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
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <osl/diagnose.h>
#include <vcl/bitmapex.hxx>
#include <vcl/svapp.hxx>
#include "bitmapbackbuffer.hxx"
#include "impltools.hxx"
namespace vclcanvas
{
BitmapBackBuffer::BitmapBackBuffer( const BitmapEx& rBitmap,
const OutputDevice& rRefDevice ) :
maBitmap( rBitmap ),
mpVDev( nullptr ),
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)
SolarMutexGuard aGuard;
mpVDev.disposeAndClear();
}
OutputDevice& BitmapBackBuffer::getOutDev()
{
createVDev();
updateVDev();
return *mpVDev;
}
const OutputDevice& BitmapBackBuffer::getOutDev() const
{
createVDev();
updateVDev();
return *mpVDev;
}
void BitmapBackBuffer::clear()
{
// force current content to bitmap, make all transparent white
getBitmapReference().Erase(COL_TRANSPARENT);
}
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 );
mpVDev->SetAntialiasing( AntialiasingFlags::Enable );
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;
}
Size BitmapBackBuffer::getBitmapSizePixel() const
{
Size aSize = maBitmap->GetSizePixel();
if( mbVDevContentIsCurrent && mpVDev )
{
mpVDev->EnableMapMode( false );
mpVDev->SetAntialiasing( AntialiasingFlags::Enable );
aSize = mpVDev->GetOutputSizePixel();
}
return aSize;
}
void BitmapBackBuffer::createVDev() const
{
if( mpVDev )
return;
// VDev not yet created, do it now. Create an alpha-VDev,
// if bitmap has transparency.
mpVDev = maBitmap->IsAlpha() ?
VclPtr<VirtualDevice>::Create( mrRefDevice, DeviceFormat::WITH_ALPHA ) :
VclPtr<VirtualDevice>::Create( mrRefDevice );
OSL_ENSURE( mpVDev,
"BitmapBackBuffer::createVDev(): Unable to create VirtualDevice" );
mpVDev->SetOutputSizePixel( maBitmap->GetSizePixel() );
tools::SetDefaultDeviceAntiAliasing( mpVDev );
}
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 );
mpVDev->SetAntialiasing( AntialiasingFlags::Enable );
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;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
