gfx/skia/trunk/src/gpu/effects/GrVertexEffect.h

branch
TOR_BUG_9701
changeset 15
b8a032363ba2
equal deleted inserted replaced
-1:000000000000 0:2fa707e3ba6a
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

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