mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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dae447728d
We want to create windows with the default visuals such that we then have the right visual for GLX when we want to create the paint GL context for the window. For instance, (in bug 738670) the default rgba visual we picked for the NVidia driver had an alpha size of 0 which gave us a BadMatch when later trying to initialize a gl context on it with a alpha FBConfig. Instead of just picking what the Xserver likes for the default, and just picking the first rgba visual we now actually call into GLX to pick an appropriate visual.
601 lines
15 KiB
C
601 lines
15 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 Lesser 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gdkvisualprivate.h"
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#include "gdkprivate-x11.h"
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#include "gdkscreen-x11.h"
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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struct _GdkX11Visual
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{
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GdkVisual visual;
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Visual *xvisual;
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Colormap colormap;
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};
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struct _GdkX11VisualClass
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{
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GdkVisualClass visual_class;
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};
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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 gboolean gdk_visual_equal (Visual *a,
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Visual *b);
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#ifdef G_ENABLE_DEBUG
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static const gchar *const 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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#endif /* G_ENABLE_DEBUG */
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G_DEFINE_TYPE (GdkX11Visual, gdk_x11_visual, GDK_TYPE_VISUAL)
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static void
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gdk_x11_visual_init (GdkX11Visual *x11_visual)
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{
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x11_visual->colormap = None;
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}
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static void
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gdk_x11_visual_finalize (GObject *object)
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{
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GdkVisual *visual = (GdkVisual *)object;
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GdkX11Visual *x11_visual = (GdkX11Visual *)object;
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if (x11_visual->colormap != None)
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XFreeColormap (GDK_SCREEN_XDISPLAY (visual->screen), x11_visual->colormap);
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G_OBJECT_CLASS (gdk_x11_visual_parent_class)->finalize (object);
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}
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static void
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gdk_x11_visual_dispose (GObject *object)
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{
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GdkVisual *visual = (GdkVisual *)object;
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GdkX11Visual *x11_visual = (GdkX11Visual *)object;
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if (x11_visual->colormap != None)
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{
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XFreeColormap (GDK_SCREEN_XDISPLAY (visual->screen), x11_visual->colormap);
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x11_visual->colormap = None;
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}
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G_OBJECT_CLASS (gdk_x11_visual_parent_class)->dispose (object);
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}
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static void
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gdk_x11_visual_class_init (GdkX11VisualClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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object_class->finalize = gdk_x11_visual_finalize;
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object_class->dispose = gdk_x11_visual_dispose;
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}
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void
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_gdk_x11_screen_init_visuals (GdkScreen *screen)
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{
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static const gint possible_depths[8] = { 32, 30, 24, 16, 15, 8, 4, 1 };
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static const 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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GdkX11Screen *x11_screen;
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XVisualInfo *visual_list;
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XVisualInfo visual_template;
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GdkVisual *temp_visual;
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Visual *default_xvisual;
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GdkVisual **visuals;
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int nxvisuals;
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int nvisuals;
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int i, j;
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g_return_if_fail (GDK_IS_SCREEN (screen));
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x11_screen = GDK_X11_SCREEN (screen);
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nxvisuals = 0;
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visual_template.screen = x11_screen->screen_num;
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visual_list = XGetVisualInfo (x11_screen->xdisplay, VisualScreenMask, &visual_template, &nxvisuals);
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visuals = g_new (GdkVisual *, nxvisuals);
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for (i = 0; i < nxvisuals; i++)
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visuals[i] = g_object_new (GDK_TYPE_X11_VISUAL, NULL);
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default_xvisual = DefaultVisual (x11_screen->xdisplay, x11_screen->screen_num);
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nvisuals = 0;
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for (i = 0; i < nxvisuals; i++)
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{
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visuals[nvisuals]->screen = screen;
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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]->type = GDK_VISUAL_STATIC_GRAY;
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break;
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case GrayScale:
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visuals[nvisuals]->type = GDK_VISUAL_GRAYSCALE;
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break;
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case StaticColor:
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visuals[nvisuals]->type = GDK_VISUAL_STATIC_COLOR;
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break;
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case PseudoColor:
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visuals[nvisuals]->type = GDK_VISUAL_PSEUDO_COLOR;
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break;
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case TrueColor:
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visuals[nvisuals]->type = GDK_VISUAL_TRUE_COLOR;
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break;
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case DirectColor:
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visuals[nvisuals]->type = GDK_VISUAL_DIRECT_COLOR;
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break;
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}
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visuals[nvisuals]->depth = visual_list[i].depth;
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visuals[nvisuals]->byte_order =
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(ImageByteOrder(x11_screen->xdisplay) == LSBFirst) ?
