| /* |
| * 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> |
| * Copyright (C) 2009 Dirk Schulze <krit@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. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(FILTERS) |
| #include "FEColorMatrix.h" |
| |
| #include "Filter.h" |
| #include "GraphicsContext.h" |
| #include "RenderTreeAsText.h" |
| #include "TextStream.h" |
| |
| #include <wtf/MathExtras.h> |
| #include <wtf/Uint8ClampedArray.h> |
| |
| namespace WebCore { |
| |
| FEColorMatrix::FEColorMatrix(Filter* filter, ColorMatrixType type, const Vector<float>& values) |
| : FilterEffect(filter) |
| , m_type(type) |
| , m_values(values) |
| { |
| } |
| |
| PassRefPtr<FEColorMatrix> FEColorMatrix::create(Filter* filter, ColorMatrixType type, const Vector<float>& values) |
| { |
| return adoptRef(new FEColorMatrix(filter, type, values)); |
| } |
| |
| ColorMatrixType FEColorMatrix::type() const |
| { |
| return m_type; |
| } |
| |
| bool FEColorMatrix::setType(ColorMatrixType type) |
| { |
| if (m_type == type) |
| return false; |
| m_type = type; |
| return true; |
| } |
| |
| const Vector<float>& FEColorMatrix::values() const |
| { |
| return m_values; |
| } |
| |
| bool FEColorMatrix::setValues(const Vector<float> &values) |
| { |
| if (m_values == values) |
| return false; |
| m_values = values; |
| return true; |
| } |
| |
| inline void matrix(float& red, float& green, float& blue, float& alpha, const Vector<float>& values) |
| { |
| float r = values[0] * red + values[1] * green + values[2] * blue + values[3] * alpha + values[4] * 255; |
| float g = values[5] * red + values[6] * green + values[7] * blue + values[8] * alpha + values[9] * 255; |
| float b = values[10] * red + values[11] * green + values[12] * blue + values[13] * alpha + values[14] * 255; |
| float a = values[15] * red + values[16] * green + values[17] * blue + values[18] * alpha + values[19] * 255; |
| |
| red = r; |
| green = g; |
| blue = b; |
| alpha = a; |
| } |
| |
| inline void saturate(float& red, float& green, float& blue, const float& s) |
| { |
| float r = (0.213 + 0.787 * s) * red + (0.715 - 0.715 * s) * green + (0.072 - 0.072 * s) * blue; |
| float g = (0.213 - 0.213 * s) * red + (0.715 + 0.285 * s) * green + (0.072 - 0.072 * s) * blue; |
| float b = (0.213 - 0.213 * s) * red + (0.715 - 0.715 * s) * green + (0.072 + 0.928 * s) * blue; |
| |
| red = r; |
| green = g; |
| blue = b; |
| } |
| |
| inline void huerotate(float& red, float& green, float& blue, const float& hue) |
| { |
| float cosHue = cos(hue * piDouble / 180); |
| float sinHue = sin(hue * piDouble / 180); |
| float r = red * (0.213 + cosHue * 0.787 - sinHue * 0.213) + |
| green * (0.715 - cosHue * 0.715 - sinHue * 0.715) + |
| blue * (0.072 - cosHue * 0.072 + sinHue * 0.928); |
| float g = red * (0.213 - cosHue * 0.213 + sinHue * 0.143) + |
| green * (0.715 + cosHue * 0.285 + sinHue * 0.140) + |
| blue * (0.072 - cosHue * 0.072 - sinHue * 0.283); |
| float b = red * (0.213 - cosHue * 0.213 - sinHue * 0.787) + |
| green * (0.715 - cosHue * 0.715 + sinHue * 0.715) + |
| blue * (0.072 + cosHue * 0.928 + sinHue * 0.072); |
| |
| red = r; |
| green = g; |
| blue = b; |
| } |
| |
| inline void luminance(float& red, float& green, float& blue, float& alpha) |
| { |
| alpha = 0.2125 * red + 0.7154 * green + 0.0721 * blue; |
| red = 0; |
| green = 0; |
| blue = 0; |
| } |
| |
| template<ColorMatrixType filterType> |
| void effectType(Uint8ClampedArray* pixelArray, const Vector<float>& values) |
