diff options
Diffstat (limited to 'minilibx/mlx_png.c')
| -rw-r--r-- | minilibx/mlx_png.c | 418 |
1 files changed, 0 insertions, 418 deletions
diff --git a/minilibx/mlx_png.c b/minilibx/mlx_png.c deleted file mode 100644 index ca8024d..0000000 --- a/minilibx/mlx_png.c +++ /dev/null @@ -1,418 +0,0 @@ - - -#include <stdlib.h> -#include <stdio.h> -#include <sys/mman.h> -#include <unistd.h> -#include <fcntl.h> -#include <err.h> -#include <string.h> -#include <arpa/inet.h> - -#include "zlib.h" - -#include <OpenGL/gl3.h> -#include "mlx_int.h" - - -#define PNG_MAGIC_SIZE 8 -unsigned char magic[PNG_MAGIC_SIZE] = {137, 80, 78, 71, 13, 10, 26, 10}; -#define PNG_HDR_SIZE 13 - -#define Z_CHUNK 32768 - -#define ERR_MAGIC_SIZE 1 -#define ERR_MAGIC_WRONG 2 -#define ERR_STRUCT_INCOMPLETE 3 -#define ERR_STRUCT_HDR 4 -#define ERR_STRUCT_END 5 -#define ERR_STRUCT_CRC 6 -#define ERR_STRUCT_INCIMPL 7 -#define ERR_STRUCT_DAT 8 -#define ERR_STRUCT_MISSCHK 9 -#define ERR_ZLIB 10 -#define ERR_DATA_MISMATCH 11 -#define ERR_DATA_FILTER 12 -char *(mipng_err[]) = -{ - "No error", - "Not enough size for magic", - "Wrong magic", - "Incomplete chunk structure", - "Duplicate or incorrect header", - "Duplicate or incorrect end", - "Invalid CRC in chunk", - "Incorrect header or configuration not implemented", - "Non consecutive dat chunks", - "Missing header/dat/end chunk(s)", - "Zlib inflate error", - "Inflated data size mismatch", - "Unknown scanline filter" -}; - -typedef struct png_info_s -{ - unsigned int width; - unsigned int height; - int depth; - int color; - int interlace; - int bpp; -} png_info_t; - - -int mipng_is_type(unsigned char *ptr, char *type) -{ - if (ptr[4] == type[0] && ptr[5] == type[1] && ptr[6] == type[2] && ptr[7] == type[3]) - return (1); - return (0); -} - - -unsigned char mipng_defilter_none(unsigned char *buff, int pos, int a, int b, int c) -{ return (buff[pos]); } -unsigned char mipng_defilter_sub(unsigned char *buff, int pos, int a, int b, int c) -{ return (buff[pos]+(unsigned int)a); } -unsigned char mipng_defilter_up(unsigned char *buff, int pos, int a, int b, int c) -{ return (buff[pos]+(unsigned int)b); } -unsigned char mipng_defilter_average(unsigned char *buff, int pos, int a, int b, int c) -{ return (buff[pos]+((unsigned int)a+(unsigned int)b)/2); } -unsigned char mipng_defilter_paeth(unsigned char *buff, int pos, int a, int b, int c) -{ - int p; - int result; - - p = a + b - c; - if (abs(b - c) <= abs(a - c) && abs(b - c) <= abs(a + b - c - c)) - result = a; - else - if (abs(a - c) <= abs(a + b - c - c)) - result = b; - else - result = c; - return (buff[pos]+result); -} - - - -unsigned char (*(mipng_defilter[]))(unsigned char *buff, int pos, int a, int b, int c) = -{ - mipng_defilter_none, - mipng_defilter_sub, - mipng_defilter_up, - mipng_defilter_average, - mipng_defilter_paeth -}; - -// only work for mlx mac or img 32bpp -int mipng_fill_img(mlx_img_list_t *img, unsigned char *buf, png_info_t *pi) -{ - unsigned int current_filter; - int ipos; - int bpos; - int ilen; - int iline; - int blen; - unsigned char tmp; - unsigned char *ibuf; - - ibuf = (unsigned char *)img->buffer; - iline = img->width * UNIQ_BPP; - ilen = img->width * img->height * UNIQ_BPP; - blen = img->width * img->height * pi->bpp + img->height; - ipos = 0; - bpos = 0; - while (ipos < ilen && bpos < blen) - { - if ((ipos % iline) == 0) - { - if ((current_filter = buf[bpos++]) > 4) - return (ERR_DATA_FILTER); - } - ibuf[ipos] = mipng_defilter[current_filter](buf, bpos, - ipos%iline>3?ibuf[ipos-UNIQ_BPP]:0, - (ipos>=iline)?ibuf[ipos-iline]:0, - (ipos>=iline && ipos%iline>3)?ibuf[ipos-iline-UNIQ_BPP]:0); - ipos ++; - bpos ++; - if (pi->depth == 16) - bpos ++; - if (ipos % 4 == 3 && pi->color == 2) // no alpha - img->buffer[ipos++] = 0xFF; - } - if (ipos != ilen || bpos != blen) - { - // printf("fill err ipos %d vs %d, bpos %d vs %d\n", ipos, ilen, bpos, blen); - return (ERR_DATA_MISMATCH); - } - ipos = 0; - while (ipos < ilen) - { - tmp = ibuf[ipos]; - ibuf[ipos] = ibuf[ipos+2]; - ibuf[ipos+2] = tmp; - ibuf[ipos+3] = 0xFF - ibuf[ipos+3]; - ipos += UNIQ_BPP; - } - return (0); -} - - -int mipng_data(mlx_img_list_t *img, unsigned char *dat, png_info_t *pi) -{ - unsigned int len; - int b_pos; - unsigned char *buffer; - int ret; - int z_ret; - unsigned z_have; - z_stream z_strm; - unsigned char z_out[Z_CHUNK]; - - b_pos = 0; - if (!(buffer = malloc((long long)img->width*(long long)img->height*(long long)pi->bpp + img->height))) - err(1, "Can't malloc"); - z_strm.zalloc = Z_NULL; - z_strm.zfree = Z_NULL; - z_strm.opaque = Z_NULL; - z_strm.avail_in = 0; - z_strm.next_in = Z_NULL; - z_ret = inflateInit(&z_strm); - if (z_ret != Z_OK) - return (ERR_ZLIB); - - while (mipng_is_type(dat, "IDAT")) - { - len = *((unsigned int *)dat); - len = ntohl(len); - z_strm.avail_in = len; - z_strm.next_in = dat + 8; - z_strm.avail_out = 0; - while (z_strm.avail_out == 0) - { - z_strm.avail_out = Z_CHUNK; - z_strm.next_out = z_out; - z_ret = inflate(&z_strm, Z_NO_FLUSH); - // printf("inflate ret %d avail_out %d\n", z_ret, z_strm.avail_out); - if (z_ret != Z_OK && z_ret != Z_STREAM_END) - { - inflateEnd(&z_strm); - return (ERR_ZLIB); - } - if (b_pos + Z_CHUNK - z_strm.avail_out > img->width*img->height*pi->bpp+img->height) - { - inflateEnd(&z_strm); - return (ERR_DATA_MISMATCH); - } - bcopy(z_out, buffer+b_pos, Z_CHUNK - z_strm.avail_out); - b_pos += Z_CHUNK - z_strm.avail_out; - } - dat += len + 4 + 4 + 4; - } - inflateEnd(&z_strm); - if (b_pos != img->width*img->height*pi->bpp+img->height) - { - // printf("pb : bpos %d vs expected %d\n", b_pos, img->width*img->height*pi->bpp+img->height); - return (ERR_DATA_MISMATCH); - } - if ((ret = mipng_fill_img(img, buffer, pi))) - return (ret); - return (0); -} - - - -int mipng_magic(unsigned char *ptr, int size) -{ - int i; - - if (size < PNG_MAGIC_SIZE) - return (ERR_MAGIC_SIZE); - i = 0; - while (i < PNG_MAGIC_SIZE) - if (*(ptr++) != magic[i++]) - return (ERR_MAGIC_WRONG); - return (0); -} - - -unsigned long crc_table[256] = { 0, 0x77073096, 0xee0e612c, 0x990951ba, 0x76dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0xedb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x9b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x1db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x6b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0xf00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x86d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x3b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x4db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0xd6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0xa00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x26d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x5005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0xcb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0xbdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d }; - -// From http://www.w3.org/TR/PNG/#D-CRCAppendix -int mipng_crc(unsigned char *ptr, int len) -{ - unsigned int file_crc; - unsigned long crc; - int i; - - file_crc = *((unsigned int *)(ptr+4+4+len)); - file_crc = ntohl(file_crc); - - crc = 0xffffffffL; - i = 0; - while (i < len+4) - crc = crc_table[(crc ^ ptr[(i++)+4]) & 0xff] ^ (crc >> 8); - crc ^= 0xffffffffL; - - if (file_crc != crc) - return (1); - return (0); -} - - -int mipng_structure(unsigned char *ptr, int size, unsigned char **hdr, unsigned char **dat) -{ - unsigned int len; - int dat_state; - int end; - - dat_state = 0; - *hdr = NULL; - *dat = NULL; - end = 0; - while (size) - { - if (size >= 4) // length present - { - len = *((unsigned int *)ptr); - len = ntohl(len); - if (size < 4 + 4 + 4 + len) - return (ERR_STRUCT_INCOMPLETE); - if (mipng_crc(ptr, len)) - return (ERR_STRUCT_CRC); - // printf("found chunk len %d type %c%c%c%c\n", len, *(ptr+4), *(ptr+5), *(ptr+6), *(ptr+7)); - if (mipng_is_type(ptr, "IHDR")) - { - if (*hdr || len != PNG_HDR_SIZE) - return (ERR_STRUCT_HDR); - *hdr = ptr; - } - if (mipng_is_type(ptr, "IEND")) - { - if (len != 0 || size != 4+4+4) - return (ERR_STRUCT_END); - end = 1; - } - if (mipng_is_type(ptr, "IDAT")) - { - if (dat_state == 0) - { - dat_state = 1; - *dat = ptr; - } - if (dat_state == 2) - return (ERR_STRUCT_DAT); - } - else - if (dat_state == 1) - dat_state = 2; - size -= 4+4+4+len; - ptr += 4+4+4+len; - } - else - return (ERR_STRUCT_INCOMPLETE); - } - if (*hdr == 0 || *dat == 0 || end == 0) - return (ERR_STRUCT_MISSCHK); - return (0); -} - - -int mipng_verif_hdr(unsigned char *hdr, png_info_t *pi) -{ - unsigned int compress; - unsigned int filter; - - hdr += 8; - pi->width = ntohl(*((unsigned long *)hdr)); - pi->height = ntohl(*((unsigned long *)(hdr+4))); - pi->depth = *(hdr+8); - pi->color = *(hdr+9); - compress = *(hdr+10); - filter = *(hdr+11); - pi->interlace = *(hdr+12); - if (pi->width <= 0 || pi->height <= 0 || (pi->depth != 8 && pi->depth != 16) - || (pi->color != 2 && pi->color != 6) || compress != 0 || filter != 0 || pi->interlace != 0) - return (ERR_STRUCT_INCIMPL); - pi->bpp = pi->depth / 8; - if (pi->color == 2) - pi->bpp *= 3; - if (pi->color == 6) - pi->bpp *= 4; - // printf("hdr info : %d x %d, depth %d, col type %d, comp %d, filter %d, interlace %d\nbpp is %d\n", - // pi->width, pi->height, pi->depth, pi->color, compress, filter, pi->interlace, pi->bpp); - return (0); -} - - -mlx_img_list_t *mlx_int_parse_png(mlx_ptr_t *xvar, unsigned char *fptr, int size) -{ - int err; - unsigned char *hdr; - unsigned char *dat; - png_info_t pi; - mlx_img_list_t *img; - - if ((err = mipng_magic(fptr, size))) - { - warnx("mlx PNG error : %s", mipng_err[err]); - return ((mlx_img_list_t *)0); - } - fptr += PNG_MAGIC_SIZE; - size -= PNG_MAGIC_SIZE; - if ((err = mipng_structure(fptr, size, &hdr, &dat))) - { - warnx("mlx PNG error : %s", mipng_err[err]); - return ((mlx_img_list_t *)0); - } - if ((err = mipng_verif_hdr(hdr, &pi))) - { - warnx("mlx PNG error : %s", mipng_err[err]); - return ((mlx_img_list_t *)0); - } - if (!(img = mlx_new_image(xvar, pi.width, pi.height))) - { - warnx("mlx PNG error : Can't create mlx image"); - return ((mlx_img_list_t *)0); - } - if ((err = mipng_data(img, dat, &pi))) - { - mlx_destroy_image(xvar, img); - warnx("mlx PNG error : %s", mipng_err[err]); - return ((mlx_img_list_t *)0); - } - return (img); -} - - - - -void *mlx_png_file_to_image(mlx_ptr_t *xvar, char *file, int *width, int *height) -{ - int fd; - int size; - unsigned char *ptr; - mlx_img_list_t *img; - - if ((fd = open(file, O_RDONLY)) == -1 || (size = lseek(fd, 0, SEEK_END)) == -1 || - (ptr = mmap(0, size, PROT_READ, MAP_PRIVATE, fd, 0)) == (void *)MAP_FAILED) - { - if (fd >= 0) - close(fd); - warnx("Can't map png file '%s'", file); - return ((void *)0); - } - if ((img = mlx_int_parse_png(xvar, ptr, size))) - { - *width = img->width; - *height = img->height; - } - else - { - *width = 0; - *height = 0; - } - munmap(ptr,size); - close(fd); - return (img); -} |