| /* |
| * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) Research In Motion Limited 2010. 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" |
| |
| #if ENABLE(SVG) |
| #include "RenderSVGResourcePattern.h" |
| |
| #include "FrameView.h" |
| #include "GraphicsContext.h" |
| #include "PatternAttributes.h" |
| #include "SVGRenderSupport.h" |
| |
| namespace WebCore { |
| |
| RenderSVGResourceType RenderSVGResourcePattern::s_resourceType = PatternResourceType; |
| |
| RenderSVGResourcePattern::RenderSVGResourcePattern(SVGPatternElement* node) |
| : RenderSVGResourceContainer(node) |
| { |
| } |
| |
| RenderSVGResourcePattern::~RenderSVGResourcePattern() |
| { |
| deleteAllValues(m_pattern); |
| m_pattern.clear(); |
| } |
| |
| void RenderSVGResourcePattern::invalidateClients() |
| { |
| const HashMap<RenderObject*, PatternData*>::const_iterator end = m_pattern.end(); |
| for (HashMap<RenderObject*, PatternData*>::const_iterator it = m_pattern.begin(); it != end; ++it) |
| markForLayoutAndResourceInvalidation(it->first); |
| |
| deleteAllValues(m_pattern); |
| m_pattern.clear(); |
| } |
| |
| void RenderSVGResourcePattern::invalidateClient(RenderObject* object) |
| { |
| ASSERT(object); |
| |
| // FIXME: The HashMap should always contain the object on calling invalidateClient. A race condition |
| // during the parsing can causes a call of invalidateClient right before the call of applyResource. |
| // We return earlier for the moment. This bug should be fixed in: |
| // https://bugs.webkit.org/show_bug.cgi?id=35181 |
| if (!m_pattern.contains(object)) |
| return; |
| |
| delete m_pattern.take(object); |
| markForLayoutAndResourceInvalidation(object); |
| } |
| |
| bool RenderSVGResourcePattern::applyResource(RenderObject* object, RenderStyle* style, GraphicsContext*& context, unsigned short resourceMode) |
| { |
| ASSERT(object); |
| ASSERT(style); |
| ASSERT(context); |
| ASSERT(resourceMode != ApplyToDefaultMode); |
| |
| // Be sure to synchronize all SVG properties on the patternElement _before_ processing any further. |
| // Otherwhise the call to collectPatternAttributes() in createTileImage(), may cause the SVG DOM property |
| // synchronization to kick in, which causes invalidateClients() to be called, which in turn deletes our |
| // PatternData object! Leaving out the line below will cause svg/dynamic-updates/SVGPatternElement-svgdom* to crash. |
| SVGPatternElement* patternElement = static_cast<SVGPatternElement*>(node()); |
| if (!patternElement) |
| return false; |
| |
| patternElement->updateAnimatedSVGAttribute(anyQName()); |
| |
| if (!m_pattern.contains(object)) |
| m_pattern.set(object, new PatternData); |
| |
| PatternData* patternData = m_pattern.get(object); |
| if (!patternData->pattern) { |
| |
| // Create tile image |
| OwnPtr<ImageBuffer> tileImage = createTileImage(patternData, patternElement, object); |
| if (!tileImage) |
| return false; |
| |
| // Create pattern object |
| buildPattern(patternData, tileImage.release()); |
| |
| if (!patternData->pattern) |
| return false; |
| |
| patternData->pattern->setPatternSpaceTransform(patternData->transform); |
| } |
| |
| // Draw pattern |
| context->save(); |
| |
| const SVGRenderStyle* svgStyle = style->svgStyle(); |
| ASSERT(svgStyle); |
| |
| if (resourceMode & ApplyToFillMode) { |
| context->setAlpha(svgStyle->fillOpacity()); |
| context->setFillPattern(patternData->pattern); |
| context->setFillRule(svgStyle->fillRule()); |
| } else if (resourceMode & ApplyToStrokeMode) { |
| if (svgStyle->vectorEffect() == VE_NON_SCALING_STROKE) |
| patternData->pattern->setPatternSpaceTransform(transformOnNonScalingStroke(object, patternData->transform)); |
| context->setAlpha(svgStyle->strokeOpacity()); |
| context->setStrokePattern(patternData->pattern); |
| SVGRenderSupport::applyStrokeStyleToContext(context, style, object); |
| } |
| |
| if (resourceMode & ApplyToTextMode) { |
| if (resourceMode & ApplyToFillMode) { |
| context->setTextDrawingMode(cTextFill); |
| |
| #if PLATFORM(CG) |
| context->applyFillPattern(); |
| #endif |
| } else if (resourceMode & ApplyToStrokeMode) { |
| context->setTextDrawingMode(cTextStroke); |
