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.
20 #include <X11/Xutil.h>
22 #include "gdkprivate.h"
25 static void gdk_visual_add (GdkVisual *visual);
26 static void gdk_visual_decompose_mask (gulong mask,
29 static guint gdk_visual_hash (Visual *key);
30 static gint gdk_visual_compare (Visual *a,
34 static GdkVisualPrivate *system_visual;
35 static GdkVisualPrivate *visuals;
38 static gint available_depths[4];
39 static gint navailable_depths;
41 static GdkVisualType available_types[6];
42 static gint navailable_types;
46 static gchar* visual_names[] =
56 #endif /* G_ENABLE_DEBUG */
58 static GHashTable *visual_hash = NULL;
63 static gint possible_depths[6] = { 32, 24, 16, 15, 8, 1 };
64 static GdkVisualType possible_types[6] =
66 GDK_VISUAL_DIRECT_COLOR,
67 GDK_VISUAL_TRUE_COLOR,
68 GDK_VISUAL_PSEUDO_COLOR,
69 GDK_VISUAL_STATIC_COLOR,
71 GDK_VISUAL_STATIC_GRAY
74 static gint npossible_depths = 6;
75 static gint npossible_types = 6;
77 XVisualInfo *visual_list;
78 XVisualInfo visual_template;
79 GdkVisualPrivate temp_visual;
80 Visual *default_xvisual;
84 visual_template.screen = gdk_screen;
85 visual_list = XGetVisualInfo (gdk_display, VisualScreenMask, &visual_template, &nxvisuals);
86 visuals = g_new (GdkVisualPrivate, nxvisuals);
88 default_xvisual = DefaultVisual (gdk_display, gdk_screen);
91 for (i = 0; i < nxvisuals; i++)
93 if (visual_list[i].depth >= 1)
96 switch (visual_list[i].c_class)
97 #else /* __cplusplus */
98 switch (visual_list[i].class)
99 #endif /* __cplusplus */
102 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
105 visuals[nvisuals].visual.type = GDK_VISUAL_GRAYSCALE;
108 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
111 visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
114 visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
117 visuals[nvisuals].visual.type = GDK_VISUAL_DIRECT_COLOR;
121 visuals[nvisuals].visual.depth = visual_list[i].depth;
122 visuals[nvisuals].visual.byte_order =
123 (ImageByteOrder(gdk_display) == LSBFirst) ?
124 GDK_LSB_FIRST : GDK_MSB_FIRST;
125 visuals[nvisuals].visual.red_mask = visual_list[i].red_mask;
126 visuals[nvisuals].visual.green_mask = visual_list[i].green_mask;
127 visuals[nvisuals].visual.blue_mask = visual_list[i].blue_mask;
128 visuals[nvisuals].visual.colormap_size = visual_list[i].colormap_size;
129 visuals[nvisuals].visual.bits_per_rgb = visual_list[i].bits_per_rgb;
130 visuals[nvisuals].xvisual = visual_list[i].visual;
132 if ((visuals[nvisuals].visual.type == GDK_VISUAL_TRUE_COLOR) ||
133 (visuals[nvisuals].visual.type == GDK_VISUAL_DIRECT_COLOR))
135 gdk_visual_decompose_mask (visuals[nvisuals].visual.red_mask,
136 &visuals[nvisuals].visual.red_shift,
137 &visuals[nvisuals].visual.red_prec);
139 gdk_visual_decompose_mask (visuals[nvisuals].visual.green_mask,
140 &visuals[nvisuals].visual.green_shift,
141 &visuals[nvisuals].visual.green_prec);
143 gdk_visual_decompose_mask (visuals[nvisuals].visual.blue_mask,
144 &visuals[nvisuals].visual.blue_shift,
145 &visuals[nvisuals].visual.blue_prec);
149 visuals[nvisuals].visual.red_mask = 0;
150 visuals[nvisuals].visual.red_shift = 0;
151 visuals[nvisuals].visual.red_prec = 0;
153 visuals[nvisuals].visual.green_mask = 0;
154 visuals[nvisuals].visual.green_shift = 0;
155 visuals[nvisuals].visual.green_prec = 0;
157 visuals[nvisuals].visual.blue_mask = 0;
158 visuals[nvisuals].visual.blue_shift = 0;
159 visuals[nvisuals].visual.blue_prec = 0;
168 for (i = 0; i < nvisuals; i++)
170 for (j = i+1; j < nvisuals; j++)
172 if (visuals[j].visual.depth >= visuals[i].visual.depth)
174 if ((visuals[j].visual.depth == 8) && (visuals[i].visual.depth == 8))
176 if (visuals[j].visual.type == GDK_VISUAL_PSEUDO_COLOR)
178 temp_visual = visuals[j];
