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 "RenderSVGShape.h"
25#include "RenderStyleConstants.h"
26#include "SVGDocumentExtensions.h"
27
28namespace WebCore {
29
30enum RenderSVGResourceType {
31    MaskerResourceType,
32    MarkerResourceType,
33    PatternResourceType,
34    LinearGradientResourceType,
35    RadialGradientResourceType,
36    SolidColorResourceType,
37    FilterResourceType,
38    ClipperResourceType
39};
40
41// If this enum changes change the unsigned bitfields using it.
42enum RenderSVGResourceMode {
43    ApplyToDefaultMode = 1 << 0, // used for all resources except gradient/pattern
44    ApplyToFillMode    = 1 << 1,
45    ApplyToStrokeMode  = 1 << 2,
46    ApplyToTextMode    = 1 << 3 // used in combination with ApplyTo{Fill|Stroke}Mode
47};
48
49class Color;
50class FloatRect;
51class GraphicsContext;
52class Path;
53class RenderObject;
54class RenderStyle;
55class RenderSVGResourceSolidColor;
56
57class RenderSVGResource {
58public:
59    RenderSVGResource() { }
60    virtual ~RenderSVGResource() { }
61
62    virtual void removeAllClientsFromCache(bool markForInvalidation = true) = 0;
63    virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) = 0;
64
65    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) = 0;
66    virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short, const Path*, const RenderSVGShape*) { }
67    virtual FloatRect resourceBoundingBox(RenderObject*) = 0;
68
69    virtual RenderSVGResourceType resourceType() const = 0;
70
71    template<class Renderer>
72    Renderer* cast()
73    {
74        if (Renderer::s_resourceType == resourceType())
75            return static_cast<Renderer*>(this);
76
77        return 0;
78    }
79
80    // Helper utilities used in the render tree to access resources used for painting shapes/text (gradients & patterns & solid colors only)
81    static RenderSVGResource* fillPaintingResource(RenderObject*, const RenderStyle*, Color& fallbackColor);
82    static RenderSVGResource* strokePaintingResource(RenderObject*, const RenderStyle*, Color& fallbackColor);
83    static RenderSVGResourceSolidColor* sharedSolidPaintingResource();
84
85    static void markForLayoutAndParentResourceInvalidation(RenderObject*, bool needsLayout = true);
86};
87
88}
89
90#endif
91#endif
92