1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/*
* Copyright (C) 2011, Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "WidgetBackingStoreGtkX11.h"
#include "CairoUtilities.h"
#include "GtkVersioning.h"
#include "RefPtrCairo.h"
#include <cairo-xlib.h>
#include <cairo.h>
#include <gdk/gdkx.h>
namespace WebCore {
PassOwnPtr<WidgetBackingStore> WidgetBackingStoreGtkX11::create(GtkWidget* widget, const IntSize& size, float deviceScaleFactor)
{
return adoptPtr(new WidgetBackingStoreGtkX11(widget, size, deviceScaleFactor));
}
WidgetBackingStoreGtkX11::WidgetBackingStoreGtkX11(GtkWidget* widget, const IntSize& size, float deviceScaleFactor)
: WidgetBackingStore(size, deviceScaleFactor)
{
IntSize scaledSize = size;
scaledSize.scale(deviceScaleFactor);
GdkVisual* visual = gtk_widget_get_visual(widget);
GdkScreen* screen = gdk_visual_get_screen(visual);
m_display = GDK_SCREEN_XDISPLAY(screen);
m_pixmap = XCreatePixmap(m_display, GDK_WINDOW_XID(gdk_screen_get_root_window(screen)),
scaledSize.width(), scaledSize.height(), gdk_visual_get_depth(visual));
m_gc = XCreateGC(m_display, m_pixmap, 0, 0);
m_surface = adoptRef(cairo_xlib_surface_create(m_display, m_pixmap,
GDK_VISUAL_XVISUAL(visual), scaledSize.width(), scaledSize.height()));
cairoSurfaceSetDeviceScale(m_surface.get(), deviceScaleFactor, deviceScaleFactor);
}
WidgetBackingStoreGtkX11::~WidgetBackingStoreGtkX11()
{
// The pixmap needs to exist when the surface is destroyed, so begin by clearing it.
m_surface.clear();
XFreePixmap(m_display, m_pixmap);
XFreeGC(m_display, m_gc);
}
cairo_surface_t* WidgetBackingStoreGtkX11::cairoSurface()
{
return m_surface.get();
}
void WidgetBackingStoreGtkX11::scroll(const IntRect& scrollRect, const IntSize& scrollOffset)
{
IntRect targetRect(scrollRect);
targetRect.move(scrollOffset);
targetRect.intersect(scrollRect);
if (targetRect.isEmpty())
return;
targetRect.scale(m_deviceScaleFactor);
IntSize scaledScrollOffset = scrollOffset;
scaledScrollOffset.scale(m_deviceScaleFactor);
cairo_surface_flush(m_surface.get());
XCopyArea(m_display, m_pixmap, m_pixmap, m_gc,
targetRect.x() - scaledScrollOffset.width(), targetRect.y() - scaledScrollOffset.height(),
targetRect.width(), targetRect.height(),
targetRect.x(), targetRect.y());
cairo_surface_mark_dirty_rectangle(m_surface.get(),
targetRect.x(), targetRect.y(),
targetRect.width(), targetRect.height());
}
} // namespace WebCore
|
