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cc65/samples/plasma.c
uz ed2767e65f Changed names of the pragmas to be identical to the corresponding command line 
options. This should make use easier. The old names of the pragmas are still
available but will cause warnings.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4364 b7a2c559-68d2-44c3-8de9-860c34a00d81
2009-10-14 12:55:15 +00:00

304 lines
8.2 KiB
C
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/*****************************************************************************
* plasma test program for cc65. *
* *
* (w)2001 by groepaz/hitmen *
* *
* Cleanup and porting by Ullrich von Bassewitz. *
* *
*****************************************************************************/
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#if defined(__C64__) || defined(__C128__)
# define SCREEN1 0xE000
# define SCREEN2 0xE400
# define CHARSET 0xE800
# define outb(addr,val) (*(addr)) = (val)
# define inb(addr) (*(addr))
#elif defined(__CBM510__)
# define SCREEN1 0xF000
# define SCREEN2 0xF400
# define CHARSET 0xE000
# define outb(addr,val) pokebsys ((unsigned)(addr), val)
# define inb(addr) peekbsys ((unsigned)(addr))
#elif defined(__PLUS4__)
# define SCREEN1 0x6400
# define SCREEN2 0x6C00
# define CHARSET 0x7000
# define outb(addr,val) (*(addr)) = (val)
# define inb(addr) (*(addr))
#endif
/* Values for the VIC address register to switch between the two pages */
#if defined(__PLUS4__)
#define PAGE1 ((SCREEN1 >> 8) & 0xF8)
#define PAGE2 ((SCREEN2 >> 8) & 0xF8)
#define CHARADR ((CHARSET >> 8) & 0xFC)
#else
#define PAGE1 ((SCREEN1 >> 6) & 0xF0) | ((CHARSET >> 10) & 0x0E)
#define PAGE2 ((SCREEN2 >> 6) & 0xF0) | ((CHARSET >> 10) & 0x0E)
#endif
/* Use static local variables for speed */
#pragma static-locals (1);
static const unsigned char sinustable[0x100] = {
0x80, 0x7d, 0x7a, 0x77, 0x74, 0x70, 0x6d, 0x6a,
0x67, 0x64, 0x61, 0x5e, 0x5b, 0x58, 0x55, 0x52,
0x4f, 0x4d, 0x4a, 0x47, 0x44, 0x41, 0x3f, 0x3c,
0x39, 0x37, 0x34, 0x32, 0x2f, 0x2d, 0x2b, 0x28,
0x26, 0x24, 0x22, 0x20, 0x1e, 0x1c, 0x1a, 0x18,
0x16, 0x15, 0x13, 0x11, 0x10, 0x0f, 0x0d, 0x0c,
0x0b, 0x0a, 0x08, 0x07, 0x06, 0x06, 0x05, 0x04,
0x03, 0x03, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x03,
0x03, 0x04, 0x05, 0x06, 0x06, 0x07, 0x08, 0x0a,
0x0b, 0x0c, 0x0d, 0x0f, 0x10, 0x11, 0x13, 0x15,
0x16, 0x18, 0x1a, 0x1c, 0x1e, 0x20, 0x22, 0x24,
0x26, 0x28, 0x2b, 0x2d, 0x2f, 0x32, 0x34, 0x37,
0x39, 0x3c, 0x3f, 0x41, 0x44, 0x47, 0x4a, 0x4d,
0x4f, 0x52, 0x55, 0x58, 0x5b, 0x5e, 0x61, 0x64,
0x67, 0x6a, 0x6d, 0x70, 0x74, 0x77, 0x7a, 0x7d,
0x80, 0x83, 0x86, 0x89, 0x8c, 0x90, 0x93, 0x96,
0x99, 0x9c, 0x9f, 0xa2, 0xa5, 0xa8, 0xab, 0xae,
0xb1, 0xb3, 0xb6, 0xb9, 0xbc, 0xbf, 0xc1, 0xc4,
0xc7, 0xc9, 0xcc, 0xce, 0xd1, 0xd3, 0xd5, 0xd8,
0xda, 0xdc, 0xde, 0xe0, 0xe2, 0xe4, 0xe6, 0xe8,
0xea, 0xeb, 0xed, 0xef, 0xf0, 0xf1, 0xf3, 0xf4,
0xf5, 0xf6, 0xf8, 0xf9, 0xfa, 0xfa, 0xfb, 0xfc,