| |
| #if PLATFORM(CG) |
| context->applyStrokePattern(); |
| #endif |
| } |
| } |
| |
| return true; |
| } |
| |
| void RenderSVGResourcePattern::postApplyResource(RenderObject*, GraphicsContext*& context, unsigned short resourceMode) |
| { |
| ASSERT(context); |
| ASSERT(resourceMode != ApplyToDefaultMode); |
| |
| if (!(resourceMode & ApplyToTextMode)) { |
| if (resourceMode & ApplyToFillMode) |
| context->fillPath(); |
| else if (resourceMode & ApplyToStrokeMode) |
| context->strokePath(); |
| } |
| |
| context->restore(); |
| } |
| |
| static inline FloatRect calculatePatternBoundaries(PatternAttributes& attributes, |
| const FloatRect& objectBoundingBox, |
| const SVGPatternElement* patternElement) |
| { |
| if (attributes.boundingBoxMode()) |
| return FloatRect(attributes.x().valueAsPercentage() * objectBoundingBox.width(), |
| attributes.y().valueAsPercentage() * objectBoundingBox.height(), |
| attributes.width().valueAsPercentage() * objectBoundingBox.width(), |
| attributes.height().valueAsPercentage() * objectBoundingBox.height()); |
| |
| return FloatRect(attributes.x().value(patternElement), |
| attributes.y().value(patternElement), |
| attributes.width().value(patternElement), |
| attributes.height().value(patternElement)); |
| } |
| |
| FloatRect RenderSVGResourcePattern::calculatePatternBoundariesIncludingOverflow(PatternAttributes& attributes, |
| const FloatRect& objectBoundingBox, |
| const AffineTransform& viewBoxCTM, |
| const FloatRect& patternBoundaries) const |
| { |
| // Eventually calculate the pattern content boundaries (only needed with overflow="visible"). |
| FloatRect patternContentBoundaries; |
| |
| const RenderStyle* style = this->style(); |
| if (style->overflowX() == OVISIBLE && style->overflowY() == OVISIBLE) { |
| for (Node* node = attributes.patternContentElement()->firstChild(); node; node = node->nextSibling()) { |
| if (!node->isSVGElement() || !static_cast<SVGElement*>(node)->isStyledTransformable() || !node->renderer()) |
| continue; |
| patternContentBoundaries.unite(node->renderer()->repaintRectInLocalCoordinates()); |
| } |
| } |
| |
| if (patternContentBoundaries.isEmpty()) |
| return patternBoundaries; |
| |
| FloatRect patternBoundariesIncludingOverflow = patternBoundaries; |
| |
| // Respect objectBoundingBoxMode for patternContentUnits, if viewBox is not set. |
| if (!viewBoxCTM.isIdentity()) |
| patternContentBoundaries = viewBoxCTM.mapRect(patternContentBoundaries); |
| else if (attributes.boundingBoxModeContent()) |
| patternContentBoundaries = FloatRect(patternContentBoundaries.x() * objectBoundingBox.width(), |
| patternContentBoundaries.y() * objectBoundingBox.height(), |
| patternContentBoundaries.width() * objectBoundingBox.width(), |
| patternContentBoundaries.height() * objectBoundingBox.height()); |
| |
| patternBoundariesIncludingOverflow.unite(patternContentBoundaries); |
| return patternBoundariesIncludingOverflow; |
| } |
| |
| // FIXME: This method should be removed. RenderSVGResourcePatterns usage of it is just wrong. |
| static inline void clampImageBufferSizeToViewport(FrameView* frameView, IntSize& size) |
| { |
| if (!frameView) |
| return; |
| |
| int viewWidth = frameView->visibleWidth(); |
| int viewHeight = frameView->visibleHeight(); |
| |
| if (size.width() > viewWidth) |
| size.setWidth(viewWidth); |
| |
| if (size.height() > viewHeight) |
| size.setHeight(viewHeight); |
| } |
| |
| PassOwnPtr<ImageBuffer> RenderSVGResourcePattern::createTileImage(PatternData* patternData, |
| const SVGPatternElement* patternElement, |
| RenderObject* object) const |
| { |
| PatternAttributes attributes = patternElement->collectPatternProperties(); |
| |
| // If we couldn't determine the pattern content element root, stop here. |
| if (!attributes.patternContentElement()) |
| return 0; |
| |
| FloatRect objectBoundingBox = object->objectBoundingBox(); |
| FloatRect patternBoundaries = calculatePatternBoundaries(attributes, objectBoundingBox, patternElement); |
| AffineTransform patternTransform = attributes.patternTransform(); |
| |
| AffineTransform viewBoxCTM = patternElement->viewBoxToViewTransform(patternElement->viewBox(), |
