khtml/rendering/SVGRenderSupport.cpp

   1 /*
   2  * Copyright (C) 2007 Rob Buis <buis@kde.org>
   3  *           (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
   4  *           (C) 2007 Eric Seidel <eric@webkit.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public License
  17  * along with this library; see the file COPYING.LIB.  If not, write to
  18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #include "config.h"
  24 #include "wtf/Platform.h"
  25
  26 #if ENABLE(SVG)
  27 #include "SVGRenderSupport.h"
  28
  29 #include "AffineTransform.h"
  30 /*#include "ImageBuffer.h"*/
  31 #include "RenderObject.h"
  32 #include "RenderSVGContainer.h"
  33 /*#include "RenderView.h"*/
  34 #include "SVGResourceClipper.h"
  35 /*#include "SVGResourceFilter.h"
  36 #include "SVGResourceMasker.h"*/
  37 #include "SVGStyledElement.h"
  38 #include "SVGURIReference.h"
  39
  40 namespace WebCore {
  41
  42 void prepareToRenderSVGContent(RenderObject* object, RenderObject::PaintInfo& paintInfo, const FloatRect& boundingBox, SVGResourceFilter*& filter, SVGResourceFilter* rootFilter)
  43 {
  44     SVGElement* svgElement = static_cast<SVGElement*>(object->element());
  45     ASSERT(svgElement && svgElement->document() && svgElement->isStyled());
  46     ASSERT(object);
  47
  48     SVGStyledElement* styledElement = static_cast<SVGStyledElement*>(svgElement);
  49     const RenderStyle* style = object->style();
  50     ASSERT(style);
  51
  52     const SVGRenderStyle* svgStyle = style->svgStyle();
  53     ASSERT(svgStyle);
  54
  55     /*// Setup transparency layers before setting up filters!
  56     float opacity = style->opacity();
  57     if (opacity < 1.0f) {
  58         paintInfo.context->clip(enclosingIntRect(boundingBox));
  59         paintInfo.context->beginTransparencyLayer(opacity);
  60     }*/
  61
  62 #if ENABLE(SVG_FILTERS)
  63     AtomicString filterId(SVGURIReference::getTarget(svgStyle->filter()));
  64 #endif
  65
  66     AtomicString clipperId(SVGURIReference::getTarget(svgStyle->clipPath()));
  67     //AtomicString maskerId(SVGURIReference::getTarget(svgStyle->maskElement()));
  68
  69     Document* document = object->document();
  70
  71 #if ENABLE(SVG_FILTERS)
  72     SVGResourceFilter* newFilter = getFilterById(document, filterId);
  73     if (newFilter == rootFilter) {
  74         // Catch <text filter="url(#foo)">Test<tspan filter="url(#foo)">123</tspan></text>.
  75         // The filter is NOT meant to be applied twice in that case!
  76         filter = 0;
  77         filterId = String();
  78     } else
  79         filter = newFilter;
  80 #endif
  81
  82     SVGResourceClipper* clipper = getClipperById(document, clipperId);
  83     //SVGResourceMasker* masker = getMaskerById(document, maskerId);
  84
  85 #if ENABLE(SVG_FILTERS)
  86     if (filter) {
  87         filter->addClient(styledElement);
  88         filter->prepareFilter(paintInfo.context, boundingBox);
  89     } else if (!filterId.isEmpty())
  90         svgElement->document()->accessSVGExtensions()->addPendingResource(filterId, styledElement);
  91 #endif
  92
  93     if (clipper) {
  94         clipper->addClient(styledElement);
  95         clipper->applyClip(paintInfo.p, boundingBox);
  96     } else if (!clipperId.isEmpty())
  97         svgElement->document()->accessSVGExtensions()->addPendingResource(clipperId, styledElement);
  98
  99     /*if (masker) {
 100         masker->addClient(styledElement);
 101         masker->applyMask(paintInfo.context, boundingBox);
 102     } else if (!maskerId.isEmpty())
 103         svgElement->document()->accessSVGExtensions()->addPendingResource(maskerId, styledElement);*/
 104 }
 105
 106 void finishRenderSVGContent(RenderObject* object, RenderObject::PaintInfo& paintInfo, const FloatRect& boundingBox, SVGResourceFilter*& filter, GraphicsContext* savedContext)
 107 {
 108 /*    ASSERT(object);
 109
 110     const RenderStyle* style = object->style();
 111     ASSERT(style);
 112
 113 #if ENABLE(SVG_FILTERS)
 114     if (filter) {
 115         filter->applyFilter(paintInfo.context, boundingBox);
 116         paintInfo.context = savedContext;
 117     }
 118 #endif
 119
 120     float opacity = style->opacity();
 121     if (opacity < 1.0f)
 122         paintInfo.context->endTransparencyLayer();*/
 123 }
 124
 125 /*void renderSubtreeToImage(ImageBuffer* image, RenderObject* item)
 126 {
 127     ASSERT(item);
 128     ASSERT(image);
 129     ASSERT(image->context());
 130     RenderObject::PaintInfo info(image->context(), IntRect(), PaintPhaseForeground, 0, 0, 0);
 131
 132     RenderSVGContainer* svgContainer = 0;
 133     if (item && item->isSVGContainer())
 134         svgContainer = static_cast<RenderSVGContainer*>(item);
 135
 136     bool drawsContents = svgContainer ? svgContainer->drawsContents() : false;
 137     if (svgContainer && !drawsContents)
 138         svgContainer->setDrawsContents(true);
 139
 140     item->layoutIfNeeded();
 141     item->paint(info, 0, 0);
 142
 143     if (svgContainer && !drawsContents)
 144         svgContainer->setDrawsContents(false);
 145 }
 146
 147 void clampImageBufferSizeToViewport(RenderObject* object, IntSize& size)
 148 {
 149     if (!object || !object->isRenderView())
 150         return;
 151
 152     RenderView* view = static_cast<RenderView*>(object);
 153     if (!view->frameView())
 154         return;
 155
 156     int viewWidth = view->frameView()->visibleWidth();
 157     int viewHeight = view->frameView()->visibleHeight();
 158
 159     if (size.width() > viewWidth)
 160         size.setWidth(viewWidth);
 161
 162     if (size.height() > viewHeight)
 163         size.setHeight(viewHeight);
 164 }*/
 165
 166 } // namespace WebCore
 167
 168 #endif // ENABLE(SVG)