forked from AuroraMiddleware/gtk
678 lines
18 KiB
C
678 lines
18 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "gdkx.h"
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#include "gdkvisual.h"
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#include "gdkprivate-x11.h"
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#include "gdkscreen-x11.h"
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#include "gdkinternals.h"
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#include "gdkalias.h"
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struct _GdkVisualClass
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{
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GObjectClass parent_class;
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};
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static void gdk_visual_add (GdkVisual *visual);
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static void gdk_visual_decompose_mask (gulong mask,
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gint *shift,
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gint *prec);
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static guint gdk_visual_hash (Visual *key);
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static gboolean gdk_visual_equal (Visual *a,
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Visual *b);
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#ifdef G_ENABLE_DEBUG
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static const gchar *const visual_names[] =
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{
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"static gray",
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"grayscale",
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"static color",
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"pseudo color",
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"true color",
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"direct color",
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};
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#endif /* G_ENABLE_DEBUG */
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GType
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gdk_visual_get_type (void)
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{
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static GType object_type = 0;
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if (!object_type)
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{
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const GTypeInfo object_info =
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{
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sizeof (GdkVisualClass),
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(GBaseInitFunc) NULL,
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(GBaseFinalizeFunc) NULL,
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(GClassInitFunc) NULL,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GdkVisualPrivate),
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0, /* n_preallocs */
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(GInstanceInitFunc) NULL,
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};
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object_type = g_type_register_static (G_TYPE_OBJECT,
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g_intern_static_string ("GdkVisual"),
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&object_info, 0);
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}
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return object_type;
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}
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void
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_gdk_visual_init (GdkScreen *screen)
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{
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static const gint possible_depths[8] = { 32, 30, 24, 16, 15, 8, 4, 1 };
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static const GdkVisualType possible_types[6] =
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{
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GDK_VISUAL_DIRECT_COLOR,
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GDK_VISUAL_TRUE_COLOR,
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GDK_VISUAL_PSEUDO_COLOR,
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GDK_VISUAL_STATIC_COLOR,
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GDK_VISUAL_GRAYSCALE,
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GDK_VISUAL_STATIC_GRAY
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};
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GdkScreenX11 *screen_x11;
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XVisualInfo *visual_list;
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XVisualInfo visual_template;
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GdkVisualPrivate *temp_visual;
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Visual *default_xvisual;
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GdkVisualPrivate **visuals;
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int nxvisuals;
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int nvisuals;
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int i, j;
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g_return_if_fail (GDK_IS_SCREEN (screen));
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screen_x11 = GDK_SCREEN_X11 (screen);
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nxvisuals = 0;
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visual_template.screen = screen_x11->screen_num;
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visual_list = XGetVisualInfo (screen_x11->xdisplay, VisualScreenMask, &visual_template, &nxvisuals);
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visuals = g_new (GdkVisualPrivate *, nxvisuals);
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for (i = 0; i < nxvisuals; i++)
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visuals[i] = g_object_new (GDK_TYPE_VISUAL, NULL);
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default_xvisual = DefaultVisual (screen_x11->xdisplay, screen_x11->screen_num);
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nvisuals = 0;
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for (i = 0; i < nxvisuals; i++)
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{
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visuals[nvisuals]->screen = screen;
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if (visual_list[i].depth >= 1)
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{
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#ifdef __cplusplus
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switch (visual_list[i].c_class)
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#else /* __cplusplus */
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switch (visual_list[i].class)
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#endif /* __cplusplus */
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{
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case StaticGray:
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visuals[nvisuals]->visual.type = GDK_VISUAL_STATIC_GRAY;
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break;
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case GrayScale:
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visuals[nvisuals]->visual.type = GDK_VISUAL_GRAYSCALE;
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break;
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case StaticColor:
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visuals[nvisuals]->visual.type = GDK_VISUAL_STATIC_COLOR;
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break;
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case PseudoColor:
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visuals[nvisuals]->visual.type = GDK_VISUAL_PSEUDO_COLOR;
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break;
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case TrueColor:
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visuals[nvisuals]->visual.type = GDK_VISUAL_TRUE_COLOR;
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break;
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case DirectColor:
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visuals[nvisuals]->visual.type = GDK_VISUAL_DIRECT_COLOR;
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break;
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}
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visuals[nvisuals]->visual.depth = visual_list[i].depth;
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visuals[nvisuals]->visual.byte_order =
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(ImageByteOrder(screen_x11->xdisplay) == LSBFirst) ?
