gtk2/gdk/x11/gdkscreen-x11.c
Owen Taylor 485fd85179 Fill in unused bits so they can be used for the depth-32 target case.
2005-05-09  Owen Taylor  <otaylor@redhat.com>

        * gdk/gdkrgb.c (gdk_rgb_convert_0888_br, gdk_rgb_convert_8880_br):
        Fill in unused bits so they can be used for the depth-32 target case.
        Rewrite so that that gives a marginal speedup rather than a
        marginal slowdown. (on x86)

        * gdk/gdkscreen.h gdk/x11/gdkscreen-x11.[ch] gdk/x11/gdkvisual-x11.c:
        Add gdk_screen_get_rgba_colormap/visual to get a visual for
        windows with an alpha channel, if one exists.

        * gdk/win32/gdkscreen-win32.c gdk/linux-fb/gdkscreen-fb.c:
        Stub out gdk_screen_get_rgba_colormap/visual.

        * gdk/x11/gdkcolor-x11.c (gdk_colormap_alloc_colors): computation of
        "unused" wasn't right for depth == 32, since it depended on
        shifting by 32.

        * gdk/gdkrgb.c: Fill in alpha bits with 1s. (Based on patch from
        Keith Packard,
        http://mail.gnome.org/archives/gtk-devel-list/2004-June/msg00080.html)

        * gdk/x11/gdkdrawable-x11.c (gdk_x11_drawable_get_picture):
        Implement again, without using Xft.

        * tests/testgtk.c: Add a test for windows with an alpha channel.
2005-05-09 22:54:10 +00:00

