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[Vulkan] Use dedicated alpha blend factor map for alpha srcb/dest blend

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Matches D3D12.

Co-authored-by: Herman S. <429230+has207@users.noreply.github.com>
This commit is contained in:
goldislead
2026-08-07 19:37:00 -07:00
committed by Radosław Gliński
parent 2d5b41080c
commit 53061c63fe
1 changed files with 24 additions and 2 deletions
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26
src/xenia/gpu/vulkan/vulkan_pipeline_cache.cc
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@@ -1126,15 +1126,37 @@ void VulkanPipelineCache::WritePipelineRenderTargetDescription(
/* 15 */ PipelineBlendFactor::kOneMinusConstantAlpha,
/* 16 */ PipelineBlendFactor::kSrcAlphaSaturate,
};
// Like kBlendFactorMap, but with the color factors changed to their alpha
// equivalents. Alpha is scalar, so hardware treats a _COLOR factor in the
// alpha slot as the matching _ALPHA factor.
static constexpr PipelineBlendFactor kBlendFactorAlphaMap[32] = {
/* 0 */ PipelineBlendFactor::kZero,
/* 1 */ PipelineBlendFactor::kOne,
/* 2 */ PipelineBlendFactor::kZero, // ?
/* 3 */ PipelineBlendFactor::kZero, // ?
/* 4 */ PipelineBlendFactor::kSrcAlpha,
/* 5 */ PipelineBlendFactor::kOneMinusSrcAlpha,
/* 6 */ PipelineBlendFactor::kSrcAlpha,
/* 7 */ PipelineBlendFactor::kOneMinusSrcAlpha,
/* 8 */ PipelineBlendFactor::kDstAlpha,
/* 9 */ PipelineBlendFactor::kOneMinusDstAlpha,
/* 10 */ PipelineBlendFactor::kDstAlpha,
/* 11 */ PipelineBlendFactor::kOneMinusDstAlpha,
/* 12 */ PipelineBlendFactor::kConstantAlpha,
/* 13 */ PipelineBlendFactor::kOneMinusConstantAlpha,
/* 14 */ PipelineBlendFactor::kConstantAlpha,
/* 15 */ PipelineBlendFactor::kOneMinusConstantAlpha,
/* 16 */ PipelineBlendFactor::kSrcAlphaSaturate,
};
render_target_out.src_color_blend_factor =
kBlendFactorMap[uint32_t(blend_control.color_srcblend)];
render_target_out.dst_color_blend_factor =
kBlendFactorMap[uint32_t(blend_control.color_destblend)];
render_target_out.color_blend_op = blend_control.color_comb_fcn;
render_target_out.src_alpha_blend_factor =
kBlendFactorMap[uint32_t(blend_control.alpha_srcblend)];
kBlendFactorAlphaMap[uint32_t(blend_control.alpha_srcblend)];
render_target_out.dst_alpha_blend_factor =
kBlendFactorMap[uint32_t(blend_control.alpha_destblend)];
kBlendFactorAlphaMap[uint32_t(blend_control.alpha_destblend)];
render_target_out.alpha_blend_op = blend_control.alpha_comb_fcn;
if (!command_processor_.GetVulkanDevice()
->properties()