1 /** 2 * Copyright (C) 2007 Rob Buis <buis@kde.org> 3 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org> 4 * Copyright (C) 2007 Eric Seidel <eric@webkit.org> 5 * Copyright (C) 2009 Google, Inc. All rights reserved. 6 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public License 19 * along with this library; see the file COPYING.LIB. If not, write to 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 */ 23 24 #ifndef SVGRenderSupport_h 25 #define SVGRenderSupport_h 26 27 #if ENABLE(SVG) 28 #include "PaintInfo.h" 29 30 namespace WebCore { 31 32 class FloatPoint; 33 class FloatRect; 34 class ImageBuffer; 35 class RenderBoxModelObject; 36 class RenderObject; 37 class RenderStyle; 38 class RenderSVGRoot; 39 class TransformState; 40 41 // SVGRendererSupport is a helper class sharing code between all SVG renderers. 42 class SVGRenderSupport { 43 public: 44 // Used by all SVG renderers who apply clip/filter/etc. resources to the renderer content 45 static bool prepareToRenderSVGContent(RenderObject*, PaintInfo&); 46 static void finishRenderSVGContent(RenderObject*, PaintInfo&, GraphicsContext* savedContext); 47 48 // Shares child layouting code between RenderSVGRoot/RenderSVG(Hidden)Container 49 static void layoutChildren(RenderObject*, bool selfNeedsLayout); 50 51 // Helper function determining wheter overflow is hidden 52 static bool isOverflowHidden(const RenderObject*); 53 54 // Calculates the repaintRect in combination with filter, clipper and masker in local coordinates. 55 static void intersectRepaintRectWithResources(const RenderObject*, FloatRect&); 56 57 // Determines whether the passed point lies in a clipping area 58 static bool pointInClippingArea(RenderObject*, const FloatPoint&); 59 60 static void computeContainerBoundingBoxes(const RenderObject* container, FloatRect& objectBoundingBox, FloatRect& strokeBoundingBox, FloatRect& repaintBoundingBox); 61 static bool paintInfoIntersectsRepaintRect(const FloatRect& localRepaintRect, const AffineTransform& localTransform, const PaintInfo&); 62 63 // Important functions used by nearly all SVG renderers centralizing coordinate transformations / repaint rect calculations 64 static IntRect clippedOverflowRectForRepaint(RenderObject*, RenderBoxModelObject* repaintContainer); 65 static void computeRectForRepaint(RenderObject*, RenderBoxModelObject* repaintContainer, IntRect&, bool fixed); 66 static void mapLocalToContainer(const RenderObject*, RenderBoxModelObject* repaintContainer, bool useTransforms, bool fixed, TransformState&); 67 68 // Shared between SVG renderers and resources. 69 static void applyStrokeStyleToContext(GraphicsContext*, const RenderStyle*, const RenderObject*); 70 71 // FIXME: These methods do not belong here. 72 static const RenderSVGRoot* findTreeRootObject(const RenderObject*); 73 74 private: 75 // This class is not constructable. 76 SVGRenderSupport(); 77 ~SVGRenderSupport(); 78 }; 79 80 } // namespace WebCore 81 82 #endif // ENABLE(SVG) 83 #endif // SVGRenderSupport_h 84