1 /** 2 * Copyright (C) 2007 Rob Buis <buis (at) kde.org> 3 * (C) 2007 Nikolas Zimmermann <zimmermann (at) kde.org> 4 * (C) 2007 Eric Seidel <eric (at) webkit.org> 5 * Copyright (C) 2009 Google, Inc. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 * 22 */ 23 24 #ifndef SVGRenderBase_h 25 #define SVGRenderBase_h 26 27 #if ENABLE(SVG) 28 #include "RenderObject.h" 29 30 namespace WebCore { 31 32 class SVGResourceFilter; 33 class ImageBuffer; 34 35 // SVGRendererBase is an abstract base class which all SVG renderers inherit 36 // from in order to share SVG renderer code. 37 // FIXME: This code can all move into RenderSVGModelObject once 38 // all SVG renderers inherit from RenderSVGModelObject. 39 class SVGRenderBase { 40 public: 41 virtual ~SVGRenderBase(); 42 43 virtual const SVGRenderBase* toSVGRenderBase() const { return this; } 44 45 // FIXME: These are only public for SVGRootInlineBox. 46 // It's unclear if these should be exposed or not. SVGRootInlineBox may 47 // pass the wrong RenderObject* and boundingBox to these functions. 48 static bool prepareToRenderSVGContent(RenderObject*, RenderObject::PaintInfo&, const FloatRect& boundingBox, SVGResourceFilter*&, SVGResourceFilter* rootFilter = 0); 49 static void finishRenderSVGContent(RenderObject*, RenderObject::PaintInfo&, SVGResourceFilter*&, GraphicsContext* savedContext); 50 51 // Layout all children of the passed render object 52 static void layoutChildren(RenderObject*, bool selfNeedsLayout); 53 54 // Helper function determining wheter overflow is hidden 55 static bool isOverflowHidden(const RenderObject*); 56 57 virtual FloatRect strokeBoundingBox() const { return FloatRect(); } 58 virtual FloatRect markerBoundingBox() const { return FloatRect(); } 59 60 // returns the bounding box of filter, clipper, marker and masker (or the empty rect if no filter) in local coordinates 61 FloatRect filterBoundingBoxForRenderer(const RenderObject*) const; 62 FloatRect clipperBoundingBoxForRenderer(const RenderObject*) const; 63 FloatRect maskerBoundingBoxForRenderer(const RenderObject*) const; 64 65 protected: 66 static IntRect clippedOverflowRectForRepaint(RenderObject*, RenderBoxModelObject* repaintContainer); 67 static void computeRectForRepaint(RenderObject*, RenderBoxModelObject* repaintContainer, IntRect&, bool fixed); 68 69 static void mapLocalToContainer(const RenderObject*, RenderBoxModelObject* repaintContainer, bool useTransforms, bool fixed, TransformState&); 70 71 // Used to share the "walk all the children" logic between objectBoundingBox 72 // and repaintRectInLocalCoordinates in RenderSVGRoot and RenderSVGContainer 73 static FloatRect computeContainerBoundingBox(const RenderObject* container, bool includeAllPaintedContent); 74 }; 75 76 // FIXME: This should move to RenderObject or PaintInfo 77 // Used for transforming the GraphicsContext and damage rect before passing PaintInfo to child renderers. 78 void applyTransformToPaintInfo(RenderObject::PaintInfo&, const AffineTransform& localToChildTransform); 79 80 // This offers a way to render parts of a WebKit rendering tree into a ImageBuffer. 81 void renderSubtreeToImage(ImageBuffer*, RenderObject*); 82 83 void clampImageBufferSizeToViewport(FrameView*, IntSize& imageBufferSize); 84 } // namespace WebCore 85 86 #endif // ENABLE(SVG) 87 88 #endif // SVGRenderBase_h 89
