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      1 /*
      2  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2008 Eric Seidel <eric (at) webkit.org>
      4  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      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 #ifndef RenderSVGResourceGradient_h
     23 #define RenderSVGResourceGradient_h
     24 
     25 #include "core/rendering/svg/RenderSVGResourceContainer.h"
     26 #include "core/svg/SVGGradientElement.h"
     27 #include "platform/geometry/FloatRect.h"
     28 #include "platform/graphics/Gradient.h"
     29 #include "platform/graphics/ImageBuffer.h"
     30 #include "platform/transforms/AffineTransform.h"
     31 #include "wtf/HashMap.h"
     32 
     33 namespace WebCore {
     34 
     35 struct GradientData {
     36     WTF_MAKE_FAST_ALLOCATED;
     37 public:
     38     RefPtr<Gradient> gradient;
     39     AffineTransform userspaceTransform;
     40 };
     41 
     42 class GraphicsContext;
     43 
     44 class RenderSVGResourceGradient : public RenderSVGResourceContainer {
     45 public:
     46     explicit RenderSVGResourceGradient(SVGGradientElement*);
     47 
     48     virtual void removeAllClientsFromCache(bool markForInvalidation = true) OVERRIDE FINAL;
     49     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) OVERRIDE FINAL;
     50 
     51     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) OVERRIDE FINAL;
     52     virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short resourceMode, const Path*, const RenderSVGShape*) OVERRIDE FINAL;
     53 
     54 protected:
     55     void addStops(GradientData*, const Vector<Gradient::ColorStop>&) const;
     56 
     57     virtual SVGUnitTypes::SVGUnitType gradientUnits() const = 0;
     58     virtual void calculateGradientTransform(AffineTransform&) = 0;
     59     virtual bool collectGradientAttributes(SVGGradientElement*) = 0;
     60     virtual void buildGradient(GradientData*) const = 0;
     61 
     62     GradientSpreadMethod platformSpreadMethodFromSVGType(SVGSpreadMethodType) const;
     63 
     64 private:
     65     bool m_shouldCollectGradientAttributes : 1;
     66     HashMap<RenderObject*, OwnPtr<GradientData> > m_gradientMap;
     67 };
     68 
     69 }
     70 
     71 #endif
     72