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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 class GrGLDistanceFieldLCDTextureEffect; | 15 class GrGLDistanceFieldLCDTextureEffect; |
16 | 16 |
17 enum GrDistanceFieldEffectFlags { | |
18 kSimilarity_DistanceFieldEffectFlag = 0x01, // ctm is similarity matrix | |
19 kRectToRect_DistanceFieldEffectFlag = 0x02, // ctm maps rects to rects | |
20 kUseLCD_DistanceFieldEffectFlag = 0x04, // use lcd text | |
21 kBGR_DistanceFieldEffectFlag = 0x08, // lcd display has bgr order | |
22 kPortrait_DistanceFieldEffectFlag = 0x10, // lcd display is in portrait
mode (not used yet) | |
23 | |
24 kUniformScale_DistanceFieldEffectMask = kSimilarity_DistanceFieldEffectFlag
| | |
25 kRectToRect_DistanceFieldEffectFlag, | |
26 // The subset of the flags relevant to GrDistanceFieldTextureEffect | |
27 kNonLCD_DistanceFieldEffectMask = kSimilarity_DistanceFieldEffectFlag, | |
28 // The subset of the flags relevant to GrDistanceFieldLCDTextureEffect | |
29 kLCD_DistanceFieldEffectMask = kSimilarity_DistanceFieldEffectFlag
| | |
30 kRectToRect_DistanceFieldEffectFlag
| | |
31 kUseLCD_DistanceFieldEffectFlag | | |
32 kBGR_DistanceFieldEffectFlag, | |
33 }; | |
34 | |
35 /** | 17 /** |
36 * The output color of this effect is a modulation of the input color and a samp
le from a | 18 * The output color of this effect is a modulation of the input color and a samp
le from a |
37 * distance field texture (using a smoothed step function near 0.5). | 19 * distance field texture (using a smoothed step function near 0.5). |
38 * It allows explicit specification of the filtering and wrap modes (GrTexturePa
rams). The input | 20 * It allows explicit specification of the filtering and wrap modes (GrTexturePa
rams). The input |
39 * coords are a custom attribute. Gamma correction is handled via a texture LUT. | 21 * coords are a custom attribute. Gamma correction is handled via a texture LUT. |
40 */ | 22 */ |
41 class GrDistanceFieldTextureEffect : public GrVertexEffect { | 23 class GrDistanceFieldTextureEffect : public GrVertexEffect { |
42 public: | 24 public: |
43 #ifdef SK_GAMMA_APPLY_TO_A8 | 25 #ifdef SK_GAMMA_APPLY_TO_A8 |
44 static GrEffect* Create(GrTexture* tex, const GrTextureParams& params, | 26 static GrEffect* Create(GrTexture* tex, const GrTextureParams& params, |
45 GrTexture* gamma, const GrTextureParams& gammaParams
, float lum, | 27 GrTexture* gamma, const GrTextureParams& gammaParams
, float lum, |
46 uint32_t flags) { | 28 bool similarity) { |
47 return SkNEW_ARGS(GrDistanceFieldTextureEffect, (tex, params, gamma, gamm
aParams, lum, | 29 return SkNEW_ARGS(GrDistanceFieldTextureEffect, (tex, params, gamma, gamm
aParams, lum, |
48 flags)); | 30 similarity)); |
49 } | 31 } |
50 #else | 32 #else |
51 static GrEffect* Create(GrTexture* tex, const GrTextureParams& params, | 33 static GrEffect* Create(GrTexture* tex, const GrTextureParams& params, |
52 uint32_t flags) { | 34 bool similarity) { |
53 return SkNEW_ARGS(GrDistanceFieldTextureEffect, (tex, params, flags)); | 35 return SkNEW_ARGS(GrDistanceFieldTextureEffect, (tex, params, similarit
y)); |
54 } | 36 } |
55 #endif | 37 #endif |
56 | 38 |
57 virtual ~GrDistanceFieldTextureEffect() {} | 39 virtual ~GrDistanceFieldTextureEffect() {} |
58 | 40 |
59 static const char* Name() { return "DistanceFieldTexture"; } | 41 static const char* Name() { return "DistanceFieldTexture"; } |
60 | 42 |
61 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; | 43 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; |
62 #ifdef SK_GAMMA_APPLY_TO_A8 | 44 #ifdef SK_GAMMA_APPLY_TO_A8 |
63 float getLuminance() const { return fLuminance; } | 45 float getLuminance() const { return fLuminance; } |
64 #endif | 46 #endif |
65 uint32_t getFlags() const { return fFlags; } | 47 bool isSimilarity() const { return fIsSimilarity; } |
66 | 48 |
67 typedef GrGLDistanceFieldTextureEffect GLEffect; | 49 typedef GrGLDistanceFieldTextureEffect GLEffect; |
68 | 50 |
69 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; | 51 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
70 | 52 |
71 private: | 53 private: |
72 GrDistanceFieldTextureEffect(GrTexture* texture, const GrTextureParams& para
ms, | 54 GrDistanceFieldTextureEffect(GrTexture* texture, const GrTextureParams& para
ms, |
73 #ifdef SK_GAMMA_APPLY_TO_A8 | 55 #ifdef SK_GAMMA_APPLY_TO_A8 |
74 GrTexture* gamma, const GrTextureParams& gammaP
arams, float lum, | 56 GrTexture* gamma, const GrTextureParams& gammaP
arams, float lum, |
75 #endif | 57 #endif |
76 uint32_t flags); | 58 bool uniformScale); |
77 | 59 |
78 virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE; | 60 virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE; |
79 | 61 |
80 GrTextureAccess fTextureAccess; | 62 GrTextureAccess fTextureAccess; |
81 #ifdef SK_GAMMA_APPLY_TO_A8 | 63 #ifdef SK_GAMMA_APPLY_TO_A8 |
82 GrTextureAccess fGammaTextureAccess; | 64 GrTextureAccess fGammaTextureAccess; |
83 float fLuminance; | 65 float fLuminance; |
84 #endif | 66 #endif |
85 uint32_t fFlags; | 67 bool fIsSimilarity; |
86 | 68 |
87 GR_DECLARE_EFFECT_TEST; | 69 GR_DECLARE_EFFECT_TEST; |
88 | 70 |
89 typedef GrVertexEffect INHERITED; | 71 typedef GrVertexEffect INHERITED; |
90 }; | 72 }; |
91 | 73 |
92 /** | 74 /** |
93 * The output color of this effect is a modulation of the input color and sample
s from a | 75 * The output color of this effect is a modulation of the input color and sample
s from a |
94 * distance field texture (using a smoothed step function near 0.5), adjusted fo
r LCD displays. | 76 * distance field texture (using a smoothed step function near 0.5), adjusted fo
r LCD displays. |
95 * It allows explicit specification of the filtering and wrap modes (GrTexturePa
rams). The input | 77 * It allows explicit specification of the filtering and wrap modes (GrTexturePa
rams). The input |
96 * coords are a custom attribute. Gamma correction is handled via a texture LUT. | 78 * coords are a custom attribute. Gamma correction is handled via a texture LUT. |
97 */ | 79 */ |
98 class GrDistanceFieldLCDTextureEffect : public GrVertexEffect { | 80 class GrDistanceFieldLCDTextureEffect : public GrVertexEffect { |
99 public: | 81 public: |
100 static GrEffect* Create(GrTexture* tex, const GrTextureParams& params, | 82 static GrEffect* Create(GrTexture* tex, const GrTextureParams& params, |
101 GrTexture* gamma, const GrTextureParams& gammaParams
, | 83 GrTexture* gamma, const GrTextureParams& gammaParams
, |
102 SkColor textColor, uint32_t flags) { | 84 SkColor textColor, bool uniformScale, bool useBGR) { |
103 return SkNEW_ARGS(GrDistanceFieldLCDTextureEffect, | 85 return SkNEW_ARGS(GrDistanceFieldLCDTextureEffect, |
104 (tex, params, gamma, gammaParams, textColor, flags)); | 86 (tex, params, gamma, gammaParams, textColor, uniformSc
ale, useBGR)); |
105 } | 87 } |
106 | 88 |
107 virtual ~GrDistanceFieldLCDTextureEffect() {} | 89 virtual ~GrDistanceFieldLCDTextureEffect() {} |
108 | 90 |
109 static const char* Name() { return "DistanceFieldLCDTexture"; } | 91 static const char* Name() { return "DistanceFieldLCDTexture"; } |
110 | 92 |
111 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; | 93 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags
) const SK_OVERRIDE; |
112 GrColor getTextColor() const { return fTextColor; } | 94 GrColor getTextColor() const { return fTextColor; } |
113 uint32_t getFlags() const { return fFlags; } | 95 bool isUniformScale() const { return fUniformScale; } |
| 96 bool useBGR() const { return fUseBGR; } |
114 | 97 |
115 typedef GrGLDistanceFieldLCDTextureEffect GLEffect; | 98 typedef GrGLDistanceFieldLCDTextureEffect GLEffect; |
116 | 99 |
117 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; | 100 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
118 | 101 |
119 private: | 102 private: |
120 GrDistanceFieldLCDTextureEffect(GrTexture* texture, const GrTextureParams& p
arams, | 103 GrDistanceFieldLCDTextureEffect(GrTexture* texture, const GrTextureParams& p
arams, |
121 GrTexture* gamma, const GrTextureParams& gam
maParams, | 104 GrTexture* gamma, const GrTextureParams& gam
maParams, |
122 SkColor textColor, | 105 SkColor textColor, |
123 uint32_t flags); | 106 bool uniformScale, bool useBGR); |
124 | 107 |
125 virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE; | 108 virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE; |
126 | 109 |
127 GrTextureAccess fTextureAccess; | 110 GrTextureAccess fTextureAccess; |
128 GrTextureAccess fGammaTextureAccess; | 111 GrTextureAccess fGammaTextureAccess; |
129 GrColor fTextColor; | 112 GrColor fTextColor; |
130 uint32_t fFlags; | 113 bool fUniformScale; |
| 114 bool fUseBGR; |
131 | 115 |
132 GR_DECLARE_EFFECT_TEST; | 116 GR_DECLARE_EFFECT_TEST; |
133 | 117 |
134 typedef GrVertexEffect INHERITED; | 118 typedef GrVertexEffect INHERITED; |
135 }; | 119 }; |
136 | 120 |
137 #endif | 121 #endif |
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