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1 /* |
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2 * Copyright 2013 Google Inc. |
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3 * |
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4 * Use of this source code is governed by a BSD-style license that can be |
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5 * found in the LICENSE file. |
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6 */ |
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7 |
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8 #ifndef GrVertexEffect_DEFINED |
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9 #define GrVertexEffect_DEFINED |
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10 |
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11 #include "GrEffect.h" |
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12 |
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13 /** |
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14 * If an effect needs specialized vertex shader code, then it must inherit from this class. |
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15 * Otherwise it won't be able to add vertex attribs, and it might be given a vertexless shader |
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16 * program in emitCode. |
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17 */ |
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18 class GrVertexEffect : public GrEffect { |
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19 public: |
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20 GrVertexEffect() { fHasVertexCode = true; } |
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21 |
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22 protected: |
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23 /** |
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24 * Subclasses call this from their constructor to register vertex attributes (at most |
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25 * kMaxVertexAttribs). This must only be called from the constructor because GrEffects are |
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26 * immutable. |
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27 */ |
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28 void addVertexAttrib(GrSLType type) { |
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29 SkASSERT(fVertexAttribTypes.count() < kMaxVertexAttribs); |
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30 fVertexAttribTypes.push_back(type); |
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31 } |
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32 |
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33 private: |
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34 typedef GrEffect INHERITED; |
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35 }; |
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36 |
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37 #endif |