mirror of
https://github.com/KytyPS5/KytyPS5.git
synced 2026-10-26 12:56:54 +01:00
nmzik
71 lines
2.8 KiB
C++
71 lines
2.8 KiB
C++
#include "graphics/host_gpu/renderer/pipeline/blendMapping.h"
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#include "graphics/guest_gpu/hardwareContext.h"
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#include <initializer_list>
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namespace Libs::Graphics {
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bool BlendFactorIsDualSource(uint8_t factor) {
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return factor >= static_cast<uint8_t>(Prospero::BlendFactor::kSrc1Color) &&
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factor <= static_cast<uint8_t>(Prospero::BlendFactor::kOneMinusSrc1Alpha);
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}
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namespace {
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bool BlendFactorIsConstantColor(uint8_t factor) {
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return factor == static_cast<uint8_t>(Prospero::BlendFactor::kConstantColor) ||
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factor == static_cast<uint8_t>(Prospero::BlendFactor::kOneMinusConstantColor);
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}
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} // namespace
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BlendMappingSupport ClassifyBlendMapping(const HW::BlendControl& blend,
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const Prospero::ColorComponentMapping& mapping) {
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// Color constants are not swizzled with the exports; scalar constant alpha is unaffected.
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if (!mapping.IsIdentity() && (BlendFactorIsConstantColor(blend.color_srcblend) ||
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BlendFactorIsConstantColor(blend.color_destblend))) {
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return BlendMappingSupport::Unsupported;
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}
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if (mapping.Map(3) == 3u) {
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return BlendMappingSupport::Direct;
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}
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if (blend.separate_alpha_blend &&
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blend.color_srcblend == static_cast<uint8_t>(Prospero::BlendFactor::kSrcAlpha) &&
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blend.color_destblend == static_cast<uint8_t>(Prospero::BlendFactor::kOneMinusSrcAlpha) &&
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blend.alpha_destblend == blend.color_destblend &&
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blend.color_comb_fcn == static_cast<uint8_t>(Prospero::BlendOp::kAdd) &&
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blend.alpha_comb_fcn == blend.color_comb_fcn) {
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switch (static_cast<Prospero::BlendFactor>(blend.alpha_srcblend)) {
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case Prospero::BlendFactor::kZero: return BlendMappingSupport::SourceAlphaZero;
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case Prospero::BlendFactor::kOne: return BlendMappingSupport::SourceAlphaOne;
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default: break;
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}
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}
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// Moving alpha requires the same equation for all channels.
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if (blend.separate_alpha_blend && (blend.alpha_srcblend != blend.color_srcblend ||
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blend.alpha_destblend != blend.color_destblend ||
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blend.alpha_comb_fcn != blend.color_comb_fcn)) {
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return BlendMappingSupport::Unsupported;
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}
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auto support = BlendMappingSupport::Direct;
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for (const auto factor: {blend.color_srcblend, blend.color_destblend}) {
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if (BlendFactorIsDualSource(factor)) {
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return BlendMappingSupport::Unsupported;
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}
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switch (static_cast<Prospero::BlendFactor>(factor)) {
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case Prospero::BlendFactor::kSrcAlpha:
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case Prospero::BlendFactor::kOneMinusSrcAlpha:
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support = BlendMappingSupport::SourceAlpha;
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break;
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case Prospero::BlendFactor::kDstAlpha:
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case Prospero::BlendFactor::kOneMinusDstAlpha:
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case Prospero::BlendFactor::kSrcAlphaSaturate: return BlendMappingSupport::Unsupported;
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default: break;
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}
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}
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return support;
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}
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} // namespace Libs::Graphics
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