels[(y+1)*image->width + x-1].b = MIN((int)pixels[(y+1)*image->width + x-1].b + (int)((float)bError*3.0f/16), 0xff); + } + + if (y < (image->height - 1)) + { + pixels[(y+1)*image->width + x].r = MIN((int)pixels[(y+1)*image->width + x].r + (int)((float)rError*5.0f/16), 0xff); + pixels[(y+1)*image->width + x].g = MIN((int)pixels[(y+1)*image->width + x].g + (int)((float)gError*5.0f/16), 0xff); + pixels[(y+1)*image->width + x].b = MIN((int)pixels[(y+1)*image->width + x].b + (int)((float)bError*5.0f/16), 0xff); + } + + if ((x < (image->width - 1)) && (y < (image->height - 1))) + { + pixels[(y+1)*image->width + x+1].r = MIN((int)pixels[(y+1)*image->width + x+1].r + (int)((float)rError*1.0f/16), 0xff); + pixels[(y+1)*image->width + x+1].g = MIN((int)pixels[(y+1)*image->width + x+1].g + (int)((float)gError*1.0f/16), 0xff); + pixels[(y+1)*image->width + x+1].b = MIN((int)pixels[(y+1)*image->width + x+1].b + (int)((float)bError*1.0f/16), 0xff); + } + + rPixel = (unsigned short)newPixel.r; + gPixel = (unsigned short)newPixel.g; + bPixel = (unsigned short)newPixel.b; + aPixel = (unsigned short)newPixel.a; + + ((unsigned short *)image->data)[y*image->width + x] = (rPixel << (gBpp + bBpp + aBpp)) | (gPixel << (bBpp + aBpp)) | (bPixel << aBpp) | aPixel; + } + } + + UnloadImageColors(pixels); + } +} + +// Flip image vertically +void ImageFlipVertical(Image *image) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level"); + if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats"); + else + { + int bytesPerPixel = GetPixelDataSize(1, 1, image->format); + unsigned char *flippedData = (unsigned char *)RL_MALLOC(image->width*image->height*bytesPerPixel); + + for (int i = (image->height - 1), offsetSize = 0; i >= 0; i--) + { + memcpy(flippedData + offsetSize, ((unsigned char *)image->data) + i*image->width*bytesPerPixel, image->width*bytesPerPixel); + offsetSize += image->width*bytesPerPixel; + } + + RL_FREE(image->data); + image->data = flippedData; + } +} + +// Flip image horizontally +void ImageFlipHorizontal(Image *image) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level"); + if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats"); + else + { + int bytesPerPixel = GetPixelDataSize(1, 1, image->format); + unsigned char *flippedData = (unsigned char *)RL_MALLOC(image->width*image->height*bytesPerPixel); + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + // OPTION 1: Move pixels with memcopy() + //memcpy(flippedData + (y*image->width + x)*bytesPerPixel, ((unsigned char *)image->data) + (y*image->width + (image->width - 1 - x))*bytesPerPixel, bytesPerPixel); + + // OPTION 2: Just copy data pixel by pixel + for (int i = 0; i < bytesPerPixel; i++) flippedData[(y*image->width + x)*bytesPerPixel + i] = ((unsigned char *)image->data)[(y*image->width + (image->width - 1 - x))*bytesPerPixel + i]; + } + } + + RL_FREE(image->data); + image->data = flippedData; + + /* + // OPTION 3: Faster implementation (specific for 32bit pixels) + // NOTE: It does not require additional allocations + uint32_t *ptr = (uint32_t *)image->data; + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width/2; x++) + { + uint32_t backup = ptr[y*image->width + x]; + ptr[y*image->width + x] = ptr[y*image->width + (image->width - 1 - x)]; + ptr[y*image->width + (image->width - 1 - x)] = backup; + } + } + */ + } +} + +// Rotate image clockwise 90deg +void ImageRotateCW(Image *image) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level"); + if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats"); + else + { + int bytesPerPixel = GetPixelDataSize(1, 1, image->format); + unsigned char *rotatedData = (unsigned char *)RL_MALLOC(image->width*image->height*bytesPerPixel); + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + //memcpy(rotatedData + (x*image->height + (image->height - y - 1))*bytesPerPixel, ((unsigned char *)image->data) + (y*image->width + x)*bytesPerPixel, bytesPerPixel); + for (int i = 0; i < bytesPerPixel; i++) rotatedData[(x*image->height + (image->height - y - 1))*bytesPerPixel + i] = ((unsigned char *)image->data)[(y*image->width + x)*bytesPerPixel + i]; + } + } + + RL_FREE(image->data); + image->data = rotatedData; + int width = image->width; + int height = image-> height; + + image->width = height; + image->height = width; + } +} + +// Rotate image counter-clockwise 90deg +void ImageRotateCCW(Image *image) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level"); + if (image->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats"); + else + { + int bytesPerPixel = GetPixelDataSize(1, 1, image->format); + unsigned char *rotatedData = (unsigned char *)RL_MALLOC(image->width*image->height*bytesPerPixel); + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + //memcpy(rotatedData + (x*image->height + y))*bytesPerPixel, ((unsigned char *)image->data) + (y*image->width + (image->width - x - 1))*bytesPerPixel, bytesPerPixel); + for (int i = 0; i < bytesPerPixel; i++) rotatedData[(x*image->height + y)*bytesPerPixel + i] = ((unsigned char *)image->data)[(y*image->width + (image->width - x - 1))*bytesPerPixel + i]; + } + } + + RL_FREE(image->data); + image->data = rotatedData; + int width = image->width; + int height = image-> height; + + image->width = height; + image->height = width; + } +} + +// Modify image color: tint +void ImageColorTint(Image *image, Color color) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + Color *pixels = LoadImageColors(*image); + + float cR = (float)color.r/255; + float cG = (float)color.g/255; + float cB = (float)color.b/255; + float cA = (float)color.a/255; + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + int index = y*image->width + x; + unsigned char r = (unsigned char)(((float)pixels[index].r/255*cR)*255.0f); + unsigned char g = (unsigned char)(((float)pixels[index].g/255*cG)*255.0f); + unsigned char b = (unsigned char)(((float)pixels[index].b/255*cB)*255.0f); + unsigned char a = (unsigned char)(((float)pixels[index].a/255*cA)*255.0f); + + pixels[y*image->width + x].r = r; + pixels[y*image->width + x].g = g; + pixels[y*image->width + x].b = b; + pixels[y*image->width + x].a = a; + } + } + + int format = image->format; + RL_FREE(image->data); + + image->data = pixels; + image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + ImageFormat(image, format); +} + +// Modify image color: invert +void ImageColorInvert(Image *image) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + Color *pixels = LoadImageColors(*image); + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + pixels[y*image->width + x].r = 255 - pixels[y*image->width + x].r; + pixels[y*image->width + x].g = 255 - pixels[y*image->width + x].g; + pixels[y*image->width + x].b = 255 - pixels[y*image->width + x].b; + } + } + + int format = image->format; + RL_FREE(image->data); + + image->data = pixels; + image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + ImageFormat(image, format); +} + +// Modify image color: grayscale +void ImageColorGrayscale(Image *image) +{ + ImageFormat(image, PIXELFORMAT_UNCOMPRESSED_GRAYSCALE); +} + +// Modify image color: contrast +// NOTE: Contrast values between -100 and 100 +void ImageColorContrast(Image *image, float contrast) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (contrast < -100) contrast = -100; + if (contrast > 100) contrast = 100; + + contrast = (100.0f + contrast)/100.0f; + contrast *= contrast; + + Color *pixels = LoadImageColors(*image); + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + float pR = (float)pixels[y*image->width + x].r/255.0f; + pR -= 0.5; + pR *= contrast; + pR += 0.5; + pR *= 255; + if (pR < 0) pR = 0; + if (pR > 255) pR = 255; + + float pG = (float)pixels[y*image->width + x].g/255.0f; + pG -= 0.5; + pG *= contrast; + pG += 0.5; + pG *= 255; + if (pG < 0) pG = 0; + if (pG > 255) pG = 255; + + float pB = (float)pixels[y*image->width + x].b/255.0f; + pB -= 0.5; + pB *= contrast; + pB += 0.5; + pB *= 255; + if (pB < 0) pB = 0; + if (pB > 255) pB = 255; + + pixels[y*image->width + x].r = (unsigned char)pR; + pixels[y*image->width + x].g = (unsigned char)pG; + pixels[y*image->width + x].b = (unsigned char)pB; + } + } + + int format = image->format; + RL_FREE(image->data); + + image->data = pixels; + image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + ImageFormat(image, format); +} + +// Modify image color: brightness +// NOTE: Brightness values between -255 and 255 +void ImageColorBrightness(Image *image, int brightness) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + if (brightness < -255) brightness = -255; + if (brightness > 255) brightness = 255; + + Color *pixels = LoadImageColors(*image); + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + int cR = pixels[y*image->width + x].r + brightness; + int cG = pixels[y*image->width + x].g + brightness; + int cB = pixels[y*image->width + x].b + brightness; + + if (cR < 0) cR = 1; + if (cR > 255) cR = 255; + + if (cG < 0) cG = 1; + if (cG > 255) cG = 255; + + if (cB < 0) cB = 1; + if (cB > 255) cB = 255; + + pixels[y*image->width + x].r = (unsigned char)cR; + pixels[y*image->width + x].g = (unsigned char)cG; + pixels[y*image->width + x].b = (unsigned char)cB; + } + } + + int format = image->format; + RL_FREE(image->data); + + image->data = pixels; + image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + ImageFormat(image, format); +} + +// Modify image color: replace color +void ImageColorReplace(Image *image, Color color, Color replace) +{ + // Security check to avoid program crash + if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; + + Color *pixels = LoadImageColors(*image); + + for (int y = 0; y < image->height; y++) + { + for (int x = 0; x < image->width; x++) + { + if ((pixels[y*image->width + x].r == color.r) && + (pixels[y*image->width + x].g == color.g) && + (pixels[y*image->width + x].b == color.b) && + (pixels[y*image->width + x].a == color.a)) + { + pixels[y*image->width + x].r = replace.r; + pixels[y*image->width + x].g = replace.g; + pixels[y*image->width + x].b = replace.b; + pixels[y*image->width + x].a = replace.a; + } + } + } + + int format = image->format; + RL_FREE(image->data); + + image->data = pixels; + image->format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + + ImageFormat(image, format); +} +#endif // SUPPORT_IMAGE_MANIPULATION + +// Load color data from image as a Color array (RGBA - 32bit) +// NOTE: Memory allocated should be freed using UnloadImageColors(); +Color *LoadImageColors(Image image) +{ + if ((image.width == 0) || (image.height == 0)) return NULL; + + Color *pixels = (Color *)RL_MALLOC(image.width*image.height*sizeof(Color)); + + if (image.format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "IMAGE: Pixel data retrieval not supported for compressed image formats"); + else + { + if ((image.format == PIXELFORMAT_UNCOMPRESSED_R32) || + (image.format == PIXELFORMAT_UNCOMPRESSED_R32G32B32) || + (image.format == PIXELFORMAT_UNCOMPRESSED_R32G32B32A32)) TRACELOG(LOG_WARNING, "IMAGE: Pixel format converted from 32bit to 8bit per channel"); + + for (int i = 0, k = 0; i < image.width*image.height; i++) + { + switch (image.format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: + { + pixels[i].r = ((unsigned char *)image.data)[i]; + pixels[i].g = ((unsigned char *)image.data)[i]; + pixels[i].b = ((unsigned char *)image.data)[i]; + pixels[i].a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + { + pixels[i].r = ((unsigned char *)image.data)[k]; + pixels[i].g = ((unsigned char *)image.data)[k]; + pixels[i].b = ((unsigned char *)image.data)[k]; + pixels[i].a = ((unsigned char *)image.data)[k + 1]; + + k += 2; + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + unsigned short pixel = ((unsigned short *)image.data)[i]; + + pixels[i].r = (unsigned char)((float)((pixel & 0b1111100000000000) >> 11)*(255/31)); + pixels[i].g = (unsigned char)((float)((pixel & 0b0000011111000000) >> 6)*(255/31)); + pixels[i].b = (unsigned char)((float)((pixel & 0b0000000000111110) >> 1)*(255/31)); + pixels[i].a = (unsigned char)((pixel & 0b0000000000000001)*255); + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + { + unsigned short pixel = ((unsigned short *)image.data)[i]; + + pixels[i].r = (unsigned char)((float)((pixel & 0b1111100000000000) >> 11)*(255/31)); + pixels[i].g = (unsigned char)((float)((pixel & 0b0000011111100000) >> 5)*(255/63)); + pixels[i].b = (unsigned char)((float)(pixel & 0b0000000000011111)*(255/31)); + pixels[i].a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + unsigned short pixel = ((unsigned short *)image.data)[i]; + + pixels[i].r = (unsigned char)((float)((pixel & 0b1111000000000000) >> 12)*(255/15)); + pixels[i].g = (unsigned char)((float)((pixel & 0b0000111100000000) >> 8)*(255/15)); + pixels[i].b = (unsigned char)((float)((pixel & 0b0000000011110000) >> 4)*(255/15)); + pixels[i].a = (unsigned char)((float)(pixel & 0b0000000000001111)*(255/15)); + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: + { + pixels[i].r = ((unsigned char *)image.data)[k]; + pixels[i].g = ((unsigned char *)image.data)[k + 1]; + pixels[i].b = ((unsigned char *)image.data)[k + 2]; + pixels[i].a = ((unsigned char *)image.data)[k + 3]; + + k += 4; + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: + { + pixels[i].r = (unsigned char)((unsigned char *)image.data)[k]; + pixels[i].g = (unsigned char)((unsigned char *)image.data)[k + 1]; + pixels[i].b = (unsigned char)((unsigned char *)image.data)[k + 2]; + pixels[i].a = 255; + + k += 3; + } break; + case PIXELFORMAT_UNCOMPRESSED_R32: + { + pixels[i].r = (unsigned char)(((float *)image.data)[k]*255.0f); + pixels[i].g = 0; + pixels[i].b = 0; + pixels[i].a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32: + { + pixels[i].r = (unsigned char)(((float *)image.data)[k]*255.0f); + pixels[i].g = (unsigned char)(((float *)image.data)[k + 1]*255.0f); + pixels[i].b = (unsigned char)(((float *)image.data)[k + 2]*255.0f); + pixels[i].a = 255; + + k += 3; + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: + { + pixels[i].r = (unsigned