/* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* 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 <X11/Xlib.h>
#include <X11/Xutil.h>
#include "gdkx.h"
#include "gdkvisual.h"
#include "gdkprivate-x11.h"
#include "gdkscreen-x11.h"
#include "gdkinternals.h"
#include "gdkalias.h"
struct _GdkVisualClass
{
GObjectClass parent_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 */
GType
gdk_visual_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
const GTypeInfo object_info =
{
sizeof (GdkVisualClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) NULL,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkVisualPrivate),
0, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
object_type = g_type_register_static (G_TYPE_OBJECT,
g_intern_static_string ("GdkVisual"),
&object_info, 0);
}
return object_type;
}
void
_gdk_visual_init (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
};
GdkScreenX11 *screen_x11;
XVisualInfo *visual_list;
XVisualInfo visual_template;
GdkVisualPrivate *temp_visual;
Visual *default_xvisual;
GdkVisualPrivate **visuals;
int nxvisuals;
int nvisuals;
int i, j;
g_return_if_fail (GDK_IS_SCREEN (screen));
screen_x11 = GDK_SCREEN_X11 (screen);
nxvisuals = 0;
visual_template.screen = screen_x11->screen_num;
visual_list = XGetVisualInfo (screen_x11->xdisplay, VisualScreenMask, &visual_template, &nxvisuals);
visuals = g_new (GdkVisualPrivate *, nxvisuals);
for (i = 0; i < nxvisuals; i++)
visuals[i] = g_object_new (GDK_TYPE_VISUAL, NULL);
default_xvisual = DefaultVisual (screen_x11->xdisplay, screen_x11->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]->visual.type = GDK_VISUAL_STATIC_GRAY;
break;
case GrayScale:
visuals[nvisuals]->visual.type = GDK_VISUAL_GRAYSCALE;
break;
case StaticColor:
visuals[nvisuals]->visual.type = GDK_VISUAL_STATIC_COLOR;
break;
case PseudoColor:
visuals[nvisuals]->visual.type = GDK_VISUAL_PSEUDO_COLOR;
break;
case TrueColor:
visuals[nvisuals]->visual.type = GDK_VISUAL_TRUE_COLOR;
break;
case DirectColor:
visuals[nvisuals]->visual.type = GDK_VISUAL_DIRECT_COLOR;
break;
}
visuals[nvisuals]->visual.depth = visual_list[i].depth;
visuals[nvisuals]->visual.byte_order =
(ImageByteOrder(screen_x11->xdisplay) == LSBFirst) ?
GDK_LSB_FIRST : GDK_MSB_FIRST;
visuals[nvisuals]->visual.red_mask = visual_list[i].red_mask;
visuals[nvisuals]->visual.green_mask = visual_list[i].green_mask;
visuals[nvisuals]->visual.blue_mask = visual_list[i].blue_mask;
visuals[nvisuals]->visual.colormap_size = visual_list[i].colormap_size;
visuals[nvisuals]->visual.bits_per_rgb = visual_list[i].bits_per_rgb;
visuals[nvisuals]->xvisual = visual_list[i].visual;
if ((visuals[nvisuals]->visual.type == GDK_VISUAL_TRUE_COLOR) ||
(visuals[nvisuals]->visual.type == GDK_VISUAL_DIRECT_COLOR))
{
gdk_visual_decompose_mask (visuals[nvisuals]->visual.red_mask,
&visuals[nvisuals]->visual.red_shift,
&visuals[nvisuals]->visual.red_prec);
gdk_visual_decompose_mask (visuals[nvisuals]->visual.green_mask,
&visuals[nvisuals]->visual.green_shift,
&visuals[nvisuals]->visual.green_prec);
gdk_visual_decompose_mask (visuals[nvisuals]->visual.blue_mask,
&visuals[nvisuals]->visual.blue_shift,
&visuals[nvisuals]->visual.blue_prec);
}
else
{
visuals[nvisuals]->visual.red_mask = 0;
visuals[nvisuals]->visual.red_shift = 0;
visuals[nvisuals]->visual.red_prec = 0;
visuals[nvisuals]->visual.green_mask = 0;
visuals[nvisuals]->visual.green_shift = 0;
visuals[nvisuals]->visual.green_prec = 0;
visuals[nvisuals]->visual.blue_mask = 0;
visuals[nvisuals]->visual.blue_shift = 0;
visuals[nvisuals]->visual.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]->visual.depth >= visuals[i]->visual.depth)
{
if ((visuals[j]->visual.depth == 8) && (visuals[i]->visual.depth == 8))
{
if (visuals[j]->visual.type == GDK_VISUAL_PSEUDO_COLOR)
{
temp_visual = visuals[j];
visuals[j] = visuals[i];
visuals[i] = temp_visual;
}
else if ((visuals[i]->visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
visuals[j]->visual.type > visuals[i]->visual.type)
{
temp_visual = visuals[j];
visuals[j] = visuals[i];
visuals[i] = temp_visual;
}
}
else if ((visuals[j]->visual.depth > visuals[i]->visual.depth) ||
