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gtk/gdk/x11/gdkvisual-x11.c
Javier Jardón 9d0febc9a6 Change FSF Address
2012-02-27 17:06:11 +00:00

579 lines
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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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 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, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gdkvisualprivate.h"
#include "gdkprivate-x11.h"
#include "gdkscreen-x11.h"
#include <X11/Xlib.h>
#include <X11/Xutil.h>
struct _GdkX11Visual
{
GdkVisual visual;
Visual *xvisual;
Colormap colormap;
};
struct _GdkX11VisualClass
{
GdkVisualClass visual_class;
};
static void gdk_visual_add (GdkVisual *visual);
static void gdk_visual_decompose_mask (gulong mask,
gint *shift,
gint *prec);
static guint gdk_visual_hash (Visual *key);
static gboolean gdk_visual_equal (Visual *a,
Visual *b);
#ifdef G_ENABLE_DEBUG
static const gchar *const visual_names[] =
{
"static gray",
"grayscale",
"static color",
"pseudo color",
"true color",
"direct color",
};
#endif /* G_ENABLE_DEBUG */
G_DEFINE_TYPE (GdkX11Visual, gdk_x11_visual, GDK_TYPE_VISUAL)
static void
gdk_x11_visual_init (GdkX11Visual *x11_visual)
{
x11_visual->colormap = None;
}
static void
gdk_x11_visual_finalize (GObject *object)
{
GdkVisual *visual = (GdkVisual *)object;
GdkX11Visual *x11_visual = (GdkX11Visual *)object;
if (x11_visual->colormap != None)
XFreeColormap (GDK_SCREEN_XDISPLAY (visual->screen), x11_visual->colormap);
G_OBJECT_CLASS (gdk_x11_visual_parent_class)->finalize (object);
}
static void
gdk_x11_visual_class_init (GdkX11VisualClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = gdk_x11_visual_finalize;
}
void
_gdk_x11_screen_init_visuals (GdkScreen *screen)
{
static const gint possible_depths[8] = { 32, 30, 24, 16, 15, 8, 4, 1 };
static const GdkVisualType possible_types[6] =
{
GDK_VISUAL_DIRECT_COLOR,
GDK_VISUAL_TRUE_COLOR,
GDK_VISUAL_PSEUDO_COLOR,
GDK_VISUAL_STATIC_COLOR,
GDK_VISUAL_GRAYSCALE,
GDK_VISUAL_STATIC_GRAY
};
GdkX11Screen *x11_screen;
XVisualInfo *visual_list;
XVisualInfo visual_template;
GdkVisual *temp_visual;
Visual *default_xvisual;
GdkVisual **visuals;
int nxvisuals;
int nvisuals;
int i, j;
g_return_if_fail (GDK_IS_SCREEN (screen));
x11_screen = GDK_X11_SCREEN (screen);
nxvisuals = 0;
visual_template.screen = x11_screen->screen_num;
visual_list = XGetVisualInfo (x11_screen->xdisplay, VisualScreenMask, &visual_template, &nxvisuals);
visuals = g_new (GdkVisual *, nxvisuals);
for (i = 0; i < nxvisuals; i++)
visuals[i] = g_object_new (GDK_TYPE_X11_VISUAL, NULL);
default_xvisual = DefaultVisual (x11_screen->xdisplay, x11_screen->screen_num);
nvisuals = 0;
for (i = 0; i < nxvisuals; i++)
{
visuals[nvisuals]->screen = screen;
if (visual_list[i].depth >= 1)
{
#ifdef __cplusplus
switch (visual_list[i].c_class)
#else /* __cplusplus */
switch (visual_list[i].class)
#endif /* __cplusplus */
{
case StaticGray:
visuals[nvisuals]->type = GDK_VISUAL_STATIC_GRAY;
break;
case GrayScale:
visuals[nvisuals]->type = GDK_VISUAL_GRAYSCALE;
break;
case StaticColor:
visuals[nvisuals]->type = GDK_VISUAL_STATIC_COLOR;
break;
case PseudoColor:
visuals[nvisuals]->type = GDK_VISUAL_PSEUDO_COLOR;
break;
case TrueColor:
visuals[nvisuals]->type = GDK_VISUAL_TRUE_COLOR;
break;
case DirectColor:
visuals[nvisuals]->type = GDK_VISUAL_DIRECT_COLOR;
break;
}
visuals[nvisuals]->depth = visual_list[i].depth;
visuals[nvisuals]->byte_order =
(ImageByteOrder(x11_screen->xdisplay) == LSBFirst) ?
