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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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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/guest_gpu/hardwareContext.h
+7
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@@ -576,6 +576,12 @@ struct ShaderRegisters {
uint32_t m_paScShaderControl = 0;
DepthShaderControl db_shader_control;
bool alpha_to_mask_enable = false;
// DB_SHADER_CONTROL.ALPHA_TO_MASK_DISABLE overrides DB_ALPHA_TO_MASK per shader.
[[nodiscard]] bool AlphaToMask() const {
return alpha_to_mask_enable && !db_shader_control.alpha_to_mask_disable;
}
[[nodiscard]] uint32_t GetExportCount() const {
return 1u + ((m_spiVsOutConfig >> 1u) & 0x1Fu);
@@ -915,6 +921,7 @@ public:
void SetDepthShaderControl(const DepthShaderControl& value) {
m_sh_regs.db_shader_control = value;
}
void SetAlphaToMaskEnable(bool value) { m_sh_regs.alpha_to_mask_enable = value; }
void SetScShaderControl(uint32_t value) { m_sh_regs.m_paScShaderControl = value; }