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 Free
16 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #include <X11/Xutil.h>
21 #include "gdkprivate.h"
24 static void gdk_visual_add (GdkVisual *visual);
25 static void gdk_visual_decompose_mask (gulong mask,
28 static guint gdk_visual_hash (Visual *key);
29 static gint gdk_visual_compare (Visual *a,
33 static GdkVisualPrivate *system_visual;
34 static GdkVisualPrivate *visuals;
37 static gint available_depths[4];
38 static gint navailable_depths;
40 static GdkVisualType available_types[6];
41 static gint navailable_types;
43 static char* visual_names[] =
53 static GHashTable *visual_hash = NULL;
58 static gint possible_depths[5] = { 32, 24, 16, 15, 8 };
59 static GdkVisualType possible_types[6] =
61 GDK_VISUAL_DIRECT_COLOR,
62 GDK_VISUAL_TRUE_COLOR,
63 GDK_VISUAL_PSEUDO_COLOR,
64 GDK_VISUAL_STATIC_COLOR,
66 GDK_VISUAL_STATIC_GRAY
69 static gint npossible_depths = 5;
70 static gint npossible_types = 6;
72 XVisualInfo *visual_list;
73 XVisualInfo visual_template;
74 GdkVisualPrivate temp_visual;
75 Visual *default_xvisual;
79 visual_template.screen = gdk_screen;
80 visual_list = XGetVisualInfo (gdk_display, VisualScreenMask, &visual_template, &nxvisuals);
81 visuals = g_new (GdkVisualPrivate, nxvisuals);
83 default_xvisual = DefaultVisual (gdk_display, gdk_screen);
86 for (i = 0; i < nxvisuals; i++)
88 if (visual_list[i].depth >= 8)
91 switch (visual_list[i].c_class)
92 #else /* __cplusplus */
93 switch (visual_list[i].class)
94 #endif /* __cplusplus */
97 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
100 visuals[nvisuals].visual.type = GDK_VISUAL_GRAYSCALE;
103 visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
106 visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
109 visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
112 visuals[nvisuals].visual.type = GDK_VISUAL_DIRECT_COLOR;
116 visuals[nvisuals].visual.depth = visual_list[i].depth;
117 visuals[nvisuals].visual.byte_order =
118 (ImageByteOrder(gdk_display) == LSBFirst) ?
119 GDK_LSB_FIRST : GDK_MSB_FIRST;
120 visuals[nvisuals].visual.red_mask = visual_list[i].red_mask;
121 visuals[nvisuals].visual.green_mask = visual_list[i].green_mask;
122 visuals[nvisuals].visual.blue_mask = visual_list[i].blue_mask;
123 visuals[nvisuals].visual.colormap_size = visual_list[i].colormap_size;
124 visuals[nvisuals].visual.bits_per_rgb = visual_list[i].bits_per_rgb;
125 visuals[nvisuals].xvisual = visual_list[i].visual;
127 if ((visuals[nvisuals].visual.type == GDK_VISUAL_TRUE_COLOR) ||
128 (visuals[nvisuals].visual.type == GDK_VISUAL_DIRECT_COLOR))
130 gdk_visual_decompose_mask (visuals[nvisuals].visual.red_mask,
131 &visuals[nvisuals].visual.red_shift,
132 &visuals[nvisuals].visual.red_prec);
134 gdk_visual_decompose_mask (visuals[nvisuals].visual.green_mask,
135 &visuals[nvisuals].visual.green_shift,
136 &visuals[nvisuals].visual.green_prec);
138 gdk_visual_decompose_mask (visuals[nvisuals].visual.blue_mask,
139 &visuals[nvisuals].visual.blue_shift,
140 &visuals[nvisuals].visual.blue_prec);
144 visuals[nvisuals].visual.red_mask = 0;
145 visuals[nvisuals].visual.red_shift = 0;
146 visuals[nvisuals].visual.red_prec = 0;
148 visuals[nvisuals].visual.green_mask = 0;
149 visuals[nvisuals].visual.green_shift = 0;
150 visuals[nvisuals].visual.green_prec = 0;
152 visuals[nvisuals].visual.blue_mask = 0;
153 visuals[nvisuals].visual.blue_shift = 0;
154 visuals[nvisuals].visual.blue_prec = 0;
163 for (i = 0; i < nvisuals; i++)
165 for (j = i+1; j < nvisuals; j++)
167 if (visuals[j].visual.depth >= visuals[i].visual.depth)
169 if ((visuals[j].visual.depth == 8) && (visuals[i].visual.depth == 8))
171 if (visuals[j].visual.type == GDK_VISUAL_PSEUDO_COLOR)
