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D3D12 & Metal: Blend state conversions

This commit is contained in:
Austin Eng 2017-07-27 10:19:50 -04:00 committed by Austin Eng
parent 94bebe517d
commit 31fc0d234c
4 changed files with 172 additions and 0 deletions
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84
src/backend/d3d12/BlendStateD3D12.cpp
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@ -15,11 +15,95 @@
#include "backend/d3d12/BlendStateD3D12.h"
#include "backend/d3d12/D3D12Backend.h"
#include "common/Assert.h"
namespace backend {
namespace d3d12 {
namespace {
D3D12_BLEND D3D12Blend(nxt::BlendFactor factor) {
switch(factor) {
case nxt::BlendFactor::Zero:
return D3D12_BLEND_ZERO;
case nxt::BlendFactor::One:
return D3D12_BLEND_ONE;
case nxt::BlendFactor::SrcColor:
return D3D12_BLEND_SRC_COLOR;
case nxt::BlendFactor::OneMinusSrcColor:
return D3D12_BLEND_INV_SRC_COLOR;
case nxt::BlendFactor::SrcAlpha:
return D3D12_BLEND_SRC_ALPHA;
case nxt::BlendFactor::OneMinusSrcAlpha:
return D3D12_BLEND_INV_SRC_ALPHA;
case nxt::BlendFactor::DstColor:
return D3D12_BLEND_DEST_COLOR;
case nxt::BlendFactor::OneMinusDstColor:
return D3D12_BLEND_INV_DEST_COLOR;
case nxt::BlendFactor::DstAlpha:
return D3D12_BLEND_DEST_ALPHA;
case nxt::BlendFactor::OneMinusDstAlpha:
return D3D12_BLEND_INV_DEST_ALPHA;
case nxt::BlendFactor::SrcAlphaSaturated:
return D3D12_BLEND_SRC_ALPHA_SAT;
case nxt::BlendFactor::BlendColor:
return D3D12_BLEND_BLEND_FACTOR;
case nxt::BlendFactor::OneMinusBlendColor:
return D3D12_BLEND_INV_BLEND_FACTOR;
case nxt::BlendFactor::Src1Color:
return D3D12_BLEND_SRC1_COLOR;
case nxt::BlendFactor::OneMinusSrc1Color:
return D3D12_BLEND_INV_SRC1_COLOR;
case nxt::BlendFactor::Src1Alpha:
return D3D12_BLEND_SRC1_ALPHA;
case nxt::BlendFactor::OneMinusSrc1Alpha:
return D3D12_BLEND_INV_SRC1_ALPHA;
default:
UNREACHABLE();
}
}
D3D12_BLEND_OP D3D12BlendOperation(nxt::BlendOperation operation) {
switch(operation) {
case nxt::BlendOperation::Add:
return D3D12_BLEND_OP_ADD;
case nxt::BlendOperation::Subtract:
return D3D12_BLEND_OP_SUBTRACT;
case nxt::BlendOperation::ReverseSubtract:
return D3D12_BLEND_OP_REV_SUBTRACT;
case nxt::BlendOperation::Min:
return D3D12_BLEND_OP_MIN;
case nxt::BlendOperation::Max:
return D3D12_BLEND_OP_MAX;
default:
UNREACHABLE();
}
}
uint8_t D3D12RenderTargetWriteMask(nxt::ColorWriteMask colorWriteMask) {
static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(nxt::ColorWriteMask::Red) == D3D12_COLOR_WRITE_ENABLE_RED, "ColorWriteMask values must match");
static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(nxt::ColorWriteMask::Green) == D3D12_COLOR_WRITE_ENABLE_GREEN, "ColorWriteMask values must match");
static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(nxt::ColorWriteMask::Blue) == D3D12_COLOR_WRITE_ENABLE_BLUE, "ColorWriteMask values must match");
static_assert(static_cast<D3D12_COLOR_WRITE_ENABLE>(nxt::ColorWriteMask::Alpha) == D3D12_COLOR_WRITE_ENABLE_ALPHA, "ColorWriteMask values must match");
return static_cast<uint8_t>(colorWriteMask);
}
}
BlendState::BlendState(BlendStateBuilder* builder) : BlendStateBase(builder) {
auto& info = GetBlendInfo();
blendDesc.BlendEnable = info.blendEnabled;
blendDesc.SrcBlend = D3D12Blend(info.colorBlend.srcFactor);
blendDesc.DestBlend = D3D12Blend(info.colorBlend.dstFactor);
blendDesc.BlendOp = D3D12BlendOperation(info.colorBlend.operation);
blendDesc.SrcBlendAlpha = D3D12Blend(info.alphaBlend.srcFactor);
blendDesc.DestBlendAlpha = D3D12Blend(info.alphaBlend.dstFactor);
blendDesc.BlendOpAlpha = D3D12BlendOperation(info.alphaBlend.operation);
blendDesc.RenderTargetWriteMask = D3D12RenderTargetWriteMask(info.colorWriteMask);
blendDesc.LogicOpEnable = false;
blendDesc.LogicOp = D3D12_LOGIC_OP_NOOP;
}
const D3D12_RENDER_TARGET_BLEND_DESC& BlendState::GetD3D12BlendDesc() const {
return blendDesc;
}
}

