mirror of
https://github.com/cc65/cc65.git
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262 lines
7.2 KiB
C
262 lines
7.2 KiB
C
/*****************************************************************************
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* plasma test program for cc65. *
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* *
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* (w)2001 by groepaz/hitmen *
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* *
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* Cleanup and porting by Ullrich von Bassewitz. *
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* *
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*****************************************************************************/
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#include <stdlib.h>
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#include <time.h>
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#include <conio.h>
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#if defined(__C64__) || defined(__C128__)
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# define SCREEN1 0xE000
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# define SCREEN2 0xE400
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# define CHARSET 0xE800
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# define outb(addr,val) (*(addr)) = (val)
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# define inb(addr) (*(addr))
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#elif defined(__CBM510__)
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# define SCREEN1 0xF000
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# define SCREEN2 0xF400
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# define CHARSET 0xE000
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# define outb(addr,val) pokebsys ((unsigned)(addr), val)
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# define inb(addr) peekbsys ((unsigned)(addr))
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#endif
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/* Values for the VIC address register to switch between the two pages */
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#define PAGE1 ((SCREEN1 >> 6) & 0xF0) | ((CHARSET >> 10) & 0x0E)
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#define PAGE2 ((SCREEN2 >> 6) & 0xF0) | ((CHARSET >> 10) & 0x0E)
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/* Use static local variables for speed */
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#pragma staticlocals (1);
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static const unsigned char sinustable[0x100] = {
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0x80, 0x7d, 0x7a, 0x77, 0x74, 0x70, 0x6d, 0x6a,
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0x67, 0x64, 0x61, 0x5e, 0x5b, 0x58, 0x55, 0x52,
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0x4f, 0x4d, 0x4a, 0x47, 0x44, 0x41, 0x3f, 0x3c,
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0x39, 0x37, 0x34, 0x32, 0x2f, 0x2d, 0x2b, 0x28,
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0x26, 0x24, 0x22, 0x20, 0x1e, 0x1c, 0x1a, 0x18,
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0x16, 0x15, 0x13, 0x11, 0x10, 0x0f, 0x0d, 0x0c,
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0x0b, 0x0a, 0x08, 0x07, 0x06, 0x06, 0x05, 0x04,
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0x03, 0x03, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x03,
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0x03, 0x04, 0x05, 0x06, 0x06, 0x07, 0x08, 0x0a,
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0x0b, 0x0c, 0x0d, 0x0f, 0x10, 0x11, 0x13, 0x15,
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0x16, 0x18, 0x1a, 0x1c, 0x1e, 0x20, 0x22, 0x24,
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0x26, 0x28, 0x2b, 0x2d, 0x2f, 0x32, 0x34, 0x37,
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0x39, 0x3c, 0x3f, 0x41, 0x44, 0x47, 0x4a, 0x4d,
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0x4f, 0x52, 0x55, 0x58, 0x5b, 0x5e, 0x61, 0x64,
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0x67, 0x6a, 0x6d, 0x70, 0x74, 0x77, 0x7a, 0x7d,
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0x80, 0x83, 0x86, 0x89, 0x8c, 0x90, 0x93, 0x96,
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0x99, 0x9c, 0x9f, 0xa2, 0xa5, 0xa8, 0xab, 0xae,
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0xb1, 0xb3, 0xb6, 0xb9, 0xbc, 0xbf, 0xc1, 0xc4,
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0xc7, 0xc9, 0xcc, 0xce, 0xd1, 0xd3, 0xd5, 0xd8,
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0xda, 0xdc, 0xde, 0xe0, 0xe2, 0xe4, 0xe6, 0xe8,
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0xea, 0xeb, 0xed, 0xef, 0xf0, 0xf1, 0xf3, 0xf4,
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0xf5, 0xf6, 0xf8, 0xf9, 0xfa, 0xfa, 0xfb, 0xfc,
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0xfd, 0xfd, 0xfe, 0xfe, 0xfe, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xfe, 0xfe, 0xfe, 0xfd,
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0xfd, 0xfc, 0xfb, 0xfa, 0xfa, 0xf9, 0xf8, 0xf6,
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0xf5, 0xf4, 0xf3, 0xf1, 0xf0, 0xef, 0xed, 0xeb,
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0xea, 0xe8, 0xe6, 0xe4, 0xe2, 0xe0, 0xde, 0xdc,
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0xda, 0xd8, 0xd5, 0xd3, 0xd1, 0xce, 0xcc, 0xc9,
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0xc7, 0xc4, 0xc1, 0xbf, 0xbc, 0xb9, 0xb6, 0xb3,
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0xb1, 0xae, 0xab, 0xa8, 0xa5, 0xa2, 0x9f, 0x9c,
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0x99, 0x96, 0x93, 0x90, 0x8c, 0x89, 0x86, 0x83
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};
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static void doplasma (register unsigned char* scrn)
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{
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unsigned char xbuf[40];
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unsigned char ybuf[25];
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unsigned char c1a,c1b;
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unsigned char c2a,c2b;
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unsigned char c1A,c1B;
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unsigned char c2A,c2B;
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register unsigned char i, ii;
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c1a = c1A;
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c1b = c1B;
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for (ii = 0; ii < 25; ++ii) {
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ybuf[ii] = (sinustable[c1a] + sinustable[c1b]);
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c1a += 4;
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c1b += 9;
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}
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c1A += 3;
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c1B -= 5;
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c2a = c2A;
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c2b = c2B;
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for (i = 0; i < 40; ++i) {
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xbuf[i] = (sinustable[c2a] + sinustable[c2b]);
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c2a += 3;
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c2b += 7;
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}
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c2A += 2;
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c2B -= 3;
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for (ii = 0; ii < 25; ++ii) {
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/* Unrolling the following loop will give a speed increase of
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* nearly 100% (~24fps), but it will also increase the code
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* size a lot.
