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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 GrDistanceFieldTextureEffect_DEFINED | 8 #ifndef GrDistanceFieldTextureEffect_DEFINED |
9 #define GrDistanceFieldTextureEffect_DEFINED | 9 #define GrDistanceFieldTextureEffect_DEFINED |
10 | 10 |
11 #include "GrEffect.h" | 11 #include "GrEffect.h" |
12 #include "GrVertexEffect.h" | 12 #include "GrVertexEffect.h" |
13 | 13 |
14 class GrGLDistanceFieldTextureEffect; | 14 class GrGLDistanceFieldTextureEffect; |
15 | 15 |
16 /** | 16 /** |
17 * The output color of this effect is a modulation of the input color and a samp
le from a | 17 * The output color of this effect is a modulation of the input color and a samp
le from a |
18 * distance field texture (using a smoothed step function near 0.5). | 18 * distance field texture (using a smoothed step function near 0.5). |
19 * It allows explicit specification of the filtering and wrap modes (GrTexturePa
rams). The input | 19 * It allows explicit specification of the filtering and wrap modes (GrTexturePa
rams). The input |
20 * coords are a custom attribute. | 20 * coords are a custom attribute. |
21 */ | 21 */ |
22 class GrDistanceFieldTextureEffect : public GrVertexEffect { | 22 class GrDistanceFieldTextureEffect : public GrVertexEffect { |
23 public: | 23 public: |
24 static GrEffectRef* Create(GrTexture* tex, const GrTextureParams& para, bool
uniformScale) { | 24 static GrEffectRef* Create(GrTexture* tex, const GrTextureParams& p, const S
kISize& s) { |
25 AutoEffectUnref effect(SkNEW_ARGS(GrDistanceFieldTextureEffect, (tex, pa
ra, uniformScale))); | 25 AutoEffectUnref effect(SkNEW_ARGS(GrDistanceFieldTextureEffect, (tex, p,
s))); |
26 return CreateEffectRef(effect); | 26 return CreateEffectRef(effect); |
27 } | 27 } |
28 | 28 |
29 virtual ~GrDistanceFieldTextureEffect() {} | 29 virtual ~GrDistanceFieldTextureEffect() {} |
30 | 30 |
31 static const char* Name() { return "DistanceFieldTexture"; } | 31 static const char* Name() { return "DistanceFieldTexture"; } |
32 | 32 |
33 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; | 33 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; |
34 bool isUniformScale() const { return fUniformScale; } | 34 const SkSize& getSize() const { return fSize; } |
35 | 35 |
36 typedef GrGLDistanceFieldTextureEffect GLEffect; | 36 typedef GrGLDistanceFieldTextureEffect GLEffect; |
37 | 37 |
38 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; | 38 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
39 | 39 |
40 private: | 40 private: |
41 GrDistanceFieldTextureEffect(GrTexture* texture, const GrTextureParams& para
ms, | 41 GrDistanceFieldTextureEffect(GrTexture* texture, const GrTextureParams& para
ms, |
42 bool uniformScale); | 42 const SkISize& textureSize); |
43 | 43 |
44 virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE; | 44 virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE; |
45 | 45 |
46 GrTextureAccess fTextureAccess; | 46 GrTextureAccess fTextureAccess; |
47 bool fUniformScale; | 47 SkSize fSize; |
48 | 48 |
49 GR_DECLARE_EFFECT_TEST; | 49 GR_DECLARE_EFFECT_TEST; |
50 | 50 |
51 typedef GrVertexEffect INHERITED; | 51 typedef GrVertexEffect INHERITED; |
52 }; | 52 }; |
53 | 53 |
54 #endif | 54 #endif |
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