From 6c32927f8cf226b8158dd25f4b92a6853dadb8b6 Mon Sep 17 00:00:00 2001
From: Tobias Koenig <tobias.koenig@kdab.com>
Date: Tue, 14 Feb 2017 10:11:19 +0100
Subject: Improve PDF/A-1b support in QPdfWriter

Add new enum QPrinter::PdfVersion to switch QPdfWriter
into PDF/A-1b mode. In that mode
    - meta data are embedded in XMP format
    - a color profile for sRGB is embedded and an OutputIntent defined
    - the ID key is added to the document trailer dictionary
    - a CIDSet entry is added to the font descriptor
    - transparency is removed from pens, brushes and images

Change-Id: Ia8a24d83609b239e716aefc1ba05f07320dbd290
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
---
 src/printsupport/kernel/qprintengine_pdf.cpp |  4 +++-
 src/printsupport/kernel/qprintengine_pdf_p.h |  2 +-
 src/printsupport/kernel/qprinter.cpp         | 33 +++++++++++++++++++++++++++-
 src/printsupport/kernel/qprinter.h           |  3 +++
 src/printsupport/kernel/qprinter_p.h         |  4 +++-
 5 files changed, 42 insertions(+), 4 deletions(-)

(limited to 'src/printsupport/kernel')

diff --git a/src/printsupport/kernel/qprintengine_pdf.cpp b/src/printsupport/kernel/qprintengine_pdf.cpp
index 278bb044e1..080ff7ccf4 100644
--- a/src/printsupport/kernel/qprintengine_pdf.cpp
+++ b/src/printsupport/kernel/qprintengine_pdf.cpp
@@ -58,10 +58,12 @@
 
 QT_BEGIN_NAMESPACE
 
-QPdfPrintEngine::QPdfPrintEngine(QPrinter::PrinterMode m)
+QPdfPrintEngine::QPdfPrintEngine(QPrinter::PrinterMode m, QPdfEngine::PdfVersion version)
     : QPdfEngine(*new QPdfPrintEnginePrivate(m))
 {
     state = QPrinter::Idle;
+
+    setPdfVersion(version);
 }
 
 QPdfPrintEngine::QPdfPrintEngine(QPdfPrintEnginePrivate &p)
diff --git a/src/printsupport/kernel/qprintengine_pdf_p.h b/src/printsupport/kernel/qprintengine_pdf_p.h
index b964885bbf..e9e81bdf68 100644
--- a/src/printsupport/kernel/qprintengine_pdf_p.h
+++ b/src/printsupport/kernel/qprintengine_pdf_p.h
@@ -83,7 +83,7 @@ class Q_PRINTSUPPORT_EXPORT QPdfPrintEngine : public QPdfEngine, public QPrintEn
 {
     Q_DECLARE_PRIVATE(QPdfPrintEngine)
 public:
-    QPdfPrintEngine(QPrinter::PrinterMode m);
+    QPdfPrintEngine(QPrinter::PrinterMode m, QPdfEngine::PdfVersion version = QPdfEngine::Version_1_4);
     virtual ~QPdfPrintEngine();
 
     // reimplementations QPaintEngine
diff --git a/src/printsupport/kernel/qprinter.cpp b/src/printsupport/kernel/qprinter.cpp
index 53bed87dfc..638187c614 100644
--- a/src/printsupport/kernel/qprinter.cpp
+++ b/src/printsupport/kernel/qprinter.cpp
@@ -147,7 +147,8 @@ void QPrinterPrivate::initEngines(QPrinter::OutputFormat format, const QPrinterI
         printEngine = ps->createNativePrintEngine(printerMode);
         paintEngine = ps->createPaintEngine(printEngine, printerMode);
     } else {
-        QPdfPrintEngine *pdfEngine = new QPdfPrintEngine(printerMode);
+        const auto pdfEngineVersion = (pdfVersion == QPrinter::PdfVersion_1_4 ? QPdfEngine::Version_1_4 : QPdfEngine::Version_A1b);
+        QPdfPrintEngine *pdfEngine = new QPdfPrintEngine(printerMode, pdfEngineVersion);
         paintEngine = pdfEngine;
         printEngine = pdfEngine;
     }
@@ -685,7 +686,37 @@ QPrinter::OutputFormat QPrinter::outputFormat() const
     return d->outputFormat;
 }
 
+/*!
+    \since 5.10
+
+    Sets the PDF version for this printer to \a version.
+
+    If \a version is the same value as currently set then no change will be made.
+*/
+void QPrinter::setPdfVersion(PdfVersion version)
+{
+    Q_D(QPrinter);
+
+    if (d->pdfVersion == version)
+        return;
+
+    d->pdfVersion = version;
 
+    if (d->outputFormat == QPrinter::PdfFormat) {
+        d->changeEngines(d->outputFormat, QPrinterInfo());
+    }
+}
+
+/*!
+    \since 5.10
+
+    Returns the PDF version for this printer. The default is \c PdfVersion_1_4.
+*/
+QPrinter::PdfVersion QPrinter::pdfVersion() const
+{
+    Q_D(const QPrinter);
+    return d->pdfVersion;
+}
 
 /*! \internal
 */
diff --git a/src/printsupport/kernel/qprinter.h b/src/printsupport/kernel/qprinter.h
index 33a2d4dbc8..bfe2d346ae 100644
--- a/src/printsupport/kernel/qprinter.h
+++ b/src/printsupport/kernel/qprinter.h
@@ -134,6 +134,9 @@ public:
     void setOutputFormat(OutputFormat format);
     OutputFormat outputFormat() const;
 
+    void setPdfVersion(PdfVersion version);
+    PdfVersion pdfVersion() const;
+
     void setPrinterName(const QString &);
     QString printerName() const;
 
diff --git a/src/printsupport/kernel/qprinter_p.h b/src/printsupport/kernel/qprinter_p.h
index 18dfad926c..8f962ea051 100644
--- a/src/printsupport/kernel/qprinter_p.h
+++ b/src/printsupport/kernel/qprinter_p.h
@@ -75,7 +75,8 @@ class Q_PRINTSUPPORT_EXPORT QPrinterPrivate
     Q_DECLARE_PUBLIC(QPrinter)
 public:
     QPrinterPrivate(QPrinter *printer)
-        : printEngine(0),
+        : pdfVersion(QPrinter::PdfVersion_1_4),
+          printEngine(0),
           paintEngine(0),
           realPrintEngine(0),
           realPaintEngine(0),
@@ -107,6 +108,7 @@ public:
 
     QPrinter::PrinterMode printerMode;
     QPrinter::OutputFormat outputFormat;
+    QPrinter::PdfVersion pdfVersion;
     QPrintEngine *printEngine;
     QPaintEngine *paintEngine;
 
-- 
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