blob: 6032f22111857a12c2d6f616232acb00b23991ee (
plain)
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
|
// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "printer_worker.h"
#include "printing/pdfium_document_wrapper_qt.h"
#include <QPainter>
#include <QPagedPaintDevice>
namespace QtWebEngineCore {
PrinterWorker::PrinterWorker(QSharedPointer<QByteArray> data, QPagedPaintDevice *device)
: m_data(data), m_device(device)
{
}
PrinterWorker::~PrinterWorker() { }
void PrinterWorker::print()
{
if (!m_data->size()) {
qWarning("Failed to print: Print result data is empty.");
Q_EMIT resultReady(false);
return;
}
PdfiumDocumentWrapperQt pdfiumWrapper(m_data->constData(), m_data->size());
const int fromPage = m_firstPageFirst ? 0 : pdfiumWrapper.pageCount() - 1;
const int toPage = m_firstPageFirst ? pdfiumWrapper.pageCount() : -1;
int pageCopies = 1;
if (m_collateCopies) {
pageCopies = m_documentCopies;
m_documentCopies = 1;
}
qreal resolution = m_deviceResolution / 72.0; // pdfium uses points so 1/72 inch
QPainter painter;
for (int printedDocuments = 0; printedDocuments < m_documentCopies; printedDocuments++) {
if (printedDocuments > 0)
m_device->newPage();
for (int i = fromPage; i != toPage; m_firstPageFirst ? i++ : i--) {
QSizeF documentSize = (pdfiumWrapper.pageSize(i) * resolution);
bool isLandscape = documentSize.width() > documentSize.height();
m_device->setPageOrientation(isLandscape ? QPageLayout::Landscape
: QPageLayout::Portrait);
QRectF paintRect = m_device->pageLayout().paintRectPixels(m_deviceResolution);
documentSize = documentSize.scaled(paintRect.size(), Qt::KeepAspectRatio);
// setPageOrientation has to be called before qpainter.begin() or before
// qprinter.newPage() so correct metrics is used, therefore call begin now for only
// first page
if (!painter.isActive() && !painter.begin(m_device)) {
qWarning("Failure to print on device: Could not open printer for painting.");
Q_EMIT resultReady(false);
return;
}
if (i != fromPage)
m_device->newPage();
for (int printedPages = 0; printedPages < pageCopies; printedPages++) {
if (printedPages > 0)
m_device->newPage();
QImage currentImage =
pdfiumWrapper.pageAsQImage(i, documentSize.width(), documentSize.height());
if (currentImage.isNull()) {
Q_EMIT resultReady(false);
return;
}
painter.drawImage(0, 0, currentImage);
}
}
}
painter.end();
Q_EMIT resultReady(true);
return;
}
} // namespace QtWebEngineCore
|
