1/* 2 * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20#ifndef RenderSVGResourceMarker_h 21#define RenderSVGResourceMarker_h 22 23#include "core/rendering/svg/RenderSVGResourceContainer.h" 24#include "core/svg/SVGElement.h" 25#include "core/svg/SVGMarkerElement.h" 26#include "platform/geometry/FloatRect.h" 27#include "wtf/HashSet.h" 28 29namespace blink { 30 31class RenderObject; 32 33class RenderSVGResourceMarker FINAL : public RenderSVGResourceContainer { 34public: 35 explicit RenderSVGResourceMarker(SVGMarkerElement*); 36 virtual ~RenderSVGResourceMarker(); 37 38 virtual const char* renderName() const OVERRIDE { return "RenderSVGResourceMarker"; } 39 40 virtual void removeAllClientsFromCache(bool markForInvalidation = true) OVERRIDE; 41 virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) OVERRIDE; 42 43 void draw(PaintInfo&, const AffineTransform&); 44 45 // Calculates marker boundaries, mapped to the target element's coordinate space 46 FloatRect markerBoundaries(const AffineTransform& markerTransformation) const; 47 48 virtual void applyViewportClip(PaintInfo&) OVERRIDE; 49 virtual void layout() OVERRIDE; 50 virtual void calcViewport() OVERRIDE; 51 52 virtual const AffineTransform& localToParentTransform() const OVERRIDE; 53 AffineTransform markerTransformation(const FloatPoint& origin, float angle, float strokeWidth) const; 54 55 virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short) OVERRIDE { return false; } 56 57 FloatPoint referencePoint() const; 58 float angle() const; 59 SVGMarkerUnitsType markerUnits() const { return toSVGMarkerElement(element())->markerUnits()->currentValue()->enumValue(); } 60 SVGMarkerOrientType orientType() const { return toSVGMarkerElement(element())->orientType()->currentValue()->enumValue(); } 61 62 virtual RenderSVGResourceType resourceType() const OVERRIDE { return s_resourceType; } 63 static const RenderSVGResourceType s_resourceType; 64 65private: 66 // Generates a transformation matrix usable to render marker content. Handles scaling the marker content 67 // acording to SVGs markerUnits="strokeWidth" concept, when a strokeWidth value != -1 is passed in. 68 AffineTransform markerContentTransformation(const AffineTransform& contentTransformation, const FloatPoint& origin, float strokeWidth = -1) const; 69 70 AffineTransform viewportTransform() const; 71 72 mutable AffineTransform m_localToParentTransform; 73 FloatRect m_viewport; 74}; 75 76DEFINE_RENDER_SVG_RESOURCE_TYPE_CASTS(RenderSVGResourceMarker, MarkerResourceType); 77 78} 79 80#endif 81