1 /* GDK - The GIMP Drawing Kit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
28 #include <X11/Xutil.h>
30 #include "gdkvisual.h"
31 #include "gdkprivate.h"
33 static void gdk_visual_add (GdkVisual *visual);
34 static void gdk_visual_decompose_mask (gulong mask,
37 static guint gdk_visual_hash (Visual *key);
38 static gint gdk_visual_compare (Visual *a,
42 static GdkVisualPrivate *system_visual;
43 static GdkVisualPrivate *visuals;
46 static gint available_depths[7];
47 static gint navailable_depths;
49 static GdkVisualType available_types[6];
50 static gint navailable_types;
54 static const gchar* visual_names[] =
64 #endif /* G_ENABLE_DEBUG */
66 static GHashTable *visual_hash = NULL;
69 gdk_visual_init (void)
71 static const gint possible_depths[7] = { 32, 24, 16, 15, 8, 4, 1 };
72 static const GdkVisualType possible_types[6] =
74 GDK_VISUAL_DIRECT_COLOR,
75 GDK_VISUAL_TRUE_COLOR,
76 GDK_VISUAL_PSEUDO_COLOR,
77 GDK_VISUAL_STATIC_COLOR,
79 GDK_VISUAL_STATIC_GRAY
82 static const gint npossible_depths = sizeof(possible_depths)/sizeof(gint);
83 static const gint npossible_types = sizeof(possible_types)/sizeof(GdkVisualType);
85 XVisualInfo *visual_list;
86 XVisualInfo visual_template;
87 GdkVisualPrivate temp_visual;
88 Visual *default_xvisual;
92 visual_template.screen = gdk_screen;
93 visual_list = XGetVisualInfo (gdk_display, VisualScreenMask, &visual_template, &nxvisuals);
94 visuals = g_new (GdkVisualPrivate, nxvisuals);
96 default_xvisual = DefaultVisual (gdk_display, gdk_screen);
99 for (i = 0; i < nxvisuals; i++)
101 if (visual_list[i].depth >= 1)
104 switch (visual_list[i].c_class)
105 #else /* __cplusplus */
106 switch (visual_list[i].class)
107 #endif /* __cplusplus */
110 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
113 visuals[nvisuals].visual.type = GDK_VISUAL_GRAYSCALE;
116 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
119 visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
122 visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
125 visuals[nvisuals].visual.type = GDK_VISUAL_DIRECT_COLOR;
129 visuals[nvisuals].visual.depth = visual_list[i].depth;
130 visuals[nvisuals].visual.byte_order =
131 (ImageByteOrder(gdk_display) == LSBFirst) ?
132 GDK_LSB_FIRST : GDK_MSB_FIRST;
133 visuals[nvisuals].visual.red_mask = visual_list[i].red_mask;
134 visuals[nvisuals].visual.green_mask = visual_list[i].green_mask;
135 visuals[nvisuals].visual.blue_mask = visual_list[i].blue_mask;
136 visuals[nvisuals].visual.colormap_size = visual_list[i].colormap_size;
137 visuals[nvisuals].visual.bits_per_rgb = visual_list[i].bits_per_rgb;
138 visuals[nvisuals].xvisual = visual_list[i].visual;
140 if ((visuals[nvisuals].visual.type == GDK_VISUAL_TRUE_COLOR) ||
141 (visuals[nvisuals].visual.type == GDK_VISUAL_DIRECT_COLOR))
143 gdk_visual_decompose_mask (visuals[nvisuals].visual.red_mask,
144 &visuals[nvisuals].visual.red_shift,
145 &visuals[nvisuals].visual.red_prec);
147 gdk_visual_decompose_mask (visuals[nvisuals].visual.green_mask,
148 &visuals[nvisuals].visual.green_shift,
149 &visuals[nvisuals].visual.green_prec);
151 gdk_visual_decompose_mask (visuals[nvisuals].visual.blue_mask,
152 &visuals[nvisuals].visual.blue_shift,
153 &visuals[nvisuals].visual.blue_prec);
157 visuals[nvisuals].visual.red_mask = 0;
158 visuals[nvisuals].visual.red_shift = 0;
159 visuals[nvisuals].visual.red_prec = 0;
161 visuals[nvisuals].visual.green_mask = 0;
162 visuals[nvisuals].visual.green_shift = 0;
163 visuals[nvisuals].visual.green_prec = 0;
165 visuals[nvisuals].visual.blue_mask = 0;
166 visuals[nvisuals].visual.blue_shift = 0;
167 visuals[nvisuals].visual.blue_prec = 0;
177 for (i = 0; i < nvisuals; i++)
179 for (j = i+1; j < nvisuals; j++)
181 if (visuals[j].visual.depth >= visuals[i].visual.depth)
183 if ((visuals[j].visual.depth == 8) && (visuals[i].visual.depth == 8))
