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compress/gz: Add hack to allow macOS compressed GZs to load with stbi

This commit is contained in:
mintsuki 2023-03-05 09:08:37 +01:00
parent 7b9600c893
commit f92e6706c4
1 changed files with 9 additions and 1 deletions
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10
common/compress/tinfgzip.c
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@ -116,7 +116,15 @@ void *tinf_gzip_uncompress(const void *source, uint64_t sourceLen, uint64_t *out
void *buf = ext_mem_alloc(dlen);
res = stbi_zlib_decode_noheader_buffer(buf, dlen, (const char *)start, (src + sourceLen) - start - 8);
// XXX for some reason certain GZ files made by macOS do not properly decompress with stb_image
// unless some skew (19 bytes?) is applied to the buffer. I have no idea why this is the
// case but I'd rather have them load somewhat than not load at all.
for (uint64_t skew = 0; skew < 32; skew++) {
res = stbi_zlib_decode_noheader_buffer(buf, dlen, (const char *)start + skew, (src + sourceLen) - start - 8 - skew);
if (res != -1) {
break;
}
}
if (res == -1) {
pmm_free(buf, dlen);