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Diffstat (limited to 'src/gs-visual-gl.c')
| -rw-r--r-- | src/gs-visual-gl.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/gs-visual-gl.c b/src/gs-visual-gl.c new file mode 100644 index 0000000..7a71c79 --- /dev/null +++ b/src/gs-visual-gl.c @@ -0,0 +1,116 @@ +/* -*- 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; +} |