char)(((float *)image.data)[k]*255.0f); + pixels[i].g = (unsigned char)(((float *)image.data)[k]*255.0f); + pixels[i].b = (unsigned char)(((float *)image.data)[k]*255.0f); + pixels[i].a = (unsigned char)(((float *)image.data)[k]*255.0f); + + k += 4; + } break; + default: break; + } + } + } + + return pixels; +} + +// Load colors palette from image as a Color array (RGBA - 32bit) +// NOTE: Memory allocated should be freed using UnloadImagePalette() +Color *LoadImagePalette(Image image, int maxPaletteSize, int *colorCount) +{ + #define COLOR_EQUAL(col1, col2) ((col1.r == col2.r)&&(col1.g == col2.g)&&(col1.b == col2.b)&&(col1.a == col2.a)) + + int palCount = 0; + Color *palette = NULL; + Color *pixels = LoadImageColors(image); + + if (pixels != NULL) + { + palette = (Color *)RL_MALLOC(maxPaletteSize*sizeof(Color)); + + for (int i = 0; i < maxPaletteSize; i++) palette[i] = BLANK; // Set all colors to BLANK + + for (int i = 0; i < image.width*image.height; i++) + { + if (pixels[i].a > 0) + { + bool colorInPalette = false; + + // Check if the color is already on palette + for (int j = 0; j < maxPaletteSize; j++) + { + if (COLOR_EQUAL(pixels[i], palette[j])) + { + colorInPalette = true; + break; + } + } + + // Store color if not on the palette + if (!colorInPalette) + { + palette[palCount] = pixels[i]; // Add pixels[i] to palette + palCount++; + + // We reached the limit of colors supported by palette + if (palCount >= maxPaletteSize) + { + i = image.width*image.height; // Finish palette get + TRACELOG(LOG_WARNING, "IMAGE: Palette is greater than %i colors", maxPaletteSize); + } + } + } + } + + UnloadImageColors(pixels); + } + + *colorCount = palCount; + + return palette; +} + +// Unload color data loaded with LoadImageColors() +void UnloadImageColors(Color *colors) +{ + RL_FREE(colors); +} + +// Unload colors palette loaded with LoadImagePalette() +void UnloadImagePalette(Color *colors) +{ + RL_FREE(colors); +} + +// Get image alpha border rectangle +// NOTE: Threshold is defined as a percentatge: 0.0f -> 1.0f +Rectangle GetImageAlphaBorder(Image image, float threshold) +{ + Rectangle crop = { 0 }; + + Color *pixels = LoadImageColors(image); + + if (pixels != NULL) + { + int xMin = 65536; // Define a big enough number + int xMax = 0; + int yMin = 65536; + int yMax = 0; + + for (int y = 0; y < image.height; y++) + { + for (int x = 0; x < image.width; x++) + { + if (pixels[y*image.width + x].a > (unsigned char)(threshold*255.0f)) + { + if (x < xMin) xMin = x; + if (x > xMax) xMax = x; + if (y < yMin) yMin = y; + if (y > yMax) yMax = y; + } + } + } + + // Check for empty blank image + if ((xMin != 65536) && (xMax != 65536)) + { + crop = (Rectangle){ (float)xMin, (float)yMin, (float)((xMax + 1) - xMin), (float)((yMax + 1) - yMin) }; + } + + UnloadImageColors(pixels); + } + + return crop; +} + +// Get image pixel color at (x, y) position +Color GetImageColor(Image image, int x, int y) +{ + Color color = { 0 }; + + if ((x >=0) && (x < image.width) && (y >= 0) && (y < image.height)) + { + switch (image.format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: + { + color.r = ((unsigned char *)image.data)[y*image.width + x]; + color.g = ((unsigned char *)image.data)[y*image.width + x]; + color.b = ((unsigned char *)image.data)[y*image.width + x]; + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + { + color.r = ((unsigned char *)image.data)[(y*image.width + x)*2]; + color.g = ((unsigned char *)image.data)[(y*image.width + x)*2]; + color.b = ((unsigned char *)image.data)[(y*image.width + x)*2]; + color.a = ((unsigned char *)image.data)[(y*image.width + x)*2 + 1]; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + unsigned short pixel = ((unsigned short *)image.data)[y*image.width + x]; + + color.r = (unsigned char)((float)((pixel & 0b1111100000000000) >> 11)*(255/31)); + color.g = (unsigned char)((float)((pixel & 0b0000011111000000) >> 6)*(255/31)); + color.b = (unsigned char)((float)((pixel & 0b0000000000111110) >> 1)*(255/31)); + color.a = (unsigned char)((pixel & 0b0000000000000001)*255); + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + { + unsigned short pixel = ((unsigned short *)image.data)[y*image.width + x]; + + color.r = (unsigned char)((float)((pixel & 0b1111100000000000) >> 11)*(255/31)); + color.g = (unsigned char)((float)((pixel & 0b0000011111100000) >> 5)*(255/63)); + color.b = (unsigned char)((float)(pixel & 0b0000000000011111)*(255/31)); + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + unsigned short pixel = ((unsigned short *)image.data)[y*image.width + x]; + + color.r = (unsigned char)((float)((pixel & 0b1111000000000000) >> 12)*(255/15)); + color.g = (unsigned char)((float)((pixel & 0b0000111100000000) >> 8)*(255/15)); + color.b = (unsigned char)((float)((pixel & 0b0000000011110000) >> 4)*(255/15)); + color.a = (unsigned char)((float)(pixel & 0b0000000000001111)*(255/15)); + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: + { + color.r = ((unsigned char *)image.data)[(y*image.width + x)*4]; + color.g = ((unsigned char *)image.data)[(y*image.width + x)*4 + 1]; + color.b = ((unsigned char *)image.data)[(y*image.width + x)*4 + 2]; + color.a = ((unsigned char *)image.data)[(y*image.width + x)*4 + 3]; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: + { + color.r = (unsigned char)((unsigned char *)image.data)[(y*image.width + x)*3]; + color.g = (unsigned char)((unsigned char *)image.data)[(y*image.width + x)*3 + 1]; + color.b = (unsigned char)((unsigned char *)image.data)[(y*image.width + x)*3 + 2]; + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32: + { + color.r = (unsigned char)(((float *)image.data)[y*image.width + x]*255.0f); + color.g = 0; + color.b = 0; + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32: + { + color.r = (unsigned char)(((float *)image.data)[(y*image.width + x)*3]*255.0f); + color.g = (unsigned char)(((float *)image.data)[(y*image.width + x)*3 + 1]*255.0f); + color.b = (unsigned char)(((float *)image.data)[(y*image.width + x)*3 + 2]*255.0f); + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: + { + color.r = (unsigned char)(((float *)image.data)[(y*image.width + x)*4]*255.0f); + color.g = (unsigned char)(((float *)image.data)[(y*image.width + x)*4]*255.0f); + color.b = (unsigned char)(((float *)image.data)[(y*image.width + x)*4]*255.0f); + color.a = (unsigned char)(((float *)image.data)[(y*image.width + x)*4]*255.0f); + + } break; + default: TRACELOG(LOG_WARNING, "Compressed image format does not support color reading"); break; + } + } + else TRACELOG(LOG_WARNING, "Requested image pixel (%i, %i) out of bounds", x, y); + + return color; +} + +//------------------------------------------------------------------------------------ +// Image drawing functions +//------------------------------------------------------------------------------------ +// Clear image background with given color +void ImageClearBackground(Image *dst, Color color) +{ + for (int i = 0; i < dst->width*dst->height; ++i) ImageDrawPixel(dst, i%dst->width, i/dst->width, color); +} + +// Draw pixel within an image +// NOTE: Compressed image formats not supported +void ImageDrawPixel(Image *dst, int x, int y, Color color) +{ + // Security check to avoid program crash + if ((dst->data == NULL) || (x < 0) || (x >= dst->width) || (y < 0) || (y >= dst->height)) return; + + switch (dst->format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: + { + // NOTE: Calculate grayscale equivalent color + Vector3 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + unsigned char gray = (unsigned char)((coln.x*0.299f + coln.y*0.587f + coln.z*0.114f)*255.0f); + + ((unsigned char *)dst->data)[y*dst->width + x] = gray; + + } break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + { + // NOTE: Calculate grayscale equivalent color + Vector3 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + unsigned char gray = (unsigned char)((coln.x*0.299f + coln.y*0.587f + coln.z*0.114f)*255.0f); + + ((unsigned char *)dst->data)[(y*dst->width + x)*2] = gray; + ((unsigned char *)dst->data)[(y*dst->width + x)*2 + 1] = color.a; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + { + // NOTE: Calculate R5G6B5 equivalent color + Vector3 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + + unsigned char r = (unsigned char)(round(coln.x*31.0f)); + unsigned char g = (unsigned char)(round(coln.y*63.0f)); + unsigned char b = (unsigned char)(round(coln.z*31.0f)); + + ((unsigned short *)dst->data)[y*dst->width + x] = (unsigned short)r << 11 | (unsigned short)g << 5 | (unsigned short)b; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + // NOTE: Calculate R5G5B5A1 equivalent color + Vector4 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f, (float)color.a/255.0f }; + + unsigned char r = (unsigned char)(round(coln.x*31.0f)); + unsigned char g = (unsigned char)(round(coln.y*31.0f)); + unsigned char b = (unsigned char)(round(coln.z*31.0f)); + unsigned char a = (coln.w > ((float)PIXELFORMAT_UNCOMPRESSED_R5G5B5A1_ALPHA_THRESHOLD/255.0f))? 1 : 0; + + ((unsigned short *)dst->data)[y*dst->width + x] = (unsigned short)r << 11 | (unsigned short)g << 6 | (unsigned short)b << 1 | (unsigned short)a; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + // NOTE: Calculate R5G5B5A1 equivalent color + Vector4 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f, (float)color.a/255.0f }; + + unsigned char r = (unsigned char)(round(coln.x*15.0f)); + unsigned char g = (unsigned char)(round(coln.y*15.0f)); + unsigned char b = (unsigned char)(round(coln.z*15.0f)); + unsigned char a = (unsigned char)(round(coln.w*15.0f)); + + ((unsigned short *)dst->data)[y*dst->width + x] = (unsigned short)r << 12 | (unsigned short)g << 8 | (unsigned short)b << 4 | (unsigned short)a; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: + { + ((unsigned char *)dst->data)[(y*dst->width + x)*3] = color.r; + ((unsigned char *)dst->data)[(y*dst->width + x)*3 + 1] = color.g; + ((unsigned char *)dst->data)[(y*dst->width + x)*3 + 2] = color.b; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: + { + ((unsigned char *)dst->data)[(y*dst->width + x)*4] = color.r; + ((unsigned char *)dst->data)[(y*dst->width + x)*4 + 1] = color.g; + ((unsigned char *)dst->data)[(y*dst->width + x)*4 + 2] = color.b; + ((unsigned char *)dst->data)[(y*dst->width + x)*4 + 3] = color.a; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32: + { + // NOTE: Calculate grayscale equivalent color (normalized to 32bit) + Vector3 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + + ((float *)dst->data)[y*dst->width + x] = coln.x*0.299f + coln.y*0.587f + coln.z*0.114f; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32: + { + // NOTE: Calculate R32G32B32 equivalent color (normalized to 32bit) + Vector3 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + + ((float *)dst->data)[(y*dst->width + x)*3] = coln.x; + ((float *)dst->data)[(y*dst->width + x)*3 + 1] = coln.y; + ((float *)dst->data)[(y*dst->width + x)*3 + 2] = coln.z; + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: + { + // NOTE: Calculate R32G32B32A32 equivalent color (normalized to 32bit) + Vector4 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f, (float)color.a/255.0f }; + + ((float *)dst->data)[(y*dst->width + x)*4] = coln.x; + ((float *)dst->data)[(y*dst->width + x)*4 + 1] = coln.y; + ((float *)dst->data)[(y*dst->width + x)*4 + 2] = coln.z; + ((float *)dst->data)[(y*dst->width + x)*4 + 3] = coln.w; + + } break; + default: break; + } +} + +// Draw pixel within an image (Vector version) +void ImageDrawPixelV(Image *dst, Vector2 position, Color color) +{ + ImageDrawPixel(dst, (int)position.x, (int)position.y, color); +} + +// Draw line within an image +void ImageDrawLine(Image *dst, int startPosX, int startPosY, int endPosX, int endPosY, Color color) +{ + // Using Bresenham's algorithm as described in + // Drawing Lines with Pixels - Joshua Scott - March 2012 + // https://classic.csunplugged.org/wp-content/uploads/2014/12/Lines.pdf + + int changeInX = (endPosX - startPosX); + int absChangeInX = (changeInX < 0)? -changeInX : changeInX; + int changeInY = (endPosY - startPosY); + int absChangeInY = (changeInY < 0)? -changeInY : changeInY; + + int startU, startV, endU, stepV; // Substitutions, either U = X, V = Y or vice versa. See loop at end of function + //int endV; // Not needed but left for better understanding, check code below + int A, B, P; // See linked paper above, explained down in the main loop + int reversedXY = (absChangeInY < absChangeInX); + + if (reversedXY) + { + A = 2*absChangeInY; + B = A - 2*absChangeInX; + P = A - absChangeInX; + + if (changeInX > 0) + { + startU = startPosX; + startV = startPosY; + endU = endPosX; + //endV = endPosY; + } + else + { + startU = endPosX; + startV = endPosY; + endU = startPosX; + //endV = startPosY; + + // Since start and end are reversed + changeInX = -changeInX; + changeInY = -changeInY; + } + + stepV = (changeInY < 0)? -1 : 1; + + ImageDrawPixel(dst, startU, startV, color); // At this point they are correctly ordered... + } + else + { + A = 2*absChangeInX; + B = A - 2*absChangeInY; + P = A - absChangeInY; + + if (changeInY > 0) + { + startU = startPosY; + startV = startPosX; + endU = endPosY; + //endV = endPosX; + } + else + { + startU = endPosY; + startV = endPosX; + endU = startPosY; + //endV = startPosX; + + // Since start and end are reversed + changeInX = -changeInX; + changeInY = -changeInY; + } + + stepV = (changeInX < 0)? -1 : 1; + + ImageDrawPixel(dst, startV, startU, color); // ... but need to be reversed here. Repeated in the main loop below + } + + // We already drew the start point. If we started at startU + 0, the line would be crooked and too short + for (int u = startU + 1, v = startV; u <= endU; u++) + { + if (P >= 0) + { + v += stepV; // Adjusts whenever we stray too far from the direct line. Details in the linked paper above + P += B; // Remembers that we corrected our path + } + else P += A; // Remembers how far we are from the direct line + + if (reversedXY) ImageDrawPixel(dst, u, v, color); + else