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GDK_LSB_FIRST : GDK_MSB_FIRST;
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visuals[nvisuals]->visual.red_mask = visual_list[i].red_mask;
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visuals[nvisuals]->visual.green_mask = visual_list[i].green_mask;
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visuals[nvisuals]->visual.blue_mask = visual_list[i].blue_mask;
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visuals[nvisuals]->visual.colormap_size = visual_list[i].colormap_size;
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visuals[nvisuals]->visual.bits_per_rgb = visual_list[i].bits_per_rgb;
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visuals[nvisuals]->xvisual = visual_list[i].visual;
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if ((visuals[nvisuals]->visual.type == GDK_VISUAL_TRUE_COLOR) ||
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(visuals[nvisuals]->visual.type == GDK_VISUAL_DIRECT_COLOR))
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{
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gdk_visual_decompose_mask (visuals[nvisuals]->visual.red_mask,
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&visuals[nvisuals]->visual.red_shift,
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&visuals[nvisuals]->visual.red_prec);
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gdk_visual_decompose_mask (visuals[nvisuals]->visual.green_mask,
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&visuals[nvisuals]->visual.green_shift,
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&visuals[nvisuals]->visual.green_prec);
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gdk_visual_decompose_mask (visuals[nvisuals]->visual.blue_mask,
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&visuals[nvisuals]->visual.blue_shift,
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&visuals[nvisuals]->visual.blue_prec);
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}
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else
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{
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visuals[nvisuals]->visual.red_mask = 0;
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visuals[nvisuals]->visual.red_shift = 0;
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visuals[nvisuals]->visual.red_prec = 0;
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visuals[nvisuals]->visual.green_mask = 0;
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visuals[nvisuals]->visual.green_shift = 0;
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visuals[nvisuals]->visual.green_prec = 0;
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visuals[nvisuals]->visual.blue_mask = 0;
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visuals[nvisuals]->visual.blue_shift = 0;
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visuals[nvisuals]->visual.blue_prec = 0;
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}
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nvisuals += 1;
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}
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}
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if (visual_list)
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XFree (visual_list);
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for (i = 0; i < nvisuals; i++)
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{
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for (j = i+1; j < nvisuals; j++)
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{
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if (visuals[j]->visual.depth >= visuals[i]->visual.depth)
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{
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if ((visuals[j]->visual.depth == 8) && (visuals[i]->visual.depth == 8))
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{
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if (visuals[j]->visual.type == GDK_VISUAL_PSEUDO_COLOR)
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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else if ((visuals[i]->visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
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visuals[j]->visual.type > visuals[i]->visual.type)
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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}
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else if ((visuals[j]->visual.depth > visuals[i]->visual.depth) ||
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((visuals[j]->visual.depth == visuals[i]->visual.depth) &&
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(visuals[j]->visual.type > visuals[i]->visual.type)))
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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}
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}
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}
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for (i = 0; i < nvisuals; i++)
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{
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if (default_xvisual->visualid == visuals[i]->xvisual->visualid)
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screen_x11->system_visual = visuals[i];
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/* For now, we only support 8888 ARGB for the "rgba visual".
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* Additional formats (like ABGR) could be added later if they
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* turn up.
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*/
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if (visuals[i]->visual.depth == 32 &&
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(visuals[i]->visual.red_mask == 0xff0000 &&
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visuals[i]->visual.green_mask == 0x00ff00 &&
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visuals[i]->visual.blue_mask == 0x0000ff))
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{
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screen_x11->rgba_visual = GDK_VISUAL (visuals[i]);
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}
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}
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#ifdef G_ENABLE_DEBUG
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if (_gdk_debug_flags & GDK_DEBUG_MISC)
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for (i = 0; i < nvisuals; i++)
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g_message ("visual: %s: %d",
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visual_names[visuals[i]->visual.type],
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visuals[i]->visual.depth);
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#endif /* G_ENABLE_DEBUG */
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screen_x11->navailable_depths = 0;
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for (i = 0; i < G_N_ELEMENTS (possible_depths); i++)
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{
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for (j = 0; j < nvisuals; j++)
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{
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if (visuals[j]->visual.depth == possible_depths[i])
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{
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screen_x11->available_depths[screen_x11->navailable_depths++] = visuals[j]->visual.depth;
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break;
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}
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}
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}
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if (screen_x11->navailable_depths == 0)
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g_error ("unable to find a usable depth");
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screen_x11->navailable_types = 0;
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for (i = 0; i < G_N_ELEMENTS (possible_types); i++)
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{
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for (j = 0; j < nvisuals; j++)
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{
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if (visuals[j]->visual.type == possible_types[i])
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{
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screen_x11->available_types[screen_x11->navailable_types++] = visuals[j]->visual.type;
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break;
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}
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}
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}
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for (i = 0; i < nvisuals; i++)
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gdk_visual_add ((GdkVisual*) visuals[i]);
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if (screen_x11->navailable_types == 0)
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g_error ("unable to find a usable visual type");
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screen_x11->visuals = visuals;
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screen_x11->nvisuals = nvisuals;
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}
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/**
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* gdk_visual_get_best_depth:
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*
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* Get the best available depth for the default GDK screen. "Best"
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* means "largest," i.e. 32 preferred over 24 preferred over 8 bits
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* per pixel.
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*
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* Return value: best available depth
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**/
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gint
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gdk_visual_get_best_depth (void)
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{
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GdkScreen *screen = gdk_screen_get_default();
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return GDK_SCREEN_X11 (screen)->available_depths[0];
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}
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/**
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* gdk_visual_get_best_type:
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*
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* Return the best available visual type for the default GDK screen.
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*
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* Return value: best visual type
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**/
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GdkVisualType
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gdk_visual_get_best_type (void)
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{
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GdkScreen *screen = gdk_screen_get_default();
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return GDK_SCREEN_X11 (screen)->available_types[0];
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}
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/**
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* gdk_screen_get_system_visual:
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* @screen: a #GdkScreen.
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*
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* Get the system's default visual for @screen.
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* This is the visual for the root window of the display.
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* The return value should not be freed.
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*
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* Return value: (transfer none): the system visual
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*
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* Since: 2.2
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**/
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GdkVisual *
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gdk_screen_get_system_visual (GdkScreen * screen)
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{
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g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
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return ((GdkVisual *) GDK_SCREEN_X11 (screen)->system_visual);
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}
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/**
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* gdk_visual_get_best:
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*
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* Get the visual with the most available colors for the default
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* GDK screen. The return value should not be freed.
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*
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* Return value: (transfer none): best visual
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**/
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GdkVisual*
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gdk_visual_get_best (void)
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{
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GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default());
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return (GdkVisual *)screen_x11->visuals[0];
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}
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/**
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* gdk_visual_get_best_with_depth:
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* @depth: a bit depth
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*
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* Get the best visual with depth @depth for the default GDK screen.
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* Color visuals and visuals with mutable colormaps are preferred
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* over grayscale or fixed-colormap visuals. The return value should not
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* be freed. %NULL may be returned if no visual supports @depth.
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*
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* Return value: (transfer none): best visual for the given depth
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**/
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GdkVisual*
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gdk_visual_get_best_with_depth (gint depth)
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{
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GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < screen_x11->nvisuals; i++)
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if (depth == screen_x11->visuals[i]->visual.depth)
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{
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return_val = (GdkVisual *) screen_x11->visuals[i];
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break;
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}
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return return_val;
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}
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/**
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* gdk_visual_get_best_with_type:
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* @visual_type: a visual type
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*
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* Get the best visual of the given @visual_type for the default GDK screen.
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* Visuals with higher color depths are considered better. The return value
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* should not be freed. %NULL may be returned if no visual has type
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* @visual_type.
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*
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* Return value: (transfer none): best visual of the given type
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**/
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GdkVisual*
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gdk_visual_get_best_with_type (GdkVisualType visual_type)
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{
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GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < screen_x11->nvisuals; i++)
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if (visual_type == screen_x11->visuals[i]->visual.type)
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{
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return_val = (GdkVisual *) screen_x11->visuals[i];
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break;
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}
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return return_val;
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}
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/**
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* gdk_visual_get_best_with_both:
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* @depth: a bit depth
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* @visual_type: a visual type
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*
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* Combines gdk_visual_get_best_with_depth() and gdk_visual_get_best_with_type().
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*
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* Return value: (transfer none): best visual with both @depth and
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* @visual_type, or %NULL if none
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**/
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GdkVisual*
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gdk_visual_get_best_with_both (gint depth,
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GdkVisualType visual_type)
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{
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GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < screen_x11->nvisuals; i++)
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if ((depth == screen_x11->visuals[i]->visual.depth) &&
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(visual_type == screen_x11->visuals[i]->visual.type))
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{
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return_val = (GdkVisual *) screen_x11->visuals[i];
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break;
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}
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return return_val;
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}
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/**
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* gdk_query_depths:
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* @depths: (out) (array): return location for available depths
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* @count: (out): return location for number of available depths
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*
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* This function returns the available bit depths for the default
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* screen. It's equivalent to listing the visuals
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* (gdk_list_visuals()) and then looking at the depth field in each
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* visual, removing duplicates.
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*
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* The array returned by this function should not be freed.
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*
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**/
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void
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gdk_query_depths (gint **depths,
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gint *count)
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{
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GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
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*count = screen_x11->navailable_depths;
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*depths = screen_x11->available_depths;
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}
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/**
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* gdk_query_visual_types:
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* @visual_types: return location for the available visual types
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* @count: return location for the number of available visual types
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*
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* This function returns the available visual types for the default
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* screen. It's equivalent to listing the visuals
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* (gdk_list_visuals()) and then looking at the type field in each
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* visual, removing duplicates.
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*
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* The array returned by this function should not be freed.
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**/
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void
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gdk_query_visual_types (GdkVisualType **visual_types,
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gint *count)
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{
|
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GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (gdk_screen_get_default ());
|
|
|
|
*count = screen_x11->navailable_types;
|
|
*visual_types = screen_x11->available_types;
|
|
}
|
|
|
|
/**
|
|
* gdk_screen_list_visuals:
|
|
* @screen: the relevant #GdkScreen.
|
|
*
|
|
* Lists the available visuals for the specified @screen.
|
|
* A visual describes a hardware image data format.
|
|
* For example, a visual might support 24-bit color, or 8-bit color,
|
|
* and might expect pixels to be in a certain format.
|
|
*
|
|
* Call g_list_free() on the return value when you're finished with it.
|
|
*
|
|
* Return value: (transfer container) (element-type GdkVisual):
|
|
* a list of visuals; the list must be freed, but not its contents
|
|
*
|
|
* Since: 2.2
|
|
**/
|
|
GList *
|
|
gdk_screen_list_visuals (GdkScreen *screen)
|
|
{
|
|
GList *list;
|
|
GdkScreenX11 *screen_x11;
|
|
guint i;
|
|
|
|
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
|
|
screen_x11 = GDK_SCREEN_X11 (screen);
|
|
|
|
list = NULL;
|
|
|
|
for (i = 0; i < screen_x11->nvisuals; ++i)
|
|
list = g_list_append (list, screen_x11->visuals[i]);
|
|
|
|
return list;
|
|
}
|
|
|
|
/**
|
|
* gdk_x11_screen_lookup_visual:
|
|
* @screen: a #GdkScreen.
|
|
* @xvisualid: an X Visual ID.
|
|
*
|
|
* Looks up the #GdkVisual for a particular screen and X Visual ID.
|
|
*
|
|
* Returns: the #GdkVisual (owned by the screen object), or %NULL
|
|
* if the visual ID wasn't found.
|
|
*
|
|
* Since: 2.2
|
|
*/
|
|
GdkVisual *
|
|
gdk_x11_screen_lookup_visual (GdkScreen *screen,
|
|
VisualID xvisualid)
|
|
{
|
|
int i;
|
|
GdkScreenX11 *screen_x11;
|
|
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
|
|
screen_x11 = GDK_SCREEN_X11 (screen);
|
|
|
|
for (i = 0; i < screen_x11->nvisuals; i++)
|
|
if (xvisualid == screen_x11->visuals[i]->xvisual->visualid)
|
|
return (GdkVisual *) screen_x11->visuals[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gdkx_visual_get:
|
|
* @xvisualid: a X visual id.
|
|
*
|
|
* Returns a #GdkVisual corresponding to a X visual.
|
|
*
|
|
* Return value: the #GdkVisual.
|
|
**/
|
|
GdkVisual*
|
|
gdkx_visual_get (VisualID xvisualid)
|
|
{
|
|
return gdk_x11_screen_lookup_visual (gdk_screen_get_default (), xvisualid);
|
|
}
|
|
|
|
static void
|
|
gdk_visual_add (GdkVisual *visual)
|
|
{
|
|
GdkVisualPrivate *private = (GdkVisualPrivate *) visual;
|
|
GdkScreenX11 *screen_x11 = GDK_SCREEN_X11 (private->screen);
|
|
|
|
if (!screen_x11->visual_hash)
|
|
screen_x11->visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
|
|
(GEqualFunc) gdk_visual_equal);
|
|
|
|
g_hash_table_insert (screen_x11->visual_hash, private->xvisual, visual);
|
|
}
|
|
|
|
static void
|
|
gdk_visual_decompose_mask (gulong mask,
|
|
gint *shift,
|
|
gint *prec)
|
|
{
|
|
*shift = 0;
|
|
*prec = 0;
|
|
|
|
if (mask == 0)
|
|
{
|
|
g_warning ("Mask is 0 in visual. Server bug ?");
|
|
return;
|
|
}
|
|
|
|
while (!(mask & 0x1))
|
|
{
|
|
(*shift)++;
|
|
mask >>= 1;
|
|
}
|
|
|
|
while (mask & 0x1)
|
|
{
|
|
(*prec)++;
|
|
mask >>= 1;
|
|
}
|
|
}
|
|
|
|
static guint
|
|
gdk_visual_hash (Visual *key)
|
|
{
|
|
return key->visualid;
|
|
}
|
|
|
|
static gboolean
|
|
gdk_visual_equal (Visual *a,
|
|
Visual *b)
|
|
{
|
|
return (a->visualid == b->visualid);
|
|
}
|
|
|
|
/**
|
|
* gdk_x11_visual_get_xvisual:
|
|
* @visual: a #GdkVisual.
|
|
*
|
|
* Returns the X visual belonging to a #GdkVisual.
|
|
*
|
|
* Return value: an Xlib <type>Visual*</type>.
|
|
**/
|
|
Visual *
|
|
gdk_x11_visual_get_xvisual (GdkVisual *visual)
|
|
{
|
|
g_return_val_if_fail (visual != NULL, NULL);
|
|
|
|
return ((GdkVisualPrivate*) visual)->xvisual;
|
|
}
|
|
|
|
/**
|
|
* gdk_visual_get_screen:
|
|
* @visual: a #GdkVisual
|
|
*
|
|
* Gets the screen to which this visual belongs
|
|
*
|
|
* Return value: (transfer none): the screen to which this visual belongs.
|
|
*
|
|
* Since: 2.2
|
|
**/
|
|
GdkScreen *
|
|
gdk_visual_get_screen (GdkVisual *visual)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_VISUAL (visual), NULL);
|
|
|
|
return ((GdkVisualPrivate*) visual)->screen;
|
|
}
|
|
|
|
#define __GDK_VISUAL_X11_C__
|
|
#include "gdkaliasdef.c"
|