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comparison: gfx/skia/trunk/src/gpu/effects/Gr1DKernelEffect.h
gfx/skia/trunk/src/gpu/effects/Gr1DKernelEffect.h
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- TOR_BUG_9701
- changeset 11
- deefc01c0e14
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| -1:000000000000 | 0:ff034857a274 |
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| 1 /* | |
| 2 * Copyright 2012 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #ifndef Gr1DKernelEffect_DEFINED | |
| 9 #define Gr1DKernelEffect_DEFINED | |
| 10 | |
| 11 #include "GrSingleTextureEffect.h" | |
| 12 #include "SkMatrix.h" | |
| 13 | |
| 14 /** | |
| 15 * Base class for 1D kernel effects. The kernel operates either in X or Y and | |
| 16 * has a pixel radius. The kernel is specified in the src texture's space | |
| 17 * and the kernel center is pinned to a texel's center. The radius specifies | |
| 18 * the number of texels on either side of the center texel in X or Y that are | |
| 19 * read. Since the center pixel is also read, the total width is one larger than | |
| 20 * two times the radius. | |
| 21 */ | |
| 22 | |
| 23 class Gr1DKernelEffect : public GrSingleTextureEffect { | |
| 24 | |
| 25 public: | |
| 26 enum Direction { | |
| 27 kX_Direction, | |
| 28 kY_Direction, | |
| 29 }; | |
| 30 | |
| 31 Gr1DKernelEffect(GrTexture* texture, | |
| 32 Direction direction, | |
| 33 int radius) | |
| 34 : GrSingleTextureEffect(texture, MakeDivByTextureWHMatrix(texture)) | |
| 35 , fDirection(direction) | |
| 36 , fRadius(radius) {} | |
| 37 | |
| 38 virtual ~Gr1DKernelEffect() {}; | |
| 39 | |
| 40 static int WidthFromRadius(int radius) { return 2 * radius + 1; } | |
| 41 | |
| 42 int radius() const { return fRadius; } | |
| 43 int width() const { return WidthFromRadius(fRadius); } | |
| 44 Direction direction() const { return fDirection; } | |
| 45 | |
| 46 private: | |
| 47 | |
| 48 Direction fDirection; | |
| 49 int fRadius; | |
| 50 | |
| 51 typedef GrSingleTextureEffect INHERITED; | |
| 52 }; | |
| 53 | |
| 54 #endif |
