gtk2/gdk/win32/gdkvisual-win32.c
Tor Lillqvist d142187b38 Fixes to the win32 backend to actually be able to compile within a
directory hierarchy like this, with common gdk.h and gdktypes.h
for all backends. gdkrectangles.c and gdkrgb.c is copied before
compilation from the x11 backed (which still is in .., but
eventually will be in ..\x11).
1999-03-17 20:12:47 +00:00

527 lines
12 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., 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);
}