compress/gz: Add hack to allow macOS compressed GZs to load with stbi
diff --git a/common/compress/tinfgzip.c b/common/compress/tinfgzip.c
index b34c77ce..67776660 100644
--- a/common/compress/tinfgzip.c
+++ b/common/compress/tinfgzip.c
@@ -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);
