/**
* mate_bg_crossfade_start:
* @fade: a #MateBGCrossfade
* @window: The #GdkWindow to draw crossfade on
*
* This function initiates a quick crossfade between two pixmaps on
* the background of @window. Before initiating the crossfade both
* mate_bg_crossfade_start() and mate_bg_crossfade_end() need to
* be called. If animations are disabled, the crossfade is skipped,
* and the window background is set immediately to the end pixmap.
**/
void
mate_bg_crossfade_start (MateBGCrossfade *fade,
GdkWindow *window)
{
GSource *source;
GMainContext *context;
g_return_if_fail (MATE_IS_BG_CROSSFADE (fade));
g_return_if_fail (window != NULL);
g_return_if_fail (fade->priv->fading_pixmap != NULL);
g_return_if_fail (fade->priv->end_pixmap != NULL);
g_return_if_fail (!mate_bg_crossfade_is_started (fade));
g_return_if_fail (GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN);
source = g_timeout_source_new (1000 / 60.0);
g_source_set_callback (source,
(GSourceFunc) on_tick,
fade,
(GDestroyNotify) on_finished);
context = g_main_context_default ();
fade->priv->timeout_id = g_source_attach (source, context);
g_source_unref (source);
fade->priv->window = window;
gdk_window_set_back_pixmap (fade->priv->window,
fade->priv->fading_pixmap,
FALSE);
draw_background (fade);
fade->priv->is_first_frame = TRUE;
fade->priv->total_duration = .75;
fade->priv->start_time = get_current_time ();
}
/**
* mate_bg_crossfade_stop:
* @fade: a #MateBGCrossfade
*
* This function stops any in progress crossfades that may be
* happening. It's harmless to call this function if @fade is
* already stopped.
**/
void
mate_bg_crossfade_stop (MateBGCrossfade *fade)
{
g_return_if_fail (MATE_IS_BG_CROSSFADE (fade));
if (!mate_bg_crossfade_is_started (fade))
return;
g_assert (fade->priv->timeout_id != 0);
g_source_remove (fade->priv->timeout_id);
fade->priv->timeout_id = 0;
}
/**
* mate_bg_crossfade_start:
* @fade: a #MateBGCrossfade
* @window: The #GdkWindow to draw crossfade on
*
* This function initiates a quick crossfade between two surfaces on
* the background of @window. Before initiating the crossfade both
* mate_bg_crossfade_start() and mate_bg_crossfade_end() need to
* be called. If animations are disabled, the crossfade is skipped,
* and the window background is set immediately to the end surface.
**/
void
mate_bg_crossfade_start (MateBGCrossfade *fade,
GdkWindow *window)
{
GSource *source;
GMainContext *context;
g_return_if_fail (MATE_IS_BG_CROSSFADE (fade));
g_return_if_fail (window != NULL);
g_return_if_fail (fade->priv->fading_surface != NULL);
g_return_if_fail (fade->priv->end_surface != NULL);
g_return_if_fail (!mate_bg_crossfade_is_started (fade));
g_return_if_fail (gdk_window_get_window_type (window) != GDK_WINDOW_FOREIGN);
source = g_timeout_source_new (1000 / 60.0);
g_source_set_callback (source,
(GSourceFunc) on_tick,
fade,
(GDestroyNotify) on_finished);
context = g_main_context_default ();
fade->priv->timeout_id = g_source_attach (source, context);
g_source_unref (source);
fade->priv->window = window;
#if GTK_CHECK_VERSION (3, 0, 0)
cairo_pattern_t *pattern;
pattern = cairo_pattern_create_for_surface (fade->priv->fading_surface);
gdk_window_set_background_pattern (fade->priv->window, pattern);
cairo_pattern_destroy (pattern);
#else
gdk_window_set_back_pixmap (fade->priv->window,
fade->priv->fading_surface,
FALSE);
#endif
draw_background (fade);
fade->priv->is_first_frame = TRUE;
fade->priv->total_duration = .75;
fade->priv->start_time = get_current_time ();
}
/**
* mate_bg_crossfade_start:
* @fade: a #MateBGCrossfade
* @window: The #GdkWindow to draw crossfade on
*
* This function initiates a quick crossfade between two surfaces on
* the background of @window. Before initiating the crossfade both
* mate_bg_crossfade_set_start_surface() and
* mate_bg_crossfade_set_end_surface() need to be called. If animations
* are disabled, the crossfade is skipped, and the window background is
* set immediately to the end surface.
**/
void
mate_bg_crossfade_start (MateBGCrossfade *fade,
GdkWindow *window)
{
GSource *source;
GMainContext *context;
g_return_if_fail (MATE_IS_BG_CROSSFADE (fade));
g_return_if_fail (window != NULL);
g_return_if_fail (fade->priv->start_surface != NULL);
g_return_if_fail (fade->priv->end_surface != NULL);
g_return_if_fail (!mate_bg_crossfade_is_started (fade));
g_return_if_fail (gdk_window_get_window_type (window) != GDK_WINDOW_FOREIGN);
/* If drawing is done on the root window,
* it is essential to have the root pixmap.
*/
if (gdk_window_get_window_type (window) == GDK_WINDOW_ROOT) {
GdkDisplay *display = gdk_window_get_display (window);
cairo_surface_t *surface = get_root_pixmap_id_surface (display);
g_return_if_fail (surface != NULL);
cairo_surface_destroy (surface);
}
if (fade->priv->fading_surface != NULL) {
cairo_surface_destroy (fade->priv->fading_surface);
fade->priv->fading_surface = NULL;
}
fade->priv->window = window;
if (gdk_window_get_window_type (fade->priv->window) != GDK_WINDOW_ROOT) {
fade->priv->fading_surface = tile_surface (fade->priv->start_surface,
fade->priv->width,
fade->priv->height);
if (fade->priv->widget != NULL) {
g_signal_connect (fade->priv->widget, "draw",
(GCallback) on_widget_draw, fade);
}
} else {
cairo_t *cr;
GdkDisplay *display = gdk_window_get_display (fade->priv->window);
fade->priv->fading_surface = get_root_pixmap_id_surface (display);
cr = cairo_create (fade->priv->fading_surface);
cairo_set_source_surface (cr, fade->priv->start_surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
}
draw_background (fade);
source = g_timeout_source_new (1000 / 60.0);
g_source_set_callback (source,
(GSourceFunc) on_tick,
fade,
(GDestroyNotify) on_finished);
context = g_main_context_default ();
fade->priv->timeout_id = g_source_attach (source, context);
g_source_unref (source);
fade->priv->is_first_frame = TRUE;
fade->priv->total_duration = .75;
fade->priv->start_time = get_current_time ();
}
