doc: Add the QtPDF Licenses and Attributions section

Fixes: QTBUG-88482
Pick-to: 6.5
Change-Id: If58a8443afb38f372ca3dc7372472db888586dba
Reviewed-by: Michal Klocek <michal.klocek@qt.io>

5 files changed, 53 insertions, 0 deletions

diff --git a/src/pdf/CMakeLists.txt b/src/pdf/CMakeLists.txt
index e85270075..492a5893c 100644
--- a/src/pdf/CMakeLists.txt
+++ b/src/pdf/CMakeLists.txt
@@ -43,6 +43,10 @@ qt_internal_add_module(Pdf
 
 add_subdirectory(plugins/imageformats/pdf)
 
+get_install_config(config)
+get_architectures(archs)
+list(GET archs 0 arch)
+
 ##
 #  PDF DOCS
 ##
@@ -51,6 +55,15 @@ qt_internal_add_docs(Pdf
     doc/qtpdf.qdocconf
 )
 
+add_code_attributions_target(
+    TARGET generate_pdf_attributions
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/pdf_attributions.qdoc
+    GN_TARGET :QtPdf
+    FILE_TEMPLATE doc/about_credits.tmpl
+    ENTRY_TEMPLATE doc/about_credits_entry.tmpl
+    BUILDDIR ${buildDir}/${config}/${arch}
+)
+add_dependencies(docs generate_pdf_attributions)
 
 ##
 #   TOOLCHAIN SETUP
diff --git a/src/pdf/doc/about_credits.tmpl b/src/pdf/doc/about_credits.tmpl
new file mode 100644
index 000000000..57fae9e78
--- /dev/null
+++ b/src/pdf/doc/about_credits.tmpl
@@ -0,0 +1 @@
+{{entries}}
diff --git a/src/pdf/doc/about_credits_entry.tmpl b/src/pdf/doc/about_credits_entry.tmpl
new file mode 100644
index 000000000..294198709
--- /dev/null
+++ b/src/pdf/doc/about_credits_entry.tmpl
@@ -0,0 +1,13 @@
+/*!
+\page qtpdf-3rdparty-{{name-sanitized}}.html
+\attribution
+\ingroup qtpdf-licensing
+\brief {{license-type}}
+\title {{name}}
+
+\l{{{url}}}{Project Homepage}
+
+\badcode
+{{license}}
+\endcode
+*/
diff --git a/src/pdf/doc/src/qtpdf-index.qdoc b/src/pdf/doc/src/qtpdf-index.qdoc
index 07c151f47..fb44eb5fa 100644
--- a/src/pdf/doc/src/qtpdf-index.qdoc
+++ b/src/pdf/doc/src/qtpdf-index.qdoc
@@ -64,4 +64,12 @@
         \li \l{Qt PDF C++ Classes}
         \li \l{Qt Quick PDF QML Types}
     \endlist
+
+    \section1 Licenses and Attributions
+
+    Qt PDF is available under commercial licenses from \l{The Qt Company}.
+    In addition, it is available under the
+    \l{GNU Lesser General Public License, version 3}, or
+    the \l{GNU General Public License, version 2}.
+    See \l{Qt PDF Licensing} for further details about this module.
 */
diff --git a/src/pdf/doc/src/qtpdf-licensing.qdoc b/src/pdf/doc/src/qtpdf-licensing.qdoc
new file mode 100644
index 000000000..190ee8331
--- /dev/null
+++ b/src/pdf/doc/src/qtpdf-licensing.qdoc
@@ -0,0 +1,18 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
+
+/*!
+    \group qtpdf-licensing
+    \title Qt PDF Licensing
+
+    Qt PDF is available under commercial licenses from \l{The Qt Company}.
+    In addition, it is available under the
+    \l{GNU Lesser General Public License, version 3}, or
+    the \l{GNU General Public License, version 2}.
+    See \l{Qt Licensing} for further details.
+
+    The module includes a snapshot of PDFium.  As such, users need to respect
+    the licenses of PDFium and third-party code included in it.
+
+    Third party licenses included in the sources are:
+*/