// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "PixelRoutine.hpp"

#include "Constants.hpp"
#include "SamplerCore.hpp"
#include "Device/Primitive.hpp"
#include "Device/QuadRasterizer.hpp"
#include "Device/Renderer.hpp"
#include "System/Debug.hpp"
#include "Vulkan/VkPipelineLayout.hpp"

namespace sw {

PixelRoutine::PixelRoutine(
    const PixelProcessor::State &state,
    vk::PipelineLayout const *pipelineLayout,
    SpirvShader const *spirvShader,
    const vk::DescriptorSet::Bindings &descriptorSets)
    : QuadRasterizer(state, spirvShader)
    , routine(pipelineLayout)
    , descriptorSets(descriptorSets)
{
	if(spirvShader)
	{
		spirvShader->emitProlog(&routine);

		// Clearing inputs to 0 is not demanded by the spec,
		// but it makes the undefined behavior deterministic.
		for(int i = 0; i < MAX_INTERFACE_COMPONENTS; i++)
		{
			routine.inputs[i] = Float4(0.0f);
		}
	}

	for(int i = 0; i < RENDERTARGETS; i++)
	{
		outputMasks[i] = 0xF;
	}
}

PixelRoutine::~PixelRoutine()
{
}

void PixelRoutine::quad(Pointer<Byte> cBuffer[RENDERTARGETS], Pointer<Byte> &zBuffer, Pointer<Byte> &sBuffer, Int cMask[4], Int &x, Int &y)
{
	const bool earlyDepthTest = !spirvShader || spirvShader->getModes().EarlyFragmentTests;

	Int zMask[4];  // Depth mask
	Int sMask[4];  // Stencil mask

	bool sampleShadingEnabled = state.sampleShadingEnabled;
	float minSampleShading = state.minSampleShading;
	if(spirvShader)
	{
		// SampleId and SamplePosition built-ins require the sampleRateShading feature, so the Vulkan spec
		// requires turning on per sample shading if either of them is present in the shader.

		// "If a fragment shader entry point's interface includes an input variable decorated with SampleId,
		//  Sample Shading is considered enabled with a minSampleShading value of 1.0."

		// "If a fragment shader entry point's interface includes an input variable decorated with SamplePosition,
		//  Sample Shading is considered enabled with a minSampleShading value of 1.0."
		if(spirvShader->hasBuiltinInput(spv::BuiltInSampleId) || spirvShader->hasBuiltinInput(spv::BuiltInSamplePosition))
		{
			sampleShadingEnabled = true;
			minSampleShading = 1.0f;
		}
	}

	bool shaderContainsInterpolation = spirvShader && spirvShader->getUsedCapabilities().InterpolationFunction;
	bool shaderContainsSampleQualifier = spirvShader && spirvShader->getModes().ContainsSampleQualifier;
	bool perSampleShading = (sampleShadingEnabled && (minSampleShading > 0.0f)) ||
	                        shaderContainsInterpolation || shaderContainsSampleQualifier;
	unsigned int numSampleRenders = perSampleShading ? state.multiSampleCount : 1;

	for(unsigned int i = 0; i < numSampleRenders; ++i)
	{
		int sampleId = perSampleShading ? i : -1;
		unsigned int sampleLoopInit = perSampleShading ? sampleId : 0;
		unsigned int sampleLoopEnd = perSampleShading ? sampleId + 1 : state.multiSampleCount;

		for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
		{
			zMask[q] = cMask[q];
			sMask[q] = cMask[q];
		}

		for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
		{
			stencilTest(sBuffer, q, x, sMask[q], cMask[q]);
		}

		Float4 f;
		Float4 rhwCentroid;

		Float4 xxxx = Float4(Float(x)) + *Pointer<Float4>(primitive + OFFSET(Primitive, xQuad), 16);

		if(interpolateZ())
		{
			for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
			{
				Float4 x = xxxx;

				if(state.enableMultiSampling)
				{
					x -= *Pointer<Float4>(constants + OFFSET(Constants, X) + q * sizeof(float4));
				}

				z[q] = interpolate(x, Dz[q], z[q], primitive + OFFSET(Primitive, z), false, false);

				if(state.depthBias)
				{
					z[q] += *Pointer<Float4>(primitive + OFFSET(Primitive, zBias), 16);
				}

				if(state.depthClamp)
				{
					z[q] = Min(Max(z[q], Float4(0.0f)), Float4(1.0f));
				}
			}
		}

		Bool depthPass = false;

		if(earlyDepthTest)
		{
			for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
			{
				depthPass = depthPass || depthTest(zBuffer, q, x, z[q], sMask[q], zMask[q], cMask[q]);
			}
		}

		If(depthPass || Bool(!earlyDepthTest))
		{
			Float4 yyyy = Float4(Float(y)) + *Pointer<Float4>(primitive + OFFSET(Primitive, yQuad), 16);

			// Centroid locations
			Float4 XXXX = Float4(0.0f);
			Float4 YYYY = Float4(0.0f);

			if(state.centroid || shaderContainsInterpolation)
			{
				Float4 WWWW(1.0e-9f);

				for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
				{
					XXXX += *Pointer<Float4>(constants + OFFSET(Constants, sampleX[q]) + 16 * cMask[q]);
					YYYY += *Pointer<Float4>(constants + OFFSET(Constants, sampleY[q]) + 16 * cMask[q]);
					WWWW += *Pointer<Float4>(constants + OFFSET(Constants, weight) + 16 * cMask[q]);
				}

				WWWW = Rcp(WWWW, Precision::Relaxed);
				XXXX *= WWWW;
				YYYY *= WWWW;

				XXXX += xxxx;
				YYYY += yyyy;
			}

			if(interpolateW())
			{
				w = interpolate(xxxx, Dw, rhw, primitive + OFFSET(Primitive, w), false, false);
				rhw = reciprocal(w, false, false, true);

				if(state.centroid || shaderContainsInterpolation)
				{
					rhwCentroid = reciprocal(SpirvRoutine::interpolateAtXY(XXXX, YYYY, rhwCentroid, primitive + OFFSET(Primitive, w), false, false));
				}
			}

			if(spirvShader)
			{
				if(shaderContainsInterpolation)
				{
					routine.interpolationData.primitive = primitive;

					routine.interpolationData.x = xxxx;
					routine.interpolationData.y = yyyy;
					routine.interpolationData.rhw = rhw;

					routine.interpolationData.xCentroid = XXXX;
					routine.interpolationData.yCentroid = YYYY;
					routine.interpolationData.rhwCentroid = rhwCentroid;
				}

				if(perSampleShading && (state.multiSampleCount > 1))
				{
					xxxx += Float4(Constants::SampleLocationsX[sampleId]);
					yyyy += Float4(Constants::SampleLocationsY[sampleId]);
				}

				for(int interpolant = 0; interpolant < MAX_INTERFACE_COMPONENTS; interpolant++)
				{
					auto const &input = spirvShader->inputs[interpolant];
					if(input.Type != SpirvShader::ATTRIBTYPE_UNUSED)
					{
						if(input.Centroid && state.enableMultiSampling)
						{
							routine.inputs[interpolant] =
							    SpirvRoutine::interpolateAtXY(XXXX, YYYY, rhwCentroid,
							                                  primitive + OFFSET(Primitive, V[interpolant]),
							                                  input.Flat, !input.NoPerspective);
						}
						else if(perSampleShading)
						{
							routine.inputs[interpolant] =
							    SpirvRoutine::interpolateAtXY(xxxx, yyyy, rhw,
							                                  primitive + OFFSET(Primitive, V[interpolant]),
							                                  input.Flat, !input.NoPerspective);
						}
						else
						{
							routine.inputs[interpolant] =
							    interpolate(xxxx, Dv[interpolant], rhw,
							                primitive + OFFSET(Primitive, V[interpolant]),
							                input.Flat, !input.NoPerspective);
						}
					}
				}

				setBuiltins(x, y, z, w, cMask, sampleId);

				for(uint32_t i = 0; i < state.numClipDistances; i++)
				{
					auto distance = interpolate(xxxx, DclipDistance[i], rhw,
					                            primitive + OFFSET(Primitive, clipDistance[i]),
					                            false, true);

					auto clipMask = SignMask(CmpGE(distance, SIMD::Float(0)));
					for(auto ms = sampleLoopInit; ms < sampleLoopEnd; ms++)
					{
						// FIXME(b/148105887): Fragments discarded by clipping do not exist at
						// all -- they should not be counted in queries or have their Z/S effects
						// performed when early fragment tests are enabled.
						cMask[ms] &= clipMask;
					}

					if(spirvShader->getUsedCapabilities().ClipDistance)
					{
						auto it = spirvShader->inputBuiltins.find(spv::BuiltInClipDistance);
						if(it != spirvShader->inputBuiltins.end())
						{
							if(i < it->second.SizeInComponents)
							{
								routine.getVariable(it->second.Id)[it->second.FirstComponent + i] = distance;
							}
						}
					}
				}

				if(spirvShader->getUsedCapabilities().CullDistance)
				{
					auto it = spirvShader->inputBuiltins.find(spv::BuiltInCullDistance);
					if(it != spirvShader->inputBuiltins.end())
					{
						for(uint32_t i = 0; i < state.numCullDistances; i++)
						{
							if(i < it->second.SizeInComponents)
							{
								routine.getVariable(it->second.Id)[it->second.FirstComponent + i] =
								    interpolate(xxxx, DcullDistance[i], rhw,
								                primitive + OFFSET(Primitive, cullDistance[i]),
								                false, true);
							}
						}
					}
				}
			}

			Bool alphaPass = true;

			if(spirvShader)
			{
				bool earlyFragTests = (spirvShader && spirvShader->getModes().EarlyFragmentTests);
				applyShader(cMask, earlyFragTests ? sMask : cMask, earlyDepthTest ? zMask : cMask, sampleId);
			}

			alphaPass = alphaTest(cMask, sampleId);

			if((spirvShader && spirvShader->getModes().ContainsKill) || state.alphaToCoverage)
			{
				for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
				{
					zMask[q] &= cMask[q];
					sMask[q] &= cMask[q];
				}
			}

			If(alphaPass)
			{
				if(!earlyDepthTest)
				{
					for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
					{
						depthPass = depthPass || depthTest(zBuffer, q, x, z[q], sMask[q], zMask[q], cMask[q]);
					}
				}

				If(depthPass || Bool(earlyDepthTest))
				{
					for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
					{
						if(state.multiSampleMask & (1 << q))
						{
							writeDepth(zBuffer, q, x, z[q], zMask[q]);

							if(state.occlusionEnabled)
							{
								occlusion += *Pointer<UInt>(constants + OFFSET(Constants, occlusionCount) + 4 * (zMask[q] & sMask[q]));
							}
						}
					}

					rasterOperation(cBuffer, x, sMask, zMask, cMask, sampleId);
				}
			}
		}

		for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
		{
			if(state.multiSampleMask & (1 << q))
			{
				writeStencil(sBuffer, q, x, sMask[q], zMask[q], cMask[q]);
			}
		}
	}
}

void PixelRoutine::stencilTest(const Pointer<Byte> &sBuffer, int q, const Int &x, Int &sMask, const Int &cMask)
{
	if(!state.stencilActive)
	{
		return;
	}

	// (StencilRef & StencilMask) CompFunc (StencilBufferValue & StencilMask)

	Pointer<Byte> buffer = sBuffer + x;

	if(q > 0)
	{
		buffer += q * *Pointer<Int>(data + OFFSET(DrawData, stencilSliceB));
	}

	Int pitch = *Pointer<Int>(data + OFFSET(DrawData, stencilPitchB));
	Byte8 value = *Pointer<Byte8>(buffer) & Byte8(-1, -1, 0, 0, 0, 0, 0, 0);
	value = value | (*Pointer<Byte8>(buffer + pitch - 2) & Byte8(0, 0, -1, -1, 0, 0, 0, 0));
	Byte8 valueBack = value;

	if(state.frontStencil.compareMask != 0xff)
	{
		value &= *Pointer<Byte8>(data + OFFSET(DrawData, stencil[0].testMaskQ));
	}

	stencilTest(value, state.frontStencil.compareOp, false);

	if(state.backStencil.compareMask != 0xff)
	{
		valueBack &= *Pointer<Byte8>(data + OFFSET(DrawData, stencil[1].testMaskQ));
	}

	stencilTest(valueBack, state.backStencil.compareOp, true);

	value &= *Pointer<Byte8>(primitive + OFFSET(Primitive, clockwiseMask));
	valueBack &= *Pointer<Byte8>(primitive + OFFSET(Primitive, invClockwiseMask));
	value |= valueBack;

	sMask = SignMask(value) & cMask;
}

void PixelRoutine::stencilTest(Byte8 &value, VkCompareOp stencilCompareMode, bool isBack)
{
	Byte8 equal;

	switch(stencilCompareMode)
	{
		case VK_COMPARE_OP_ALWAYS:
			value = Byte8(0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF);
			break;
		case VK_COMPARE_OP_NEVER:
			value = Byte8(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
			break;
		case VK_COMPARE_OP_LESS:  // a < b ~ b > a
			value += Byte8(0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80);
			value = CmpGT(As<SByte8>(value), *Pointer<SByte8>(data + OFFSET(DrawData, stencil[isBack].referenceMaskedSignedQ)));
			break;
		case VK_COMPARE_OP_EQUAL:
			value = CmpEQ(value, *Pointer<Byte8>(data + OFFSET(DrawData, stencil[isBack].referenceMaskedQ)));
			break;
		case VK_COMPARE_OP_NOT_EQUAL:  // a != b ~ !(a == b)
			value = CmpEQ(value, *Pointer<Byte8>(data + OFFSET(DrawData, stencil[isBack].referenceMaskedQ)));
			value ^= Byte8(0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF);
			break;
		case VK_COMPARE_OP_LESS_OR_EQUAL:  // a <= b ~ (b > a) || (a == b)
			equal = value;
			equal = CmpEQ(equal, *Pointer<Byte8>(data + OFFSET(DrawData, stencil[isBack].referenceMaskedQ)));
			value += Byte8(0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80);
			value = CmpGT(As<SByte8>(value), *Pointer<SByte8>(data + OFFSET(DrawData, stencil[isBack].referenceMaskedSignedQ)));
			value |= equal;
			break;
		case VK_COMPARE_OP_GREATER:  // a > b
			equal = *Pointer<Byte8>(data + OFFSET(DrawData, stencil[isBack].referenceMaskedSignedQ));
			value += Byte8(0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80);
			equal = CmpGT(As<SByte8>(equal), As<SByte8>(value));
			value = equal;
			break;
		case VK_COMPARE_OP_GREATER_OR_EQUAL:  // a >= b ~ !(a < b) ~ !(b > a)
			value += Byte8(0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80);
			value = CmpGT(As<SByte8>(value), *Pointer<SByte8>(data + OFFSET(DrawData, stencil[isBack].referenceMaskedSignedQ)));
			value ^= Byte8(0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF);
			break;
		default:
			UNSUPPORTED("VkCompareOp: %d", int(stencilCompareMode));
	}
}

Bool PixelRoutine::depthTest32F(const Pointer<Byte> &zBuffer, int q, const Int &x, const Float4 &z, const Int &sMask, Int &zMask, const Int &cMask)
{
	Float4 Z = z;

	if(spirvShader && spirvShader->getModes().DepthReplacing)
	{
		Z = oDepth;
	}

	Pointer<Byte> buffer = zBuffer + 4 * x;
	Int pitch = *Pointer<Int>(data + OFFSET(DrawData, depthPitchB));

	if(q > 0)
	{
		buffer += q * *Pointer<Int>(data + OFFSET(DrawData, depthSliceB));
	}

