gtk/gdk/linux-fb/gdkvisual-fb.c

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2000-05-31 21:50:38 +00:00
/* 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 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.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. 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 "gdkvisual.h"
#include "gdkprivate-fb.h"
#include "gdkinternals.h"
#include <endian.h>
static GdkVisual *system_visual = NULL;
#ifdef G_ENABLE_DEBUG
#if 0
static const gchar* visual_names[] =
{
"static gray",
"grayscale",
"static color",
"pseudo color",
"true color",
"direct color",
};
#endif
#endif /* G_ENABLE_DEBUG */
void
gdk_visual_init (void)
{
system_visual = g_new0(GdkVisual, 1);
system_visual->depth = system_visual->bits_per_rgb = gdk_display->modeinfo.bits_per_pixel;
system_visual->byte_order = GDK_LSB_FIRST;
system_visual->colormap_size = 0;
switch(gdk_display->sinfo.visual)
{
case FB_VISUAL_PSEUDOCOLOR:
system_visual->colormap_size = 1 << gdk_display->modeinfo.bits_per_pixel;
system_visual->type = GDK_VISUAL_PSEUDO_COLOR;
break;
case FB_VISUAL_DIRECTCOLOR:
system_visual->colormap_size = 1 << gdk_display->modeinfo.bits_per_pixel;
system_visual->type = GDK_VISUAL_DIRECT_COLOR;
case FB_VISUAL_TRUECOLOR:
if(gdk_display->sinfo.visual == GDK_VISUAL_TRUE_COLOR)
system_visual->type = GDK_VISUAL_TRUE_COLOR;
system_visual->red_prec = MIN(system_visual->depth / 3, 8);
system_visual->red_shift = 0;
system_visual->red_mask = ((1 << (system_visual->red_prec + 1)) - 1) << system_visual->red_shift;
system_visual->green_shift = system_visual->red_prec;
system_visual->green_prec = MIN(system_visual->depth / 3, 8);
system_visual->green_mask = ((1 << (system_visual->green_prec + 1)) - 1) << system_visual->green_shift;
system_visual->blue_shift = system_visual->green_prec + system_visual->green_shift;
system_visual->blue_prec = MIN(system_visual->depth / 3, 8);
system_visual->blue_mask = ((1 << (system_visual->blue_prec + 1)) - 1) << system_visual->blue_shift;
break;
case FB_VISUAL_STATIC_PSEUDOCOLOR:
system_visual->type = GDK_VISUAL_STATIC_COLOR;
system_visual->colormap_size = 1 << gdk_display->modeinfo.bits_per_pixel;
break;
default:
g_assert_not_reached();
break;
}
}
GdkVisual*
gdk_visual_ref (GdkVisual *visual)
{
return visual;
}
void
gdk_visual_unref (GdkVisual *visual)
{
}
gint
gdk_visual_get_best_depth (void)
{
return system_visual->depth;
}
GdkVisualType
gdk_visual_get_best_type (void)
{
return system_visual->type;
}
GdkVisual*
gdk_visual_get_system (void)
{
return system_visual;
}
GdkVisual*
gdk_visual_get_best (void)
{
return system_visual;
}
GdkVisual*
gdk_visual_get_best_with_depth (gint depth)
{
if(system_visual->depth != depth)
return NULL;
return system_visual;
}
GdkVisual*
gdk_visual_get_best_with_type (GdkVisualType visual_type)
{
if(system_visual->type != visual_type)
return NULL;
return system_visual;
}
GdkVisual*
gdk_visual_get_best_with_both (gint depth,
GdkVisualType visual_type)
{
if(system_visual->depth != depth)
return NULL;
if(system_visual->type != visual_type)
return NULL;
return 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_list_visuals (void)
{
return g_list_append(NULL, gdk_visual_get_system());
}