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 GrGLVertexEffect_DEFINED 9 #define GrGLVertexEffect_DEFINED 10 11 #include "GrGLEffect.h" 12 13 /** 14 * If a GL effect needs a GrGLFullShaderBuilder* object to emit vertex code, then it must inherit 15 * from this class. Since paths don't have vertices, this class is only meant to be used internally 16 * by skia, for special cases. 17 */ 18 class GrGLVertexEffect : public GrGLEffect { 19 public: 20 GrGLVertexEffect(const GrBackendEffectFactory& factory) 21 : INHERITED(factory) { fIsVertexEffect = true; } 22 23 /** 24 * This is similar to emitCode() in the base class, except it takes a full shader builder. 25 * This allows the effect subclass to emit vertex code. 26 */ 27 virtual void emitCode(GrGLFullShaderBuilder* builder, 28 const GrDrawEffect& drawEffect, 29 EffectKey key, 30 const char* outputColor, 31 const char* inputColor, 32 const TransformedCoordsArray& coords, 33 const TextureSamplerArray& samplers) = 0; 34 35 /** 36 * Provide a default override for base class's emitCode() function. 37 */ 38 virtual void emitCode(GrGLShaderBuilder* builder, 39 const GrDrawEffect& drawEffect, 40 EffectKey key, 41 const char* outputColor, 42 const char* inputColor, 43 const TransformedCoordsArray& coords, 44 const TextureSamplerArray& samplers) SK_OVERRIDE { 45 GrCrash("GrGLVertexEffect requires GrGLFullShaderBuilder* overload for emitCode()."); 46 } 47 48 private: 49 typedef GrGLEffect INHERITED; 50 }; 51 52 #endif 53