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GDK_LSB_FIRST : GDK_MSB_FIRST;
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visuals[nvisuals]->red_mask = visual_list[i].red_mask;
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visuals[nvisuals]->green_mask = visual_list[i].green_mask;
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visuals[nvisuals]->blue_mask = visual_list[i].blue_mask;
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visuals[nvisuals]->colormap_size = visual_list[i].colormap_size;
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visuals[nvisuals]->bits_per_rgb = visual_list[i].bits_per_rgb;
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GDK_X11_VISUAL (visuals[nvisuals])->xvisual = visual_list[i].visual;
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if ((visuals[nvisuals]->type == GDK_VISUAL_TRUE_COLOR) ||
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(visuals[nvisuals]->type == GDK_VISUAL_DIRECT_COLOR))
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{
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gdk_visual_decompose_mask (visuals[nvisuals]->red_mask,
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&visuals[nvisuals]->red_shift,
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&visuals[nvisuals]->red_prec);
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gdk_visual_decompose_mask (visuals[nvisuals]->green_mask,
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&visuals[nvisuals]->green_shift,
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&visuals[nvisuals]->green_prec);
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gdk_visual_decompose_mask (visuals[nvisuals]->blue_mask,
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&visuals[nvisuals]->blue_shift,
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&visuals[nvisuals]->blue_prec);
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}
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else
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{
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visuals[nvisuals]->red_mask = 0;
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visuals[nvisuals]->red_shift = 0;
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visuals[nvisuals]->red_prec = 0;
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visuals[nvisuals]->green_mask = 0;
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visuals[nvisuals]->green_shift = 0;
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visuals[nvisuals]->green_prec = 0;
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visuals[nvisuals]->blue_mask = 0;
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visuals[nvisuals]->blue_shift = 0;
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visuals[nvisuals]->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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if (visual_list)
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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]->depth >= visuals[i]->depth)
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{
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if ((visuals[j]->depth == 8) && (visuals[i]->depth == 8))
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{
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if (visuals[j]->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]->type != GDK_VISUAL_PSEUDO_COLOR) &&
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visuals[j]->type > visuals[i]->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]->depth > visuals[i]->depth) ||
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((visuals[j]->depth == visuals[i]->depth) &&
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(visuals[j]->type > visuals[i]->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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{
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if (default_xvisual->visualid == GDK_X11_VISUAL (visuals[i])->xvisual->visualid)
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{
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x11_screen->system_visual = visuals[i];
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GDK_X11_VISUAL (visuals[i])->colormap =
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DefaultColormap (x11_screen->xdisplay, x11_screen->screen_num);
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}
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/* For now, we only support 8888 ARGB for the "rgba visual".
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* Additional formats (like ABGR) could be added later if they
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* turn up.
