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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "UBThumbnailAdaptor.h"
#include <QtCore>
#include "frameworks/UBFileSystemUtils.h"
#include "core/UBPersistenceManager.h"
#include "core/UBApplication.h"
#include "core/UBSettings.h"
#include "document/UBDocumentProxy.h"
#include "domain/UBGraphicsScene.h"
#include "UBSvgSubsetAdaptor.h"
#include "core/memcheck.h"
UBThumbnailAdaptor::UBThumbnailAdaptor(QObject *parent)
: QObject(parent)
{
// NOOP
}
UBThumbnailAdaptor::~UBThumbnailAdaptor()
{
// NOOP
}
QList<QPixmap> UBThumbnailAdaptor::load(UBDocumentProxy* proxy)
{
QList<QPixmap> thumbnails;
if (!proxy || proxy->persistencePath().size() == 0)
return thumbnails;
//compatibility with older formats (<= 4.0.b.2.0) : generate missing thumbnails
int existingPageCount = proxy->pageCount();
QString thumbFileName = proxy->persistencePath() +
UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", existingPageCount);
QFile thumbFile(thumbFileName);
if (!thumbFile.exists())
{
bool displayMessage = (existingPageCount > 5);
int thumbCount = 0;
for(int i = 0 ; i < existingPageCount; i++)
{
UBGraphicsScene* scene = UBSvgSubsetAdaptor::loadScene(proxy, i);
if (scene)
{
thumbCount++;
if (displayMessage && thumbCount == 1)
UBApplication::showMessage(tr("Generating preview thumbnails ..."));
persistScene(proxy->persistencePath(), scene, i);
}
}
if (displayMessage && thumbCount > 0)
UBApplication::showMessage(tr("%1 thumbnails generated ...").arg(thumbCount));
}
//end compatibility with older format
bool moreToProcess = true;
int pageCount = 0;
while (moreToProcess) {
pageCount++;
QString fileName = proxy->persistencePath() +
UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", pageCount);
QFile file(fileName);
if (file.exists()) {
QPixmap pix;
//Warning. Works only with modified Qt
#ifdef Q_WS_X11
pix.load(fileName, 0, Qt::AutoColor);
#else
pix.load(fileName, 0, Qt::AutoColor, false);
#endif
thumbnails.append(pix);
} else {
moreToProcess = false;
}
}
return thumbnails;
}
void UBThumbnailAdaptor::persistScene(const QString& pDocPath, UBGraphicsScene* pScene, const int pageIndex, const bool overrideModified)
{
QString fileName = pDocPath + UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", pageIndex + 1);
QFile thumbFile(fileName);
if (pScene->isModified() || overrideModified || !thumbFile.exists())
{
qreal nominalWidth = pScene->nominalSize().width();
qreal nominalHeight = pScene->nominalSize().height();
qreal ratio = nominalWidth / nominalHeight;
QRectF sceneRect = pScene->normalizedSceneRect(ratio);
qreal width = UBSettings::maxThumbnailWidth;
qreal height = width / ratio;
QImage thumb(width, height, QImage::Format_ARGB32);
QRectF imageRect(0, 0, width, height);
QPainter painter(&thumb);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
if (pScene->isDarkBackground())
{
painter.fillRect(imageRect, Qt::black);
}
else
{
painter.fillRect(imageRect, Qt::white);
}
pScene->setRenderingContext(UBGraphicsScene::NonScreen);
pScene->setRenderingQuality(UBItem::RenderingQualityHigh);
pScene->render(&painter, imageRect, sceneRect, Qt::KeepAspectRatio);
pScene->setRenderingContext(UBGraphicsScene::Screen);
pScene->setRenderingQuality(UBItem::RenderingQualityNormal);
thumb.scaled(width, height, Qt::KeepAspectRatio, Qt::SmoothTransformation).save(fileName, "JPG");
}
}
QUrl UBThumbnailAdaptor::thumbnailUrl(UBDocumentProxy* proxy, const int pageIndex)
{
QString fileName = proxy->persistencePath() +
UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", pageIndex + 1);
return QUrl::fromLocalFile(fileName);
}