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"
26 static void gdk_visual_add (GdkVisual *visual);
27 static void gdk_visual_decompose_mask (gulong mask,
30 static guint gdk_visual_hash (Visual *key);
31 static gint gdk_visual_compare (Visual *a,
35 static GdkVisualPrivate *system_visual;
36 static GdkVisualPrivate *visuals;
39 static gint available_depths[7];
40 static gint navailable_depths;
42 static GdkVisualType available_types[6];
43 static gint navailable_types;
47 static gchar* visual_names[] =
57 #endif /* G_ENABLE_DEBUG */
59 static GHashTable *visual_hash = NULL;
62 gdk_visual_init (void)
64 static gint possible_depths[7] = { 32, 24, 16, 15, 8, 4, 1 };
65 static GdkVisualType possible_types[6] =
67 GDK_VISUAL_DIRECT_COLOR,
68 GDK_VISUAL_TRUE_COLOR,
69 GDK_VISUAL_PSEUDO_COLOR,
70 GDK_VISUAL_STATIC_COLOR,
72 GDK_VISUAL_STATIC_GRAY
75 static gint npossible_depths = 7;
76 static gint npossible_types = 6;
78 XVisualInfo *visual_list;
79 XVisualInfo visual_template;
80 GdkVisualPrivate temp_visual;
81 Visual *default_xvisual;
85 visual_template.screen = gdk_screen;
86 visual_list = XGetVisualInfo (gdk_display, VisualScreenMask, &visual_template, &nxvisuals);
87 visuals = g_new (GdkVisualPrivate, nxvisuals);
89 default_xvisual = DefaultVisual (gdk_display, gdk_screen);
92 for (i = 0; i < nxvisuals; i++)
94 if (visual_list[i].depth >= 1)
97 switch (visual_list[i].c_class)
98 #else /* __cplusplus */
99 switch (visual_list[i].class)
100 #endif /* __cplusplus */
103 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
106 visuals[nvisuals].visual.type = GDK_VISUAL_GRAYSCALE;
109 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
112 visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
115 visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
118 visuals[nvisuals].visual.type = GDK_VISUAL_DIRECT_COLOR;
122 visuals[nvisuals].visual.depth = visual_list[i].depth;
123 visuals[nvisuals].visual.byte_order =
124 (ImageByteOrder(gdk_display) == LSBFirst) ?
125 GDK_LSB_FIRST : GDK_MSB_FIRST;
126 visuals[nvisuals].visual.red_mask = visual_list[i].red_mask;
127 visuals[nvisuals].visual.green_mask = visual_list[i].green_mask;
128 visuals[nvisuals].visual.blue_mask = visual_list[i].blue_mask;
129 visuals[nvisuals].visual.colormap_size = visual_list[i].colormap_size;
130 visuals[nvisuals].visual.bits_per_rgb = visual_list[i].bits_per_rgb;
131 visuals[nvisuals].xvisual = visual_list[i].visual;
133 if ((visuals[nvisuals].visual.type == GDK_VISUAL_TRUE_COLOR) ||
134 (visuals[nvisuals].visual.type == GDK_VISUAL_DIRECT_COLOR))
136 gdk_visual_decompose_mask (visuals[nvisuals].visual.red_mask,
137 &visuals[nvisuals].visual.red_shift,
138 &visuals[nvisuals].visual.red_prec);
140 gdk_visual_decompose_mask (visuals[nvisuals].visual.green_mask,
141 &visuals[nvisuals].visual.green_shift,
142 &visuals[nvisuals].visual.green_prec);
144 gdk_visual_decompose_mask (visuals[nvisuals].visual.blue_mask,
145 &visuals[nvisuals].visual.blue_shift,
146 &visuals[nvisuals].visual.blue_prec);
150 visuals[nvisuals].visual.red_mask = 0;
151 visuals[nvisuals].visual.red_shift = 0;
152 visuals[nvisuals].visual.red_prec = 0;
154 visuals[nvisuals].visual.green_mask = 0;
155 visuals[nvisuals].visual.green_shift = 0;
156 visuals[nvisuals].visual.green_prec = 0;
158 visuals[nvisuals].visual.blue_mask = 0;
159 visuals[nvisuals].visual.blue_shift = 0;
160 visuals[nvisuals].visual.blue_prec = 0;
170 for (i = 0; i < nvisuals; i++)
172 for (j = i+1; j < nvisuals; j++)
174 if (visuals[j].visual.depth >= visuals[i].visual.depth)
176 if ((visuals[j].visual.depth == 8) && (visuals[i].visual.depth == 8))
178 if (visuals[j].visual.type == GDK_VISUAL_PSEUDO_COLOR)
180 temp_visual = visuals[j];
181 visuals[j] = visuals[i];
