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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
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 SkShader_DEFINED | 8 #ifndef SkShader_DEFINED |
9 #define SkShader_DEFINED | 9 #define SkShader_DEFINED |
10 | 10 |
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142 */ | 142 */ |
143 virtual uint8_t getSpan16Alpha() const { return fPaintAlpha; } | 143 virtual uint8_t getSpan16Alpha() const { return fPaintAlpha; } |
144 | 144 |
145 /** | 145 /** |
146 * Called for each span of the object being drawn. Your subclass should | 146 * Called for each span of the object being drawn. Your subclass should |
147 * set the appropriate colors (with premultiplied alpha) that correspon
d | 147 * set the appropriate colors (with premultiplied alpha) that correspon
d |
148 * to the specified device coordinates. | 148 * to the specified device coordinates. |
149 */ | 149 */ |
150 virtual void shadeSpan(int x, int y, SkPMColor[], int count) = 0; | 150 virtual void shadeSpan(int x, int y, SkPMColor[], int count) = 0; |
151 | 151 |
152 /** | 152 typedef void (*ShadeProc)(void* ctx, int x, int y, SkPMColor[], int coun
t); |
153 * The const void* ctx is only const because all the implementations are
const. | |
154 * This can be changed to non-const if a new shade proc needs to change
the ctx. | |
155 */ | |
156 typedef void (*ShadeProc)(const void* ctx, int x, int y, SkPMColor[], in
t count); | |
157 virtual ShadeProc asAShadeProc(void** ctx); | 153 virtual ShadeProc asAShadeProc(void** ctx); |
158 | 154 |
159 /** | 155 /** |
160 * Called only for 16bit devices when getFlags() returns | 156 * Called only for 16bit devices when getFlags() returns |
161 * kOpaqueAlphaFlag | kHasSpan16_Flag | 157 * kOpaqueAlphaFlag | kHasSpan16_Flag |
162 */ | 158 */ |
163 virtual void shadeSpan16(int x, int y, uint16_t[], int count); | 159 virtual void shadeSpan16(int x, int y, uint16_t[], int count); |
164 | 160 |
165 /** | 161 /** |
166 * Similar to shadeSpan, but only returns the alpha-channel for a span. | 162 * Similar to shadeSpan, but only returns the alpha-channel for a span. |
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443 SkMatrix fLocalMatrix; | 439 SkMatrix fLocalMatrix; |
444 | 440 |
445 // So the SkLocalMatrixShader can whack fLocalMatrix in its SkReadBuffer con
structor. | 441 // So the SkLocalMatrixShader can whack fLocalMatrix in its SkReadBuffer con
structor. |
446 friend class SkLocalMatrixShader; | 442 friend class SkLocalMatrixShader; |
447 friend class SkBitmapProcShader; // for computeTotalInverse() | 443 friend class SkBitmapProcShader; // for computeTotalInverse() |
448 | 444 |
449 typedef SkFlattenable INHERITED; | 445 typedef SkFlattenable INHERITED; |
450 }; | 446 }; |
451 | 447 |
452 #endif | 448 #endif |
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