173 temp_visual = visuals[j];
174 visuals[j] = visuals[i];
175 visuals[i] = temp_visual;
177 else if ((visuals[i].visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
178 visuals[j].visual.type > visuals[i].visual.type)
180 temp_visual = visuals[j];
181 visuals[j] = visuals[i];
182 visuals[i] = temp_visual;
185 else if ((visuals[j].visual.depth > visuals[i].visual.depth) ||
186 ((visuals[j].visual.depth == visuals[i].visual.depth) &&
187 (visuals[j].visual.type > visuals[i].visual.type)))
189 temp_visual = visuals[j];
190 visuals[j] = visuals[i];
191 visuals[i] = temp_visual;
197 for (i = 0; i < nvisuals; i++)
198 if (default_xvisual->visualid == visuals[i].xvisual->visualid)
200 system_visual = &visuals[i];
204 if (gdk_debug_level >= 1)
205 for (i = 0; i < nvisuals; i++)
206 g_print ("visual: %s: %d\n",
207 visual_names[visuals[i].visual.type],
208 visuals[i].visual.depth);
210 navailable_depths = 0;
211 for (i = 0; i < npossible_depths; i++)
213 for (j = 0; j < nvisuals; j++)
215 if (visuals[j].visual.depth == possible_depths[i])
217 available_depths[navailable_depths++] = visuals[j].visual.depth;
223 if (navailable_depths == 0)
224 g_error ("unable to find a usable depth");
226 navailable_types = 0;
227 for (i = 0; i < npossible_types; i++)
229 for (j = 0; j < nvisuals; j++)
231 if (visuals[j].visual.type == possible_types[i])
233 available_types[navailable_types++] = visuals[j].visual.type;
239 for (i = 0; i < nvisuals; i++)
240 gdk_visual_add ((GdkVisual*) &visuals[i]);
242 if (npossible_types == 0)
243 g_error ("unable to find a usable visual type");
247 gdk_visual_ref (GdkVisual *visual)
253 gdk_visual_unref (GdkVisual *visual)
259 gdk_visual_get_best_depth ()
261 return available_depths[0];
265 gdk_visual_get_best_type ()
267 return available_types[0];
271 gdk_visual_get_system ()
273 return ((GdkVisual*) system_visual);
277 gdk_visual_get_best ()
279 return ((GdkVisual*) &(visuals[0]));
283 gdk_visual_get_best_with_depth (gint depth)
285 GdkVisual *return_val;
289 for (i = 0; i < nvisuals; i++)
290 if (depth == visuals[i].visual.depth)
292 return_val = (GdkVisual*) &(visuals[i]);
300 gdk_visual_get_best_with_type (GdkVisualType visual_type)
302 GdkVisual *return_val;
306 for (i = 0; i < nvisuals; i++)
307 if (visual_type == visuals[i].visual.type)
309 return_val = (GdkVisual*) &(visuals[i]);
317 gdk_visual_get_best_with_both (gint depth,
318 GdkVisualType visual_type)
320 GdkVisual *return_val;
324 for (i = 0; i < nvisuals; i++)
325 if ((depth == visuals[i].visual.depth) &&
326 (visual_type == visuals[i].visual.type))
328 return_val = (GdkVisual*) &(visuals[i]);
336 gdk_query_depths (gint **depths,
339 *count = navailable_depths;
340 *depths = available_depths;
344 gdk_query_visual_types (GdkVisualType **visual_types,
347 *count = navailable_types;
348 *visual_types = available_types;
352 gdk_query_visuals (GdkVisual **visual_return,
356 *visual_return = (GdkVisual*) visuals;
361 gdk_visual_lookup (Visual *xvisual)
368 visual = g_hash_table_lookup (visual_hash, xvisual);
373 gdkx_visual_get (VisualID xvisualid)
377 for (i = 0; i < nvisuals; i++)
378 if (xvisualid == visuals[i].xvisual->visualid)
379 return (GdkVisual*) &visuals[i];
386 gdk_visual_add (GdkVisual *visual)
388 GdkVisualPrivate *private;
391 visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
392 (GCompareFunc) gdk_visual_compare);
394 private = (GdkVisualPrivate*) visual;
396 g_hash_table_insert (visual_hash, private->xvisual, visual);
400 gdk_visual_decompose_mask (gulong mask,
407 while (!(mask & 0x1))
421 gdk_visual_hash (Visual *key)
423 return key->visualid;
427 gdk_visual_compare (Visual *a,
430 return (a->visualid == b->visualid);