ImageDrawPixel(dst, v, u, color); + } +} + +// Draw line within an image (Vector version) +void ImageDrawLineV(Image *dst, Vector2 start, Vector2 end, Color color) +{ + ImageDrawLine(dst, (int)start.x, (int)start.y, (int)end.x, (int)end.y, color); +} + +// Draw circle within an image +void ImageDrawCircle(Image *dst, int centerX, int centerY, int radius, Color color) +{ + int x = 0, y = radius; + int decesionParameter = 3 - 2*radius; + + while (y >= x) + { + ImageDrawPixel(dst, centerX + x, centerY + y, color); + ImageDrawPixel(dst, centerX - x, centerY + y, color); + ImageDrawPixel(dst, centerX + x, centerY - y, color); + ImageDrawPixel(dst, centerX - x, centerY - y, color); + ImageDrawPixel(dst, centerX + y, centerY + x, color); + ImageDrawPixel(dst, centerX - y, centerY + x, color); + ImageDrawPixel(dst, centerX + y, centerY - x, color); + ImageDrawPixel(dst, centerX - y, centerY - x, color); + x++; + + if (decesionParameter > 0) + { + y--; + decesionParameter = decesionParameter + 4*(x - y) + 10; + } + else decesionParameter = decesionParameter + 4*x + 6; + } +} + +// Draw circle within an image (Vector version) +void ImageDrawCircleV(Image *dst, Vector2 center, int radius, Color color) +{ + ImageDrawCircle(dst, (int)center.x, (int)center.y, radius, color); +} + +// Draw rectangle within an image +void ImageDrawRectangle(Image *dst, int posX, int posY, int width, int height, Color color) +{ + ImageDrawRectangleRec(dst, (Rectangle){ (float)posX, (float)posY, (float)width, (float)height }, color); +} + +// Draw rectangle within an image (Vector version) +void ImageDrawRectangleV(Image *dst, Vector2 position, Vector2 size, Color color) +{ + ImageDrawRectangle(dst, (int)position.x, (int)position.y, (int)size.x, (int)size.y, color); +} + +// Draw rectangle within an image +void ImageDrawRectangleRec(Image *dst, Rectangle rec, Color color) +{ + // Security check to avoid program crash + if ((dst->data == NULL) || (dst->width == 0) || (dst->height == 0)) return; + + int sy = (int)rec.y; + int ey = sy + (int)rec.height; + + int sx = (int)rec.x; + int ex = sx + (int)rec.width; + + for (int y = sy; y < ey; y++) + { + for (int x = sx; x < ex; x++) + { + ImageDrawPixel(dst, x, y, color); + } + } +} + +// Draw rectangle lines within an image +void ImageDrawRectangleLines(Image *dst, Rectangle rec, int thick, Color color) +{ + ImageDrawRectangle(dst, (int)rec.x, (int)rec.y, (int)rec.width, thick, color); + ImageDrawRectangle(dst, (int)rec.x, (int)(rec.y + thick), thick, (int)(rec.height - thick*2), color); + ImageDrawRectangle(dst, (int)(rec.x + rec.width - thick), (int)(rec.y + thick), thick, (int)(rec.height - thick*2), color); + ImageDrawRectangle(dst, (int)rec.x, (int)(rec.y + rec.height - thick), (int)rec.width, thick, color); +} + +// Draw an image (source) within an image (destination) +// NOTE: Color tint is applied to source image +void ImageDraw(Image *dst, Image src, Rectangle srcRec, Rectangle dstRec, Color tint) +{ + // Security check to avoid program crash + if ((dst->data == NULL) || (dst->width == 0) || (dst->height == 0) || + (src.data == NULL) || (src.width == 0) || (src.height == 0)) return; + + if (dst->mipmaps > 1) TRACELOG(LOG_WARNING, "Image drawing only applied to base mipmap level"); + if (dst->format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image drawing not supported for compressed formats"); + else + { + Image srcMod = { 0 }; // Source copy (in case it was required) + Image *srcPtr = &src; // Pointer to source image + bool useSrcMod = false; // Track source copy required + + // Source rectangle out-of-bounds security checks + if (srcRec.x < 0) { srcRec.width += srcRec.x; srcRec.x = 0; } + if (srcRec.y < 0) { srcRec.height += srcRec.y; srcRec.y = 0; } + if ((srcRec.x + srcRec.width) > src.width) srcRec.width = src.width - srcRec.x; + if ((srcRec.y + srcRec.height) > src.height) srcRec.height = src.height - srcRec.y; + + // Check if source rectangle needs to be resized to destination rectangle + // In that case, we make a copy of source and we apply all required transform + if (((int)srcRec.width != (int)dstRec.width) || ((int)srcRec.height != (int)dstRec.height)) + { + srcMod = ImageFromImage(src, srcRec); // Create image from another image + ImageResize(&srcMod, (int)dstRec.width, (int)dstRec.height); // Resize to destination rectangle + srcRec = (Rectangle){ 0, 0, (float)srcMod.width, (float)srcMod.height }; + + srcPtr = &srcMod; + useSrcMod = true; + } + + // Destination rectangle out-of-bounds security checks + if (dstRec.x < 0) + { + srcRec.x = -dstRec.x; + srcRec.width += dstRec.x; + dstRec.x = 0; + } + else if ((dstRec.x + srcRec.width) > dst->width) srcRec.width = dst->width - dstRec.x; + + if (dstRec.y < 0) + { + srcRec.y = -dstRec.y; + srcRec.height += dstRec.y; + dstRec.y = 0; + } + else if ((dstRec.y + srcRec.height) > dst->height) srcRec.height = dst->height - dstRec.y; + + if (dst->width < srcRec.width) srcRec.width = (float)dst->width; + if (dst->height < srcRec.height) srcRec.height = (float)dst->height; + + // This blitting method is quite fast! The process followed is: + // for every pixel -> [get_src_format/get_dst_format -> blend -> format_to_dst] + // Some optimization ideas: + // [x] Avoid creating source copy if not required (no resize required) + // [x] Optimize ImageResize() for pixel format (alternative: ImageResizeNN()) + // [x] Optimize ColorAlphaBlend() to avoid processing (alpha = 0) and (alpha = 1) + // [x] Optimize ColorAlphaBlend() for faster operations (maybe avoiding divs?) + // [x] Consider fast path: no alpha blending required cases (src has no alpha) + // [x] Consider fast path: same src/dst format with no alpha -> direct line copy + // [-] GetPixelColor(): Get Vector4 instead of Color, easier for ColorAlphaBlend() + // [ ] Support f32bit channels drawing + + // TODO: Support PIXELFORMAT_UNCOMPRESSED_R32, PIXELFORMAT_UNCOMPRESSED_R32G32B32, PIXELFORMAT_UNCOMPRESSED_R32G32B32A32 + + Color colSrc, colDst, blend; + bool blendRequired = true; + + // Fast path: Avoid blend if source has no alpha to blend + if ((tint.a == 255) && ((srcPtr->format == PIXELFORMAT_UNCOMPRESSED_GRAYSCALE) || (srcPtr->format == PIXELFORMAT_UNCOMPRESSED_R8G8B8) || (srcPtr->format == PIXELFORMAT_UNCOMPRESSED_R5G6B5))) blendRequired = false; + + int strideDst = GetPixelDataSize(dst->width, 1, dst->format); + int bytesPerPixelDst = strideDst/(dst->width); + + int strideSrc = GetPixelDataSize(srcPtr->width, 1, srcPtr->format); + int bytesPerPixelSrc = strideSrc/(srcPtr->width); + + unsigned char *pSrcBase = (unsigned char *)srcPtr->data + ((int)srcRec.y*srcPtr->width + (int)srcRec.x)*bytesPerPixelSrc; + unsigned char *pDstBase = (unsigned char *)dst->data + ((int)dstRec.y*dst->width + (int)dstRec.x)*bytesPerPixelDst; + + for (int y = 0; y < (int)srcRec.height; y++) + { + unsigned char *pSrc = pSrcBase; + unsigned char *pDst = pDstBase; + + // Fast path: Avoid moving pixel by pixel if no blend required and same format + if (!blendRequired && (srcPtr->format == dst->format)) memcpy(pDst, pSrc, (int)(srcRec.width)*bytesPerPixelSrc); + else + { + for (int x = 0; x < (int)srcRec.width; x++) + { + colSrc = GetPixelColor(pSrc, srcPtr->format); + colDst = GetPixelColor(pDst, dst->format); + + // Fast path: Avoid blend if source has no alpha to blend + if (blendRequired) blend = ColorAlphaBlend(colDst, colSrc, tint); + else blend = colSrc; + + SetPixelColor(pDst, blend, dst->format); + + pDst += bytesPerPixelDst; + pSrc += bytesPerPixelSrc; + } + } + + pSrcBase += strideSrc; + pDstBase += strideDst; + } + + if (useSrcMod) UnloadImage(srcMod); // Unload source modified image + } +} + +// Draw text (default font) within an image (destination) +void ImageDrawText(Image *dst, const char *text, int posX, int posY, int fontSize, Color color) +{ +#if defined(SUPPORT_MODULE_RTEXT) + Vector2 position = { (float)posX, (float)posY }; + // NOTE: For default font, spacing is set to desired font size / default font size (10) + ImageDrawTextEx(dst, GetFontDefault(), text, position, (float)fontSize, (float)fontSize/10, color); // WARNING: Module required: rtext +#else + TRACELOG(LOG_WARNING, "IMAGE: ImageDrawText() requires module: rtext"); +#endif +} + +// Draw text (custom sprite font) within an image (destination) +void ImageDrawTextEx(Image *dst, Font font, const char *text, Vector2 position, float fontSize, float spacing, Color tint) +{ + Image imText = ImageTextEx(font, text, fontSize, spacing, tint); + + Rectangle srcRec = { 0.0f, 0.0f, (float)imText.width, (float)imText.height }; + Rectangle dstRec = { position.x, position.y, (float)imText.width, (float)imText.height }; + + ImageDraw(dst, imText, srcRec, dstRec, WHITE); + + UnloadImage(imText); +} + +//------------------------------------------------------------------------------------ +// Texture loading functions +//------------------------------------------------------------------------------------ +// Load texture from file into GPU memory (VRAM) +Texture2D LoadTexture(const char *fileName) +{ + Texture2D texture = { 0 }; + + Image image = LoadImage(fileName); + + if (image.data != NULL) + { + texture = LoadTextureFromImage(image); + UnloadImage(image); + } + + return texture; +} + +// Load a texture from image data +// NOTE: image is not unloaded, it must be done manually +Texture2D LoadTextureFromImage(Image image) +{ + Texture2D texture = { 0 }; + + if ((image.width != 0) && (image.height != 0)) + { + texture.id = rlLoadTexture(image.data, image.width, image.height, image.format, image.mipmaps); + } + else TRACELOG(LOG_WARNING, "IMAGE: Data is not valid to load texture"); + + texture.width = image.width; + texture.height = image.height; + texture.mipmaps = image.mipmaps; + texture.format = image.format; + + return texture; +} + +// Load cubemap from image, multiple image cubemap layouts supported +TextureCubemap LoadTextureCubemap(Image image, int layout) +{ + TextureCubemap cubemap = { 0 }; + + if (layout == CUBEMAP_LAYOUT_AUTO_DETECT) // Try to automatically guess layout type + { + // Check image width/height to determine the type of cubemap provided + if (image.width > image.height) + { + if ((image.width/6) == image.height) { layout = CUBEMAP_LAYOUT_LINE_HORIZONTAL; cubemap.width = image.width/6; } + else if ((image.width/4) == (image.height/3)) { layout = CUBEMAP_LAYOUT_CROSS_FOUR_BY_THREE; cubemap.width = image.width/4; } + else if (image.width >= (int)((float)image.height*1.85f)) { layout = CUBEMAP_LAYOUT_PANORAMA; cubemap.width = image.width/4; } + } + else if (image.height > image.width) + { + if ((image.height/6) == image.width) { layout = CUBEMAP_LAYOUT_LINE_VERTICAL; cubemap.width = image.height/6; } + else if ((image.width/3) == (image.height/4)) { layout = CUBEMAP_LAYOUT_CROSS_THREE_BY_FOUR; cubemap.width = image.width/3; } + } + + cubemap.height = cubemap.width; + } + + // Layout provided or already auto-detected + if (layout != CUBEMAP_LAYOUT_AUTO_DETECT) + { + int size = cubemap.width; + + Image faces = { 0 }; // Vertical column image + Rectangle faceRecs[6] = { 0 }; // Face source rectangles + for (int i = 0; i < 6; i++) faceRecs[i] = (Rectangle){ 0, 0, (float)size, (float)size }; + + if (layout == CUBEMAP_LAYOUT_LINE_VERTICAL) + { + faces = ImageCopy(image); // Image data already follows expected convention + } + else if (layout == CUBEMAP_LAYOUT_PANORAMA) + { + // TODO: Convert panorama image to square faces... + // Ref: https://github.com/denivip/panorama/blob/master/panorama.cpp + } + else + { + if (layout == CUBEMAP_LAYOUT_LINE_HORIZONTAL) for (int i = 0; i < 6; i++) faceRecs[i].x = (float)size*i; + else if (layout == CUBEMAP_LAYOUT_CROSS_THREE_BY_FOUR) + { + faceRecs[0].x = (float)size; faceRecs[0].y = (float)size; + faceRecs[1].x = (float)size; faceRecs[1].y = (float)size*3; + faceRecs[2].x = (float)size; faceRecs[2].y = 0; + faceRecs[3].x = (float)size; faceRecs[3].y = (float)size*2; + faceRecs[4].x = 0; faceRecs[4].y = (float)size; + faceRecs[5].x = (float)size*2; faceRecs[5].y = (float)size; + } + else if (layout == CUBEMAP_LAYOUT_CROSS_FOUR_BY_THREE) + { + faceRecs[0].x = (float)size*2; faceRecs[0].y = (float)size; + faceRecs[1].x = 0; faceRecs[1].y = (float)size; + faceRecs[2].x = (float)size; faceRecs[2].y = 0; + faceRecs[3].x = (float)size; faceRecs[3].y = (float)size*2; + faceRecs[4].x = (float)size; faceRecs[4].y = (float)size; + faceRecs[5].x = (float)size*3; faceRecs[5].y = (float)size; + } + + // Convert image data to 6 faces in a vertical column, that's the optimum layout for loading + faces = GenImageColor(size, size*6, MAGENTA); + ImageFormat(&faces, image.format); + + // NOTE: Image formating does not work with compressed textures + + for (int i = 0; i < 6; i++) ImageDraw(&faces, image, faceRecs[i], (Rectangle){ 0, (float)size*i, (float)size, (float)size }, WHITE); + } + + // NOTE: Cubemap data is expected to be provided as 6 images in a single data array, + // one after the other (that's a vertical image), following convention: +X, -X, +Y, -Y, +Z, -Z + cubemap.id = rlLoadTextureCubemap(faces.data, size, faces.format); + if (cubemap.id == 0) TRACELOG(LOG_WARNING, "IMAGE: Failed to load cubemap image"); + + UnloadImage(faces); + } + else TRACELOG(LOG_WARNING, "IMAGE: Failed to detect cubemap image layout"); + + return cubemap; +} + +// Load texture for rendering (framebuffer) +// NOTE: Render texture is loaded by default with RGBA color attachment and depth RenderBuffer +RenderTexture2D LoadRenderTexture(int width, int height) +{ + RenderTexture2D target = { 0 }; + + target.id = rlLoadFramebuffer(width, height); // Load an empty framebuffer + + if (target.id > 0) + { + rlEnableFramebuffer(target.id); + + // Create color texture (default to RGBA) + target.texture.id = rlLoadTexture(NULL, width, height, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, 1); + target.texture.width = width; + target.texture.height = height; + target.texture.