add a setting to enable/disable pdfMerger use

resources/etc/OpenBoard.config

@@ -129,6 +129,7 @@ ExportBackgroundColor=false
 Margin=20
 PageFormat=A4
 Resolution=300
+UsePDFMerger=true
 ZoomBehavior=4
 
 [Podcast]

src/adaptors/UBExportFullPDF.cpp

@@ -82,6 +82,18 @@ void UBExportFullPDF::saveOverlayPdf(UBDocumentProxy* pDocumentProxy, const QStr
     if (!pDocumentProxy || filename.length() == 0 || pDocumentProxy->pageCount() == 0)
         return;
 
+    /*
+        PDFMerger is supposed to be working only for PDFs using 1.0 to 1.4 standard, but I encountered no issue using 1.7 documents.
+        Just tested with a few documents though so it could be a total mess to restore it without any possibility to disable it if an issue is encountered
+        A new setting is introduced to handle that possibility.
+        Also, calling simpleExporter here instead of the following code was done because I (wrongly) assumed that both codes was doing nearly the same thing, as I never
+        tested to remove the part of pdf-merger throwing an exception if pdf version is > 1.4 and that calling the following lines without modifying the version check
+        throws an exception and finally calls simpleExporter->persistsDocument
+        calling simpleExporter directly also resulted in fixing two issues where pdf overlay could be badly scaled (not matching with scale of annotations)
+    */
+    bool usePDFMerger = UBSettings::settings()->pdfUsePDFMerger->get().toBool();
+    if (usePDFMerger)
+    {
         //PDF
         qDebug() << "exporting document to PDF Merger" << filename;
         QPrinter pdfPrinter;
@@ -144,6 +156,11 @@ void UBExportFullPDF::saveOverlayPdf(UBDocumentProxy* pDocumentProxy, const QStr
 
         if (pdfPainter) delete pdfPainter;
     }
+    else
+    {
+        mSimpleExporter->persistsDocument(pDocumentProxy, filename);
+    }
+}
 
 
 void UBExportFullPDF::persist(UBDocumentProxy* pDocumentProxy)

src/core/UBSettings.cpp

@@ -405,6 +405,7 @@ void UBSettings::init()
 
     pdfMargin = new UBSetting(this, "PDF", "Margin", "20");
     pdfPageFormat = new UBSetting(this, "PDF", "PageFormat", "A4");
+    pdfUsePDFMerger = new UBSetting(this, "PDF", "UsePDFMerger", "true");
     pdfResolution = new UBSetting(this, "PDF", "Resolution", "300");
 
     pdfZoomBehavior = new UBSetting(this, "PDF", "ZoomBehavior", "4");

src/core/UBSettings.h

@@ -357,6 +357,7 @@ class UBSettings : public QObject
         UBSetting* svgViewBoxMargin;
         UBSetting* pdfMargin;
         UBSetting* pdfPageFormat;
+        UBSetting* pdfUsePDFMerger;
         UBSetting* pdfResolution;
 
         UBSetting* pdfZoomBehavior;