diff options
Diffstat (limited to 'Source/Core/VideoCommon/Src/TextureDecoder.cpp')
| -rw-r--r-- | Source/Core/VideoCommon/Src/TextureDecoder.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Source/Core/VideoCommon/Src/TextureDecoder.cpp b/Source/Core/VideoCommon/Src/TextureDecoder.cpp index 295577ced7..f094139d27 100644 --- a/Source/Core/VideoCommon/Src/TextureDecoder.cpp +++ b/Source/Core/VideoCommon/Src/TextureDecoder.cpp @@ -57,6 +57,29 @@ int TexDecoder_GetTexelSizeInNibbles(int format) }
}
+int TexDecoder_GetTextureSizeInBytes(int width, int height, int format)
+{
+ return (width * height * TexDecoder_GetTexelSizeInNibbles(format)) / 4;
+}
+
+u32 TexDecoder_GetSafeTextureHash(const u8 *src, int width, int height, int texformat)
+{
+ int sz = TexDecoder_GetTextureSizeInBytes(width, height, texformat);
+ u32 hash = 0x1337c0de;
+ if (sz < 2048) {
+ for (int i = 0; i < sz / 4; i += 13) {
+ hash = _rotl(hash, 17) ^ ((u32 *)src)[i];
+ }
+ return hash;
+ } else {
+ int step = sz / 13 / 4;
+ for (int i = 0; i < sz / 4; i += step) {
+ hash = _rotl(hash, 17) ^ ((u32 *)src)[i];
+ }
+ }
+ return hash;
+}
+
int TexDecoder_GetBlockWidthInTexels(int format)
{
switch (format) {
|