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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrVkPipelineStateBuilder_DEFINED
#define GrVkPipelineStateBuilder_DEFINED
#include "GrPipeline.h"
#include "GrProgramDesc.h"
#include "GrVkPipelineState.h"
#include "GrVkUniformHandler.h"
#include "GrVkVaryingHandler.h"
#include "SkSLCompiler.h"
#include "glsl/GrGLSLProgramBuilder.h"
#include "vk/GrVkDefines.h"
class GrVkGpu;
class GrVkRenderPass;
class GrVkPipelineStateBuilder : public GrGLSLProgramBuilder {
public:
/**
* For Vulkan we want to cache the entire VkPipeline for reuse of draws. The Desc here holds all
* the information needed to differentiate one pipeline from another.
*
* The GrProgramDesc contains all the information need to create the actual shaders for the
* pipeline.
*
* For Vulkan we need to add to the GrProgramDesc to include the rest of the state on the
* pipline. This includes stencil settings, blending information, render pass format, draw face
* information, and primitive type. Note that some state is set dynamically on the pipeline for
* each draw and thus is not included in this descriptor. This includes the viewport, scissor,
* and blend constant.
*/
class Desc : public GrProgramDesc {
public:
static bool Build(Desc*,
const GrPrimitiveProcessor&,
const GrPipeline&,
const GrStencilSettings&,
GrPrimitiveType primitiveType,
const GrShaderCaps&);
private:
typedef GrProgramDesc INHERITED;
};
/** Generates a pipeline state.
*
* The GrVkPipelineState implements what is specified in the GrPipeline and GrPrimitiveProcessor
* as input. After successful generation, the builder result objects are available to be used.
* This function may modify the program key by setting the surface origin key to 0 (unspecified)
* if it turns out the program does not care about the surface origin.
* @return true if generation was successful.
*/
static GrVkPipelineState* CreatePipelineState(GrVkGpu*,
const GrPrimitiveProcessor&,
const GrPipeline&,
const GrStencilSettings&,
GrPrimitiveType,
Desc*,
const GrVkRenderPass& renderPass);
const GrCaps* caps() const override;
GrVkGpu* gpu() const { return fGpu; }
void finalizeFragmentOutputColor(GrShaderVar& outputColor) override;
void finalizeFragmentSecondaryColor(GrShaderVar& outputColor) override;
private:
GrVkPipelineStateBuilder(GrVkGpu*,
const GrPipeline&,
const GrPrimitiveProcessor&,
GrProgramDesc*);
GrVkPipelineState* finalize(const GrStencilSettings&,
GrPrimitiveType primitiveType,
const GrVkRenderPass& renderPass,
Desc*);
bool createVkShaderModule(VkShaderStageFlagBits stage,
const GrGLSLShaderBuilder& builder,
VkShaderModule* shaderModule,
VkPipelineShaderStageCreateInfo* stageInfo,
const SkSL::Program::Settings& settings,
Desc* desc);
GrGLSLUniformHandler* uniformHandler() override { return &fUniformHandler; }
const GrGLSLUniformHandler* uniformHandler() const override { return &fUniformHandler; }
GrGLSLVaryingHandler* varyingHandler() override { return &fVaryingHandler; }
GrVkGpu* fGpu;
GrVkVaryingHandler fVaryingHandler;
GrVkUniformHandler fUniformHandler;
typedef GrGLSLProgramBuilder INHERITED;
};
#endif
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