src/qoiconv.c

   1 /*
   2
   3 Command line tool to convert between png <> qoi format
   4
   5 Requires "stb_image.h" and "stb_image_write.h"
   6 Compile with:
   7         gcc qoiconv.c -std=c99 -O3 -o qoiconv
   8
   9 Dominic Szablewski - https://phoboslab.org
  10
  11
  12 -- LICENSE: The MIT License(MIT)
  13
  14 Copyright(c) 2021 Dominic Szablewski
  15
  16 Permission is hereby granted, free of charge, to any person obtaining a copy of
  17 this software and associated documentation files(the "Software"), to deal in
  18 the Software without restriction, including without limitation the rights to
  19 use, copy, modify, merge, publish, distribute, sublicense, and / or sell copies
  20 of the Software, and to permit persons to whom the Software is furnished to do
  21 so, subject to the following conditions :
  22 The above copyright notice and this permission notice shall be included in all
  23 copies or substantial portions of the Software.
  24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  25 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
  27 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  28 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  29 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 SOFTWARE.
  31
  32 */
  33
  34
  35 #define STB_IMAGE_IMPLEMENTATION
  36 #define STBI_ONLY_PNG
  37 #define STBI_NO_LINEAR
  38 #include "stb/stb_image.h"
  39
  40 //#define STB_IMAGE_WRITE_IMPLEMENTATION
  41 //#include "stb_image_write.h"
  42
  43 #define QOI_IMPLEMENTATION
  44 #include "phoboslab/qoi.h"
  45
  46
  47 #define STR_ENDS_WITH(S, E) (strcmp(S + strlen(S) - (sizeof(E)-1), E) == 0)
  48
  49 int main(int argc, char **argv) {
  50         if (argc < 3) {
  51                 printf("Usage: qoiconv <infile> <outfile>\n");
  52                 printf("Examples:\n");
  53                 printf("  qoiconv input.png output.qoi\n");
  54                 printf("  qoiconv input.qoi output.png\n");
  55                 exit(1);
  56         }
  57
  58         stbi_set_flip_vertically_on_load(1);
  59
  60         void *pixels = NULL;
  61         int w, h, channels;
  62         if (STR_ENDS_WITH(argv[1], ".png")) {
  63                 pixels = (void *)stbi_load(argv[1], &w, &h, &channels, 4);
  64         }
  65         else if (STR_ENDS_WITH(argv[1], ".qoi")) {
  66                 qoi_desc desc;
  67                 pixels = qoi_read(argv[1], &desc, 0);
  68                 channels = desc.channels;
  69                 w = desc.width;
  70                 h = desc.height;
  71         }
  72
  73         if (pixels == NULL) {
  74                 printf("Couldn't load/decode %s\n", argv[1]);
  75                 exit(1);
  76         }
  77
  78         int encoded = 0;
  79         if (STR_ENDS_WITH(argv[2], ".png")) {
  80                 //encoded = stbi_write_png(argv[2], w, h, channels, pixels, 0);
  81         }
  82         else if (STR_ENDS_WITH(argv[2], ".qoi")) {
  83                 encoded = qoi_write(argv[2], pixels, &(qoi_desc){
  84                         .width = w,
  85                         .height = h,
  86                         .channels = 4,
  87                         .colorspace = QOI_SRGB
  88                 });
  89         }
  90
  91         if (!encoded) {
  92                 printf("Couldn't write/encode %s\n", argv[2]);
  93                 exit(1);
  94         }
  95
  96         free(pixels);
  97         return 0;
  98 }