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xfce4-screensaver
xfce4-screensaver
Commit 1b5f5b49 authored by Sean Davis's avatar Sean Davis
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Drop unused xfce-bg-crossfade.{c,h}

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src/Makefile.am
View file @ 1b5f5b49
......@@ -257,8 +257,6 @@ xfce4_screensaver_SOURCES = \
xfce-rr.h \
xfce-bg.c \
xfce-bg.h \
xfce-bg-crossfade.c \
xfce-bg-crossfade.h \
xfce-desktop-thumbnail.c \
xfce-desktop-thumbnail.h \
xfce-desktop-utils.c \
......
src/xfce-bg-crossfade.c deleted 100644 → 0
View file @ 3ea61b8b
/* xfce-bg-crossfade.h - fade window background between two surfaces
*
* Copyright (C) 2008 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* Author: Ray Strode <rstrode@redhat.com>
*/
#include <string.h>
#include <math.h>
#include <stdarg.h>
#include <gio/gio.h>
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <gtk/gtk.h>
#include <cairo.h>
#include <cairo-xlib.h>
#include <xfce-bg.h>
#include "xfce-bg-crossfade.h"
struct _XfceBGCrossfadePrivate
{
GdkWindow *window;
GtkWidget *widget;
int width;
int height;
cairo_surface_t *fading_surface;
cairo_surface_t *start_surface;
cairo_surface_t *end_surface;
gdouble start_time;
gdouble total_duration;
guint timeout_id;
guint is_first_frame : 1;
};
enum {
PROP_0,
PROP_WIDTH,
PROP_HEIGHT,
};
enum {
FINISHED,
NUMBER_OF_SIGNALS
};
static guint signals[NUMBER_OF_SIGNALS] = { 0 };
G_DEFINE_TYPE (XfceBGCrossfade, xfce_bg_crossfade, G_TYPE_OBJECT)
#define XFCE_BG_CROSSFADE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o),\
XFCE_TYPE_BG_CROSSFADE,\
XfceBGCrossfadePrivate))
static void
xfce_bg_crossfade_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
XfceBGCrossfade *fade;
g_assert (XFCE_IS_BG_CROSSFADE (object));
fade = XFCE_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;
}
}
static void
xfce_bg_crossfade_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
XfceBGCrossfade *fade;
g_assert (XFCE_IS_BG_CROSSFADE (object));
fade = XFCE_BG_CROSSFADE (object);
switch (property_id)
{
case PROP_WIDTH:
g_value_set_int (value, fade->priv->width);
break;
case PROP_HEIGHT:
g_value_set_int (value, fade->priv->height);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
xfce_bg_crossfade_finalize (GObject *object)
{
XfceBGCrossfade *fade;
fade = XFCE_BG_CROSSFADE (object);
xfce_bg_crossfade_stop (fade);
if (fade->priv->fading_surface != NULL) {
cairo_surface_destroy (fade->priv->fading_surface);
fade->priv->fading_surface = NULL;
}
if (fade->priv->start_surface != NULL) {
cairo_surface_destroy (fade->priv->start_surface);
fade->priv->start_surface = NULL;
}
if (fade->priv->end_surface != NULL) {
cairo_surface_destroy (fade->priv->end_surface);
fade->priv->end_surface = NULL;
}
}
static void
xfce_bg_crossfade_class_init (XfceBGCrossfadeClass *fade_class)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (fade_class);
gobject_class->get_property = xfce_bg_crossfade_get_property;
gobject_class->set_property = xfce_bg_crossfade_set_property;
gobject_class->finalize = xfce_bg_crossfade_finalize;
/**
* XfceBGCrossfade:width:
*
* When a crossfade is running, this is width of the fading
* surface.
*/
g_object_class_install_property (gobject_class,
PROP_WIDTH,
g_param_spec_int ("width",
"Window Width",
"Width of window to fade",
0, G_MAXINT, 0,
G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE));
/**
* XfceBGCrossfade:height:
*
* When a crossfade is running, this is height of the fading
* surface.
*/
g_object_class_install_property (gobject_class,
PROP_HEIGHT,
g_param_spec_int ("height", "Window Height",
"Height of window to fade on",
0, G_MAXINT, 0,
G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE));
/**
* XfceBGCrossfade::finished:
* @fade: the #XfceBGCrossfade that received the signal
* @window: the #GdkWindow the crossfade happend on.
*
* When a crossfade finishes, @window will have a copy
* of the end surface as its background, and this signal will
* get emitted.
