gtk/gdk/win32/gdkvisual.c

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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 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 "config.h"
#include <gdk/gdk.h>
#include "gdkx.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[7];
static gint navailable_depths;
static GdkVisualType available_types[6];
static gint navailable_types;
#ifdef G_ENABLE_DEBUG
static const gchar* visual_names[] =
{
"static gray",
"grayscale",
"static color",
"pseudo color",
"true color",
"direct color",
};
#endif /* G_ENABLE_DEBUG */
static GHashTable *visual_hash = NULL;
void
gdk_visual_init (void)
{
struct
{
BITMAPINFOHEADER bi;
union
{
RGBQUAD colors[256];
DWORD fields[256];
} u;
} bmi;
HBITMAP hbm;
static const gint possible_depths[7] = { 32, 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
};
static const gint npossible_depths = sizeof(possible_depths)/sizeof(gint);
static const gint npossible_types = sizeof(possible_types)/sizeof(GdkVisualType);
int rastercaps, numcolors, sizepalette, colorres, bitspixel;
Visual *default_xvisual;
GdkVisualPrivate temp_visual;
int nxvisuals;
int i, j;
nxvisuals = 1;
visuals = g_new (GdkVisualPrivate, nxvisuals);
nvisuals = 0;
for (i = 0; i < nxvisuals; i++)
{
if (1)
{
bitspixel = GetDeviceCaps (gdk_DC, BITSPIXEL);
rastercaps = GetDeviceCaps (gdk_DC, RASTERCAPS);
default_xvisual = g_new (Visual, 1);
visuals[nvisuals].xvisual = default_xvisual;
visuals[nvisuals].xvisual->visualid = nvisuals;
visuals[nvisuals].xvisual->bitspixel = bitspixel;
if (rastercaps & RC_PALETTE)
{
visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
numcolors = GetDeviceCaps (gdk_DC, NUMCOLORS);
sizepalette = GetDeviceCaps (gdk_DC, SIZEPALETTE);
colorres = GetDeviceCaps (gdk_DC, COLORRES);
visuals[nvisuals].xvisual->map_entries = sizepalette;
}
else if (bitspixel == 1)
{
visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
visuals[nvisuals].xvisual->map_entries = 2;
}
else if (bitspixel == 4)
{
visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
visuals[nvisuals].xvisual->map_entries = 16;
}
else if (bitspixel == 8)
{
visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
visuals[nvisuals].xvisual->map_entries = 256;
}
else if (bitspixel == 16)
{
visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
#if 1
/* This code by Mike Enright,
* see http://www.users.cts.com/sd/m/menright/display.html
*/
memset (&bmi, 0, sizeof (bmi));
bmi.bi.biSize = sizeof (bmi.bi);
hbm = CreateCompatibleBitmap (gdk_DC, 1, 1);
GetDIBits (gdk_DC, hbm, 0, 1, NULL,
(BITMAPINFO *) &bmi, DIB_RGB_COLORS);
GetDIBits (gdk_DC, hbm, 0, 1, NULL,
(BITMAPINFO *) &bmi, DIB_RGB_COLORS);
DeleteObject (hbm);
if (bmi.bi.biCompression != BI_BITFIELDS)
{
/* Either BI_RGB or BI_RLE_something
* .... or perhaps (!!) something else.
* Theoretically biCompression might be
* mmioFourCC('c','v','i','d') but I doubt it.
*/
if (bmi.bi.biCompression == BI_RGB)
{
/* It's 555 */
bitspixel = 15;
visuals[nvisuals].visual.red_mask = 0x00007C00;
visuals[nvisuals].visual.green_mask = 0x000003E0;
visuals[nvisuals].visual.blue_mask = 0x0000001F;
}
else
{
g_assert_not_reached ();
}
}
else
{
DWORD allmasks =
bmi.u.fields[0] | bmi.u.fields[1] | bmi.u.fields[2];
int k = 0;
while (allmasks)
{
if (allmasks&1)
k++;
allmasks/=2;
}
bitspixel = k;
visuals[nvisuals].visual.red_mask = bmi.u.fields[0];
visuals[nvisuals].visual.green_mask = bmi.u.fields[1];
visuals[nvisuals].visual.blue_mask = bmi.u.fields[2];
}
#else
/* Old, incorrect (but still working) code. */
#if 0
visuals[nvisuals].visual.red_mask = 0x0000F800;
visuals[nvisuals].visual.green_mask = 0x000007E0;
visuals[nvisuals].visual.blue_mask = 0x0000001F;
#else
visuals[nvisuals].visual.red_mask = 0x00007C00;
visuals[nvisuals].visual.green_mask = 0x000003E0;
visuals[nvisuals].visual.blue_mask = 0x0000001F;
#endif
#endif
}
else if (bitspixel == 24 || bitspixel == 32)
{
visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
visuals[nvisuals].visual.red_mask = 0x00FF0000;
visuals[nvisuals].visual.green_mask = 0x0000FF00;
visuals[nvisuals].visual.blue_mask = 0x000000FF;
}
else
g_error ("gdk_visual_init: unsupported BITSPIXEL: %d\n", bitspixel);
visuals[nvisuals].visual.depth = bitspixel;
visuals[nvisuals].visual.byte_order = GDK_LSB_FIRST;
visuals[nvisuals].visual.bits_per_rgb = 42; /* Not used? */
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);
visuals[nvisuals].xvisual->map_entries =
1 << (MAX (visuals[nvisuals].visual.red_prec,
MAX (visuals[nvisuals].visual.green_prec,
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;
}
visuals[nvisuals].visual.colormap_size = visuals[nvisuals].xvisual->map_entries;
nvisuals += 1;
}
}
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;
}
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 (void)
{
return available_depths[0];
}
GdkVisualType
gdk_visual_get_best_type (void)
{
return available_types[0];
}
GdkVisual*
gdk_visual_get_system (void)
{
return ((GdkVisual*) system_visual);
}
GdkVisual*
gdk_visual_get_best (void)
{
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;
}
GList*
gdk_list_visuals (void)
{
GList *list;
guint i;
list = NULL;
for (i = 0; i < nvisuals; ++i)
list = g_list_append (list, (gpointer) &visuals[i]);
return list;
}
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;
}
}
/* This hash stuff is pretty useless on Windows, as there is only
one visual... */
static guint
gdk_visual_hash (Visual *key)
{
return key->visualid;
}
static gint
gdk_visual_compare (Visual *a,
Visual *b)
{
return (a->visualid == b->visualid);
}