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implement proper blending

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This commit is contained in:
Samuliak 2024-07-03 11:37:44 +02:00
parent da8f2ff45d
commit dff6f5bf3f
3 changed files with 81 additions and 8 deletions
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30
include/renderer_mtl/mtl_pipeline_cache.hpp
View file

@ -7,8 +7,13 @@ using namespace PICA;
namespace Metal {
struct PipelineHash {
// Formats
ColorFmt colorFmt;
DepthFmt depthFmt;
// Blending
bool blendEnabled;
u32 blendControl;
};
// Bind the vertex buffer to binding 30 so that it doesn't occupy the lower indices
@ -34,7 +39,7 @@ public:
}
MTL::RenderPipelineState* get(PipelineHash hash) {
u8 intHash = (u8)hash.colorFmt << 4 | (u8)hash.depthFmt;
u64 intHash = ((u64)hash.colorFmt << 36) | ((u64)hash.depthFmt << 33) | ((u64)hash.blendEnabled << 32) | (u64)hash.blendControl;
auto& pipeline = pipelineCache[intHash];
if (!pipeline) {
MTL::RenderPipelineDescriptor* desc = MTL::RenderPipelineDescriptor::alloc()->init();
@ -44,11 +49,24 @@ public:
auto colorAttachment = desc->colorAttachments()->object(0);
colorAttachment->setPixelFormat(toMTLPixelFormatColor(hash.colorFmt));
if (hash.blendEnabled) {
const u8 rgbEquation = hash.blendControl & 0x7;
const u8 alphaEquation = Helpers::getBits<8, 3>(hash.blendControl);
// Get blending functions
const u8 rgbSourceFunc = Helpers::getBits<16, 4>(hash.blendControl);
const u8 rgbDestFunc = Helpers::getBits<20, 4>(hash.blendControl);
const u8 alphaSourceFunc = Helpers::getBits<24, 4>(hash.blendControl);
const u8 alphaDestFunc = Helpers::getBits<28, 4>(hash.blendControl);
colorAttachment->setBlendingEnabled(true);
colorAttachment->setSourceRGBBlendFactor(MTL::BlendFactorSourceAlpha);
colorAttachment->setDestinationRGBBlendFactor(MTL::BlendFactorOneMinusSourceAlpha);
colorAttachment->setSourceAlphaBlendFactor(MTL::BlendFactorSourceAlpha);
colorAttachment->setDestinationAlphaBlendFactor(MTL::BlendFactorOneMinusSourceAlpha);
colorAttachment->setRgbBlendOperation(toMTLBlendOperation(rgbEquation));
colorAttachment->setAlphaBlendOperation(toMTLBlendOperation(alphaEquation));
colorAttachment->setSourceRGBBlendFactor(toMTLBlendFactor(rgbSourceFunc));
colorAttachment->setDestinationRGBBlendFactor(toMTLBlendFactor(rgbDestFunc));
colorAttachment->setSourceAlphaBlendFactor(toMTLBlendFactor(alphaSourceFunc));
colorAttachment->setDestinationAlphaBlendFactor(toMTLBlendFactor(alphaDestFunc));
}
desc->setDepthAttachmentPixelFormat(toMTLPixelFormatDepth(hash.depthFmt));
@ -72,7 +90,7 @@ public:
}
private:
std::unordered_map<u8, MTL::RenderPipelineState*> pipelineCache;
std::unordered_map<u64, MTL::RenderPipelineState*> pipelineCache;
MTL::Device* device;
MTL::Function* vertexFunction;

40
include/renderer_mtl/pica_to_mtl.hpp
View file

@ -41,4 +41,44 @@ inline MTL::CompareFunction toMTLCompareFunc(u8 func) {
return MTL::CompareFunctionAlways;
}
inline MTL::BlendOperation toMTLBlendOperation(u8 op) {
switch (op) {
case 0: return MTL::BlendOperationAdd;
case 1: return MTL::BlendOperationSubtract;
case 2: return MTL::BlendOperationReverseSubtract;
case 3: return MTL::BlendOperationMin;
case 4: return MTL::BlendOperationMax;
case 5: return MTL::BlendOperationAdd; // Unused (same as 0)
case 6: return MTL::BlendOperationAdd; // Unused (same as 0)
case 7: return MTL::BlendOperationAdd; // Unused (same as 0)
default: panic("Unknown blend operation %u", op);
}
return MTL::BlendOperationAdd;
}
inline MTL::BlendFactor toMTLBlendFactor(u8 factor) {
switch (factor) {
case 0: return MTL::BlendFactorZero;
case 1: return MTL::BlendFactorOne;
case 2: return MTL::BlendFactorSourceColor;
case 3: return MTL::BlendFactorOneMinusSourceColor;
case 4: return MTL::BlendFactorDestinationColor;
case 5: return MTL::BlendFactorOneMinusDestinationColor;
case 6: return MTL::BlendFactorSourceAlpha;
case 7: return MTL::BlendFactorOneMinusSourceAlpha;
case 8: return MTL::BlendFactorDestinationAlpha;
case 9: return MTL::BlendFactorOneMinusDestinationAlpha;
case 10: return MTL::BlendFactorBlendColor;
case 11: return MTL::BlendFactorOneMinusBlendColor;
case 12: return MTL::BlendFactorBlendAlpha;
case 13: return MTL::BlendFactorOneMinusBlendAlpha;
case 14: return MTL::BlendFactorSourceAlphaSaturated;
case 15: return MTL::BlendFactorOne; // Undocumented
default: panic("Unknown blend factor %u", factor);
}
return MTL::BlendFactorOne;
}
} // namespace PICA

17
src/core/renderer_mtl/renderer_mtl.cpp
View file

@ -329,6 +329,7 @@ void RendererMTL::drawVertices(PICA::PrimType primType, std::span<const PICA::Ve
const bool depthWriteEnable = Helpers::getBit<12>(depthControl);
const u8 depthFunc = Helpers::getBits<4, 3>(depthControl);
const u8 colorMask = Helpers::getBits<8, 4>(depthControl);
// TODO: color mask
// gl.setColourMask(colorMask & 0x1, colorMask & 0x2, colorMask & 0x4, colorMask & 0x8);
const u32 stencilConfig = regs[PICA::InternalRegs::StencilTest];
@ -364,11 +365,25 @@ void RendererMTL::drawVertices(PICA::PrimType primType, std::span<const PICA::Ve
depthAttachment->setStoreAction(MTL::StoreActionStore);
}
// Pipeline
// -------- Pipeline --------
Metal::PipelineHash pipelineHash{colorRenderTarget->format, DepthFmt::Unknown1};
if (depthStencilRenderTarget) {
pipelineHash.depthFmt = depthStencilRenderTarget->format;
}
// Blending
pipelineHash.blendEnabled = (regs[PICA::InternalRegs::ColourOperation] & (1 << 8)) != 0;
if (pipelineHash.blendEnabled) {
pipelineHash.blendControl = regs[PICA::InternalRegs::BlendFunc];
// TODO: constant color
//pipelineHash.constantColor = regs[PICA::InternalRegs::BlendColour];
//const u8 r = pipelineHash.constantColor & 0xff;
//const u8 g = Helpers::getBits<8, 8>(pipelineHash.constantColor);
//const u8 b = Helpers::getBits<16, 8>(pipelineHash.constantColor);
//const u8 a = Helpers::getBits<24, 8>(pipelineHash.constantColor);
}
MTL::RenderPipelineState* pipeline = drawPipelineCache.get(pipelineHash);
// Depth stencil state