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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 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 SkImageFilter_DEFINED | 8 #ifndef SkImageFilter_DEFINED |
9 #define SkImageFilter_DEFINED | 9 #define SkImageFilter_DEFINED |
10 | 10 |
11 #include "../private/SkTemplates.h" | 11 #include "../private/SkTemplates.h" |
12 #include "SkFilterQuality.h" | 12 #include "SkFilterQuality.h" |
13 #include "SkFlattenable.h" | 13 #include "SkFlattenable.h" |
14 #include "SkMatrix.h" | 14 #include "SkMatrix.h" |
15 #include "SkRect.h" | 15 #include "SkRect.h" |
16 #include "SkSurfaceProps.h" | 16 #include "SkSurfaceProps.h" |
17 | 17 |
18 class GrFragmentProcessor; | 18 class GrFragmentProcessor; |
19 class GrProcessorDataManager; | |
20 class GrTexture; | 19 class GrTexture; |
21 class SkBaseDevice; | 20 class SkBaseDevice; |
22 class SkBitmap; | 21 class SkBitmap; |
23 class SkColorFilter; | 22 class SkColorFilter; |
24 struct SkIPoint; | 23 struct SkIPoint; |
25 | 24 |
26 /** | 25 /** |
27 * Base class for image filters. If one is installed in the paint, then | 26 * Base class for image filters. If one is installed in the paint, then |
28 * all drawing occurs as usual, but it is as if the drawing happened into an | 27 * all drawing occurs as usual, but it is as if the drawing happened into an |
29 * offscreen (before the xfermode is applied). This offscreen bitmap will | 28 * offscreen (before the xfermode is applied). This offscreen bitmap will |
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356 * If effect is non-NULL, a new GrProcessor instance is stored | 355 * If effect is non-NULL, a new GrProcessor instance is stored |
357 * in it. The caller assumes ownership of the stage, and it is up to the | 356 * in it. The caller assumes ownership of the stage, and it is up to the |
358 * caller to unref it. | 357 * caller to unref it. |
359 * | 358 * |
360 * The effect can assume its vertexCoords space maps 1-to-1 with texels | 359 * The effect can assume its vertexCoords space maps 1-to-1 with texels |
361 * in the texture. "matrix" is a transformation to apply to filter | 360 * in the texture. "matrix" is a transformation to apply to filter |
362 * parameters before they are used in the effect. Note that this function | 361 * parameters before they are used in the effect. Note that this function |
363 * will be called with (NULL, NULL, SkMatrix::I()) to query for support, | 362 * will be called with (NULL, NULL, SkMatrix::I()) to query for support, |
364 * so returning "true" indicates support for all possible matrices. | 363 * so returning "true" indicates support for all possible matrices. |
365 */ | 364 */ |
366 virtual bool asFragmentProcessor(GrFragmentProcessor**, GrProcessorDataManag
er*, GrTexture*, | 365 virtual bool asFragmentProcessor(GrFragmentProcessor**, GrTexture*, const Sk
Matrix&, |
367 const SkMatrix&, const SkIRect& bounds) con
st; | 366 const SkIRect& bounds) const; |
368 | 367 |
369 /** | 368 /** |
370 * Returns true if this filter can cause transparent black pixels to become | 369 * Returns true if this filter can cause transparent black pixels to become |
371 * visible (ie., alpha > 0). The default implementation returns false. This | 370 * visible (ie., alpha > 0). The default implementation returns false. This |
372 * function is non-recursive, i.e., only queries this filter and not its | 371 * function is non-recursive, i.e., only queries this filter and not its |
373 * inputs. | 372 * inputs. |
374 */ | 373 */ |
375 virtual bool affectsTransparentBlack() const; | 374 virtual bool affectsTransparentBlack() const; |
376 | 375 |
377 private: | 376 private: |
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393 */ | 392 */ |
394 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount) \ | 393 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount) \ |
395 Common localVar; \ | 394 Common localVar; \ |
396 do { \ | 395 do { \ |
397 if (!localVar.unflatten(buffer, expectedCount)) { \ | 396 if (!localVar.unflatten(buffer, expectedCount)) { \ |
398 return NULL; \ | 397 return NULL; \ |
399 } \ | 398 } \ |
400 } while (0) | 399 } while (0) |
401 | 400 |
402 #endif | 401 #endif |
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