	Float4 zValue;

	if(state.depthCompareMode != VK_COMPARE_OP_NEVER || (state.depthCompareMode != VK_COMPARE_OP_ALWAYS && !state.depthWriteEnable))
	{
		zValue = Float4(*Pointer<Float2>(buffer), *Pointer<Float2>(buffer + pitch));
	}

	Int4 zTest;

	switch(state.depthCompareMode)
	{
		case VK_COMPARE_OP_ALWAYS:
			// Optimized
			break;
		case VK_COMPARE_OP_NEVER:
			// Optimized
			break;
		case VK_COMPARE_OP_EQUAL:
			zTest = CmpEQ(zValue, Z);
			break;
		case VK_COMPARE_OP_NOT_EQUAL:
			zTest = CmpNEQ(zValue, Z);
			break;
		case VK_COMPARE_OP_LESS:
			zTest = CmpNLE(zValue, Z);
			break;
		case VK_COMPARE_OP_GREATER_OR_EQUAL:
			zTest = CmpLE(zValue, Z);
			break;
		case VK_COMPARE_OP_LESS_OR_EQUAL:
			zTest = CmpNLT(zValue, Z);
			break;
		case VK_COMPARE_OP_GREATER:
			zTest = CmpLT(zValue, Z);
			break;
		default:
			UNSUPPORTED("VkCompareOp: %d", int(state.depthCompareMode));
	}

	switch(state.depthCompareMode)
	{
		case VK_COMPARE_OP_ALWAYS:
			zMask = cMask;
			break;
		case VK_COMPARE_OP_NEVER:
			zMask = 0x0;
			break;
		default:
			zMask = SignMask(zTest) & cMask;
			break;
	}

	if(state.stencilActive)
	{
		zMask &= sMask;
	}

	return zMask != 0;
}

Bool PixelRoutine::depthTest16(const Pointer<Byte> &zBuffer, int q, const Int &x, const Float4 &z, const Int &sMask, Int &zMask, const Int &cMask)
{
	Short4 Z = convertFixed16(z, true);

	if(spirvShader && spirvShader->getModes().DepthReplacing)
	{
		Z = convertFixed16(oDepth, true);
	}

	Pointer<Byte> buffer = zBuffer + 2 * x;
	Int pitch = *Pointer<Int>(data + OFFSET(DrawData, depthPitchB));

	if(q > 0)
	{
		buffer += q * *Pointer<Int>(data + OFFSET(DrawData, depthSliceB));
	}

	Short4 zValue;

	if(state.depthCompareMode != VK_COMPARE_OP_NEVER || (state.depthCompareMode != VK_COMPARE_OP_ALWAYS && !state.depthWriteEnable))
	{
		zValue = As<Short4>(Insert(As<Int2>(zValue), *Pointer<Int>(buffer), 0));
		zValue = As<Short4>(Insert(As<Int2>(zValue), *Pointer<Int>(buffer + pitch), 1));
	}

	Int4 zTest;

	// Bias values to make unsigned compares out of Reactor's (due SSE's) signed compares only
	zValue = zValue - Short4(0x8000u);
	Z = Z - Short4(0x8000u);

	switch(state.depthCompareMode)
	{
		case VK_COMPARE_OP_ALWAYS:
			// Optimized
			break;
		case VK_COMPARE_OP_NEVER:
			// Optimized
			break;
		case VK_COMPARE_OP_EQUAL:
			zTest = Int4(CmpEQ(zValue, Z));
			break;
		case VK_COMPARE_OP_NOT_EQUAL:
			zTest = ~Int4(CmpEQ(zValue, Z));
			break;
		case VK_COMPARE_OP_LESS:
			zTest = Int4(CmpGT(zValue, Z));
			break;
		case VK_COMPARE_OP_GREATER_OR_EQUAL:
			zTest = ~Int4(CmpGT(zValue, Z));
			break;
		case VK_COMPARE_OP_LESS_OR_EQUAL:
			zTest = ~Int4(CmpGT(Z, zValue));
			break;
		case VK_COMPARE_OP_GREATER:
			zTest = Int4(CmpGT(Z, zValue));
			break;
		default:
			UNSUPPORTED("VkCompareOp: %d", int(state.depthCompareMode));
	}

	switch(state.depthCompareMode)
	{
		case VK_COMPARE_OP_ALWAYS:
			zMask = cMask;
			break;
		case VK_COMPARE_OP_NEVER:
			zMask = 0x0;
			break;
		default:
			zMask = SignMask(zTest) & cMask;
			break;
	}

	if(state.stencilActive)
	{
		zMask &= sMask;
	}

	return zMask != 0;
}

Bool PixelRoutine::depthTest(const Pointer<Byte> &zBuffer, int q, const Int &x, const Float4 &z, const Int &sMask, Int &zMask, const Int &cMask)
{
	if(!state.depthTestActive)
	{
		return true;
	}

	if(state.depthFormat == VK_FORMAT_D16_UNORM)
	{
		return depthTest16(zBuffer, q, x, z, sMask, zMask, cMask);
	}
	else
	{
		return depthTest32F(zBuffer, q, x, z, sMask, zMask, cMask);
	}
}

void PixelRoutine::alphaToCoverage(Int cMask[4], const Float4 &alpha, int sampleId)
{
	static const int a2c[4] = {
		OFFSET(DrawData, a2c0),
		OFFSET(DrawData, a2c1),
		OFFSET(DrawData, a2c2),
		OFFSET(DrawData, a2c3),
	};

	unsigned int sampleLoopInit = (sampleId >= 0) ? sampleId : 0;
	unsigned int sampleLoopEnd = (sampleId >= 0) ? sampleId + 1 : state.multiSampleCount;

	for(unsigned int q = sampleLoopInit; q < sampleLoopEnd; q++)
	{
		Int4 coverage = CmpNLT(alpha, *Pointer<Float4>(data + a2c[q]));
		Int aMask = SignMask(coverage);
		cMask[q] &= aMask;
	}
}

void PixelRoutine::writeDepth32F(Pointer<Byte> &zBuffer, int q, const Int &x, const Float4 &z, const Int &zMask)
{
	Float4 Z = z;

	if(spirvShader && spirvShader->getModes().DepthReplacing)
	{
		Z = oDepth;
	}

	Pointer<Byte> buffer = zBuffer + 4 * x;
	Int pitch = *Pointer<Int>(data + OFFSET(DrawData, depthPitchB));

	if(q > 0)
	{
		buffer += q * *Pointer<Int>(data + OFFSET(DrawData, depthSliceB));
	}

	Float4 zValue;

	if(state.depthCompareMode != VK_COMPARE_OP_NEVER || (state.depthCompareMode != VK_COMPARE_OP_ALWAYS && !state.depthWriteEnable))
	{
		zValue = Float4(*Pointer<Float2>(buffer), *Pointer<Float2>(buffer + pitch));
	}

	Z = As<Float4>(As<Int4>(Z) & *Pointer<Int4>(constants + OFFSET(Constants, maskD4X) + zMask * 16, 16));
	zValue = As<Float4>(As<Int4>(zValue) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskD4X) + zMask * 16, 16));
	Z = As<Float4>(As<Int4>(Z) | As<Int4>(zValue));

	*Pointer<Float2>(buffer) = Float2(Z.xy);
	*Pointer<Float2>(buffer + pitch) = Float2(Z.zw);
}

void PixelRoutine::writeDepth16(Pointer<Byte> &zBuffer, int q, const Int &x, const Float4 &z, const Int &zMask)
{
	Short4 Z = As<Short4>(convertFixed16(z, true));

	if(spirvShader && spirvShader->getModes().DepthReplacing)
	{
		Z = As<Short4>(convertFixed16(oDepth, true));
	}

	Pointer<Byte> buffer = zBuffer + 2 * x;
	Int pitch = *Pointer<Int>(data + OFFSET(DrawData, depthPitchB));

	if(q > 0)
	{
		buffer += q * *Pointer<Int>(data + OFFSET(DrawData, depthSliceB));
	}

	Short4 zValue;

	if(state.depthCompareMode != VK_COMPARE_OP_NEVER || (state.depthCompareMode != VK_COMPARE_OP_ALWAYS && !state.depthWriteEnable))
	{
		zValue = As<Short4>(Insert(As<Int2>(zValue), *Pointer<Int>(buffer), 0));
		zValue = As<Short4>(Insert(As<Int2>(zValue), *Pointer<Int>(buffer + pitch), 1));
	}

	Z = Z & *Pointer<Short4>(constants + OFFSET(Constants, maskW4Q) + zMask * 8, 8);
	zValue = zValue & *Pointer<Short4>(constants + OFFSET(Constants, invMaskW4Q) + zMask * 8, 8);
	Z = Z | zValue;

	*Pointer<Int>(buffer) = Extract(As<Int2>(Z), 0);
	*Pointer<Int>(buffer + pitch) = Extract(As<Int2>(Z), 1);
}

void PixelRoutine::writeDepth(Pointer<Byte> &zBuffer, int q, const Int &x, const Float4 &z, const Int &zMask)
{
	if(!state.depthWriteEnable)
	{
		return;
	}

	if(state.depthFormat == VK_FORMAT_D16_UNORM)
	{
		writeDepth16(zBuffer, q, x, z, zMask);
	}
	else
	{
		writeDepth32F(zBuffer, q, x, z, zMask);
	}
}

void PixelRoutine::writeStencil(Pointer<Byte> &sBuffer, int q, const Int &x, const Int &sMask, const Int &zMask, const Int &cMask)
{
	if(!state.stencilActive)
	{
		return;
	}

	if(state.frontStencil.passOp == VK_STENCIL_OP_KEEP && state.frontStencil.depthFailOp == VK_STENCIL_OP_KEEP && state.frontStencil.failOp == VK_STENCIL_OP_KEEP)
	{
		if(state.backStencil.passOp == VK_STENCIL_OP_KEEP && state.backStencil.depthFailOp == VK_STENCIL_OP_KEEP && state.backStencil.failOp == VK_STENCIL_OP_KEEP)
		{
			return;
		}
	}

	if((state.frontStencil.writeMask == 0) && (state.backStencil.writeMask == 0))
	{
		return;
	}

	Pointer<Byte> buffer = sBuffer + x;

	if(q > 0)
	{
		buffer += q * *Pointer<Int>(data + OFFSET(DrawData, stencilSliceB));
	}

	Int pitch = *Pointer<Int>(data + OFFSET(DrawData, stencilPitchB));
	Byte8 bufferValue = *Pointer<Byte8>(buffer) & Byte8(-1, -1, 0, 0, 0, 0, 0, 0);
	bufferValue = bufferValue | (*Pointer<Byte8>(buffer + pitch - 2) & Byte8(0, 0, -1, -1, 0, 0, 0, 0));
	Byte8 newValue;
	stencilOperation(newValue, bufferValue, state.frontStencil, false, zMask, sMask);

	if((state.frontStencil.writeMask & 0xFF) != 0xFF)  // Assume 8-bit stencil buffer
	{
		Byte8 maskedValue = bufferValue;
		newValue &= *Pointer<Byte8>(data + OFFSET(DrawData, stencil[0].writeMaskQ));
		maskedValue &= *Pointer<Byte8>(data + OFFSET(DrawData, stencil[0].invWriteMaskQ));
		newValue |= maskedValue;
	}

	Byte8 newValueBack;

	stencilOperation(newValueBack, bufferValue, state.backStencil, true, zMask, sMask);

	if((state.backStencil.writeMask & 0xFF) != 0xFF)  // Assume 8-bit stencil buffer
	{
		Byte8 maskedValue = bufferValue;
		newValueBack &= *Pointer<Byte8>(data + OFFSET(DrawData, stencil[1].writeMaskQ));
		maskedValue &= *Pointer<Byte8>(data + OFFSET(DrawData, stencil[1].invWriteMaskQ));
		newValueBack |= maskedValue;
	}

	newValue &= *Pointer<Byte8>(primitive + OFFSET(Primitive, clockwiseMask));
	newValueBack &= *Pointer<Byte8>(primitive + OFFSET(Primitive, invClockwiseMask));
	newValue |= newValueBack;

	newValue &= *Pointer<Byte8>(constants + OFFSET(Constants, maskB4Q) + 8 * cMask);
	bufferValue &= *Pointer<Byte8>(constants + OFFSET(Constants, invMaskB4Q) + 8 * cMask);
	newValue |= bufferValue;

	*Pointer<Short>(buffer) = Extract(As<Short4>(newValue), 0);
	*Pointer<Short>(buffer + pitch) = Extract(As<Short4>(newValue), 1);
}

void PixelRoutine::stencilOperation(Byte8 &newValue, const Byte8 &bufferValue, const PixelProcessor::States::StencilOpState &ops, bool isBack, const Int &zMask, const Int &sMask)
{
	Byte8 &pass = newValue;
	Byte8 fail;
	Byte8 zFail;

	stencilOperation(pass, bufferValue, ops.passOp, isBack);

	if(ops.depthFailOp != ops.passOp)
	{
		stencilOperation(zFail, bufferValue, ops.depthFailOp, isBack);
	}

	if(ops.failOp != ops.passOp || ops.failOp != ops.depthFailOp)
	{
		stencilOperation(fail, bufferValue, ops.failOp, isBack);
	}

	if(ops.failOp != ops.passOp || ops.failOp != ops.depthFailOp)
	{
		if(state.depthTestActive && ops.depthFailOp != ops.passOp)  // zMask valid and values not the same
		{
			pass &= *Pointer<Byte8>(constants + OFFSET(Constants, maskB4Q) + 8 * zMask);
			zFail &= *Pointer<Byte8>(constants + OFFSET(Constants, invMaskB4Q) + 8 * zMask);
			pass |= zFail;
		}

		pass &= *Pointer<Byte8>(constants + OFFSET(Constants, maskB4Q) + 8 * sMask);
		fail &= *Pointer<Byte8>(constants + OFFSET(Constants, invMaskB4Q) + 8 * sMask);
		pass |= fail;
	}
}

Byte8 PixelRoutine::stencilReplaceRef(bool isBack)
{
	if(spirvShader)
	{
		auto it = spirvShader->outputBuiltins.find(spv::BuiltInFragStencilRefEXT);
		if(it != spirvShader->outputBuiltins.end())
		{
			UInt4 sRef = As<UInt4>(routine.getVariable(it->second.Id)[it->second.FirstComponent]) & UInt4(0xff);
			// TODO (b/148295813): Could be done with a single pshufb instruction. Optimize the
			//                     following line by either adding a rr::Shuffle() variant to do
			//                     it explicitly or adding a Byte4(Int4) constructor would work.
			sRef.x = rr::UInt(sRef.x) | (rr::UInt(sRef.y) << 8) | (rr::UInt(sRef.z) << 16) | (rr::UInt(sRef.w) << 24);

