diff options
Diffstat (limited to 'Source/Core/VideoCommon/Src/TextureDecoder.cpp')
| -rw-r--r-- | Source/Core/VideoCommon/Src/TextureDecoder.cpp | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/Source/Core/VideoCommon/Src/TextureDecoder.cpp b/Source/Core/VideoCommon/Src/TextureDecoder.cpp index d49633609c..c6db5582bb 100644 --- a/Source/Core/VideoCommon/Src/TextureDecoder.cpp +++ b/Source/Core/VideoCommon/Src/TextureDecoder.cpp @@ -88,7 +88,7 @@ int TexDecoder_GetTextureSizeInBytes(int width, int height, int format) return (width * height * TexDecoder_GetTexelSizeInNibbles(format)) / 2; } -u64 TexDecoder_GetTlutHash(const u8* src, int len) +/*u64 TexDecoder_GetTlutHash(const u8* src, int len) { //char str[40000], st[20]; str[0]='\0';for (int i=0;i<len;i++){sprintf(st,"%02x ",src[i]);strcat(str,st);} u64 hash = 0xbeefbabe1337c0de; @@ -111,6 +111,36 @@ u64 TexDecoder_GetSafeTextureHash(const u8 *src, int width, int height, int texf } return hash; } +*/ + +u32 TexDecoder_GetTlutHash(const u8* src, int len) +{ + //char str[40000], st[20]; str[0]='\0';for (int i=0;i<len;i++){sprintf(st,"%02x ",src[i]);strcat(str,st);} + u32 hash = 0xbeefbabe; + for (int i = 0; i < len / 4; i ++) { + hash = _rotl(hash, 7) ^ ((u32 *)src)[i]; + hash += 7; // to add a bit more entropy/mess in here + } + return hash; +} + +u32 TexDecoder_GetSafeTextureHash(const u8 *src, int width, int height, int texformat, u32 seed) +{ + int sz = TexDecoder_GetTextureSizeInBytes(width, height, texformat); + u32 hash = seed ? seed : 0x1337c0de; + if (sz < 2048) { + for (int i = 0; i < sz / 4; i += 13) { + hash = _rotl(hash, 19) ^ ((u32 *)src)[i]; + } + return hash; + } else { + int step = sz / 23 / 4; + for (int i = 0; i < sz / 4; i += step) { + hash = _rotl(hash, 19) ^ ((u32 *)src)[i]; + } + } + return hash; +} int TexDecoder_GetBlockWidthInTexels(u32 format) { |