| /* |
| Copyright (C) Alex Mathews <possessedpenguinbob@gmail.com> |
| |
| 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 |
| aint 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 "FilterEffect.h" |
| |
| namespace WebCore { |
| |
| FilterEffect::FilterEffect() |
| : m_hasX(false) |
| , m_hasY(false) |
| , m_hasWidth(false) |
| , m_hasHeight(false) |
| , m_alphaImage(false) |
| { |
| } |
| |
| FilterEffect::~FilterEffect() |
| { |
| } |
| |
| FloatRect FilterEffect::calculateUnionOfChildEffectSubregions(Filter* filter, FilterEffect* in) |
| { |
| return in->calculateEffectRect(filter); |
| } |
| |
| FloatRect FilterEffect::calculateUnionOfChildEffectSubregions(Filter* filter, FilterEffect* in, FilterEffect* in2) |
| { |
| FloatRect uniteEffectRect = in->calculateEffectRect(filter); |
| uniteEffectRect.unite(in2->calculateEffectRect(filter)); |
| return uniteEffectRect; |
| } |
| |
| FloatRect FilterEffect::calculateEffectRect(Filter* filter) |
| { |
| setUnionOfChildEffectSubregions(uniteChildEffectSubregions(filter)); |
| filter->calculateEffectSubRegion(this); |
| return subRegion(); |
| } |
| |
| IntRect FilterEffect::calculateDrawingIntRect(const FloatRect& effectRect) |
| { |
| IntPoint location = roundedIntPoint(FloatPoint(scaledSubRegion().x() - effectRect.x(), |
| scaledSubRegion().y() - effectRect.y())); |
| return IntRect(location, resultImage()->size()); |
| } |
| |
| FloatRect FilterEffect::calculateDrawingRect(const FloatRect& srcRect) |
| { |
| FloatPoint startPoint = FloatPoint(srcRect.x() - scaledSubRegion().x(), srcRect.y() - scaledSubRegion().y()); |
| FloatRect drawingRect = FloatRect(startPoint, srcRect.size()); |
| return drawingRect; |
| } |
| |
| GraphicsContext* FilterEffect::getEffectContext() |
| { |
| IntRect bufferRect = enclosingIntRect(scaledSubRegion()); |
| m_effectBuffer = ImageBuffer::create(bufferRect.size(), LinearRGB); |
| return m_effectBuffer->context(); |
| } |
| |
| TextStream& FilterEffect::externalRepresentation(TextStream& ts) const |
| { |
| return ts; |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(FILTERS) |