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/* GdkGLExt - OpenGL Extension to GDK
* Copyright (C) 2002-2004 Naofumi Yasufuku
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 "gdkglx.h"
#include "gdkglprivate-x11.h"
#include "gdkgloverlay-x11.h"
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
#include <gdk/gdkscreen.h>
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
#include <X11/Xmd.h>
/*
* SERVER_OVERLAY_VISUALS property entry format
*
* format: 32
*
* <Name> <Type> <Description>
* overlay_visual VisualID Visual ID of visual.
* transparent_type CARD32 None (0).
* TransparentPixel (1).
* TransparentMask (2).
* value CARD32 Pixel value or transparency mask.
* layer INT32 The layer the visual resides in.
*/
/*
* SOV property.
* (format is 32: the returned data is represented as a long array)
*/
typedef struct
{
long overlay_visual;
long transparent_type;
long value;
long layer;
} __SOVProp;
/* SOV properties data. */
typedef struct
{
__SOVProp *prop;
unsigned long num;
} __SOVPropArray;
static const gchar quark_sov_props_string[] = "gdk-gl-overlay-sov-props";
static GQuark quark_sov_props = 0;
static void
sov_prop_array_destroy (__SOVPropArray *sov_props)
{
if (sov_props->prop != NULL)
XFree (sov_props->prop);
g_free (sov_props);
}
static __SOVPropArray *
gdk_gl_overlay_get_sov_props (GdkScreen *screen)
{
__SOVPropArray *sov_props;
GdkWindow *root_window;
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
GdkDisplay *display;
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
Display *xdisplay;
Atom xa_sov;
Status status;
Atom actual_type;
int actual_format;
unsigned long nitems, bytes_after;
unsigned char *prop = NULL;
GDK_GL_NOTE_FUNC_PRIVATE ();
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
root_window = gdk_screen_get_root_window (screen);
#else /* GDKGLEXT_MULTIHEAD_SUPPORT */
root_window = gdk_get_default_root_window ();
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
if (quark_sov_props == 0)
quark_sov_props = g_quark_from_static_string (quark_sov_props_string);
sov_props = g_object_get_qdata (G_OBJECT (root_window), quark_sov_props);
if (sov_props != NULL)
return sov_props;
sov_props = g_malloc (sizeof (__SOVPropArray));
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
display = gdk_screen_get_display (screen);
xdisplay = GDK_DISPLAY_XDISPLAY (display);
xa_sov = gdk_x11_get_xatom_by_name_for_display (display, "SERVER_OVERLAY_VISUALS");
#else /* GDKGLEXT_MULTIHEAD_SUPPORT */
xdisplay = gdk_x11_get_default_xdisplay ();
xa_sov = gdk_x11_get_xatom_by_name ("SERVER_OVERLAY_VISUALS");
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
status = XGetWindowProperty (xdisplay, GDK_WINDOW_XWINDOW (root_window),
xa_sov, 0L, 1000000L, False, AnyPropertyType,
&actual_type, &actual_format,
&nitems, &bytes_after, &prop);
if (status != Success ||
actual_type == None ||
actual_format != 32 ||
nitems < 4)
{
GDK_GL_NOTE (MISC, g_message (" -- SERVER_OVERLAY_VISUALS: not supported"));
if (prop != NULL)
XFree (prop);
sov_props->prop = NULL;
sov_props->num = 0;
}
else
{
GDK_GL_NOTE (MISC, g_message (" -- SERVER_OVERLAY_VISUALS: supported"));
sov_props->prop = (__SOVProp *) prop;
sov_props->num = nitems / (sizeof (__SOVProp) / 4);
}
g_object_set_qdata_full (G_OBJECT (root_window), quark_sov_props, sov_props,
(GDestroyNotify) sov_prop_array_destroy);
#ifdef G_ENABLE_DEBUG
if (gdk_gl_debug_flags & GDK_GL_DEBUG_MISC)
{
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
int screen_num = GDK_SCREEN_XNUMBER (screen);
#else /* GDKGLEXT_MULTIHEAD_SUPPORT */
int screen_num = gdk_x11_get_default_screen ();
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
int i;
g_message (" -- SERVER_OVERLAY_VISUALS: properties");
g_print ("screen\tvisual\ttype\tvalue\tlayer\n");
for (i = 0; i < sov_props->num; i++)
{
g_print ("%d\t0x%lx\t%lu\t%lu\t%ld\n",
screen_num,
(VisualID) (sov_props->prop[i].overlay_visual),
(CARD32) (sov_props->prop[i].transparent_type),
(CARD32) (sov_props->prop[i].value),
(INT32) (sov_props->prop[i].layer));
}
}
#endif /* G_ENABLE_DEBUG */
return sov_props;
}
/* private at present... */
gboolean
_gdk_x11_gl_overlay_get_info (GdkVisual *visual,
GdkGLOverlayInfo *overlay_info)
{
__SOVPropArray *sov_props;
VisualID xvisualid;
int i;
GDK_GL_NOTE_FUNC_PRIVATE ();
g_return_val_if_fail (GDK_IS_VISUAL (visual), FALSE);
g_return_val_if_fail (overlay_info != NULL, FALSE);
/* Get SOV properties. */
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
sov_props = gdk_gl_overlay_get_sov_props (gdk_visual_get_screen (visual));
#else /* GDKGLEXT_MULTIHEAD_SUPPORT */
sov_props = gdk_gl_overlay_get_sov_props (NULL);
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
/* Look up SOV property for the visual. */
xvisualid = GDK_VISUAL_XVISUAL (visual)->visualid;
for (i = 0; i < sov_props->num; i++)
{
if ((VisualID) (sov_props->prop[i].overlay_visual) == xvisualid)
{
overlay_info->visual = visual;
overlay_info->transparent_type = sov_props->prop[i].transparent_type;
overlay_info->value = sov_props->prop[i].value;
overlay_info->layer = sov_props->prop[i].layer;
GDK_GL_NOTE (MISC, g_message (" -- overlay visual"));
GDK_GL_NOTE (MISC, g_print ("transparent_type = %d\n",
overlay_info->transparent_type));
GDK_GL_NOTE (MISC, g_print ("value = %u\n",
overlay_info->value));
GDK_GL_NOTE (MISC, g_print ("layer = %d\n",
overlay_info->layer));
return TRUE;
}
}
/* meaningless */
overlay_info->visual = visual;
overlay_info->transparent_type = GDK_GL_OVERLAY_TRANSPARENT_NONE;
overlay_info->value = 0;
overlay_info->layer = 0;
GDK_GL_NOTE (MISC, g_message (" -- not overlay visual"));
return FALSE;
}
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