gtk/gdk/x11/gdkvisual-x11.c
Shawn Amundson 1b6fb00808 Beginnings of support for 1 bpp depth in gdk. Very minor changes.
Most of testgtk runs on 1 bpp.  Nothing much else will work until
gdkcc is used for gtk_preview and other color-intensive things.

-Shawn
1997-12-20 08:39:21 +00:00

432 lines
9.8 KiB
C

/* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include "gdk.h"
#include "gdkprivate.h"
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 gint gdk_visual_compare (Visual *a,
Visual *b);
static GdkVisualPrivate *system_visual;
static GdkVisualPrivate *visuals;
static gint nvisuals;
static gint available_depths[4];
static gint navailable_depths;
static GdkVisualType available_types[6];
static gint navailable_types;
static char* visual_names[] =
{
"static gray",
"grayscale",
"static color",
"pseudo color",
"true color",
"direct color",
};
static GHashTable *visual_hash = NULL;
void
gdk_visual_init ()
{
static gint possible_depths[6] = { 32, 24, 16, 15, 8, 1 };
static 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
};
static gint npossible_depths = 6;
static gint npossible_types = 6;
XVisualInfo *visual_list;
XVisualInfo visual_template;
GdkVisualPrivate temp_visual;
Visual *default_xvisual;
int nxvisuals;
int i, j;
visual_template.screen = gdk_screen;
visual_list = XGetVisualInfo (gdk_display, VisualScreenMask, &visual_template, &nxvisuals);
visuals = g_new (GdkVisualPrivate, nxvisuals);
default_xvisual = DefaultVisual (gdk_display, gdk_screen);
nvisuals = 0;
for (i = 0; i < nxvisuals; i++)
{
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(gdk_display) == 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;
}
}
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)
{
system_visual = &visuals[i];
break;
}
if (gdk_debug_level >= 1)
for (i = 0; i < nvisuals; i++)
g_print ("visual: %s: %d\n",
visual_names[visuals[i].visual.type],
visuals[i].visual.depth);
navailable_depths = 0;
for (i = 0; i < npossible_depths; i++)
{
for (j = 0; j < nvisuals; j++)
{
if (visuals[j].visual.depth == possible_depths[i])
{
available_depths[navailable_depths++] = visuals[j].visual.depth;
break;
}
}
}
if (navailable_depths == 0)
g_error ("unable to find a usable depth");
navailable_types = 0;
for (i = 0; i < npossible_types; i++)
{
for (j = 0; j < nvisuals; j++)
{
if (visuals[j].visual.type == possible_types[i])
{
available_types[navailable_types++] = visuals[j].visual.type;
break;
}
}
}
for (i = 0; i < nvisuals; i++)
gdk_visual_add ((GdkVisual*) &visuals[i]);
if (npossible_types == 0)
g_error ("unable to find a usable visual type");
}
GdkVisual*
gdk_visual_ref (GdkVisual *visual)
{
return visual;
}
void
gdk_visual_unref (GdkVisual *visual)
{
return;
}
gint
gdk_visual_get_best_depth ()
{
return available_depths[0];
}
GdkVisualType
gdk_visual_get_best_type ()
{
return available_types[0];
}
GdkVisual*
gdk_visual_get_system ()
{
return ((GdkVisual*) system_visual);
}
GdkVisual*
gdk_visual_get_best ()
{
return ((GdkVisual*) &(visuals[0]));
}
GdkVisual*
gdk_visual_get_best_with_depth (gint depth)
{
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < nvisuals; i++)
if (depth == visuals[i].visual.depth)
{
return_val = (GdkVisual*) &(visuals[i]);
break;
}
return return_val;
}
GdkVisual*
gdk_visual_get_best_with_type (GdkVisualType visual_type)
{
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < nvisuals; i++)
if (visual_type == visuals[i].visual.type)
{
return_val = (GdkVisual*) &(visuals[i]);
break;
}
return return_val;
}
GdkVisual*
gdk_visual_get_best_with_both (gint depth,
GdkVisualType visual_type)
{
GdkVisual *return_val;
int i;
return_val = NULL;
for (i = 0; i < nvisuals; i++)
if ((depth == visuals[i].visual.depth) &&
(visual_type == visuals[i].visual.type))
{
return_val = (GdkVisual*) &(visuals[i]);
break;
}
return return_val;
}
void
gdk_query_depths (gint **depths,
gint *count)
{
*count = navailable_depths;
*depths = available_depths;
}
void
gdk_query_visual_types (GdkVisualType **visual_types,
gint *count)
{
*count = navailable_types;
*visual_types = available_types;
}
void
gdk_query_visuals (GdkVisual **visual_return,
gint *count)
{
*count = nvisuals;
*visual_return = (GdkVisual*) visuals;
}
GdkVisual*
gdk_visual_lookup (Visual *xvisual)
{
GdkVisual *visual;
if (!visual_hash)
return NULL;
visual = g_hash_table_lookup (visual_hash, xvisual);
return visual;
}
GdkVisual*
gdkx_visual_get (VisualID xvisualid)
{
int i;
for (i = 0; i < nvisuals; i++)
if (xvisualid == visuals[i].xvisual->visualid)
return (GdkVisual*) &visuals[i];
return NULL;
}
static void
gdk_visual_add (GdkVisual *visual)
{
GdkVisualPrivate *private;
if (!visual_hash)
visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
(GCompareFunc) gdk_visual_compare);
private = (GdkVisualPrivate*) visual;
g_hash_table_insert (visual_hash, private->xvisual, visual);
}
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 guint
gdk_visual_hash (Visual *key)
{
return key->visualid;
}
static gint
gdk_visual_compare (Visual *a,
Visual *b)
{
return (a->visualid == b->visualid);
}