michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef GrVertexEffect_DEFINED
michael@0: #define GrVertexEffect_DEFINED
michael@0: 
michael@0: #include "GrEffect.h"
michael@0: 
michael@0: /**
michael@0:  * If an effect needs specialized vertex shader code, then it must inherit from this class.
michael@0:  * Otherwise it won't be able to add vertex attribs, and it might be given a vertexless shader
michael@0:  * program in emitCode.
michael@0:  */
michael@0: class GrVertexEffect : public GrEffect {
michael@0: public:
michael@0:     GrVertexEffect() { fHasVertexCode = true; }
michael@0: 
michael@0: protected:
michael@0:     /**
michael@0:      * Subclasses call this from their constructor to register vertex attributes (at most
michael@0:      * kMaxVertexAttribs). This must only be called from the constructor because GrEffects are
michael@0:      * immutable.
michael@0:      */
michael@0:     void addVertexAttrib(GrSLType type) {
michael@0:         SkASSERT(fVertexAttribTypes.count() < kMaxVertexAttribs);
michael@0:         fVertexAttribTypes.push_back(type);
michael@0:     }
michael@0: 
michael@0: private:
michael@0:     typedef GrEffect INHERITED;
michael@0: };
michael@0: 
michael@0: #endif