| // Copyright 2017 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 "dawn_native/opengl/RenderPipelineGL.h" |
| |
| #include "dawn_native/opengl/DepthStencilStateGL.h" |
| #include "dawn_native/opengl/DeviceGL.h" |
| #include "dawn_native/opengl/Forward.h" |
| #include "dawn_native/opengl/InputStateGL.h" |
| #include "dawn_native/opengl/PersistentPipelineStateGL.h" |
| |
| namespace dawn_native { namespace opengl { |
| |
| namespace { |
| GLenum GLPrimitiveTopology(dawn::PrimitiveTopology primitiveTopology) { |
| switch (primitiveTopology) { |
| case dawn::PrimitiveTopology::PointList: |
| return GL_POINTS; |
| case dawn::PrimitiveTopology::LineList: |
| return GL_LINES; |
| case dawn::PrimitiveTopology::LineStrip: |
| return GL_LINE_STRIP; |
| case dawn::PrimitiveTopology::TriangleList: |
| return GL_TRIANGLES; |
| case dawn::PrimitiveTopology::TriangleStrip: |
| return GL_TRIANGLE_STRIP; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| GLenum GLBlendFactor(dawn::BlendFactor factor, bool alpha) { |
| switch (factor) { |
| case dawn::BlendFactor::Zero: |
| return GL_ZERO; |
| case dawn::BlendFactor::One: |
| return GL_ONE; |
| case dawn::BlendFactor::SrcColor: |
| return GL_SRC_COLOR; |
| case dawn::BlendFactor::OneMinusSrcColor: |
| return GL_ONE_MINUS_SRC_COLOR; |
| case dawn::BlendFactor::SrcAlpha: |
| return GL_SRC_ALPHA; |
| case dawn::BlendFactor::OneMinusSrcAlpha: |
| return GL_ONE_MINUS_SRC_ALPHA; |
| case dawn::BlendFactor::DstColor: |
| return GL_DST_COLOR; |
| case dawn::BlendFactor::OneMinusDstColor: |
| return GL_ONE_MINUS_DST_COLOR; |
| case dawn::BlendFactor::DstAlpha: |
| return GL_DST_ALPHA; |
| case dawn::BlendFactor::OneMinusDstAlpha: |
| return GL_ONE_MINUS_DST_ALPHA; |
| case dawn::BlendFactor::SrcAlphaSaturated: |
| return GL_SRC_ALPHA_SATURATE; |
| case dawn::BlendFactor::BlendColor: |
| return alpha ? GL_CONSTANT_ALPHA : GL_CONSTANT_COLOR; |
| case dawn::BlendFactor::OneMinusBlendColor: |
| return alpha ? GL_ONE_MINUS_CONSTANT_ALPHA : GL_ONE_MINUS_CONSTANT_COLOR; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| GLenum GLBlendMode(dawn::BlendOperation operation) { |
| switch (operation) { |
| case dawn::BlendOperation::Add: |
| return GL_FUNC_ADD; |
| case dawn::BlendOperation::Subtract: |
| return GL_FUNC_SUBTRACT; |
| case dawn::BlendOperation::ReverseSubtract: |
| return GL_FUNC_REVERSE_SUBTRACT; |
| case dawn::BlendOperation::Min: |
| return GL_MIN; |
| case dawn::BlendOperation::Max: |
| return GL_MAX; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| void ApplyBlendState(uint32_t attachment, const BlendStateDescriptor* descriptor) { |
| if (descriptor->blendEnabled) { |
| glEnablei(GL_BLEND, attachment); |
| glBlendEquationSeparatei(attachment, GLBlendMode(descriptor->colorBlend.operation), |
| GLBlendMode(descriptor->alphaBlend.operation)); |
| glBlendFuncSeparatei(attachment, |
| GLBlendFactor(descriptor->colorBlend.srcFactor, false), |
| GLBlendFactor(descriptor->colorBlend.dstFactor, false), |
| GLBlendFactor(descriptor->alphaBlend.srcFactor, true), |
| GLBlendFactor(descriptor->alphaBlend.dstFactor, true)); |
| } else { |
| glDisablei(GL_BLEND, attachment); |
| } |
| glColorMaski(attachment, descriptor->colorWriteMask & dawn::ColorWriteMask::Red, |
| descriptor->colorWriteMask & dawn::ColorWriteMask::Green, |
| descriptor->colorWriteMask & dawn::ColorWriteMask::Blue, |
| descriptor->colorWriteMask & dawn::ColorWriteMask::Alpha); |
| } |
| |
| } // namespace |
| |
| RenderPipeline::RenderPipeline(Device* device, const RenderPipelineDescriptor* descriptor) |
| : RenderPipelineBase(device, descriptor), |
| mGlPrimitiveTopology(GLPrimitiveTopology(GetPrimitiveTopology())) { |
| PerStage<const ShaderModule*> modules(nullptr); |
| modules[dawn::ShaderStage::Vertex] = ToBackend(descriptor->vertexStage->module); |
| modules[dawn::ShaderStage::Fragment] = ToBackend(descriptor->fragmentStage->module); |
| |
| PipelineGL::Initialize(ToBackend(GetLayout()), modules); |
| } |
| |
| GLenum RenderPipeline::GetGLPrimitiveTopology() const { |
| return mGlPrimitiveTopology; |
| } |
| |
| void RenderPipeline::ApplyNow(PersistentPipelineState& persistentPipelineState) { |
| PipelineGL::ApplyNow(); |
| |
| auto inputState = ToBackend(GetInputState()); |
| glBindVertexArray(inputState->GetVAO()); |
| |
| auto depthStencilState = ToBackend(GetDepthStencilState()); |
| depthStencilState->ApplyNow(persistentPipelineState); |
| |
| for (uint32_t attachmentSlot : IterateBitSet(GetColorAttachmentsMask())) { |
| ApplyBlendState(attachmentSlot, GetBlendStateDescriptor(attachmentSlot)); |
| } |
| } |
| |
| }} // namespace dawn_native::opengl |