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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: bitmapbackbuffer.cxx,v $
*
* $Revision: 1.5 $
*
* last change: $Author: kz $ $Date: 2005-11-02 12:57:20 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#include "bitmapbackbuffer.hxx"
#include <osl/mutex.hxx>
#include <vos/mutex.hxx>
#include <vcl/svapp.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/bmpacc.hxx>
namespace vclcanvas
{
BitmapBackBuffer::BitmapBackBuffer( const BitmapEx& rBitmap,
const OutputDevice& rRefDevice ) :
maBitmap( rBitmap ),
mpVDev( NULL ),
mrRefDevice( rRefDevice ),
mbBitmapContentIsCurrent( false ),
mbVDevContentIsCurrent( false )
{
}
BitmapBackBuffer::~BitmapBackBuffer()
{
// make sure solar mutex is held on deletion (other methods
// are supposed to be called with already locked solar mutex)
::vos::OGuard aGuard( Application::GetSolarMutex() );
if( mpVDev )
delete mpVDev;
}
OutputDevice& BitmapBackBuffer::getOutDev()
{
createVDev();
updateVDev();
return *mpVDev;
}
const OutputDevice& BitmapBackBuffer::getOutDev() const
{
createVDev();
updateVDev();
return *mpVDev;
}
VirtualDevice& BitmapBackBuffer::getVirDev()
{
createVDev();
updateVDev();
return *mpVDev;
}
const VirtualDevice& BitmapBackBuffer::getVirDev() const
{
createVDev();
updateVDev();
return *mpVDev;
}
BitmapEx& BitmapBackBuffer::getBitmapReference()
{
OSL_ENSURE( !mbBitmapContentIsCurrent || !mbVDevContentIsCurrent,
"BitmapBackBuffer::getBitmapReference(): Both bitmap and VDev are valid?!" );
if( mbVDevContentIsCurrent && mpVDev )
{
// VDev content is more current than bitmap - copy contents before!
mpVDev->EnableMapMode( FALSE );
const Point aEmptyPoint;
*maBitmap = mpVDev->GetBitmapEx( aEmptyPoint,
mpVDev->GetOutputSizePixel() );
}
// client queries bitmap, and will possibly alter content -
// next time, VDev needs to be updated
mbBitmapContentIsCurrent = true;
mbVDevContentIsCurrent = false;
return *maBitmap;
}
void BitmapBackBuffer::createVDev() const
{
if( !mpVDev )
{
// VDev not yet created, do it now. Create an alpha-VDev,
// if bitmap has transparency.
mpVDev = maBitmap->IsTransparent() ?
new VirtualDevice( mrRefDevice, 0, 0 ) :
new VirtualDevice( mrRefDevice );
OSL_ENSURE( mpVDev,
"BitmapBackBuffer::createVDev(): Unable to create VirtualDevice" );
mpVDev->SetOutputSizePixel( maBitmap->GetSizePixel() );
}
}
void BitmapBackBuffer::updateVDev() const
{
OSL_ENSURE( !mbBitmapContentIsCurrent || !mbVDevContentIsCurrent,
"BitmapBackBuffer::updateVDev(): Both bitmap and VDev are valid?!" );
if( mpVDev && mbBitmapContentIsCurrent )
{
// fill with bitmap content
mpVDev->EnableMapMode( FALSE );
const Point aEmptyPoint;
mpVDev->DrawBitmapEx( aEmptyPoint, *maBitmap );
}
// canvas queried the VDev, and will possibly paint into
// it. Next time, bitmap must be updated
mbBitmapContentIsCurrent = false;
mbVDevContentIsCurrent = true;
}
}
|
