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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/***************************************************************************
* Copyright (C) 2005 by Stefan Kebekus *
* kebekus@kde.org *
* *
* 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 2 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <config.h>
#include <kmessagebox.h>
#include <kdebug.h>
#include <klocale.h>
#include <tqfileinfo.h>
#include <tqpainter.h>
#include "documentWidget.h"
#include "faxrenderer.h"
#include "faxmultipage.h"
//#define KF_DEBUG
FaxRenderer::FaxRenderer(TQWidget* par)
: DocumentRenderer(par)
{
#ifdef KF_DEBUG
kdError() << "FaxRenderer( parent=" << par << " )" << endl;
#endif
}
FaxRenderer::~FaxRenderer()
{
#ifdef KF_DEBUG
kdDebug() << "~FaxRenderer" << endl;
#endif
// Wait for all access to this documentRenderer to finish
mutex.lock();
mutex.unlock();
}
void FaxRenderer::drawPage(double resolution, RenderedDocumentPage* page)
{
#ifdef KF_DEBUG
kdDebug() << "FaxRenderer::drawPage(documentPage*) called, page number " << page->getPageNumber() << endl;
#endif
// Paranoid safety checks
if (page == 0) {
kdError() << "FaxRenderer::drawPage(documentPage*) called with argument == 0" << endl;
return;
}
if (page->getPageNumber() == 0) {
kdError() << "FaxRenderer::drawPage(documentPage*) called for a documentPage with page number 0" << endl;
return;
}
// Wait for all access to this documentRenderer to finish
mutex.lock();
// more paranoid safety checks
if (page->getPageNumber() > numPages) {
kdError() << "FaxRenderer::drawPage(documentPage*) called for a documentPage with page number " << page->getPageNumber()
<< " but the current fax file has only " << numPages << " pages." << endl;
mutex.unlock();
return;
}
TQImage img = fax.page(page->getPageNumber() - 1);
SimplePageSize psize = pageSizes[page->getPageNumber() - 1];
if (psize.isValid()) {
TQPainter *foreGroundPaint = page->getPainter();
if (foreGroundPaint != 0) {
// Compute an image for the page.
// WARNING: It may be tempting to compute the image size in
// pixel, using page->height() and page->width(). DON'T DO
// THAT. KViewShell uses transformations e.g. to rotate the
// page, and sets the argument 'resolution' accordingly. Similar
// problems occur if KViewShell required a shrunken version of
// the page, e.g. to print multiple pages on one sheet of paper.
int width_in_pixel = tqRound(resolution * psize.width().getLength_in_inch());
int height_in_pixel = tqRound(resolution * psize.height().getLength_in_inch());
img = img.smoothScale(width_in_pixel, height_in_pixel);
foreGroundPaint->drawImage(0, 0, img);
page->returnPainter(foreGroundPaint);
}
} else
kdError() << "FaxRenderer::drawPage() called, but page size for page " << page->getPageNumber() << " is invalid." << endl;
// To indicate that the page was drawn, we set the appropriate flas in the page structure
page->isEmpty = false;
mutex.unlock();
}
bool FaxRenderer::setFile(const TQString &fname, const KURL &)
{
#ifdef KF_DEBUG
kdDebug() << "FaxRenderer::setFile(" << fname << ") called" << endl;
#endif
// Wait for all access to this documentRenderer to finish
mutex.lock();
// If fname is the empty string, then this means: "close".
if (fname.isEmpty()) {
kdDebug() << "FaxRenderer::setFile( ... ) called with empty filename. Closing the file." << endl;
mutex.unlock();
return true;
}
// Paranoid saftey checks: make sure the file actually exists, and
// that it is a file, not a directory. Otherwise, show an error
// message and exit..
TQFileInfo fi(fname);
TQString filename = fi.absFilePath();
if (!fi.exists() || fi.isDir()) {
KMessageBox::error( parentWidget,
i18n("<qt><strong>File error.</strong> The specified file '%1' does not exist.</qt>").tqarg(filename),
i18n("File Error"));
// the return value 'false' indicates that this operation was not successful.
mutex.unlock();
return false;
}
// Now we assume that the file is fine and load the file into the
// fax member. We abort on error and give an error message.
bool ok = fax.loadImage(filename);
// It can happen that fax.loadImage() returns with 'ok == true', but
// still the file could NOT be loaded. This happens, e.g. for TIFF
// file that do NOT contain FAX, but other image formats. We handle
// that case here also.
if ( (!ok) || (fax.numPages() == 0)) {
// Unfortunately, it can happen that fax.loadImage() fails WITHOUT
// leaving an error message in fax.errorString(). We try to handle
// this case gracefully.
if (fax.errorString().isEmpty())
KMessageBox::error( parentWidget,
i18n("<qt><strong>File error.</strong> The specified file '%1' could not be loaded.</qt>").tqarg(filename),
i18n("File Error"));
else
KMessageBox::detailedError( parentWidget,
i18n("<qt><strong>File error.</strong> The specified file '%1' could not be loaded.</qt>").tqarg(filename),
fax.errorString(),
i18n("File Error"));
clear();
mutex.unlock();
return false;
}
// Set the number of pages page sizes
numPages = fax.numPages();
// Set the page size for the first page in the pageSizes array.
// The rest of the page sizes will be calculated on demand by the drawPage function.
pageSizes.resize(numPages);
Length w,h;
if (numPages != 0) {
for(TQ_UINT16 pg=0; pg < numPages; pg++) {
TQSize pageSize = fax.page_size(pg);
TQPoint dpi = fax.page_dpi(pg);
double dpix = dpi.x();
double dpiy = dpi.y();
if (dpix*dpiy < 1.0) {
kdError() << "File invalid resolutions, dpi x = " << dpix << ", dpi y = " << dpiy << ". This information will be ignored and 75 DPI assumed." << endl;
dpix = dpiy = 75.0;
}
w.setLength_in_inch(pageSize.width() / dpix);
h.setLength_in_inch(pageSize.height() / dpiy);
pageSizes[pg].setPageSize(w, h);
}
}
// the return value 'true' indicates that this operation was not successful.
mutex.unlock();
return true;
}
#include "faxrenderer.moc"
|
