| /* |
| * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org> |
| * Copyright (C) 2005 Eric Seidel <eric@webkit.org> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #pragma once |
| |
| #include "FilterEffect.h" |
| |
| #include "Filter.h" |
| #include <wtf/Vector.h> |
| |
| namespace WebCore { |
| |
| enum ColorMatrixType { |
| FECOLORMATRIX_TYPE_UNKNOWN = 0, |
| FECOLORMATRIX_TYPE_MATRIX = 1, |
| FECOLORMATRIX_TYPE_SATURATE = 2, |
| FECOLORMATRIX_TYPE_HUEROTATE = 3, |
| FECOLORMATRIX_TYPE_LUMINANCETOALPHA = 4 |
| }; |
| |
| class FEColorMatrix : public FilterEffect { |
| public: |
| static Ref<FEColorMatrix> create(Filter&, ColorMatrixType, const Vector<float>&); |
| |
| ColorMatrixType type() const { return m_type; } |
| bool setType(ColorMatrixType); |
| |
| const Vector<float>& values() const { return m_values; } |
| bool setValues(const Vector<float>&); |
| |
| static inline void calculateSaturateComponents(float* components, float value); |
| static inline void calculateHueRotateComponents(float* components, float value); |
| |
| private: |
| FEColorMatrix(Filter&, ColorMatrixType, const Vector<float>&); |
| |
| const char* filterName() const final { return "FEColorMatrix"; } |
| |
| void platformApplySoftware() override; |
| |
| WTF::TextStream& externalRepresentation(WTF::TextStream&, RepresentationType) const override; |
| |
| ColorMatrixType m_type; |
| Vector<float> m_values; |
| }; |
| |
| inline void FEColorMatrix::calculateSaturateComponents(float* components, float value) |
| { |
| components[0] = (0.213 + 0.787 * value); |
| components[1] = (0.715 - 0.715 * value); |
| components[2] = (0.072 - 0.072 * value); |
| components[3] = (0.213 - 0.213 * value); |
| components[4] = (0.715 + 0.285 * value); |
| components[5] = (0.072 - 0.072 * value); |
| components[6] = (0.213 - 0.213 * value); |
| components[7] = (0.715 - 0.715 * value); |
| components[8] = (0.072 + 0.928 * value); |
| } |
| |
| inline void FEColorMatrix::calculateHueRotateComponents(float* components, float value) |
| { |
| float cosHue = cos(value * piFloat / 180); |
| float sinHue = sin(value * piFloat / 180); |
| components[0] = 0.213 + cosHue * 0.787 - sinHue * 0.213; |
| components[1] = 0.715 - cosHue * 0.715 - sinHue * 0.715; |
| components[2] = 0.072 - cosHue * 0.072 + sinHue * 0.928; |
| components[3] = 0.213 - cosHue * 0.213 + sinHue * 0.143; |
| components[4] = 0.715 + cosHue * 0.285 + sinHue * 0.140; |
| components[5] = 0.072 - cosHue * 0.072 - sinHue * 0.283; |
| components[6] = 0.213 - cosHue * 0.213 - sinHue * 0.787; |
| components[7] = 0.715 - cosHue * 0.715 + sinHue * 0.715; |
| components[8] = 0.072 + cosHue * 0.928 + sinHue * 0.072; |
| } |
| |
| |
| } // namespace WebCore |
| |