[geany/geany] 1fe7b4: Fix printing under Windows

[Colomban Wendling]

Branch:      refs/heads/master
Author:      Colomban Wendling <ban at herbesfolles.org>
Committer:   Colomban Wendling <ban at herbesfolles.org>
Date:        Tue, 20 Aug 2013 09:51:45 UTC
Commit:      1fe7b4848ee47e7cc198082ccb49bb398a6bfb21
             https://github.com/geany/geany/commit/1fe7b4848ee47e7cc198082ccb49bb398a6bfb21

Log Message:
-----------
Fix printing under Windows

For some reason the Scintilla widget's Pango context don't have a
resolution set on Windows, so we get an invalid one.  Fix this by
correctly peek the resolution from the map if the context doesn't
have one by itself.

https://developer.gnome.org/pango/stable/pango-Cairo-Rendering.html#pango-cairo-context-get-resolution

Thanks to Matthew Brush for debugging this!

Closes #961.


Modified Paths:
--------------
    src/printing.c

Modified: src/printing.c
14 files changed, 12 insertions(+), 2 deletions(-)
===================================================================
@@ -334,6 +334,7 @@ static void begin_print(GtkPrintOperation *operation, GtkPrintContext *context,
 	DocInfo *dinfo = user_data;
 	PangoContext *pango_ctx, *widget_pango_ctx;
 	PangoFontDescription *desc;
+	gdouble pango_res, widget_res;
 
 	if (dinfo == NULL)
 		return;
@@ -358,9 +359,18 @@ static void begin_print(GtkPrintOperation *operation, GtkPrintContext *context,
 	 * Pango context out of the Cairo target, and the resolution is in the GtkPrintOperation's
 	 * Pango context */
 	pango_ctx = gtk_print_context_create_pango_context(context);
-	widget_pango_ctx = gtk_widget_get_pango_context(GTK_WIDGET(dinfo->sci));
-	dinfo->sci_scale = pango_cairo_context_get_resolution(pango_ctx) / pango_cairo_context_get_resolution(widget_pango_ctx);
+	pango_res = pango_cairo_context_get_resolution(pango_ctx);
 	g_object_unref(pango_ctx);
+	widget_pango_ctx = gtk_widget_get_pango_context(GTK_WIDGET(dinfo->sci));
+	widget_res = pango_cairo_context_get_resolution(widget_ctx);
+	/* On Windows, for some reason the widget's resolution is -1, so follow
+	 * Pango docs and peek the font map's one. */
+	if (widget_res < 0)
+	{
+		widget_res = pango_cairo_font_map_get_resolution(
+			(PangoCairoFontMap*) pango_context_get_font_map(widget_pango_ctx));
+	}
+	dinfo->sci_scale = pango_res / widget_res;
 
 	dinfo->pages = g_array_new(FALSE, FALSE, sizeof(gint));
 



--------------
This E-Mail was brought to you by github_commit_mail.py (Source: https://github.com/geany/infrastructure).