182 visuals[i] = temp_visual;
184 else if ((visuals[i].visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
185 visuals[j].visual.type > visuals[i].visual.type)
187 temp_visual = visuals[j];
188 visuals[j] = visuals[i];
189 visuals[i] = temp_visual;
192 else if ((visuals[j].visual.depth > visuals[i].visual.depth) ||
193 ((visuals[j].visual.depth == visuals[i].visual.depth) &&
194 (visuals[j].visual.type > visuals[i].visual.type)))
196 temp_visual = visuals[j];
197 visuals[j] = visuals[i];
198 visuals[i] = temp_visual;
204 for (i = 0; i < nvisuals; i++)
205 if (default_xvisual->visualid == visuals[i].xvisual->visualid)
207 system_visual = &visuals[i];
211 #ifdef G_ENABLE_DEBUG
212 if (gdk_debug_flags & GDK_DEBUG_MISC)
213 for (i = 0; i < nvisuals; i++)
214 g_print ("Gdk: visual: %s: %d\n",
215 visual_names[visuals[i].visual.type],
216 visuals[i].visual.depth);
217 #endif /* G_ENABLE_DEBUG */
219 navailable_depths = 0;
220 for (i = 0; i < npossible_depths; i++)
222 for (j = 0; j < nvisuals; j++)
224 if (visuals[j].visual.depth == possible_depths[i])
226 available_depths[navailable_depths++] = visuals[j].visual.depth;
232 if (navailable_depths == 0)
233 g_error ("unable to find a usable depth");
235 navailable_types = 0;
236 for (i = 0; i < npossible_types; i++)
238 for (j = 0; j < nvisuals; j++)
240 if (visuals[j].visual.type == possible_types[i])
242 available_types[navailable_types++] = visuals[j].visual.type;
248 for (i = 0; i < nvisuals; i++)
249 gdk_visual_add ((GdkVisual*) &visuals[i]);
251 if (npossible_types == 0)
252 g_error ("unable to find a usable visual type");
256 gdk_visual_ref (GdkVisual *visual)
262 gdk_visual_unref (GdkVisual *visual)
268 gdk_visual_get_best_depth (void)
270 return available_depths[0];
274 gdk_visual_get_best_type (void)
276 return available_types[0];
280 gdk_visual_get_system (void)
282 return ((GdkVisual*) system_visual);
286 gdk_visual_get_best (void)
288 return ((GdkVisual*) &(visuals[0]));
292 gdk_visual_get_best_with_depth (gint depth)
294 GdkVisual *return_val;
298 for (i = 0; i < nvisuals; i++)
299 if (depth == visuals[i].visual.depth)
301 return_val = (GdkVisual*) &(visuals[i]);
309 gdk_visual_get_best_with_type (GdkVisualType visual_type)
311 GdkVisual *return_val;
315 for (i = 0; i < nvisuals; i++)
316 if (visual_type == visuals[i].visual.type)
318 return_val = (GdkVisual*) &(visuals[i]);
326 gdk_visual_get_best_with_both (gint depth,
327 GdkVisualType visual_type)
329 GdkVisual *return_val;
333 for (i = 0; i < nvisuals; i++)
334 if ((depth == visuals[i].visual.depth) &&
335 (visual_type == visuals[i].visual.type))
337 return_val = (GdkVisual*) &(visuals[i]);
345 gdk_query_depths (gint **depths,
348 *count = navailable_depths;
349 *depths = available_depths;
353 gdk_query_visual_types (GdkVisualType **visual_types,
356 *count = navailable_types;
357 *visual_types = available_types;
361 gdk_list_visuals (void)
367 for (i = 0; i < nvisuals; ++i)
368 list = g_list_append (list, (gpointer) &visuals[i]);
375 gdk_visual_lookup (Visual *xvisual)
382 visual = g_hash_table_lookup (visual_hash, xvisual);
387 gdkx_visual_get (VisualID xvisualid)
391 for (i = 0; i < nvisuals; i++)
392 if (xvisualid == visuals[i].xvisual->visualid)
393 return (GdkVisual*) &visuals[i];
400 gdk_visual_add (GdkVisual *visual)
402 GdkVisualPrivate *private;
405 visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
406 (GCompareFunc) gdk_visual_compare);
408 private = (GdkVisualPrivate*) visual;
410 g_hash_table_insert (visual_hash, private->xvisual, visual);
414 gdk_visual_decompose_mask (gulong mask,
421 while (!(mask & 0x1))
435 gdk_visual_hash (Visual *key)
437 return key->visualid;
441 gdk_visual_compare (Visual *a,
444 return (a->visualid == b->visualid);