gtk/gdk/quartz/gdkvisual-quartz.c
Kristian Rietveld 18b233fe2a Add gray visual, implement "get_best" functions
(cherry picked from commit 42d07ad6ce)
2010-06-27 10:59:11 +02:00

265 lines
5.5 KiB
C

/* gdkvisual-quartz.c
*
* Copyright (C) 2005 Imendio AB
*
* 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.
*/
#include "config.h"
#include "gdkvisual.h"
#include "gdkprivate-quartz.h"
static GdkVisual *system_visual;
static GdkVisual *rgba_visual;
static GdkVisual *gray_visual;
static void
gdk_visual_finalize (GObject *object)
{
g_error ("A GdkVisual object was finalized. This should not happen");
}
static void
gdk_visual_class_init (GObjectClass *class)
{
class->finalize = gdk_visual_finalize;
}
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) gdk_visual_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkVisual),
0, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
object_type = g_type_register_static (G_TYPE_OBJECT,
"GdkVisual",
&object_info, 0);
}
return object_type;
}
static void
gdk_visual_decompose_mask (gulong mask,
gint *shift,
gint *prec)
{
*shift = 0;
*prec = 0;
while (!(mask & 0x1))
{
(*shift)++;
mask >>= 1;
}
while (mask & 0x1)
{
(*prec)++;
mask >>= 1;
}
}
static GdkVisual *
create_standard_visual (gint depth)
{
GdkVisual *visual = g_object_new (GDK_TYPE_VISUAL, NULL);
visual->depth = depth;
visual->byte_order = GDK_MSB_FIRST; /* FIXME: Should this be different on intel macs? */
visual->colormap_size = 0;
visual->type = GDK_VISUAL_TRUE_COLOR;
visual->red_mask = 0xff0000;
visual->green_mask = 0xff00;
visual->blue_mask = 0xff;
gdk_visual_decompose_mask (visual->red_mask,
&visual->red_shift,
&visual->red_prec);
gdk_visual_decompose_mask (visual->green_mask,
&visual->green_shift,
&visual->green_prec);
gdk_visual_decompose_mask (visual->blue_mask,
&visual->blue_shift,
&visual->blue_prec);
return visual;
}
static GdkVisual *
create_gray_visual (void)
{
GdkVisual *visual = g_object_new (GDK_TYPE_VISUAL, NULL);
visual->depth = 1;
visual->byte_order = GDK_MSB_FIRST;
visual->colormap_size = 0;
visual->type = GDK_VISUAL_STATIC_GRAY;
return visual;
}
void
_gdk_visual_init (void)
{
system_visual = create_standard_visual (24);
rgba_visual = create_standard_visual (32);
gray_visual = create_gray_visual ();
}
/* We prefer the system visual for now ... */
gint
gdk_visual_get_best_depth (void)
{
return system_visual->depth;
}
GdkVisualType
gdk_visual_get_best_type (void)
{
return system_visual->type;
}
GdkVisual *
gdk_screen_get_rgba_visual (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return rgba_visual;
}
GdkVisual*
gdk_screen_get_system_visual (GdkScreen *screen)
{
return system_visual;
}
GdkVisual*
gdk_visual_get_best (void)
{
return system_visual;
}
GdkVisual*
gdk_visual_get_best_with_depth (gint depth)
{
GdkVisual *visual = NULL;
switch (depth)
{
case 32:
visual = rgba_visual;
break;
case 24:
visual = system_visual;
break;
case 1:
visual = gray_visual;
break;
default:
visual = NULL;
}
return visual;
}
GdkVisual*
gdk_visual_get_best_with_type (GdkVisualType visual_type)
{
if (system_visual->type == visual_type)
return system_visual;
else if (gray_visual->type == visual_type)
return gray_visual;
return NULL;
}
GdkVisual*
gdk_visual_get_best_with_both (gint depth,
GdkVisualType visual_type)
{
if (system_visual->depth == depth
&& system_visual->type == visual_type)
return system_visual;
else if (rgba_visual->depth == depth
&& rgba_visual->type == visual_type)
return rgba_visual;
else if (gray_visual->depth == depth
&& gray_visual->type == visual_type)
return gray_visual;
return NULL;
}
/* For these, we also prefer the system visual */
void
gdk_query_depths (gint **depths,
gint *count)
{
*count = 1;
*depths = &system_visual->depth;
}
void
gdk_query_visual_types (GdkVisualType **visual_types,
gint *count)
{
*count = 1;
*visual_types = &system_visual->type;
}
GList*
gdk_screen_list_visuals (GdkScreen *screen)
{
GList *visuals = NULL;
visuals = g_list_append (visuals, system_visual);
visuals = g_list_append (visuals, rgba_visual);
visuals = g_list_append (visuals, gray_visual);
return visuals;
}
GdkScreen *
gdk_visual_get_screen (GdkVisual *visual)
{
g_return_val_if_fail (GDK_IS_VISUAL (visual), NULL);
return gdk_screen_get_default ();
}