| patternElement->preserveAspectRatio(), |
| patternBoundaries.width(), |
| patternBoundaries.height()); |
| |
| FloatRect patternBoundariesIncludingOverflow = calculatePatternBoundariesIncludingOverflow(attributes, |
| objectBoundingBox, |
| viewBoxCTM, |
| patternBoundaries); |
| |
| IntSize imageSize(lroundf(patternBoundariesIncludingOverflow.width()), lroundf(patternBoundariesIncludingOverflow.height())); |
| |
| // FIXME: We should be able to clip this more, needs investigation |
| clampImageBufferSizeToViewport(object->document()->view(), imageSize); |
| |
| // Don't create ImageBuffers with image size of 0 |
| if (imageSize.isEmpty()) |
| return 0; |
| |
| OwnPtr<ImageBuffer> tileImage = ImageBuffer::create(imageSize); |
| |
| GraphicsContext* context = tileImage->context(); |
| ASSERT(context); |
| |
| context->save(); |
| |
| // Translate to pattern start origin |
| if (patternBoundariesIncludingOverflow.location() != patternBoundaries.location()) { |
| context->translate(patternBoundaries.x() - patternBoundariesIncludingOverflow.x(), |
| patternBoundaries.y() - patternBoundariesIncludingOverflow.y()); |
| |
| patternBoundaries.setLocation(patternBoundariesIncludingOverflow.location()); |
| } |
| |
| // Process viewBox or boundingBoxModeContent correction |
| if (!viewBoxCTM.isIdentity()) |
| context->concatCTM(viewBoxCTM); |
| else if (attributes.boundingBoxModeContent()) { |
| context->translate(objectBoundingBox.x(), objectBoundingBox.y()); |
| context->scale(FloatSize(objectBoundingBox.width(), objectBoundingBox.height())); |
| } |
| |
| // Render subtree into ImageBuffer |
| for (Node* node = attributes.patternContentElement()->firstChild(); node; node = node->nextSibling()) { |
| if (!node->isSVGElement() || !static_cast<SVGElement*>(node)->isStyled() || !node->renderer()) |
| continue; |
| SVGRenderSupport::renderSubtreeToImage(tileImage.get(), node->renderer()); |
| } |
| |
| patternData->boundaries = patternBoundaries; |
| |
| // Compute pattern transformation |
| patternData->transform.translate(patternBoundaries.x(), patternBoundaries.y()); |
| patternData->transform.multiply(patternTransform); |
| |
| context->restore(); |
| return tileImage.release(); |
| } |
| |
| void RenderSVGResourcePattern::buildPattern(PatternData* patternData, PassOwnPtr<ImageBuffer> tileImage) const |
| { |
| if (!tileImage->image()) { |
| patternData->pattern = 0; |
| return; |
| } |
| |
| IntRect tileRect = tileImage->image()->rect(); |
| if (tileRect.width() <= patternData->boundaries.width() && tileRect.height() <= patternData->boundaries.height()) { |
| patternData->pattern = Pattern::create(tileImage->image(), true, true); |
| return; |
| } |
| |
| // Draw the first cell of the pattern manually to support overflow="visible" on all platforms. |
| int tileWidth = static_cast<int>(patternData->boundaries.width() + 0.5f); |
| int tileHeight = static_cast<int>(patternData->boundaries.height() + 0.5f); |
| |
| // Don't create ImageBuffers with image size of 0 |
| if (!tileWidth || !tileHeight) { |
| patternData->pattern = 0; |
| return; |
| } |
| |
| OwnPtr<ImageBuffer> newTileImage = ImageBuffer::create(IntSize(tileWidth, tileHeight)); |
| GraphicsContext* newTileImageContext = newTileImage->context(); |
| |
| int numY = static_cast<int>(ceilf(tileRect.height() / tileHeight)) + 1; |
| int numX = static_cast<int>(ceilf(tileRect.width() / tileWidth)) + 1; |
| |
| newTileImageContext->save(); |
| newTileImageContext->translate(-patternData->boundaries.width() * numX, -patternData->boundaries.height() * numY); |
| for (int i = numY; i > 0; --i) { |
| newTileImageContext->translate(0, patternData->boundaries.height()); |
| for (int j = numX; j > 0; --j) { |
| newTileImageContext->translate(patternData->boundaries.width(), 0); |
| newTileImageContext->drawImage(tileImage->image(), style()->colorSpace(), tileRect, tileRect); |
| } |
| newTileImageContext->translate(-patternData->boundaries.width() * numX, 0); |
| } |
| newTileImageContext->restore(); |
| |
| patternData->pattern = Pattern::create(newTileImage->image(), true, true); |
| } |
| |
| } |
| |
| #endif |
