| /* |
| * 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> |
| * Copyright (C) 2010 Zoltan Herczeg <zherczeg@webkit.org> |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * 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" |
| #include "platform/graphics/filters/FEConvolveMatrix.h" |
| |
| #include "SkMatrixConvolutionImageFilter.h" |
| #include "platform/graphics/filters/SkiaImageFilterBuilder.h" |
| #include "platform/text/TextStream.h" |
| #include "wtf/OwnPtr.h" |
| |
| namespace blink { |
| |
| FEConvolveMatrix::FEConvolveMatrix(Filter* filter, const IntSize& kernelSize, |
| float divisor, float bias, const IntPoint& targetOffset, EdgeModeType edgeMode, |
| bool preserveAlpha, const Vector<float>& kernelMatrix) |
| : FilterEffect(filter) |
| , m_kernelSize(kernelSize) |
| , m_divisor(divisor) |
| , m_bias(bias) |
| , m_targetOffset(targetOffset) |
| , m_edgeMode(edgeMode) |
| , m_preserveAlpha(preserveAlpha) |
| , m_kernelMatrix(kernelMatrix) |
| { |
| ASSERT(m_kernelSize.width() > 0); |
| ASSERT(m_kernelSize.height() > 0); |
| } |
| |
| PassRefPtrWillBeRawPtr<FEConvolveMatrix> FEConvolveMatrix::create(Filter* filter, const IntSize& kernelSize, |
| float divisor, float bias, const IntPoint& targetOffset, EdgeModeType edgeMode, |
| bool preserveAlpha, const Vector<float>& kernelMatrix) |
| { |
| return adoptRefWillBeNoop(new FEConvolveMatrix(filter, kernelSize, divisor, bias, targetOffset, edgeMode, |
| preserveAlpha, kernelMatrix)); |
| } |
| |
| FloatRect FEConvolveMatrix::mapPaintRect(const FloatRect& rect, bool forward) |
| { |
| FloatRect result = rect; |
| |
| result.moveBy(forward ? -m_targetOffset : m_targetOffset - m_kernelSize); |
| result.expand(m_kernelSize); |
| return result; |
| } |
| |
| IntSize FEConvolveMatrix::kernelSize() const |
| { |
| return m_kernelSize; |
| } |
| |
| void FEConvolveMatrix::setKernelSize(const IntSize& kernelSize) |
| { |
| ASSERT(kernelSize.width() > 0); |
| ASSERT(kernelSize.height() > 0); |
| m_kernelSize = kernelSize; |
| } |
| |
| const Vector<float>& FEConvolveMatrix::kernel() const |
| { |
| return m_kernelMatrix; |
| } |
| |
| void FEConvolveMatrix::setKernel(const Vector<float>& kernel) |
| { |
| m_kernelMatrix = kernel; |
| } |
| |
| float FEConvolveMatrix::divisor() const |
| { |
| return m_divisor; |
| } |
| |
| bool FEConvolveMatrix::setDivisor(float divisor) |
| { |
| ASSERT(divisor); |
| if (m_divisor == divisor) |
| return false; |
| m_divisor = divisor; |
| return true; |
| } |
| |
| float FEConvolveMatrix::bias() const |
| { |
| return m_bias; |
| } |
| |
| bool FEConvolveMatrix::setBias(float bias) |
| { |
| if (m_bias == bias) |
| return false; |
| m_bias = bias; |
| return true; |
| } |
| |
| IntPoint FEConvolveMatrix::targetOffset() const |
| { |
| return m_targetOffset; |
| } |
| |
| bool FEConvolveMatrix::setTargetOffset(const IntPoint& targetOffset) |
| { |
| if (m_targetOffset == targetOffset) |
| return false; |
| m_targetOffset = targetOffset; |
| return true; |
| } |
| |
| EdgeModeType FEConvolveMatrix::edgeMode() const |
