1 /* 2 * Copyright 2013 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 GrVertexEffect_DEFINED 9 #define GrVertexEffect_DEFINED 10 11 #include "GrEffect.h" 12 13 /** 14 * If an effect needs specialized vertex shader code, then it must inherit from this class. 15 * Otherwise it won't be able to add vertex attribs, and it might be given a vertexless shader 16 * program in emitCode. 17 */ 18 class GrVertexEffect : public GrEffect { 19 public: 20 GrVertexEffect() { fHasVertexCode = true; } 21 22 protected: 23 /** 24 * Subclasses call this from their constructor to register vertex attributes (at most 25 * kMaxVertexAttribs). This must only be called from the constructor because GrEffects are 26 * immutable. 27 */ 28 void addVertexAttrib(GrSLType type) { 29 SkASSERT(fVertexAttribTypes.count() < kMaxVertexAttribs); 30 fVertexAttribTypes.push_back(type); 31 } 32 33 private: 34 typedef GrEffect INHERITED; 35 }; 36 37 #endif 38
