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textoverlay: added 'shadow' option to control whether text gets a shadow

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This commit is contained in:
Lane Brooks 2011-01-20 00:42:39 -07:00 committed by Sebastian Dröge
parent 2ba4a56d74
commit c8a3f63909
2 changed files with 28 additions and 5 deletions
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32
ext/pango/gsttextoverlay.c
View file

@ -95,6 +95,7 @@ GST_DEBUG_CATEGORY (pango_debug);
#define DEFAULT_PROP_TEXT ""
#define DEFAULT_PROP_SHADING FALSE
#define DEFAULT_PROP_SHADOW TRUE
#define DEFAULT_PROP_VALIGNMENT GST_TEXT_OVERLAY_VALIGN_BASELINE
#define DEFAULT_PROP_HALIGNMENT GST_TEXT_OVERLAY_HALIGN_CENTER
#define DEFAULT_PROP_VALIGN "baseline"
@ -185,6 +186,7 @@ enum
PROP_AUTO_ADJUST_SIZE,
PROP_VERTICAL_RENDER,
PROP_COLOR,
PROP_SHADOW,
PROP_LAST
};
@ -418,6 +420,17 @@ gst_text_overlay_class_init (GstTextOverlayClass * klass)
g_param_spec_boolean ("shaded-background", "shaded background",
"Whether to shade the background under the text area",
DEFAULT_PROP_SHADING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstTextOverlay:shadow
*
* Whether to display a shadow of each letter under the text.
*
* Since: 0.10.35
**/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SHADOW,
g_param_spec_boolean ("shadow", "create shadow of text",
"Whether to create a shadow of the letters under the text",
DEFAULT_PROP_SHADOW, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_VALIGNMENT,
g_param_spec_enum ("valignment", "vertical alignment",
"Vertical alignment of the text", GST_TYPE_TEXT_OVERLAY_VALIGN,
@ -655,6 +668,7 @@ gst_text_overlay_init (GstTextOverlay * overlay, GstTextOverlayClass * klass)
overlay->wrap_mode = DEFAULT_PROP_WRAP_MODE;
overlay->want_shading = DEFAULT_PROP_SHADING;
overlay->want_shadow = DEFAULT_PROP_SHADOW;
overlay->shading_value = DEFAULT_SHADING_VALUE;
overlay->silent = DEFAULT_PROP_SILENT;
overlay->wait_text = DEFAULT_PROP_WAIT_TEXT;
@ -798,6 +812,9 @@ gst_text_overlay_set_property (GObject * object, guint prop_id,
case PROP_SHADING:
overlay->want_shading = g_value_get_boolean (value);
break;
case PROP_SHADOW:
overlay->want_shadow = g_value_get_boolean (value);
break;
case PROP_XPAD:
overlay->xpad = g_value_get_int (value);
break;
@ -926,6 +943,9 @@ gst_text_overlay_get_property (GObject * object, guint prop_id,
case PROP_SHADING:
g_value_set_boolean (value, overlay->want_shading);
break;
case PROP_SHADOW:
g_value_set_boolean (value, overlay->want_shadow);
break;
case PROP_XPAD:
g_value_set_int (value, overlay->xpad);
break;
@ -1374,11 +1394,13 @@ gst_text_overlay_render_pangocairo (GstTextOverlay * overlay,
*/
/* 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);
pango_cairo_show_layout (cr, overlay->layout);
cairo_restore (cr);
if (overlay->want_shadow) {
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);
pango_cairo_show_layout (cr, overlay->layout);
cairo_restore (cr);
}
/* draw outline text */
cairo_save (cr);

1
ext/pango/gsttextoverlay.h
View file

@ -140,6 +140,7 @@ struct _GstTextOverlay {
PangoLayout *layout;
gdouble shadow_offset;
gboolean want_shadow;
gdouble outline_offset;
guchar *text_image;
gint image_width;