| { |
| return m_edgeMode; |
| } |
| |
| bool FEConvolveMatrix::setEdgeMode(EdgeModeType edgeMode) |
| { |
| if (m_edgeMode == edgeMode) |
| return false; |
| m_edgeMode = edgeMode; |
| return true; |
| } |
| |
| bool FEConvolveMatrix::preserveAlpha() const |
| { |
| return m_preserveAlpha; |
| } |
| |
| bool FEConvolveMatrix::setPreserveAlpha(bool preserveAlpha) |
| { |
| if (m_preserveAlpha == preserveAlpha) |
| return false; |
| m_preserveAlpha = preserveAlpha; |
| return true; |
| } |
| |
| SkMatrixConvolutionImageFilter::TileMode toSkiaTileMode(EdgeModeType edgeMode) |
| { |
| switch (edgeMode) { |
| case EDGEMODE_DUPLICATE: |
| return SkMatrixConvolutionImageFilter::kClamp_TileMode; |
| case EDGEMODE_WRAP: |
| return SkMatrixConvolutionImageFilter::kRepeat_TileMode; |
| case EDGEMODE_NONE: |
| return SkMatrixConvolutionImageFilter::kClampToBlack_TileMode; |
| default: |
| return SkMatrixConvolutionImageFilter::kClamp_TileMode; |
| } |
| } |
| |
| PassRefPtr<SkImageFilter> FEConvolveMatrix::createImageFilter(SkiaImageFilterBuilder* builder) |
| { |
| RefPtr<SkImageFilter> input(builder->build(inputEffect(0), operatingColorSpace())); |
| |
| SkISize kernelSize(SkISize::Make(m_kernelSize.width(), m_kernelSize.height())); |
| int numElements = kernelSize.width() * kernelSize.height(); |
| SkScalar gain = SkFloatToScalar(1.0f / m_divisor); |
| SkScalar bias = SkFloatToScalar(m_bias * 255); |
| SkIPoint target = SkIPoint::Make(m_targetOffset.x(), m_targetOffset.y()); |
| SkMatrixConvolutionImageFilter::TileMode tileMode = toSkiaTileMode(m_edgeMode); |
| bool convolveAlpha = !m_preserveAlpha; |
| OwnPtr<SkScalar[]> kernel = adoptArrayPtr(new SkScalar[numElements]); |
| for (int i = 0; i < numElements; ++i) |
| kernel[i] = SkFloatToScalar(m_kernelMatrix[numElements - 1 - i]); |
| SkImageFilter::CropRect cropRect = getCropRect(builder->cropOffset()); |
| return adoptRef(SkMatrixConvolutionImageFilter::Create(kernelSize, kernel.get(), gain, bias, target, tileMode, convolveAlpha, input.get(), &cropRect)); |
| } |
| |
| static TextStream& operator<<(TextStream& ts, const EdgeModeType& type) |
| { |
| switch (type) { |
| case EDGEMODE_UNKNOWN: |
| ts << "UNKNOWN"; |
| break; |
| case EDGEMODE_DUPLICATE: |
| ts << "DUPLICATE"; |
| break; |
| case EDGEMODE_WRAP: |
| ts << "WRAP"; |
| break; |
| case EDGEMODE_NONE: |
| ts << "NONE"; |
| break; |
| } |
| return ts; |
| } |
| |
| TextStream& FEConvolveMatrix::externalRepresentation(TextStream& ts, int indent) const |
| { |
| writeIndent(ts, indent); |
| ts << "[feConvolveMatrix"; |
| FilterEffect::externalRepresentation(ts); |
| ts << " order=\"" << m_kernelSize << "\" " |
| << "kernelMatrix=\"" << m_kernelMatrix << "\" " |
| << "divisor=\"" << m_divisor << "\" " |
| << "bias=\"" << m_bias << "\" " |
| << "target=\"" << m_targetOffset << "\" " |
| << "edgeMode=\"" << m_edgeMode << "\" " |
| << "preserveAlpha=\"" << m_preserveAlpha << "\"]\n"; |
| inputEffect(0)->externalRepresentation(ts, indent + 1); |
| return ts; |
| } |
| |
| } // namespace blink |