784 lines
20 KiB
C

/*
* gdkscreen-x11.c
*
* Copyright 2001 Sun Microsystems Inc.
*
* Erwann Chenede <erwann.chenede@sun.com>
*
* This library 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 library 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 library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include "gdkscreen.h"
#include "gdkscreen-x11.h"
#include "gdkdisplay.h"
#include "gdkdisplay-x11.h"
#include "gdkx.h"
#include "gdkalias.h"
#ifdef HAVE_SOLARIS_XINERAMA
#include <X11/extensions/xinerama.h>
#endif
#ifdef HAVE_XFREE_XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#ifdef HAVE_RANDR
#include <X11/extensions/Xrandr.h>
#endif
static void gdk_screen_x11_class_init (GdkScreenX11Class *klass);
static void gdk_screen_x11_dispose (GObject *object);
static void gdk_screen_x11_finalize (GObject *object);
static void init_xinerama_support (GdkScreen *screen);
static void init_randr_support (GdkScreen *screen);
enum
{
WINDOW_MANAGER_CHANGED,
LAST_SIGNAL
};
static gpointer parent_class = NULL;
static guint signals[LAST_SIGNAL] = { 0 };
GType
_gdk_screen_x11_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (GdkScreenX11Class),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_screen_x11_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkScreenX11),
0, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
object_type = g_type_register_static (GDK_TYPE_SCREEN,
"GdkScreenX11",
&object_info, 0);
}
return object_type;
}
static void
gdk_screen_x11_class_init (GdkScreenX11Class *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = gdk_screen_x11_dispose;
object_class->finalize = gdk_screen_x11_finalize;
parent_class = g_type_class_peek_parent (klass);
signals[WINDOW_MANAGER_CHANGED] =
g_signal_new ("window_manager_changed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdkScreenX11Class, window_manager_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0);
}
/**
* gdk_screen_get_display:
* @screen: a #GdkScreen
*
* Gets the display to which the @screen belongs.
*
* Returns: the display to which @screen belongs
*
* Since: 2.2
**/
GdkDisplay *
gdk_screen_get_display (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return GDK_SCREEN_X11 (screen)->display;
}
/**
* gdk_screen_get_width:
* @screen: a #GdkScreen
*
* Gets the width of @screen in pixels
*
* Returns: the width of @screen in pixels.
*
* Since: 2.2
**/
gint
gdk_screen_get_width (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return WidthOfScreen (GDK_SCREEN_X11 (screen)->xscreen);
}
/**
* gdk_screen_get_height:
* @screen: a #GdkScreen
*
* Gets the height of @screen in pixels
*
* Returns: the height of @screen in pixels.
*
* Since: 2.2
**/
gint
gdk_screen_get_height (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return HeightOfScreen (GDK_SCREEN_X11 (screen)->xscreen);
}
/**
* gdk_screen_get_width_mm:
* @screen: a #GdkScreen
*
* Gets the width of @screen in millimeters.
* Note that on some X servers this value will not be correct.
*
* Returns: the width of @screen in millimeters.
*
* Since: 2.2
**/
gint
gdk_screen_get_width_mm (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return WidthMMOfScreen (GDK_SCREEN_X11 (screen)->xscreen);
}
/**
* gdk_screen_get_height_mm:
* @screen: a #GdkScreen
*
* Returns the height of @screen in millimeters.
* Note that on some X servers this value will not be correct.
*
* Returns: the heigth of @screen in millimeters.
*
* Since: 2.2
**/
gint
gdk_screen_get_height_mm (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return HeightMMOfScreen (GDK_SCREEN_X11 (screen)->xscreen);
}
/**
* gdk_screen_get_number:
* @screen: a #GdkScreen
*
* Gets the index of @screen among the screens in the display
* to which it belongs. (See gdk_screen_get_display())
*
* Returns: the index
*
* Since: 2.2
**/
gint
gdk_screen_get_number (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return GDK_SCREEN_X11 (screen)->screen_num;
}
/**
* gdk_screen_get_root_window:
* @screen: a #GdkScreen
*
* Gets the root window of @screen.
*
* Returns: the root window
*
* Since: 2.2
**/
GdkWindow *
gdk_screen_get_root_window (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return GDK_SCREEN_X11 (screen)->root_window;
}
/**
* gdk_screen_get_default_colormap:
* @screen: a #GdkScreen
*
* Gets the default colormap for @screen.
*
