1/*
2 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
3 * Copyright (C) 2007 Alp Toker <alp@atoker.com>
4 * Copyright (C) 2008 Brent Fulgham <bfulgham@gmail.com>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef GraphicsContextPlatformPrivateCairo_h
29#define GraphicsContextPlatformPrivateCairo_h
30
31#include "GraphicsContext.h"
32
33#include "PlatformContextCairo.h"
34#include "RefPtrCairo.h"
35#include <cairo.h>
36#include <math.h>
37#include <stdio.h>
38#include <wtf/MathExtras.h>
39
40#if PLATFORM(GTK)
41#include <pango/pango.h>
42typedef struct _GdkExposeEvent GdkExposeEvent;
43#elif PLATFORM(WIN)
44#include <cairo-win32.h>
45#endif
46
47namespace WebCore {
48
49class GraphicsContextPlatformPrivate {
50public:
51    GraphicsContextPlatformPrivate(PlatformContextCairo* newPlatformContext)
52        : platformContext(newPlatformContext)
53#if PLATFORM(GTK)
54        , expose(0)
55#endif
56#if PLATFORM(WIN) || (PLATFORM(GTK) && OS(WINDOWS))
57        // NOTE:  These may note be needed: review and remove once Cairo implementation is complete
58        , m_hdc(0)
59        , m_shouldIncludeChildWindows(false)
60#endif
61    {
62    }
63
64    virtual ~GraphicsContextPlatformPrivate()
65    {
66    }
67
68#if PLATFORM(WIN)
69    // On Windows, we need to update the HDC for form controls to draw in the right place.
70    void save();
71    void restore();
72    void flush();
73    void clip(const FloatRect&);
74    void clip(const Path&);
75    void scale(const FloatSize&);
76    void rotate(float);
77    void translate(float, float);
78    void concatCTM(const AffineTransform&);
79    void setCTM(const AffineTransform&);
80    void syncContext(cairo_t* cr);
81#else
82    // On everything else, we do nothing.
83    void save() {}
84    void restore() {}
85    void flush() {}
86    void clip(const FloatRect&) {}
87    void clip(const Path&) {}
88    void scale(const FloatSize&) {}
89    void rotate(float) {}
90    void translate(float, float) {}
91    void concatCTM(const AffineTransform&) {}
92    void setCTM(const AffineTransform&) {}
93    void syncContext(cairo_t*) { }
94#endif
95
96    PlatformContextCairo* platformContext;
97    Vector<float> layers;
98
99#if PLATFORM(GTK)
100    GdkEventExpose* expose;
101#endif
102#if PLATFORM(WIN) || (PLATFORM(GTK) && OS(WINDOWS))
103    HDC m_hdc;
104    bool m_shouldIncludeChildWindows;
105#endif
106};
107
108// This is a specialized private section for the Cairo GraphicsContext, which knows how
109// to clean up the heap allocated PlatformContextCairo that we must use for the top-level
110// GraphicsContext.
111class GraphicsContextPlatformPrivateToplevel : public GraphicsContextPlatformPrivate {
112public:
113    GraphicsContextPlatformPrivateToplevel(PlatformContextCairo* platformContext)
114        : GraphicsContextPlatformPrivate(platformContext)
115    {
116    }
117
118    virtual ~GraphicsContextPlatformPrivateToplevel()
119    {
120        delete platformContext;
121    }
122};
123
124
125} // namespace WebCore
126
127#endif // GraphicsContextPlatformPrivateCairo_h
128