*/
signals[FINISHED] = g_signal_new ("finished",
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST, 0, NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, G_TYPE_OBJECT);
g_type_class_add_private (gobject_class, sizeof (XfceBGCrossfadePrivate));
}
static void
xfce_bg_crossfade_init (XfceBGCrossfade *fade)
{
fade->priv = XFCE_BG_CROSSFADE_GET_PRIVATE (fade);
fade->priv->window = NULL;
fade->priv->widget = NULL;
fade->priv->fading_surface = NULL;
fade->priv->start_surface = NULL;
fade->priv->end_surface = NULL;
fade->priv->timeout_id = 0;
}
/**
* xfce_bg_crossfade_new:
* @width: The width of the crossfading window
* @height: The height of the crossfading window
*
* Creates a new object to manage crossfading a
* window background between two #cairo_surface_ts.
*
* Return value: the new #XfceBGCrossfade
**/
XfceBGCrossfade* xfce_bg_crossfade_new (int width, int height)
{
GObject* object;
object = g_object_new(XFCE_TYPE_BG_CROSSFADE,
"width", width,
"height", height,
NULL);
return (XfceBGCrossfade*) object;
}
static cairo_surface_t *
tile_surface (cairo_surface_t *surface,
int width,
int height)
{
cairo_surface_t *copy;
cairo_t *cr;
if (surface == NULL)
{
copy = gdk_window_create_similar_surface (gdk_get_default_root_window (),
CAIRO_CONTENT_COLOR,
width, height);
}
else
{
copy = cairo_surface_create_similar (surface,
cairo_surface_get_content (surface),
width, height);
}
cr = cairo_create (copy);
if (surface != NULL)
{
cairo_pattern_t *pattern;
cairo_set_source_surface (cr, surface, 0.0, 0.0);
pattern = cairo_get_source (cr);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
}
else
{
GtkStyleContext *context;
GdkRGBA bg;
context = gtk_style_context_new ();
gtk_style_context_add_provider (context,
GTK_STYLE_PROVIDER (gtk_css_provider_get_default ()),
GTK_STYLE_PROVIDER_PRIORITY_THEME);
gtk_style_context_get_background_color (context, GTK_STATE_FLAG_NORMAL, &bg);
gdk_cairo_set_source_rgba(cr, &bg);
g_object_unref (G_OBJECT (context));
}
cairo_paint (cr);
if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
{
cairo_surface_destroy (copy);
copy = NULL;
}
cairo_destroy(cr);
return copy;
}
/**
* xfce_bg_crossfade_set_start_surface:
* @fade: a #XfceBGCrossfade
* @surface: The cairo surface to fade from
*
* Before initiating a crossfade with xfce_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
xfce_bg_crossfade_set_start_surface (XfceBGCrossfade* fade, cairo_surface_t *surface)
{
g_return_val_if_fail (XFCE_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;
}
static gdouble
get_current_time (void)
{
const double microseconds_per_second = (double) G_USEC_PER_SEC;
double timestamp;
GTimeVal now;
g_get_current_time (&now);
timestamp = ((microseconds_per_second * now.tv_sec) + now.tv_usec) /
microseconds_per_second;
return timestamp;
}
/**
* xfce_bg_crossfade_set_end_surface:
* @fade: a #XfceBGCrossfade
* @surface: The cairo surface to fade to
*
* Before initiating a crossfade with xfce_bg_crossfade_start()
* a start and end surface have to be set. This function sets
* the surface shown at the end of the crossfade effect.
*
* Return value: %TRUE if successful, or %FALSE if the surface
* could not be copied.
