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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 "GrGLSLShaderBuilder.h"
/**
* Base class for vertex and geometry shader builders. This is the stage that computes input
* geometry for the rasterizer.
*/
class GrGLSLVertexGeoBuilder : public GrGLSLShaderBuilder {
protected:
GrGLSLVertexGeoBuilder(GrGLSLProgramBuilder* program) : INHERITED(program) {}
void emitNormalizedSkPosition(const char* devPos, const char* rtAdjustName,
GrSLType devPosType = GrSLType::kFloat2_GrSLType) {
this->emitNormalizedSkPosition(&this->code(), devPos, rtAdjustName, devPosType);
}
void emitNormalizedSkPosition(SkString* out, const char* devPos, const char* rtAdjustName,
GrSLType devPosType = GrSLType::kFloat2_GrSLType);
friend class GrGLSLGeometryProcessor;
typedef GrGLSLShaderBuilder INHERITED;
};
class GrGLSLVertexBuilder : public GrGLSLVertexGeoBuilder {
public:
GrGLSLVertexBuilder(GrGLSLProgramBuilder* program) : INHERITED(program) {}
private:
void onFinalize() override;
friend class GrGLProgramBuilder;
typedef GrGLSLVertexGeoBuilder INHERITED;
};
class GrGLSLGeometryBuilder : public GrGLSLVertexGeoBuilder {
public:
GrGLSLGeometryBuilder(GrGLSLProgramBuilder* program) : INHERITED(program) {}
enum class InputType {
kPoints,
kLines,
kLinesAdjacency,
kTriangles,
kTrianglesAdjacency
};
enum class OutputType {
kPoints,
kLineStrip,
kTriangleStrip
};
void configure(InputType, OutputType, int maxVertices, int numInvocations = 1);
bool isConfigured() const { return fNumInvocations; }
void emitVertex(const char* devPos, const char* rtAdjustName,
GrSLType devPosType = GrSLType::kFloat2_GrSLType) {
this->emitVertex(&this->code(), devPos, rtAdjustName, devPosType);
}
void emitVertex(SkString* out, const char* devPos, const char* rtAdjustName,
GrSLType devPosType = GrSLType::kFloat2_GrSLType);
void endPrimitive();
private:
void onFinalize() override;
int fNumInvocations = 0;
friend class GrGLProgramBuilder;
typedef GrGLSLVertexGeoBuilder INHERITED;
};
#endif
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