static void
mate_bg_crossfade_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
MateBGCrossfade *fade;
g_assert (MATE_IS_BG_CROSSFADE (object));
fade = MATE_BG_CROSSFADE (object);
switch (property_id)
{
case PROP_WIDTH:
fade->priv->width = g_value_get_int (value);
break;
case PROP_HEIGHT:
fade->priv->height = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
/**
* mate_bg_crossfade_is_started:
* @fade: a #MateBGCrossfade
*
* This function reveals whether or not @fade is currently
* running on a window. See mate_bg_crossfade_start() for
* information on how to initiate a crossfade.
*
* Return value: %TRUE if fading, or %FALSE if not fading
**/
gboolean
mate_bg_crossfade_is_started (MateBGCrossfade *fade)
{
g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
return 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 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 ();
}
static gboolean
on_tick (MateBGCrossfade *fade)
{
gdouble now, percent_done;
cairo_t *cr;
cairo_status_t status;
g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
now = get_current_time ();
percent_done = (now - fade->priv->start_time) / fade->priv->total_duration;
percent_done = CLAMP (percent_done, 0.0, 1.0);
/* If it's taking a long time to get to the first frame,
* then lengthen the duration, so the user will get to see
* the effect.
*/
if (fade->priv->is_first_frame && percent_done > .33) {
fade->priv->is_first_frame = FALSE;
fade->priv->total_duration *= 1.5;
return on_tick (fade);
}
if (fade->priv->fading_surface == NULL ||
fade->priv->end_surface == NULL) {
return FALSE;
}
if (animations_are_disabled (fade)) {
return FALSE;
}
/* We accumulate the results in place for performance reasons.
*
* This means 1) The fade is exponential, not linear (looks good!)
* 2) The rate of fade is not independent of frame rate. Slower machines
* will get a slower fade (but never longer than .75 seconds), and
* even the fastest machines will get *some* fade because the framerate
* is capped.
*/
cr = cairo_create (fade->priv->fading_surface);
cairo_set_source_surface (cr, fade->priv->end_surface,
0.0, 0.0);
cairo_paint_with_alpha (cr, percent_done);
status = cairo_status (cr);
cairo_destroy (cr);
if (status == CAIRO_STATUS_SUCCESS) {
draw_background (fade);
}
return percent_done <= .99;
}
/**
* 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_widget:
* @fade: a #MateBGCrossfade
* @widget: The #GtkWidget to draw crossfade on
*
* This function initiates a quick crossfade between two surfaces on
* the background of @widget. 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_widget (MateBGCrossfade *fade,
GtkWidget *widget)
{
GdkWindow *window;
g_return_if_fail (MATE_IS_BG_CROSSFADE (fade));
g_return_if_fail (widget != NULL);
fade->priv->widget = widget;
gtk_widget_realize (fade->priv->widget);
window = gtk_widget_get_window (fade->priv->widget);
mate_bg_crossfade_start (fade, window);
}
mate_bg_crossfade_set_start_pixmap (MateBGCrossfade* fade, GdkPixmap *surface)
#endif
{
g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
if (fade->priv->fading_surface != NULL)
{
cairo_surface_destroy (fade->priv->fading_surface);
fade->priv->fading_surface = NULL;
}
fade->priv->fading_surface = tile_surface (surface,
fade->priv->width,
fade->priv->height);
return fade->priv->fading_surface != NULL;
}
/**
* mate_bg_crossfade_set_start_pixmap:
* @fade: a #MateBGCrossfade
* @pixmap: The #GdkPixmap to fade from
*
* Before initiating a crossfade with mate_bg_crossfade_start()
* a start and end pixmap have to be set. This function sets
* the pixmap shown at the beginning of the crossfade effect.
*
* Return value: %TRUE if successful, or %FALSE if the pixmap
* could not be copied.
**/
gboolean
mate_bg_crossfade_set_start_pixmap (MateBGCrossfade *fade,
GdkPixmap *pixmap)
{
g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
if (fade->priv->fading_pixmap != NULL) {
g_object_unref (fade->priv->fading_pixmap);
fade->priv->fading_pixmap = NULL;
}
fade->priv->fading_pixmap = tile_pixmap (pixmap,
fade->priv->width,
fade->priv->height);
return fade->priv->fading_pixmap != NULL;
}
/**
* mate_bg_crossfade_set_start_surface:
* @fade: a #MateBGCrossfade
* @surface: The cairo surface to fade from
*
* Before initiating a crossfade with mate_bg_crossfade_start()
* a start and end surface have to be set. This function sets
* the surface shown at the beginning of the crossfade effect.
*
* Return value: %TRUE if successful, or %FALSE if the surface
* could not be copied.
**/
gboolean
mate_bg_crossfade_set_start_surface (MateBGCrossfade* fade, cairo_surface_t *surface)
{
g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
if (fade->priv->start_surface != NULL)
{
cairo_surface_destroy (fade->priv->start_surface);
fade->priv->start_surface = NULL;
}
fade->priv->start_surface = tile_surface (surface,
fade->priv->width,
fade->priv->height);
return fade->priv->start_surface != NULL;
}
mate_bg_crossfade_set_end_pixmap (MateBGCrossfade* fade, GdkPixmap *surface)
#endif
{
g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
if (fade->priv->end_surface != NULL) {
cairo_surface_destroy (fade->priv->end_surface);
fade->priv->end_surface = NULL;
}
fade->priv->end_surface = tile_surface (surface,
fade->priv->width,
fade->priv->height);
/* Reset timer in case we're called while animating
*/
fade->priv->start_time = get_current_time ();
return fade->priv->end_surface != NULL;
}
gboolean mate_bg_crossfade_set_end_pixmap(MateBGCrossfade* fade, GdkPixmap* pixmap)
#endif
{
g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
if (fade->priv->end_pixmap != NULL) {
g_object_unref (fade->priv->end_pixmap);
fade->priv->end_pixmap = NULL;
}
fade->priv->end_pixmap = tile_pixmap (pixmap,
fade->priv->width,
fade->priv->height);
/* Reset timer in case we're called while animating
*/
fade->priv->start_time = get_current_time ();
return fade->priv->end_pixmap != NULL;
}
/**
* 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 ();
}
gboolean mate_bg_crossfade_set_start_pixmap(MateBGCrossfade* fade, GdkPixmap* pixmap)
#endif
{
/* I am disabling this because background fade break the mate-file-manager
* Estoy deshabilitando esto por que el efecto de desvanecimiento del fondo de pantalla, hace
* el mate-file-manager se cierre por un evento de BadDrawing enviado por Xorg.
* Y hasta que no sea solucionado, no es tan indispensable esta funcion.
* Pero sospecho que la funcion tile_pixmap tiene algo que ver...
*/
return FALSE;
g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
if (fade->priv->fading_pixmap != NULL) {
g_object_unref (fade->priv->fading_pixmap);
fade->priv->fading_pixmap = NULL;
}
fade->priv->fading_pixmap = tile_pixmap (pixmap,
fade->priv->width,
fade->priv->height);
return fade->priv->fading_pixmap != NULL;
}
/**
* 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 ();
}
