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 GrGLVertexEffect_DEFINED
michael@0: #define GrGLVertexEffect_DEFINED
michael@0: 
michael@0: #include "GrGLEffect.h"
michael@0: 
michael@0: /**
michael@0:  * If a GL effect needs a GrGLFullShaderBuilder* object to emit vertex code, then it must inherit
michael@0:  * from this class. Since paths don't have vertices, this class is only meant to be used internally
michael@0:  * by skia, for special cases.
michael@0:  */
michael@0: class GrGLVertexEffect : public GrGLEffect {
michael@0: public:
michael@0:     GrGLVertexEffect(const GrBackendEffectFactory& factory)
michael@0:         : INHERITED(factory) { fIsVertexEffect = true; }
michael@0: 
michael@0:     /**
michael@0:      * This is similar to emitCode() in the base class, except it takes a full shader builder.
michael@0:      * This allows the effect subclass to emit vertex code.
michael@0:      */
michael@0:     virtual void emitCode(GrGLFullShaderBuilder* builder,
michael@0:                           const GrDrawEffect& drawEffect,
michael@0:                           EffectKey key,
michael@0:                           const char* outputColor,
michael@0:                           const char* inputColor,
michael@0:                           const TransformedCoordsArray& coords,
michael@0:                           const TextureSamplerArray& samplers) = 0;
michael@0: 
michael@0:     /**
michael@0:      * Provide a default override for base class's emitCode() function.
michael@0:      */
michael@0:     virtual void emitCode(GrGLShaderBuilder* builder,
michael@0:                           const GrDrawEffect& drawEffect,
michael@0:                           EffectKey key,
michael@0:                           const char* outputColor,
michael@0:                           const char* inputColor,
michael@0:                           const TransformedCoordsArray& coords,
michael@0:                           const TextureSamplerArray& samplers) SK_OVERRIDE {
michael@0:         GrCrash("GrGLVertexEffect requires GrGLFullShaderBuilder* overload for emitCode().");
michael@0:     }
michael@0: 
michael@0: private:
michael@0:     typedef GrGLEffect INHERITED;
michael@0: };
michael@0: 
michael@0: #endif