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      1 /*
      2  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #ifndef RenderSVGResourcePattern_h
     22 #define RenderSVGResourcePattern_h
     23 
     24 #include "core/platform/graphics/FloatRect.h"
     25 #include "core/platform/graphics/ImageBuffer.h"
     26 #include "core/platform/graphics/Pattern.h"
     27 #include "core/platform/graphics/transforms/AffineTransform.h"
     28 #include "core/rendering/svg/RenderSVGResourceContainer.h"
     29 #include "core/svg/PatternAttributes.h"
     30 #include "core/svg/SVGPatternElement.h"
     31 #include "core/svg/SVGUnitTypes.h"
     32 
     33 #include "wtf/HashMap.h"
     34 #include "wtf/OwnPtr.h"
     35 
     36 namespace WebCore {
     37 
     38 struct PatternData {
     39     WTF_MAKE_FAST_ALLOCATED;
     40 public:
     41     RefPtr<Pattern> pattern;
     42     AffineTransform transform;
     43 };
     44 
     45 class RenderSVGResourcePattern FINAL : public RenderSVGResourceContainer {
     46 public:
     47     RenderSVGResourcePattern(SVGPatternElement*);
     48 
     49     virtual const char* renderName() const { return "RenderSVGResourcePattern"; }
     50 
     51     virtual void removeAllClientsFromCache(bool markForInvalidation = true);
     52     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true);
     53 
     54     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode);
     55     virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short resourceMode, const Path*, const RenderSVGShape*);
     56     virtual FloatRect resourceBoundingBox(RenderObject*) { return FloatRect(); }
     57 
     58     virtual RenderSVGResourceType resourceType() const { return s_resourceType; }
     59     static RenderSVGResourceType s_resourceType;
     60 
     61 private:
     62     bool buildTileImageTransform(RenderObject*, const PatternAttributes&, const SVGPatternElement*, FloatRect& patternBoundaries, AffineTransform& tileImageTransform) const;
     63 
     64     PassOwnPtr<ImageBuffer> createTileImage(const PatternAttributes&, const FloatRect& tileBoundaries,
     65                                             const FloatRect& absoluteTileBoundaries, const AffineTransform& tileImageTransform,
     66                                             FloatRect& clampedAbsoluteTileBoundaries) const;
     67 
     68     PatternData* buildPattern(RenderObject*, unsigned short resourceMode);
     69 
     70     bool m_shouldCollectPatternAttributes : 1;
     71     PatternAttributes m_attributes;
     72     HashMap<RenderObject*, OwnPtr<PatternData> > m_patternMap;
     73 };
     74 
     75 }
     76 
     77 #endif
     78