185 if (visuals[j].visual.type == GDK_VISUAL_PSEUDO_COLOR)
187 temp_visual = visuals[j];
188 visuals[j] = visuals[i];
189 visuals[i] = temp_visual;
191 else if ((visuals[i].visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
192 visuals[j].visual.type > visuals[i].visual.type)
194 temp_visual = visuals[j];
195 visuals[j] = visuals[i];
196 visuals[i] = temp_visual;
199 else if ((visuals[j].visual.depth > visuals[i].visual.depth) ||
200 ((visuals[j].visual.depth == visuals[i].visual.depth) &&
201 (visuals[j].visual.type > visuals[i].visual.type)))
203 temp_visual = visuals[j];
204 visuals[j] = visuals[i];
205 visuals[i] = temp_visual;
211 for (i = 0; i < nvisuals; i++)
212 if (default_xvisual->visualid == visuals[i].xvisual->visualid)
214 system_visual = &visuals[i];
218 #ifdef G_ENABLE_DEBUG
219 if (gdk_debug_flags & GDK_DEBUG_MISC)
220 for (i = 0; i < nvisuals; i++)
221 g_message ("visual: %s: %d",
222 visual_names[visuals[i].visual.type],
223 visuals[i].visual.depth);
224 #endif /* G_ENABLE_DEBUG */
226 navailable_depths = 0;
227 for (i = 0; i < npossible_depths; i++)
229 for (j = 0; j < nvisuals; j++)
231 if (visuals[j].visual.depth == possible_depths[i])
233 available_depths[navailable_depths++] = visuals[j].visual.depth;
239 if (navailable_depths == 0)
240 g_error ("unable to find a usable depth");
242 navailable_types = 0;
243 for (i = 0; i < npossible_types; i++)
245 for (j = 0; j < nvisuals; j++)
247 if (visuals[j].visual.type == possible_types[i])
249 available_types[navailable_types++] = visuals[j].visual.type;
255 for (i = 0; i < nvisuals; i++)
256 gdk_visual_add ((GdkVisual*) &visuals[i]);
258 if (npossible_types == 0)
259 g_error ("unable to find a usable visual type");
263 gdk_visual_ref (GdkVisual *visual)
269 gdk_visual_unref (GdkVisual *visual)
275 gdk_visual_get_best_depth (void)
277 return available_depths[0];
281 gdk_visual_get_best_type (void)
283 return available_types[0];
287 gdk_visual_get_system (void)
289 return ((GdkVisual*) system_visual);
293 gdk_visual_get_best (void)
295 return ((GdkVisual*) &(visuals[0]));
299 gdk_visual_get_best_with_depth (gint depth)
301 GdkVisual *return_val;
305 for (i = 0; i < nvisuals; i++)
306 if (depth == visuals[i].visual.depth)
308 return_val = (GdkVisual*) &(visuals[i]);
316 gdk_visual_get_best_with_type (GdkVisualType visual_type)
318 GdkVisual *return_val;
322 for (i = 0; i < nvisuals; i++)
323 if (visual_type == visuals[i].visual.type)
325 return_val = (GdkVisual*) &(visuals[i]);
333 gdk_visual_get_best_with_both (gint depth,
334 GdkVisualType visual_type)
336 GdkVisual *return_val;
340 for (i = 0; i < nvisuals; i++)
341 if ((depth == visuals[i].visual.depth) &&
342 (visual_type == visuals[i].visual.type))
344 return_val = (GdkVisual*) &(visuals[i]);
352 gdk_query_depths (gint **depths,
355 *count = navailable_depths;
356 *depths = available_depths;
360 gdk_query_visual_types (GdkVisualType **visual_types,
363 *count = navailable_types;
364 *visual_types = available_types;
368 gdk_list_visuals (void)
374 for (i = 0; i < nvisuals; ++i)
375 list = g_list_append (list, (gpointer) &visuals[i]);
382 gdk_visual_lookup (Visual *xvisual)
389 visual = g_hash_table_lookup (visual_hash, xvisual);
394 gdkx_visual_get (VisualID xvisualid)
398 for (i = 0; i < nvisuals; i++)
399 if (xvisualid == visuals[i].xvisual->visualid)
400 return (GdkVisual*) &visuals[i];
407 gdk_visual_add (GdkVisual *visual)
409 GdkVisualPrivate *private;
412 visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
413 (GCompareFunc) gdk_visual_compare);
415 private = (GdkVisualPrivate*) visual;
417 g_hash_table_insert (visual_hash, private->xvisual, visual);
421 gdk_visual_decompose_mask (gulong mask,
428 while (!(mask & 0x1))
442 gdk_visual_hash (Visual *key)
444 return key->visualid;
448 gdk_visual_compare (Visual *a,
451 return (a->visualid == b->visualid);