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Side by Side Diff: include/core/SkShader.h

Issue 1228683002: rename GrShaderDataManager -> GrProcessorDataManager (Closed) Base URL: https://skia.googlesource.com/skia.git@grfixuptests
Patch Set: rebase onto origin/master Created 5 years, 5 months ago
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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
11 #include "SkBitmap.h" 11 #include "SkBitmap.h"
12 #include "SkFlattenable.h" 12 #include "SkFlattenable.h"
13 #include "SkMask.h" 13 #include "SkMask.h"
14 #include "SkMatrix.h" 14 #include "SkMatrix.h"
15 #include "SkPaint.h" 15 #include "SkPaint.h"
16 #include "../gpu/GrColor.h" 16 #include "../gpu/GrColor.h"
17 17
18 class SkPath; 18 class SkPath;
19 class SkPicture; 19 class SkPicture;
20 class SkXfermode; 20 class SkXfermode;
21 class GrContext; 21 class GrContext;
22 class GrFragmentProcessor; 22 class GrFragmentProcessor;
23 class GrShaderDataManager; 23 class GrProcessorDataManager;
24 24
25 /** \class SkShader 25 /** \class SkShader
26 * 26 *
27 * Shaders specify the source color(s) for what is being drawn. If a paint 27 * Shaders specify the source color(s) for what is being drawn. If a paint
28 * has no shader, then the paint's color is used. If the paint has a 28 * has no shader, then the paint's color is used. If the paint has a
29 * shader, then the shader's color(s) are use instead, but they are 29 * shader, then the shader's color(s) are use instead, but they are
30 * modulated by the paint's alpha. This makes it easy to create a shader 30 * modulated by the paint's alpha. This makes it easy to create a shader
31 * once (e.g. bitmap tiling or gradient) and then change its transparency 31 * once (e.g. bitmap tiling or gradient) and then change its transparency
32 * w/o having to modify the original shader... only the paint's alpha needs 32 * w/o having to modify the original shader... only the paint's alpha needs
33 * to be modified. 33 * to be modified.
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358 * the paint's color as then many GPU shaders may be generated. 358 * the paint's color as then many GPU shaders may be generated.
359 * 359 *
360 * The GrContext may be used by the effect to create textures. The GPU devi ce does not 360 * The GrContext may be used by the effect to create textures. The GPU devi ce does not
361 * call createContext. Instead we pass the SkPaint here in case the shader needs paint info. 361 * call createContext. Instead we pass the SkPaint here in case the shader needs paint info.
362 * 362 *
363 * A view matrix is always required to create the correct GrFragmentProcess or. Some shaders 363 * A view matrix is always required to create the correct GrFragmentProcess or. Some shaders
364 * may also use the optional localMatrix to define a matrix relevant only f or sampling. 364 * may also use the optional localMatrix to define a matrix relevant only f or sampling.
365 */ 365 */
366 virtual bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix& viewM, 366 virtual bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix& viewM,
367 const SkMatrix* localMatrix, GrColor*, 367 const SkMatrix* localMatrix, GrColor*,
368 GrShaderDataManager*, GrFragmentProcessor** ) const; 368 GrProcessorDataManager*, GrFragmentProcesso r**) const;
369 369
370 /** 370 /**
371 * If the shader can represent its "average" luminance in a single color, r eturn true and 371 * If the shader can represent its "average" luminance in a single color, r eturn true and
372 * if color is not NULL, return that color. If it cannot, return false and ignore the color 372 * if color is not NULL, return that color. If it cannot, return false and ignore the color
373 * parameter. 373 * parameter.
374 * 374 *
375 * Note: if this returns true, the returned color will always be opaque, as only the RGB 375 * Note: if this returns true, the returned color will always be opaque, as only the RGB
376 * components are used to compute luminance. 376 * components are used to compute luminance.
377 */ 377 */
378 bool asLuminanceColor(SkColor*) const; 378 bool asLuminanceColor(SkColor*) const;
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475 // constructors. 475 // constructors.
476 SkMatrix fLocalMatrix; 476 SkMatrix fLocalMatrix;
477 477
478 // So the SkLocalMatrixShader can whack fLocalMatrix in its SkReadBuffer con structor. 478 // So the SkLocalMatrixShader can whack fLocalMatrix in its SkReadBuffer con structor.
479 friend class SkLocalMatrixShader; 479 friend class SkLocalMatrixShader;
480 480
481 typedef SkFlattenable INHERITED; 481 typedef SkFlattenable INHERITED;
482 }; 482 };
483 483
484 #endif 484 #endif
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