1/*
2 * Copyright (C) 2011 Igalia S.L.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef PlatformContextCairo_h
27#define PlatformContextCairo_h
28
29#if USE(CAIRO)
30
31#include "GraphicsContext.h"
32#include "RefPtrCairo.h"
33
34namespace WebCore {
35
36class GraphicsContextPlatformPrivate;
37struct GraphicsContextState;
38
39namespace Cairo {
40struct FillSource;
41struct StrokeSource;
42struct ShadowState;
43}
44
45// Much like PlatformContextSkia in the Skia port, this class holds information that
46// would normally be private to GraphicsContext, except that we want to allow access
47// to it in Font and Image code. This allows us to separate the concerns of Cairo-specific
48// code from the platform-independent GraphicsContext.
49
50class PlatformContextCairo {
51 WTF_MAKE_NONCOPYABLE(PlatformContextCairo);
52public:
53 PlatformContextCairo(cairo_t*);
54 ~PlatformContextCairo();
55
56 cairo_t* cr() { return m_cr.get(); }
57 void setCr(cairo_t* cr) { m_cr = cr; }
58
59 GraphicsContextPlatformPrivate* graphicsContextPrivate() { return m_graphicsContextPrivate; }
60 void setGraphicsContextPrivate(GraphicsContextPlatformPrivate* graphicsContextPrivate) { m_graphicsContextPrivate = graphicsContextPrivate; }
61
62 Vector<float>& layers() { return m_layers; }
63
64 void save();
65 void restore();
66
67 void pushImageMask(cairo_surface_t*, const FloatRect&);
68
69private:
70 RefPtr<cairo_t> m_cr;
71
72 // Keeping a pointer to GraphicsContextPlatformPrivate here enables calling
73 // Windows-specific methods from CairoOperations (where only PlatformContextCairo
74 // can be leveraged).
75 GraphicsContextPlatformPrivate* m_graphicsContextPrivate { nullptr };
76
77 class State;
78 State* m_state;
79 WTF::Vector<State> m_stateStack;
80
81 // Transparency layers.
82 Vector<float> m_layers;
83};
84
85} // namespace WebCore
86
87#endif // USE(CAIRO)
88
89#endif // PlatformContextCairo_h
90