| /* |
| Copyright (C) 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> |
| |
| This file is part of the KDE project |
| |
| 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(SVG) |
| #include "SVGPaintServerPattern.h" |
| |
| #include "CgSupport.h" |
| #include "GraphicsContext.h" |
| #include "ImageBuffer.h" |
| #include "RenderObject.h" |
| #include "SVGPatternElement.h" |
| |
| namespace WebCore { |
| |
| static void patternCallback(void* info, CGContextRef context) |
| { |
| ImageBuffer* patternImage = reinterpret_cast<ImageBuffer*>(info); |
| CGContextDrawImage(context, CGRect(FloatRect(FloatPoint(), patternImage->size())), patternImage->cgImage()); |
| } |
| |
| bool SVGPaintServerPattern::setup(GraphicsContext*& context, const RenderObject* object, SVGPaintTargetType type, bool isPaintingText) const |
| { |
| CGContextRef contextRef = context->platformContext(); |
| |
| // Build pattern tile, passing destination object bounding box |
| FloatRect targetRect; |
| if (isPaintingText) { |
| IntRect textBoundary = const_cast<RenderObject*>(object)->absoluteBoundingBoxRect(); |
| targetRect = object->absoluteTransform().inverse().mapRect(textBoundary); |
| } else |
| targetRect = object->relativeBBox(false); |
| |
| m_ownerElement->buildPattern(targetRect); |
| |
| if (!tile()) |
| return false; |
| |
| context->save(); |
| |
| // Respect local pattern transformation |
| context->concatCTM(patternTransform()); |
| |
| // Apply pattern space transformation |
| context->translate(patternBoundaries().x(), patternBoundaries().y()); |
| |
| // Crude hack to support overflow="visible". |
| // When the patternBoundaries() size is smaller than the actual tile() size, we run into a problem: |
| // Our tile contains content which is larger than the pattern cell size. We just draw the pattern |
| // "out of" cell boundaries, to draw the overflown content, instead of clipping it away. The uppermost |
| // cell doesn't include the overflown content of the cell right above it though -> that's why we're moving |
| // down the phase by a very small amount, so we're sure the "cell right above"'s overflown content gets drawn. |
| CGContextSetPatternPhase(contextRef, CGSizeMake(0.0f, -0.01f)); |
| |
| RenderStyle* style = object->style(); |
| CGContextSetAlpha(contextRef, style->opacity()); |
| |
| CGPatternCallbacks callbacks = {0, patternCallback, 0}; |
| |
| ASSERT(!m_pattern); |
| m_pattern = CGPatternCreate(tile(), |
| CGRect(FloatRect(FloatPoint(), tile()->size())), |
| CGContextGetCTM(contextRef), |
| patternBoundaries().width(), |
| patternBoundaries().height(), |
| kCGPatternTilingConstantSpacing, |
| true, // has color |
| &callbacks); |
| |
| if (!m_patternSpace) |
| m_patternSpace = CGColorSpaceCreatePattern(0); |
| |
| if ((type & ApplyToFillTargetType) && style->svgStyle()->hasFill()) { |
| CGFloat alpha = style->svgStyle()->fillOpacity(); |
| CGContextSetFillColorSpace(contextRef, m_patternSpace); |
| CGContextSetFillPattern(contextRef, m_pattern, &alpha); |
| |
| if (isPaintingText) |
| context->setTextDrawingMode(cTextFill); |
| } |
| |
| if ((type & ApplyToStrokeTargetType) && style->svgStyle()->hasStroke()) { |
| CGFloat alpha = style->svgStyle()->strokeOpacity(); |
| CGContextSetStrokeColorSpace(contextRef, m_patternSpace); |
| CGContextSetStrokePattern(contextRef, m_pattern, &alpha); |
| applyStrokeStyleToContext(context, style, object); |
| |
| if (isPaintingText) |
| context->setTextDrawingMode(cTextStroke); |
| } |
| |
| return true; |
| } |
| |
| void SVGPaintServerPattern::teardown(GraphicsContext*& context, const RenderObject*, SVGPaintTargetType, bool) const |
| { |
| CGPatternRelease(m_pattern); |
| m_pattern = 0; |
| |
| context->restore(); |
| } |
| |
| } // namespace WebCore |
| |
| #endif |
| |
| // vim:ts=4:noet |