			UInt2 sRefDuplicated;
			sRefDuplicated = Insert(sRefDuplicated, sRef.x, 0);
			sRefDuplicated = Insert(sRefDuplicated, sRef.x, 1);
			return As<Byte8>(sRefDuplicated);
		}
	}

	return *Pointer<Byte8>(data + OFFSET(DrawData, stencil[isBack].referenceQ));
}

void PixelRoutine::stencilOperation(Byte8 &output, const Byte8 &bufferValue, VkStencilOp operation, bool isBack)
{
	switch(operation)
	{
		case VK_STENCIL_OP_KEEP:
			output = bufferValue;
			break;
		case VK_STENCIL_OP_ZERO:
			output = Byte8(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
			break;
		case VK_STENCIL_OP_REPLACE:
			output = stencilReplaceRef(isBack);
			break;
		case VK_STENCIL_OP_INCREMENT_AND_CLAMP:
			output = AddSat(bufferValue, Byte8(1, 1, 1, 1, 1, 1, 1, 1));
			break;
		case VK_STENCIL_OP_DECREMENT_AND_CLAMP:
			output = SubSat(bufferValue, Byte8(1, 1, 1, 1, 1, 1, 1, 1));
			break;
		case VK_STENCIL_OP_INVERT:
			output = bufferValue ^ Byte8(0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF);
			break;
		case VK_STENCIL_OP_INCREMENT_AND_WRAP:
			output = bufferValue + Byte8(1, 1, 1, 1, 1, 1, 1, 1);
			break;
		case VK_STENCIL_OP_DECREMENT_AND_WRAP:
			output = bufferValue - Byte8(1, 1, 1, 1, 1, 1, 1, 1);
			break;
		default:
			UNSUPPORTED("VkStencilOp: %d", int(operation));
	}
}

void PixelRoutine::blendFactor(Vector4s &blendFactor, const Vector4s &current, const Vector4s &pixel, VkBlendFactor blendFactorActive)
{
	switch(blendFactorActive)
	{
		case VK_BLEND_FACTOR_ZERO:
			// Optimized
			break;
		case VK_BLEND_FACTOR_ONE:
			// Optimized
			break;
		case VK_BLEND_FACTOR_SRC_COLOR:
			blendFactor.x = current.x;
			blendFactor.y = current.y;
			blendFactor.z = current.z;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_SRC_COLOR:
			blendFactor.x = Short4(0xFFFFu) - current.x;
			blendFactor.y = Short4(0xFFFFu) - current.y;
			blendFactor.z = Short4(0xFFFFu) - current.z;
			break;
		case VK_BLEND_FACTOR_DST_COLOR:
			blendFactor.x = pixel.x;
			blendFactor.y = pixel.y;
			blendFactor.z = pixel.z;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_DST_COLOR:
			blendFactor.x = Short4(0xFFFFu) - pixel.x;
			blendFactor.y = Short4(0xFFFFu) - pixel.y;
			blendFactor.z = Short4(0xFFFFu) - pixel.z;
			break;
		case VK_BLEND_FACTOR_SRC_ALPHA:
			blendFactor.x = current.w;
			blendFactor.y = current.w;
			blendFactor.z = current.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA:
			blendFactor.x = Short4(0xFFFFu) - current.w;
			blendFactor.y = Short4(0xFFFFu) - current.w;
			blendFactor.z = Short4(0xFFFFu) - current.w;
			break;
		case VK_BLEND_FACTOR_DST_ALPHA:
			blendFactor.x = pixel.w;
			blendFactor.y = pixel.w;
			blendFactor.z = pixel.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_DST_ALPHA:
			blendFactor.x = Short4(0xFFFFu) - pixel.w;
			blendFactor.y = Short4(0xFFFFu) - pixel.w;
			blendFactor.z = Short4(0xFFFFu) - pixel.w;
			break;
		case VK_BLEND_FACTOR_SRC_ALPHA_SATURATE:
			blendFactor.x = Short4(0xFFFFu) - pixel.w;
			blendFactor.x = Min(As<UShort4>(blendFactor.x), As<UShort4>(current.w));
			blendFactor.y = blendFactor.x;
			blendFactor.z = blendFactor.x;
			break;
		case VK_BLEND_FACTOR_CONSTANT_COLOR:
			blendFactor.x = *Pointer<Short4>(data + OFFSET(DrawData, factor.blendConstant4W[0]));
			blendFactor.y = *Pointer<Short4>(data + OFFSET(DrawData, factor.blendConstant4W[1]));
			blendFactor.z = *Pointer<Short4>(data + OFFSET(DrawData, factor.blendConstant4W[2]));
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR:
			blendFactor.x = *Pointer<Short4>(data + OFFSET(DrawData, factor.invBlendConstant4W[0]));
			blendFactor.y = *Pointer<Short4>(data + OFFSET(DrawData, factor.invBlendConstant4W[1]));
			blendFactor.z = *Pointer<Short4>(data + OFFSET(DrawData, factor.invBlendConstant4W[2]));
			break;
		case VK_BLEND_FACTOR_CONSTANT_ALPHA:
			blendFactor.x = *Pointer<Short4>(data + OFFSET(DrawData, factor.blendConstant4W[3]));
			blendFactor.y = *Pointer<Short4>(data + OFFSET(DrawData, factor.blendConstant4W[3]));
			blendFactor.z = *Pointer<Short4>(data + OFFSET(DrawData, factor.blendConstant4W[3]));
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA:
			blendFactor.x = *Pointer<Short4>(data + OFFSET(DrawData, factor.invBlendConstant4W[3]));
			blendFactor.y = *Pointer<Short4>(data + OFFSET(DrawData, factor.invBlendConstant4W[3]));
			blendFactor.z = *Pointer<Short4>(data + OFFSET(DrawData, factor.invBlendConstant4W[3]));
			break;
		default:
			UNSUPPORTED("VkBlendFactor: %d", int(blendFactorActive));
	}
}

void PixelRoutine::blendFactorAlpha(Vector4s &blendFactor, const Vector4s &current, const Vector4s &pixel, VkBlendFactor blendFactorAlphaActive)
{
	switch(blendFactorAlphaActive)
	{
		case VK_BLEND_FACTOR_ZERO:
			// Optimized
			break;
		case VK_BLEND_FACTOR_ONE:
			// Optimized
			break;
		case VK_BLEND_FACTOR_SRC_COLOR:
			blendFactor.w = current.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_SRC_COLOR:
			blendFactor.w = Short4(0xFFFFu) - current.w;
			break;
		case VK_BLEND_FACTOR_DST_COLOR:
			blendFactor.w = pixel.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_DST_COLOR:
			blendFactor.w = Short4(0xFFFFu) - pixel.w;
			break;
		case VK_BLEND_FACTOR_SRC_ALPHA:
			blendFactor.w = current.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA:
			blendFactor.w = Short4(0xFFFFu) - current.w;
			break;
		case VK_BLEND_FACTOR_DST_ALPHA:
			blendFactor.w = pixel.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_DST_ALPHA:
			blendFactor.w = Short4(0xFFFFu) - pixel.w;
			break;
		case VK_BLEND_FACTOR_SRC_ALPHA_SATURATE:
			blendFactor.w = Short4(0xFFFFu);
			break;
		case VK_BLEND_FACTOR_CONSTANT_COLOR:
		case VK_BLEND_FACTOR_CONSTANT_ALPHA:
			blendFactor.w = *Pointer<Short4>(data + OFFSET(DrawData, factor.blendConstant4W[3]));
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR:
		case VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA:
			blendFactor.w = *Pointer<Short4>(data + OFFSET(DrawData, factor.invBlendConstant4W[3]));
			break;
		default:
			UNSUPPORTED("VkBlendFactor: %d", int(blendFactorAlphaActive));
	}
}

bool PixelRoutine::isSRGB(int index) const
{
	return vk::Format(state.targetFormat[index]).isSRGBformat();
}

void PixelRoutine::readPixel(int index, const Pointer<Byte> &cBuffer, const Int &x, Vector4s &pixel)
{
	Short4 c01;
	Short4 c23;
	Pointer<Byte> buffer = cBuffer;
	Pointer<Byte> buffer2;

	Int pitchB = *Pointer<Int>(data + OFFSET(DrawData, colorPitchB[index]));

	switch(state.targetFormat[index])
	{
		case VK_FORMAT_A1R5G5B5_UNORM_PACK16:
			buffer += 2 * x;
			buffer2 = buffer + pitchB;
			c01 = As<Short4>(Int2(*Pointer<Int>(buffer), *Pointer<Int>(buffer2)));

			pixel.x = (c01 & Short4(0x7C00u)) << 1;
			pixel.y = (c01 & Short4(0x03E0u)) << 6;
			pixel.z = (c01 & Short4(0x001Fu)) << 11;
			pixel.w = (c01 & Short4(0x8000u)) >> 15;

			// Expand to 16 bit range
			pixel.x |= As<Short4>(As<UShort4>(pixel.x) >> 5);
			pixel.x |= As<Short4>(As<UShort4>(pixel.x) >> 10);
			pixel.y |= As<Short4>(As<UShort4>(pixel.y) >> 5);
			pixel.y |= As<Short4>(As<UShort4>(pixel.y) >> 10);
			pixel.z |= As<Short4>(As<UShort4>(pixel.z) >> 5);
			pixel.z |= As<Short4>(As<UShort4>(pixel.z) >> 10);
			break;
		case VK_FORMAT_R5G6B5_UNORM_PACK16:
			buffer += 2 * x;
			buffer2 = buffer + pitchB;
			c01 = As<Short4>(Int2(*Pointer<Int>(buffer), *Pointer<Int>(buffer2)));

			pixel.x = c01 & Short4(0xF800u);
			pixel.y = (c01 & Short4(0x07E0u)) << 5;
			pixel.z = (c01 & Short4(0x001Fu)) << 11;
			pixel.w = Short4(0xFFFFu);

			// Expand to 16 bit range
			pixel.x |= As<Short4>(As<UShort4>(pixel.x) >> 5);
			pixel.x |= As<Short4>(As<UShort4>(pixel.x) >> 10);
			pixel.y |= As<Short4>(As<UShort4>(pixel.y) >> 6);
			pixel.y |= As<Short4>(As<UShort4>(pixel.y) >> 12);
			pixel.z |= As<Short4>(As<UShort4>(pixel.z) >> 5);
			pixel.z |= As<Short4>(As<UShort4>(pixel.z) >> 10);
			break;
		case VK_FORMAT_B8G8R8A8_UNORM:
		case VK_FORMAT_B8G8R8A8_SRGB:
			buffer += 4 * x;
			c01 = *Pointer<Short4>(buffer);
			buffer += pitchB;
			c23 = *Pointer<Short4>(buffer);
			pixel.z = c01;
			pixel.y = c01;
			pixel.z = UnpackLow(As<Byte8>(pixel.z), As<Byte8>(c23));
			pixel.y = UnpackHigh(As<Byte8>(pixel.y), As<Byte8>(c23));
			pixel.x = pixel.z;
			pixel.z = UnpackLow(As<Byte8>(pixel.z), As<Byte8>(pixel.y));
			pixel.x = UnpackHigh(As<Byte8>(pixel.x), As<Byte8>(pixel.y));
			pixel.y = pixel.z;
			pixel.w = pixel.x;
			pixel.x = UnpackLow(As<Byte8>(pixel.x), As<Byte8>(pixel.x));
			pixel.y = UnpackHigh(As<Byte8>(pixel.y), As<Byte8>(pixel.y));
			pixel.z = UnpackLow(As<Byte8>(pixel.z), As<Byte8>(pixel.z));
			pixel.w = UnpackHigh(As<Byte8>(pixel.w), As<Byte8>(pixel.w));
			break;
		case VK_FORMAT_R8G8B8A8_UNORM:
		case VK_FORMAT_R8G8B8A8_SRGB:
			buffer += 4 * x;
			c01 = *Pointer<Short4>(buffer);
			buffer += pitchB;
			c23 = *Pointer<Short4>(buffer);
			pixel.z = c01;
			pixel.y = c01;
			pixel.z = UnpackLow(As<Byte8>(pixel.z), As<Byte8>(c23));
			pixel.y = UnpackHigh(As<Byte8>(pixel.y), As<Byte8>(c23));
			pixel.x = pixel.z;
			pixel.z = UnpackLow(As<Byte8>(pixel.z), As<Byte8>(pixel.y));
			pixel.x = UnpackHigh(As<Byte8>(pixel.x), As<Byte8>(pixel.y));
			pixel.y = pixel.z;
			pixel.w = pixel.x;
			pixel.x = UnpackLow(As<Byte8>(pixel.z), As<Byte8>(pixel.z));
			pixel.y = UnpackHigh(As<Byte8>(pixel.y), As<Byte8>(pixel.y));
			pixel.z = UnpackLow(As<Byte8>(pixel.w), As<Byte8>(pixel.w));
			pixel.w = UnpackHigh(As<Byte8>(pixel.w), As<Byte8>(pixel.w));
			break;
		case VK_FORMAT_R8_UNORM:
			buffer += 1 * x;
			pixel.x = Insert(pixel.x, *Pointer<Short>(buffer), 0);
			buffer += pitchB;
			pixel.x = Insert(pixel.x, *Pointer<Short>(buffer), 1);
			pixel.x = UnpackLow(As<Byte8>(pixel.x), As<Byte8>(pixel.x));
			pixel.y = Short4(0x0000);
			pixel.z = Short4(0x0000);
			pixel.w = Short4(0xFFFFu);
			break;
		case VK_FORMAT_R8G8_UNORM:
			buffer += 2 * x;
			c01 = As<Short4>(Insert(As<Int2>(c01), *Pointer<Int>(buffer), 0));
			buffer += pitchB;
			c01 = As<Short4>(Insert(As<Int2>(c01), *Pointer<Int>(buffer), 1));
			pixel.x = (c01 & Short4(0x00FFu)) | (c01 << 8);
			pixel.y = (c01 & Short4(0xFF00u)) | As<Short4>(As<UShort4>(c01) >> 8);
			pixel.z = Short4(0x0000u);
			pixel.w = Short4(0xFFFFu);
			break;
		case VK_FORMAT_R16G16B16A16_UNORM:
			buffer += 8 * x;
			pixel.x = *Pointer<Short4>(buffer + 0);
			pixel.y = *Pointer<Short4>(buffer + 8);
			buffer += pitchB;
			pixel.z = *Pointer<Short4>(buffer + 0);
			pixel.w = *Pointer<Short4>(buffer + 8);
			transpose4x4(pixel.x, pixel.y, pixel.z, pixel.w);
			break;
		case VK_FORMAT_R16G16_UNORM:
			buffer += 4 * x;
			pixel.x = *Pointer<Short4>(buffer);
			buffer += pitchB;
			pixel.y = *Pointer<Short4>(buffer);
			pixel.z = pixel.x;
			pixel.x = As<Short4>(UnpackLow(pixel.x, pixel.y));
			pixel.z = As<Short4>(UnpackHigh(pixel.z, pixel.y));
			pixel.y = pixel.z;
			pixel.x = As<Short4>(UnpackLow(pixel.x, pixel.z));
			pixel.y = As<Short4>(UnpackHigh(pixel.y, pixel.z));
			pixel.z = Short4(0xFFFFu);
			pixel.w = Short4(0xFFFFu);
			break;
		case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
		{
			Int4 v = Int4(0);
			buffer += 4 * x;
			v = Insert(v, *Pointer<Int>(buffer + 0), 0);
			v = Insert(v, *Pointer<Int>(buffer + 4), 1);
			buffer += pitchB;
			v = Insert(v, *Pointer<Int>(buffer + 0), 2);
			v = Insert(v, *Pointer<Int>(buffer + 4), 3);

			pixel = a2b10g10r10Unpack(v);
		}
		break;
		case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
		{
			Int4 v = Int4(0);
			v = Insert(v, *Pointer<Int>(buffer + 4 * x), 0);
			v = Insert(v, *Pointer<Int>(buffer + 4 * x + 4), 1);
			buffer += *Pointer<Int>(data + OFFSET(DrawData, colorPitchB[index]));
			v = Insert(v, *Pointer<Int>(buffer + 4 * x), 2);
			v = Insert(v, *Pointer<Int>(buffer + 4 * x + 4), 3);

			pixel = a2r10g10b10Unpack(v);
		}
		break;
		default:
			UNSUPPORTED("VkFormat %d", int(state.targetFormat[index]));
	}

	if(isSRGB(index))
	{
		sRGBtoLinear16_12_16(pixel);
	}
}

void PixelRoutine::alphaBlend(int index, const Pointer<Byte> &cBuffer, Vector4s &current, const Int &x)
{
	if(!state.blendState[index].alphaBlendEnable)
	{
		return;
	}

