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>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
22 #ifndef FEGaussianBlur_h
23 #define FEGaussianBlur_h
26 #include "FilterEffect.h"
31 class FEGaussianBlur : public FilterEffect {
33 static PassRefPtr<FEGaussianBlur> create(Filter*, float, float);
35 float stdDeviationX() const;
36 void setStdDeviationX(float);
38 float stdDeviationY() const;
39 void setStdDeviationY(float);
41 static float calculateStdDeviation(float);
46 virtual void determineAbsolutePaintRect();
47 static void calculateKernelSize(Filter*, unsigned& kernelSizeX, unsigned& kernelSizeY, float stdX, float stdY);
49 virtual TextStream& externalRepresentation(TextStream&, int indention) const;
52 #if ENABLE(PARALLEL_JOBS)
53 static const int s_minimalRectDimension = 100 * 100; // Empirical data limit for parallel jobs
55 template<typename Type>
56 friend class ParallelJobs;
58 struct PlatformApplyParameters {
59 FEGaussianBlur* filter;
60 RefPtr<ByteArray> srcPixelArray;
61 RefPtr<ByteArray> dstPixelArray;
68 static void platformApplyWorker(PlatformApplyParameters*);
69 #endif // ENABLE(PARALLEL_JOBS)
71 FEGaussianBlur(Filter*, float, float);
73 static inline void kernelPosition(int boxBlur, unsigned& std, int& dLeft, int& dRight);
74 inline void platformApply(ByteArray* srcPixelArray, ByteArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize);
76 inline void platformApplyGeneric(ByteArray* srcPixelArray, ByteArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize);
77 inline void platformApplyNeon(ByteArray* srcPixelArray, ByteArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize);
83 inline void FEGaussianBlur::kernelPosition(int boxBlur, unsigned& std, int& dLeft, int& dRight)
85 // check http://www.w3.org/TR/SVG/filters.html#feGaussianBlurElement for details
111 } // namespace WebCore
113 #endif // ENABLE(FILTERS)
115 #endif // FEGaussianBlur_h