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 static const char * const demo_files[] = {
36 /* We want to paint on a 32 by 32 grid of pixels. We will needed to
37 divided the screen up into chuncks */
39 SCREEN_W = ANALOGTV_VIS_LEN,
40 SCREEN_H = ANALOGTV_VISLINES,
50 machine_6502 *machine;
54 analogtv_reception reception;
55 int pixw; /* pixel width */
56 int pixh;/* pixel height */
57 int topb;/* top boarder */
58 int field_ntsc[4];/* used for clearing the screen*/
59 int dt;/* how long to wait before changing the demo*/
60 int which;/* the program to run*/
61 int demos;/* number of demos included */
62 struct timeval start_time;
66 plot6502(Bit8 x, Bit8 y, Bit8 color, void *closure)
68 struct state *st = (struct state *) closure;
69 st->pixels[x][y] = color;
73 #define countof(x) (sizeof((x))/sizeof((*x)))
77 start_rand_bin_prog(machine_6502 *machine, struct state *st){
80 n = random() % st->demos;
82 m6502_start_eval_string(machine, demo_files[st->which], plot6502, st);
89 * returns the total time elapsed since the beginning of the demo
91 static double get_time(struct state *st) {
94 #if GETTIMEOFDAY_TWO_ARGS
95 gettimeofday(&t, NULL);
99 t.tv_sec -= st->start_time.tv_sec;
100 f = ((double)t.tv_sec) + t.tv_usec*1e-6;
107 * initialises the timing structures
109 static void init_time(struct state *st) {
110 #if GETTIMEOFDAY_TWO_ARGS
111 gettimeofday(&st->start_time, NULL);
113 gettimeofday(&st->start_time);
118 m6502_init (Display *dpy, Window window)
120 struct state *st = (struct state *) calloc (1, sizeof(*st));
122 int n = get_integer_resource(dpy, "displaytime", "Displaytime");
124 st->demos = countof(demo_files);
125 st->which = random() % st->demos;
129 st->tv=analogtv_allocate(st->dpy, st->window);
130 analogtv_set_defaults(st->tv, "");
132 st->machine = m6502_build();
133 st->inp=analogtv_input_allocate();
134 analogtv_setup_sync(st->inp, 1, 0);
136 st->reception.input = st->inp;
137 st->reception.level = 2.0;
140 st->reception.multipath=0.0;
141 st->pixw = SCREEN_W / 32;
142 st->pixh = SCREEN_H / 32;
150 char *s = get_string_resource (dpy, "file", "File");
152 m6502_start_eval_file(st->machine,s, plot6502, st);
155 start_rand_bin_prog(st->machine,st);
158 analogtv_lcp_to_ntsc(ANALOGTV_BLACK_LEVEL, 0.0, 0.0, st->field_ntsc);
160 analogtv_draw_solid(st->inp,
161 ANALOGTV_VIS_START, ANALOGTV_VIS_END,
162 ANALOGTV_TOP, ANALOGTV_BOT,
165 for(x = 0; x < 32; x++)
166 for(y = 0; y < 32; y++)
167 st->pixels[x][y] = 0;
173 paint_pixel(struct state *st, int x, int y, int idx)
175 double clr_tbl[16][3] = {
195 /* RGB conversion taken from analogtv draw xpm */
196 rawy=( 5*clr_tbl[idx][0] + 11*clr_tbl[idx][1] + 2*clr_tbl[idx][2]) / 64;
197 rawi=(10*clr_tbl[idx][0] - 4*clr_tbl[idx][1] - 5*clr_tbl[idx][2]) / 64;
198 rawq=( 3*clr_tbl[idx][0] - 8*clr_tbl[idx][1] + 5*clr_tbl[idx][2]) / 64;
205 for (i=0; i<4; i++) {
206 if (ntsc[i]>ANALOGTV_WHITE_LEVEL) ntsc[i]=ANALOGTV_WHITE_LEVEL;
207 if (ntsc[i]<ANALOGTV_BLACK_LEVEL) ntsc[i]=ANALOGTV_BLACK_LEVEL;
214 analogtv_draw_solid(st->inp,
215 ANALOGTV_VIS_START + x, ANALOGTV_VIS_START + x + st->pixw,
216 ANALOGTV_TOP + y, ANALOGTV_TOP + y + st->pixh, ntsc);
220 m6502_draw (Display *dpy, Window window, void *closure)
222 struct state *st = (struct state *) closure;
223 unsigned int x = 0, y = 0;
226 m6502_next_eval(st->machine,500);
228 for (x = 0; x < 32; x++)
229 for (y = 0; y < 32; y++)
230 paint_pixel(st,x,y,st->pixels[x][y]);
232 analogtv_init_signal(st->tv, 0.04);
233 analogtv_reception_update(&st->reception);
234 analogtv_add_signal(st->tv, &st->reception);
235 analogtv_draw(st->tv);
238 if (te > st->dt){ /* do something more interesting here XXX */
239 for(x = 0; x < 32; x++)
240 for(y = 0; y < 32; y++)
241 st->pixels[x][y] = 0;
243 start_rand_bin_prog(st->machine,st);
252 static const char *m6502_defaults [] = {
253 ".background: black",
254 ".foreground: white",
261 static XrmOptionDescRec m6502_options [] = {
262 { "-file", ".file", XrmoptionSepArg, 0 },
263 { "-displaytime", ".displaytime", XrmoptionSepArg, 0},
269 m6502_reshape (Display *dpy, Window window, void *closure,
270 unsigned int w, unsigned int h)
272 struct state *st = (struct state *) closure;
273 analogtv_reconfigure (st->tv);
277 m6502_event (Display *dpy, Window window, void *closure, XEvent *event)
283 m6502_free (Display *dpy, Window window, void *closure)
285 struct state *st = (struct state *) closure;
286 analogtv_release(st->tv);
290 XSCREENSAVER_MODULE ("m6502", m6502)