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 "gdkprivate.h"
34 static void gdk_visual_add (GdkVisual *visual);
35 static void gdk_visual_decompose_mask (gulong mask,
38 static guint gdk_visual_hash (Visual *key);
39 static gint gdk_visual_compare (Visual *a,
43 static GdkVisualPrivate *system_visual;
44 static GdkVisualPrivate *visuals;
47 static gint available_depths[7];
48 static gint navailable_depths;
50 static GdkVisualType available_types[6];
51 static gint navailable_types;
55 static const gchar* visual_names[] =
65 #endif /* G_ENABLE_DEBUG */
67 static GHashTable *visual_hash = NULL;
70 gdk_visual_init (void)
72 static const gint possible_depths[7] = { 32, 24, 16, 15, 8, 4, 1 };
73 static const GdkVisualType possible_types[6] =
75 GDK_VISUAL_DIRECT_COLOR,
76 GDK_VISUAL_TRUE_COLOR,
77 GDK_VISUAL_PSEUDO_COLOR,
78 GDK_VISUAL_STATIC_COLOR,
80 GDK_VISUAL_STATIC_GRAY
83 static const gint npossible_depths = sizeof(possible_depths)/sizeof(gint);
84 static const gint npossible_types = sizeof(possible_types)/sizeof(GdkVisualType);
86 XVisualInfo *visual_list;
87 XVisualInfo visual_template;
88 GdkVisualPrivate temp_visual;
89 Visual *default_xvisual;
93 visual_template.screen = gdk_screen;
94 visual_list = XGetVisualInfo (gdk_display, VisualScreenMask, &visual_template, &nxvisuals);
95 visuals = g_new (GdkVisualPrivate, nxvisuals);
97 default_xvisual = DefaultVisual (gdk_display, gdk_screen);
100 for (i = 0; i < nxvisuals; i++)
102 if (visual_list[i].depth >= 1)
105 switch (visual_list[i].c_class)
106 #else /* __cplusplus */
107 switch (visual_list[i].class)
108 #endif /* __cplusplus */
111 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
114 visuals[nvisuals].visual.type = GDK_VISUAL_GRAYSCALE;
117 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
120 visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
123 visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
126 visuals[nvisuals].visual.type = GDK_VISUAL_DIRECT_COLOR;
130 visuals[nvisuals].visual.depth = visual_list[i].depth;
131 visuals[nvisuals].visual.byte_order =
132 (ImageByteOrder(gdk_display) == LSBFirst) ?
133 GDK_LSB_FIRST : GDK_MSB_FIRST;
134 visuals[nvisuals].visual.red_mask = visual_list[i].red_mask;
135 visuals[nvisuals].visual.green_mask = visual_list[i].green_mask;
136 visuals[nvisuals].visual.blue_mask = visual_list[i].blue_mask;
137 visuals[nvisuals].visual.colormap_size = visual_list[i].colormap_size;
138 visuals[nvisuals].visual.bits_per_rgb = visual_list[i].bits_per_rgb;
139 visuals[nvisuals].xvisual = visual_list[i].visual;
141 if ((visuals[nvisuals].visual.type == GDK_VISUAL_TRUE_COLOR) ||
142 (visuals[nvisuals].visual.type == GDK_VISUAL_DIRECT_COLOR))
144 gdk_visual_decompose_mask (visuals[nvisuals].visual.red_mask,
145 &visuals[nvisuals].visual.red_shift,
146 &visuals[nvisuals].visual.red_prec);
148 gdk_visual_decompose_mask (visuals[nvisuals].visual.green_mask,
149 &visuals[nvisuals].visual.green_shift,
150 &visuals[nvisuals].visual.green_prec);
152 gdk_visual_decompose_mask (visuals[nvisuals].visual.blue_mask,
153 &visuals[nvisuals].visual.blue_shift,
154 &visuals[nvisuals].visual.blue_prec);
158 visuals[nvisuals].visual.red_mask = 0;
159 visuals[nvisuals].visual.red_shift = 0;
160 visuals[nvisuals].visual.red_prec = 0;
162 visuals[nvisuals].visual.green_mask = 0;
163 visuals[nvisuals].visual.green_shift = 0;
164 visuals[nvisuals].visual.green_prec = 0;
166 visuals[nvisuals].visual.blue_mask = 0;
167 visuals[nvisuals].visual.blue_shift = 0;
168 visuals[nvisuals].visual.blue_prec = 0;
178 for (i = 0; i < nvisuals; i++)
180 for (j = i+1; j < nvisuals; j++)
182 if (visuals[j].visual.depth >= visuals[i].visual.depth)
184 if ((visuals[j].visual.depth == 8) && (visuals[i].visual.depth == 8))
186 if (visuals[j].visual.type == GDK_VISUAL_PSEUDO_COLOR)