| { |
| unsigned pixelArrayLength = pixelArray->length(); |
| for (unsigned pixelByteOffset = 0; pixelByteOffset < pixelArrayLength; pixelByteOffset += 4) { |
| float red = pixelArray->item(pixelByteOffset); |
| float green = pixelArray->item(pixelByteOffset + 1); |
| float blue = pixelArray->item(pixelByteOffset + 2); |
| float alpha = pixelArray->item(pixelByteOffset + 3); |
| |
| switch (filterType) { |
| case FECOLORMATRIX_TYPE_MATRIX: |
| matrix(red, green, blue, alpha, values); |
| break; |
| case FECOLORMATRIX_TYPE_SATURATE: |
| saturate(red, green, blue, values[0]); |
| break; |
| case FECOLORMATRIX_TYPE_HUEROTATE: |
| huerotate(red, green, blue, values[0]); |
| break; |
| case FECOLORMATRIX_TYPE_LUMINANCETOALPHA: |
| luminance(red, green, blue, alpha); |
| break; |
| } |
| |
| pixelArray->set(pixelByteOffset, red); |
| pixelArray->set(pixelByteOffset + 1, green); |
| pixelArray->set(pixelByteOffset + 2, blue); |
| pixelArray->set(pixelByteOffset + 3, alpha); |
| } |
| } |
| |
| void FEColorMatrix::platformApplySoftware() |
| { |
| FilterEffect* in = inputEffect(0); |
| |
| ImageBuffer* resultImage = createImageBufferResult(); |
| if (!resultImage) |
| return; |
| |
| resultImage->context()->drawImageBuffer(in->asImageBuffer(), ColorSpaceDeviceRGB, drawingRegionOfInputImage(in->absolutePaintRect())); |
| |
| IntRect imageRect(IntPoint(), absolutePaintRect().size()); |
| RefPtr<Uint8ClampedArray> pixelArray = resultImage->getUnmultipliedImageData(imageRect); |
| |
| switch (m_type) { |
| case FECOLORMATRIX_TYPE_UNKNOWN: |
| break; |
| case FECOLORMATRIX_TYPE_MATRIX: |
| effectType<FECOLORMATRIX_TYPE_MATRIX>(pixelArray.get(), m_values); |
| break; |
| case FECOLORMATRIX_TYPE_SATURATE: |
| effectType<FECOLORMATRIX_TYPE_SATURATE>(pixelArray.get(), m_values); |
| break; |
| case FECOLORMATRIX_TYPE_HUEROTATE: |
| effectType<FECOLORMATRIX_TYPE_HUEROTATE>(pixelArray.get(), m_values); |
| break; |
| case FECOLORMATRIX_TYPE_LUMINANCETOALPHA: |
| effectType<FECOLORMATRIX_TYPE_LUMINANCETOALPHA>(pixelArray.get(), m_values); |
| setIsAlphaImage(true); |
| break; |
| } |
| |
| resultImage->putByteArray(Unmultiplied, pixelArray.get(), imageRect.size(), imageRect, IntPoint()); |
| } |
| |
| void FEColorMatrix::dump() |
| { |
| } |
| |
| static TextStream& operator<<(TextStream& ts, const ColorMatrixType& type) |
| { |
| switch (type) { |
| case FECOLORMATRIX_TYPE_UNKNOWN: |
| ts << "UNKNOWN"; |
| break; |
| case FECOLORMATRIX_TYPE_MATRIX: |
| ts << "MATRIX"; |
| break; |
| case FECOLORMATRIX_TYPE_SATURATE: |
| ts << "SATURATE"; |
| break; |
| case FECOLORMATRIX_TYPE_HUEROTATE: |
| ts << "HUEROTATE"; |
| break; |
| case FECOLORMATRIX_TYPE_LUMINANCETOALPHA: |
| ts << "LUMINANCETOALPHA"; |
| break; |
| } |
| return ts; |
| } |
| |
| TextStream& FEColorMatrix::externalRepresentation(TextStream& ts, int indent) const |
| { |
| writeIndent(ts, indent); |
| ts << "[feColorMatrix"; |
| FilterEffect::externalRepresentation(ts); |
| ts << " type=\"" << m_type << "\""; |
| if (!m_values.isEmpty()) { |
| ts << " values=\""; |
| Vector<float>::const_iterator ptr = m_values.begin(); |
| const Vector<float>::const_iterator end = m_values.end(); |
| while (ptr < end) { |
| ts << *ptr; |
| ++ptr; |
| if (ptr < end) |
| ts << " "; |
| } |
| ts << "\""; |
| } |
| ts << "]\n"; |
| inputEffect(0)->externalRepresentation(ts, indent + 1); |
| return ts; |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(FILTERS) |