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[vulkan] Fixed dual-source blending to correctly map shader outputs. (#3637)

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Fixes Skyward Sword HD eye gitch and a related MoltenVK crash due to the incorrect output mapping. Verified working on mac and android.

The test in vk_pipeline_cache.cpp is a bit ugly, but it didn't seem worth it to go lambda/macro just to make it look cleaner. Could change if necessary.

Co-authored-by: tarako <none@none.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3637
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: tarako <r76036296@gmail.com>
Co-committed-by: tarako <r76036296@gmail.com>
This commit is contained in:
tarako 2026-03-03 01:54:57 +01:00 • committed by crueter
parent 464212393e
commit d720a7b4b4
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4 changed files with 58 additions and 4 deletions
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30
src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
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@ -237,11 +237,38 @@ Shader::RuntimeInfo MakeRuntimeInfo(std::span<const Shader::IR::Program> program
}
info.convert_depth_mode = gl_ndc;
break;
case Shader::Stage::Fragment:
case Shader::Stage::Fragment: {
info.alpha_test_func = MaxwellToCompareFunction(
key.state.UnpackComparisonOp(key.state.alpha_test_func.Value()));
info.alpha_test_reference = std::bit_cast<float>(key.state.alpha_test_ref);
// Check for dual source blending
const auto& blend0 = key.state.attachments[0];
if (blend0.enable != 0) {
using F = Maxwell::Blend::Factor;
const auto src_rgb = blend0.SourceRGBFactor();
const auto dst_rgb = blend0.DestRGBFactor();
const auto src_a = blend0.SourceAlphaFactor();
const auto dst_a = blend0.DestAlphaFactor();
info.dual_source_blend =
src_rgb == F::Source1Color_D3D || src_rgb == F::OneMinusSource1Color_D3D ||
src_rgb == F::Source1Alpha_D3D || src_rgb == F::OneMinusSource1Alpha_D3D ||
src_rgb == F::Source1Color_GL || src_rgb == F::OneMinusSource1Color_GL ||
src_rgb == F::Source1Alpha_GL || src_rgb == F::OneMinusSource1Alpha_GL ||
dst_rgb == F::Source1Color_D3D || dst_rgb == F::OneMinusSource1Color_D3D ||
dst_rgb == F::Source1Alpha_D3D || dst_rgb == F::OneMinusSource1Alpha_D3D ||
dst_rgb == F::Source1Color_GL || dst_rgb == F::OneMinusSource1Color_GL ||
dst_rgb == F::Source1Alpha_GL || dst_rgb == F::OneMinusSource1Alpha_GL ||
src_a == F::Source1Color_D3D || src_a == F::OneMinusSource1Color_D3D ||
src_a == F::Source1Alpha_D3D || src_a == F::OneMinusSource1Alpha_D3D ||
src_a == F::Source1Color_GL || src_a == F::OneMinusSource1Color_GL ||
src_a == F::Source1Alpha_GL || src_a == F::OneMinusSource1Alpha_GL ||
dst_a == F::Source1Color_D3D || dst_a == F::OneMinusSource1Color_D3D ||
dst_a == F::Source1Alpha_D3D || dst_a == F::OneMinusSource1Alpha_D3D ||
dst_a == F::Source1Color_GL || dst_a == F::OneMinusSource1Color_GL ||
dst_a == F::Source1Alpha_GL || dst_a == F::OneMinusSource1Alpha_GL;
}
if (device.IsMoltenVK()) {
for (size_t i = 0; i < 8; ++i) {
const auto format = static_cast<Tegra::RenderTargetFormat>(key.state.color_formats[i]);
@ -258,6 +285,7 @@ Shader::RuntimeInfo MakeRuntimeInfo(std::span<const Shader::IR::Program> program
}
}
break;
}
default:
break;
}