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      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 RenderSVGResource_h
     21 #define RenderSVGResource_h
     22 
     23 #if ENABLE(SVG)
     24 #include "RenderStyleConstants.h"
     25 #include "SVGDocumentExtensions.h"
     26 
     27 namespace WebCore {
     28 
     29 enum RenderSVGResourceType {
     30     MaskerResourceType,
     31     MarkerResourceType,
     32     PatternResourceType,
     33     LinearGradientResourceType,
     34     RadialGradientResourceType,
     35     SolidColorResourceType,
     36     FilterResourceType,
     37     ClipperResourceType
     38 };
     39 
     40 enum RenderSVGResourceMode {
     41     ApplyToDefaultMode = 1 << 0, // used for all resources except gradient/pattern
     42     ApplyToFillMode    = 1 << 1,
     43     ApplyToStrokeMode  = 1 << 2,
     44     ApplyToTextMode    = 1 << 3 // used in combination with ApplyTo{Fill|Stroke}Mode
     45 };
     46 
     47 class Color;
     48 class FloatRect;
     49 class GraphicsContext;
     50 class Path;
     51 class RenderObject;
     52 class RenderStyle;
     53 class RenderSVGResourceSolidColor;
     54 
     55 class RenderSVGResource {
     56 public:
     57     RenderSVGResource() { }
     58     virtual ~RenderSVGResource() { }
     59 
     60     virtual void removeAllClientsFromCache(bool markForInvalidation = true) = 0;
     61     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) = 0;
     62 
     63     virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) = 0;
     64     virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short, const Path*) { }
     65     virtual FloatRect resourceBoundingBox(RenderObject*) = 0;
     66 
     67     virtual RenderSVGResourceType resourceType() const = 0;
     68 
     69     template<class Renderer>
     70     Renderer* cast()
     71     {
     72         if (Renderer::s_resourceType == resourceType())
     73             return static_cast<Renderer*>(this);
     74 
     75         return 0;
     76     }
     77 
     78     // Helper utilities used in the render tree to access resources used for painting shapes/text (gradients & patterns & solid colors only)
     79     static RenderSVGResource* fillPaintingResource(RenderObject*, const RenderStyle*, Color& fallbackColor);
     80     static RenderSVGResource* strokePaintingResource(RenderObject*, const RenderStyle*, Color& fallbackColor);
     81     static RenderSVGResourceSolidColor* sharedSolidPaintingResource();
     82 
     83     static void markForLayoutAndParentResourceInvalidation(RenderObject*, bool needsLayout = true);
     84 };
     85 
     86 }
     87 
     88 #endif
     89 #endif
     90