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| 1 /* | |
| 2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> | |
| 3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org> | |
| 4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org> | |
| 5 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 6 * | |
| 7 * This library is free software; you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Library General Public | |
| 9 * License as published by the Free Software Foundation; either | |
| 10 * version 2 of the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This library is distributed in the hope that it will be useful, | |
| 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Library General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Library General Public License | |
| 18 * along with this library; see the file COPYING.LIB. If not, write to | |
| 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 20 * Boston, MA 02110-1301, USA. | |
| 21 */ | |
| 22 | |
| 23 #ifndef FEGaussianBlur_h | |
| 24 #define FEGaussianBlur_h | |
| 25 | |
| 26 #include "core/platform/graphics/filters/Filter.h" | |
| 27 #include "core/platform/graphics/filters/FilterEffect.h" | |
| 28 | |
| 29 namespace WebCore { | |
| 30 | |
| 31 class FEGaussianBlur : public FilterEffect { | |
| 32 public: | |
| 33 static PassRefPtr<FEGaussianBlur> create(Filter*, float, float); | |
| 34 | |
| 35 float stdDeviationX() const; | |
| 36 void setStdDeviationX(float); | |
| 37 | |
| 38 float stdDeviationY() const; | |
| 39 void setStdDeviationY(float); | |
| 40 | |
| 41 static float calculateStdDeviation(float); | |
| 42 | |
| 43 virtual void determineAbsolutePaintRect(); | |
| 44 virtual FloatRect mapRect(const FloatRect&, bool forward = true) OVERRIDE FI
NAL; | |
| 45 static void calculateKernelSize(Filter*, unsigned& kernelSizeX, unsigned& ke
rnelSizeY, float stdX, float stdY); | |
| 46 static void calculateUnscaledKernelSize(unsigned& kernelSizeX, unsigned& ker
nelSizeY, float stdX, float stdY); | |
| 47 | |
| 48 virtual TextStream& externalRepresentation(TextStream&, int indention) const
; | |
| 49 | |
| 50 private: | |
| 51 static const int s_minimalRectDimension = 100 * 100; // Empirical data limit
for parallel jobs | |
| 52 | |
| 53 template<typename Type> | |
| 54 friend class ParallelJobs; | |
| 55 | |
| 56 struct PlatformApplyParameters { | |
| 57 FEGaussianBlur* filter; | |
| 58 RefPtr<Uint8ClampedArray> srcPixelArray; | |
| 59 RefPtr<Uint8ClampedArray> dstPixelArray; | |
| 60 int width; | |
| 61 int height; | |
| 62 unsigned kernelSizeX; | |
| 63 unsigned kernelSizeY; | |
| 64 }; | |
| 65 | |
| 66 static void platformApplyWorker(PlatformApplyParameters*); | |
| 67 | |
| 68 FEGaussianBlur(Filter*, float, float); | |
| 69 | |
| 70 virtual void applySoftware() OVERRIDE; | |
| 71 virtual bool applySkia() OVERRIDE; | |
| 72 | |
| 73 static inline void kernelPosition(int boxBlur, unsigned& std, int& dLeft, in
t& dRight); | |
| 74 inline void platformApply(Uint8ClampedArray* srcPixelArray, Uint8ClampedArra
y* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize
); | |
| 75 | |
| 76 inline void platformApplyGeneric(Uint8ClampedArray* srcPixelArray, Uint8Clam
pedArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& pa
intSize); | |
| 77 virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*)
OVERRIDE; | |
| 78 | |
| 79 float m_stdX; | |
| 80 float m_stdY; | |
| 81 }; | |
| 82 | |
| 83 inline void FEGaussianBlur::kernelPosition(int boxBlur, unsigned& std, int& dLef
t, int& dRight) | |
| 84 { | |
| 85 // check http://www.w3.org/TR/SVG/filters.html#feGaussianBlurElement for det
ails | |
| 86 switch (boxBlur) { | |
| 87 case 0: | |
| 88 if (!(std % 2)) { | |
| 89 dLeft = std / 2 - 1; | |
| 90 dRight = std - dLeft; | |
| 91 } else { | |
| 92 dLeft = std / 2; | |
| 93 dRight = std - dLeft; | |
| 94 } | |
| 95 break; | |
| 96 case 1: | |
| 97 if (!(std % 2)) { | |
| 98 dLeft++; | |
| 99 dRight--; | |
| 100 } | |
| 101 break; | |
| 102 case 2: | |
| 103 if (!(std % 2)) { | |
| 104 dRight++; | |
| 105 std++; | |
| 106 } | |
| 107 break; | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 } // namespace WebCore | |
| 112 | |
| 113 #endif // FEGaussianBlur_h | |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk