92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/*
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Copyright (c) 2021, Dominic Szablewski - https://phoboslab.org
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SPDX-License-Identifier: MIT
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Command line tool to convert between png <> qoi format
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Requires:
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-"stb_image.h" (https://github.com/nothings/stb/blob/master/stb_image.h)
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-"stb_image_write.h" (https://github.com/nothings/stb/blob/master/stb_image_write.h)
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-"qoi.h" (https://github.com/phoboslab/qoi/blob/master/qoi.h)
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Compile with:
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gcc qoiconv.c -std=c99 -O3 -o qoiconv
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*/
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#define STB_IMAGE_IMPLEMENTATION
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#define STBI_ONLY_PNG
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#define STBI_NO_LINEAR
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#include "stb_image.h"
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#define STB_IMAGE_WRITE_IMPLEMENTATION
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#include "stb_image_write.h"
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#define QOI_IMPLEMENTATION
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#include "qoi.h"
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#define STR_ENDS_WITH(S, E) (strcmp(S + strlen(S) - (sizeof(E)-1), E) == 0)
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int main(int argc, char **argv) {
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if (argc < 3) {
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puts("Usage: qoiconv <infile> <outfile>");
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puts("Examples:");
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puts(" qoiconv input.png output.qoi");
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puts(" qoiconv input.qoi output.png");
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exit(1);
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}
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void *pixels = NULL;
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int w, h, channels;
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if (STR_ENDS_WITH(argv[1], ".png")) {
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if(!stbi_info(argv[1], &w, &h, &channels)) {
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printf("Couldn't read header %s\n", argv[1]);
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exit(1);
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}
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// Force all odd encodings to be RGBA
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if(channels != 3) {
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channels = 4;
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}
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pixels = (void *)stbi_load(argv[1], &w, &h, NULL, channels);
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}
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else if (STR_ENDS_WITH(argv[1], ".qoi")) {
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qoi_desc desc;
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pixels = qoi_read(argv[1], &desc, 0);
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channels = desc.channels;
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w = desc.width;
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h = desc.height;
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}
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if (pixels == NULL) {
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printf("Couldn't load/decode %s\n", argv[1]);
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exit(1);
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}
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int encoded = 0;
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if (STR_ENDS_WITH(argv[2], ".png")) {
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encoded = stbi_write_png(argv[2], w, h, channels, pixels, 0);
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}
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else if (STR_ENDS_WITH(argv[2], ".qoi")) {
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encoded = qoi_write(argv[2], pixels, &(qoi_desc){
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.width = w,
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.height = h,
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.channels = channels,
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.colorspace = QOI_SRGB
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});
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}
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if (!encoded) {
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printf("Couldn't write/encode %s\n", argv[2]);
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exit(1);
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}
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free(pixels);
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return 0;
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}
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