Added code for Resize Transparency with Cairo drawing. Added code to

2006-07-10  Rajeev ramanathan <rajeevramanathan_2004@yahoo.co.in>

Added code for Resize Transparency with Cairo drawing.
Added code to render ECell and EText text items with
antialiasing, hinting and sub-pixel ordering with cairo.

svn path=/trunk/; revision=32270

1 files changed, 67 insertions, 2 deletions

diff --git a/widgets/text/e-text.c b/widgets/text/e-text.c
index 75332cdd8a..50e75dd8f4 100644
--- a/widgets/text/e-text.c
+++ b/widgets/text/e-text.c
@@ -388,6 +388,53 @@ reset_layout_attrs (EText *text)
 	calc_height (text);
 }
 
+static cairo_font_options_t *
+get_font_options ()
+{
+	char *antialiasing, *hinting, *subpixel_order;
+	cairo_font_options_t *font_options = cairo_font_options_create ();
+
+	/* Antialiasing */
+	antialiasing = gconf_client_get_string (gconf_client_get_default (),
+			"/desktop/gnome/font_rendering/antialiasing", NULL);
+	if (strcmp (antialiasing, "grayscale") == 0)
+		cairo_font_options_set_antialias (font_options, CAIRO_ANTIALIAS_GRAY);
+	else if (strcmp (antialiasing, "rgba") == 0)
+		cairo_font_options_set_antialias (font_options, CAIRO_ANTIALIAS_SUBPIXEL);
+	else if (strcmp (antialiasing, "none") == 0)
+		cairo_font_options_set_antialias (font_options, CAIRO_ANTIALIAS_NONE);
+	else
+		cairo_font_options_set_antialias (font_options, CAIRO_ANTIALIAS_DEFAULT);
+
+	hinting = gconf_client_get_string (gconf_client_get_default (),
+			"/desktop/gnome/font_rendering/hinting", NULL);
+	if (strcmp (hinting, "full") == 0)
+		cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_FULL);
+	else if (strcmp (hinting, "medium") == 0)
+		cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_MEDIUM);
+	else if (strcmp (hinting, "slight") == 0)
+		cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_SLIGHT);
+	else if (strcmp (hinting, "none") == 0)
+		cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE);
+	else
+		cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_DEFAULT);
+
+	subpixel_order = gconf_client_get_string (gconf_client_get_default (),
+			"/desktop/gnome/font_rendering/rgba_order", NULL);
+	if (strcmp (subpixel_order, "rgb") == 0)
+		cairo_font_options_set_subpixel_order (font_options, CAIRO_SUBPIXEL_ORDER_RGB);
+	else if (strcmp (subpixel_order, "bgr") == 0)
+		cairo_font_options_set_subpixel_order (font_options, CAIRO_SUBPIXEL_ORDER_BGR);
+	else if (strcmp (subpixel_order, "vrgb") == 0)
+		cairo_font_options_set_subpixel_order (font_options, CAIRO_SUBPIXEL_ORDER_VRGB);
+	else if (strcmp (subpixel_order, "vbgr") == 0)
+		cairo_font_options_set_subpixel_order (font_options, CAIRO_SUBPIXEL_ORDER_VBGR);
+	else
+		cairo_font_options_set_subpixel_order (font_options, CAIRO_SUBPIXEL_ORDER_DEFAULT);
+
+	return font_options;
+}
+
 static void
 create_layout (EText *text)
 {
@@ -405,12 +452,30 @@ create_layout (EText *text)
 static void
 reset_layout (EText *text)
 {
+	GnomeCanvasItem *item = GNOME_CANVAS_ITEM (text);
+	cairo_font_options_t *font_options;
+	PangoContext *context;
+
 	if (text->layout == NULL) {
 		create_layout (text);
 	}
 	else {
-		pango_layout_set_text (text->layout, text->text, -1);
-		reset_layout_attrs (text);
+		context = pango_layout_get_context (text->layout);
+
+		font_options = get_font_options();
+		pango_cairo_context_set_font_options (context, font_options);
+		cairo_font_options_destroy (font_options);
+		pango_layout_context_changed (text->layout);
+
+		text->font_desc = pango_font_description_new ();
+		pango_font_description_set_size (text->font_desc, 
+			pango_font_description_get_size ((GTK_WIDGET (item->canvas))->style->font_desc));
+		pango_font_description_set_family (text->font_desc,
+			pango_font_description_get_family ((GTK_WIDGET (item->canvas))->style->font_desc));
+		pango_layout_set_font_description (text->layout, text->font_desc);
+
+ 		pango_layout_set_text (text->layout, text->text, -1);
+ 		reset_layout_attrs (text);
 	}
 
 	if (!text->button_down) {