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1 files changed, 116 insertions, 0 deletions

diff --git a/src/gs-visual-gl.c b/src/gs-visual-gl.c
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+++ b/src/gs-visual-gl.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2006 William Jon McCann <[email protected]>
+ * Copyright (C) 1999, 2000, 2003 Jamie Zawinski <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <gdk/gdk.h>
+#include <gdk/gdkx.h>
+#include <gtk/gtk.h>
+
+#ifdef HAVE_LIBGL
+#include <GL/gl.h>
+#include <GL/glx.h>
+#endif /* HAVE_GL */
+
+#include "gs-visual-gl.h"
+#include "gs-debug.h"
+
+GdkVisual *
+gs_visual_gl_get_best_for_screen (GdkScreen *screen)
+{
+	GdkVisual  *visual;
+#ifdef HAVE_LIBGL
+	GdkDisplay *display;
+	int         screen_num;
+	int         i;
+
+# define R GLX_RED_SIZE
+# define G GLX_GREEN_SIZE
+# define B GLX_BLUE_SIZE
+# define D GLX_DEPTH_SIZE
+# define I GLX_BUFFER_SIZE
+# define DB GLX_DOUBLEBUFFER
+# define ST GLX_STENCIL_SIZE
+
+	static int attrs [][20] =
+	{
+		{ GLX_RGBA, R, 8, G, 8, B, 8, D, 8, DB, ST,1, 0 }, /* rgb double, stencil */
+		{ GLX_RGBA, R, 4, G, 4, B, 4, D, 4, DB, ST,1, 0 },
+		{ GLX_RGBA, R, 2, G, 2, B, 2, D, 2, DB, ST,1, 0 },
+		{ GLX_RGBA, R, 8, G, 8, B, 8, D, 8, DB,       0 }, /* rgb double */
+		{ GLX_RGBA, R, 4, G, 4, B, 4, D, 4, DB,       0 },
+		{ GLX_RGBA, R, 2, G, 2, B, 2, D, 2, DB,       0 },
+		{ GLX_RGBA, R, 8, G, 8, B, 8, D, 8,           0 }, /* rgb single */
+		{ GLX_RGBA, R, 4, G, 4, B, 4, D, 4,           0 },
+		{ GLX_RGBA, R, 2, G, 2, B, 2, D, 2,           0 },
+		{ I, 8,                       D, 8, DB,       0 }, /* cmap double */
+		{ I, 4,                       D, 4, DB,       0 },
+		{ I, 8,                       D, 8,           0 }, /* cmap single */
+		{ I, 4,                       D, 4,           0 },
+		{ GLX_RGBA, R, 1, G, 1, B, 1, D, 1,           0 }  /* monochrome */
+	};
+
+	g_return_val_if_fail (screen != NULL, NULL);
+
+	display = gdk_screen_get_display (screen);
+	screen_num = gdk_screen_get_number (screen);
+
+	gdk_error_trap_push ();
+
+	visual = NULL;
+	for (i = 0; i < G_N_ELEMENTS (attrs); i++)
+	{
+		XVisualInfo *vi;
+
+		vi = glXChooseVisual (GDK_DISPLAY_XDISPLAY (display), screen_num, attrs [i]);
+
+		if (vi != NULL)
+		{
+			VisualID   vid;
+
+			vid = XVisualIDFromVisual (vi->visual);
+
+			visual = gdkx_visual_get (vid);
+
+			XFree (vi);
+
+			if (visual != NULL)
+			{
+				break;
+			}
+		}
+	}
+
+	gdk_display_sync (display);
+	gdk_error_trap_pop ();
+
+#else
+	visual = NULL;
+
+#endif /* HAVE_LIBGL */
+
+	return visual;
+}