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gpu: honour DB_ALPHA_TO_MASK as alpha-to-coverage and keep its depth writes behind the shader

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This commit is contained in:
nmzik
2026-10-21 18:22:09 +02:00
parent 2944d126b3
commit 13b291f998
10 changed files with 19 additions and 18 deletions
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src/graphics/host_gpu/renderer/pipeline/pipelineCache.cpp
+1
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@@ -971,6 +971,7 @@ PipelineCache::Pipeline& PipelineCache::GetGraphicsPipeline(
if (static_params.sample_shading_enable && !m_graphics.sample_rate_shading_enabled) {
EXIT("Pipeline: sample-rate shading is required but unsupported by the host\n");
}
static_params.alpha_to_coverage_enable = ps_active && ctx.GetShaderRegisters().AlphaToMask();
const bool rect_list = Prospero::IsRectList(command.GetUserConfig().GetPrimType());
static_params.cull_back = !rect_list && mc.cull_back;
static_params.cull_front = !rect_list && mc.cull_front;
src/graphics/host_gpu/renderer/pipeline/pipelineCache.h
+2 -1
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@@ -39,6 +39,7 @@ struct PipelineStaticParameters {
bool primitive_restart_enable = false;
uint32_t samples = 1;
bool sample_shading_enable = false;
bool alpha_to_coverage_enable = false;
uint32_t color_mask[RENDER_COLOR_ATTACHMENTS_MAX] = {};
bool cull_front = false;
bool cull_back = false;
@@ -62,7 +63,7 @@ struct PipelineStaticParameters {
static_assert(std::is_trivially_copyable_v<PipelineStaticParameters>);
static_assert(std::is_standard_layout_v<PipelineStaticParameters>);
static_assert(alignof(PipelineStaticParameters) == 1);
static_assert(sizeof(PipelineStaticParameters) == 116);
static_assert(sizeof(PipelineStaticParameters) == 117);
struct PipelineRenderingState {
std::array<vk::Format, RENDER_COLOR_ATTACHMENTS_MAX> color_formats {};
src/graphics/host_gpu/renderer/pipeline/shaders.cpp
+2
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@@ -422,6 +422,8 @@ void CreatePipelineInternal(GraphicContext& graphics, PipelineCache::Pipeline& p
multisampling.sampleShadingEnable = static_params.sample_shading_enable ? VK_TRUE : VK_FALSE;
multisampling.rasterizationSamples = vulkan_sample_count(static_params.samples);
multisampling.minSampleShading = 1.0f;
multisampling.alphaToCoverageEnable =
static_params.alpha_to_coverage_enable ? VK_TRUE : VK_FALSE;
vk::PipelineColorBlendAttachmentState color_blend_attachment[RENDER_COLOR_ATTACHMENTS_MAX] = {};
for (uint32_t i = 0; i < rendering.color_count; i++) {
src/graphics/host_gpu/renderer/renderDraw.cpp
+1 -1
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@@ -436,7 +436,7 @@ static bool DrawHasValidVertexShader(const HW::Shader& sh_ctx) {
static bool PixelShaderHasDepthOrCoverageSideEffects(const HW::ShaderRegisters& sh_regs) {
const auto& db = sh_regs.db_shader_control;
return db.shader_kill_enable || db.shader_z_export_enable || db.shader_mask_export_enable ||
db.shader_dual_export_enable || db.shader_execute_on_noop;
db.shader_dual_export_enable || db.shader_execute_on_noop || sh_regs.AlphaToMask();
}
struct DrawRenderState {