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textoverlay: added 'outline-color' parameter to control whether text gets a shadow

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This commit is contained in:
Lane Brooks 2011-01-20 00:52:50 -07:00 committed by Sebastian Dröge
parent c8a3f63909
commit 5488877090
2 changed files with 28 additions and 2 deletions
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28
ext/pango/gsttextoverlay.c
View file

@ -114,6 +114,7 @@ GST_DEBUG_CATEGORY (pango_debug);
#define DEFAULT_PROP_AUTO_ADJUST_SIZE TRUE
#define DEFAULT_PROP_VERTICAL_RENDER FALSE
#define DEFAULT_PROP_COLOR 0xffffffff
#define DEFAULT_PROP_OUTLINE_COLOR 0xff000000
/* make a property of me */
#define DEFAULT_SHADING_VALUE -80
@ -187,6 +188,7 @@ enum
PROP_VERTICAL_RENDER,
PROP_COLOR,
PROP_SHADOW,
PROP_OUTLINE_COLOR,
PROP_LAST
};
@ -511,6 +513,18 @@ gst_text_overlay_class_init (GstTextOverlayClass * klass)
"Color to use for text (big-endian ARGB).", 0, G_MAXUINT32,
DEFAULT_PROP_COLOR,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
/**
* GstTextOverlay:outline-color
*
* Color of the outline of the rendered text.
*
* Since: 0.10.35
**/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_OUTLINE_COLOR,
g_param_spec_uint ("outline-color", "Text Outline Color",
"Color to use for outline the text (big-endian ARGB).", 0,
G_MAXUINT32, DEFAULT_PROP_OUTLINE_COLOR,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
/**
* GstTextOverlay:line-alignment
@ -656,6 +670,7 @@ gst_text_overlay_init (GstTextOverlay * overlay, GstTextOverlayClass * klass)
gst_text_overlay_adjust_values_with_fontdesc (overlay, desc);
overlay->color = DEFAULT_PROP_COLOR;
overlay->outline_color = DEFAULT_PROP_OUTLINE_COLOR;
overlay->halign = DEFAULT_PROP_HALIGNMENT;
overlay->valign = DEFAULT_PROP_VALIGNMENT;
overlay->xpad = DEFAULT_PROP_XPAD;
@ -896,6 +911,9 @@ gst_text_overlay_set_property (GObject * object, guint prop_id,
case PROP_COLOR:
overlay->color = g_value_get_uint (value);
break;
case PROP_OUTLINE_COLOR:
overlay->outline_color = g_value_get_uint (value);
break;
case PROP_SILENT:
overlay->silent = g_value_get_boolean (value);
break;
@ -991,6 +1009,9 @@ gst_text_overlay_get_property (GObject * object, guint prop_id,
case PROP_COLOR:
g_value_set_uint (value, overlay->color);
break;
case PROP_OUTLINE_COLOR:
g_value_set_uint (value, overlay->outline_color);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -1402,9 +1423,14 @@ gst_text_overlay_render_pangocairo (GstTextOverlay * overlay,
cairo_restore (cr);
}
a = (overlay->outline_color >> 24) & 0xff;
r = (overlay->outline_color >> 16) & 0xff;
g = (overlay->outline_color >> 8) & 0xff;
b = (overlay->outline_color >> 0) & 0xff;
/* draw outline text */
cairo_save (cr);
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
cairo_set_source_rgba (cr, r / 255.0, g / 255.0, b / 255.0, a / 255.0);
cairo_set_line_width (cr, overlay->outline_offset);
pango_cairo_layout_path (cr, overlay->layout);
cairo_stroke (cr);

2
ext/pango/gsttextoverlay.h
View file

@ -136,7 +136,7 @@ struct _GstTextOverlay {
gboolean want_shading;
gboolean silent;
gboolean wait_text;
guint color;
guint color, outline_color;
PangoLayout *layout;
gdouble shadow_offset;