	ASSERT(state.targetFormat[index].supportsColorAttachmentBlend());

	Vector4s pixel;
	readPixel(index, cBuffer, x, pixel);

	// Final Color = ObjectColor * SourceBlendFactor + PixelColor * DestinationBlendFactor
	Vector4s sourceFactor;
	Vector4s destFactor;

	blendFactor(sourceFactor, current, pixel, state.blendState[index].sourceBlendFactor);
	blendFactor(destFactor, current, pixel, state.blendState[index].destBlendFactor);

	if(state.blendState[index].sourceBlendFactor != VK_BLEND_FACTOR_ONE && state.blendState[index].sourceBlendFactor != VK_BLEND_FACTOR_ZERO)
	{
		current.x = MulHigh(As<UShort4>(current.x), As<UShort4>(sourceFactor.x));
		current.y = MulHigh(As<UShort4>(current.y), As<UShort4>(sourceFactor.y));
		current.z = MulHigh(As<UShort4>(current.z), As<UShort4>(sourceFactor.z));
	}

	if(state.blendState[index].destBlendFactor != VK_BLEND_FACTOR_ONE && state.blendState[index].destBlendFactor != VK_BLEND_FACTOR_ZERO)
	{
		pixel.x = MulHigh(As<UShort4>(pixel.x), As<UShort4>(destFactor.x));
		pixel.y = MulHigh(As<UShort4>(pixel.y), As<UShort4>(destFactor.y));
		pixel.z = MulHigh(As<UShort4>(pixel.z), As<UShort4>(destFactor.z));
	}

	switch(state.blendState[index].blendOperation)
	{
		case VK_BLEND_OP_ADD:
			current.x = AddSat(As<UShort4>(current.x), As<UShort4>(pixel.x));
			current.y = AddSat(As<UShort4>(current.y), As<UShort4>(pixel.y));
			current.z = AddSat(As<UShort4>(current.z), As<UShort4>(pixel.z));
			break;
		case VK_BLEND_OP_SUBTRACT:
			current.x = SubSat(As<UShort4>(current.x), As<UShort4>(pixel.x));
			current.y = SubSat(As<UShort4>(current.y), As<UShort4>(pixel.y));
			current.z = SubSat(As<UShort4>(current.z), As<UShort4>(pixel.z));
			break;
		case VK_BLEND_OP_REVERSE_SUBTRACT:
			current.x = SubSat(As<UShort4>(pixel.x), As<UShort4>(current.x));
			current.y = SubSat(As<UShort4>(pixel.y), As<UShort4>(current.y));
			current.z = SubSat(As<UShort4>(pixel.z), As<UShort4>(current.z));
			break;
		case VK_BLEND_OP_MIN:
			current.x = Min(As<UShort4>(current.x), As<UShort4>(pixel.x));
			current.y = Min(As<UShort4>(current.y), As<UShort4>(pixel.y));
			current.z = Min(As<UShort4>(current.z), As<UShort4>(pixel.z));
			break;
		case VK_BLEND_OP_MAX:
			current.x = Max(As<UShort4>(current.x), As<UShort4>(pixel.x));
			current.y = Max(As<UShort4>(current.y), As<UShort4>(pixel.y));
			current.z = Max(As<UShort4>(current.z), As<UShort4>(pixel.z));
			break;
		case VK_BLEND_OP_SRC_EXT:
			// No operation
			break;
		case VK_BLEND_OP_DST_EXT:
			current.x = pixel.x;
			current.y = pixel.y;
			current.z = pixel.z;
			break;
		case VK_BLEND_OP_ZERO_EXT:
			current.x = Short4(0x0000);
			current.y = Short4(0x0000);
			current.z = Short4(0x0000);
			break;
		default:
			UNSUPPORTED("VkBlendOp: %d", int(state.blendState[index].blendOperation));
	}

	blendFactorAlpha(sourceFactor, current, pixel, state.blendState[index].sourceBlendFactorAlpha);
	blendFactorAlpha(destFactor, current, pixel, state.blendState[index].destBlendFactorAlpha);

	if(state.blendState[index].sourceBlendFactorAlpha != VK_BLEND_FACTOR_ONE && state.blendState[index].sourceBlendFactorAlpha != VK_BLEND_FACTOR_ZERO)
	{
		current.w = MulHigh(As<UShort4>(current.w), As<UShort4>(sourceFactor.w));
	}

	if(state.blendState[index].destBlendFactorAlpha != VK_BLEND_FACTOR_ONE && state.blendState[index].destBlendFactorAlpha != VK_BLEND_FACTOR_ZERO)
	{
		pixel.w = MulHigh(As<UShort4>(pixel.w), As<UShort4>(destFactor.w));
	}

	switch(state.blendState[index].blendOperationAlpha)
	{
		case VK_BLEND_OP_ADD:
			current.w = AddSat(As<UShort4>(current.w), As<UShort4>(pixel.w));
			break;
		case VK_BLEND_OP_SUBTRACT:
			current.w = SubSat(As<UShort4>(current.w), As<UShort4>(pixel.w));
			break;
		case VK_BLEND_OP_REVERSE_SUBTRACT:
			current.w = SubSat(As<UShort4>(pixel.w), As<UShort4>(current.w));
			break;
		case VK_BLEND_OP_MIN:
			current.w = Min(As<UShort4>(current.w), As<UShort4>(pixel.w));
			break;
		case VK_BLEND_OP_MAX:
			current.w = Max(As<UShort4>(current.w), As<UShort4>(pixel.w));
			break;
		case VK_BLEND_OP_SRC_EXT:
			// No operation
			break;
		case VK_BLEND_OP_DST_EXT:
			current.w = pixel.w;
			break;
		case VK_BLEND_OP_ZERO_EXT:
			current.w = Short4(0x0000);
			break;
		default:
			UNSUPPORTED("VkBlendOp: %d", int(state.blendState[index].blendOperationAlpha));
	}
}

void PixelRoutine::writeColor(int index, const Pointer<Byte> &cBuffer, const Int &x, Vector4s &current, const Int &sMask, const Int &zMask, const Int &cMask)
{
	if(isSRGB(index))
	{
		linearToSRGB16_12_16(current);
	}

	switch(state.targetFormat[index])
	{
		case VK_FORMAT_B8G8R8A8_UNORM:
		case VK_FORMAT_B8G8R8A8_SRGB:
		case VK_FORMAT_R8G8B8A8_UNORM:
		case VK_FORMAT_R8G8B8A8_SRGB:
		case VK_FORMAT_R8G8_UNORM:
		case VK_FORMAT_R8_UNORM:
		case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
		case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
			current.x = current.x - As<Short4>(As<UShort4>(current.x) >> 8) + Short4(0x0080);
			current.y = current.y - As<Short4>(As<UShort4>(current.y) >> 8) + Short4(0x0080);
			current.z = current.z - As<Short4>(As<UShort4>(current.z) >> 8) + Short4(0x0080);
			current.w = current.w - As<Short4>(As<UShort4>(current.w) >> 8) + Short4(0x0080);
			break;
		case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
		case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
			current.x = current.x - As<Short4>(As<UShort4>(current.x) >> 10) + Short4(0x0020);
			current.y = current.y - As<Short4>(As<UShort4>(current.y) >> 10) + Short4(0x0020);
			current.z = current.z - As<Short4>(As<UShort4>(current.z) >> 10) + Short4(0x0020);
			current.w = current.w - As<Short4>(As<UShort4>(current.w) >> 2) + Short4(0x2000);
			break;
		case VK_FORMAT_A1R5G5B5_UNORM_PACK16:
			current.x = current.x - As<Short4>(As<UShort4>(current.x) >> 5) + Short4(0x0400);
			current.y = current.y - As<Short4>(As<UShort4>(current.y) >> 5) + Short4(0x0400);
			current.z = current.z - As<Short4>(As<UShort4>(current.z) >> 5) + Short4(0x0400);
			current.w = current.w - As<Short4>(As<UShort4>(current.w) >> 1) + Short4(0x4000);
			break;
		case VK_FORMAT_R5G6B5_UNORM_PACK16:
			current.x = current.x - As<Short4>(As<UShort4>(current.x) >> 5) + Short4(0x0400);
			current.y = current.y - As<Short4>(As<UShort4>(current.y) >> 6) + Short4(0x0200);
			current.z = current.z - As<Short4>(As<UShort4>(current.z) >> 5) + Short4(0x0400);
			break;
		default:
			break;
	}

	int rgbaWriteMask = state.colorWriteActive(index) & outputMasks[index];
	int bgraWriteMask = (rgbaWriteMask & 0x0000000A) | (rgbaWriteMask & 0x00000001) << 2 | (rgbaWriteMask & 0x00000004) >> 2;

	switch(state.targetFormat[index])
	{
		case VK_FORMAT_A1R5G5B5_UNORM_PACK16:
		{
			current.w = current.w & Short4(0x8000u);
			current.x = As<UShort4>(current.x & Short4(0xF800)) >> 1;
			current.y = As<UShort4>(current.y & Short4(0xF800)) >> 6;
			current.z = As<UShort4>(current.z & Short4(0xF800)) >> 11;

			current.x = current.x | current.y | current.z | current.w;
		}
		break;
		case VK_FORMAT_R5G6B5_UNORM_PACK16:
		{
			current.x = current.x & Short4(0xF800u);
			current.y = As<UShort4>(current.y & Short4(0xFC00u)) >> 5;
			current.z = As<UShort4>(current.z) >> 11;

			current.x = current.x | current.y | current.z;
		}
		break;
		case VK_FORMAT_B8G8R8A8_UNORM:
		case VK_FORMAT_B8G8R8A8_SRGB:
			if(rgbaWriteMask == 0x7)
			{
				current.x = As<Short4>(As<UShort4>(current.x) >> 8);
				current.y = As<Short4>(As<UShort4>(current.y) >> 8);
				current.z = As<Short4>(As<UShort4>(current.z) >> 8);

				current.z = As<Short4>(PackUnsigned(current.z, current.x));
				current.y = As<Short4>(PackUnsigned(current.y, current.y));

				current.x = current.z;
				current.z = UnpackLow(As<Byte8>(current.z), As<Byte8>(current.y));
				current.x = UnpackHigh(As<Byte8>(current.x), As<Byte8>(current.y));
				current.y = current.z;
				current.z = As<Short4>(UnpackLow(current.z, current.x));
				current.y = As<Short4>(UnpackHigh(current.y, current.x));
			}
			else
			{
				current.x = As<Short4>(As<UShort4>(current.x) >> 8);
				current.y = As<Short4>(As<UShort4>(current.y) >> 8);
				current.z = As<Short4>(As<UShort4>(current.z) >> 8);
				current.w = As<Short4>(As<UShort4>(current.w) >> 8);

				current.z = As<Short4>(PackUnsigned(current.z, current.x));
				current.y = As<Short4>(PackUnsigned(current.y, current.w));

				current.x = current.z;
				current.z = UnpackLow(As<Byte8>(current.z), As<Byte8>(current.y));
				current.x = UnpackHigh(As<Byte8>(current.x), As<Byte8>(current.y));
				current.y = current.z;
				current.z = As<Short4>(UnpackLow(current.z, current.x));
				current.y = As<Short4>(UnpackHigh(current.y, current.x));
			}
			break;
		case VK_FORMAT_R8G8B8A8_UNORM:
		case VK_FORMAT_R8G8B8A8_SRGB:
		case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
		case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
			if(rgbaWriteMask == 0x7)
			{
				current.x = As<Short4>(As<UShort4>(current.x) >> 8);
				current.y = As<Short4>(As<UShort4>(current.y) >> 8);
				current.z = As<Short4>(As<UShort4>(current.z) >> 8);

				current.z = As<Short4>(PackUnsigned(current.x, current.z));
				current.y = As<Short4>(PackUnsigned(current.y, current.y));

				current.x = current.z;
				current.z = UnpackLow(As<Byte8>(current.z), As<Byte8>(current.y));
				current.x = UnpackHigh(As<Byte8>(current.x), As<Byte8>(current.y));
				current.y = current.z;
				current.z = As<Short4>(UnpackLow(current.z, current.x));
				current.y = As<Short4>(UnpackHigh(current.y, current.x));
			}
			else
			{
				current.x = As<Short4>(As<UShort4>(current.x) >> 8);
				current.y = As<Short4>(As<UShort4>(current.y) >> 8);
				current.z = As<Short4>(As<UShort4>(current.z) >> 8);
				current.w = As<Short4>(As<UShort4>(current.w) >> 8);

				current.z = As<Short4>(PackUnsigned(current.x, current.z));
				current.y = As<Short4>(PackUnsigned(current.y, current.w));

				current.x = current.z;
				current.z = UnpackLow(As<Byte8>(current.z), As<Byte8>(current.y));
				current.x = UnpackHigh(As<Byte8>(current.x), As<Byte8>(current.y));
				current.y = current.z;
				current.z = As<Short4>(UnpackLow(current.z, current.x));
				current.y = As<Short4>(UnpackHigh(current.y, current.x));
			}
			break;
		case VK_FORMAT_R8G8_UNORM:
			current.x = As<Short4>(As<UShort4>(current.x) >> 8);
			current.y = As<Short4>(As<UShort4>(current.y) >> 8);
			current.x = As<Short4>(PackUnsigned(current.x, current.x));
			current.y = As<Short4>(PackUnsigned(current.y, current.y));
			current.x = UnpackLow(As<Byte8>(current.x), As<Byte8>(current.y));
			break;
		case VK_FORMAT_R8_UNORM:
			current.x = As<Short4>(As<UShort4>(current.x) >> 8);
			current.x = As<Short4>(PackUnsigned(current.x, current.x));
			break;
		case VK_FORMAT_R16G16_UNORM:
			current.z = current.x;
			current.x = As<Short4>(UnpackLow(current.x, current.y));
			current.z = As<Short4>(UnpackHigh(current.z, current.y));
			current.y = current.z;
			break;
		case VK_FORMAT_R16G16B16A16_UNORM:
			transpose4x4(current.x, current.y, current.z, current.w);
			break;
		case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
		{
			auto r = (Int4(current.x) >> 6) & Int4(0x3ff);
			auto g = (Int4(current.y) >> 6) & Int4(0x3ff);
			auto b = (Int4(current.z) >> 6) & Int4(0x3ff);
			auto a = (Int4(current.w) >> 14) & Int4(0x3);
			Int4 packed = (a << 30) | (b << 20) | (g << 10) | r;
			auto c02 = As<Int2>(Int4(packed.xzzz));  // TODO: auto c02 = packed.xz;
			auto c13 = As<Int2>(Int4(packed.ywww));  // TODO: auto c13 = packed.yw;
			current.x = UnpackLow(c02, c13);
			current.y = UnpackHigh(c02, c13);
			break;
		}
		case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
		{
			auto r = (Int4(current.x) >> 6) & Int4(0x3ff);
			auto g = (Int4(current.y) >> 6) & Int4(0x3ff);
			auto b = (Int4(current.z) >> 6) & Int4(0x3ff);
			auto a = (Int4(current.w) >> 14) & Int4(0x3);
			Int4 packed = (a << 30) | (r << 20) | (g << 10) | b;
			auto c02 = As<Int2>(Int4(packed.xzzz));  // TODO: auto c02 = packed.xz;
			auto c13 = As<Int2>(Int4(packed.ywww));  // TODO: auto c13 = packed.yw;
			current.x = UnpackLow(c02, c13);
			current.y = UnpackHigh(c02, c13);
			break;
		}
		default:
			UNSUPPORTED("VkFormat: %d", int(state.targetFormat[index]));
	}