188 temp_visual = visuals[j];
189 visuals[j] = visuals[i];
190 visuals[i] = temp_visual;
192 else if ((visuals[i].visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
193 visuals[j].visual.type > visuals[i].visual.type)
195 temp_visual = visuals[j];
196 visuals[j] = visuals[i];
197 visuals[i] = temp_visual;
200 else if ((visuals[j].visual.depth > visuals[i].visual.depth) ||
201 ((visuals[j].visual.depth == visuals[i].visual.depth) &&
202 (visuals[j].visual.type > visuals[i].visual.type)))
204 temp_visual = visuals[j];
205 visuals[j] = visuals[i];
206 visuals[i] = temp_visual;
212 for (i = 0; i < nvisuals; i++)
213 if (default_xvisual->visualid == visuals[i].xvisual->visualid)
215 system_visual = &visuals[i];
219 #ifdef G_ENABLE_DEBUG
220 if (gdk_debug_flags & GDK_DEBUG_MISC)
221 for (i = 0; i < nvisuals; i++)
222 g_message ("visual: %s: %d",
223 visual_names[visuals[i].visual.type],
224 visuals[i].visual.depth);
225 #endif /* G_ENABLE_DEBUG */
227 navailable_depths = 0;
228 for (i = 0; i < npossible_depths; i++)
230 for (j = 0; j < nvisuals; j++)
232 if (visuals[j].visual.depth == possible_depths[i])
234 available_depths[navailable_depths++] = visuals[j].visual.depth;
240 if (navailable_depths == 0)
241 g_error ("unable to find a usable depth");
243 navailable_types = 0;
244 for (i = 0; i < npossible_types; i++)
246 for (j = 0; j < nvisuals; j++)
248 if (visuals[j].visual.type == possible_types[i])
250 available_types[navailable_types++] = visuals[j].visual.type;
256 for (i = 0; i < nvisuals; i++)
257 gdk_visual_add ((GdkVisual*) &visuals[i]);
259 if (npossible_types == 0)
260 g_error ("unable to find a usable visual type");
264 gdk_visual_ref (GdkVisual *visual)
270 gdk_visual_unref (GdkVisual *visual)
276 gdk_visual_get_best_depth (void)
278 return available_depths[0];
282 gdk_visual_get_best_type (void)
284 return available_types[0];
288 gdk_visual_get_system (void)
290 return ((GdkVisual*) system_visual);
294 gdk_visual_get_best (void)
296 return ((GdkVisual*) &(visuals[0]));
300 gdk_visual_get_best_with_depth (gint depth)
302 GdkVisual *return_val;
306 for (i = 0; i < nvisuals; i++)
307 if (depth == visuals[i].visual.depth)
309 return_val = (GdkVisual*) &(visuals[i]);
317 gdk_visual_get_best_with_type (GdkVisualType visual_type)
319 GdkVisual *return_val;
323 for (i = 0; i < nvisuals; i++)
324 if (visual_type == visuals[i].visual.type)
326 return_val = (GdkVisual*) &(visuals[i]);
334 gdk_visual_get_best_with_both (gint depth,
335 GdkVisualType visual_type)
337 GdkVisual *return_val;
341 for (i = 0; i < nvisuals; i++)
342 if ((depth == visuals[i].visual.depth) &&
343 (visual_type == visuals[i].visual.type))
345 return_val = (GdkVisual*) &(visuals[i]);
353 gdk_query_depths (gint **depths,
356 *count = navailable_depths;
357 *depths = available_depths;
361 gdk_query_visual_types (GdkVisualType **visual_types,
364 *count = navailable_types;
365 *visual_types = available_types;
369 gdk_list_visuals (void)
375 for (i = 0; i < nvisuals; ++i)
376 list = g_list_append (list, (gpointer) &visuals[i]);
383 gdk_visual_lookup (Visual *xvisual)
390 visual = g_hash_table_lookup (visual_hash, xvisual);
395 gdkx_visual_get (VisualID xvisualid)
399 for (i = 0; i < nvisuals; i++)
400 if (xvisualid == visuals[i].xvisual->visualid)
401 return (GdkVisual*) &visuals[i];
408 gdk_visual_add (GdkVisual *visual)
410 GdkVisualPrivate *private;
413 visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
414 (GCompareFunc) gdk_visual_compare);
416 private = (GdkVisualPrivate*) visual;
418 g_hash_table_insert (visual_hash, private->xvisual, visual);
422 gdk_visual_decompose_mask (gulong mask,
429 while (!(mask & 0x1))
443 gdk_visual_hash (Visual *key)
445 return key->visualid;
449 gdk_visual_compare (Visual *a,
452 return (a->visualid == b->visualid);