1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/effects/GrVertexEffect.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,37 @@
1.4 +/*
1.5 + * Copyright 2013 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef GrVertexEffect_DEFINED
1.12 +#define GrVertexEffect_DEFINED
1.13 +
1.14 +#include "GrEffect.h"
1.15 +
1.16 +/**
1.17 + * If an effect needs specialized vertex shader code, then it must inherit from this class.
1.18 + * Otherwise it won't be able to add vertex attribs, and it might be given a vertexless shader
1.19 + * program in emitCode.
1.20 + */
1.21 +class GrVertexEffect : public GrEffect {
1.22 +public:
1.23 + GrVertexEffect() { fHasVertexCode = true; }
1.24 +
1.25 +protected:
1.26 + /**
1.27 + * Subclasses call this from their constructor to register vertex attributes (at most
1.28 + * kMaxVertexAttribs). This must only be called from the constructor because GrEffects are
1.29 + * immutable.
1.30 + */
1.31 + void addVertexAttrib(GrSLType type) {
1.32 + SkASSERT(fVertexAttribTypes.count() < kMaxVertexAttribs);
1.33 + fVertexAttribTypes.push_back(type);
1.34 + }
1.35 +
1.36 +private:
1.37 + typedef GrEffect INHERITED;
1.38 +};
1.39 +
1.40 +#endif
