Desktop
/* $Id: logo.c,v 1.6 2012/08/26 20:15:43 khorben Exp $ */
/* Copyright (c) 2012 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Locker */
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <unistd.h>
#include <stdlib.h>
#ifdef DEBUG
# include <stdio.h>
#endif
#include <time.h>
#include <System.h>
#include "Locker/demo.h"
#include "../../config.h"
/* constants */
#ifndef PREFIX
# define PREFIX "/usr/local"
#endif
#ifndef DATADIR
# define DATADIR PREFIX "/share"
#endif
/* macros */
#ifndef MIN
# define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
/* Logo */
/* private */
/* types */
typedef struct _LogoWindow
{
GdkWindow * window;
GdkPixbuf * frame;
GdkPixmap * pixmap;
} LogoWindow;
typedef struct _LockerDemo
{
LockerDemoHelper * helper;
GdkPixbuf * logo;
LogoWindow * windows;
size_t windows_cnt;
guint timeout;
} Logo;
/* prototypes */
/* plug-in */
static Logo * _logo_init(LockerDemoHelper * helper);
static void _logo_destroy(Logo * logo);
static int _logo_add(Logo * logo, GdkWindow * window);
static void _logo_remove(Logo * logo, GdkWindow * window);
static void _logo_start(Logo * logo);
static void _logo_stop(Logo * logo);
/* callbacks */
static gboolean _logo_on_timeout(gpointer data);
/* public */
/* variables */
/* plug-in */
LockerDemoDefinition plugin =
{
"Logo",
NULL,
NULL,
_logo_init,
_logo_destroy,
_logo_add,
_logo_remove,
_logo_start,
_logo_stop
};
/* private */
/* functions */
/* plug-in */
/* logo_init */
static Logo * _logo_init(LockerDemoHelper * helper)
{
Logo * logo;
char const * p;
GError * error = NULL;
if((logo = object_new(sizeof(*logo))) == NULL)
return NULL;
/* initialization */
logo->helper = helper;
logo->logo = NULL;
logo->windows = NULL;
logo->windows_cnt = 0;
logo->timeout = 0;
/* load the logo */
if((p = helper->config_get(helper->locker, "logo", "logo")) == NULL)
{
helper->error(NULL, "No logo configured", 1);
p = DATADIR "/icons/gnome/256x256/places/start-here.png";
}
if((logo->logo = gdk_pixbuf_new_from_file(p, &error)) == NULL)
{
helper->error(NULL, error->message, 1);
g_error_free(error);
}
return logo;
}
/* logo_destroy */
static void _logo_destroy(Logo * logo)
{
object_delete(logo);
}
/* logo_add */
static int _logo_add(Logo * logo, GdkWindow * window)
{
LogoWindow * p;
GdkColor color = { 0x0, 0x0, 0x0, 0x0 };
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() window=%p\n", __func__, (void *)window);
#endif
if((p = realloc(logo->windows, sizeof(*p) * (logo->windows_cnt + 1)))
== NULL)
return -1;
logo->windows = p;
/* set the default color */
gdk_window_set_background(window, &color);
gdk_window_clear(window);
logo->windows[logo->windows_cnt].window = window;
logo->windows[logo->windows_cnt].frame = NULL;
logo->windows[logo->windows_cnt++].pixmap = NULL;
return 0;
}
/* logo_remove */
static void _logo_remove(Logo * logo, GdkWindow * window)
{
size_t i;
for(i = 0; i < logo->windows_cnt; i++)
if(logo->windows[i].window == window)
{
logo->windows[i].window = NULL;
if(logo->windows[i].frame != NULL)
g_object_unref(logo->windows[i].frame);
logo->windows[i].frame = NULL;
if(logo->windows[i].pixmap != NULL)
gdk_pixmap_unref(logo->windows[i].pixmap);
logo->windows[i].pixmap = NULL;
}
/* FIXME reorganize the array and free memory */
for(i = 0; i < logo->windows_cnt; i++)
if(logo->windows[i].window != NULL)
break;
if(i == logo->windows_cnt)
{
/* there are no windows left */
_logo_stop(logo);
free(logo->windows);
logo->windows = NULL;
logo->windows_cnt = 0;
}
}
/* logo_start */
static void _logo_start(Logo * logo)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(logo->timeout == 0 && _logo_on_timeout(logo) == TRUE)
logo->timeout = g_timeout_add(10000, _logo_on_timeout, logo);
}
/* logo_stop */
static void _logo_stop(Logo * logo)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(logo->timeout != 0)
g_source_remove(logo->timeout);
logo->timeout = 0;
}
/* callbacks */
/* logo_on_timeout */
static void _timeout_window(Logo * logo, LogoWindow * window);
static gboolean _logo_on_timeout(gpointer data)
{
Logo * logo = data;
size_t i;
for(i = 0; i < logo->windows_cnt; i++)
_timeout_window(logo, &logo->windows[i]);
return TRUE;
}
static void _timeout_window(Logo * logo, LogoWindow * window)
{
GdkWindow * w;
GdkRectangle rect;
int depth;
GdkPixbuf * frame;
GdkPixmap * pixmap;
int width;
int height;
int x = 0;
int y = 0;
int seed = time(NULL) ^ getpid() ^ getppid() ^ getuid() ^ getgid();
const int black = 0x000000ff;
if((w = window->window) == NULL)
return;
gdk_window_get_geometry(w, &rect.x, &rect.y, &rect.width,
&rect.height, &depth);
/* reallocate the frame and background if necessary */
if(window->frame == NULL
|| gdk_pixbuf_get_width(window->frame) != rect.width
|| gdk_pixbuf_get_height(window->frame) != rect.height)
{
if(window->frame != NULL)
g_object_unref(frame);
window->frame = gdk_pixbuf_new(GDK_COLORSPACE_RGB, 1, 8,
rect.width, rect.height);
if(window->pixmap != NULL)
gdk_pixmap_unref(pixmap);
window->pixmap = gdk_pixmap_new(w, rect.width, rect.width, -1);
}
frame = window->frame;
pixmap = window->pixmap;
gdk_pixbuf_fill(frame, black);
/* draw the logo */
if(logo->logo != NULL)
{
width = gdk_pixbuf_get_width(logo->logo);
width = MIN(rect.width, width);
height = gdk_pixbuf_get_height(logo->logo);
height = MIN(rect.height, height);
if(rect.width > width)
x = (rand() ^ seed) % (rect.width - width);
if(rect.height > height)
y = (rand() ^ seed) % (rect.height - height);
gdk_pixbuf_copy_area(logo->logo, 0, 0, width, height, frame, x,
y);
}
gdk_draw_pixbuf(pixmap, NULL, frame, 0, 0, 0, 0, rect.width,
rect.height, GDK_RGB_DITHER_NONE, 0, 0);
gdk_window_set_back_pixmap(w, pixmap, FALSE);
gdk_window_clear(w);
}