1 /* StonerView: An eccentric visual toy.
2 Copyright 1998-2001 by Andrew Plotkin (erkyrath@eblong.com)
4 For the latest version, source code, and links to more of my stuff, see:
5 http://www.eblong.com/zarf/stonerview.html
7 Permission to use, copy, modify, distribute, and sell this software and its
8 documentation for any purpose is hereby granted without fee, provided that
9 the above copyright notice appear in all copies and that both that
10 copyright notice and this permission notice appear in supporting
11 documentation. No representations are made about the suitability of this
12 software for any purpose. It is provided "as is" without express or
16 /* Ported away from GLUT (so that it can do `-root' and work with xscreensaver)
17 by Jamie Zawinski <jwz@jwz.org>, 22-Jan-2001.
19 Revamped to work in the xlockmore framework so that it will also work
20 with the MacOS X port of xscreensaver by jwz, 21-Feb-2006.
23 #define DEFAULTS "*delay: 20000 \n" \
24 "*showFPS: False \n" \
25 "*wireframe: False \n"
27 # define refresh_stonerview 0
29 #define countof(x) (sizeof((x))/sizeof((*x)))
31 #include "xlockmore.h"
33 #ifdef USE_GL /* whole file */
35 #include "stonerview.h"
36 #include "gltrackball.h"
38 #define DEF_TRANSPARENT "True"
41 GLXContext *glx_context;
43 trackball_state *trackball;
45 } stonerview_configuration;
47 static stonerview_configuration *bps = NULL;
49 static Bool transparent_p;
52 static XrmOptionDescRec opts[] = {
53 { "-transparent", ".transparent", XrmoptionNoArg, "True" },
54 { "+transparent", ".transparent", XrmoptionNoArg, "False" },
57 static argtype vars[] = {
58 {&transparent_p, "transparent", "Transparent", DEF_TRANSPARENT, t_Bool},
61 ENTRYPOINT ModeSpecOpt stonerview_opts = {countof(opts), opts, countof(vars), vars, NULL};
65 reshape_stonerview (ModeInfo *mi, int width, int height)
67 GLfloat h = (GLfloat) height / (GLfloat) width;
69 glViewport(0, 0, (GLint) width, (GLint) height);
70 glMatrixMode(GL_PROJECTION);
72 glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
73 glMatrixMode(GL_MODELVIEW);
75 glTranslatef(0.0, 0.0, -40.0);
80 init_stonerview (ModeInfo *mi)
82 stonerview_configuration *bp;
85 bps = (stonerview_configuration *)
86 calloc (MI_NUM_SCREENS(mi), sizeof (stonerview_configuration));
88 fprintf(stderr, "%s: out of memory\n", progname);
93 bp = &bps[MI_SCREEN(mi)];
95 bp->glx_context = init_GL(mi);
97 bp->trackball = gltrackball_init (False);
98 bp->st = stonerview_init_view(MI_IS_WIREFRAME(mi), transparent_p);
99 stonerview_init_move(bp->st);
101 reshape_stonerview (mi, MI_WIDTH(mi), MI_HEIGHT(mi));
102 clear_gl_error(); /* WTF? sometimes "invalid op" from glViewport! */
107 draw_stonerview (ModeInfo *mi)
109 stonerview_configuration *bp = &bps[MI_SCREEN(mi)];
111 glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(bp->glx_context));
114 glRotatef( current_device_rotation(), 0, 0, 1);
115 gltrackball_rotate (bp->trackball);
117 stonerview_win_draw(bp->st);
118 if (! bp->button_down_p)
119 stonerview_move_increment(bp->st);
122 mi->polygon_count = NUM_ELS;
123 if (mi->fps_p) do_fps (mi);
126 glXSwapBuffers(MI_DISPLAY (mi), MI_WINDOW(mi));
130 release_stonerview (ModeInfo *mi)
134 for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
135 stonerview_configuration *bp = &bps[screen];
137 stonerview_win_release (bp->st);
146 stonerview_handle_event (ModeInfo *mi, XEvent *event)
148 stonerview_configuration *bp = &bps[MI_SCREEN(mi)];
150 if (gltrackball_event_handler (event, bp->trackball,
151 MI_WIDTH (mi), MI_HEIGHT (mi),
158 XSCREENSAVER_MODULE ("StonerView", stonerview)