GDK_LSB_FIRST : GDK_MSB_FIRST;
visuals[nvisuals]->red_mask = visual_list[i].red_mask;
visuals[nvisuals]->green_mask = visual_list[i].green_mask;
visuals[nvisuals]->blue_mask = visual_list[i].blue_mask;
visuals[nvisuals]->colormap_size = visual_list[i].colormap_size;
visuals[nvisuals]->bits_per_rgb = visual_list[i].bits_per_rgb;
GDK_X11_VISUAL (visuals[nvisuals])->xvisual = visual_list[i].visual;
if ((visuals[nvisuals]->type == GDK_VISUAL_TRUE_COLOR) ||
(visuals[nvisuals]->type == GDK_VISUAL_DIRECT_COLOR))
{
gdk_visual_decompose_mask (visuals[nvisuals]->red_mask,
&visuals[nvisuals]->red_shift,
&visuals[nvisuals]->red_prec);
gdk_visual_decompose_mask (visuals[nvisuals]->green_mask,
&visuals[nvisuals]->green_shift,
&visuals[nvisuals]->green_prec);
gdk_visual_decompose_mask (visuals[nvisuals]->blue_mask,
&visuals[nvisuals]->blue_shift,
&visuals[nvisuals]->blue_prec);
}
else
{
visuals[nvisuals]->red_mask = 0;
visuals[nvisuals]->red_shift = 0;
visuals[nvisuals]->red_prec = 0;
visuals[nvisuals]->green_mask = 0;
visuals[nvisuals]->green_shift = 0;
visuals[nvisuals]->green_prec = 0;
visuals[nvisuals]->blue_mask = 0;
visuals[nvisuals]->blue_shift = 0;
visuals[nvisuals]->blue_prec = 0;
}
nvisuals += 1;
}
}
if (visual_list)
XFree (visual_list);
for (i = 0; i < nvisuals; i++)
{
for (j = i+1; j < nvisuals; j++)
{
if (visuals[j]->depth >= visuals[i]->depth)
{
if ((visuals[j]->depth == 8) && (visuals[i]->depth == 8))
{
if (visuals[j]->type == GDK_VISUAL_PSEUDO_COLOR)
{
temp_visual = visuals[j];
visuals[j] = visuals[i];
visuals[i] = temp_visual;
}
else if ((visuals[i]->type != GDK_VISUAL_PSEUDO_COLOR) &&
visuals[j]->type > visuals[i]->type)
{
temp_visual = visuals[j];
visuals[j] = visuals[i];
visuals[i] = temp_visual;
}
}
else if ((visuals[j]->depth > visuals[i]->depth) ||
((visuals[j]->depth == visuals[i]->depth) &&
(visuals[j]->type > visuals[i]->type)))
{
temp_visual = visuals[j];
visuals[j] = visuals[i];
visuals[i] = temp_visual;
}
}
}
}
for (i = 0; i < nvisuals; i++)
{
if (default_xvisual->visualid == GDK_X11_VISUAL (visuals[i])->xvisual->visualid)
{
x11_screen->system_visual = visuals[i];
GDK_X11_VISUAL (visuals[i])->colormap =
DefaultColormap (x11_screen->xdisplay, x11_screen->screen_num);
}
/* For now, we only support 8888 ARGB for the "rgba visual".
* Additional formats (like ABGR) could be added later if they
* turn up.
*/
if (visuals[i]->depth == 32 &&
(visuals[i]->red_mask == 0xff0000 &&
visuals[i]->green_mask == 0x00ff00 &&
visuals[i]->blue_mask == 0x0000ff))
{
x11_screen->rgba_visual = visuals[i];
}
}
#ifdef G_ENABLE_DEBUG
if (_gdk_debug_flags & GDK_DEBUG_MISC)
{
static const gchar *const visual_names[] =
{
"static gray",
"grayscale",
"static color",
"pseudo color",
"true color",
"direct color",
};
for (i = 0; i < nvisuals; i++)
g_message ("visual: %s: %d", visual_names[visuals[i]->type], visuals[i]->depth);
}
#endif /* G_ENABLE_DEBUG */
x11_screen->navailable_depths = 0;
for (i = 0; i < G_N_ELEMENTS (possible_depths); i++)
{
for (j = 0; j < nvisuals; j++)
{
if (visuals[j]->depth == possible_depths[i])
{
x11_screen->available_depths[x11_screen->navailable_depths++] = visuals[j]->depth;
break;
}
}
}
if (x11_screen->navailable_depths == 0)
g_error ("unable to find a usable depth");
x11_screen->navailable_types = 0;
for (i = 0; i < G_N_ELEMENTS (possible_types); i++)
{
for (j = 0; j < nvisuals; j++)
{
if (visuals[j]->type == possible_types[i])
{
x11_screen->available_types[x11_screen->navailable_types++] = visuals[j]->type;
break;
}
}
}
for (i = 0; i < nvisuals; i++)
gdk_visual_add (visuals[i]);
if (x11_screen->navailable_types == 0)
g_error ("unable to find a usable visual type");
x11_screen->visuals = visuals;
x11_screen->nvisuals = nvisuals;
}
gint
_gdk_x11_screen_visual_get_best_depth (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->available_depths[0];
}
GdkVisualType
_gdk_x11_screen_visual_get_best_type (GdkScreen *screen)
{
return GDK_X11_SCREEN (screen)->available_types[0];
}
GdkVisual *
_gdk_x11_screen_get_system_visual (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return ((GdkVisual *) GDK_X11_SCREEN (screen)->system_visual);
}
GdkVisual*
_gdk_x11_screen_visual_get_best (GdkScreen *screen)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