179 visuals[j] = visuals[i];
180 visuals[i] = temp_visual;
182 else if ((visuals[i].visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
183 visuals[j].visual.type > visuals[i].visual.type)
185 temp_visual = visuals[j];
186 visuals[j] = visuals[i];
187 visuals[i] = temp_visual;
190 else if ((visuals[j].visual.depth > visuals[i].visual.depth) ||
191 ((visuals[j].visual.depth == visuals[i].visual.depth) &&
192 (visuals[j].visual.type > visuals[i].visual.type)))
194 temp_visual = visuals[j];
195 visuals[j] = visuals[i];
196 visuals[i] = temp_visual;
202 for (i = 0; i < nvisuals; i++)
203 if (default_xvisual->visualid == visuals[i].xvisual->visualid)
205 system_visual = &visuals[i];
209 #ifdef G_ENABLE_DEBUG
210 if (gdk_debug_flags & GDK_DEBUG_MISC)
211 for (i = 0; i < nvisuals; i++)
212 g_print ("Gdk: visual: %s: %d\n",
213 visual_names[visuals[i].visual.type],
214 visuals[i].visual.depth);
215 #endif /* G_ENABLE_DEBUG */
217 navailable_depths = 0;
218 for (i = 0; i < npossible_depths; i++)
220 for (j = 0; j < nvisuals; j++)
222 if (visuals[j].visual.depth == possible_depths[i])
224 available_depths[navailable_depths++] = visuals[j].visual.depth;
230 if (navailable_depths == 0)
231 g_error ("unable to find a usable depth");
233 navailable_types = 0;
234 for (i = 0; i < npossible_types; i++)
236 for (j = 0; j < nvisuals; j++)
238 if (visuals[j].visual.type == possible_types[i])
240 available_types[navailable_types++] = visuals[j].visual.type;
246 for (i = 0; i < nvisuals; i++)
247 gdk_visual_add ((GdkVisual*) &visuals[i]);
249 if (npossible_types == 0)
250 g_error ("unable to find a usable visual type");
254 gdk_visual_ref (GdkVisual *visual)
260 gdk_visual_unref (GdkVisual *visual)
266 gdk_visual_get_best_depth ()
268 return available_depths[0];
272 gdk_visual_get_best_type ()
274 return available_types[0];
278 gdk_visual_get_system ()
280 return ((GdkVisual*) system_visual);
284 gdk_visual_get_best ()
286 return ((GdkVisual*) &(visuals[0]));
290 gdk_visual_get_best_with_depth (gint depth)
292 GdkVisual *return_val;
296 for (i = 0; i < nvisuals; i++)
297 if (depth == visuals[i].visual.depth)
299 return_val = (GdkVisual*) &(visuals[i]);
307 gdk_visual_get_best_with_type (GdkVisualType visual_type)
309 GdkVisual *return_val;
313 for (i = 0; i < nvisuals; i++)
314 if (visual_type == visuals[i].visual.type)
316 return_val = (GdkVisual*) &(visuals[i]);
324 gdk_visual_get_best_with_both (gint depth,
325 GdkVisualType visual_type)
327 GdkVisual *return_val;
331 for (i = 0; i < nvisuals; i++)
332 if ((depth == visuals[i].visual.depth) &&
333 (visual_type == visuals[i].visual.type))
335 return_val = (GdkVisual*) &(visuals[i]);
343 gdk_query_depths (gint **depths,
346 *count = navailable_depths;
347 *depths = available_depths;
351 gdk_query_visual_types (GdkVisualType **visual_types,
354 *count = navailable_types;
355 *visual_types = available_types;
359 gdk_list_visuals (void)
365 for (i = 0; i < nvisuals; ++i)
366 list = g_list_append (list, (gpointer) &visuals[i]);
373 gdk_visual_lookup (Visual *xvisual)
380 visual = g_hash_table_lookup (visual_hash, xvisual);
385 gdkx_visual_get (VisualID xvisualid)
389 for (i = 0; i < nvisuals; i++)
390 if (xvisualid == visuals[i].xvisual->visualid)
391 return (GdkVisual*) &visuals[i];
398 gdk_visual_add (GdkVisual *visual)
400 GdkVisualPrivate *private;
403 visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
404 (GCompareFunc) gdk_visual_compare);
406 private = (GdkVisualPrivate*) visual;
408 g_hash_table_insert (visual_hash, private->xvisual, visual);
412 gdk_visual_decompose_mask (gulong mask,
419 while (!(mask & 0x1))
433 gdk_visual_hash (Visual *key)
435 return key->visualid;
439 gdk_visual_compare (Visual *a,
442 return (a->visualid == b->visualid);