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*/
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if (x11_screen->rgba_visual == NULL &&
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visuals[i]->depth == 32 &&
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(visuals[i]->red_mask == 0xff0000 &&
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visuals[i]->green_mask == 0x00ff00 &&
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visuals[i]->blue_mask == 0x0000ff))
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{
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x11_screen->rgba_visual = visuals[i];
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}
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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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{
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static const gchar *const 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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for (i = 0; i < nvisuals; i++)
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g_message ("visual: %s: %d", visual_names[visuals[i]->type], visuals[i]->depth);
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}
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#endif /* G_ENABLE_DEBUG */
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x11_screen->navailable_depths = 0;
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for (i = 0; i < G_N_ELEMENTS (possible_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]->depth == possible_depths[i])
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{
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x11_screen->available_depths[x11_screen->navailable_depths++] = visuals[j]->depth;
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break;
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}
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}
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}
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if (x11_screen->navailable_depths == 0)
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g_error ("unable to find a usable depth");
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x11_screen->navailable_types = 0;
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for (i = 0; i < G_N_ELEMENTS (possible_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]->type == possible_types[i])
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{
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x11_screen->available_types[x11_screen->navailable_types++] = visuals[j]->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 (visuals[i]);
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if (x11_screen->navailable_types == 0)
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g_error ("unable to find a usable visual type");
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x11_screen->visuals = visuals;
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x11_screen->nvisuals = nvisuals;
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/* If GL is available we want to pick better default/rgba visuals,
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as we care about glx details such as alpha/depth/stencil depth,
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stereo and double buffering */
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_gdk_x11_screen_update_visuals_for_gl (screen);
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}
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gint
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_gdk_x11_screen_visual_get_best_depth (GdkScreen *screen)
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{
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return GDK_X11_SCREEN (screen)->available_depths[0];
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}
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GdkVisualType
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_gdk_x11_screen_visual_get_best_type (GdkScreen *screen)
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{
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return GDK_X11_SCREEN (screen)->available_types[0];
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}
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GdkVisual *
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_gdk_x11_screen_get_system_visual (GdkScreen *screen)
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{
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g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
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return ((GdkVisual *) GDK_X11_SCREEN (screen)->system_visual);
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}
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GdkVisual*
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_gdk_x11_screen_visual_get_best (GdkScreen *screen)
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{
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GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
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return x11_screen->visuals[0];
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}
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GdkVisual*
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_gdk_x11_screen_visual_get_best_with_depth (GdkScreen *screen,
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gint depth)
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{
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GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
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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 < x11_screen->nvisuals; i++)
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if (depth == x11_screen->visuals[i]->depth)
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{
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return_val = x11_screen->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_x11_screen_visual_get_best_with_type (GdkScreen *screen,
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GdkVisualType visual_type)
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{
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GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
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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 < x11_screen->nvisuals; i++)
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if (visual_type == x11_screen->visuals[i]->type)
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{
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return_val = x11_screen->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_x11_screen_visual_get_best_with_both (GdkScreen *screen,
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gint depth,
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GdkVisualType visual_type)
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{
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GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
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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 < x11_screen->nvisuals; i++)
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if ((depth == x11_screen->visuals[i]->depth) &&
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(visual_type == x11_screen->visuals[i]->type))
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{
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return_val = x11_screen->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_x11_screen_query_depths (GdkScreen *screen,
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gint **depths,
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gint *count)
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{
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GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
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*count = x11_screen->navailable_depths;
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*depths = x11_screen->available_depths;
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}
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void
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_gdk_x11_screen_query_visual_types (GdkScreen *screen,
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GdkVisualType **visual_types,
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gint *count)
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{
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GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
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*count = x11_screen->navailable_types;
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*visual_types = x11_screen->available_types;
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}
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GList *
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_gdk_x11_screen_list_visuals (GdkScreen *screen)
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{
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GList *list;
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GdkX11Screen *x11_screen;
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guint i;
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g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
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x11_screen = GDK_X11_SCREEN (screen);
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list = NULL;
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for (i = 0; i < x11_screen->nvisuals; ++i)
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list = g_list_append (list, x11_screen->visuals[i]);
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return list;
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}
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/**
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* gdk_x11_screen_lookup_visual:
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* @screen: (type GdkX11Screen): a #GdkScreen.
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* @xvisualid: an X Visual ID.
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*
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* Looks up the #GdkVisual for a particular screen and X Visual ID.