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + target.texture.mipmaps = 1; + + // Create depth renderbuffer/texture + target.depth.id = rlLoadTextureDepth(width, height, true); + target.depth.width = width; + target.depth.height = height; + target.depth.format = 19; //DEPTH_COMPONENT_24BIT? + target.depth.mipmaps = 1; + + // Attach color texture and depth renderbuffer/texture to FBO + rlFramebufferAttach(target.id, target.texture.id, RL_ATTACHMENT_COLOR_CHANNEL0, RL_ATTACHMENT_TEXTURE2D, 0); + rlFramebufferAttach(target.id, target.depth.id, RL_ATTACHMENT_DEPTH, RL_ATTACHMENT_RENDERBUFFER, 0); + + // Check if fbo is complete with attachments (valid) + if (rlFramebufferComplete(target.id)) TRACELOG(LOG_INFO, "FBO: [ID %i] Framebuffer object created successfully", target.id); + + rlDisableFramebuffer(); + } + else TRACELOG(LOG_WARNING, "FBO: Framebuffer object can not be created"); + + return target; +} + +// Unload texture from GPU memory (VRAM) +void UnloadTexture(Texture2D texture) +{ + if (texture.id > 0) + { + rlUnloadTexture(texture.id); + + TRACELOG(LOG_INFO, "TEXTURE: [ID %i] Unloaded texture data from VRAM (GPU)", texture.id); + } +} + +// Unload render texture from GPU memory (VRAM) +void UnloadRenderTexture(RenderTexture2D target) +{ + if (target.id > 0) + { + // Color texture attached to FBO is deleted + rlUnloadTexture(target.texture.id); + + // NOTE: Depth texture/renderbuffer is automatically + // queried and deleted before deleting framebuffer + rlUnloadFramebuffer(target.id); + } +} + +// Update GPU texture with new data +// NOTE: pixels data must match texture.format +void UpdateTexture(Texture2D texture, const void *pixels) +{ + rlUpdateTexture(texture.id, 0, 0, texture.width, texture.height, texture.format, pixels); +} + +// Update GPU texture rectangle with new data +// NOTE: pixels data must match texture.format +void UpdateTextureRec(Texture2D texture, Rectangle rec, const void *pixels) +{ + rlUpdateTexture(texture.id, (int)rec.x, (int)rec.y, (int)rec.width, (int)rec.height, texture.format, pixels); +} + +//------------------------------------------------------------------------------------ +// Texture configuration functions +//------------------------------------------------------------------------------------ +// Generate GPU mipmaps for a texture +void GenTextureMipmaps(Texture2D *texture) +{ + // NOTE: NPOT textures support check inside function + // On WebGL (OpenGL ES 2.0) NPOT textures support is limited + rlGenTextureMipmaps(texture->id, texture->width, texture->height, texture->format, &texture->mipmaps); +} + +// Set texture scaling filter mode +void SetTextureFilter(Texture2D texture, int filter) +{ + switch (filter) + { + case TEXTURE_FILTER_POINT: + { + if (texture.mipmaps > 1) + { + // RL_TEXTURE_FILTER_MIP_NEAREST - tex filter: POINT, mipmaps filter: POINT (sharp switching between mipmaps) + rlTextureParameters(texture.id, RL_TEXTURE_MIN_FILTER, RL_TEXTURE_FILTER_MIP_NEAREST); + + // RL_TEXTURE_FILTER_NEAREST - tex filter: POINT (no filter), no mipmaps + rlTextureParameters(texture.id, RL_TEXTURE_MAG_FILTER, RL_TEXTURE_FILTER_NEAREST); + } + else + { + // RL_TEXTURE_FILTER_NEAREST - tex filter: POINT (no filter), no mipmaps + rlTextureParameters(texture.id, RL_TEXTURE_MIN_FILTER, RL_TEXTURE_FILTER_NEAREST); + rlTextureParameters(texture.id, RL_TEXTURE_MAG_FILTER, RL_TEXTURE_FILTER_NEAREST); + } + } break; + case TEXTURE_FILTER_BILINEAR: + { + if (texture.mipmaps > 1) + { + // RL_TEXTURE_FILTER_LINEAR_MIP_NEAREST - tex filter: BILINEAR, mipmaps filter: POINT (sharp switching between mipmaps) + // Alternative: RL_TEXTURE_FILTER_NEAREST_MIP_LINEAR - tex filter: POINT, mipmaps filter: BILINEAR (smooth transition between mipmaps) + rlTextureParameters(texture.id, RL_TEXTURE_MIN_FILTER, RL_TEXTURE_FILTER_LINEAR_MIP_NEAREST); + + // RL_TEXTURE_FILTER_LINEAR - tex filter: BILINEAR, no mipmaps + rlTextureParameters(texture.id, RL_TEXTURE_MAG_FILTER, RL_TEXTURE_FILTER_LINEAR); + } + else + { + // RL_TEXTURE_FILTER_LINEAR - tex filter: BILINEAR, no mipmaps + rlTextureParameters(texture.id, RL_TEXTURE_MIN_FILTER, RL_TEXTURE_FILTER_LINEAR); + rlTextureParameters(texture.id, RL_TEXTURE_MAG_FILTER, RL_TEXTURE_FILTER_LINEAR); + } + } break; + case TEXTURE_FILTER_TRILINEAR: + { + if (texture.mipmaps > 1) + { + // RL_TEXTURE_FILTER_MIP_LINEAR - tex filter: BILINEAR, mipmaps filter: BILINEAR (smooth transition between mipmaps) + rlTextureParameters(texture.id, RL_TEXTURE_MIN_FILTER, RL_TEXTURE_FILTER_MIP_LINEAR); + + // RL_TEXTURE_FILTER_LINEAR - tex filter: BILINEAR, no mipmaps + rlTextureParameters(texture.id, RL_TEXTURE_MAG_FILTER, RL_TEXTURE_FILTER_LINEAR); + } + else + { + TRACELOG(LOG_WARNING, "TEXTURE: [ID %i] No mipmaps available for TRILINEAR texture filtering", texture.id); + + // RL_TEXTURE_FILTER_LINEAR - tex filter: BILINEAR, no mipmaps + rlTextureParameters(texture.id, RL_TEXTURE_MIN_FILTER, RL_TEXTURE_FILTER_LINEAR); + rlTextureParameters(texture.id, RL_TEXTURE_MAG_FILTER, RL_TEXTURE_FILTER_LINEAR); + } + } break; + case TEXTURE_FILTER_ANISOTROPIC_4X: rlTextureParameters(texture.id, RL_TEXTURE_FILTER_ANISOTROPIC, 4); break; + case TEXTURE_FILTER_ANISOTROPIC_8X: rlTextureParameters(texture.id, RL_TEXTURE_FILTER_ANISOTROPIC, 8); break; + case TEXTURE_FILTER_ANISOTROPIC_16X: rlTextureParameters(texture.id, RL_TEXTURE_FILTER_ANISOTROPIC, 16); break; + default: break; + } +} + +// Set texture wrapping mode +void SetTextureWrap(Texture2D texture, int wrap) +{ + switch (wrap) + { + case TEXTURE_WRAP_REPEAT: + { + // NOTE: It only works if NPOT textures are supported, i.e. OpenGL ES 2.0 could not support it + rlTextureParameters(texture.id, RL_TEXTURE_WRAP_S, RL_TEXTURE_WRAP_REPEAT); + rlTextureParameters(texture.id, RL_TEXTURE_WRAP_T, RL_TEXTURE_WRAP_REPEAT); + } break; + case TEXTURE_WRAP_CLAMP: + { + rlTextureParameters(texture.id, RL_TEXTURE_WRAP_S, RL_TEXTURE_WRAP_CLAMP); + rlTextureParameters(texture.id, RL_TEXTURE_WRAP_T, RL_TEXTURE_WRAP_CLAMP); + } break; + case TEXTURE_WRAP_MIRROR_REPEAT: + { + rlTextureParameters(texture.id, RL_TEXTURE_WRAP_S, RL_TEXTURE_WRAP_MIRROR_REPEAT); + rlTextureParameters(texture.id, RL_TEXTURE_WRAP_T, RL_TEXTURE_WRAP_MIRROR_REPEAT); + } break; + case TEXTURE_WRAP_MIRROR_CLAMP: + { + rlTextureParameters(texture.id, RL_TEXTURE_WRAP_S, RL_TEXTURE_WRAP_MIRROR_CLAMP); + rlTextureParameters(texture.id, RL_TEXTURE_WRAP_T, RL_TEXTURE_WRAP_MIRROR_CLAMP); + } break; + default: break; + } +} + +//------------------------------------------------------------------------------------ +// Texture drawing functions +//------------------------------------------------------------------------------------ +// Draw a Texture2D +void DrawTexture(Texture2D texture, int posX, int posY, Color tint) +{ + DrawTextureEx(texture, (Vector2){ (float)posX, (float)posY }, 0.0f, 1.0f, tint); +} + +// Draw a Texture2D with position defined as Vector2 +void DrawTextureV(Texture2D texture, Vector2 position, Color tint) +{ + DrawTextureEx(texture, position, 0, 1.0f, tint); +} + +// Draw a Texture2D with extended parameters +void DrawTextureEx(Texture2D texture, Vector2 position, float rotation, float scale, Color tint) +{ + Rectangle source = { 0.0f, 0.0f, (float)texture.width, (float)texture.height }; + Rectangle dest = { position.x, position.y, (float)texture.width*scale, (float)texture.height*scale }; + Vector2 origin = { 0.0f, 0.0f }; + + DrawTexturePro(texture, source, dest, origin, rotation, tint); +} + +// Draw a part of a texture (defined by a rectangle) +void DrawTextureRec(Texture2D texture, Rectangle source, Vector2 position, Color tint) +{ + Rectangle dest = { position.x, position.y, fabsf(source.width), fabsf(source.height) }; + Vector2 origin = { 0.0f, 0.0f }; + + DrawTexturePro(texture, source, dest, origin, 0.0f, tint); +} + +// Draw texture quad with tiling and offset parameters +// NOTE: Tiling and offset should be provided considering normalized texture values [0..1] +// i.e tiling = { 1.0f, 1.0f } refers to all texture, offset = { 0.5f, 0.5f } moves texture origin to center +void DrawTextureQuad(Texture2D texture, Vector2 tiling, Vector2 offset, Rectangle quad, Color tint) +{ + // WARNING: This solution only works if TEXTURE_WRAP_REPEAT is supported, + // NPOT textures supported is required and OpenGL ES 2.0 could not support it + Rectangle source = { offset.x*texture.width, offset.y*texture.height, tiling.x*texture.width, tiling.y*texture.height }; + Vector2 origin = { 0.0f, 0.0f }; + + DrawTexturePro(texture, source, quad, origin, 0.0f, tint); +} + +// Draw part of a texture (defined by a rectangle) with rotation and scale tiled into dest. +// NOTE: For tilling a whole texture DrawTextureQuad() is better +void DrawTextureTiled(Texture2D texture, Rectangle source, Rectangle dest, Vector2 origin, float rotation, float scale, Color tint) +{ + if ((texture.id <= 0) || (scale <= 0.0f)) return; // Wanna see a infinite loop?!...just delete this line! + if ((source.width == 0) || (source.height == 0)) return; + + int tileWidth = (int)(source.width*scale), tileHeight = (int)(source.height*scale); + if ((dest.width < tileWidth) && (dest.height < tileHeight)) + { + // Can fit only one tile + DrawTexturePro(texture, (Rectangle){source.x, source.y, ((float)dest.width/tileWidth)*source.width, ((float)dest.height/tileHeight)*source.height}, + (Rectangle){dest.x, dest.y, dest.width, dest.height}, origin, rotation, tint); + } + else if (dest.width <= tileWidth) + { + // Tiled vertically (one column) + int dy = 0; + for (;dy+tileHeight < dest.height; dy += tileHeight) + { + DrawTexturePro(texture, (Rectangle){source.x, source.y, ((float)dest.width/tileWidth)*source.width, source.height}, (Rectangle){dest.x, dest.y + dy, dest.width, (float)tileHeight}, origin, rotation, tint); + } + + // Fit last tile + if (dy < dest.height) + { + DrawTexturePro(texture, (Rectangle){source.x, source.y, ((float)dest.width/tileWidth)*source.width, ((float)(dest.height - dy)/tileHeight)*source.height}, + (Rectangle){dest.x, dest.y + dy, dest.width, dest.height - dy}, origin, rotation, tint); + } + } + else if (dest.height <= tileHeight) + { + // Tiled horizontally (one row) + int dx = 0; + for (;dx+tileWidth < dest.width; dx += tileWidth) + { + DrawTexturePro(texture, (Rectangle){source.x, source.y, source.width, ((float)dest.height/tileHeight)*source.height}, (Rectangle){dest.x + dx, dest.y, (float)tileWidth, dest.height}, origin, rotation, tint); + } + + // Fit last tile + if (dx < dest.width) + { + DrawTexturePro(texture, (Rectangle){source.x, source.y, ((float)(dest.width - dx)/tileWidth)*source.width, ((float)dest.height/tileHeight)*source.height}, + (Rectangle){dest.x + dx, dest.y, dest.width - dx, dest.height}, origin, rotation, tint); + } + } + else + { + // Tiled both horizontally and vertically (rows and columns) + int dx = 0; + for (;dx+tileWidth < dest.width; dx += tileWidth) + { + int dy = 0; + for (;dy+tileHeight < dest.height; dy += tileHeight) + { + DrawTexturePro(texture, source, (Rectangle){dest.x + dx, dest.y + dy, (float)tileWidth, (float)tileHeight}, origin, rotation, tint); + } + + if (dy < dest.height) + { + DrawTexturePro(texture, (Rectangle){source.x, source.y, source.width, ((float)(dest.height - dy)/tileHeight)*source.height}, + (Rectangle){dest.x + dx, dest.y + dy, (float)tileWidth, dest.height - dy}, origin, rotation, tint); + } + } + + // Fit last column of tiles + if (dx < dest.width) + { + int dy = 0; + for (;dy+tileHeight < dest.height; dy += tileHeight) + { + DrawTexturePro(texture, (Rectangle){source.x, source.y, ((float)(dest.width - dx)/tileWidth)*source.width, source.height}, + (Rectangle){dest.x + dx, dest.y + dy, dest.width - dx, (float)tileHeight}, origin, rotation, tint); + } + + // Draw final tile in the bottom right corner + if (dy < dest.height) + { + DrawTexturePro(texture, (Rectangle){source.x, source.y, ((float)(dest.width - dx)/tileWidth)*source.width, ((float)(dest.height - dy)/tileHeight)*source.height}, + (Rectangle){dest.x + dx, dest.y + dy, dest.width - dx, dest.height - dy}, origin, rotation, tint); + } + } + } +} + +// Draw a part of a texture (defined by a rectangle) with 'pro' parameters +// NOTE: origin is relative to destination rectangle size +void DrawTexturePro(Texture2D texture, Rectangle source, Rectangle dest, Vector2 origin, float rotation, Color tint) +{ + // Check if texture is valid + if (texture.id > 0) + { + float width = (float)texture.width; + float height = (float)texture.height; + + bool flipX = false; + + if (source.width < 0) { flipX = true; source.width *= -1; } + if (source.height < 0) source.y -= source.height; + + Vector2 topLeft = { 0 }; + Vector2 topRight = { 0 }; + Vector2 bottomLeft = { 0 }; + Vector2 bottomRight = { 0 }; + + // Only calculate rotation if needed + if (rotation == 0.0f) + { + float x = dest.x - origin.x; + float y = dest.y - origin.y; + topLeft = (Vector2){ x, y }; + topRight = (Vector2){ x + dest.width, y }; + bottomLeft = (Vector2){ x, y + dest.height }; + bottomRight = (Vector2){ x + dest.width, y + dest.height }; + } + else + { + float sinRotation = sinf(rotation*DEG2RAD); + float cosRotation = cosf(rotation*DEG2RAD); + float x = dest.x; + float y = dest.y; + float dx = -origin.x; + float dy = -origin.y; + + topLeft.x = x + dx*cosRotation - dy*sinRotation; + topLeft.y = y + dx*sinRotation + dy*cosRotation; + + topRight.x = x + (dx + dest.width)*cosRotation - dy*sinRotation; + topRight.y = y + (dx + dest.width)*sinRotation + dy*cosRotation; + + bottomLeft.x = x + dx*cosRotation - (dy + dest.height)*sinRotation; + bottomLeft.y = y + dx*sinRotation + (dy + dest.height)*cosRotation; + + bottomRight.x = x + (dx + dest.width)*cosRotation - (dy + dest.height)*sinRotation; + bottomRight.y = y + (dx + dest.width)*sinRotation + (dy + dest.height)*cosRotation; + } + + rlCheckRenderBatchLimit(4); // Make sure there is enough free space on the batch buffer + + rlSetTexture(texture.id); + rlBegin(RL_QUADS); + + rlColor4ub(tint.r, tint.g, tint.b, tint.a); + rlNormal3f(0.0f, 0.0f, 1.0f); // Normal vector pointing towards viewer + + // Top-left corner for texture and quad + if (flipX) rlTexCoord2f((source.x + source.width)/width, source.y/height); + else rlTexCoord2f(source.x/width, source.y/height); + rlVertex2f(topLeft.x, topLeft.y); + + // Bottom-left corner for texture and quad + if (flipX) rlTexCoord2f((source.x + source.width)/width, (source.y + source.height)/height); + else rlTexCoord2f(source.x/width, (source.y + source.height)/height); + rlVertex2f(bottomLeft.x, bottomLeft.y); + + // Bottom-right corner for texture and quad + if (flipX) rlTexCoord2f(source.x/width, (source.y + source.height)/height); + else rlTexCoord2f((source.x + source.width)/width, (source.y + source.height)/height); + rlVertex2f(bottomRight.x, bottomRight.y); + + // Top-right corner for texture and quad + if (flipX) rlTexCoord2f(source.x/width, source.y/height); + else rlTexCoord2f((source.x + source.width)/width, source.y/height); + rlVertex2f(topRight.x, topRight.y); + + rlEnd(); + rlSetTexture(0); + + // NOTE: Vertex position can be transformed using matrices + // but the process is way more costly than just calculating + // the vertex positions manually, like done above. + // I leave here the old implementation for educational pourposes, + // just in case someone wants to do some performance test + /* + rlSetTexture(texture.id); + rlPushMatrix(); + rlTranslatef(dest.x, dest.y, 0.0f); + if (rotation != 0.0f) rlRotatef(rotation, 0.0f, 0.0f, 1.0f); + rlTranslatef(-origin.x, -origin.y, 0.0f); + + rlBegin(RL_QUADS); + rlColor4ub(tint.r, tint.g, tint.b, tint.a); + rlNormal3f(0.0f, 0.0f, 1.0f); // Normal vector pointing towards viewer + + // Bottom-left corner for texture and quad + if (flipX) rlTexCoord2f((source.x + source.width)/width, source.y/height); + else rlTexCoord2f(source.x/width, source.y/height); + rlVertex2f(0.0f, 0.0f); + + // Bottom-right corner for texture and quad + if (flipX) rlTexCoord2f((source.x + source.width)/width, (source.y + source.height)/height); + else rlTexCoord2f(source.x/width, (source.y + source.height)/height); + rlVertex2f(0.0f, dest.height); + + // Top-right corner for texture and quad + if (flipX) rlTexCoord2f(source.x/width, (source.y + source.height)/height); + else rlTexCoord2f((source.x + source.width)/width, (source.y + source.height)/height); + rlVertex2f(dest.width, dest.height); + + // Top-left corner for texture and quad + if (flipX) rlTexCoord2f(source.x/width, source.y/height); + else rlTexCoord2f((source.x + source.width)/width, source.y/height); + rlVertex2f(dest.width, 0.0f); + rlEnd(); + rlPopMatrix(); + rlSetTexture(0); + */ + } +} + +// Draws a texture (or part of it) that stretches or shrinks nicely using n-patch info +void DrawTextureNPatch(Texture2D texture, NPatchInfo nPatchInfo, Rectangle dest, Vector2 origin, float rotation, Color tint) +{ + if (texture.id > 0) + { + float width = (float)texture.width; + float height = (float)texture.height; + + float patchWidth = ((int)dest.width <= 0)? 0.0f : dest.width; + float patchHeight = ((int)dest.height <= 0)? 0.0f : dest.height; + + if (nPatchInfo.source.width < 0) nPatchInfo.source.x -= nPatchInfo.source.width; + if (nPatchInfo.source.height < 0) nPatchInfo.source.y -= nPatchInfo.source.height; + if (nPatchInfo.layout == NPATCH_THREE_PATCH_HORIZONTAL) patchHeight = nPatchInfo.source.height; + if (nPatchInfo.layout == NPATCH_THREE_PATCH_VERTICAL) patchWidth = nPatchInfo.source.width; + + bool drawCenter = true; + bool drawMiddle = true; + float leftBorder = (float)nPatchInfo.left; + float topBorder = (float)nPatchInfo.top; + float rightBorder = (float)nPatchInfo.right; + float bottomBorder = (float)nPatchInfo.bottom; + + // Adjust the lateral (left and right) border widths in case patchWidth < texture.width + if (patchWidth <= (leftBorder + rightBorder) && nPatchInfo.layout != NPATCH_THREE_PATCH_VERTICAL) + { + drawCenter = false; + leftBorder = (leftBorder/(leftBorder + rightBorder))*patchWidth; + rightBorder = patchWidth - leftBorder; + } + + // Adjust the lateral (top and bottom) border heights in case patchHeight < texture.height + if (patchHeight <= (topBorder + bottomBorder) && nPatchInfo.layout != NPATCH_THREE_PATCH_HORIZONTAL) + { + drawMiddle = false; + topBorder = (topBorder/(topBorder + bottomBorder))*patchHeight; + bottomBorder = patchHeight - topBorder; + } + + Vector2 vertA, vertB, vertC, vertD; + vertA.x = 0.0f; // outer left + vertA.y = 0.0f; // outer top + vertB.x = leftBorder; // inner left + vertB.y = topBorder; // inner top + vertC.x = patchWidth - rightBorder; // inner right + vertC.y = patchHeight - bottomBorder; // inner bottom + vertD.x = patchWidth; // outer right + vertD.y = patchHeight; // outer bottom + + Vector2 coordA, coordB, coordC, coordD; + coordA.x = nPatchInfo.source.x/width; + coordA.y = nPatchInfo.source.y/height; + coordB.x = (nPatchInfo.source.x + leftBorder)/width; + coordB.y = (nPatchInfo.source.y + topBorder)/height; + coordC.x = (nPatchInfo.source.x + nPatchInfo.source.width - rightBorder)/width; + coordC.y = (nPatchInfo.source.y + nPatchInfo.source.height - bottomBorder)/height; + coordD.x = (nPatchInfo.source.x + nPatchInfo.source.width)/width; + coordD.y = (nPatchInfo.source.y + nPatchInfo.source.height)/height; + + rlSetTexture(texture.id); + + rlPushMatrix(); + rlTranslatef(dest.x, dest.y, 0.0f); + rlRotatef(rotation, 0.0f, 0.0f, 1.0f); + rlTranslatef(-origin.x, -origin.y, 0.0f); + + rlBegin(RL_QUADS); + rlColor4ub(tint.r, tint.g, tint.b, tint.a); + rlNormal3f(0.0f, 0.0f, 1.0f); // Normal vector pointing towards viewer + + if (nPatchInfo.layout == NPATCH_NINE_PATCH) + { + // ------------------------------------------------------------ + // TOP-LEFT QUAD + rlTexCoord2f(coordA.x, coordB.y); rlVertex2f(vertA.x, vertB.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordB.x, coordB.y); rlVertex2f(vertB.x, vertB.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordB.x, coordA.y); rlVertex2f(vertB.x, vertA.y); // Top-right corner for texture and quad + rlTexCoord2f(coordA.x, coordA.y); rlVertex2f(vertA.x, vertA.y); // Top-left corner for texture and quad + if (drawCenter) + { + // TOP-CENTER QUAD + rlTexCoord2f(coordB.x, coordB.y); rlVertex2f(vertB.x, vertB.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordC.x, coordB.y); rlVertex2f(vertC.x, vertB.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordC.x, coordA.y); rlVertex2f(vertC.x, vertA.y); // Top-right corner for texture and quad + rlTexCoord2f(coordB.x, coordA.y); rlVertex2f(vertB.x, vertA.y); // Top-left corner for texture and quad + } + // TOP-RIGHT QUAD + rlTexCoord2f(coordC.x, coordB.y); rlVertex2f(vertC.x, vertB.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordD.x, coordB.y); rlVertex2f(vertD.x, vertB.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordD.x, coordA.y); rlVertex2f(vertD.x, vertA.y); // Top-right corner for texture and quad + rlTexCoord2f(coordC.x, coordA.y); rlVertex2f(vertC.x, vertA.y); // Top-left corner for texture and quad + if (drawMiddle) + { + // ------------------------------------------------------------ + // MIDDLE-LEFT QUAD + rlTexCoord2f(coordA.x, coordC.y); rlVertex2f(vertA.x, vertC.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordB.x, coordC.y); rlVertex2f(vertB.x, vertC.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordB.x, coordB.y); rlVertex2f(vertB.x, vertB.y); // Top-right corner for texture and quad + rlTexCoord2f(coordA.x, coordB.y); rlVertex2f(vertA.x, vertB.y); // Top-left corner for texture and quad + if (drawCenter) + { + // MIDDLE-CENTER QUAD + rlTexCoord2f(coordB.x, coordC.y); rlVertex2f(vertB.x, vertC.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordC.x, coordC.y); rlVertex2f(vertC.x, vertC.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordC.x, coordB.y); rlVertex2f(vertC.x, vertB.y); // Top-right corner for texture and quad + rlTexCoord2f(coordB.x, coordB.y); rlVertex2f(vertB.x, vertB.y); // Top-left corner for texture and quad + } + + // MIDDLE-RIGHT QUAD + rlTexCoord2f(coordC.x, coordC.y); rlVertex2f(vertC.x, vertC.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordD.x, coordC.y); rlVertex2f(vertD.x, vertC.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordD.x, coordB.y); rlVertex2f(vertD.x, vertB.y); // Top-right corner for texture and quad + rlTexCoord2f(coordC.x, coordB.y); rlVertex2f(vertC.x, vertB.y); // Top-left corner for texture and quad + } + + // ------------------------------------------------------------ + // BOTTOM-LEFT QUAD + rlTexCoord2f(coordA.x, coordD.y); rlVertex2f(vertA.x, vertD.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordB.x, coordD.y); rlVertex2f(vertB.x, vertD.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordB.x, coordC.y); rlVertex2f(vertB.x, vertC.y); // Top-right corner for texture and quad + rlTexCoord2f(coordA.x, coordC.y); rlVertex2f(vertA.x, vertC.y); // Top-left corner for texture and quad + if (drawCenter) + { + // BOTTOM-CENTER QUAD + rlTexCoord2f(coordB.x, coordD.y); rlVertex2f(vertB.x, vertD.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordC.x, coordD.y); rlVertex2f(vertC.x, vertD.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordC.x, coordC.y); rlVertex2f(vertC.x, vertC.y); // Top-right corner for texture and quad + rlTexCoord2f(coordB.x, coordC.y); rlVertex2f(vertB.x, vertC.y); // Top-left corner for texture and quad + } + + // BOTTOM-RIGHT QUAD + rlTexCoord2f(coordC.x, coordD.y); rlVertex2f(vertC.x, vertD.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordD.x, coordD.y); rlVertex2f(vertD.x, vertD.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordD.x, coordC.y); rlVertex2f(vertD.x, vertC.y); // Top-right corner for texture and quad + rlTexCoord2f(coordC.x, coordC.y); rlVertex2f(vertC.x, vertC.y); // Top-left corner for texture and quad + } + else if (nPatchInfo.layout == NPATCH_THREE_PATCH_VERTICAL) + { + // TOP QUAD + // ----------------------------------------------------------- + // Texture coords Vertices + rlTexCoord2f(coordA.x, coordB.y); rlVertex2f(vertA.x, vertB.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordD.x, coordB.y); rlVertex2f(vertD.x, vertB.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordD.x, coordA.y); rlVertex2f(vertD.x, vertA.y); // Top-right corner for texture and quad + rlTexCoord2f(coordA.x, coordA.y); rlVertex2f(vertA.x, vertA.y); // Top-left corner for texture and quad + if (drawCenter) + { + // MIDDLE QUAD + // ----------------------------------------------------------- + // Texture coords Vertices + rlTexCoord2f(coordA.x, coordC.y); rlVertex2f(vertA.x, vertC.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordD.x, coordC.y); rlVertex2f(vertD.x, vertC.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordD.x, coordB.y); rlVertex2f(vertD.x, vertB.y); // Top-right corner for texture and quad + rlTexCoord2f(coordA.x, coordB.y); rlVertex2f(vertA.x, vertB.y); // Top-left corner for texture and quad + } + // BOTTOM QUAD + // ----------------------------------------------------------- + // Texture coords Vertices + rlTexCoord2f(coordA.x, coordD.y); rlVertex2f(vertA.x, vertD.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordD.x, coordD.y); rlVertex2f(vertD.x, vertD.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordD.x, coordC.y); rlVertex2f(vertD.x, vertC.y); // Top-right corner for texture and quad + rlTexCoord2f(coordA.x, coordC.y); rlVertex2f(vertA.x, vertC.y); // Top-left corner for texture and quad + } + else if (nPatchInfo.layout == NPATCH_THREE_PATCH_HORIZONTAL) + { + // LEFT QUAD + // ----------------------------------------------------------- + // Texture coords Vertices + rlTexCoord2f(coordA.x, coordD.y); rlVertex2f(vertA.x, vertD.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordB.x, coordD.y); rlVertex2f(vertB.x, vertD.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordB.x, coordA.y); rlVertex2f(vertB.x, vertA.y); // Top-right corner for texture and quad + rlTexCoord2f(coordA.x, coordA.y); rlVertex2f(vertA.x, vertA.y); // Top-left corner for texture and quad + if (drawCenter) + { + // CENTER QUAD + // ----------------------------------------------------------- + // Texture coords Vertices + rlTexCoord2f(coordB.x, coordD.y); rlVertex2f(vertB.x, vertD.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordC.x, coordD.y); rlVertex2f(vertC.x, vertD.