1/*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 * (C) 2000 Antti Koivisto (koivisto@kde.org)
4 * (C) 2000 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24#pragma once
25
26#include "CSSValue.h"
27#include "FloatSize.h"
28#include "Image.h"
29#include <wtf/RefCounted.h>
30#include <wtf/RefPtr.h>
31#include <wtf/TypeCasts.h>
32
33namespace WebCore {
34
35class CachedImage;
36class CachedResourceLoader;
37class CSSValue;
38class RenderElement;
39class RenderObject;
40struct ResourceLoaderOptions;
41
42typedef const void* WrappedImagePtr;
43
44class StyleImage : public RefCounted<StyleImage> {
45public:
46 virtual ~StyleImage() = default;
47
48 virtual bool operator==(const StyleImage& other) const = 0;
49
50 virtual Ref<CSSValue> cssValue() const = 0;
51
52 virtual bool canRender(const RenderElement*, float /*multiplier*/) const { return true; }
53 virtual bool isPending() const = 0;
54 virtual void load(CachedResourceLoader&, const ResourceLoaderOptions&) = 0;
55 virtual bool isLoaded() const { return true; }
56 virtual bool errorOccurred() const { return false; }
57 virtual FloatSize imageSize(const RenderElement*, float multiplier) const = 0;
58 virtual void computeIntrinsicDimensions(const RenderElement*, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) = 0;
59 virtual bool imageHasRelativeWidth() const = 0;
60 virtual bool imageHasRelativeHeight() const = 0;
61 virtual bool usesImageContainerSize() const = 0;
62 virtual void setContainerContextForRenderer(const RenderElement&, const FloatSize&, float) = 0;
63 virtual void addClient(RenderElement*) = 0;
64 virtual void removeClient(RenderElement*) = 0;
65 virtual RefPtr<Image> image(RenderElement*, const FloatSize&) const = 0;
66 virtual WrappedImagePtr data() const = 0;
67 virtual float imageScaleFactor() const { return 1; }
68 virtual bool knownToBeOpaque(const RenderElement*) const = 0;
69 virtual CachedImage* cachedImage() const { return 0; }
70
71 ALWAYS_INLINE bool isCachedImage() const { return m_isCachedImage; }
72 ALWAYS_INLINE bool isGeneratedImage() const { return m_isGeneratedImage; }
73
74protected:
75 StyleImage()
76 : m_isCachedImage(false)
77 , m_isGeneratedImage(false)
78 {
79 }
80 bool m_isCachedImage : 1;
81 bool m_isGeneratedImage : 1;
82};
83
84} // namespace WebCore
85
86#define SPECIALIZE_TYPE_TRAITS_STYLE_IMAGE(ToClassName, predicate) \
87SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToClassName) \
88 static bool isType(const WebCore::StyleImage& image) { return image.predicate(); } \
89SPECIALIZE_TYPE_TRAITS_END()
90