diff options
Diffstat (limited to 'Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGenMemory.cs')
| -rw-r--r-- | Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGenMemory.cs | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGenMemory.cs b/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGenMemory.cs index 263eada6..a5d2632c 100644 --- a/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGenMemory.cs +++ b/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGenMemory.cs @@ -677,7 +677,28 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions return vector; } - Append(ApplyScaling(AssemblePVector(pCount))); + string ApplyBias(string vector) + { + int gatherBiasPrecision = context.Config.GpuAccessor.QueryHostGatherBiasPrecision(); + if (isGather && gatherBiasPrecision != 0) + { + // GPU requires texture gather to be slightly offset to match NVIDIA behaviour when point is exactly between two texels. + // Offset by the gather precision divided by 2 to correct for rounding. + + if (pCount == 1) + { + vector = $"{vector} + (1.0 / (float(textureSize({samplerName}, 0)) * float({1 << (gatherBiasPrecision + 1)})))"; + } + else + { + vector = $"{vector} + (1.0 / (vec{pCount}(textureSize({samplerName}, 0).{"xyz".Substring(0, pCount)}) * float({1 << (gatherBiasPrecision + 1)})))"; + } + } + + return vector; + } + + Append(ApplyBias(ApplyScaling(AssemblePVector(pCount)))); string AssembleDerivativesVector(int count) { |