C++ (Cpp) DocumentView::limitArea Examples

Example #1

File: RenderJob.cpp Project: wbrenna/xournalpp

void RenderJob::rerenderRectangle(RenderJob * renderJob, Rectangle * rect) {
	XOJ_CHECK_TYPE_OBJ(renderJob, RenderJob);

	PageView * view = renderJob->view;
	double zoom = view->xournal->getZoom();
	Document * doc = view->xournal->getDocument();

	doc->lock();

	double pageWidth = view->page.getWidth();
	double pageHeight = view->page.getHeight();

	doc->unlock();

	int x = rect->x * zoom;
	int y = rect->y * zoom;
	int width = rect->width * zoom;
	int height = rect->height * zoom;

	cairo_surface_t * rectBuffer = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
	cairo_t * crRect = cairo_create(rectBuffer);
	cairo_translate(crRect, -x, -y);
	cairo_scale(crRect, zoom, zoom);

	DocumentView v;
	v.limitArea(rect->x, rect->y, rect->width, rect->height);

	if (view->page.getBackgroundType() == BACKGROUND_TYPE_PDF) {
		int pgNo = view->page.getPdfPageNr();
		XojPopplerPage * popplerPage = doc->getPdfPage(pgNo);
		PdfCache * cache = view->xournal->getCache();
		PdfView::drawPage(cache, popplerPage, crRect, zoom, pageWidth, pageHeight);
	}

	doc->lock();
	v.drawPage(view->page, crRect, false);
	doc->unlock();

	cairo_destroy(crRect);

	g_mutex_lock(view->drawingMutex);
	cairo_t * crPageBuffer = cairo_create(view->crBuffer);

	cairo_set_operator(crPageBuffer, CAIRO_OPERATOR_SOURCE);
	cairo_set_source_surface(crPageBuffer, rectBuffer, x, y);
	cairo_rectangle(crPageBuffer, x, y, width, height);
	cairo_fill(crPageBuffer);

	cairo_destroy(crPageBuffer);

	cairo_surface_destroy(rectBuffer);

	g_mutex_unlock(view->drawingMutex);
}