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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrTextureDomainEffect_DEFINED | 8 #ifndef GrTextureDomainEffect_DEFINED |
9 #define GrTextureDomainEffect_DEFINED | 9 #define GrTextureDomainEffect_DEFINED |
10 | 10 |
11 #include "GrSingleTextureEffect.h" | 11 #include "GrSingleTextureEffect.h" |
12 #include "gl/GrGLEffect.h" | 12 #include "gl/GrGLEffect.h" |
13 | 13 |
14 class GrGLShaderBuilder; | 14 class GrGLShaderBuilder; |
15 struct SkRect; | 15 struct SkRect; |
16 | 16 |
17 /** | 17 /** |
18 * Limits a texture's lookup coordinates to a domain. Samples outside the domain are either clamped | 18 * Limits a texture's lookup coordinates to a domain. Samples outside the domain are either clamped |
19 * the edge of the domain or result in a vec4 of zeros (decal mode). The domain is clipped to | 19 * the edge of the domain or result in a vec4 of zeros (decal mode). The domain is clipped to |
20 * normalized texture coords ([0,1]x[0,1] square). Bilinear filtering can cause texels outside the | 20 * normalized texture coords ([0,1]x[0,1] square). Bilinear filtering can cause texels outside the |
21 * domain to affect the read value unless the caller considers this when calcula ting the domain. | 21 * domain to affect the read value unless the caller considers this when calcula ting the domain. |
22 */ | 22 */ |
23 class GrTextureDomain { | 23 class GrTextureDomain { |
24 public: | 24 public: |
25 enum Mode { | 25 enum Mode { |
26 kIgnore_Mode, // Ignore the texture domain rectangle. | 26 kIgnore_Mode, // Ignore the texture domain rectangle. |
27 kClamp_Mode, // Clamp texture coords to the domain rectangle. | 27 kClamp_Mode, // Clamp texture coords to the domain rectangle. |
28 kDecal_Mode, // Treat the area outside the domain rectangle as fully t ransparent. | 28 kDecal_Mode, // Treat the area outside the domain rectangle as fully t ransparent. |
29 kRepeat_Mode, // Wrap texture coordinates. NOTE: filtering may not wor k as expected | |
Stephen White
2014/07/29 14:51:16
This comment is a little cryptic. You mean due to
bsalomon
2014/07/29 14:55:27
It's not related to NPOT. Using MIP or Bilerp filt
| |
29 | 30 |
30 kLastMode = kDecal_Mode | 31 kLastMode = kRepeat_Mode |
31 }; | 32 }; |
32 static const int kModeCount = kLastMode + 1; | 33 static const int kModeCount = kLastMode + 1; |
33 | 34 |
34 static const GrTextureDomain& IgnoredDomain() { | 35 static const GrTextureDomain& IgnoredDomain() { |
35 static const SkRect gDummyRect = {0, 0, 0, 0}; | 36 static const SkRect gDummyRect = {0, 0, 0, 0}; |
36 static const GrTextureDomain gDomain(gDummyRect, kIgnore_Mode); | 37 static const GrTextureDomain gDomain(gDummyRect, kIgnore_Mode); |
37 return gDomain; | 38 return gDomain; |
38 } | 39 } |
39 | 40 |
40 /** | 41 /** |
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166 GrCoordSet); | 167 GrCoordSet); |
167 | 168 |
168 virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; | 169 virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; |
169 | 170 |
170 GR_DECLARE_EFFECT_TEST; | 171 GR_DECLARE_EFFECT_TEST; |
171 | 172 |
172 typedef GrSingleTextureEffect INHERITED; | 173 typedef GrSingleTextureEffect INHERITED; |
173 }; | 174 }; |
174 | 175 |
175 #endif | 176 #endif |
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