**/
gboolean
xfce_bg_crossfade_set_end_surface (XfceBGCrossfade* fade, cairo_surface_t *surface)
{
g_return_val_if_fail (XFCE_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;
}
static gboolean
animations_are_disabled (XfceBGCrossfade *fade)
{
GtkSettings *settings;
GdkScreen *screen;
gboolean are_enabled;
g_assert (fade->priv->window != NULL);
screen = gdk_window_get_screen(fade->priv->window);
settings = gtk_settings_get_for_screen (screen);
g_object_get (settings, "gtk-enable-animations", &are_enabled, NULL);
return !are_enabled;
}
static void
send_root_property_change_notification (XfceBGCrossfade *fade)
{
long zero_length_pixmap = 0;
/* We do a zero length append to force a change notification,
* without changing the value */
XChangeProperty (GDK_WINDOW_XDISPLAY (fade->priv->window),
GDK_WINDOW_XID (fade->priv->window),
gdk_x11_get_xatom_by_name ("_XROOTPMAP_ID"),
XA_PIXMAP, 32, PropModeAppend,
(unsigned char *) &zero_length_pixmap, 0);
}
static void
draw_background (XfceBGCrossfade *fade)
{
if (fade->priv->widget != NULL) {
gtk_widget_queue_draw (fade->priv->widget);
} else if (gdk_window_get_window_type (fade->priv->window) != GDK_WINDOW_ROOT) {
cairo_t *cr;
cairo_region_t *region;
GdkDrawingContext *draw_context;
region = gdk_window_get_visible_region (fade->priv->window);
draw_context = gdk_window_begin_draw_frame (fade->priv->window,
region);
cr = gdk_drawing_context_get_cairo_context (draw_context);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_source_surface (cr, fade->priv->fading_surface, 0, 0);
cairo_paint (cr);
gdk_window_end_draw_frame (fade->priv->window, draw_context);
cairo_region_destroy (region);
} else {
Display *xdisplay = GDK_WINDOW_XDISPLAY (fade->priv->window);
GdkDisplay *display;
display = gdk_display_get_default ();
gdk_x11_display_error_trap_push (display);
XGrabServer (xdisplay);
XClearWindow (xdisplay, GDK_WINDOW_XID (fade->priv->window));
send_root_property_change_notification (fade);
XFlush (xdisplay);
XUngrabServer (xdisplay);
gdk_x11_display_error_trap_pop_ignored (display);
}
}
static gboolean
on_widget_draw (GtkWidget *widget,
cairo_t *cr,
XfceBGCrossfade *fade)
{
g_assert (fade->priv->fading_surface != NULL);
cairo_set_source_surface (cr, fade->priv->fading_surface, 0, 0);
cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
cairo_paint (cr);
return FALSE;
}
static gboolean
on_tick (XfceBGCrossfade *fade)
{
gdouble now, percent_done;
cairo_t *cr;
cairo_status_t status;
g_return_val_if_fail (XFCE_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;
}
static void
on_finished (XfceBGCrossfade *fade)
{
cairo_t *cr;
if (fade->priv->timeout_id == 0)
return;
g_assert (fade->priv->fading_surface != NULL);
g_assert (fade->priv->end_surface != NULL);
cr = cairo_create (fade->priv->fading_surface);
cairo_set_source_surface (cr, fade->priv->end_surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
draw_background (fade);
cairo_surface_destroy (fade->priv->fading_surface);
fade->priv->fading_surface = NULL;
cairo_surface_destroy (fade->priv->end_surface);
fade->priv->end_surface = NULL;
g_assert (fade->priv->start_surface != NULL);
cairo_surface_destroy (fade->priv->start_surface);
fade->priv->start_surface = NULL;
if (fade->priv->widget != NULL) {
g_signal_handlers_disconnect_by_func (fade->priv->widget,
(GCallback) on_widget_draw,
fade);
}
fade->priv->widget = NULL;
fade->priv->timeout_id = 0;
g_signal_emit (fade, signals[FINISHED], 0, fade->priv->window);
}
/* This function queries the _XROOTPMAP_ID property from the root window
* to determine the current root window background pixmap and returns a
* surface to draw directly to it.
* If _XROOTPMAP_ID is not set, then NULL returned.
*/
static cairo_surface_t *
get_root_pixmap_id_surface (GdkDisplay *display)
{
GdkScreen *screen;
Display *xdisplay;
Visual *xvisual;
Window xroot;
Atom type;
int format, result;
unsigned long nitems, bytes_after;
unsigned char *data;
cairo_surface_t *surface = NULL;
g_return_val_if_fail (display != NULL, NULL);
screen = gdk_display_get_default_screen (display);
xdisplay = GDK_DISPLAY_XDISPLAY (display);
xvisual = GDK_VISUAL_XVISUAL (gdk_screen_get_system_visual (screen));
xroot = RootWindow (xdisplay, GDK_SCREEN_XNUMBER (screen));
result = XGetWindowProperty (xdisplay, xroot,
gdk_x11_get_xatom_by_name ("_XROOTPMAP_ID"),
0L, 1L, False, XA_PIXMAP,
&type, &format, &nitems, &bytes_after,
&data);
if (result != Success || type != XA_PIXMAP ||
format != 32 || nitems != 1) {
XFree (data);
data = NULL;
}
if (data != NULL) {
Pixmap pixmap = *(Pixmap *) data;
Window root_ret;
int x_ret, y_ret;
unsigned int w_ret, h_ret, bw_ret, depth_ret;
gdk_x11_display_error_trap_push (display);
if (XGetGeometry (xdisplay, pixmap, &root_ret,
&x_ret, &y_ret, &w_ret, &h_ret,
&bw_ret, &depth_ret))
{
surface = cairo_xlib_surface_create (xdisplay,
pixmap, xvisual,
w_ret, h_ret);
}
gdk_x11_display_error_trap_pop_ignored (display);
XFree (data);
}
gdk_display_flush (display);
return surface;
}
/**
* xfce_bg_crossfade_start:
* @fade: a #XfceBGCrossfade
* @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
* xfce_bg_crossfade_set_start_surface() and
* xfce_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