	Short4 c01 = current.z;
	Short4 c23 = current.y;

	Int xMask;  // Combination of all masks

	if(state.depthTestActive)
	{
		xMask = zMask;
	}
	else
	{
		xMask = cMask;
	}

	if(state.stencilActive)
	{
		xMask &= sMask;
	}

	Pointer<Byte> buffer = cBuffer;
	Int pitchB = *Pointer<Int>(data + OFFSET(DrawData, colorPitchB[index]));

	switch(state.targetFormat[index])
	{
		case VK_FORMAT_A1R5G5B5_UNORM_PACK16:
		{
			buffer += 2 * x;
			Int value = *Pointer<Int>(buffer);

			Int channelMask = *Pointer<Int>(constants + OFFSET(Constants, mask5551Q[bgraWriteMask & 0xF][0]));

			Int c01 = Extract(As<Int2>(current.x), 0);
			Int mask01 = *Pointer<Int>(constants + OFFSET(Constants, maskW4Q[0][0]) + xMask * 8);
			if(bgraWriteMask != 0x0000000F)
			{
				mask01 &= channelMask;
			}
			*Pointer<Int>(buffer) = (c01 & mask01) | (value & ~mask01);

			buffer += pitchB;
			value = *Pointer<Int>(buffer);

			Int c23 = Extract(As<Int2>(current.x), 1);
			Int mask23 = *Pointer<Int>(constants + OFFSET(Constants, maskW4Q[0][2]) + xMask * 8);
			if(bgraWriteMask != 0x0000000F)
			{
				mask23 &= channelMask;
			}
			*Pointer<Int>(buffer) = (c23 & mask23) | (value & ~mask23);
		}
		break;
		case VK_FORMAT_R5G6B5_UNORM_PACK16:
		{
			buffer += 2 * x;
			Int value = *Pointer<Int>(buffer);

			Int channelMask = *Pointer<Int>(constants + OFFSET(Constants, mask565Q[bgraWriteMask & 0x7][0]));

			Int c01 = Extract(As<Int2>(current.x), 0);
			Int mask01 = *Pointer<Int>(constants + OFFSET(Constants, maskW4Q[0][0]) + xMask * 8);
			if((bgraWriteMask & 0x00000007) != 0x00000007)
			{
				mask01 &= channelMask;
			}
			*Pointer<Int>(buffer) = (c01 & mask01) | (value & ~mask01);

			buffer += pitchB;
			value = *Pointer<Int>(buffer);

			Int c23 = Extract(As<Int2>(current.x), 1);
			Int mask23 = *Pointer<Int>(constants + OFFSET(Constants, maskW4Q[0][2]) + xMask * 8);
			if((bgraWriteMask & 0x00000007) != 0x00000007)
			{
				mask23 &= channelMask;
			}
			*Pointer<Int>(buffer) = (c23 & mask23) | (value & ~mask23);
		}
		break;
		case VK_FORMAT_B8G8R8A8_UNORM:
		case VK_FORMAT_B8G8R8A8_SRGB:
		{
			buffer += x * 4;
			Short4 value = *Pointer<Short4>(buffer);
			Short4 channelMask = *Pointer<Short4>(constants + OFFSET(Constants, maskB4Q[bgraWriteMask][0]));

			Short4 mask01 = *Pointer<Short4>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
			if(bgraWriteMask != 0x0000000F)
			{
				mask01 &= channelMask;
			}
			*Pointer<Short4>(buffer) = (c01 & mask01) | (value & ~mask01);

			buffer += pitchB;
			value = *Pointer<Short4>(buffer);

			Short4 mask23 = *Pointer<Short4>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
			if(bgraWriteMask != 0x0000000F)
			{
				mask23 &= channelMask;
			}
			*Pointer<Short4>(buffer) = (c23 & mask23) | (value & ~mask23);
		}
		break;
		case VK_FORMAT_R8G8B8A8_UNORM:
		case VK_FORMAT_R8G8B8A8_SRGB:
		case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
		case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
		{
			buffer += x * 4;
			Short4 value = *Pointer<Short4>(buffer);
			Short4 channelMask = *Pointer<Short4>(constants + OFFSET(Constants, maskB4Q[rgbaWriteMask][0]));

			Short4 mask01 = *Pointer<Short4>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
			if(rgbaWriteMask != 0x0000000F)
			{
				mask01 &= channelMask;
			}
			*Pointer<Short4>(buffer) = (c01 & mask01) | (value & ~mask01);

			buffer += pitchB;
			value = *Pointer<Short4>(buffer);

			Short4 mask23 = *Pointer<Short4>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
			if(rgbaWriteMask != 0x0000000F)
			{
				mask23 &= channelMask;
			}
			*Pointer<Short4>(buffer) = (c23 & mask23) | (value & ~mask23);
		}
		break;
		case VK_FORMAT_R8G8_UNORM:
			if((rgbaWriteMask & 0x00000003) != 0x0)
			{
				buffer += 2 * x;
				Int2 value;
				value = Insert(value, *Pointer<Int>(buffer), 0);
				value = Insert(value, *Pointer<Int>(buffer + pitchB), 1);

				Int2 packedCol = As<Int2>(current.x);

				UInt2 mergedMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskW4Q) + xMask * 8);
				if((rgbaWriteMask & 0x3) != 0x3)
				{
					Int tmpMask = *Pointer<Int>(constants + OFFSET(Constants, maskB4Q[5 * (rgbaWriteMask & 0x3)][0]));
					UInt2 rgbaMask = As<UInt2>(Int2(tmpMask, tmpMask));
					mergedMask &= rgbaMask;
				}

				packedCol = As<Int2>((As<UInt2>(packedCol) & mergedMask) | (As<UInt2>(value) & ~mergedMask));

				*Pointer<UInt>(buffer) = As<UInt>(Extract(packedCol, 0));
				*Pointer<UInt>(buffer + pitchB) = As<UInt>(Extract(packedCol, 1));
			}
			break;
		case VK_FORMAT_R8_UNORM:
			if(rgbaWriteMask & 0x00000001)
			{
				buffer += 1 * x;
				Short4 value;
				value = Insert(value, *Pointer<Short>(buffer), 0);
				value = Insert(value, *Pointer<Short>(buffer + pitchB), 1);

				current.x &= *Pointer<Short4>(constants + OFFSET(Constants, maskB4Q) + 8 * xMask);
				value &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskB4Q) + 8 * xMask);
				current.x |= value;

				*Pointer<Short>(buffer) = Extract(current.x, 0);
				*Pointer<Short>(buffer + pitchB) = Extract(current.x, 1);
			}
			break;
		case VK_FORMAT_R16G16_UNORM:
		{
			buffer += 4 * x;

			Short4 value = *Pointer<Short4>(buffer);

			if((rgbaWriteMask & 0x00000003) != 0x00000003)
			{
				Short4 masked = value;
				current.x &= *Pointer<Short4>(constants + OFFSET(Constants, maskW01Q[rgbaWriteMask & 0x3][0]));
				masked &= *Pointer<Short4>(constants + OFFSET(Constants, maskW01Q[~rgbaWriteMask & 0x3][0]));
				current.x |= masked;
			}

			current.x &= *Pointer<Short4>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
			value &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskD01Q) + xMask * 8);
			current.x |= value;
			*Pointer<Short4>(buffer) = current.x;

			buffer += pitchB;

			value = *Pointer<Short4>(buffer);

			if((rgbaWriteMask & 0x00000003) != 0x00000003)
			{
				Short4 masked = value;
				current.y &= *Pointer<Short4>(constants + OFFSET(Constants, maskW01Q[rgbaWriteMask & 0x3][0]));
				masked &= *Pointer<Short4>(constants + OFFSET(Constants, maskW01Q[~rgbaWriteMask & 0x3][0]));
				current.y |= masked;
			}

			current.y &= *Pointer<Short4>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
			value &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskD23Q) + xMask * 8);
			current.y |= value;
			*Pointer<Short4>(buffer) = current.y;
		}
		break;
		case VK_FORMAT_R16G16B16A16_UNORM:
		{
			buffer += 8 * x;

			{
				Short4 value = *Pointer<Short4>(buffer);

				if(rgbaWriteMask != 0x0000000F)
				{
					Short4 masked = value;
					current.x &= *Pointer<Short4>(constants + OFFSET(Constants, maskW4Q[rgbaWriteMask][0]));
					masked &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskW4Q[rgbaWriteMask][0]));
					current.x |= masked;
				}

				current.x &= *Pointer<Short4>(constants + OFFSET(Constants, maskQ0Q) + xMask * 8);
				value &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskQ0Q) + xMask * 8);
				current.x |= value;
				*Pointer<Short4>(buffer) = current.x;
			}

			{
				Short4 value = *Pointer<Short4>(buffer + 8);

				if(rgbaWriteMask != 0x0000000F)
				{
					Short4 masked = value;
					current.y &= *Pointer<Short4>(constants + OFFSET(Constants, maskW4Q[rgbaWriteMask][0]));
					masked &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskW4Q[rgbaWriteMask][0]));
					current.y |= masked;
				}

				current.y &= *Pointer<Short4>(constants + OFFSET(Constants, maskQ1Q) + xMask * 8);
				value &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskQ1Q) + xMask * 8);
				current.y |= value;
				*Pointer<Short4>(buffer + 8) = current.y;
			}

			buffer += pitchB;

			{
				Short4 value = *Pointer<Short4>(buffer);

				if(rgbaWriteMask != 0x0000000F)
				{
					Short4 masked = value;
					current.z &= *Pointer<Short4>(constants + OFFSET(Constants, maskW4Q[rgbaWriteMask][0]));
					masked &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskW4Q[rgbaWriteMask][0]));
					current.z |= masked;
				}

				current.z &= *Pointer<Short4>(constants + OFFSET(Constants, maskQ2Q) + xMask * 8);
				value &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskQ2Q) + xMask * 8);
				current.z |= value;
				*Pointer<Short4>(buffer) = current.z;
			}

			{
				Short4 value = *Pointer<Short4>(buffer + 8);

				if(rgbaWriteMask != 0x0000000F)
				{
					Short4 masked = value;
					current.w &= *Pointer<Short4>(constants + OFFSET(Constants, maskW4Q[rgbaWriteMask][0]));
					masked &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskW4Q[rgbaWriteMask][0]));
					current.w |= masked;
				}

				current.w &= *Pointer<Short4>(constants + OFFSET(Constants, maskQ3Q) + xMask * 8);
				value &= *Pointer<Short4>(constants + OFFSET(Constants, invMaskQ3Q) + xMask * 8);
				current.w |= value;
				*Pointer<Short4>(buffer + 8) = current.w;
			}
		}
		break;
		case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
			rgbaWriteMask = bgraWriteMask;
			// [[fallthrough]]
		case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
		{
			buffer += 4 * x;

			Int2 value = *Pointer<Int2>(buffer, 16);
			Int2 mergedMask = *Pointer<Int2>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
			if(rgbaWriteMask != 0xF)
			{
				mergedMask &= *Pointer<Int2>(constants + OFFSET(Constants, mask10Q[rgbaWriteMask][0]));
			}
			*Pointer<Int2>(buffer) = (As<Int2>(current.x) & mergedMask) | (value & ~mergedMask);

			buffer += pitchB;

			value = *Pointer<Int2>(buffer, 16);
			mergedMask = *Pointer<Int2>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
			if(rgbaWriteMask != 0xF)
			{
				mergedMask &= *Pointer<Int2>(constants + OFFSET(Constants, mask10Q[rgbaWriteMask][0]));
			}
			*Pointer<Int2>(buffer) = (As<Int2>(current.y) & mergedMask) | (value & ~mergedMask);
		}
		break;
		default:
			UNSUPPORTED("VkFormat: %d", int(state.targetFormat[index]));
	}
}

void PixelRoutine::blendFactor(Vector4f &blendFactor, const Vector4f &oC, const Vector4f &pixel, VkBlendFactor blendFactorActive)
{
	switch(blendFactorActive)
	{
		case VK_BLEND_FACTOR_ZERO:
			blendFactor.x = Float4(0);
			blendFactor.y = Float4(0);
			blendFactor.z = Float4(0);
			break;
		case VK_BLEND_FACTOR_ONE:
			blendFactor.x = Float4(1);
			blendFactor.y = Float4(1);
			blendFactor.z = Float4(1);
			break;
		case VK_BLEND_FACTOR_SRC_COLOR:
			blendFactor.x = oC.x;
			blendFactor.y = oC.y;
			blendFactor.z = oC.z;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_SRC_COLOR:
			blendFactor.x = Float4(1.0f) - oC.x;
			blendFactor.y = Float4(1.0f) - oC.y;
			blendFactor.z = Float4(1.0f) - oC.z;
			break;
		case VK_BLEND_FACTOR_DST_COLOR:
			blendFactor.x = pixel.x;
			blendFactor.y = pixel.y;
			blendFactor.z = pixel.z;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_DST_COLOR:
			blendFactor.x = Float4(1.0f) - pixel.x;
			blendFactor.y = Float4(1.0f) - pixel.y;
			blendFactor.z = Float4(1.0f) - pixel.z;
			break;
		case VK_BLEND_FACTOR_SRC_ALPHA:
			blendFactor.x = oC.w;
			blendFactor.y = oC.w;
			blendFactor.z = oC.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA:
			blendFactor.x = Float4(1.0f) - oC.w;
			blendFactor.y = Float4(1.0f) - oC.w;
			blendFactor.z = Float4(1.0f) - oC.w;
			break;
		case VK_BLEND_FACTOR_DST_ALPHA:
			blendFactor.x = pixel.w;
			blendFactor.y = pixel.w;
			blendFactor.z = pixel.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_DST_ALPHA:
			blendFactor.x = Float4(1.0f) - pixel.w;
			blendFactor.y = Float4(1.0f) - pixel.w;
			blendFactor.z = Float4(1.0f) - pixel.w;
			break;
		case VK_BLEND_FACTOR_SRC_ALPHA_SATURATE:
			blendFactor.x = Float4(1.0f) - pixel.w;
			blendFactor.x = Min(blendFactor.x, oC.w);
			blendFactor.y = blendFactor.x;
			blendFactor.z = blendFactor.x;
			break;
		case VK_BLEND_FACTOR_CONSTANT_COLOR:
			blendFactor.x = *Pointer<Float4>(data + OFFSET(DrawData, factor.blendConstant4F[0]));
			blendFactor.y = *Pointer<Float4>(data + OFFSET(DrawData, factor.blendConstant4F[1]));
			blendFactor.z = *Pointer<Float4>(data + OFFSET(DrawData, factor.blendConstant4F[2]));
			break;
		case VK_BLEND_FACTOR_CONSTANT_ALPHA:
			blendFactor.x = *Pointer<Float4>(data + OFFSET(DrawData, factor.blendConstant4F[3]));
			blendFactor.y = *Pointer<Float4>(data + OFFSET(DrawData, factor.blendConstant4F[3]));
			blendFactor.z = *Pointer<Float4>(data + OFFSET(DrawData, factor.blendConstant4F[3]));
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR:
			blendFactor.x = *Pointer<Float4>(data + OFFSET(DrawData, factor.invBlendConstant4F[0]));
			blendFactor.y = *Pointer<Float4>(data + OFFSET(DrawData, factor.invBlendConstant4F[1]));
			blendFactor.z = *Pointer<Float4>(data + OFFSET(DrawData, factor.invBlendConstant4F[2]));
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA:
			blendFactor.x = *Pointer<Float4>(data + OFFSET(DrawData, factor.invBlendConstant4F[3]));
			blendFactor.y = *Pointer<Float4>(data + OFFSET(DrawData, factor.invBlendConstant4F[3]));
			blendFactor.z = *Pointer<Float4>(data + OFFSET(DrawData, factor.invBlendConstant4F[3]));
			break;