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*
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* Returns: (transfer none) (type GdkX11Visual): the #GdkVisual (owned by the screen
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* object), or %NULL if the visual ID wasn’t found.
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*
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* Since: 2.2
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*/
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GdkVisual *
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gdk_x11_screen_lookup_visual (GdkScreen *screen,
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VisualID xvisualid)
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{
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int i;
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GdkX11Screen *x11_screen;
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g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
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x11_screen = GDK_X11_SCREEN (screen);
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|
||
for (i = 0; i < x11_screen->nvisuals; i++)
|
||
if (xvisualid == GDK_X11_VISUAL (x11_screen->visuals[i])->xvisual->visualid)
|
||
return x11_screen->visuals[i];
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
gdk_visual_add (GdkVisual *visual)
|
||
{
|
||
GdkX11Screen *x11_screen = GDK_X11_SCREEN (visual->screen);
|
||
|
||
if (!x11_screen->visual_hash)
|
||
x11_screen->visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
|
||
(GEqualFunc) gdk_visual_equal);
|
||
|
||
g_hash_table_insert (x11_screen->visual_hash, GDK_X11_VISUAL (visual)->xvisual, visual);
|
||
}
|
||
|
||
static void
|
||
gdk_visual_decompose_mask (gulong mask,
|
||
gint *shift,
|
||
gint *prec)
|
||
{
|
||
*shift = 0;
|
||
*prec = 0;
|
||
|
||
if (mask == 0)
|
||
{
|
||
g_warning ("Mask is 0 in visual. Server bug ?");
|
||
return;
|
||
}
|
||
|
||
while (!(mask & 0x1))
|
||
{
|
||
(*shift)++;
|
||
mask >>= 1;
|
||
}
|
||
|
||
while (mask & 0x1)
|
||
{
|
||
(*prec)++;
|
||
mask >>= 1;
|
||
}
|
||
}
|
||
|
||
static guint
|
||
gdk_visual_hash (Visual *key)
|
||
{
|
||
return key->visualid;
|
||
}
|
||
|
||
static gboolean
|
||
gdk_visual_equal (Visual *a,
|
||
Visual *b)
|
||
{
|
||
return (a->visualid == b->visualid);
|
||
}
|
||
|
||
/**
|
||
* _gdk_visual_get_x11_colormap:
|
||
* @visual: the visual to get the colormap from
|
||
*
|
||
* Gets the colormap to use
|
||
*
|
||
* Returns: the X Colormap to use for new windows using @visual
|
||
**/
|
||
Colormap
|
||
_gdk_visual_get_x11_colormap (GdkVisual *visual)
|
||
{
|
||
GdkX11Visual *x11_visual;
|
||
|
||
g_return_val_if_fail (GDK_IS_VISUAL (visual), None);
|
||
|
||
x11_visual = GDK_X11_VISUAL (visual);
|
||
|
||
if (x11_visual->colormap == None)
|
||
{
|
||
x11_visual->colormap = XCreateColormap (GDK_SCREEN_XDISPLAY (visual->screen),
|
||
GDK_SCREEN_XROOTWIN (visual->screen),
|
||
x11_visual->xvisual,
|
||
AllocNone);
|
||
}
|
||
|
||
return x11_visual->colormap;
|
||
}
|
||
|
||
/**
|
||
* gdk_x11_visual_get_xvisual:
|
||
* @visual: (type GdkX11Visual): a #GdkVisual.
|
||
*
|
||
* Returns the X visual belonging to a #GdkVisual.
|
||
*
|
||
* Returns: (transfer none): an Xlib Visual*.
|
||
**/
|
||
Visual *
|
||
gdk_x11_visual_get_xvisual (GdkVisual *visual)
|
||
{
|
||
g_return_val_if_fail (GDK_IS_VISUAL (visual), NULL);
|
||
|
||
return GDK_X11_VISUAL (visual)->xvisual;
|
||
}
|