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// 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 "Context.hpp"
#include "Primitive.hpp"
#include "System/Memory.hpp"
#include "Vulkan/VkDebug.hpp"
#include "Vulkan/VkImageView.hpp"
#include "Pipeline/SpirvShader.hpp"
#include <string.h>
namespace sw
{
bool booleanFaceRegister = false;
bool fullPixelPositionRegister = false;
bool forceWindowed = false;
bool quadLayoutEnabled = false;
bool postBlendSRGB = false;
bool exactColorRounding = false;
TransparencyAntialiasing transparencyAntialiasing = TRANSPARENCY_NONE;
bool forceClearRegisters = false;
Context::Context()
{
init();
}
Context::~Context()
{
}
void *Context::operator new(size_t bytes)
{
return allocate((unsigned int)bytes);
}
void Context::operator delete(void *pointer, size_t bytes)
{
deallocate(pointer);
}
bool Context::isDrawPoint() const
{
switch(topology)
{
case VK_PRIMITIVE_TOPOLOGY_POINT_LIST:
return true;
case VK_PRIMITIVE_TOPOLOGY_LINE_LIST:
case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN:
break;
default:
UNIMPLEMENTED("topology %d", int(topology));
}
return false;
}
bool Context::isDrawLine() const
{
switch(topology)
{
case VK_PRIMITIVE_TOPOLOGY_LINE_LIST:
case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP:
return true;
case VK_PRIMITIVE_TOPOLOGY_POINT_LIST:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN:
break;
default:
UNIMPLEMENTED("topology %d", int(topology));
}
return false;
}
bool Context::isDrawTriangle() const
{
switch(topology)
{
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP:
case VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN:
return true;
case VK_PRIMITIVE_TOPOLOGY_POINT_LIST:
case VK_PRIMITIVE_TOPOLOGY_LINE_LIST:
case VK_PRIMITIVE_TOPOLOGY_LINE_STRIP:
break;
default:
UNIMPLEMENTED("topology %d", int(topology));
}
return false;
}
void Context::init()
{
// Set vertex streams to null stream
for(int i = 0; i < MAX_VERTEX_INPUTS; i++)
{
input[i].defaults();
}
for(int i = 0; i < RENDERTARGETS; ++i)
{
renderTarget[i] = nullptr;
}
depthBuffer = nullptr;
stencilBuffer = nullptr;
stencilEnable = false;
twoSidedStencil = false;
frontStencil = {};
backStencil = {};
rasterizerDiscard = false;
depthCompareMode = VK_COMPARE_OP_LESS;
depthBoundsTestEnable = false;
depthBufferEnable = false;
depthWriteEnable = false;
alphaBlendEnable = false;
sourceBlendFactorState = VK_BLEND_FACTOR_ONE;
destBlendFactorState = VK_BLEND_FACTOR_ZERO;
blendOperationState = VK_BLEND_OP_ADD;
sourceBlendFactorStateAlpha = VK_BLEND_FACTOR_ONE;
destBlendFactorStateAlpha = VK_BLEND_FACTOR_ZERO;
blendOperationStateAlpha = VK_BLEND_OP_ADD;
cullMode = CULL_CLOCKWISE;
frontFacingCCW = true;
depthBias = 0.0f;
slopeDepthBias = 0.0f;
for(int i = 0; i < RENDERTARGETS; i++)
{
colorWriteMask[i] = 0x0000000F;
}
pipelineLayout = nullptr;
pixelShader = nullptr;
vertexShader = nullptr;
instanceID = 0;
occlusionEnabled = false;
lineWidth = 1.0f;
sampleMask = 0xFFFFFFFF;
alphaToCoverage = false;
}
bool Context::setDepthBufferEnable(bool depthBufferEnable)
{
bool modified = (Context::depthBufferEnable != depthBufferEnable);
Context::depthBufferEnable = depthBufferEnable;
return modified;
}
bool Context::setAlphaBlendEnable(bool alphaBlendEnable)
{
bool modified = (Context::alphaBlendEnable != alphaBlendEnable);
Context::alphaBlendEnable = alphaBlendEnable;
return modified;
}
bool Context::setColorWriteMask(int index, int colorWriteMask)
{
bool modified = (Context::colorWriteMask[index] != colorWriteMask);
Context::colorWriteMask[index] = colorWriteMask;
return modified;
}
bool Context::depthWriteActive() const