* Returns: the default #GdkColormap.
*
* Since: 2.2
**/
GdkColormap *
gdk_screen_get_default_colormap (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return GDK_SCREEN_X11 (screen)->default_colormap;
}
/**
* gdk_screen_set_default_colormap:
* @screen: a #GdkScreen
* @colormap: a #GdkColormap
*
* Sets the default @colormap for @screen.
*
* Since: 2.2
**/
void
gdk_screen_set_default_colormap (GdkScreen *screen,
GdkColormap *colormap)
{
GdkColormap *old_colormap;
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (GDK_IS_COLORMAP (colormap));
old_colormap = GDK_SCREEN_X11 (screen)->default_colormap;
GDK_SCREEN_X11 (screen)->default_colormap = g_object_ref (colormap);
if (old_colormap)
g_object_unref (old_colormap);
}
static void
gdk_screen_x11_dispose (GObject *object)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (object);
_gdk_x11_events_uninit_screen (GDK_SCREEN (object));
g_object_unref (screen_x11->default_colormap);
screen_x11->default_colormap = NULL;
if (screen_x11->rgba_colormap)
{
g_object_unref (screen_x11->rgba_colormap);
screen_x11->rgba_colormap = NULL;
}
screen_x11->root_window = NULL;
screen_x11->xdisplay = NULL;
screen_x11->xscreen = NULL;
screen_x11->screen_num = -1;
screen_x11->xroot_window = None;
screen_x11->wmspec_check_window = None;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gdk_screen_x11_finalize (GObject *object)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (object);
/* int i; */
g_object_unref (screen_x11->root_window);
if (screen_x11->renderer)
g_object_unref (screen_x11->renderer);
/* Visual Part (Need to implement finalize for Visuals for a clean
* finalize) */
/* for (i=0;i<screen_x11->nvisuals;i++)
g_object_unref (screen_x11->visuals[i]);*/
g_free (screen_x11->visuals);
g_hash_table_destroy (screen_x11->visual_hash);
g_free (screen_x11->window_manager_name);
g_hash_table_destroy (screen_x11->colormap_hash);
/* X settings */
g_free (screen_x11->xsettings_client);
g_free (screen_x11->monitors);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gdk_screen_get_n_monitors:
* @screen: a #GdkScreen.
*
* Returns the number of monitors which @screen consists of.
*
* Returns: number of monitors which @screen consists of.
*
* Since: 2.2
**/
gint
gdk_screen_get_n_monitors (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);
return GDK_SCREEN_X11 (screen)->num_monitors;
}
/**
* gdk_screen_get_monitor_geometry:
* @screen : a #GdkScreen.
* @monitor_num: the monitor number.
* @dest : a #GdkRectangle to be filled with the monitor geometry
*
* Retrieves the #GdkRectangle representing the size and position of
* the individual monitor within the entire screen area.
*
* Note that the size of the entire screen area can be retrieved via
* gdk_screen_get_width() and gdk_screen_get_height().
*
* Since: 2.2
**/
void
gdk_screen_get_monitor_geometry (GdkScreen *screen,
gint monitor_num,
GdkRectangle *dest)
{
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (monitor_num < GDK_SCREEN_X11 (screen)->num_monitors);
g_return_if_fail (monitor_num >= 0);
*dest = GDK_SCREEN_X11 (screen)->monitors[monitor_num];
}
/**
* gdk_screen_get_rgba_colormap:
* @screen: a #GdkScreen.
*
* Gets a colormap to use for creating windows or pixmaps with an
* alpha channel. The windowing system on which GTK+ is running
* may not support this capability, in which case %NULL will
* be returned. Even if a non-%NULL value is returned, its
* possible that the window's alpha channel won't be honored
* when displaying the window on the screen: in particular, for
* X an appropriate windowing manager and compositing manager
* must be running to provide appropriate display.
*
* Return value: a colormap to use for windows with an alpha channel
* or %NULL if the capability is not available.
*
* Since: 2.8
**/
GdkColormap *
gdk_screen_get_rgba_colormap (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
if (!screen_x11->rgba_visual)
return NULL;
if (!screen_x11->rgba_colormap)
screen_x11->rgba_colormap = gdk_colormap_new (screen_x11->rgba_visual,
FALSE);
return screen_x11->rgba_colormap;
}
/**
* gdk_screen_get_rgba_visual:
* @screen: a #GdkScreen
*
* Gets a visual to use for creating windows or pixmaps with an
* alpha channel. See the docs for gdk_screen_get_rgba_colormap()
* for caveats.
*
* Return value: a visual to use for windows with an alpha channel