		default:
			UNSUPPORTED("VkBlendFactor: %d", int(blendFactorActive));
	}
}

void PixelRoutine::blendFactorAlpha(Vector4f &blendFactor, const Vector4f &oC, const Vector4f &pixel, VkBlendFactor blendFactorAlphaActive)
{
	switch(blendFactorAlphaActive)
	{
		case VK_BLEND_FACTOR_ZERO:
			blendFactor.w = Float4(0);
			break;
		case VK_BLEND_FACTOR_ONE:
			blendFactor.w = Float4(1);
			break;
		case VK_BLEND_FACTOR_SRC_COLOR:
			blendFactor.w = oC.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_SRC_COLOR:
			blendFactor.w = Float4(1.0f) - oC.w;
			break;
		case VK_BLEND_FACTOR_DST_COLOR:
			blendFactor.w = pixel.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_DST_COLOR:
			blendFactor.w = Float4(1.0f) - pixel.w;
			break;
		case VK_BLEND_FACTOR_SRC_ALPHA:
			blendFactor.w = oC.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA:
			blendFactor.w = Float4(1.0f) - oC.w;
			break;
		case VK_BLEND_FACTOR_DST_ALPHA:
			blendFactor.w = pixel.w;
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_DST_ALPHA:
			blendFactor.w = Float4(1.0f) - pixel.w;
			break;
		case VK_BLEND_FACTOR_SRC_ALPHA_SATURATE:
			blendFactor.w = Float4(1.0f);
			break;
		case VK_BLEND_FACTOR_CONSTANT_COLOR:
		case VK_BLEND_FACTOR_CONSTANT_ALPHA:
			blendFactor.w = *Pointer<Float4>(data + OFFSET(DrawData, factor.blendConstant4F[3]));
			break;
		case VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR:
		case VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA:
			blendFactor.w = *Pointer<Float4>(data + OFFSET(DrawData, factor.invBlendConstant4F[3]));
			break;
		default:
			UNSUPPORTED("VkBlendFactor: %d", int(blendFactorAlphaActive));
	}
}

void PixelRoutine::alphaBlend(int index, const Pointer<Byte> &cBuffer, Vector4f &oC, const Int &x)
{
	if(!state.blendState[index].alphaBlendEnable)
	{
		return;
	}

	vk::Format format = state.targetFormat[index];
	ASSERT(format.supportsColorAttachmentBlend());

	Pointer<Byte> buffer = cBuffer;
	Int pitchB = *Pointer<Int>(data + OFFSET(DrawData, colorPitchB[index]));

	// pixel holds four texel color values.
	// Note: Despite the type being Vector4f, the colors may be stored as
	// integers. Half-floats are stored as full 32-bit floats.
	// Non-float and non-fixed point formats are not alpha blended.
	Vector4f pixel;

	Vector4s color;
	Short4 c01;
	Short4 c23;

	Float4 one;
	if(format.isFloatFormat())
	{
		one = Float4(1.0f);
	}
	else if(format.isUnnormalizedInteger())
	{
		one = As<Float4>(format.isUnsignedComponent(0) ? Int4(0xFFFFFFFF) : Int4(0x7FFFFFFF));
	}

	switch(state.targetFormat[index])
	{
		case VK_FORMAT_R32_SINT:
		case VK_FORMAT_R32_UINT:
		case VK_FORMAT_R32_SFLOAT:
			// FIXME: movlps
			buffer += 4 * x;
			pixel.x.x = *Pointer<Float>(buffer + 0);
			pixel.x.y = *Pointer<Float>(buffer + 4);
			buffer += pitchB;
			// FIXME: movhps
			pixel.x.z = *Pointer<Float>(buffer + 0);
			pixel.x.w = *Pointer<Float>(buffer + 4);
			pixel.y = pixel.z = pixel.w = one;
			break;
		case VK_FORMAT_R32G32_SINT:
		case VK_FORMAT_R32G32_UINT:
		case VK_FORMAT_R32G32_SFLOAT:
			buffer += 8 * x;
			pixel.x = *Pointer<Float4>(buffer, 16);
			buffer += pitchB;
			pixel.y = *Pointer<Float4>(buffer, 16);
			pixel.z = pixel.x;
			pixel.x = ShuffleLowHigh(pixel.x, pixel.y, 0x0202);
			pixel.z = ShuffleLowHigh(pixel.z, pixel.y, 0x1313);
			pixel.y = pixel.z;
			pixel.z = pixel.w = one;
			break;
		case VK_FORMAT_R32G32B32A32_SFLOAT:
		case VK_FORMAT_R32G32B32A32_SINT:
		case VK_FORMAT_R32G32B32A32_UINT:
			buffer += 16 * x;
			pixel.x = *Pointer<Float4>(buffer + 0, 16);
			pixel.y = *Pointer<Float4>(buffer + 16, 16);
			buffer += pitchB;
			pixel.z = *Pointer<Float4>(buffer + 0, 16);
			pixel.w = *Pointer<Float4>(buffer + 16, 16);
			transpose4x4(pixel.x, pixel.y, pixel.z, pixel.w);
			break;
		case VK_FORMAT_R16_SFLOAT:
			buffer += 2 * x;
			pixel.x.x = Float(*Pointer<Half>(buffer + 0));
			pixel.x.y = Float(*Pointer<Half>(buffer + 2));
			buffer += pitchB;
			pixel.x.z = Float(*Pointer<Half>(buffer + 0));
			pixel.x.w = Float(*Pointer<Half>(buffer + 2));
			pixel.y = pixel.z = pixel.w = one;
			break;
		case VK_FORMAT_R16G16_SFLOAT:
			buffer += 4 * x;
			pixel.x.x = Float(*Pointer<Half>(buffer + 0));
			pixel.y.x = Float(*Pointer<Half>(buffer + 2));
			pixel.x.y = Float(*Pointer<Half>(buffer + 4));
			pixel.y.y = Float(*Pointer<Half>(buffer + 6));
			buffer += pitchB;
			pixel.x.z = Float(*Pointer<Half>(buffer + 0));
			pixel.y.z = Float(*Pointer<Half>(buffer + 2));
			pixel.x.w = Float(*Pointer<Half>(buffer + 4));
			pixel.y.w = Float(*Pointer<Half>(buffer + 6));
			pixel.z = pixel.w = one;
			break;
		case VK_FORMAT_R16G16B16A16_SFLOAT:
			buffer += 8 * x;
			pixel.x.x = Float(*Pointer<Half>(buffer + 0x0));
			pixel.y.x = Float(*Pointer<Half>(buffer + 0x2));
			pixel.z.x = Float(*Pointer<Half>(buffer + 0x4));
			pixel.w.x = Float(*Pointer<Half>(buffer + 0x6));
			pixel.x.y = Float(*Pointer<Half>(buffer + 0x8));
			pixel.y.y = Float(*Pointer<Half>(buffer + 0xa));
			pixel.z.y = Float(*Pointer<Half>(buffer + 0xc));
			pixel.w.y = Float(*Pointer<Half>(buffer + 0xe));
			buffer += pitchB;
			pixel.x.z = Float(*Pointer<Half>(buffer + 0x0));
			pixel.y.z = Float(*Pointer<Half>(buffer + 0x2));
			pixel.z.z = Float(*Pointer<Half>(buffer + 0x4));
			pixel.w.z = Float(*Pointer<Half>(buffer + 0x6));
			pixel.x.w = Float(*Pointer<Half>(buffer + 0x8));
			pixel.y.w = Float(*Pointer<Half>(buffer + 0xa));
			pixel.z.w = Float(*Pointer<Half>(buffer + 0xc));
			pixel.w.w = Float(*Pointer<Half>(buffer + 0xe));
			break;
		case VK_FORMAT_B10G11R11_UFLOAT_PACK32:
			buffer += 4 * x;
			pixel.x = r11g11b10Unpack(*Pointer<UInt>(buffer + 0));
			pixel.y = r11g11b10Unpack(*Pointer<UInt>(buffer + 4));
			buffer += pitchB;
			pixel.z = r11g11b10Unpack(*Pointer<UInt>(buffer + 0));
			pixel.w = r11g11b10Unpack(*Pointer<UInt>(buffer + 4));
			transpose4x3(pixel.x, pixel.y, pixel.z, pixel.w);
			pixel.w = one;
			break;
		default:
			UNSUPPORTED("VkFormat: %d", int(state.targetFormat[index]));
	}

	// Final Color = ObjectColor * SourceBlendFactor + PixelColor * DestinationBlendFactor
	Vector4f sourceFactor;
	Vector4f destFactor;

	blendFactor(sourceFactor, oC, pixel, state.blendState[index].sourceBlendFactor);
	blendFactor(destFactor, oC, pixel, state.blendState[index].destBlendFactor);

	oC.x *= sourceFactor.x;
	oC.y *= sourceFactor.y;
	oC.z *= sourceFactor.z;

	pixel.x *= destFactor.x;
	pixel.y *= destFactor.y;
	pixel.z *= destFactor.z;

	switch(state.blendState[index].blendOperation)
	{
		case VK_BLEND_OP_ADD:
			oC.x += pixel.x;
			oC.y += pixel.y;
			oC.z += pixel.z;
			break;
		case VK_BLEND_OP_SUBTRACT:
			oC.x -= pixel.x;
			oC.y -= pixel.y;
			oC.z -= pixel.z;
			break;
		case VK_BLEND_OP_REVERSE_SUBTRACT:
			oC.x = pixel.x - oC.x;
			oC.y = pixel.y - oC.y;
			oC.z = pixel.z - oC.z;
			break;
		case VK_BLEND_OP_MIN:
			oC.x = Min(oC.x, pixel.x);
			oC.y = Min(oC.y, pixel.y);
			oC.z = Min(oC.z, pixel.z);
			break;
		case VK_BLEND_OP_MAX:
			oC.x = Max(oC.x, pixel.x);
			oC.y = Max(oC.y, pixel.y);
			oC.z = Max(oC.z, pixel.z);
			break;
		case VK_BLEND_OP_SRC_EXT:
			// No operation
			break;
		case VK_BLEND_OP_DST_EXT:
			oC.x = pixel.x;
			oC.y = pixel.y;
			oC.z = pixel.z;
			break;
		case VK_BLEND_OP_ZERO_EXT:
			oC.x = Float4(0.0f);
			oC.y = Float4(0.0f);
			oC.z = Float4(0.0f);
			break;
		default:
			UNSUPPORTED("VkBlendOp: %d", int(state.blendState[index].blendOperation));
	}

	blendFactorAlpha(sourceFactor, oC, pixel, state.blendState[index].sourceBlendFactorAlpha);
	blendFactorAlpha(destFactor, oC, pixel, state.blendState[index].destBlendFactorAlpha);

	oC.w *= sourceFactor.w;
	pixel.w *= destFactor.w;

	switch(state.blendState[index].blendOperationAlpha)
	{
		case VK_BLEND_OP_ADD:
			oC.w += pixel.w;
			break;
		case VK_BLEND_OP_SUBTRACT:
			oC.w -= pixel.w;
			break;
		case VK_BLEND_OP_REVERSE_SUBTRACT:
			pixel.w -= oC.w;
			oC.w = pixel.w;
			break;
		case VK_BLEND_OP_MIN:
			oC.w = Min(oC.w, pixel.w);
			break;
		case VK_BLEND_OP_MAX:
			oC.w = Max(oC.w, pixel.w);
			break;
		case VK_BLEND_OP_SRC_EXT:
			// No operation
			break;
		case VK_BLEND_OP_DST_EXT:
			oC.w = pixel.w;
			break;
		case VK_BLEND_OP_ZERO_EXT:
			oC.w = Float4(0.0f);
			break;
		default:
			UNSUPPORTED("VkBlendOp: %d", int(state.blendState[index].blendOperationAlpha));
	}

	if(format.isUnsignedComponent(0)) { oC.x = Max(oC.x, Float4(0.0f)); }
	if(format.isUnsignedComponent(1)) { oC.y = Max(oC.y, Float4(0.0f)); }
	if(format.isUnsignedComponent(2)) { oC.z = Max(oC.z, Float4(0.0f)); }
	if(format.isUnsignedComponent(3)) { oC.w = Max(oC.w, Float4(0.0f)); }
}

void PixelRoutine::writeColor(int index, const Pointer<Byte> &cBuffer, const Int &x, Vector4f &oC, const Int &sMask, const Int &zMask, const Int &cMask)
{
	switch(state.targetFormat[index])
	{
		case VK_FORMAT_R16_SFLOAT:
		case VK_FORMAT_R32_SFLOAT:
		case VK_FORMAT_R32_SINT:
		case VK_FORMAT_R32_UINT:
		case VK_FORMAT_R16_SINT:
		case VK_FORMAT_R16_UINT:
		case VK_FORMAT_R8_SINT:
		case VK_FORMAT_R8_UINT:
		case VK_FORMAT_A2B10G10R10_UINT_PACK32:
		case VK_FORMAT_A2R10G10B10_UINT_PACK32:
			break;
		case VK_FORMAT_R16G16_SFLOAT:
		case VK_FORMAT_R32G32_SFLOAT:
		case VK_FORMAT_R32G32_SINT:
		case VK_FORMAT_R32G32_UINT:
		case VK_FORMAT_R16G16_SINT:
		case VK_FORMAT_R16G16_UINT:
		case VK_FORMAT_R8G8_SINT:
		case VK_FORMAT_R8G8_UINT:
			oC.z = oC.x;
			oC.x = UnpackLow(oC.x, oC.y);
			oC.z = UnpackHigh(oC.z, oC.y);
			oC.y = oC.z;
			break;
		case VK_FORMAT_R16G16B16A16_SFLOAT:
		case VK_FORMAT_B10G11R11_UFLOAT_PACK32:
		case VK_FORMAT_R32G32B32A32_SFLOAT:
		case VK_FORMAT_R32G32B32A32_SINT:
		case VK_FORMAT_R32G32B32A32_UINT:
		case VK_FORMAT_R16G16B16A16_SINT:
		case VK_FORMAT_R16G16B16A16_UINT:
		case VK_FORMAT_R8G8B8A8_SINT:
		case VK_FORMAT_R8G8B8A8_UINT:
		case VK_FORMAT_A8B8G8R8_UINT_PACK32:
		case VK_FORMAT_A8B8G8R8_SINT_PACK32:
			transpose4x4(oC.x, oC.y, oC.z, oC.w);
			break;
		default:
			UNSUPPORTED("VkFormat: %d", int(state.targetFormat[index]));
	}

	int rgbaWriteMask = state.colorWriteActive(index) & outputMasks[index];
	int bgraWriteMask = (rgbaWriteMask & 0x0000000A) | (rgbaWriteMask & 0x00000001) << 2 | (rgbaWriteMask & 0x00000004) >> 2;