{
if(!depthBufferActive()) return false;
return depthWriteEnable;
}
bool Context::alphaTestActive() const
{
return transparencyAntialiasing != TRANSPARENCY_NONE;
}
bool Context::depthBufferActive() const
{
return depthBuffer && depthBufferEnable;
}
bool Context::stencilActive() const
{
return stencilBuffer && stencilEnable;
}
bool Context::alphaBlendActive() const
{
if(!alphaBlendEnable)
{
return false;
}
if(!colorUsed())
{
return false;
}
bool colorBlend = !(blendOperation() == VK_BLEND_OP_SRC_EXT && sourceBlendFactor() == VK_BLEND_FACTOR_ONE);
bool alphaBlend = !(blendOperationAlpha() == VK_BLEND_OP_SRC_EXT && sourceBlendFactorAlpha() == VK_BLEND_FACTOR_ONE);
return colorBlend || alphaBlend;
}
VkBlendFactor Context::sourceBlendFactor() const
{
if(!alphaBlendEnable) return VK_BLEND_FACTOR_ONE;
switch(blendOperationState)
{
case VK_BLEND_OP_ADD:
case VK_BLEND_OP_SUBTRACT:
case VK_BLEND_OP_REVERSE_SUBTRACT:
return sourceBlendFactorState;
case VK_BLEND_OP_MIN:
return VK_BLEND_FACTOR_ONE;
case VK_BLEND_OP_MAX:
return VK_BLEND_FACTOR_ONE;
default:
ASSERT(false);
}
return sourceBlendFactorState;
}
VkBlendFactor Context::destBlendFactor() const
{
if(!alphaBlendEnable) return VK_BLEND_FACTOR_ONE;
switch(blendOperationState)
{
case VK_BLEND_OP_ADD:
case VK_BLEND_OP_SUBTRACT:
case VK_BLEND_OP_REVERSE_SUBTRACT:
return destBlendFactorState;
case VK_BLEND_OP_MIN:
return VK_BLEND_FACTOR_ONE;
case VK_BLEND_OP_MAX:
return VK_BLEND_FACTOR_ONE;
default:
ASSERT(false);
}
return destBlendFactorState;
}
bool Context::allTargetsColorClamp() const
{
// TODO: remove all of this and support VkPhysicalDeviceFeatures::independentBlend instead
for (int i = 0; i < RENDERTARGETS; i++)
{
if (renderTarget[i] && renderTarget[i]->getFormat().isFloatFormat())
{
return false;
}
}
return true;
}
VkBlendOp Context::blendOperation() const
{
if(!alphaBlendEnable) return VK_BLEND_OP_SRC_EXT;
switch(blendOperationState)
{
case VK_BLEND_OP_ADD:
if(sourceBlendFactor() == VK_BLEND_FACTOR_ZERO)
{
if(destBlendFactor() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_ZERO_EXT;
}
else
{
return VK_BLEND_OP_DST_EXT;
}
}
else if(sourceBlendFactor() == VK_BLEND_FACTOR_ONE)
{
if(destBlendFactor() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_SRC_EXT;
}
else
{
return VK_BLEND_OP_ADD;
}
}
else
{
if(destBlendFactor() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_SRC_EXT;
}
else
{
return VK_BLEND_OP_ADD;
}
}
case VK_BLEND_OP_SUBTRACT:
if(sourceBlendFactor() == VK_BLEND_FACTOR_ZERO && allTargetsColorClamp())
{
return VK_BLEND_OP_ZERO_EXT; // Negative, clamped to zero
}
else if(sourceBlendFactor() == VK_BLEND_FACTOR_ONE)
{
if(destBlendFactor() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_SRC_EXT;
}
else
{
return VK_BLEND_OP_SUBTRACT;
}
}
else
{
if(destBlendFactor() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_SRC_EXT;
}
else
{
return VK_BLEND_OP_SUBTRACT;
}
}
case VK_BLEND_OP_REVERSE_SUBTRACT:
if(sourceBlendFactor() == VK_BLEND_FACTOR_ZERO)
{
if(destBlendFactor() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_ZERO_EXT;
}
else
{
return VK_BLEND_OP_DST_EXT;
}
}
else if(sourceBlendFactor() == VK_BLEND_FACTOR_ONE)
{
if(destBlendFactor() == VK_BLEND_FACTOR_ZERO && allTargetsColorClamp())
{
return VK_BLEND_OP_ZERO_EXT; // Negative, clamped to zero
}
else
{
return VK_BLEND_OP_REVERSE_SUBTRACT;
}
}
else
{
if(destBlendFactor() == VK_BLEND_FACTOR_ZERO && allTargetsColorClamp())
{
return VK_BLEND_OP_ZERO_EXT; // Negative, clamped to zero
}
else
{
return VK_BLEND_OP_REVERSE_SUBTRACT;
}
}
case VK_BLEND_OP_MIN:
return VK_BLEND_OP_MIN;