* or %NULL if the capability is not available.
*
* Since: 2.8
**/
GdkVisual *
gdk_screen_get_rgba_visual (GdkScreen *screen)
{
GdkScreenX11 *screen_x11;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
return screen_x11->rgba_visual;
}
/**
* gdk_x11_screen_get_xscreen:
* @screen: a #GdkScreen.
* @returns: an Xlib <type>Screen*</type>
*
* Returns the screen of a #GdkScreen.
*
* Since: 2.2
*/
Screen *
gdk_x11_screen_get_xscreen (GdkScreen *screen)
{
return GDK_SCREEN_X11 (screen)->xscreen;
}
/**
* gdk_x11_screen_get_screen_number:
* @screen: a #GdkScreen.
* @returns: the position of @screen among the screens of
* its display.
*
* Returns the index of a #GdkScreen.
*
* Since: 2.2
*/
int
gdk_x11_screen_get_screen_number (GdkScreen *screen)
{
return GDK_SCREEN_X11 (screen)->screen_num;
}
GdkScreen *
_gdk_x11_screen_new (GdkDisplay *display,
gint screen_number)
{
GdkScreen *screen;
GdkScreenX11 *screen_x11;
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
screen = g_object_new (GDK_TYPE_SCREEN_X11, NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
screen_x11->display = display;
screen_x11->xdisplay = display_x11->xdisplay;
screen_x11->xscreen = ScreenOfDisplay (display_x11->xdisplay, screen_number);
screen_x11->screen_num = screen_number;
screen_x11->xroot_window = RootWindow (display_x11->xdisplay,screen_number);
screen_x11->wmspec_check_window = None;
/* we want this to be always non-null */
screen_x11->window_manager_name = g_strdup ("unknown");
init_xinerama_support (screen);
init_randr_support (screen);
_gdk_visual_init (screen);
_gdk_windowing_window_init (screen);
return screen;
}
#ifdef HAVE_XINERAMA
static gboolean
check_solaris_xinerama (GdkScreen *screen)
{
#ifdef HAVE_SOLARIS_XINERAMA
if (XineramaGetState (GDK_SCREEN_XDISPLAY (screen),
gdk_screen_get_number (screen)))
{
XRectangle monitors[MAXFRAMEBUFFERS];
unsigned char hints[16];
gint result;
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
result = XineramaGetInfo (GDK_SCREEN_XDISPLAY (screen),
gdk_screen_get_number (screen),
monitors, hints,
&screen_x11->num_monitors);
/* Yes I know it should be Success but the current implementation
returns the num of monitor*/
if (result == 0)
{
/* FIXME: We need to trap errors, since XINERAMA isn't always XINERAMA.
*/
g_error ("error while retrieving Xinerama information");
}
else
{
int i;
screen_x11->monitors = g_new0 (GdkRectangle, screen_x11->num_monitors);
for (i = 0; i < screen_x11->num_monitors; i++)
{
screen_x11->monitors[i].x = monitors[i].x;
screen_x11->monitors[i].y = monitors[i].y;
screen_x11->monitors[i].width = monitors[i].width;
screen_x11->monitors[i].height = monitors[i].height;
}
return TRUE;
}
}
#endif /* HAVE_SOLARIS_XINERAMA */
return FALSE;
}
static gboolean
check_xfree_xinerama (GdkScreen *screen)
{
#ifdef HAVE_XFREE_XINERAMA
if (XineramaIsActive (GDK_SCREEN_XDISPLAY (screen)))
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
XineramaScreenInfo *monitors = XineramaQueryScreens (GDK_SCREEN_XDISPLAY (screen),
&screen_x11->num_monitors);
if (screen_x11->num_monitors <= 0)
{
/* FIXME: We need to trap errors, since XINERAMA isn't always XINERAMA.
* I don't think the num_monitors <= 0 check has any validity.
*/
g_error ("error while retrieving Xinerama information");
}
else
{
int i;
screen_x11->monitors = g_new0 (GdkRectangle, screen_x11->num_monitors);
for (i = 0; i < screen_x11->num_monitors; i++)
{
screen_x11->monitors[i].x = monitors[i].x_org;
screen_x11->monitors[i].y = monitors[i].y_org;
screen_x11->monitors[i].width = monitors[i].width;
screen_x11->monitors[i].height = monitors[i].height;
}
XFree (monitors);
return TRUE;
}
}
#endif /* HAVE_XFREE_XINERAMA */
return FALSE;
}
#endif /* HAVE_XINERAMA */
static void
init_xinerama_support (GdkScreen * screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
#ifdef HAVE_XINERAMA
int opcode, firstevent, firsterror;
#endif
if (screen_x11->monitors)
g_free (screen_x11->monitors);
#ifdef HAVE_XINERAMA
if (XQueryExtension (GDK_SCREEN_XDISPLAY (screen), "XINERAMA",
&opcode, &firstevent, &firsterror))
{
if (check_solaris_xinerama (screen) ||
check_xfree_xinerama (screen))
return;
}
#endif /* HAVE_XINERAMA */
/* No Xinerama
*/
#ifdef G_ENABLE_DEBUG
if (_gdk_debug_flags & GDK_DEBUG_XINERAMA)
{
/* Fake Xinerama mode by splitting the screen into 4 monitors.
