GrGLSLVertexGeoBuilder.h

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/*
 * Copyright 2017 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef GrGLSLVertexGeoBuilder_DEFINED
#define GrGLSLVertexGeoBuilder_DEFINED
 
#include "include/core/SkString.h"
#include "src/core/SkSLTypeShared.h"
#include "src/gpu/ganesh/GrGeometryProcessor.h"
#include "src/gpu/ganesh/glsl/GrGLSLShaderBuilder.h"
 
class GrGLSLProgramBuilder;
 
/**
 * Base class for vertex shader builder. This is the stage that computes input geometry for the
 * rasterizer.
 */
class GrGLSLVertexGeoBuilder : public GrGLSLShaderBuilder {
public:
    // Copies the given text verbatim to the function definitions section. Does not mangle the name.
    // 'functionDefinition' should be a fully valid SkSL function, complete with return type, name,
    // arguments, braces, and a body.
    void insertFunction(const char* functionDefinition) {
        this->functions().append(functionDefinition);
    }
    using GrGLSLShaderBuilder::functions;
    using GrGLSLShaderBuilder::code;
 
protected:
    GrGLSLVertexGeoBuilder(GrGLSLProgramBuilder* program) : INHERITED(program) {}
 
    void emitNormalizedSkPosition(const char* devPos, SkSLType devPosType = SkSLType::kFloat2) {
        this->emitNormalizedSkPosition(&this->code(), devPos, devPosType);
    }
 
    void emitNormalizedSkPosition(SkString* out, const char* devPos,
                                  SkSLType devPosType = SkSLType::kFloat2);
 
    friend class GrGeometryProcessor::ProgramImpl;
 
    using INHERITED = GrGLSLShaderBuilder;
};
 
 
class GrGLSLVertexBuilder : public GrGLSLVertexGeoBuilder {
public:
    GrGLSLVertexBuilder(GrGLSLProgramBuilder* program) : INHERITED(program) {}
 
private:
    void onFinalize() override;
 
    friend class GrGLProgramBuilder;
 
    using INHERITED = GrGLSLVertexGeoBuilder;
};
 
#endif