case VK_BLEND_OP_MAX:
return VK_BLEND_OP_MAX;
default:
ASSERT(false);
}
return blendOperationState;
}
VkBlendFactor Context::sourceBlendFactorAlpha() const
{
switch (blendOperationStateAlpha)
{
case VK_BLEND_OP_ADD:
case VK_BLEND_OP_SUBTRACT:
case VK_BLEND_OP_REVERSE_SUBTRACT:
return sourceBlendFactorStateAlpha;
case VK_BLEND_OP_MIN:
return VK_BLEND_FACTOR_ONE;
case VK_BLEND_OP_MAX:
return VK_BLEND_FACTOR_ONE;
default:
ASSERT(false);
}
return sourceBlendFactorStateAlpha;
}
VkBlendFactor Context::destBlendFactorAlpha() const
{
switch (blendOperationStateAlpha)
{
case VK_BLEND_OP_ADD:
case VK_BLEND_OP_SUBTRACT:
case VK_BLEND_OP_REVERSE_SUBTRACT:
return destBlendFactorStateAlpha;
case VK_BLEND_OP_MIN:
return VK_BLEND_FACTOR_ONE;
case VK_BLEND_OP_MAX:
return VK_BLEND_FACTOR_ONE;
default:
ASSERT(false);
}
return destBlendFactorStateAlpha;
}
VkBlendOp Context::blendOperationAlpha() const
{
switch (blendOperationStateAlpha)
{
case VK_BLEND_OP_ADD:
if (sourceBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
{
if (destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_ZERO_EXT;
}
else
{
return VK_BLEND_OP_DST_EXT;
}
}
else if (sourceBlendFactorAlpha() == VK_BLEND_FACTOR_ONE)
{
if (destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_SRC_EXT;
}
else
{
return VK_BLEND_OP_ADD;
}
}
else
{
if (destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_SRC_EXT;
}
else
{
return VK_BLEND_OP_ADD;
}
}
case VK_BLEND_OP_SUBTRACT:
if (sourceBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO && allTargetsColorClamp())
{
return VK_BLEND_OP_ZERO_EXT; // Negative, clamped to zero
}
else if (sourceBlendFactorAlpha() == VK_BLEND_FACTOR_ONE)
{
if (destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_SRC_EXT;
}
else
{
return VK_BLEND_OP_SUBTRACT;
}
}
else
{
if (destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_SRC_EXT;
}
else
{
return VK_BLEND_OP_SUBTRACT;
}
}
case VK_BLEND_OP_REVERSE_SUBTRACT:
if (sourceBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
{
if (destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
{
return VK_BLEND_OP_ZERO_EXT;
}
else
{
return VK_BLEND_OP_DST_EXT;
}
}
else if (sourceBlendFactorAlpha() == VK_BLEND_FACTOR_ONE)
{
if (destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO && allTargetsColorClamp())
{
return VK_BLEND_OP_ZERO_EXT; // Negative, clamped to zero
}
else
{
return VK_BLEND_OP_REVERSE_SUBTRACT;
}
}
else
{
if (destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO && allTargetsColorClamp())
{
return VK_BLEND_OP_ZERO_EXT; // Negative, clamped to zero
}
else
{
return VK_BLEND_OP_REVERSE_SUBTRACT;
}
}
case VK_BLEND_OP_MIN:
return VK_BLEND_OP_MIN;
case VK_BLEND_OP_MAX:
return VK_BLEND_OP_MAX;
default:
ASSERT(false);
}
return blendOperationStateAlpha;
}
VkFormat Context::renderTargetInternalFormat(int index) const
{
if(renderTarget[index])
{
return renderTarget[index]->getFormat();
}
else
{
return VK_FORMAT_UNDEFINED;
}
}
bool Context::colorWriteActive() const
{
for (int i = 0; i < RENDERTARGETS; i++)
{
if (colorWriteActive(i))
{
return true;
}
}
return false;
}
int Context::colorWriteActive(int index) const
{
if(!renderTarget[index] || renderTarget[index]->getFormat() == VK_FORMAT_UNDEFINED)
{
return 0;
}
if(blendOperation() == VK_BLEND_OP_DST_EXT && destBlendFactor() == VK_BLEND_FACTOR_ONE &&
(blendOperationAlpha() == VK_BLEND_OP_DST_EXT && destBlendFactorAlpha() == VK_BLEND_FACTOR_ONE))
{
return 0;
}
return colorWriteMask[index];
}
bool Context::colorUsed() const
{
return colorWriteActive() || alphaTestActive() || (pixelShader && pixelShader->getModes().ContainsKill);
}
}