diff options
| author | magumagu <magumagu9@gmail.com> | 2014-05-11 12:53:02 -0700 |
|---|---|---|
| committer | magumagu <magumagu9@gmail.com> | 2014-05-11 12:53:02 -0700 |
| commit | 9e4eeb3b9b012265d0f9865aeaa3fecbf200d7fc (patch) | |
| tree | 1f971acc4ee1c8df17d9e54b36d32ce9996582f6 /Source/Core/VideoCommon | |
| parent | 36720e6822a8049c34ff1bfe4ea24e47f85847ca (diff) | |
Video backends: fix rounding in lighting computation.
For whatever reason, the hardware doesn't do a full divide by 255, but
instead uses an approximation with shifting, similar to the way it is done
in TEV.
Diffstat (limited to 'Source/Core/VideoCommon')
| -rw-r--r-- | Source/Core/VideoCommon/LightingShaderGen.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Source/Core/VideoCommon/LightingShaderGen.h b/Source/Core/VideoCommon/LightingShaderGen.h index f07f67d941..3ee6501b20 100644 --- a/Source/Core/VideoCommon/LightingShaderGen.h +++ b/Source/Core/VideoCommon/LightingShaderGen.h @@ -255,7 +255,8 @@ static void GenerateLightingShader(T& object, LightingUidData& uid_data, int com GenerateLightShader<T>(object, uid_data, i, lit_index, lightsColName, lightsName, coloralpha); } } - object.Write("%s%d = float4(mat * clamp(lacc, 0, 255) / 255) / 255.0;\n", dest, j); + object.Write("lacc = clamp(lacc, 0, 255);"); + object.Write("%s%d = float4((mat * (lacc + (lacc >> 7))) >> 8) / 255.0;\n", dest, j); object.Write("}\n"); } } |