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordC.x, coordA.y); rlVertex2f(vertC.x, vertA.y); // Top-right corner for texture and quad + rlTexCoord2f(coordB.x, coordA.y); rlVertex2f(vertB.x, vertA.y); // Top-left corner for texture and quad + } + // RIGHT QUAD + // ----------------------------------------------------------- + // Texture coords Vertices + rlTexCoord2f(coordC.x, coordD.y); rlVertex2f(vertC.x, vertD.y); // Bottom-left corner for texture and quad + rlTexCoord2f(coordD.x, coordD.y); rlVertex2f(vertD.x, vertD.y); // Bottom-right corner for texture and quad + rlTexCoord2f(coordD.x, coordA.y); rlVertex2f(vertD.x, vertA.y); // Top-right corner for texture and quad + rlTexCoord2f(coordC.x, coordA.y); rlVertex2f(vertC.x, vertA.y); // Top-left corner for texture and quad + } + rlEnd(); + rlPopMatrix(); + + rlSetTexture(0); + } +} + +// Draw textured polygon, defined by vertex and texturecoordinates +// NOTE: Polygon center must have straight line path to all points +// without crossing perimeter, points must be in anticlockwise order +void DrawTexturePoly(Texture2D texture, Vector2 center, Vector2 *points, Vector2 *texcoords, int pointCount, Color tint) +{ + rlCheckRenderBatchLimit((pointCount - 1)*4); + + rlSetTexture(texture.id); + + // Texturing is only supported on QUADs + rlBegin(RL_QUADS); + + rlColor4ub(tint.r, tint.g, tint.b, tint.a); + + for (int i = 0; i < pointCount - 1; i++) + { + rlTexCoord2f(0.5f, 0.5f); + rlVertex2f(center.x, center.y); + + rlTexCoord2f(texcoords[i].x, texcoords[i].y); + rlVertex2f(points[i].x + center.x, points[i].y + center.y); + + rlTexCoord2f(texcoords[i + 1].x, texcoords[i + 1].y); + rlVertex2f(points[i + 1].x + center.x, points[i + 1].y + center.y); + + rlTexCoord2f(texcoords[i + 1].x, texcoords[i + 1].y); + rlVertex2f(points[i + 1].x + center.x, points[i + 1].y + center.y); + } + rlEnd(); + + rlSetTexture(0); +} + +// Get color with alpha applied, alpha goes from 0.0f to 1.0f +Color Fade(Color color, float alpha) +{ + if (alpha < 0.0f) alpha = 0.0f; + else if (alpha > 1.0f) alpha = 1.0f; + + return (Color){color.r, color.g, color.b, (unsigned char)(255.0f*alpha)}; +} + +// Get hexadecimal value for a Color +int ColorToInt(Color color) +{ + return (((int)color.r << 24) | ((int)color.g << 16) | ((int)color.b << 8) | (int)color.a); +} + +// Get color normalized as float [0..1] +Vector4 ColorNormalize(Color color) +{ + Vector4 result; + + result.x = (float)color.r/255.0f; + result.y = (float)color.g/255.0f; + result.z = (float)color.b/255.0f; + result.w = (float)color.a/255.0f; + + return result; +} + +// Get color from normalized values [0..1] +Color ColorFromNormalized(Vector4 normalized) +{ + Color result; + + result.r = (unsigned char)(normalized.x*255.0f); + result.g = (unsigned char)(normalized.y*255.0f); + result.b = (unsigned char)(normalized.z*255.0f); + result.a = (unsigned char)(normalized.w*255.0f); + + return result; +} + +// Get HSV values for a Color +// NOTE: Hue is returned as degrees [0..360] +Vector3 ColorToHSV(Color color) +{ + Vector3 hsv = { 0 }; + Vector3 rgb = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + float min, max, delta; + + min = rgb.x < rgb.y? rgb.x : rgb.y; + min = min < rgb.z? min : rgb.z; + + max = rgb.x > rgb.y? rgb.x : rgb.y; + max = max > rgb.z? max : rgb.z; + + hsv.z = max; // Value + delta = max - min; + + if (delta < 0.00001f) + { + hsv.y = 0.0f; + hsv.x = 0.0f; // Undefined, maybe NAN? + return hsv; + } + + if (max > 0.0f) + { + // NOTE: If max is 0, this divide would cause a crash + hsv.y = (delta/max); // Saturation + } + else + { + // NOTE: If max is 0, then r = g = b = 0, s = 0, h is undefined + hsv.y = 0.0f; + hsv.x = NAN; // Undefined + return hsv; + } + + // NOTE: Comparing float values could not work properly + if (rgb.x >= max) hsv.x = (rgb.y - rgb.z)/delta; // Between yellow & magenta + else + { + if (rgb.y >= max) hsv.x = 2.0f + (rgb.z - rgb.x)/delta; // Between cyan & yellow + else hsv.x = 4.0f + (rgb.x - rgb.y)/delta; // Between magenta & cyan + } + + hsv.x *= 60.0f; // Convert to degrees + + if (hsv.x < 0.0f) hsv.x += 360.0f; + + return hsv; +} + +// Get a Color from HSV values +// Implementation reference: https://en.wikipedia.org/wiki/HSL_and_HSV#Alternative_HSV_conversion +// NOTE: Color->HSV->Color conversion will not yield exactly the same color due to rounding errors +// Hue is provided in degrees: [0..360] +// Saturation/Value are provided normalized: [0.0f..1.0f] +Color ColorFromHSV(float hue, float saturation, float value) +{ + Color color = { 0, 0, 0, 255 }; + + // Red channel + float k = fmodf((5.0f + hue/60.0f), 6); + float t = 4.0f - k; + k = (t < k)? t : k; + k = (k < 1)? k : 1; + k = (k > 0)? k : 0; + color.r = (unsigned char)((value - value*saturation*k)*255.0f); + + // Green channel + k = fmodf((3.0f + hue/60.0f), 6); + t = 4.0f - k; + k = (t < k)? t : k; + k = (k < 1)? k : 1; + k = (k > 0)? k : 0; + color.g = (unsigned char)((value - value*saturation*k)*255.0f); + + // Blue channel + k = fmodf((1.0f + hue/60.0f), 6); + t = 4.0f - k; + k = (t < k)? t : k; + k = (k < 1)? k : 1; + k = (k > 0)? k : 0; + color.b = (unsigned char)((value - value*saturation*k)*255.0f); + + return color; +} + +// Get color with alpha applied, alpha goes from 0.0f to 1.0f +Color ColorAlpha(Color color, float alpha) +{ + if (alpha < 0.0f) alpha = 0.0f; + else if (alpha > 1.0f) alpha = 1.0f; + + return (Color){color.r, color.g, color.b, (unsigned char)(255.0f*alpha)}; +} + +// Get src alpha-blended into dst color with tint +Color ColorAlphaBlend(Color dst, Color src, Color tint) +{ + Color out = WHITE; + + // Apply color tint to source color + src.r = (unsigned char)(((unsigned int)src.r*(unsigned int)tint.r) >> 8); + src.g = (unsigned char)(((unsigned int)src.g*(unsigned int)tint.g) >> 8); + src.b = (unsigned char)(((unsigned int)src.b*(unsigned int)tint.b) >> 8); + src.a = (unsigned char)(((unsigned int)src.a*(unsigned int)tint.a) >> 8); + +//#define COLORALPHABLEND_FLOAT +#define COLORALPHABLEND_INTEGERS +#if defined(COLORALPHABLEND_INTEGERS) + if (src.a == 0) out = dst; + else if (src.a == 255) out = src; + else + { + unsigned int alpha = (unsigned int)src.a + 1; // We are shifting by 8 (dividing by 256), so we need to take that excess into account + out.a = (unsigned char)(((unsigned int)alpha*256 + (unsigned int)dst.a*(256 - alpha)) >> 8); + + if (out.a > 0) + { + out.r = (unsigned char)((((unsigned int)src.r*alpha*256 + (unsigned int)dst.r*(unsigned int)dst.a*(256 - alpha))/out.a) >> 8); + out.g = (unsigned char)((((unsigned int)src.g*alpha*256 + (unsigned int)dst.g*(unsigned int)dst.a*(256 - alpha))/out.a) >> 8); + out.b = (unsigned char)((((unsigned int)src.b*alpha*256 + (unsigned int)dst.b*(unsigned int)dst.a*(256 - alpha))/out.a) >> 8); + } + } +#endif +#if defined(COLORALPHABLEND_FLOAT) + if (src.a == 0) out = dst; + else if (src.a == 255) out = src; + else + { + Vector4 fdst = ColorNormalize(dst); + Vector4 fsrc = ColorNormalize(src); + Vector4 ftint = ColorNormalize(tint); + Vector4 fout = { 0 }; + + fout.w = fsrc.w + fdst.w*(1.0f - fsrc.w); + + if (fout.w > 0.0f) + { + fout.x = (fsrc.x*fsrc.w + fdst.x*fdst.w*(1 - fsrc.w))/fout.w; + fout.y = (fsrc.y*fsrc.w + fdst.y*fdst.w*(1 - fsrc.w))/fout.w; + fout.z = (fsrc.z*fsrc.w + fdst.z*fdst.w*(1 - fsrc.w))/fout.w; + } + + out = (Color){ (unsigned char)(fout.x*255.0f), (unsigned char)(fout.y*255.0f), (unsigned char)(fout.z*255.0f), (unsigned char)(fout.w*255.0f) }; + } +#endif + + return out; +} + +// Get a Color struct from hexadecimal value +Color GetColor(unsigned int hexValue) +{ + Color color; + + color.r = (unsigned char)(hexValue >> 24) & 0xFF; + color.g = (unsigned char)(hexValue >> 16) & 0xFF; + color.b = (unsigned char)(hexValue >> 8) & 0xFF; + color.a = (unsigned char)hexValue & 0xFF; + + return color; +} + +// Get color from a pixel from certain format +Color GetPixelColor(void *srcPtr, int format) +{ + Color color = { 0 }; + + switch (format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: color = (Color){ ((unsigned char *)srcPtr)[0], ((unsigned char *)srcPtr)[0], ((unsigned char *)srcPtr)[0], 255 }; break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: color = (Color){ ((unsigned char *)srcPtr)[0], ((unsigned char *)srcPtr)[0], ((unsigned char *)srcPtr)[0], ((unsigned char *)srcPtr)[1] }; break; + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + { + color.r = (unsigned char)((((unsigned short *)srcPtr)[0] >> 11)*255/31); + color.g = (unsigned char)(((((unsigned short *)srcPtr)[0] >> 5) & 0b0000000000111111)*255/63); + color.b = (unsigned char)((((unsigned short *)srcPtr)[0] & 0b0000000000011111)*255/31); + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + color.r = (unsigned char)((((unsigned short *)srcPtr)[0] >> 11)*255/31); + color.g = (unsigned char)(((((unsigned short *)srcPtr)[0] >> 6) & 0b0000000000011111)*255/31); + color.b = (unsigned char)((((unsigned short *)srcPtr)[0] & 0b0000000000011111)*255/31); + color.a = (((unsigned short *)srcPtr)[0] & 0b0000000000000001)? 255 : 0; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + color.r = (unsigned char)((((unsigned short *)srcPtr)[0] >> 12)*255/15); + color.g = (unsigned char)(((((unsigned short *)srcPtr)[0] >> 8) & 0b0000000000001111)*255/15); + color.b = (unsigned char)(((((unsigned short *)srcPtr)[0] >> 4) & 0b0000000000001111)*255/15); + color.a = (unsigned char)((((unsigned short *)srcPtr)[0] & 0b0000000000001111)*255/15); + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: color = (Color){ ((unsigned char *)srcPtr)[0], ((unsigned char *)srcPtr)[1], ((unsigned char *)srcPtr)[2], ((unsigned char *)srcPtr)[3] }; break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: color = (Color){ ((unsigned char *)srcPtr)[0], ((unsigned char *)srcPtr)[1], ((unsigned char *)srcPtr)[2], 255 }; break; + case PIXELFORMAT_UNCOMPRESSED_R32: + { + // NOTE: Pixel normalized float value is converted to [0..255] + color.r = (unsigned char)(((float *)srcPtr)[0]*255.0f); + color.g = (unsigned char)(((float *)srcPtr)[0]*255.0f); + color.b = (unsigned char)(((float *)srcPtr)[0]*255.0f); + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32: + { + // NOTE: Pixel normalized float value is converted to [0..255] + color.r = (unsigned char)(((float *)srcPtr)[0]*255.0f); + color.g = (unsigned char)(((float *)srcPtr)[1]*255.0f); + color.b = (unsigned char)(((float *)srcPtr)[2]*255.0f); + color.a = 255; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: + { + // NOTE: Pixel normalized float value is converted to [0..255] + color.r = (unsigned char)(((float *)srcPtr)[0]*255.0f); + color.g = (unsigned char)(((float *)srcPtr)[1]*255.0f); + color.b = (unsigned char)(((float *)srcPtr)[2]*255.0f); + color.a = (unsigned char)(((float *)srcPtr)[3]*255.0f); + + } break; + default: break; + } + + return color; +} + +// Set pixel color formatted into destination pointer +void SetPixelColor(void *dstPtr, Color color, int format) +{ + switch (format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: + { + // NOTE: Calculate grayscale equivalent color + Vector3 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + unsigned char gray = (unsigned char)((coln.x*0.299f + coln.y*0.587f + coln.z*0.114f)*255.0f); + + ((unsigned char *)dstPtr)[0] = gray; + + } break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + { + // NOTE: Calculate grayscale equivalent color + Vector3 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + unsigned char gray = (unsigned char)((coln.x*0.299f + coln.y*0.587f + coln.z*0.114f)*255.0f); + + ((unsigned char *)dstPtr)[0] = gray; + ((unsigned char *)dstPtr)[1] = color.a; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + { + // NOTE: Calculate R5G6B5 equivalent color + Vector3 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f }; + + unsigned char r = (unsigned char)(round(coln.x*31.0f)); + unsigned char g = (unsigned char)(round(coln.y*63.0f)); + unsigned char b = (unsigned char)(round(coln.z*31.0f)); + + ((unsigned short *)dstPtr)[0] = (unsigned short)r << 11 | (unsigned short)g << 5 | (unsigned short)b; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + // NOTE: Calculate R5G5B5A1 equivalent color + Vector4 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f, (float)color.a/255.0f }; + + unsigned char r = (unsigned char)(round(coln.x*31.0f)); + unsigned char g = (unsigned char)(round(coln.y*31.0f)); + unsigned char b = (unsigned char)(round(coln.z*31.0f)); + unsigned char a = (coln.w > ((float)PIXELFORMAT_UNCOMPRESSED_R5G5B5A1_ALPHA_THRESHOLD/255.0f))? 1 : 0; + + ((unsigned short *)dstPtr)[0] = (unsigned short)r << 11 | (unsigned short)g << 6 | (unsigned short)b << 1 | (unsigned short)a; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + // NOTE: Calculate R5G5B5A1 equivalent color + Vector4 coln = { (float)color.r/255.0f, (float)color.g/255.0f, (float)color.b/255.0f, (float)color.a/255.0f }; + + unsigned char r = (unsigned char)(round(coln.x*15.0f)); + unsigned char g = (unsigned char)(round(coln.y*15.0f)); + unsigned char b = (unsigned char)(round(coln.z*15.0f)); + unsigned char a = (unsigned char)(round(coln.w*15.0f)); + + ((unsigned short *)dstPtr)[0] = (unsigned short)r << 12 | (unsigned short)g << 8 | (unsigned short)b << 4 | (unsigned short)a; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: + { + ((unsigned char *)dstPtr)[0] = color.r; + ((unsigned char *)dstPtr)[1] = color.g; + ((unsigned char *)dstPtr)[2] = color.b; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: + { + ((unsigned char *)dstPtr)[0] = color.r; + ((unsigned char *)dstPtr)[1] = color.g; + ((unsigned char *)dstPtr)[2] = color.b; + ((unsigned char *)dstPtr)[3] = color.a; + + } break; + default: break; + } +} + +// Get pixel data size in bytes for certain format +// NOTE: Size can be requested for Image or Texture data +int GetPixelDataSize(int width, int height, int format) +{ + int dataSize = 0; // Size in bytes + int bpp = 0; // Bits per pixel + + switch (format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: bpp = 8; break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: bpp = 16; break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: bpp = 32; break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: bpp = 24; break; + case PIXELFORMAT_UNCOMPRESSED_R32: bpp = 32; break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32: bpp = 32*3; break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: bpp = 32*4; break; + case PIXELFORMAT_COMPRESSED_DXT1_RGB: + case PIXELFORMAT_COMPRESSED_DXT1_RGBA: + case PIXELFORMAT_COMPRESSED_ETC1_RGB: + case PIXELFORMAT_COMPRESSED_ETC2_RGB: + case PIXELFORMAT_COMPRESSED_PVRT_RGB: + case PIXELFORMAT_COMPRESSED_PVRT_RGBA: bpp = 4; break; + case PIXELFORMAT_COMPRESSED_DXT3_RGBA: + case PIXELFORMAT_COMPRESSED_DXT5_RGBA: + case PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA: + case PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA: bpp = 8; break; + case PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA: bpp = 2; break; + default: break; + } + + dataSize = width*height*bpp/8; // Total data size in bytes + + // Most compressed formats works on 4x4 blocks, + // if texture is smaller, minimum dataSize is 8 or 16 + if ((width < 4) && (height < 4)) + { + if ((format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) && (format < PIXELFORMAT_COMPRESSED_DXT3_RGBA)) dataSize = 8; + else if ((format >= PIXELFORMAT_COMPRESSED_DXT3_RGBA) && (format < PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA)) dataSize = 16; + } + + return dataSize; +} + +//---------------------------------------------------------------------------------- +// Module specific Functions Definition +//---------------------------------------------------------------------------------- +#if defined(SUPPORT_FILEFORMAT_DDS) +// Loading DDS image data (compressed