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// Copyright 2018 The Dawn Authors
//
// 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 "utils/ComboRenderPipelineDescriptor.h"
#include "utils/DawnHelpers.h"
namespace utils {
ComboVertexInputDescriptor::ComboVertexInputDescriptor() {
dawn::VertexInputDescriptor* descriptor = this;
descriptor->indexFormat = dawn::IndexFormat::Uint32;
descriptor->bufferCount = 0;
// Fill the default values for vertexBuffers and vertexAttributes in buffers.
dawn::VertexAttributeDescriptor vertexAttribute;
vertexAttribute.shaderLocation = 0;
vertexAttribute.offset = 0;
vertexAttribute.format = dawn::VertexFormat::Float;
for (uint32_t i = 0; i < kMaxVertexAttributes; ++i) {
cAttributes[i] = vertexAttribute;
}
for (uint32_t i = 0; i < kMaxVertexBuffers; ++i) {
cBuffers[i].stride = 0;
cBuffers[i].stepMode = dawn::InputStepMode::Vertex;
cBuffers[i].attributeCount = 0;
cBuffers[i].attributes = nullptr;
}
// cBuffers[i].attributes points to somewhere in cAttributes. cBuffers[0].attributes
// points to &cAttributes[0] by default. Assuming cBuffers[0] has two attributes, then
// cBuffers[1].attributes should point to &cAttributes[2]. Likewise, if cBuffers[1]
// has 3 attributes, then cBuffers[2].attributes should point to &cAttributes[5].
cBuffers[0].attributes = &cAttributes[0];
descriptor->buffers = &cBuffers[0];
}
ComboRenderPipelineDescriptor::ComboRenderPipelineDescriptor(const dawn::Device& device) {
dawn::RenderPipelineDescriptor* descriptor = this;
descriptor->primitiveTopology = dawn::PrimitiveTopology::TriangleList;
descriptor->sampleCount = 1;
// Set defaults for the vertex stage descriptor.
{ vertexStage.entryPoint = "main"; }
// Set defaults for the fragment stage desriptor.
{
descriptor->fragmentStage = &cFragmentStage;
cFragmentStage.entryPoint = "main";
}
// Set defaults for the input state descriptors.
descriptor->vertexInput = &cVertexInput;
// Set defaults for the rasterization state descriptor.
{
cRasterizationState.frontFace = dawn::FrontFace::CCW;
cRasterizationState.cullMode = dawn::CullMode::None;
cRasterizationState.depthBias = 0;
cRasterizationState.depthBiasSlopeScale = 0.0;
cRasterizationState.depthBiasClamp = 0.0;
descriptor->rasterizationState = &cRasterizationState;
}
// Set defaults for the color state descriptors.
{
descriptor->colorStateCount = 1;
descriptor->colorStates = &cColorStates[0];
dawn::BlendDescriptor blend;
blend.operation = dawn::BlendOperation::Add;
blend.srcFactor = dawn::BlendFactor::One;
blend.dstFactor = dawn::BlendFactor::Zero;
dawn::ColorStateDescriptor colorStateDescriptor;
colorStateDescriptor.format = dawn::TextureFormat::RGBA8Unorm;
colorStateDescriptor.alphaBlend = blend;
colorStateDescriptor.colorBlend = blend;
colorStateDescriptor.writeMask = dawn::ColorWriteMask::All;
for (uint32_t i = 0; i < kMaxColorAttachments; ++i) {
mColorStates[i] = colorStateDescriptor;
cColorStates[i] = &mColorStates[i];
}
}
// Set defaults for the depth stencil state descriptors.
{
dawn::StencilStateFaceDescriptor stencilFace;
stencilFace.compare = dawn::CompareFunction::Always;
stencilFace.failOp = dawn::StencilOperation::Keep;
stencilFace.depthFailOp = dawn::StencilOperation::Keep;
stencilFace.passOp = dawn::StencilOperation::Keep;
cDepthStencilState.format = dawn::TextureFormat::Depth24PlusStencil8;
cDepthStencilState.depthWriteEnabled = false;
cDepthStencilState.depthCompare = dawn::CompareFunction::Always;
cDepthStencilState.stencilBack = stencilFace;
cDepthStencilState.stencilFront = stencilFace;
cDepthStencilState.stencilReadMask = 0xff;
cDepthStencilState.stencilWriteMask = 0xff;
descriptor->depthStencilState = nullptr;
}
descriptor->layout = utils::MakeBasicPipelineLayout(device, nullptr);
}
} // namespace utils