return x11_screen->visuals[0];
}
GdkVisual*
_gdk_x11_screen_visual_get_best_with_depth (GdkScreen *screen,
gint depth)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < x11_screen->nvisuals; i++)
if (depth == x11_screen->visuals[i]->depth)
{
return_val = x11_screen->visuals[i];
break;
}
return return_val;
}
GdkVisual*
_gdk_x11_screen_visual_get_best_with_type (GdkScreen *screen,
GdkVisualType visual_type)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < x11_screen->nvisuals; i++)
if (visual_type == x11_screen->visuals[i]->type)
{
return_val = x11_screen->visuals[i];
break;
}
return return_val;
}
GdkVisual*
_gdk_x11_screen_visual_get_best_with_both (GdkScreen *screen,
gint depth,
GdkVisualType visual_type)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < x11_screen->nvisuals; i++)
if ((depth == x11_screen->visuals[i]->depth) &&
(visual_type == x11_screen->visuals[i]->type))
{
return_val = x11_screen->visuals[i];
break;
}
return return_val;
}
void
_gdk_x11_screen_query_depths (GdkScreen *screen,
gint **depths,
gint *count)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
*count = x11_screen->navailable_depths;
*depths = x11_screen->available_depths;
}
void
_gdk_x11_screen_query_visual_types (GdkScreen *screen,
GdkVisualType **visual_types,
gint *count)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
*count = x11_screen->navailable_types;
*visual_types = x11_screen->available_types;
}
GList *
_gdk_x11_screen_list_visuals (GdkScreen *screen)
{
GList *list;
GdkX11Screen *x11_screen;
guint i;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
x11_screen = GDK_X11_SCREEN (screen);
list = NULL;
for (i = 0; i < x11_screen->nvisuals; ++i)
list = g_list_append (list, x11_screen->visuals[i]);
return list;
}
/**
* gdk_x11_screen_lookup_visual:
* @screen: (type GdkX11Screen): a #GdkScreen.
* @xvisualid: an X Visual ID.
*
* Looks up the #GdkVisual for a particular screen and X Visual ID.
*
* Returns: (transfer none): the #GdkVisual (owned by the screen
* object), or %NULL if the visual ID wasn't found.
*
* Since: 2.2
*/
GdkVisual *
gdk_x11_screen_lookup_visual (GdkScreen *screen,
VisualID xvisualid)
{
int i;
GdkX11Screen *x11_screen;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
x11_screen = GDK_X11_SCREEN (screen);
for (i = 0; i < x11_screen->nvisuals; i++)
if (xvisualid == GDK_X11_VISUAL (x11_screen->visuals[i])->xvisual->visualid)
return x11_screen->visuals[i];
return NULL;
}
static void
gdk_visual_add (GdkVisual *visual)
{
GdkX11Screen *x11_screen = GDK_X11_SCREEN (visual->screen);
if (!x11_screen->visual_hash)
x11_screen->visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
(GEqualFunc) gdk_visual_equal);
g_hash_table_insert (x11_screen->visual_hash, GDK_X11_VISUAL (visual)->xvisual, visual);
}
static void
gdk_visual_decompose_mask (gulong mask,
gint *shift,
gint *prec)
{
*shift = 0;
*prec = 0;
if (mask == 0)
{
g_warning ("Mask is 0 in visual. Server bug ?");
return;
}
while (!(mask & 0x1))
{
(*shift)++;
mask >>= 1;
}
while (mask & 0x1)
{
(*prec)++;
mask >>= 1;
}
}
static guint
gdk_visual_hash (Visual *key)
{
return key->visualid;
}
static gboolean
gdk_visual_equal (Visual *a,
Visual *b)
{
return (a->visualid == b->visualid);
}
/**
* _gdk_visual_get_x11_colormap:
* @visual: the visual to get the colormap from
*
* Gets the colormap to use
*
* Returns: the X Colormap to use for new windows using @visual
**/
Colormap
_gdk_visual_get_x11_colormap (GdkVisual *visual)
{
GdkX11Visual *x11_visual;
g_return_val_if_fail (GDK_IS_VISUAL (visual), None);
x11_visual = GDK_X11_VISUAL (visual);
if (x11_visual->colormap == None)
{
x11_visual->colormap = XCreateColormap (GDK_SCREEN_XDISPLAY (visual->screen),
GDK_SCREEN_XROOTWIN (visual->screen),
x11_visual->xvisual,
AllocNone);
}
return x11_visual->colormap;
}
/**
* gdk_x11_visual_get_xvisual:
* @visual: a #GdkVisual.
*
* Returns the X visual belonging to a #GdkVisual.
*
* Return value: (transfer none): an Xlib <type>Visual*</type>.
**/
Visual *
gdk_x11_visual_get_xvisual (GdkVisual *visual)
{
g_return_val_if_fail (GDK_IS_VISUAL (visual), NULL);
return GDK_X11_VISUAL (visual)->xvisual;
}
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