* Also draw a little cross to make the monitor boundaries visible.
*/
XSetWindowAttributes atts;
Window win;
gint w, h;
w = WidthOfScreen (screen_x11->xscreen);
h = HeightOfScreen (screen_x11->xscreen);
screen_x11->num_monitors = 4;
screen_x11->monitors = g_new0 (GdkRectangle, 4);
screen_x11->monitors[0].x = 0;
screen_x11->monitors[0].y = 0;
screen_x11->monitors[0].width = w / 2;
screen_x11->monitors[0].height = h / 2;
screen_x11->monitors[1].x = w / 2;
screen_x11->monitors[1].y = 0;
screen_x11->monitors[1].width = w / 2;
screen_x11->monitors[1].height = h / 2;
screen_x11->monitors[2].x = 0;
screen_x11->monitors[2].y = h / 2;
screen_x11->monitors[2].width = w / 2;
screen_x11->monitors[2].height = h / 2;
screen_x11->monitors[3].x = w / 2;
screen_x11->monitors[3].y = h / 2;
screen_x11->monitors[3].width = w / 2;
screen_x11->monitors[3].height = h / 2;
atts.override_redirect = 1;
atts.background_pixel = WhitePixel(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num);
win = XCreateWindow(GDK_SCREEN_XDISPLAY (screen),
screen_x11->xroot_window, 0, h / 2, w, 1, 0,
DefaultDepth(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num),
InputOutput,
DefaultVisual(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num),
CWOverrideRedirect|CWBackPixel,
&atts);
XMapRaised(GDK_SCREEN_XDISPLAY (screen), win);
win = XCreateWindow(GDK_SCREEN_XDISPLAY (screen),
screen_x11->xroot_window, w/2 , 0, 1, h, 0,
DefaultDepth(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num),
InputOutput,
DefaultVisual(GDK_SCREEN_XDISPLAY (screen),
screen_x11->screen_num),
CWOverrideRedirect|CWBackPixel,
&atts);
XMapRaised(GDK_SCREEN_XDISPLAY (screen), win);
}
else
#endif
{
screen_x11->num_monitors = 1;
screen_x11->monitors = g_new0 (GdkRectangle, 1);
screen_x11->monitors[0].x = 0;
screen_x11->monitors[0].y = 0;
screen_x11->monitors[0].width = WidthOfScreen (screen_x11->xscreen);
screen_x11->monitors[0].height = HeightOfScreen (screen_x11->xscreen);
}
}
static void
init_randr_support (GdkScreen * screen)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (screen);
XSelectInput (GDK_SCREEN_XDISPLAY (screen),
screen_x11->xroot_window,
StructureNotifyMask);
}
void
_gdk_x11_screen_size_changed (GdkScreen *screen,
XEvent *event)
{
#ifdef HAVE_RANDR
if (!XRRUpdateConfiguration (event))
return;
#else
if (event->type == ConfigureNotify)
{
XConfigureEvent *rcevent = (XConfigureEvent *) event;
Screen *xscreen = gdk_x11_screen_get_xscreen (screen);
xscreen->width = rcevent->width;
xscreen->height = rcevent->height;
}
else
return;
#endif
init_xinerama_support (screen);
g_signal_emit_by_name (screen, "size_changed");
}
void
_gdk_x11_screen_window_manager_changed (GdkScreen *screen)
{
g_signal_emit (screen, signals[WINDOW_MANAGER_CHANGED], 0);
}
/**
* _gdk_windowing_substitute_screen_number:
* @display_name : The name of a display, in the form used by
* gdk_display_open (). If %NULL a default value
* will be used. On X11, this is derived from the DISPLAY
* environment variable.
* @screen_number : The number of a screen within the display
* referred to by @display_name.
*
* Modifies a @display_name to make @screen_number the default
* screen when the display is opened.
*
* Return value: a newly allocated string holding the resulting
* display name. Free with g_free().
*/
gchar *
_gdk_windowing_substitute_screen_number (const gchar *display_name,
gint screen_number)
{
GString *str;
gchar *p;
if (!display_name)
display_name = getenv ("DISPLAY");
if (!display_name)
return NULL;
str = g_string_new (display_name);
p = strrchr (str->str, '.');
if (p && p > strchr (str->str, ':'))
g_string_truncate (str, p - str->str);
g_string_append_printf (str, ".%d", screen_number);
return g_string_free (str, FALSE);
}
/**
* gdk_screen_make_display_name:
* @screen: a #GdkScreen
*
* Determines the name to pass to gdk_display_open() to get
* a #GdkDisplay with this screen as the default screen.
*
* Return value: a newly allocated string, free with g_free()
*
* Since: 2.2
**/
gchar *
gdk_screen_make_display_name (GdkScreen *screen)
{
const gchar *old_display;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
old_display = gdk_display_get_name (gdk_screen_get_display (screen));
return _gdk_windowing_substitute_screen_number (old_display,
gdk_screen_get_number (screen));
}
#define __GDK_SCREEN_X11_C__
#include "gdkaliasdef.c"