#include <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "mojodds.h"
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// helper for fuzzing with AFL
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// if you don't know what this is you don't need it
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void __afl_manual_init(void);
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int main(int argc, char *argv[]) {
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if (argc != 2) {
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return 0;
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}
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#ifdef __AFL_HAVE_MANUAL_INIT
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__afl_manual_init();
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#endif // __AFL_HAVE_MANUAL_INIT
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const char *filename = argv[1];
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FILE *f = fopen(filename, "rb");
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if (!f) {
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return 1;
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}
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fseek(f, 0, SEEK_END);
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long size = ftell(f);
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fseek(f, 0, SEEK_SET);
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char *contents = malloc(size);
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size_t readbytes = fread(contents, 1, size, f);
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if (readbytes != size) {
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free(contents);
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fclose(f);
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return 2;
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}
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fclose(f);
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int isDDS = MOJODDS_isDDS(contents, size);
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if (!isDDS) {
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return 3;
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}
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const void *tex = NULL;
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unsigned long texlen = 0;
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unsigned int glfmt = 0, w = 0, h = 0, miplevels = 0;
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unsigned int cubemapfacelen = 0;
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MOJODDS_textureType textureType = MOJODDS_TEXTURE_NONE;
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int retval = MOJODDS_getTexture(contents, size, &tex, &texlen, &glfmt, &w, &h, &miplevels, &cubemapfacelen, &textureType);
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if (!retval) {
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free(contents);
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return 4;
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}
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uint32_t hash = 0x12345678;
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switch (textureType) {
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case MOJODDS_TEXTURE_NONE:
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assert(false); // this is not supposed to happen
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break;
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case MOJODDS_TEXTURE_2D:
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for (unsigned int miplevel = 0; miplevel < miplevels; miplevel++) {
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const void *miptex = NULL;
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unsigned long miptexlen = 0;
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unsigned int mipW = 0, mipH = 0;
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retval = MOJODDS_getMipMapTexture(miplevel, glfmt, tex, texlen, w, h, &miptex, &miptexlen, &mipW, &mipH);
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if (!retval) {
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continue;
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}
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// read every byte to make sure any buffer overflows actually overflow
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const char *miptex_ = (const char *) miptex;
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for (unsigned int i = 0; i < miptexlen; i++) {
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hash = (hash * 65537) ^ miptex_[i];
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}
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}
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break;
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case MOJODDS_TEXTURE_CUBE:
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for (MOJODDS_cubeFace cubeFace = MOJODDS_CUBEFACE_POSITIVE_X; cubeFace <= MOJODDS_CUBEFACE_NEGATIVE_Z; cubeFace++) {
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for (unsigned int miplevel = 0; miplevel < miplevels; miplevel++) {
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const void *miptex = NULL;
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unsigned long miptexlen = 0;
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unsigned int mipW = 0, mipH = 0;
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retval = MOJODDS_getCubeFace(cubeFace, miplevel, glfmt, tex, texlen, w, h, &miptex, &miptexlen, &mipW, &mipH);
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if (!retval) {
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continue;
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}
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// read every byte to make sure any buffer overflows actually overflow
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const char *miptex_ = (const char *) miptex;
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for (unsigned int i = 0; i < miptexlen; i++) {
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hash = (hash * 65537) ^ miptex_[i];
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}
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}
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}
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break;
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case MOJODDS_TEXTURE_VOLUME:
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// TODO: do something with the data
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break;
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}
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// do something the optimizer is not allowed to remove
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printf("0x%08x\n", hash);
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free(contents);
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return 0;
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}
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