7
src/backend/d3d12/BlendStateD3D12.h
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@ -17,12 +17,19 @@
#include "backend/BlendState.h"
#include "backend/d3d12/d3d12_platform.h"
namespace backend {
namespace d3d12 {
class BlendState : public BlendStateBase {
public:
BlendState(BlendStateBuilder* builder);
const D3D12_RENDER_TARGET_BLEND_DESC& GetD3D12BlendDesc() const;
private:
D3D12_RENDER_TARGET_BLEND_DESC blendDesc;
};
}

3
src/backend/metal/BlendStateMTL.h
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@ -17,12 +17,15 @@
#include "backend/BlendState.h"
#import <Metal/Metal.h>
namespace backend {
namespace metal {
class BlendState : public BlendStateBase {
public:
BlendState(BlendStateBuilder* builder);
void ApplyBlendState(MTLRenderPipelineColorAttachmentDescriptor* descriptor) const;
};
}

78
src/backend/metal/BlendStateMTL.mm
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@ -19,8 +19,86 @@
namespace backend {
namespace metal {
namespace {
MTLBlendFactor MetalBlendFactor(nxt::BlendFactor factor, bool alpha) {
switch(factor) {
case nxt::BlendFactor::Zero:
return MTLBlendFactorZero;
case nxt::BlendFactor::One:
return MTLBlendFactorOne;
case nxt::BlendFactor::SrcColor:
return MTLBlendFactorSourceColor;
case nxt::BlendFactor::OneMinusSrcColor:
return MTLBlendFactorOneMinusSourceColor;
case nxt::BlendFactor::SrcAlpha:
return MTLBlendFactorSourceAlpha;
case nxt::BlendFactor::OneMinusSrcAlpha:
return MTLBlendFactorOneMinusSourceAlpha;
case nxt::BlendFactor::DstColor:
return MTLBlendFactorDestinationColor;
case nxt::BlendFactor::OneMinusDstColor:
return MTLBlendFactorOneMinusDestinationColor;
case nxt::BlendFactor::DstAlpha:
return MTLBlendFactorDestinationAlpha;
case nxt::BlendFactor::OneMinusDstAlpha:
return MTLBlendFactorOneMinusDestinationAlpha;
case nxt::BlendFactor::SrcAlphaSaturated:
return MTLBlendFactorSourceAlphaSaturated;
case nxt::BlendFactor::BlendColor:
return alpha ? MTLBlendFactorBlendAlpha : MTLBlendFactorBlendColor;
case nxt::BlendFactor::OneMinusBlendColor:
return alpha ? MTLBlendFactorOneMinusBlendAlpha : MTLBlendFactorOneMinusBlendColor;
case nxt::BlendFactor::Src1Color:
return MTLBlendFactorSource1Color;
case nxt::BlendFactor::OneMinusSrc1Color:
return MTLBlendFactorOneMinusSource1Color;
case nxt::BlendFactor::Src1Alpha:
return MTLBlendFactorSource1Alpha;
case nxt::BlendFactor::OneMinusSrc1Alpha:
return MTLBlendFactorOneMinusSource1Alpha;
}
}
MTLBlendOperation MetalBlendOperation(nxt::BlendOperation operation) {
switch(operation) {
case nxt::BlendOperation::Add:
return MTLBlendOperationAdd;
case nxt::BlendOperation::Subtract:
return MTLBlendOperationSubtract;
case nxt::BlendOperation::ReverseSubtract:
return MTLBlendOperationReverseSubtract;
case nxt::BlendOperation::Min:
return MTLBlendOperationMin;
case nxt::BlendOperation::Max:
return MTLBlendOperationMax;
}
}
MTLColorWriteMask MetalColorWriteMask(nxt::ColorWriteMask colorWriteMask) {
return (
((colorWriteMask & nxt::ColorWriteMask::Red) != nxt::ColorWriteMask::None ? MTLColorWriteMaskRed : MTLColorWriteMaskNone) |
((colorWriteMask & nxt::ColorWriteMask::Green) != nxt::ColorWriteMask::None ? MTLColorWriteMaskGreen : MTLColorWriteMaskNone) |
((colorWriteMask & nxt::ColorWriteMask::Blue) != nxt::ColorWriteMask::None ? MTLColorWriteMaskBlue : MTLColorWriteMaskNone) |
((colorWriteMask & nxt::ColorWriteMask::Alpha) != nxt::ColorWriteMask::None ? MTLColorWriteMaskAlpha : MTLColorWriteMaskNone)
);
}
}
BlendState::BlendState(BlendStateBuilder* builder) : BlendStateBase(builder) {
}
void BlendState::ApplyBlendState(MTLRenderPipelineColorAttachmentDescriptor* descriptor) const {
auto& info = GetBlendInfo();
descriptor.blendingEnabled = info.blendEnabled;
descriptor.sourceRGBBlendFactor = MetalBlendFactor(info.colorBlend.srcFactor, false);
descriptor.destinationRGBBlendFactor = MetalBlendFactor(info.colorBlend.dstFactor, false);
descriptor.rgbBlendOperation = MetalBlendOperation(info.colorBlend.operation);
descriptor.sourceAlphaBlendFactor = MetalBlendFactor(info.alphaBlend.srcFactor, true);
descriptor.destinationAlphaBlendFactor = MetalBlendFactor(info.alphaBlend.dstFactor, true);
descriptor.alphaBlendOperation = MetalBlendOperation(info.alphaBlend.operation);
descriptor.writeMask = MetalColorWriteMask(info.colorWriteMask);
}
}
}