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 # ifdef HAVE_MOBILE /* Keep it the same relative size when rotated. */
119 GLfloat h = MI_HEIGHT(mi) / (GLfloat) MI_WIDTH(mi);
120 int o = (int) current_device_rotation();
121 if (o != 0 && o != 180 && o != -180)
126 stonerview_win_draw(bp->st);
127 if (! bp->button_down_p)
128 stonerview_move_increment(bp->st);
131 mi->polygon_count = NUM_ELS;
132 if (mi->fps_p) do_fps (mi);
135 glXSwapBuffers(MI_DISPLAY (mi), MI_WINDOW(mi));
139 release_stonerview (ModeInfo *mi)
143 for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
144 stonerview_configuration *bp = &bps[screen];
146 stonerview_win_release (bp->st);
155 stonerview_handle_event (ModeInfo *mi, XEvent *event)
157 stonerview_configuration *bp = &bps[MI_SCREEN(mi)];
159 if (gltrackball_event_handler (event, bp->trackball,
160 MI_WIDTH (mi), MI_HEIGHT (mi),
167 XSCREENSAVER_MODULE ("StonerView", stonerview)