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*/
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for (i = 0; i < 40; ++i, ++scrn) {
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*scrn = (xbuf[i] + ybuf[ii]);
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}
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}
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}
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static void makechar (void)
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{
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static const unsigned char bittab[8] = {
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0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80
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};
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unsigned char i, ii, b, s;
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unsigned c;
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gotoxy (0, 1);
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for (c = 0; c < 0x100; ++c) {
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s = sinustable[c];
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for (i = 0; i < 8; ++i){
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b = 0;
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for (ii = 0; ii < 8; ++ii) {
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if ((rand() & 0xFF) > s) {
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b |= bittab[ii];
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}
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}
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((unsigned char*)CHARSET) [(c*8) + i] = b;
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}
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if ((c & 0x07) == 0) {
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cputc ('.');
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}
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}
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}
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int main (void)
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{
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unsigned char border;
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unsigned char background;
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unsigned char text;
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unsigned char v;
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clock_t t;
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unsigned long f = 0;
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unsigned long sec;
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unsigned sec10;
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unsigned long fps;
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unsigned fps10;
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#if defined(__C64__)
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unsigned char block;
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#endif
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#if defined(__C128__)
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unsigned char block;
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unsigned char initflag;
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unsigned char graphflag;
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#endif
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clrscr ();
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cprintf ("Making charset, mompls");
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makechar();
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/* Set the border and background colors */
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border = bordercolor (COLOR_BLUE);
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background = bgcolor (COLOR_BLUE);
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text = textcolor (COLOR_BLACK);
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clrscr ();
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#if defined(__C64__) || defined(__C128__)
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/* Move the VIC 16K block */
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block = inb (&CIA2.pra);
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outb (&CIA2.pra, (block & 0xFC) | ((SCREEN1 >> 14) ^ 0x03));
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#endif
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#if defined(__C128__)
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/* Save and change some flags, so that kernal/basic interupt handler will
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* not interfere with our routine.
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*/
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initflag = *(unsigned char*) 0xA04;
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*(unsigned char*) 0xA04 &= 0xFE;
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graphflag = *(unsigned char*) 0xD8;
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*(unsigned char*) 0xD8 = 0xFF;
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#endif
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/* Remember the VIC address register */
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v = inb (&VIC.addr);
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/* Run the demo until a key was hit */
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t = clock ();
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while (!kbhit()) {
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/* Build page 1, then make it visible */
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doplasma ((unsigned char*)SCREEN1);
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outb (&VIC.addr, PAGE1);
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/* Build page 2, then make it visible */
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doplasma ((unsigned char*)SCREEN2);
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outb (&VIC.addr, PAGE2);
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/* Count frames */
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f += 2;
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}
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t = clock() - t;
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/* Switch back the VIC screen */
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outb (&VIC.addr, v);
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#if defined(__C64__) || defined(__C128__)
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/* Move back the VIC 16K block */
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outb (&CIA2.pra, block);
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#endif
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#if defined(__C128__)
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/* Restore the flags */
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*(unsigned char*) 0xA04 = initflag;
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*(unsigned char*) 0xD8 = graphflag;
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#endif
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/* Fetch the character from the keyboard buffer and discard it */
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(void) cgetc();
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/* Reset screen colors */
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bordercolor (border);
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bgcolor (background);
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textcolor (text);
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clrscr ();
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/* Calculate stats */
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sec = (t * 10) / CLK_TCK;
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sec10 = sec % 10;
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sec /= 10;
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fps = (f * (CLK_TCK * 10)) / t;
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fps10 = fps % 10;
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fps /= 10;
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/* Output stats */
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gotoxy (0, 0); cprintf ("time : %lu.%us", sec, sec10);
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gotoxy (0, 1); cprintf ("frames: %lu", f);
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gotoxy (0, 2); cprintf ("fps : %lu.%u", fps, fps10);
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/* Wait for a key, then end */
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cputsxy (0, 4, "Press any key when done...");
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(void) cgetc ();
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/* Done */
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return EXIT_SUCCESS;
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}
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