1 /* -*- indent-tabs-mode:nil -*-
2 * Copyright (c) 2007 Jeremy English <jhe@jeremyenglish.org>
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation. No representations are made about the suitability of this
9 * software for any purpose. It is provided "as is" without express or
12 * Created: 07-May-2007
17 #include "screenhack.h"
22 __extension__ /* don't warn about "string length is greater than the length
23 ISO C89 compilers are required to support" when includng
24 the following data file... */
26 const char * const demo_files[] = {
31 /* We want to paint on a 32 by 32 grid of pixels. We will needed to
32 divided the screen up into chuncks */
34 SCREEN_W = ANALOGTV_VIS_LEN,
35 SCREEN_H = ANALOGTV_VISLINES,
45 machine_6502 *machine;
49 analogtv_reception reception;
50 int pixw; /* pixel width */
51 int pixh;/* pixel height */
52 int topb;/* top boarder */
53 int field_ntsc[4];/* used for clearing the screen*/
54 int dt;/* how long to wait before changing the demo*/
55 int which;/* the program to run*/
56 int demos;/* number of demos included */
57 struct timeval start_time;
61 plot6502(Bit8 x, Bit8 y, Bit8 color, void *closure)
63 struct state *st = (struct state *) closure;
64 st->pixels[x][y] = color;
68 #define countof(x) (sizeof((x))/sizeof((*x)))
72 start_rand_bin_prog(machine_6502 *machine, struct state *st){
75 n = random() % st->demos;
77 start_eval_string(machine, demo_files[st->which], plot6502, st);
84 * returns the total time elapsed since the beginning of the demo
86 static double get_time(struct state *st) {
89 #if GETTIMEOFDAY_TWO_ARGS
90 gettimeofday(&t, NULL);
94 t.tv_sec -= st->start_time.tv_sec;
95 f = ((double)t.tv_sec) + t.tv_usec*1e-6;
102 * initialises the timing structures
104 static void init_time(struct state *st) {
105 #if GETTIMEOFDAY_TWO_ARGS
106 gettimeofday(&st->start_time, NULL);
108 gettimeofday(&st->start_time);
113 m6502_init (Display *dpy, Window window)
115 struct state *st = (struct state *) calloc (1, sizeof(*st));
117 char *s = get_string_resource (dpy, "file", "File");
118 int n = get_integer_resource(dpy, "displaytime", "Displaytime");
120 st->demos = countof(demo_files);
121 st->which = random() % st->demos;
125 st->tv=analogtv_allocate(st->dpy, st->window);
126 analogtv_set_defaults(st->tv, "");
128 st->machine = build6502();
129 st->inp=analogtv_input_allocate();
130 analogtv_setup_sync(st->inp, 1, 0);
132 st->reception.input = st->inp;
133 st->reception.level = 2.0;
136 st->reception.multipath=0.0;
137 st->pixw = SCREEN_W / 32;
138 st->pixh = SCREEN_H / 32;
145 start_eval_file(st->machine,s, plot6502, st);
147 start_rand_bin_prog(st->machine,st);
149 analogtv_lcp_to_ntsc(ANALOGTV_BLACK_LEVEL, 0.0, 0.0, st->field_ntsc);
151 analogtv_draw_solid(st->inp,
152 ANALOGTV_VIS_START, ANALOGTV_VIS_END,
153 ANALOGTV_TOP, ANALOGTV_BOT,
156 for(x = 0; x < 32; x++)
157 for(y = 0; y < 32; y++)
158 st->pixels[x][y] = 0;
164 paint_pixel(struct state *st, int x, int y, int idx)
166 double clr_tbl[16][3] = {
186 /* RGB conversion taken from analogtv draw xpm */
187 rawy=( 5*clr_tbl[idx][0] + 11*clr_tbl[idx][1] + 2*clr_tbl[idx][2]) / 64;
188 rawi=(10*clr_tbl[idx][0] - 4*clr_tbl[idx][1] - 5*clr_tbl[idx][2]) / 64;
189 rawq=( 3*clr_tbl[idx][0] - 8*clr_tbl[idx][1] + 5*clr_tbl[idx][2]) / 64;
196 for (i=0; i<4; i++) {
197 if (ntsc[i]>ANALOGTV_WHITE_LEVEL) ntsc[i]=ANALOGTV_WHITE_LEVEL;
198 if (ntsc[i]<ANALOGTV_BLACK_LEVEL) ntsc[i]=ANALOGTV_BLACK_LEVEL;
205 analogtv_draw_solid(st->inp,
206 ANALOGTV_VIS_START + x, ANALOGTV_VIS_START + x + st->pixw,
207 ANALOGTV_TOP + y, ANALOGTV_TOP + y + st->pixh, ntsc);
211 m6502_draw (Display *dpy, Window window, void *closure)
213 struct state *st = (struct state *) closure;
214 unsigned int x = 0, y = 0;
217 next_eval(st->machine,500);
219 for (x = 0; x < 32; x++)
220 for (y = 0; y < 32; y++)
221 paint_pixel(st,x,y,st->pixels[x][y]);
223 analogtv_init_signal(st->tv, 0.04);
224 analogtv_reception_update(&st->reception);
225 analogtv_add_signal(st->tv, &st->reception);
226 analogtv_draw(st->tv);
229 if (te > st->dt){ /* do something more interesting here XXX */
230 for(x = 0; x < 32; x++)
231 for(y = 0; y < 32; y++)
232 st->pixels[x][y] = 0;
234 start_rand_bin_prog(st->machine,st);
243 static const char *m6502_defaults [] = {
244 ".background: black",
245 ".foreground: white",
253 static XrmOptionDescRec m6502_options [] = {
254 { "-file", ".file", XrmoptionSepArg, 0 },
255 { "-displaytime", ".displaytime", XrmoptionSepArg, 0},
261 m6502_reshape (Display *dpy, Window window, void *closure,
262 unsigned int w, unsigned int h)
264 struct state *st = (struct state *) closure;
265 analogtv_reconfigure (st->tv);
269 m6502_event (Display *dpy, Window window, void *closure, XEvent *event)
275 m6502_free (Display *dpy, Window window, void *closure)
277 struct state *st = (struct state *) closure;
278 analogtv_release(st->tv);
282 XSCREENSAVER_MODULE ("m6502", m6502)