	Int xMask;  // Combination of all masks

	if(state.depthTestActive)
	{
		xMask = zMask;
	}
	else
	{
		xMask = cMask;
	}

	if(state.stencilActive)
	{
		xMask &= sMask;
	}

	auto targetFormat = state.targetFormat[index];

	Pointer<Byte> buffer = cBuffer;
	Int pitchB = *Pointer<Int>(data + OFFSET(DrawData, colorPitchB[index]));
	Float4 value;

	switch(targetFormat)
	{
		case VK_FORMAT_R32_SFLOAT:
		case VK_FORMAT_R32_SINT:
		case VK_FORMAT_R32_UINT:
			if(rgbaWriteMask & 0x00000001)
			{
				buffer += 4 * x;

				// FIXME: movlps
				value.x = *Pointer<Float>(buffer + 0);
				value.y = *Pointer<Float>(buffer + 4);

				buffer += pitchB;

				// FIXME: movhps
				value.z = *Pointer<Float>(buffer + 0);
				value.w = *Pointer<Float>(buffer + 4);

				oC.x = As<Float4>(As<Int4>(oC.x) & *Pointer<Int4>(constants + OFFSET(Constants, maskD4X) + xMask * 16, 16));
				value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskD4X) + xMask * 16, 16));
				oC.x = As<Float4>(As<Int4>(oC.x) | As<Int4>(value));

				// FIXME: movhps
				*Pointer<Float>(buffer + 0) = oC.x.z;
				*Pointer<Float>(buffer + 4) = oC.x.w;

				buffer -= pitchB;

				// FIXME: movlps
				*Pointer<Float>(buffer + 0) = oC.x.x;
				*Pointer<Float>(buffer + 4) = oC.x.y;
			}
			break;
		case VK_FORMAT_R16_SFLOAT:
			if(rgbaWriteMask & 0x00000001)
			{
				buffer += 2 * x;

				value = Insert(value, Float(*Pointer<Half>(buffer + 0)), 0);
				value = Insert(value, Float(*Pointer<Half>(buffer + 2)), 1);

				buffer += pitchB;

				value = Insert(value, Float(*Pointer<Half>(buffer + 0)), 2);
				value = Insert(value, Float(*Pointer<Half>(buffer + 2)), 3);

				oC.x = As<Float4>(As<Int4>(oC.x) & *Pointer<Int4>(constants + OFFSET(Constants, maskD4X) + xMask * 16, 16));
				value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskD4X) + xMask * 16, 16));
				oC.x = As<Float4>(As<Int4>(oC.x) | As<Int4>(value));

				*Pointer<Half>(buffer + 0) = Half(oC.x.z);
				*Pointer<Half>(buffer + 2) = Half(oC.x.w);

				buffer -= pitchB;

				*Pointer<Half>(buffer + 0) = Half(oC.x.x);
				*Pointer<Half>(buffer + 2) = Half(oC.x.y);
			}
			break;
		case VK_FORMAT_R16_SINT:
		case VK_FORMAT_R16_UINT:
			if(rgbaWriteMask & 0x00000001)
			{
				buffer += 2 * x;

				UShort4 xyzw;
				xyzw = As<UShort4>(Insert(As<Int2>(xyzw), *Pointer<Int>(buffer), 0));

				buffer += pitchB;

				xyzw = As<UShort4>(Insert(As<Int2>(xyzw), *Pointer<Int>(buffer), 1));
				value = As<Float4>(Int4(xyzw));

				oC.x = As<Float4>(As<Int4>(oC.x) & *Pointer<Int4>(constants + OFFSET(Constants, maskD4X) + xMask * 16, 16));
				value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskD4X) + xMask * 16, 16));
				oC.x = As<Float4>(As<Int4>(oC.x) | As<Int4>(value));

				if(targetFormat == VK_FORMAT_R16_SINT)
				{
					Float component = oC.x.z;
					*Pointer<Short>(buffer + 0) = Short(As<Int>(component));
					component = oC.x.w;
					*Pointer<Short>(buffer + 2) = Short(As<Int>(component));

					buffer -= pitchB;

					component = oC.x.x;
					*Pointer<Short>(buffer + 0) = Short(As<Int>(component));
					component = oC.x.y;
					*Pointer<Short>(buffer + 2) = Short(As<Int>(component));
				}
				else  // VK_FORMAT_R16_UINT
				{
					Float component = oC.x.z;
					*Pointer<UShort>(buffer + 0) = UShort(As<Int>(component));
					component = oC.x.w;
					*Pointer<UShort>(buffer + 2) = UShort(As<Int>(component));

					buffer -= pitchB;

					component = oC.x.x;
					*Pointer<UShort>(buffer + 0) = UShort(As<Int>(component));
					component = oC.x.y;
					*Pointer<UShort>(buffer + 2) = UShort(As<Int>(component));
				}
			}
			break;
		case VK_FORMAT_R8_SINT:
		case VK_FORMAT_R8_UINT:
			if(rgbaWriteMask & 0x00000001)
			{
				buffer += x;

				UInt xyzw, packedCol;

				xyzw = UInt(*Pointer<UShort>(buffer)) & 0xFFFF;
				buffer += pitchB;
				xyzw |= UInt(*Pointer<UShort>(buffer)) << 16;

				Short4 tmpCol = Short4(As<Int4>(oC.x));
				if(targetFormat == VK_FORMAT_R8_SINT)
				{
					tmpCol = As<Short4>(PackSigned(tmpCol, tmpCol));
				}
				else
				{
					tmpCol = As<Short4>(PackUnsigned(tmpCol, tmpCol));
				}
				packedCol = Extract(As<Int2>(tmpCol), 0);

				packedCol = (packedCol & *Pointer<UInt>(constants + OFFSET(Constants, maskB4Q) + 8 * xMask)) |
				            (xyzw & *Pointer<UInt>(constants + OFFSET(Constants, invMaskB4Q) + 8 * xMask));

				*Pointer<UShort>(buffer) = UShort(packedCol >> 16);
				buffer -= pitchB;
				*Pointer<UShort>(buffer) = UShort(packedCol);
			}
			break;
		case VK_FORMAT_R32G32_SFLOAT:
		case VK_FORMAT_R32G32_SINT:
		case VK_FORMAT_R32G32_UINT:
			buffer += 8 * x;

			value = *Pointer<Float4>(buffer);

			if((rgbaWriteMask & 0x00000003) != 0x00000003)
			{
				Float4 masked = value;
				oC.x = As<Float4>(As<Int4>(oC.x) & *Pointer<Int4>(constants + OFFSET(Constants, maskD01X[rgbaWriteMask & 0x3][0])));
				masked = As<Float4>(As<Int4>(masked) & *Pointer<Int4>(constants + OFFSET(Constants, maskD01X[~rgbaWriteMask & 0x3][0])));
				oC.x = As<Float4>(As<Int4>(oC.x) | As<Int4>(masked));
			}

			oC.x = As<Float4>(As<Int4>(oC.x) & *Pointer<Int4>(constants + OFFSET(Constants, maskQ01X) + xMask * 16, 16));
			value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskQ01X) + xMask * 16, 16));
			oC.x = As<Float4>(As<Int4>(oC.x) | As<Int4>(value));
			*Pointer<Float4>(buffer) = oC.x;

			buffer += pitchB;

			value = *Pointer<Float4>(buffer);

			if((rgbaWriteMask & 0x00000003) != 0x00000003)
			{
				Float4 masked;

				masked = value;
				oC.y = As<Float4>(As<Int4>(oC.y) & *Pointer<Int4>(constants + OFFSET(Constants, maskD01X[rgbaWriteMask & 0x3][0])));
				masked = As<Float4>(As<Int4>(masked) & *Pointer<Int4>(constants + OFFSET(Constants, maskD01X[~rgbaWriteMask & 0x3][0])));
				oC.y = As<Float4>(As<Int4>(oC.y) | As<Int4>(masked));
			}

			oC.y = As<Float4>(As<Int4>(oC.y) & *Pointer<Int4>(constants + OFFSET(Constants, maskQ23X) + xMask * 16, 16));
			value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskQ23X) + xMask * 16, 16));
			oC.y = As<Float4>(As<Int4>(oC.y) | As<Int4>(value));
			*Pointer<Float4>(buffer) = oC.y;
			break;
		case VK_FORMAT_R16G16_SFLOAT:
			if((rgbaWriteMask & 0x00000003) != 0x0)
			{
				buffer += 4 * x;

				UInt2 rgbaMask;
				UInt2 packedCol;
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.x.y))) << 16) | UInt(As<UShort>(Half(oC.x.x))), 0);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.x.w))) << 16) | UInt(As<UShort>(Half(oC.x.z))), 1);

				UShort4 value = *Pointer<UShort4>(buffer);
				UInt2 mergedMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
				if((rgbaWriteMask & 0x3) != 0x3)
				{
					Int tmpMask = *Pointer<Int>(constants + OFFSET(Constants, maskW4Q[rgbaWriteMask & 0x3][0]));
					rgbaMask = As<UInt2>(Int2(tmpMask, tmpMask));
					mergedMask &= rgbaMask;
				}
				*Pointer<UInt2>(buffer) = (packedCol & mergedMask) | (As<UInt2>(value) & ~mergedMask);

				buffer += pitchB;

				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.y.y))) << 16) | UInt(As<UShort>(Half(oC.y.x))), 0);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.y.w))) << 16) | UInt(As<UShort>(Half(oC.y.z))), 1);
				value = *Pointer<UShort4>(buffer);
				mergedMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
				if((rgbaWriteMask & 0x3) != 0x3)
				{
					mergedMask &= rgbaMask;
				}
				*Pointer<UInt2>(buffer) = (packedCol & mergedMask) | (As<UInt2>(value) & ~mergedMask);
			}
			break;
		case VK_FORMAT_R16G16_SINT:
		case VK_FORMAT_R16G16_UINT:
			if((rgbaWriteMask & 0x00000003) != 0x0)
			{
				buffer += 4 * x;

				UInt2 rgbaMask;
				UShort4 packedCol = UShort4(As<Int4>(oC.x));
				UShort4 value = *Pointer<UShort4>(buffer);
				UInt2 mergedMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
				if((rgbaWriteMask & 0x3) != 0x3)
				{
					Int tmpMask = *Pointer<Int>(constants + OFFSET(Constants, maskW4Q[rgbaWriteMask & 0x3][0]));
					rgbaMask = As<UInt2>(Int2(tmpMask, tmpMask));
					mergedMask &= rgbaMask;
				}
				*Pointer<UInt2>(buffer) = (As<UInt2>(packedCol) & mergedMask) | (As<UInt2>(value) & ~mergedMask);

				buffer += pitchB;

				packedCol = UShort4(As<Int4>(oC.y));
				value = *Pointer<UShort4>(buffer);
				mergedMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
				if((rgbaWriteMask & 0x3) != 0x3)
				{
					mergedMask &= rgbaMask;
				}
				*Pointer<UInt2>(buffer) = (As<UInt2>(packedCol) & mergedMask) | (As<UInt2>(value) & ~mergedMask);
			}
			break;
		case VK_FORMAT_R8G8_SINT:
		case VK_FORMAT_R8G8_UINT:
			if((rgbaWriteMask & 0x00000003) != 0x0)
			{
				buffer += 2 * x;

				Int2 xyzw, packedCol;

				xyzw = Insert(xyzw, *Pointer<Int>(buffer), 0);
				buffer += pitchB;
				xyzw = Insert(xyzw, *Pointer<Int>(buffer), 1);

				if(targetFormat == VK_FORMAT_R8G8_SINT)
				{
					packedCol = As<Int2>(PackSigned(Short4(As<Int4>(oC.x)), Short4(As<Int4>(oC.y))));
				}
				else
				{
					packedCol = As<Int2>(PackUnsigned(Short4(As<Int4>(oC.x)), Short4(As<Int4>(oC.y))));
				}

				UInt2 mergedMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskW4Q) + xMask * 8);
				if((rgbaWriteMask & 0x3) != 0x3)
				{
					Int tmpMask = *Pointer<Int>(constants + OFFSET(Constants, maskB4Q[5 * (rgbaWriteMask & 0x3)][0]));
					UInt2 rgbaMask = As<UInt2>(Int2(tmpMask, tmpMask));
					mergedMask &= rgbaMask;
				}

				packedCol = As<Int2>((As<UInt2>(packedCol) & mergedMask) | (As<UInt2>(xyzw) & ~mergedMask));

				*Pointer<UInt>(buffer) = As<UInt>(Extract(packedCol, 1));
				buffer -= pitchB;
				*Pointer<UInt>(buffer) = As<UInt>(Extract(packedCol, 0));
			}
			break;
		case VK_FORMAT_R32G32B32A32_SFLOAT:
		case VK_FORMAT_R32G32B32A32_SINT:
		case VK_FORMAT_R32G32B32A32_UINT:
			buffer += 16 * x;

			{
				value = *Pointer<Float4>(buffer, 16);

				if(rgbaWriteMask != 0x0000000F)
				{
					Float4 masked = value;
					oC.x = As<Float4>(As<Int4>(oC.x) & *Pointer<Int4>(constants + OFFSET(Constants, maskD4X[rgbaWriteMask][0])));
					masked = As<Float4>(As<Int4>(masked) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskD4X[rgbaWriteMask][0])));
					oC.x = As<Float4>(As<Int4>(oC.x) | As<Int4>(masked));
				}

				oC.x = As<Float4>(As<Int4>(oC.x) & *Pointer<Int4>(constants + OFFSET(Constants, maskX0X) + xMask * 16, 16));
				value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskX0X) + xMask * 16, 16));
				oC.x = As<Float4>(As<Int4>(oC.x) | As<Int4>(value));
				*Pointer<Float4>(buffer, 16) = oC.x;
			}

			{
				value = *Pointer<Float4>(buffer + 16, 16);

				if(rgbaWriteMask != 0x0000000F)
				{
					Float4 masked = value;
					oC.y = As<Float4>(As<Int4>(oC.y) & *Pointer<Int4>(constants + OFFSET(Constants, maskD4X[rgbaWriteMask][0])));
					masked = As<Float4>(As<Int4>(masked) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskD4X[rgbaWriteMask][0])));
					oC.y = As<Float4>(As<Int4>(oC.y) | As<Int4>(masked));
				}

				oC.y = As<Float4>(As<Int4>(oC.y) & *Pointer<Int4>(constants + OFFSET(Constants, maskX1X) + xMask * 16, 16));
				value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskX1X) + xMask * 16, 16));
				oC.y = As<Float4>(As<Int4>(oC.y) | As<Int4>(value));
				*Pointer<Float4>(buffer + 16, 16) = oC.y;
			}

			buffer += pitchB;