((visuals[j]->visual.depth == visuals[i]->visual.depth) &&
(visuals[j]->visual.type > visuals[i]->visual.type)))
{
temp_visual = visuals[j];
visuals[j] = visuals[i];
visuals[i] = temp_visual;
}
}
}
}
for (i = 0; i < nvisuals; i++)
{
if (default_xvisual->visualid == visuals[i]->xvisual->visualid)
screen_x11->system_visual = visuals[i];
/* 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]->visual.depth == 32 &&
(visuals[i]->visual.red_mask == 0xff0000 &&
visuals[i]->visual.green_mask == 0x00ff00 &&
visuals[i]->visual.blue_mask == 0x0000ff))
{
screen_x11->rgba_visual = GDK_VISUAL (visuals[i]);
}
}
#ifdef G_ENABLE_DEBUG
if (_gdk_debug_flags & GDK_DEBUG_MISC)
for (i = 0; i < nvisuals; i++)
g_message ("visual: %s: %d",
visual_names[visuals[i]->visual.type],
visuals[i]->visual.depth);
#endif /* G_ENABLE_DEBUG */
screen_x11->navailable_depths = 0;
for (i = 0; i < G_N_ELEMENTS (possible_depths); i++)
{
for (j = 0; j < nvisuals; j++)
{
if (visuals[j]->visual.depth == possible_depths[i])
{
screen_x11->available_depths[screen_x11->navailable_depths++] = visuals[j]->visual.depth;
break;
}
}
}
if (screen_x11->navailable_depths == 0)
g_error ("unable to find a usable depth");
screen_x11->navailable_types = 0;
for (i = 0; i < G_N_ELEMENTS (possible_types); i++)
{
for (j = 0; j < nvisuals; j++)
{
if (visuals[j]->visual.type == possible_types[i])
{
screen_x11->available_types[screen_x11->navailable_types++] = visuals[j]->visual.type;
break;
}
}
}
for (i = 0; i < nvisuals; i++)
gdk_visual_add ((GdkVisual*) visuals[i]);
if (screen_x11->navailable_types == 0)
g_error ("unable to find a usable visual type");
screen_x11->visuals = visuals;
screen_x11->nvisuals = nvisuals;
}
/**
* gdk_visual_get_best_depth:
*
* Get the best available depth for the default GDK screen. "Best"
* means "largest," i.e. 32 preferred over 24 preferred over 8 bits
* per pixel.
*
* Return value: best available depth
**/
gint
gdk_visual_get_best_depth (void)
{
GdkScreen *screen = gdk_screen_get_default();
return GDK_SCREEN_X11 (screen)->available_depths[0];
}
/**
* gdk_visual_get_best_type:
*
* Return the best available visual type for the default GDK screen.
*
* Return value: best visual type
**/
GdkVisualType
gdk_visual_get_best_type (void)
{
GdkScreen *screen = gdk_screen_get_default();
return GDK_SCREEN_X11 (screen)->available_types[0];
}
/**
* gdk_screen_get_system_visual:
* @screen: a #GdkScreen.
*
* Get the system's default visual for @screen.
* This is the visual for the root window of the display.
* The return value should not be freed.
*
* Return value: (transfer none): the system visual
*
* Since: 2.2
**/
GdkVisual *
gdk_screen_get_system_visual (GdkScreen * screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return ((GdkVisual *) GDK_SCREEN_X11 (screen)->system_visual);
}
/**
* gdk_visual_get_best:
*
* Get the visual with the most available colors for the default
* GDK screen. The return value should not be freed.
*
* Return value: (transfer none): best visual
**/
GdkVisual*
gdk_visual_get_best (void)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default());
return (GdkVisual *)screen_x11->visuals[0];
}
/**
* gdk_visual_get_best_with_depth:
* @depth: a bit depth
*
* Get the best visual with depth @depth for the default GDK screen.
* Color visuals and visuals with mutable colormaps are preferred
* over grayscale or fixed-colormap visuals. The return value should not
* be freed. %NULL may be returned if no visual supports @depth.
*
* Return value: (transfer none): best visual for the given depth
**/
GdkVisual*
gdk_visual_get_best_with_depth (gint depth)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < screen_x11->nvisuals; i++)
if (depth == screen_x11->visuals[i]->visual.depth)
{
return_val = (GdkVisual *) screen_x11->visuals[i];
break;
}
return return_val;
}
/**
* gdk_visual_get_best_with_type:
* @visual_type: a visual type
*
* Get the best visual of the given @visual_type for the default GDK screen.
* Visuals with higher color depths are considered better. The return value
* should not be freed. %NULL may be returned if no visual has type
* @visual_type.
