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basetextoverlay: add "draw-shadow" and "draw-outline" properties

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=749823
This commit is contained in:
Lazar Claudiu 2015-05-27 12:20:19 +03:00 committed by Tim-Philipp Müller
parent 5df6cc074f
commit f5906122fb
2 changed files with 59 additions and 13 deletions
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69
ext/pango/gstbasetextoverlay.c
View file

@ -62,6 +62,8 @@ GST_DEBUG_CATEGORY (pango_debug);
#define DEFAULT_PROP_WAIT_TEXT TRUE
#define DEFAULT_PROP_AUTO_ADJUST_SIZE TRUE
#define DEFAULT_PROP_VERTICAL_RENDER FALSE
#define DEFAULT_PROP_DRAW_SHADOW TRUE
#define DEFAULT_PROP_DRAW_OUTLINE TRUE
#define DEFAULT_PROP_COLOR 0xffffffff
#define DEFAULT_PROP_OUTLINE_COLOR 0xff000000
#define DEFAULT_PROP_SHADING_VALUE 80
@ -91,7 +93,8 @@ enum
PROP_AUTO_ADJUST_SIZE,
PROP_VERTICAL_RENDER,
PROP_COLOR,
PROP_SHADOW,
PROP_DRAW_SHADOW,
PROP_DRAW_OUTLINE,
PROP_OUTLINE_COLOR,
PROP_LAST
};
@ -457,6 +460,30 @@ gst_base_text_overlay_class_init (GstBaseTextOverlayClass * klass)
"Whether to render the text string",
DEFAULT_PROP_SILENT,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
/**
* GstBaseTextOverlay:draw-shadow:
*
* If set, a text shadow is drawn.
*
* Since: 1.6
*/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DRAW_SHADOW,
g_param_spec_boolean ("draw-shadow", "draw-shadow",
"Whether to draw shadow",
DEFAULT_PROP_DRAW_SHADOW,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstBaseTextOverlay:draw-outline:
*
* If set, an outline is drawn.
*
* Since: 1.6
*/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DRAW_OUTLINE,
g_param_spec_boolean ("draw-outline", "draw-outline",
"Whether to draw outline",
DEFAULT_PROP_DRAW_OUTLINE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstBaseTextOverlay:wait-text:
*
@ -588,6 +615,8 @@ gst_base_text_overlay_init (GstBaseTextOverlay * overlay,
overlay->want_shading = DEFAULT_PROP_SHADING;
overlay->shading_value = DEFAULT_PROP_SHADING_VALUE;
overlay->silent = DEFAULT_PROP_SILENT;
overlay->draw_shadow = DEFAULT_PROP_DRAW_SHADOW;
overlay->draw_outline = DEFAULT_PROP_DRAW_OUTLINE;
overlay->wait_text = DEFAULT_PROP_WAIT_TEXT;
overlay->auto_adjust_size = DEFAULT_PROP_AUTO_ADJUST_SIZE;
@ -909,6 +938,12 @@ gst_base_text_overlay_set_property (GObject * object, guint prop_id,
case PROP_SILENT:
overlay->silent = g_value_get_boolean (value);
break;
case PROP_DRAW_SHADOW:
overlay->draw_shadow = g_value_get_boolean (value);
break;
case PROP_DRAW_OUTLINE:
overlay->draw_outline = g_value_get_boolean (value);
break;
case PROP_LINE_ALIGNMENT:
overlay->line_align = g_value_get_enum (value);
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
@ -986,6 +1021,12 @@ gst_base_text_overlay_get_property (GObject * object, guint prop_id,
case PROP_SILENT:
g_value_set_boolean (value, overlay->silent);
break;
case PROP_DRAW_SHADOW:
g_value_set_boolean (value, overlay->draw_shadow);
break;
case PROP_DRAW_OUTLINE:
g_value_set_boolean (value, overlay->draw_outline);
break;
case PROP_LINE_ALIGNMENT:
g_value_set_enum (value, overlay->line_align);
break;
@ -1513,7 +1554,7 @@ gst_base_text_overlay_render_pangocairo (GstBaseTextOverlay * overlay,
*/
/* draw shadow text */
{
if (overlay->draw_shadow) {
PangoAttrList *origin_attr, *filtered_attr, *temp_attr;
/* Store a ref on the original attributes for later restoration */
@ -1538,18 +1579,20 @@ gst_base_text_overlay_render_pangocairo (GstBaseTextOverlay * 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_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);
cairo_restore (cr);
if (overlay->draw_outline) {
a = (overlay->outline_color >> 24) & 0xff;
r = (overlay->outline_color >> 16) & 0xff;
g = (overlay->outline_color >> 8) & 0xff;
b = (overlay->outline_color >> 0) & 0xff;
cairo_save (cr);
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);
cairo_restore (cr);
}
a = (overlay->color >> 24) & 0xff;
r = (overlay->color >> 16) & 0xff;

3
ext/pango/gstbasetextoverlay.h
View file

@ -173,6 +173,9 @@ struct _GstBaseTextOverlay {
gboolean auto_adjust_size;
gboolean need_render;
gboolean draw_shadow;
gboolean draw_outline;
gint shading_value; /* for timeoverlay subclass */
gboolean have_pango_markup;