or uncompressed) +static Image LoadDDS(const unsigned char *fileData, unsigned int fileSize) +{ + unsigned char *fileDataPtr = (unsigned char *)fileData; + + // Required extension: + // GL_EXT_texture_compression_s3tc + + // Supported tokens (defined by extensions) + // GL_COMPRESSED_RGB_S3TC_DXT1_EXT 0x83F0 + // GL_COMPRESSED_RGBA_S3TC_DXT1_EXT 0x83F1 + // GL_COMPRESSED_RGBA_S3TC_DXT3_EXT 0x83F2 + // GL_COMPRESSED_RGBA_S3TC_DXT5_EXT 0x83F3 + + #define FOURCC_DXT1 0x31545844 // Equivalent to "DXT1" in ASCII + #define FOURCC_DXT3 0x33545844 // Equivalent to "DXT3" in ASCII + #define FOURCC_DXT5 0x35545844 // Equivalent to "DXT5" in ASCII + + // DDS Pixel Format + typedef struct { + unsigned int size; + unsigned int flags; + unsigned int fourCC; + unsigned int rgbBitCount; + unsigned int rBitMask; + unsigned int gBitMask; + unsigned int bBitMask; + unsigned int aBitMask; + } DDSPixelFormat; + + // DDS Header (124 bytes) + typedef struct { + unsigned int size; + unsigned int flags; + unsigned int height; + unsigned int width; + unsigned int pitchOrLinearSize; + unsigned int depth; + unsigned int mipmapCount; + unsigned int reserved1[11]; + DDSPixelFormat ddspf; + unsigned int caps; + unsigned int caps2; + unsigned int caps3; + unsigned int caps4; + unsigned int reserved2; + } DDSHeader; + + Image image = { 0 }; + + if (fileDataPtr != NULL) + { + // Verify the type of file + unsigned char *ddsHeaderId = fileDataPtr; + fileDataPtr += 4; + + if ((ddsHeaderId[0] != 'D') || (ddsHeaderId[1] != 'D') || (ddsHeaderId[2] != 'S') || (ddsHeaderId[3] != ' ')) + { + TRACELOG(LOG_WARNING, "IMAGE: DDS file data not valid"); + } + else + { + DDSHeader *ddsHeader = (DDSHeader *)fileDataPtr; + + TRACELOGD("IMAGE: DDS file data info:"); + TRACELOGD(" > Header size: %i", sizeof(DDSHeader)); + TRACELOGD(" > Pixel format size: %i", ddsHeader->ddspf.size); + TRACELOGD(" > Pixel format flags: 0x%x", ddsHeader->ddspf.flags); + TRACELOGD(" > File format: 0x%x", ddsHeader->ddspf.fourCC); + TRACELOGD(" > File bit count: 0x%x", ddsHeader->ddspf.rgbBitCount); + + fileDataPtr += sizeof(DDSHeader); // Skip header + + image.width = ddsHeader->width; + image.height = ddsHeader->height; + + if (ddsHeader->mipmapCount == 0) image.mipmaps = 1; // Parameter not used + else image.mipmaps = ddsHeader->mipmapCount; + + if (ddsHeader->ddspf.rgbBitCount == 16) // 16bit mode, no compressed + { + if (ddsHeader->ddspf.flags == 0x40) // no alpha channel + { + int dataSize = image.width*image.height*sizeof(unsigned short); + image.data = (unsigned short *)RL_MALLOC(dataSize); + + memcpy(image.data, fileDataPtr, dataSize); + + image.format = PIXELFORMAT_UNCOMPRESSED_R5G6B5; + } + else if (ddsHeader->ddspf.flags == 0x41) // with alpha channel + { + if (ddsHeader->ddspf.aBitMask == 0x8000) // 1bit alpha + { + int dataSize = image.width*image.height*sizeof(unsigned short); + image.data = (unsigned short *)RL_MALLOC(dataSize); + + memcpy(image.data, fileDataPtr, dataSize); + + unsigned char alpha = 0; + + // NOTE: Data comes as A1R5G5B5, it must be reordered to R5G5B5A1 + for (int i = 0; i < image.width*image.height; i++) + { + alpha = ((unsigned short *)image.data)[i] >> 15; + ((unsigned short *)image.data)[i] = ((unsigned short *)image.data)[i] << 1; + ((unsigned short *)image.data)[i] += alpha; + } + + image.format = PIXELFORMAT_UNCOMPRESSED_R5G5B5A1; + } + else if (ddsHeader->ddspf.aBitMask == 0xf000) // 4bit alpha + { + int dataSize = image.width*image.height*sizeof(unsigned short); + image.data = (unsigned short *)RL_MALLOC(dataSize); + + memcpy(image.data, fileDataPtr, dataSize); + + unsigned char alpha = 0; + + // NOTE: Data comes as A4R4G4B4, it must be reordered R4G4B4A4 + for (int i = 0; i < image.width*image.height; i++) + { + alpha = ((unsigned short *)image.data)[i] >> 12; + ((unsigned short *)image.data)[i] = ((unsigned short *)image.data)[i] << 4; + ((unsigned short *)image.data)[i] += alpha; + } + + image.format = PIXELFORMAT_UNCOMPRESSED_R4G4B4A4; + } + } + } + else if (ddsHeader->ddspf.flags == 0x40 && ddsHeader->ddspf.rgbBitCount == 24) // DDS_RGB, no compressed + { + int dataSize = image.width*image.height*3*sizeof(unsigned char); + image.data = (unsigned short *)RL_MALLOC(dataSize); + + memcpy(image.data, fileDataPtr, dataSize); + + image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8; + } + else if (ddsHeader->ddspf.flags == 0x41 && ddsHeader->ddspf.rgbBitCount == 32) // DDS_RGBA, no compressed + { + int dataSize = image.width*image.height*4*sizeof(unsigned char); + image.data = (unsigned short *)RL_MALLOC(dataSize); + + memcpy(image.data, fileDataPtr, dataSize); + + unsigned char blue = 0; + + // NOTE: Data comes as A8R8G8B8, it must be reordered R8G8B8A8 (view next comment) + // DirecX understand ARGB as a 32bit DWORD but the actual memory byte alignment is BGRA + // So, we must realign B8G8R8A8 to R8G8B8A8 + for (int i = 0; i < image.width*image.height*4; i += 4) + { + blue = ((unsigned char *)image.data)[i]; + ((unsigned char *)image.data)[i] = ((unsigned char *)image.data)[i + 2]; + ((unsigned char *)image.data)[i + 2] = blue; + } + + image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + } + else if (((ddsHeader->ddspf.flags == 0x04) || (ddsHeader->ddspf.flags == 0x05)) && (ddsHeader->ddspf.fourCC > 0)) // Compressed + { + int dataSize = 0; + + // Calculate data size, including all mipmaps + if (ddsHeader->mipmapCount > 1) dataSize = ddsHeader->pitchOrLinearSize*2; + else dataSize = ddsHeader->pitchOrLinearSize; + + image.data = (unsigned char *)RL_MALLOC(dataSize*sizeof(unsigned char)); + + memcpy(image.data, fileDataPtr, dataSize); + + switch (ddsHeader->ddspf.fourCC) + { + case FOURCC_DXT1: + { + if (ddsHeader->ddspf.flags == 0x04) image.format = PIXELFORMAT_COMPRESSED_DXT1_RGB; + else image.format = PIXELFORMAT_COMPRESSED_DXT1_RGBA; + } break; + case FOURCC_DXT3: image.format = PIXELFORMAT_COMPRESSED_DXT3_RGBA; break; + case FOURCC_DXT5: image.format = PIXELFORMAT_COMPRESSED_DXT5_RGBA; break; + default: break; + } + } + } + } + + return image; +} +#endif + +#if defined(SUPPORT_FILEFORMAT_PKM) +// Loading PKM image data (ETC1/ETC2 compression) +// NOTE: KTX is the standard Khronos Group compression format (ETC1/ETC2, mipmaps) +// PKM is a much simpler file format used mainly to contain a single ETC1/ETC2 compressed image (no mipmaps) +static Image LoadPKM(const unsigned char *fileData, unsigned int fileSize) +{ + unsigned char *fileDataPtr = (unsigned char *)fileData; + + // Required extensions: + // GL_OES_compressed_ETC1_RGB8_texture (ETC1) (OpenGL ES 2.0) + // GL_ARB_ES3_compatibility (ETC2/EAC) (OpenGL ES 3.0) + + // Supported tokens (defined by extensions) + // GL_ETC1_RGB8_OES 0x8D64 + // GL_COMPRESSED_RGB8_ETC2 0x9274 + // GL_COMPRESSED_RGBA8_ETC2_EAC 0x9278 + + // PKM file (ETC1) Header (16 bytes) + typedef struct { + char id[4]; // "PKM " + char version[2]; // "10" or "20" + unsigned short format; // Data format (big-endian) (Check list below) + unsigned short width; // Texture width (big-endian) (origWidth rounded to multiple of 4) + unsigned short height; // Texture height (big-endian) (origHeight rounded to multiple of 4) + unsigned short origWidth; // Original width (big-endian) + unsigned short origHeight; // Original height (big-endian) + } PKMHeader; + + // Formats list + // version 10: format: 0=ETC1_RGB, [1=ETC1_RGBA, 2=ETC1_RGB_MIP, 3=ETC1_RGBA_MIP] (not used) + // version 20: format: 0=ETC1_RGB, 1=ETC2_RGB, 2=ETC2_RGBA_OLD, 3=ETC2_RGBA, 4=ETC2_RGBA1, 5=ETC2_R, 6=ETC2_RG, 7=ETC2_SIGNED_R, 8=ETC2_SIGNED_R + + // NOTE: The extended width and height are the widths rounded up to a multiple of 4. + // NOTE: ETC is always 4bit per pixel (64 bit for each 4x4 block of pixels) + + Image image = { 0 }; + + if (fileDataPtr != NULL) + { + PKMHeader *pkmHeader = (PKMHeader *)fileDataPtr; + + if ((pkmHeader->id[0] != 'P') || (pkmHeader->id[1] != 'K') || (pkmHeader->id[2] != 'M') || (pkmHeader->id[3] != ' ')) + { + TRACELOG(LOG_WARNING, "IMAGE: PKM file data not valid"); + } + else + { + fileDataPtr += sizeof(PKMHeader); // Skip header + + // NOTE: format, width and height come as big-endian, data must be swapped to little-endian + pkmHeader->format = ((pkmHeader->format & 0x00FF) << 8) | ((pkmHeader->format & 0xFF00) >> 8); + pkmHeader->width = ((pkmHeader->width & 0x00FF) << 8) | ((pkmHeader->width & 0xFF00) >> 8); + pkmHeader->height = ((pkmHeader->height & 0x00FF) << 8) | ((pkmHeader->height & 0xFF00) >> 8); + + TRACELOGD("IMAGE: PKM file data info:"); + TRACELOGD(" > Image width: %i", pkmHeader->width); + TRACELOGD(" > Image height: %i", pkmHeader->height); + TRACELOGD(" > Image format: %i", pkmHeader->format); + + image.width = pkmHeader->width; + image.height = pkmHeader->height; + image.mipmaps = 1; + + int bpp = 4; + if (pkmHeader->format == 3) bpp = 8; + + int dataSize = image.width*image.height*bpp/8; // Total data size in bytes + + image.data = (unsigned char *)RL_MALLOC(dataSize*sizeof(unsigned char)); + + memcpy(image.data, fileDataPtr, dataSize); + + if (pkmHeader->format == 0) image.format = PIXELFORMAT_COMPRESSED_ETC1_RGB; + else if (pkmHeader->format == 1) image.format = PIXELFORMAT_COMPRESSED_ETC2_RGB; + else if (pkmHeader->format == 3) image.format = PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA; + } + } + + return image; +} +#endif + +#if defined(SUPPORT_FILEFORMAT_KTX) +// Load KTX compressed image data (ETC1/ETC2 compression) +// TODO: Review KTX loading, many things changed! +static Image LoadKTX(const unsigned char *fileData, unsigned int fileSize) +{ + unsigned char *fileDataPtr = (unsigned char *)fileData; + + // Required extensions: + // GL_OES_compressed_ETC1_RGB8_texture (ETC1) + // GL_ARB_ES3_compatibility (ETC2/EAC) + + // Supported tokens (defined by extensions) + // GL_ETC1_RGB8_OES 0x8D64 + // GL_COMPRESSED_RGB8_ETC2 0x9274 + // GL_COMPRESSED_RGBA8_ETC2_EAC 0x9278 + + // KTX file Header (64 bytes) + // v1.1 - https://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec/ + // v2.0 - http://github.khronos.org/KTX-Specification/ + + // TODO: Support KTX 2.2 specs! + + typedef struct { + char id[12]; // Identifier: "«KTX 11»\r\n\x1A\n" + unsigned int endianness; // Little endian: 0x01 0x02 0x03 0x04 + unsigned int glType; // For compressed textures, glType must equal 0 + unsigned int glTypeSize; // For compressed texture data, usually 1 + unsigned int glFormat; // For compressed textures is 0 + unsigned int glInternalFormat; // Compressed internal format + unsigned int glBaseInternalFormat; // Same as glFormat (RGB, RGBA, ALPHA...) + unsigned int width; // Texture image width in pixels + unsigned int height; // Texture image height in pixels + unsigned int depth; // For 2D textures is 0 + unsigned int elements; // Number of array elements, usually 0 + unsigned int faces; // Cubemap faces, for no-cubemap = 1 + unsigned int mipmapLevels; // Non-mipmapped textures = 1 + unsigned int keyValueDataSize; // Used to encode any arbitrary data... + } KTXHeader; + + // NOTE: Before start of every mipmap data block, we have: unsigned int dataSize + + Image image = { 0 }; + + if (fileDataPtr != NULL) + { + KTXHeader *ktxHeader = (KTXHeader *)fileDataPtr; + + if ((ktxHeader->id[1] != 'K') || (ktxHeader->id[2] != 'T') || (ktxHeader->id[3] != 'X') || + (ktxHeader->id[4] != ' ') || (ktxHeader->id[5] != '1') || (ktxHeader->id[6] != '1')) + { + TRACELOG(LOG_WARNING, "IMAGE: KTX file data not valid"); + } + else + { + fileDataPtr += sizeof(KTXHeader); // Move file data pointer + + image.width = ktxHeader->width; + image.height = ktxHeader->height; + image.mipmaps = ktxHeader->mipmapLevels; + + TRACELOGD("IMAGE: KTX file data info:"); + TRACELOGD(" > Image width: %i", ktxHeader->width); + TRACELOGD(" > Image height: %i", ktxHeader->height); + TRACELOGD(" > Image format: 0x%x", ktxHeader->glInternalFormat); + + fileDataPtr += ktxHeader->keyValueDataSize; // Skip value data size + + int dataSize = ((int *)fileDataPtr)[0]; + fileDataPtr += sizeof(int); + + image.data = (unsigned char *)RL_MALLOC(dataSize*sizeof(unsigned char)); + + memcpy(image.data, fileDataPtr, dataSize); + + if (ktxHeader->glInternalFormat == 0x8D64) image.format = PIXELFORMAT_COMPRESSED_ETC1_RGB; + else if (ktxHeader->glInternalFormat == 0x9274) image.format = PIXELFORMAT_COMPRESSED_ETC2_RGB; + else if (ktxHeader->glInternalFormat == 0x9278) image.format = PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA; + + // TODO: Support uncompressed data formats? Right now it returns format = 0! + } + } + + return image; +} + +// Save image data as KTX file +// NOTE: By default KTX 1.1 spec is used, 2.0 is still on draft (01Oct2018) +// TODO: Review KTX saving, many things changed! +static int SaveKTX(Image image, const char *fileName) +{ + // KTX file Header (64 bytes) + // v1.1 - https://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec/ + // v2.0 - http://github.khronos.org/KTX-Specification/ - Final specs by 2021-04-18 + typedef struct { + char id[12]; // Identifier: "«KTX 11»\r\n\x1A\n" // KTX 2.0: "«KTX 22»\r\n\x1A\n" + unsigned int endianness; // Little endian: 0x01 0x02 0x03 0x04 + unsigned int glType; // For compressed textures, glType must equal 0 + unsigned int glTypeSize; // For compressed texture data, usually 1 + unsigned int glFormat; // For compressed textures is 0 + unsigned int glInternalFormat; // Compressed internal format + unsigned int glBaseInternalFormat; // Same as glFormat (RGB, RGBA, ALPHA...) // KTX 2.0: UInt32 vkFormat + unsigned int width; // Texture image width in pixels + unsigned int height; // Texture image height in pixels + unsigned int depth; // For 2D textures is 0 + unsigned int elements; // Number of array elements, usually 0 + unsigned int faces; // Cubemap faces, for no-cubemap = 1 + unsigned int mipmapLevels; // Non-mipmapped textures = 1 + unsigned int keyValueDataSize; // Used to encode any arbitrary data... // KTX 2.0: UInt32 levelOrder - ordering of the mipmap levels, usually 0 + // KTX 2.0: UInt32 supercompressionScheme - 0 (None), 1 (Crunch CRN), 