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Merge pull request #2148 from etang-cw/FixDref

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MSL: Fix dref lod workaround on combined texture/samplers
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Hans-Kristian Arntzen 2023-05-16 17:05:19 +02:00 committed by GitHub
commit 28b11e010a
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1 changed files with 7 additions and 4 deletions
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11
spirv_msl.cpp
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@ -10902,26 +10902,29 @@ string CompilerMSL::to_function_args(const TextureFunctionArguments &args, bool
// Therefore, dP/dx = dP/dy = exp2(lod)/extent.
// (Subtracting 0.5 before exponentiation gives better results.)
string grad_opt, extent;
VariableID base_img = img;
if (auto *combined = maybe_get<SPIRCombinedImageSampler>(img))
base_img = combined->image;
switch (imgtype.image.dim)
{
case Dim1D:
grad_opt = "2d";
extent = join("float2(", to_expression(img), ".get_width(), 1.0)");
extent = join("float2(", to_expression(base_img), ".get_width(), 1.0)");
break;
case Dim2D:
grad_opt = "2d";
extent = join("float2(", to_expression(img), ".get_width(), ", to_expression(img), ".get_height())");
extent = join("float2(", to_expression(base_img), ".get_width(), ", to_expression(base_img), ".get_height())");
break;
case DimCube:
if (imgtype.image.arrayed && msl_options.emulate_cube_array)
{
grad_opt = "2d";
extent = join("float2(", to_expression(img), ".get_width())");
extent = join("float2(", to_expression(base_img), ".get_width())");
}
else
{
grad_opt = "cube";
extent = join("float3(", to_expression(img), ".get_width())");
extent = join("float3(", to_expression(base_img), ".get_width())");
}
break;
default: