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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2011 Google Inc. | 3 * Copyright 2011 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef GrPaint_DEFINED | 10 #ifndef GrPaint_DEFINED |
11 #define GrPaint_DEFINED | 11 #define GrPaint_DEFINED |
12 | 12 |
13 #include "GrColor.h" | 13 #include "GrColor.h" |
14 #include "GrFragmentStage.h" | 14 #include "GrFragmentStage.h" |
15 #include "GrXferProcessor.h" | 15 #include "GrXferProcessor.h" |
16 #include "effects/GrPorterDuffXferProcessor.h" | |
17 | 16 |
18 #include "SkXfermode.h" | 17 #include "SkXfermode.h" |
19 | 18 |
20 /** | 19 /** |
21 * The paint describes how color and coverage are computed at each pixel by GrCo
ntext draw | 20 * The paint describes how color and coverage are computed at each pixel by GrCo
ntext draw |
22 * functions and the how color is blended with the destination pixel. | 21 * functions and the how color is blended with the destination pixel. |
23 * | 22 * |
24 * The paint allows installation of custom color and coverage stages. New types
of stages are | 23 * The paint allows installation of custom color and coverage stages. New types
of stages are |
25 * created by subclassing GrProcessor. | 24 * created by subclassing GrProcessor. |
26 * | 25 * |
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45 */ | 44 */ |
46 class GrPaint { | 45 class GrPaint { |
47 public: | 46 public: |
48 GrPaint() { this->reset(); } | 47 GrPaint() { this->reset(); } |
49 | 48 |
50 GrPaint(const GrPaint& paint) { *this = paint; } | 49 GrPaint(const GrPaint& paint) { *this = paint; } |
51 | 50 |
52 ~GrPaint() {} | 51 ~GrPaint() {} |
53 | 52 |
54 /** | 53 /** |
| 54 * Sets the blending coefficients to use to blend the final primitive color
with the |
| 55 * destination color. Defaults to kOne for src and kZero for dst (i.e. src m
ode). |
| 56 */ |
| 57 void setBlendFunc(GrBlendCoeff srcCoeff, GrBlendCoeff dstCoeff) { |
| 58 fSrcBlendCoeff = srcCoeff; |
| 59 fDstBlendCoeff = dstCoeff; |
| 60 } |
| 61 GrBlendCoeff getSrcBlendCoeff() const { return fSrcBlendCoeff; } |
| 62 GrBlendCoeff getDstBlendCoeff() const { return fDstBlendCoeff; } |
| 63 |
| 64 /** |
55 * The initial color of the drawn primitive. Defaults to solid white. | 65 * The initial color of the drawn primitive. Defaults to solid white. |
56 */ | 66 */ |
57 void setColor(GrColor color) { fColor = color; } | 67 void setColor(GrColor color) { fColor = color; } |
58 GrColor getColor() const { return fColor; } | 68 GrColor getColor() const { return fColor; } |
59 | 69 |
60 /** | 70 /** |
61 * Should primitives be anti-aliased or not. Defaults to false. | 71 * Should primitives be anti-aliased or not. Defaults to false. |
62 */ | 72 */ |
63 void setAntiAlias(bool aa) { fAntiAlias = aa; } | 73 void setAntiAlias(bool aa) { fAntiAlias = aa; } |
64 bool isAntiAlias() const { return fAntiAlias; } | 74 bool isAntiAlias() const { return fAntiAlias; } |
65 | 75 |
66 /** | 76 /** |
67 * Should dithering be applied. Defaults to false. | 77 * Should dithering be applied. Defaults to false. |
68 */ | 78 */ |
69 void setDither(bool dither) { fDither = dither; } | 79 void setDither(bool dither) { fDither = dither; } |
70 bool isDither() const { return fDither; } | 80 bool isDither() const { return fDither; } |
71 | 81 |
72 const GrXPFactory* setXPFactory(const GrXPFactory* xpFactory) { | 82 const GrXPFactory* setXPFactory(const GrXPFactory* xpFactory) { |
73 fXPFactory.reset(SkRef(xpFactory)); | 83 fXPFactory.reset(SkRef(xpFactory)); |
74 return xpFactory; | 84 return xpFactory; |
75 } | 85 } |
76 | 86 |
77 void setPorterDuffXPFactory(SkXfermode::Mode mode) { | |
78 fXPFactory.reset(GrPorterDuffXPFactory::Create(mode)); | |
79 } | |
80 | |
81 void setPorterDuffXPFactory(GrBlendCoeff src, GrBlendCoeff dst) { | |
82 fXPFactory.reset(GrPorterDuffXPFactory::Create(src, dst)); | |
83 } | |
84 | |
85 /** | 87 /** |
86 * Appends an additional color processor to the color computation. | 88 * Appends an additional color processor to the color computation. |
87 */ | 89 */ |
88 const GrFragmentProcessor* addColorProcessor(const GrFragmentProcessor* fp)
{ | 90 const GrFragmentProcessor* addColorProcessor(const GrFragmentProcessor* fp)
{ |
89 SkASSERT(fp); | 91 SkASSERT(fp); |
90 SkNEW_APPEND_TO_TARRAY(&fColorStages, GrFragmentStage, (fp)); | 92 SkNEW_APPEND_TO_TARRAY(&fColorStages, GrFragmentStage, (fp)); |
91 return fp; | 93 return fp; |
92 } | 94 } |
93 | 95 |
94 /** | 96 /** |
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112 int numColorStages() const { return fColorStages.count(); } | 114 int numColorStages() const { return fColorStages.count(); } |
113 int numCoverageStages() const { return fCoverageStages.count(); } | 115 int numCoverageStages() const { return fCoverageStages.count(); } |
114 int numTotalStages() const { return this->numColorStages() + this->numCovera
geStages(); } | 116 int numTotalStages() const { return this->numColorStages() + this->numCovera
geStages(); } |
115 | 117 |
116 const GrXPFactory* getXPFactory() const { return fXPFactory.get(); } | 118 const GrXPFactory* getXPFactory() const { return fXPFactory.get(); } |
117 | 119 |
118 const GrFragmentStage& getColorStage(int s) const { return fColorStages[s];
} | 120 const GrFragmentStage& getColorStage(int s) const { return fColorStages[s];
} |
119 const GrFragmentStage& getCoverageStage(int s) const { return fCoverageStage
s[s]; } | 121 const GrFragmentStage& getCoverageStage(int s) const { return fCoverageStage
s[s]; } |
120 | 122 |
121 GrPaint& operator=(const GrPaint& paint) { | 123 GrPaint& operator=(const GrPaint& paint) { |
| 124 fSrcBlendCoeff = paint.fSrcBlendCoeff; |
| 125 fDstBlendCoeff = paint.fDstBlendCoeff; |
122 fAntiAlias = paint.fAntiAlias; | 126 fAntiAlias = paint.fAntiAlias; |
123 fDither = paint.fDither; | 127 fDither = paint.fDither; |
124 | 128 |
125 fColor = paint.fColor; | 129 fColor = paint.fColor; |
126 | 130 |
127 fColorStages = paint.fColorStages; | 131 fColorStages = paint.fColorStages; |
128 fCoverageStages = paint.fCoverageStages; | 132 fCoverageStages = paint.fCoverageStages; |
129 | 133 |
130 fXPFactory.reset(SkRef(paint.getXPFactory())); | 134 fXPFactory.reset(SkRef(paint.getXPFactory())); |
131 | 135 |
132 return *this; | 136 return *this; |
133 } | 137 } |
134 | 138 |
135 /** | 139 /** |
136 * Resets the paint to the defaults. | 140 * Resets the paint to the defaults. |
137 */ | 141 */ |
138 void reset() { | 142 void reset() { |
| 143 this->resetBlend(); |
139 this->resetOptions(); | 144 this->resetOptions(); |
140 this->resetColor(); | 145 this->resetColor(); |
141 this->resetStages(); | 146 this->resetStages(); |
142 } | 147 } |
143 | 148 |
144 /** | 149 /** |
145 * Determines whether the drawing with this paint is opaque with respect to
both color blending | 150 * Determines whether the drawing with this paint is opaque with respect to
both color blending |
146 * and fractional coverage. It does not consider whether AA has been enabled
on the paint or | 151 * and fractional coverage. It does not consider whether AA has been enabled
on the paint or |
147 * not. Depending upon whether multisampling or coverage-based AA is in use,
AA may make the | 152 * not. Depending upon whether multisampling or coverage-based AA is in use,
AA may make the |
148 * result only apply to the interior of primitives. | 153 * result only apply to the interior of primitives. |
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199 return true; | 204 return true; |
200 } | 205 } |
201 | 206 |
202 friend class GrContext; // To access above two functions | 207 friend class GrContext; // To access above two functions |
203 friend class GrStencilAndCoverTextContext; // To access above two functions | 208 friend class GrStencilAndCoverTextContext; // To access above two functions |
204 | 209 |
205 SkAutoTUnref<const GrXPFactory> fXPFactory; | 210 SkAutoTUnref<const GrXPFactory> fXPFactory; |
206 SkSTArray<4, GrFragmentStage> fColorStages; | 211 SkSTArray<4, GrFragmentStage> fColorStages; |
207 SkSTArray<2, GrFragmentStage> fCoverageStages; | 212 SkSTArray<2, GrFragmentStage> fCoverageStages; |
208 | 213 |
| 214 GrBlendCoeff fSrcBlendCoeff; |
| 215 GrBlendCoeff fDstBlendCoeff; |
209 bool fAntiAlias; | 216 bool fAntiAlias; |
210 bool fDither; | 217 bool fDither; |
211 | 218 |
212 GrColor fColor; | 219 GrColor fColor; |
213 | 220 |
| 221 void resetBlend() { |
| 222 fSrcBlendCoeff = kOne_GrBlendCoeff; |
| 223 fDstBlendCoeff = kZero_GrBlendCoeff; |
| 224 } |
| 225 |
214 void resetOptions() { | 226 void resetOptions() { |
215 fAntiAlias = false; | 227 fAntiAlias = false; |
216 fDither = false; | 228 fDither = false; |
217 } | 229 } |
218 | 230 |
219 void resetColor() { | 231 void resetColor() { |
220 fColor = GrColorPackRGBA(0xff, 0xff, 0xff, 0xff); | 232 fColor = GrColorPackRGBA(0xff, 0xff, 0xff, 0xff); |
221 } | 233 } |
222 | 234 |
223 void resetStages(); | 235 void resetStages(); |
224 }; | 236 }; |
225 | 237 |
226 #endif | 238 #endif |
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