2 (Zlib DEFLATE)... + // KTX 2.0 defines additional header elements... + } KTXHeader; + + // Calculate file dataSize required + int dataSize = sizeof(KTXHeader); + + for (int i = 0, width = image.width, height = image.height; i < image.mipmaps; i++) + { + dataSize += GetPixelDataSize(width, height, image.format); + width /= 2; height /= 2; + } + + unsigned char *fileData = RL_CALLOC(dataSize, 1); + unsigned char *fileDataPtr = fileData; + + KTXHeader ktxHeader = { 0 }; + + // KTX identifier (v1.1) + //unsigned char id[12] = { '«', 'K', 'T', 'X', ' ', '1', '1', '»', '\r', '\n', '\x1A', '\n' }; + //unsigned char id[12] = { 0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A }; + + const char ktxIdentifier[12] = { 0xAB, 'K', 'T', 'X', ' ', '1', '1', 0xBB, '\r', '\n', 0x1A, '\n' }; + + // Get the image header + memcpy(ktxHeader.id, ktxIdentifier, 12); // KTX 1.1 signature + ktxHeader.endianness = 0; + ktxHeader.glType = 0; // Obtained from image.format + ktxHeader.glTypeSize = 1; + ktxHeader.glFormat = 0; // Obtained from image.format + ktxHeader.glInternalFormat = 0; // Obtained from image.format + ktxHeader.glBaseInternalFormat = 0; + ktxHeader.width = image.width; + ktxHeader.height = image.height; + ktxHeader.depth = 0; + ktxHeader.elements = 0; + ktxHeader.faces = 1; + ktxHeader.mipmapLevels = image.mipmaps; // If it was 0, it means mipmaps should be generated on loading (not for compressed formats) + ktxHeader.keyValueDataSize = 0; // No extra data after the header + + rlGetGlTextureFormats(image.format, &ktxHeader.glInternalFormat, &ktxHeader.glFormat, &ktxHeader.glType); // rlgl module function + ktxHeader.glBaseInternalFormat = ktxHeader.glFormat; // KTX 1.1 only + + // NOTE: We can save into a .ktx all PixelFormats supported by raylib, including compressed formats like DXT, ETC or ASTC + + if (ktxHeader.glFormat == -1) TRACELOG(LOG_WARNING, "IMAGE: GL format not supported for KTX export (%i)", ktxHeader.glFormat); + else + { + memcpy(fileDataPtr, &ktxHeader, sizeof(KTXHeader)); + fileDataPtr += sizeof(KTXHeader); + + int width = image.width; + int height = image.height; + int dataOffset = 0; + + // Save all mipmaps data + for (int i = 0; i < image.mipmaps; i++) + { + unsigned int dataSize = GetPixelDataSize(width, height, image.format); + + memcpy(fileDataPtr, &dataSize, sizeof(unsigned int)); + memcpy(fileDataPtr + 4, (unsigned char *)image.data + dataOffset, dataSize); + + width /= 2; + height /= 2; + dataOffset += dataSize; + fileDataPtr += (4 + dataSize); + } + } + + int success = SaveFileData(fileName, fileData, dataSize); + + RL_FREE(fileData); // Free file data buffer + + // If all data has been written correctly to file, success = 1 + return success; +} +#endif + +#if defined(SUPPORT_FILEFORMAT_PVR) +// Loading PVR image data (uncompressed or PVRT compression) +// NOTE: PVR v2 not supported, use PVR v3 instead +static Image LoadPVR(const unsigned char *fileData, unsigned int fileSize) +{ + unsigned char *fileDataPtr = (unsigned char *)fileData; + + // Required extension: + // GL_IMG_texture_compression_pvrtc + + // Supported tokens (defined by extensions) + // GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG 0x8C00 + // GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG 0x8C02 + +#if 0 // Not used... + // PVR file v2 Header (52 bytes) + typedef struct { + unsigned int headerLength; + unsigned int height; + unsigned int width; + unsigned int numMipmaps; + unsigned int flags; + unsigned int dataLength; + unsigned int bpp; + unsigned int bitmaskRed; + unsigned int bitmaskGreen; + unsigned int bitmaskBlue; + unsigned int bitmaskAlpha; + unsigned int pvrTag; + unsigned int numSurfs; + } PVRHeaderV2; +#endif + + // PVR file v3 Header (52 bytes) + // NOTE: After it could be metadata (15 bytes?) + typedef struct { + char id[4]; + unsigned int flags; + unsigned char channels[4]; // pixelFormat high part + unsigned char channelDepth[4]; // pixelFormat low part + unsigned int colourSpace; + unsigned int channelType; + unsigned int height; + unsigned int width; + unsigned int depth; + unsigned int numSurfaces; + unsigned int numFaces; + unsigned int numMipmaps; + unsigned int metaDataSize; + } PVRHeaderV3; + +#if 0 // Not used... + // Metadata (usually 15 bytes) + typedef struct { + unsigned int devFOURCC; + unsigned int key; + unsigned int dataSize; // Not used? + unsigned char *data; // Not used? + } PVRMetadata; +#endif + + Image image = { 0 }; + + if (fileDataPtr != NULL) + { + // Check PVR image version + unsigned char pvrVersion = fileDataPtr[0]; + + // Load different PVR data formats + if (pvrVersion == 0x50) + { + PVRHeaderV3 *pvrHeader = (PVRHeaderV3 *)fileDataPtr; + + if ((pvrHeader->id[0] != 'P') || (pvrHeader->id[1] != 'V') || (pvrHeader->id[2] != 'R') || (pvrHeader->id[3] != 3)) + { + TRACELOG(LOG_WARNING, "IMAGE: PVR file data not valid"); + } + else + { + fileDataPtr += sizeof(PVRHeaderV3); // Skip header + + image.width = pvrHeader->width; + image.height = pvrHeader->height; + image.mipmaps = pvrHeader->numMipmaps; + + // Check data format + if (((pvrHeader->channels[0] == 'l') && (pvrHeader->channels[1] == 0)) && (pvrHeader->channelDepth[0] == 8)) image.format = PIXELFORMAT_UNCOMPRESSED_GRAYSCALE; + else if (((pvrHeader->channels[0] == 'l') && (pvrHeader->channels[1] == 'a')) && ((pvrHeader->channelDepth[0] == 8) && (pvrHeader->channelDepth[1] == 8))) image.format = PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA; + else if ((pvrHeader->channels[0] == 'r') && (pvrHeader->channels[1] == 'g') && (pvrHeader->channels[2] == 'b')) + { + if (pvrHeader->channels[3] == 'a') + { + if ((pvrHeader->channelDepth[0] == 5) && (pvrHeader->channelDepth[1] == 5) && (pvrHeader->channelDepth[2] == 5) && (pvrHeader->channelDepth[3] == 1)) image.format = PIXELFORMAT_UNCOMPRESSED_R5G5B5A1; + else if ((pvrHeader->channelDepth[0] == 4) && (pvrHeader->channelDepth[1] == 4) && (pvrHeader->channelDepth[2] == 4) && (pvrHeader->channelDepth[3] == 4)) image.format = PIXELFORMAT_UNCOMPRESSED_R4G4B4A4; + else if ((pvrHeader->channelDepth[0] == 8) && (pvrHeader->channelDepth[1] == 8) && (pvrHeader->channelDepth[2] == 8) && (pvrHeader->channelDepth[3] == 8)) image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + } + else if (pvrHeader->channels[3] == 0) + { + if ((pvrHeader->channelDepth[0] == 5) && (pvrHeader->channelDepth[1] == 6) && (pvrHeader->channelDepth[2] == 5)) image.format = PIXELFORMAT_UNCOMPRESSED_R5G6B5; + else if ((pvrHeader->channelDepth[0] == 8) && (pvrHeader->channelDepth[1] == 8) && (pvrHeader->channelDepth[2] == 8)) image.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8; + } + } + else if (pvrHeader->channels[0] == 2) image.format = PIXELFORMAT_COMPRESSED_PVRT_RGB; + else if (pvrHeader->channels[0] == 3) image.format = PIXELFORMAT_COMPRESSED_PVRT_RGBA; + + fileDataPtr += pvrHeader->metaDataSize; // Skip meta data header + + // Calculate data size (depends on format) + int bpp = 0; + switch (image.format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: bpp = 8; break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: bpp = 16; break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: bpp = 32; break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: bpp = 24; break; + case PIXELFORMAT_COMPRESSED_PVRT_RGB: + case PIXELFORMAT_COMPRESSED_PVRT_RGBA: bpp = 4; break; + default: break; + } + + int dataSize = image.width*image.height*bpp/8; // Total data size in bytes + image.data = (unsigned char *)RL_MALLOC(dataSize*sizeof(unsigned char)); + + memcpy(image.data, fileDataPtr, dataSize); + } + } + else if (pvrVersion == 52) TRACELOG(LOG_INFO, "IMAGE: PVRv2 format not supported, update your files to PVRv3"); + } + + return image; +} +#endif + +#if defined(SUPPORT_FILEFORMAT_ASTC) +// Load ASTC compressed image data (ASTC compression) +static Image LoadASTC(const unsigned char *fileData, unsigned int fileSize) +{ + unsigned char *fileDataPtr = (unsigned char *)fileData; + + // Required extensions: + // GL_KHR_texture_compression_astc_hdr + // GL_KHR_texture_compression_astc_ldr + + // Supported tokens (defined by extensions) + // GL_COMPRESSED_RGBA_ASTC_4x4_KHR 0x93b0 + // GL_COMPRESSED_RGBA_ASTC_8x8_KHR 0x93b7 + + // ASTC file Header (16 bytes) + typedef struct { + unsigned char id[4]; // Signature: 0x13 0xAB 0xA1 0x5C + unsigned char blockX; // Block X dimensions + unsigned char blockY; // Block Y dimensions + unsigned char blockZ; // Block Z dimensions (1 for 2D images) + unsigned char width[3]; // Image width in pixels (24bit value) + unsigned char height[3]; // Image height in pixels (24bit value) + unsigned char length[3]; // Image Z-size (1 for 2D images) + } ASTCHeader; + + Image image = { 0 }; + + if (fileDataPtr != NULL) + { + ASTCHeader *astcHeader = (ASTCHeader *)fileDataPtr; + + if ((astcHeader->id[3] != 0x5c) || (astcHeader->id[2] != 0xa1) || (astcHeader->id[1] != 0xab) || (astcHeader->id[0] != 0x13)) + { + TRACELOG(LOG_WARNING, "IMAGE: ASTC file data not valid"); + } + else + { + fileDataPtr += sizeof(ASTCHeader); // Skip header + + // NOTE: Assuming Little Endian (could it be wrong?) + image.width = 0x00000000 | ((int)astcHeader->width[2] << 16) | ((int)astcHeader->width[1] << 8) | ((int)astcHeader->width[0]); + image.height = 0x00000000 | ((int)astcHeader->height[2] << 16) | ((int)astcHeader->height[1] << 8) | ((int)astcHeader->height[0]); + + TRACELOGD("IMAGE: ASTC file data info:"); + TRACELOGD(" > Image width: %i", image.width); + TRACELOGD(" > Image height: %i", image.height); + TRACELOGD(" > Image blocks: %ix%i", astcHeader->blockX, astcHeader->blockY); + + image.mipmaps = 1; // NOTE: ASTC format only contains one mipmap level + + // NOTE: Each block is always stored in 128bit so we can calculate the bpp + int bpp = 128/(astcHeader->blockX*astcHeader->blockY); + + // NOTE: Currently we only support 2 blocks configurations: 4x4 and 8x8 + if ((bpp == 8) || (bpp == 2)) + { + int dataSize = image.width*image.height*bpp/8; // Data size in bytes + + image.data = (unsigned char *)RL_MALLOC(dataSize*sizeof(unsigned char)); + + memcpy(image.data, fileDataPtr, dataSize); + + if (bpp == 8) image.format = PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA; + else if (bpp == 2) image.format = PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA; + } + else TRACELOG(LOG_WARNING, "IMAGE: ASTC block size configuration not supported"); + } + } + + return image; +} +#endif + +// Get pixel data from image as Vector4 array (float normalized) +static Vector4 *LoadImageDataNormalized(Image image) +{ + Vector4 *pixels = (Vector4 *)RL_MALLOC(image.width*image.height*sizeof(Vector4)); + + if (image.format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "IMAGE: Pixel data retrieval not supported for compressed image formats"); + else + { + for (int i = 0, k = 0; i < image.width*image.height; i++) + { + switch (image.format) + { + case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: + { + pixels[i].x = (float)((unsigned char *)image.data)[i]/255.0f; + pixels[i].y = (float)((unsigned char *)image.data)[i]/255.0f; + pixels[i].z = (float)((unsigned char *)image.data)[i]/255.0f; + pixels[i].w = 1.0f; + + } break; + case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: + { + pixels[i].x = (float)((unsigned char *)image.data)[k]/255.0f; + pixels[i].y = (float)((unsigned char *)image.data)[k]/255.0f; + pixels[i].z = (float)((unsigned char *)image.data)[k]/255.0f; + pixels[i].w = (float)((unsigned char *)image.data)[k + 1]/255.0f; + + k += 2; + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: + { + unsigned short pixel = ((unsigned short *)image.data)[i]; + + pixels[i].x = (float)((pixel & 0b1111100000000000) >> 11)*(1.0f/31); + pixels[i].y = (float)((pixel & 0b0000011111000000) >> 6)*(1.0f/31); + pixels[i].z = (float)((pixel & 0b0000000000111110) >> 1)*(1.0f/31); + pixels[i].w = ((pixel & 0b0000000000000001) == 0)? 0.0f : 1.0f; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R5G6B5: + { + unsigned short pixel = ((unsigned short *)image.data)[i]; + + pixels[i].x = (float)((pixel & 0b1111100000000000) >> 11)*(1.0f/31); + pixels[i].y = (float)((pixel & 0b0000011111100000) >> 5)*(1.0f/63); + pixels[i].z = (float)(pixel & 0b0000000000011111)*(1.0f/31); + pixels[i].w = 1.0f; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: + { + unsigned short pixel = ((unsigned short *)image.data)[i]; + + pixels[i].x = (float)((pixel & 0b1111000000000000) >> 12)*(1.0f/15); + pixels[i].y = (float)((pixel & 0b0000111100000000) >> 8)*(1.0f/15); + pixels[i].z = (float)((pixel & 0b0000000011110000) >> 4)*(1.0f/15); + pixels[i].w = (float)(pixel & 0b0000000000001111)*(1.0f/15); + + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: + { + pixels[i].x = (float)((unsigned char *)image.data)[k]/255.0f; + pixels[i].y = (float)((unsigned char *)image.data)[k + 1]/255.0f; + pixels[i].z = (float)((unsigned char *)image.data)[k + 2]/255.0f; + pixels[i].w = (float)((unsigned char *)image.data)[k + 3]/255.0f; + + k += 4; + } break; + case PIXELFORMAT_UNCOMPRESSED_R8G8B8: + { + pixels[i].x = (float)((unsigned char *)image.data)[k]/255.0f; + pixels[i].y = (float)((unsigned char *)image.data)[k + 1]/255.0f; + pixels[i].z = (float)((unsigned char *)image.data)[k + 2]/255.0f; + pixels[i].w = 1.0f; + + k += 3; + } break; + case PIXELFORMAT_UNCOMPRESSED_R32: + { + pixels[i].x = ((float *)image.data)[k]; + pixels[i].y = 0.0f; + pixels[i].z = 0.0f; + pixels[i].w = 1.0f; + + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32: + { + pixels[i].x = ((float *)image.data)[k]; + pixels[i].y = ((float *)image.data)[k + 1]; + pixels[i].z = ((float *)image.data)[k + 2]; + pixels[i].w = 1.0f; + + k += 3; + } break; + case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: + { + pixels[i].x = ((float *)image.data)[k]; + pixels[i].y = ((float *)image.data)[k + 1]; + pixels[i].z = ((float *)image.data)[k + 2]; + pixels[i].w = ((float *)image.data)[k + 3]; + + k += 4; + } + default: break; + } + } + } + + return pixels; +} + +#endif // SUPPORT_MODULE_RTEXTURES |