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
25 #include "FEConvolveMatrix.h"
27 #include "FilterEffect.h"
31 class FEGaussianBlur : public FilterEffect {
33 static PassRefPtr<FEGaussianBlur> create(Filter*, float, float, EdgeModeType);
35 float stdDeviationX() const;
36 void setStdDeviationX(float);
38 float stdDeviationY() const;
39 void setStdDeviationY(float);
41 EdgeModeType edgeMode() const;
42 void setEdgeMode(EdgeModeType);
44 virtual void platformApplySoftware();
47 virtual void determineAbsolutePaintRect();
48 static IntSize calculateKernelSize(const Filter&, const FloatPoint& stdDeviation);
49 static IntSize calculateUnscaledKernelSize(const FloatPoint& stdDeviation);
51 virtual TextStream& externalRepresentation(TextStream&, int indention) const;
54 static const int s_minimalRectDimension = 100 * 100; // Empirical data limit for parallel jobs
56 template<typename Type>
57 friend class ParallelJobs;
59 struct PlatformApplyParameters {
60 FEGaussianBlur* filter;
61 RefPtr<Uint8ClampedArray> srcPixelArray;
62 RefPtr<Uint8ClampedArray> dstPixelArray;
69 static void platformApplyWorker(PlatformApplyParameters*);
71 FEGaussianBlur(Filter*, float, float, EdgeModeType);
73 inline void platformApply(Uint8ClampedArray* srcPixelArray, Uint8ClampedArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize);
75 inline void platformApplyGeneric(Uint8ClampedArray* srcPixelArray, Uint8ClampedArray* tmpPixelArray, unsigned kernelSizeX, unsigned kernelSizeY, IntSize& paintSize);
79 EdgeModeType m_edgeMode;
82 } // namespace WebCore
84 #endif // FEGaussianBlur_h