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Add alpha blending to Vulkan backend

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This commit is contained in:
Karol Suprynowicz 2024-12-07 19:51:27 +01:00
parent 0af1daaa5a
commit 14b617f3c8
3 changed files with 39 additions and 10 deletions
libraries/gpu-vk/src/gpu/vk
VKBackend.cppVKShared.cppVKShared.h

30
libraries/gpu-vk/src/gpu/vk/VKBackend.cpp
View file

@ -505,8 +505,8 @@ struct Cache {
// Input assembly
{
auto& ia = builder.inputAssemblyState;
ia.topology = PRIMITIVE_TO_VK[pipelineState.primitiveTopology];
auto& inputAssembly = builder.inputAssemblyState;
inputAssembly.topology = PRIMITIVE_TO_VK[pipelineState.primitiveTopology];
// VKTODO: this looks unfinished
// ia.primitiveRestartEnable = ???
// ia.topology = vk::PrimitiveTopology::eTriangleList; ???
@ -535,24 +535,34 @@ struct Cache {
// Rasterization state
{
auto& ra = builder.rasterizationState;
ra.cullMode = (VkCullModeFlagBits)stateData.cullMode;
auto& rasterizationState = builder.rasterizationState;
rasterizationState.cullMode = (VkCullModeFlagBits)stateData.cullMode;
//Bool32 ra.depthBiasEnable;
//float ra.depthBiasConstantFactor;
//float ra.depthBiasClamp;
//float ra.depthBiasSlopeFactor;
//ra.depthClampEnable = VK_TRUE;
ra.depthClampEnable = stateData.flags.depthClampEnable ? VK_TRUE : VK_FALSE; // VKTODO
ra.frontFace = stateData.flags.frontFaceClockwise ? VK_FRONT_FACE_CLOCKWISE : VK_FRONT_FACE_COUNTER_CLOCKWISE;
rasterizationState.depthClampEnable = stateData.flags.depthClampEnable ? VK_TRUE : VK_FALSE; // VKTODO
rasterizationState.frontFace = stateData.flags.frontFaceClockwise ? VK_FRONT_FACE_CLOCKWISE : VK_FRONT_FACE_COUNTER_CLOCKWISE;
// ra.lineWidth
ra.polygonMode = (VkPolygonMode)(2 - stateData.fillMode);
rasterizationState.polygonMode = (VkPolygonMode)(2 - stateData.fillMode);
}
// Color blending
{
auto& cb = builder.colorBlendState;
auto& ass = cb.blendAttachmentStates;
auto& colorBlendState = builder.colorBlendState;
auto& attachmentStates = colorBlendState.blendAttachmentStates;
Q_ASSERT(pipelineState.framebuffer);
auto &blendFunction = stateData.blendFunction;
auto &attachmentState = colorBlendState.blendAttachmentStates[0];
attachmentState.blendEnable = stateData.blendFunction.isEnabled();
attachmentState.srcColorBlendFactor = BLEND_ARGS_TO_VK[blendFunction.getSourceColor()];
attachmentState.dstColorBlendFactor = BLEND_ARGS_TO_VK[blendFunction.getDestinationColor()];
attachmentState.colorBlendOp = BLEND_OPS_TO_VK[blendFunction.getOperationColor()];
attachmentState.srcAlphaBlendFactor = BLEND_ARGS_TO_VK[blendFunction.getSourceAlpha()];
attachmentState.dstAlphaBlendFactor = BLEND_ARGS_TO_VK[blendFunction.getDestinationAlpha()];
attachmentState.alphaBlendOp = BLEND_OPS_TO_VK[blendFunction.getOperationAlpha()];
attachmentState.colorWriteMask = colorMaskToVk(stateData.colorWriteMask);
auto& rbs = pipelineState.framebuffer->getRenderBuffers();
uint32_t rbCount = 0;
for (const auto& rb : rbs) {
@ -562,7 +572,7 @@ struct Cache {
}
for (uint32_t i = 1; i < rbCount; ++i) {
ass.push_back(ass.back());
attachmentStates.push_back(attachmentStates.back());
}
}

17
libraries/gpu-vk/src/gpu/vk/VKShared.cpp
View file

@ -364,3 +364,20 @@ bool gpu::vk::isDepthStencilFormat(VkFormat format) {
}
return false;
}
VkColorComponentFlags gpu::vk::colorMaskToVk(const gpu::State::ColorMask &mask) {
VkColorComponentFlags flags{0};
if (mask & gpu::State::WRITE_RED) {
flags |= VK_COLOR_COMPONENT_R_BIT;
}
if (mask & gpu::State::WRITE_GREEN) {
flags |= VK_COLOR_COMPONENT_G_BIT;
}
if (mask & gpu::State::WRITE_BLUE) {
flags |= VK_COLOR_COMPONENT_B_BIT;
}
if (mask & gpu::State::WRITE_ALPHA) {
flags |= VK_COLOR_COMPONENT_A_BIT;
}
return flags;
}

2
libraries/gpu-vk/src/gpu/vk/VKShared.h
View file

@ -36,6 +36,8 @@ VkFormat evalTexelFormatInternal(const Element& dstFormat);
bool isDepthStencilFormat(VkFormat format);
VkColorComponentFlags colorMaskToVk(const gpu::State::ColorMask &mask);
static const VkBlendOp BLEND_OPS_TO_VK[State::NUM_BLEND_OPS] = {
VK_BLEND_OP_ADD,
VK_BLEND_OP_SUBTRACT,