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:
RenderSVGResource()57     RenderSVGResource() { }
~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;
postApplyResource(RenderObject *,GraphicsContext * &,unsigned short,const Path *)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>
cast()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