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textoverlay: Optimize a bit more

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...and add a FIXME for bug #598695 and explain
what we should do once Pango supports user fonts.
This commit is contained in:
Sebastian Dröge 2009-10-22 10:17:31 +02:00
parent f63643bd54
commit eb9acba08f
1 changed files with 15 additions and 5 deletions
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20
ext/pango/gsttextoverlay.c
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@ -1245,27 +1245,37 @@ gst_text_overlay_render_pangocairo (GstTextOverlay * overlay,
/* apply transformations */
cairo_set_matrix (cr, &cairo_matrix);
/* draw text to cairo path */
pango_cairo_layout_path (cr, overlay->layout);
/* FIXME: We use show_layout everywhere except for the surface
* because it's really faster and internally does all kinds of
* caching. Unfortunately we have to paint to a cairo path for
* the outline and this is slow. Once Pango supports user fonts
* we should use them, see
* https://bugzilla.gnome.org/show_bug.cgi?id=598695
*
* Idea would the be, to create a cairo user font that
* does shadow, outline, text painting in the
* render_glyph function.
*/
/* draw shadow text */
cairo_save (cr);
cairo_translate (cr, overlay->shadow_offset, overlay->shadow_offset);
cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
cairo_fill_preserve (cr);
pango_cairo_show_layout (cr, overlay->layout);
cairo_restore (cr);
/* draw outline text */
cairo_save (cr);
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
cairo_set_line_width (cr, overlay->outline_offset);
cairo_stroke_preserve (cr);
pango_cairo_layout_path (cr, overlay->layout);
cairo_stroke (cr);
cairo_restore (cr);
/* draw text */
cairo_save (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_fill (cr);
pango_cairo_show_layout (cr, overlay->layout);
cairo_restore (cr);
cairo_destroy (cr);