Add QtPdf to cmake build

Port QtPdf to Qt6:

  * QtPdf,QtPdfWidgets,QtPdfQuick libs
  * QtPdfQuickPlugin, QtPdfPlugin (imageformat) plugins
  * widget and quick examples
  * qtpdf tests

To fit gn cmake integration and new repo layout code is a bit
reshuffled.

Compared to qmke build following features are not ported yet:

  * ios fat libs
  * qtbase 3rdparty static dependencies

WebEngine build can be skipped with setting
QT_FEATURE_qtwebengine_build=OFF

Note this patch needs follow up for 6.2 branch to disable qtpdf
builds by default, since this should not part of qt 6.2 release.

Task-number: QTBUG-95353
Change-Id: I4dd9f3934bdd478fb6d2fa686074a24d91f09953
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
(cherry picked from commit 79d04aa9e3e9aa84d7378260519f9e9a6759dc41)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 74 insertions, 0 deletions

diff --git a/src/pdf/plugins/imageformats/pdf/main.cpp b/src/pdf/plugins/imageformats/pdf/main.cpp
new file mode 100644
index 000000000..b4d59353c
--- /dev/null
+++ b/src/pdf/plugins/imageformats/pdf/main.cpp
@@ -0,0 +1,74 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtPDF module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qpdfiohandler_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class QPdfPlugin : public QImageIOPlugin
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID QImageIOHandlerFactoryInterface_iid FILE "pdf.json")
+
+public:
+    Capabilities capabilities(QIODevice *device, const QByteArray &format) const override;
+    QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const override;
+};
+
+QImageIOPlugin::Capabilities QPdfPlugin::capabilities(QIODevice *device, const QByteArray &format) const
+{
+    if (format == "pdf")
+        return Capabilities(CanRead);
+    if (!format.isEmpty())
+        return {};
+
+    Capabilities cap;
+    if (device->isReadable() && QPdfIOHandler::canRead(device))
+        cap |= CanRead;
+    return cap;
+}
+
+QImageIOHandler *QPdfPlugin::create(QIODevice *device, const QByteArray &format) const
+{
+    QPdfIOHandler *hand = new QPdfIOHandler();
+    hand->setDevice(device);
+    hand->setFormat(format);
+    return hand;
+}
+
+QT_END_NAMESPACE
+
+#include "main.moc"