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434 lines
9.8 KiB
C
434 lines
9.8 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "gdk.h"
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#include "gdkprivate.h"
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static void gdk_visual_add (GdkVisual *visual);
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static void gdk_visual_decompose_mask (gulong mask,
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gint *shift,
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gint *prec);
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static guint gdk_visual_hash (Visual *key);
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static gint gdk_visual_compare (Visual *a,
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Visual *b);
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static GdkVisualPrivate *system_visual;
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static GdkVisualPrivate *visuals;
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static gint nvisuals;
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static gint available_depths[4];
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static gint navailable_depths;
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static GdkVisualType available_types[6];
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static gint navailable_types;
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static char* visual_names[] =
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{
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"static gray",
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"grayscale",
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"static color",
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"pseudo color",
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"true color",
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"direct color",
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};
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static GHashTable *visual_hash = NULL;
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void
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gdk_visual_init ()
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{
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static gint possible_depths[6] = { 32, 24, 16, 15, 8, 1 };
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static GdkVisualType possible_types[6] =
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{
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GDK_VISUAL_DIRECT_COLOR,
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GDK_VISUAL_TRUE_COLOR,
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GDK_VISUAL_PSEUDO_COLOR,
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GDK_VISUAL_STATIC_COLOR,
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GDK_VISUAL_GRAYSCALE,
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GDK_VISUAL_STATIC_GRAY
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};
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static gint npossible_depths = 6;
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static gint npossible_types = 6;
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XVisualInfo *visual_list;
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XVisualInfo visual_template;
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GdkVisualPrivate temp_visual;
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Visual *default_xvisual;
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int nxvisuals;
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int i, j;
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visual_template.screen = gdk_screen;
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visual_list = XGetVisualInfo (gdk_display, VisualScreenMask, &visual_template, &nxvisuals);
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visuals = g_new (GdkVisualPrivate, nxvisuals);
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default_xvisual = DefaultVisual (gdk_display, gdk_screen);
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nvisuals = 0;
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for (i = 0; i < nxvisuals; i++)
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{
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if (visual_list[i].depth >= 1)
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{
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#ifdef __cplusplus
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switch (visual_list[i].c_class)
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#else /* __cplusplus */
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switch (visual_list[i].class)
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#endif /* __cplusplus */
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{
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case StaticGray:
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visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
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break;
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case GrayScale:
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visuals[nvisuals].visual.type = GDK_VISUAL_GRAYSCALE;
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break;
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case StaticColor:
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visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
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break;
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case PseudoColor:
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visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
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break;
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case TrueColor:
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visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
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break;
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case DirectColor:
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visuals[nvisuals].visual.type = GDK_VISUAL_DIRECT_COLOR;
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break;
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}
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visuals[nvisuals].visual.depth = visual_list[i].depth;
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visuals[nvisuals].visual.byte_order =
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(ImageByteOrder(gdk_display) == LSBFirst) ?
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GDK_LSB_FIRST : GDK_MSB_FIRST;
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visuals[nvisuals].visual.red_mask = visual_list[i].red_mask;
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visuals[nvisuals].visual.green_mask = visual_list[i].green_mask;
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visuals[nvisuals].visual.blue_mask = visual_list[i].blue_mask;
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visuals[nvisuals].visual.colormap_size = visual_list[i].colormap_size;
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visuals[nvisuals].visual.bits_per_rgb = visual_list[i].bits_per_rgb;
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visuals[nvisuals].xvisual = visual_list[i].visual;
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if ((visuals[nvisuals].visual.type == GDK_VISUAL_TRUE_COLOR) ||
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(visuals[nvisuals].visual.type == GDK_VISUAL_DIRECT_COLOR))
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{
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gdk_visual_decompose_mask (visuals[nvisuals].visual.red_mask,
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&visuals[nvisuals].visual.red_shift,
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&visuals[nvisuals].visual.red_prec);
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gdk_visual_decompose_mask (visuals[nvisuals].visual.green_mask,
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&visuals[nvisuals].visual.green_shift,
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&visuals[nvisuals].visual.green_prec);
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gdk_visual_decompose_mask (visuals[nvisuals].visual.blue_mask,
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&visuals[nvisuals].visual.blue_shift,
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&visuals[nvisuals].visual.blue_prec);
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}
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else
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{
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visuals[nvisuals].visual.red_mask = 0;
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visuals[nvisuals].visual.red_shift = 0;
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visuals[nvisuals].visual.red_prec = 0;
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visuals[nvisuals].visual.green_mask = 0;
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visuals[nvisuals].visual.green_shift = 0;
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visuals[nvisuals].visual.green_prec = 0;
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visuals[nvisuals].visual.blue_mask = 0;
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visuals[nvisuals].visual.blue_shift = 0;
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visuals[nvisuals].visual.blue_prec = 0;
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}
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nvisuals += 1;
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}
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}
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XFree (visual_list);
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for (i = 0; i < nvisuals; i++)
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{
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for (j = i+1; j < nvisuals; j++)
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{
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if (visuals[j].visual.depth >= visuals[i].visual.depth)
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{
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if ((visuals[j].visual.depth == 8) && (visuals[i].visual.depth == 8))
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{
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if (visuals[j].visual.type == GDK_VISUAL_PSEUDO_COLOR)
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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else if ((visuals[i].visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
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visuals[j].visual.type > visuals[i].visual.type)
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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}
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else if ((visuals[j].visual.depth > visuals[i].visual.depth) ||
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((visuals[j].visual.depth == visuals[i].visual.depth) &&
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(visuals[j].visual.type > visuals[i].visual.type)))
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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}
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}
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}
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for (i = 0; i < nvisuals; i++)
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if (default_xvisual->visualid == visuals[i].xvisual->visualid)
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{
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system_visual = &visuals[i];
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break;
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}
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#ifdef G_ENABLE_DEBUG
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if (gdk_debug_flags & GDK_DEBUG_MISC)
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for (i = 0; i < nvisuals; i++)
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g_print ("visual: %s: %d\n",
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visual_names[visuals[i].visual.type],
