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Follow the intent of the game's lookups rather than the practice, to reduce banding.

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This commit is contained in:
Henrik Rydgård 2023-04-25 23:17:40 +02:00
parent 484f2c5954
commit 6274eb7cae
1 changed files with 8 additions and 2 deletions
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10
GPU/Common/DepalettizeShaderCommon.cpp
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@ -249,7 +249,8 @@ void GenerateDepalShaderFloat(ShaderWriter &writer, const DepalConfig &config) {
break;
case GE_FORMAT_5551:
if (config.textureFormat == GE_TFMT_CLUT8 && mask == 0xFF && shift == 0) {
sprintf(lookupMethod, "(index.a * 128.0 + index.b * 64.0 + index.g * 4.0)"); // we just skip A.
// Follow the intent here, and ignore g (and let's not round unnecessarily).
sprintf(lookupMethod, "floor(floor(index.a) * 128.0 + index.b * 64.0)"); // we just skip A.
index_multiplier = 1.0f / 256.0f;
// SOCOM case. #16210
} else if ((mask & (mask + 1)) == 0 && shift < 16) {
@ -373,7 +374,12 @@ void GenerateDepalFs(ShaderWriter &writer, const DepalConfig &config) {
case GLSL_VULKAN:
case GLSL_3xx:
case HLSL_D3D11:
GenerateDepalShader300(writer, config);
// Use the float shader for the SOCOM special.
if (config.bufferFormat == GE_FORMAT_5551 && config.textureFormat == GE_TFMT_CLUT8) {
GenerateDepalShaderFloat(writer, config);
} else {
GenerateDepalShader300(writer, config);
}
break;
default:
_assert_msg_(false, "Shader language not supported for depal: %d", (int)writer.Lang().shaderLanguage);