			{
				value = *Pointer<Float4>(buffer, 16);

				if(rgbaWriteMask != 0x0000000F)
				{
					Float4 masked = value;
					oC.z = As<Float4>(As<Int4>(oC.z) & *Pointer<Int4>(constants + OFFSET(Constants, maskD4X[rgbaWriteMask][0])));
					masked = As<Float4>(As<Int4>(masked) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskD4X[rgbaWriteMask][0])));
					oC.z = As<Float4>(As<Int4>(oC.z) | As<Int4>(masked));
				}

				oC.z = As<Float4>(As<Int4>(oC.z) & *Pointer<Int4>(constants + OFFSET(Constants, maskX2X) + xMask * 16, 16));
				value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskX2X) + xMask * 16, 16));
				oC.z = As<Float4>(As<Int4>(oC.z) | As<Int4>(value));
				*Pointer<Float4>(buffer, 16) = oC.z;
			}

			{
				value = *Pointer<Float4>(buffer + 16, 16);

				if(rgbaWriteMask != 0x0000000F)
				{
					Float4 masked = value;
					oC.w = As<Float4>(As<Int4>(oC.w) & *Pointer<Int4>(constants + OFFSET(Constants, maskD4X[rgbaWriteMask][0])));
					masked = As<Float4>(As<Int4>(masked) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskD4X[rgbaWriteMask][0])));
					oC.w = As<Float4>(As<Int4>(oC.w) | As<Int4>(masked));
				}

				oC.w = As<Float4>(As<Int4>(oC.w) & *Pointer<Int4>(constants + OFFSET(Constants, maskX3X) + xMask * 16, 16));
				value = As<Float4>(As<Int4>(value) & *Pointer<Int4>(constants + OFFSET(Constants, invMaskX3X) + xMask * 16, 16));
				oC.w = As<Float4>(As<Int4>(oC.w) | As<Int4>(value));
				*Pointer<Float4>(buffer + 16, 16) = oC.w;
			}
			break;
		case VK_FORMAT_R16G16B16A16_SFLOAT:
			if((rgbaWriteMask & 0x0000000F) != 0x0)
			{
				buffer += 8 * x;

				UInt4 rgbaMask;
				UInt4 value = *Pointer<UInt4>(buffer);
				UInt4 packedCol;
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.x.y))) << 16) | UInt(As<UShort>(Half(oC.x.x))), 0);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.x.w))) << 16) | UInt(As<UShort>(Half(oC.x.z))), 1);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.y.y))) << 16) | UInt(As<UShort>(Half(oC.y.x))), 2);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.y.w))) << 16) | UInt(As<UShort>(Half(oC.y.z))), 3);
				UInt4 mergedMask = *Pointer<UInt4>(constants + OFFSET(Constants, maskQ01X) + xMask * 16);
				if((rgbaWriteMask & 0xF) != 0xF)
				{
					UInt2 tmpMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskW4Q[rgbaWriteMask][0]));
					rgbaMask = UInt4(tmpMask, tmpMask);
					mergedMask &= rgbaMask;
				}
				*Pointer<UInt4>(buffer) = (packedCol & mergedMask) | (As<UInt4>(value) & ~mergedMask);

				buffer += pitchB;

				value = *Pointer<UInt4>(buffer);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.z.y))) << 16) | UInt(As<UShort>(Half(oC.z.x))), 0);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.z.w))) << 16) | UInt(As<UShort>(Half(oC.z.z))), 1);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.w.y))) << 16) | UInt(As<UShort>(Half(oC.w.x))), 2);
				packedCol = Insert(packedCol, (UInt(As<UShort>(Half(oC.w.w))) << 16) | UInt(As<UShort>(Half(oC.w.z))), 3);
				mergedMask = *Pointer<UInt4>(constants + OFFSET(Constants, maskQ23X) + xMask * 16);
				if((rgbaWriteMask & 0xF) != 0xF)
				{
					mergedMask &= rgbaMask;
				}
				*Pointer<UInt4>(buffer) = (packedCol & mergedMask) | (As<UInt4>(value) & ~mergedMask);
			}
			break;
		case VK_FORMAT_B10G11R11_UFLOAT_PACK32:
			if((rgbaWriteMask & 0x7) != 0x0)
			{
				buffer += 4 * x;

				UInt4 packedCol;
				packedCol = Insert(packedCol, r11g11b10Pack(oC.x), 0);
				packedCol = Insert(packedCol, r11g11b10Pack(oC.y), 1);
				packedCol = Insert(packedCol, r11g11b10Pack(oC.z), 2);
				packedCol = Insert(packedCol, r11g11b10Pack(oC.w), 3);

				UInt4 value;
				value = Insert(value, *Pointer<UInt>(buffer + 0), 0);
				value = Insert(value, *Pointer<UInt>(buffer + 4), 1);
				buffer += pitchB;
				value = Insert(value, *Pointer<UInt>(buffer + 0), 2);
				value = Insert(value, *Pointer<UInt>(buffer + 4), 3);

				UInt4 mask = *Pointer<UInt4>(constants + OFFSET(Constants, maskD4X[0][0]) + xMask * 16, 16);
				if((rgbaWriteMask & 0x7) != 0x7)
				{
					mask &= *Pointer<UInt4>(constants + OFFSET(Constants, mask11X[rgbaWriteMask & 0x7][0]), 16);
				}
				value = (packedCol & mask) | (value & ~mask);

				*Pointer<UInt>(buffer + 0) = value.z;
				*Pointer<UInt>(buffer + 4) = value.w;
				buffer -= pitchB;
				*Pointer<UInt>(buffer + 0) = value.x;
				*Pointer<UInt>(buffer + 4) = value.y;
			}
			break;
		case VK_FORMAT_R16G16B16A16_SINT:
		case VK_FORMAT_R16G16B16A16_UINT:
			if((rgbaWriteMask & 0x0000000F) != 0x0)
			{
				buffer += 8 * x;

				UInt4 rgbaMask;
				UShort8 value = *Pointer<UShort8>(buffer);
				UShort8 packedCol = UShort8(UShort4(As<Int4>(oC.x)), UShort4(As<Int4>(oC.y)));
				UInt4 mergedMask = *Pointer<UInt4>(constants + OFFSET(Constants, maskQ01X) + xMask * 16);
				if((rgbaWriteMask & 0xF) != 0xF)
				{
					UInt2 tmpMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskW4Q[rgbaWriteMask][0]));
					rgbaMask = UInt4(tmpMask, tmpMask);
					mergedMask &= rgbaMask;
				}
				*Pointer<UInt4>(buffer) = (As<UInt4>(packedCol) & mergedMask) | (As<UInt4>(value) & ~mergedMask);

				buffer += pitchB;

				value = *Pointer<UShort8>(buffer);
				packedCol = UShort8(UShort4(As<Int4>(oC.z)), UShort4(As<Int4>(oC.w)));
				mergedMask = *Pointer<UInt4>(constants + OFFSET(Constants, maskQ23X) + xMask * 16);
				if((rgbaWriteMask & 0xF) != 0xF)
				{
					mergedMask &= rgbaMask;
				}
				*Pointer<UInt4>(buffer) = (As<UInt4>(packedCol) & mergedMask) | (As<UInt4>(value) & ~mergedMask);
			}
			break;
		case VK_FORMAT_R8G8B8A8_SINT:
		case VK_FORMAT_R8G8B8A8_UINT:
		case VK_FORMAT_A8B8G8R8_UINT_PACK32:
		case VK_FORMAT_A8B8G8R8_SINT_PACK32:
			if((rgbaWriteMask & 0x0000000F) != 0x0)
			{
				UInt2 value, packedCol, mergedMask;

				buffer += 4 * x;

				bool isSigned = targetFormat == VK_FORMAT_R8G8B8A8_SINT || targetFormat == VK_FORMAT_A8B8G8R8_SINT_PACK32;

				if(isSigned)
				{
					packedCol = As<UInt2>(PackSigned(Short4(As<Int4>(oC.x)), Short4(As<Int4>(oC.y))));
				}
				else
				{
					packedCol = As<UInt2>(PackUnsigned(Short4(As<Int4>(oC.x)), Short4(As<Int4>(oC.y))));
				}
				value = *Pointer<UInt2>(buffer, 16);
				mergedMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
				if(rgbaWriteMask != 0xF)
				{
					mergedMask &= *Pointer<UInt2>(constants + OFFSET(Constants, maskB4Q[rgbaWriteMask][0]));
				}
				*Pointer<UInt2>(buffer) = (packedCol & mergedMask) | (value & ~mergedMask);

				buffer += pitchB;

				if(isSigned)
				{
					packedCol = As<UInt2>(PackSigned(Short4(As<Int4>(oC.z)), Short4(As<Int4>(oC.w))));
				}
				else
				{
					packedCol = As<UInt2>(PackUnsigned(Short4(As<Int4>(oC.z)), Short4(As<Int4>(oC.w))));
				}
				value = *Pointer<UInt2>(buffer, 16);
				mergedMask = *Pointer<UInt2>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
				if(rgbaWriteMask != 0xF)
				{
					mergedMask &= *Pointer<UInt2>(constants + OFFSET(Constants, maskB4Q[rgbaWriteMask][0]));
				}
				*Pointer<UInt2>(buffer) = (packedCol & mergedMask) | (value & ~mergedMask);
			}
			break;
		case VK_FORMAT_A2B10G10R10_UINT_PACK32:
			if((rgbaWriteMask & 0x0000000F) != 0x0)
			{
				Int2 mergedMask, packedCol, value;
				Int4 packed = ((As<Int4>(oC.w) & Int4(0x3)) << 30) |
				              ((As<Int4>(oC.z) & Int4(0x3ff)) << 20) |
				              ((As<Int4>(oC.y) & Int4(0x3ff)) << 10) |
				              ((As<Int4>(oC.x) & Int4(0x3ff)));

				buffer += 4 * x;
				value = *Pointer<Int2>(buffer, 16);
				mergedMask = *Pointer<Int2>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
				if(rgbaWriteMask != 0xF)
				{
					mergedMask &= *Pointer<Int2>(constants + OFFSET(Constants, mask10Q[rgbaWriteMask][0]));
				}
				*Pointer<Int2>(buffer) = (As<Int2>(packed) & mergedMask) | (value & ~mergedMask);

				buffer += pitchB;

				value = *Pointer<Int2>(buffer, 16);
				mergedMask = *Pointer<Int2>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
				if(rgbaWriteMask != 0xF)
				{
					mergedMask &= *Pointer<Int2>(constants + OFFSET(Constants, mask10Q[rgbaWriteMask][0]));
				}
				*Pointer<Int2>(buffer) = (As<Int2>(Int4(packed.zwww)) & mergedMask) | (value & ~mergedMask);
			}
			break;
		case VK_FORMAT_A2R10G10B10_UINT_PACK32:
			if((bgraWriteMask & 0x0000000F) != 0x0)
			{
				Int2 mergedMask, packedCol, value;
				Int4 packed = ((As<Int4>(oC.w) & Int4(0x3)) << 30) |
				              ((As<Int4>(oC.x) & Int4(0x3ff)) << 20) |
				              ((As<Int4>(oC.y) & Int4(0x3ff)) << 10) |
				              ((As<Int4>(oC.z) & Int4(0x3ff)));

				buffer += 4 * x;
				value = *Pointer<Int2>(buffer, 16);
				mergedMask = *Pointer<Int2>(constants + OFFSET(Constants, maskD01Q) + xMask * 8);
				if(bgraWriteMask != 0xF)
				{
					mergedMask &= *Pointer<Int2>(constants + OFFSET(Constants, mask10Q[bgraWriteMask][0]));
				}
				*Pointer<Int2>(buffer) = (As<Int2>(packed) & mergedMask) | (value & ~mergedMask);

				buffer += *Pointer<Int>(data + OFFSET(DrawData, colorPitchB[index]));

				value = *Pointer<Int2>(buffer, 16);
				mergedMask = *Pointer<Int2>(constants + OFFSET(Constants, maskD23Q) + xMask * 8);
				if(bgraWriteMask != 0xF)
				{
					mergedMask &= *Pointer<Int2>(constants + OFFSET(Constants, mask10Q[bgraWriteMask][0]));
				}
				*Pointer<Int2>(buffer) = (As<Int2>(Int4(packed.zwww)) & mergedMask) | (value & ~mergedMask);
			}
			break;
		default:
			UNSUPPORTED("VkFormat: %d", int(targetFormat));
	}
}

UShort4 PixelRoutine::convertFixed16(const Float4 &cf, bool saturate)
{
	return UShort4(cf * Float4(0xFFFF), saturate);
}

void PixelRoutine::sRGBtoLinear16_12_16(Vector4s &c)
{
	Pointer<Byte> LUT = constants + OFFSET(Constants, sRGBtoLinear12_16);

	c.x = AddSat(As<UShort4>(c.x), UShort4(0x0007)) >> 4;
	c.y = AddSat(As<UShort4>(c.y), UShort4(0x0007)) >> 4;
	c.z = AddSat(As<UShort4>(c.z), UShort4(0x0007)) >> 4;

	c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 0))), 0);
	c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 1))), 1);
	c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 2))), 2);
	c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 3))), 3);

	c.y = Insert(c.y, *Pointer<Short>(LUT + 2 * Int(Extract(c.y, 0))), 0);
	c.y = Insert(c.y, *Pointer<Short>(LUT + 2 * Int(Extract(c.y, 1))), 1);
	c.y = Insert(c.y, *Pointer<Short>(LUT + 2 * Int(Extract(c.y, 2))), 2);
	c.y = Insert(c.y, *Pointer<Short>(LUT + 2 * Int(Extract(c.y, 3))), 3);

	c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 0))), 0);
	c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 1))), 1);
	c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 2))), 2);
	c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 3))), 3);
}

void PixelRoutine::linearToSRGB16_12_16(Vector4s &c)
{
	c.x = AddSat(As<UShort4>(c.x), UShort4(0x0007)) >> 4;
	c.y = AddSat(As<UShort4>(c.y), UShort4(0x0007)) >> 4;
	c.z = AddSat(As<UShort4>(c.z), UShort4(0x0007)) >> 4;

	linearToSRGB12_16(c);
}

void PixelRoutine::linearToSRGB12_16(Vector4s &c)
{
	Pointer<Byte> LUT = constants + OFFSET(Constants, linearToSRGB12_16);

	c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 0))), 0);
	c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 1))), 1);
	c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 2))), 2);
	c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 3))), 3);

	c.y = Insert(c.y, *Pointer<Short>(LUT + 2 * Int(Extract(c.y, 0))), 0);
	c.y = Insert(c.y, *Pointer<Short>(LUT + 2 * Int(Extract(c.y, 1))), 1);
	c.y = Insert(c.y, *Pointer<Short>(LUT + 2 * Int(Extract(c.y, 2))), 2);
	c.y = Insert(c.y, *Pointer<Short>(LUT + 2 * Int(Extract(c.y, 3))), 3);

	c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 0))), 0);
	c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 1))), 1);
	c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 2))), 2);
	c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 3))), 3);
}

Float4 PixelRoutine::sRGBtoLinear(const Float4 &x)  // Approximates x^2.2
{
	Float4 linear = x * x;
	linear = linear * Float4(0.73f) + linear * x * Float4(0.27f);

	return Min(Max(linear, Float4(0.0f)), Float4(1.0f));
}

}  // namespace sw