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visuals[i].visual.depth);
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#endif /* G_ENABLE_DEBUG */
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navailable_depths = 0;
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for (i = 0; i < npossible_depths; i++)
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{
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for (j = 0; j < nvisuals; j++)
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{
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if (visuals[j].visual.depth == possible_depths[i])
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{
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available_depths[navailable_depths++] = visuals[j].visual.depth;
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break;
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}
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}
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}
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if (navailable_depths == 0)
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g_error ("unable to find a usable depth");
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navailable_types = 0;
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for (i = 0; i < npossible_types; i++)
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{
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for (j = 0; j < nvisuals; j++)
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{
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if (visuals[j].visual.type == possible_types[i])
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{
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available_types[navailable_types++] = visuals[j].visual.type;
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break;
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}
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}
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}
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for (i = 0; i < nvisuals; i++)
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gdk_visual_add ((GdkVisual*) &visuals[i]);
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if (npossible_types == 0)
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g_error ("unable to find a usable visual type");
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}
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GdkVisual*
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gdk_visual_ref (GdkVisual *visual)
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{
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return visual;
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}
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void
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gdk_visual_unref (GdkVisual *visual)
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{
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return;
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}
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gint
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gdk_visual_get_best_depth ()
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{
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return available_depths[0];
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}
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GdkVisualType
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gdk_visual_get_best_type ()
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{
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return available_types[0];
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}
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GdkVisual*
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gdk_visual_get_system ()
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{
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return ((GdkVisual*) system_visual);
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}
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GdkVisual*
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gdk_visual_get_best ()
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{
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return ((GdkVisual*) &(visuals[0]));
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}
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GdkVisual*
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gdk_visual_get_best_with_depth (gint depth)
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{
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < nvisuals; i++)
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if (depth == visuals[i].visual.depth)
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{
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return_val = (GdkVisual*) &(visuals[i]);
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break;
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}
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return return_val;
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}
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GdkVisual*
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gdk_visual_get_best_with_type (GdkVisualType visual_type)
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{
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < nvisuals; i++)
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if (visual_type == visuals[i].visual.type)
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{
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return_val = (GdkVisual*) &(visuals[i]);
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break;
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}
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return return_val;
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}
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GdkVisual*
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gdk_visual_get_best_with_both (gint depth,
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GdkVisualType visual_type)
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{
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < nvisuals; i++)
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if ((depth == visuals[i].visual.depth) &&
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(visual_type == visuals[i].visual.type))
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{
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return_val = (GdkVisual*) &(visuals[i]);
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break;
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}
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return return_val;
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}
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void
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gdk_query_depths (gint **depths,
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gint *count)
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{
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*count = navailable_depths;
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*depths = available_depths;
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}
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void
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gdk_query_visual_types (GdkVisualType **visual_types,
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gint *count)
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{
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*count = navailable_types;
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*visual_types = available_types;
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}
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void
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gdk_query_visuals (GdkVisual **visual_return,
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gint *count)
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{
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*count = nvisuals;
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*visual_return = (GdkVisual*) visuals;
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}
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GdkVisual*
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gdk_visual_lookup (Visual *xvisual)
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{
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GdkVisual *visual;
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if (!visual_hash)
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return NULL;
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visual = g_hash_table_lookup (visual_hash, xvisual);
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return visual;
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}
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GdkVisual*
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gdkx_visual_get (VisualID xvisualid)
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{
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int i;
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for (i = 0; i < nvisuals; i++)
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if (xvisualid == visuals[i].xvisual->visualid)
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return (GdkVisual*) &visuals[i];
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return NULL;
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}
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static void
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gdk_visual_add (GdkVisual *visual)
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{
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GdkVisualPrivate *private;
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if (!visual_hash)
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visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
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(GCompareFunc) gdk_visual_compare);
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private = (GdkVisualPrivate*) visual;
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g_hash_table_insert (visual_hash, private->xvisual, visual);
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}
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static void
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gdk_visual_decompose_mask (gulong mask,
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gint *shift,
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gint *prec)
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{
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*shift = 0;
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*prec = 0;
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while (!(mask & 0x1))
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{
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(*shift)++;
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mask >>= 1;
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}
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while (mask & 0x1)
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{
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(*prec)++;
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mask >>= 1;
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}
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}
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static guint
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gdk_visual_hash (Visual *key)
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{
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return key->visualid;
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}
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static gint
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gdk_visual_compare (Visual *a,
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Visual *b)
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{
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return (a->visualid == b->visualid);
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}
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