Prepare to export without background

src/pdf/base/XojCairoPdfExport.cpp

@@ -11,7 +11,8 @@ XojCairoPdfExport::XojCairoPdfExport(Document* doc, ProgressListener* progressLi
  : doc(doc),
    progressListener(progressListener),
    surface(NULL),
-   cr(NULL)
+   cr(NULL),
+   noBackgroundExport(false)
 {
     XOJ_INIT_TYPE(XojCairoPdfExport);
 }
@@ -28,6 +29,15 @@ XojCairoPdfExport::~XojCairoPdfExport()
     XOJ_RELEASE_TYPE(XojCairoPdfExport);
 }
 
+/**
+ * Export without background
+ */
+void XojCairoPdfExport::setNoBackgroundExport(bool noBackgroundExport)
+{
+	XOJ_CHECK_TYPE(XojCairoPdfExport);
+	this->noBackgroundExport = noBackgroundExport;
+}
+
 bool XojCairoPdfExport::startPdf(path file)
 {
 	XOJ_CHECK_TYPE(XojCairoPdfExport);
@@ -63,7 +73,7 @@ void XojCairoPdfExport::exportPage(size_t page)
 
 	DocumentView view;
 
-	if (p->getBackgroundType().isPdfPage())
+	if (p->getBackgroundType().isPdfPage() && !noBackgroundExport)
 	{
 		int pgNo = p->getPdfPageNr();
 		XojPdfPageSPtr popplerPage = doc->getPdfPage(pgNo);
@@ -71,7 +81,7 @@ void XojCairoPdfExport::exportPage(size_t page)
 		popplerPage->render(cr, true);
 	}
 
-	view.drawPage(p, this->cr, true /* dont render eraseable */);
+	view.drawPage(p, this->cr, true /* dont render eraseable */, noBackgroundExport);
 
 	// next page
 	cairo_show_page(this->cr);

src/pdf/base/XojCairoPdfExport.h

@@ -27,6 +27,11 @@ public:
 	virtual bool createPdf(path file, PageRangeVector& range);
 	virtual string getLastError();
 
+	/**
+	 * Export without background
+	 */
+	virtual void setNoBackgroundExport(bool noBackgroundExport);
+
 private:
 	bool startPdf(path file);
 	void endPdf();
@@ -41,6 +46,8 @@ private:
 	cairo_surface_t* surface;
 	cairo_t* cr;
 
+	bool noBackgroundExport;
+
 	string lastError;
 };
 

src/pdf/base/XojPdfExport.cpp

@@ -9,3 +9,12 @@ XojPdfExport::~XojPdfExport()
 {
     XOJ_RELEASE_TYPE(XojPdfExport);
 }
+
+/**
+ * Export without background
+ */
+void XojPdfExport::setNoBackgroundExport(bool noBackgroundExport)
+{
+	XOJ_CHECK_TYPE(XojPdfExport);
+	// Does nothing in the base class
+}

src/pdf/base/XojPdfExport.h

@@ -31,6 +31,11 @@ public:
 	virtual bool createPdf(path file, PageRangeVector& range) = 0;
 	virtual string getLastError() = 0;
 
+	/**
+	 * Export without background
+	 */
+	virtual void setNoBackgroundExport(bool noBackgroundExport);
+
 private:
 	XOJ_TYPE_ATTRIB;
 };

src/view/DocumentView.cpp

@@ -457,13 +457,18 @@ void DocumentView::drawBackground()
  * @param page The page to draw
  * @param cr Draw to thgis context
  * @param dontRenderEditingStroke false to draw currently drawing stroke
+ * @param hideBackground true to hide the background
  */
-void DocumentView::drawPage(PageRef page, cairo_t* cr, bool dontRenderEditingStroke)
+void DocumentView::drawPage(PageRef page, cairo_t* cr, bool dontRenderEditingStroke, bool hideBackground)
 {
 	XOJ_CHECK_TYPE(DocumentView);
 
 	initDrawing(page, cr, dontRenderEditingStroke);
-	drawBackground();
+
+	if (!hideBackground)
+	{
+		drawBackground();
+	}
 
 	int layer = 0;
 	for (Layer* l : *page->getLayers())

src/view/DocumentView.h

@@ -40,8 +40,9 @@ public:
 	 * @param page The page to draw
 	 * @param cr Draw to thgis context
 	 * @param dontRenderEditingStroke false to draw currently drawing stroke
+	 * @param hideBackground true to hide the background
 	 */
-	void drawPage(PageRef page, cairo_t* cr, bool dontRenderEditingStroke);
+	void drawPage(PageRef page, cairo_t* cr, bool dontRenderEditingStroke, bool hideBackground = false);