*
* Return value: (transfer none): best visual of the given type
**/
GdkVisual*
gdk_visual_get_best_with_type (GdkVisualType visual_type)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < screen_x11->nvisuals; i++)
if (visual_type == screen_x11->visuals[i]->visual.type)
{
return_val = (GdkVisual *) screen_x11->visuals[i];
break;
}
return return_val;
}
/**
* gdk_visual_get_best_with_both:
* @depth: a bit depth
* @visual_type: a visual type
*
* Combines gdk_visual_get_best_with_depth() and gdk_visual_get_best_with_type().
*
* Return value: (transfer none): best visual with both @depth and
* @visual_type, or %NULL if none
**/
GdkVisual*
gdk_visual_get_best_with_both (gint depth,
GdkVisualType visual_type)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < screen_x11->nvisuals; i++)
if ((depth == screen_x11->visuals[i]->visual.depth) &&
(visual_type == screen_x11->visuals[i]->visual.type))
{
return_val = (GdkVisual *) screen_x11->visuals[i];
break;
}
return return_val;
}
/**
* gdk_query_depths:
* @depths: (out) (array): return location for available depths
* @count: (out): return location for number of available depths
*
* This function returns the available bit depths for the default
* screen. It's equivalent to listing the visuals
* (gdk_list_visuals()) and then looking at the depth field in each
* visual, removing duplicates.
*
* The array returned by this function should not be freed.
*
**/
void
gdk_query_depths (gint **depths,
gint *count)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
*count = screen_x11->navailable_depths;
*depths = screen_x11->available_depths;
}
/**
* gdk_query_visual_types:
* @visual_types: return location for the available visual types
* @count: return location for the number of available visual types
*
* This function returns the available visual types for the default
* screen. It's equivalent to listing the visuals
* (gdk_list_visuals()) and then looking at the type field in each
* visual, removing duplicates.
*
* The array returned by this function should not be freed.
**/
void
gdk_query_visual_types (GdkVisualType **visual_types,
gint *count)
{
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
*count = screen_x11->navailable_types;
*visual_types = screen_x11->available_types;
}
/**
* gdk_screen_list_visuals:
* @screen: the relevant #GdkScreen.
*
* Lists the available visuals for the specified @screen.
* A visual describes a hardware image data format.
* For example, a visual might support 24-bit color, or 8-bit color,
* and might expect pixels to be in a certain format.
*
* Call g_list_free() on the return value when you're finished with it.
*
* Return value: (transfer container) (element-type GdkVisual):
* a list of visuals; the list must be freed, but not its contents
*
* Since: 2.2
**/
GList *
gdk_screen_list_visuals (GdkScreen *screen)
{
GList *list;
GdkScreenX11 *screen_x11;
guint i;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
list = NULL;
for (i = 0; i < screen_x11->nvisuals; ++i)
list = g_list_append (list, screen_x11->visuals[i]);
return list;
}
/**
* gdk_x11_screen_lookup_visual:
* @screen: 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;
GdkScreenX11 *screen_x11;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
screen_x11 = GDK_SCREEN_X11 (screen);
for (i = 0; i < screen_x11->nvisuals; i++)
if (xvisualid == screen_x11->visuals[i]->xvisual->visualid)
return (GdkVisual *) screen_x11->visuals[i];
return NULL;
}
/**
* gdkx_visual_get:
* @xvisualid: a X visual id.
*
* Returns a #GdkVisual corresponding to a X visual.
*
* Return value: the #GdkVisual.
*
* Deprecated:2.24: Use gdk_x11_screen_lookup_visual() instead
*/
GdkVisual*
gdkx_visual_get (VisualID xvisualid)
{
return gdk_x11_screen_lookup_visual (gdk_screen_get_default (), xvisualid);
}
static void
gdk_visual_add (GdkVisual *visual)
{
GdkVisualPrivate *private = (GdkVisualPrivate *) visual;
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (private->screen);
if (!screen_x11->visual_hash)
screen_x11->visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
(GEqualFunc) gdk_visual_equal);
g_hash_table_insert (screen_x11->visual_hash, private->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_x11_visual_get_xvisual:
* @visual: a #GdkVisual.
*
* Returns the X visual belonging to a #GdkVisual.
*
* Return value: an Xlib <type>Visual*</type>.
**/
Visual *
gdk_x11_visual_get_xvisual (GdkVisual *visual)
{
g_return_val_if_fail (visual != NULL, NULL);
return ((GdkVisualPrivate*) visual)->xvisual;
}
/**
* gdk_visual_get_screen:
* @visual: a #GdkVisual
*
* Gets the screen to which this visual belongs
*
* Return value: (transfer none): the screen to which this visual belongs.
*
* Since: 2.2
**/
GdkScreen *
gdk_visual_get_screen (GdkVisual *visual)
{
g_return_val_if_fail (GDK_IS_VISUAL (visual), NULL);
return ((GdkVisualPrivate*) visual)->screen;
}
#define __GDK_VISUAL_X11_C__
#include "gdkaliasdef.c"