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      1 /*
      2  * Copyright 2014 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #ifndef GrGLSLGeometryShaderBuilder_DEFINED
      9 #define GrGLSLGeometryShaderBuilder_DEFINED
     10 
     11 #include "GrGLSLShaderBuilder.h"
     12 
     13 class GrGLSLVarying;
     14 
     15 class GrGLSLGeometryBuilder : public GrGLSLShaderBuilder {
     16 public:
     17     GrGLSLGeometryBuilder(GrGLSLProgramBuilder* program);
     18 
     19     enum class InputType {
     20         kPoints,
     21         kLines,
     22         kLinesAdjacency,
     23         kTriangles,
     24         kTrianglesAdjacency
     25     };
     26 
     27     enum class OutputType {
     28         kPoints,
     29         kLineStrip,
     30         kTriangleStrip
     31     };
     32 
     33     void configure(InputType, OutputType, int maxVertices, int numInvocations = 1);
     34     bool isConfigured() const { return fNumInvocations; }
     35 
     36 private:
     37     void onFinalize() override;
     38 
     39     int fNumInvocations;
     40 
     41     friend class GrGLProgramBuilder;
     42 
     43     typedef GrGLSLShaderBuilder INHERITED;
     44 };
     45 
     46 #endif
     47