0xfd, 0xfd, 0xfe, 0xfe, 0xfe, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xfe, 0xfe, 0xfe, 0xfd,
0xfd, 0xfc, 0xfb, 0xfa, 0xfa, 0xf9, 0xf8, 0xf6,
0xf5, 0xf4, 0xf3, 0xf1, 0xf0, 0xef, 0xed, 0xeb,
0xea, 0xe8, 0xe6, 0xe4, 0xe2, 0xe0, 0xde, 0xdc,
0xda, 0xd8, 0xd5, 0xd3, 0xd1, 0xce, 0xcc, 0xc9,
0xc7, 0xc4, 0xc1, 0xbf, 0xbc, 0xb9, 0xb6, 0xb3,
0xb1, 0xae, 0xab, 0xa8, 0xa5, 0xa2, 0x9f, 0x9c,
0x99, 0x96, 0x93, 0x90, 0x8c, 0x89, 0x86, 0x83
};
static void doplasma (register unsigned char* scrn)
{
unsigned char xbuf[40];
unsigned char ybuf[25];
unsigned char c1a,c1b;
unsigned char c2a,c2b;
unsigned char c1A,c1B;
unsigned char c2A,c2B;
register unsigned char i, ii;
c1a = c1A;
c1b = c1B;
for (ii = 0; ii < 25; ++ii) {
ybuf[ii] = (sinustable[c1a] + sinustable[c1b]);
c1a += 4;
c1b += 9;
}
c1A += 3;
c1B -= 5;
c2a = c2A;
c2b = c2B;
for (i = 0; i < 40; ++i) {
xbuf[i] = (sinustable[c2a] + sinustable[c2b]);
c2a += 3;
c2b += 7;
}
c2A += 2;
c2B -= 3;
for (ii = 0; ii < 25; ++ii) {
/* Unrolling the following loop will give a speed increase of
* nearly 100% (~24fps), but it will also increase the code
* size a lot.
*/
for (i = 0; i < 40; ++i, ++scrn) {
*scrn = (xbuf[i] + ybuf[ii]);
}
}
}
static void makechar (void)
{
static const unsigned char bittab[8] = {
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80
};
unsigned char i, ii, b, s;
unsigned c;
gotoxy (0, 1);
for (c = 0; c < 0x100; ++c) {
s = sinustable[c];
for (i = 0; i < 8; ++i){
b = 0;
for (ii = 0; ii < 8; ++ii) {
if ((rand() & 0xFF) > s) {
b |= bittab[ii];
}
}
((unsigned char*)CHARSET) [(c*8) + i] = b;
}
if ((c & 0x07) == 0) {
cputc ('.');
}
}
}
int main (void)
{
unsigned char border;
unsigned char background;
unsigned char text;
unsigned char v;
clock_t t;
unsigned long f = 0;
unsigned long sec;
unsigned sec10;
unsigned long fps;
unsigned fps10;
#if defined(__C64__)
unsigned char block;
#endif
#if defined(__C128__)
unsigned char block;
unsigned char initflag;
unsigned char graphflag;
#endif
#if defined(__PLUS4__)
unsigned int i;
unsigned char v2;
#endif
clrscr ();
cprintf ("Making charset, mompls");
makechar();
/* Set the border and background colors */
border = bordercolor (COLOR_BLUE);
background = bgcolor (COLOR_BLUE);
text = textcolor (COLOR_BLACK);
clrscr ();
#if defined(__C64__) || defined(__C128__)
/* Move the VIC 16K block */
block = inb (&CIA2.pra);
outb (&CIA2.pra, (block & 0xFC) | ((SCREEN1 >> 14) ^ 0x03));
#endif
#if defined(__C128__)
/* Save and change some flags, so that kernal/basic interupt handler will
* not interfere with our routine.
*/
initflag = *(unsigned char*) 0xA04;
*(unsigned char*) 0xA04 &= 0xFE;
graphflag = *(unsigned char*) 0xD8;
*(unsigned char*) 0xD8 = 0xFF;
#endif
/* Remember the VIC address register */
#if defined(__PLUS4__)
v = inb (&TED.char_addr);
v2 = inb (&TED.video_addr);
#else
v = inb (&VIC.addr);
#endif
#if defined(__PLUS4__)
for (i=0;i<1000;i++) {
((unsigned char *) (SCREEN1-0x0400))[i] = 0;
((unsigned char *) (SCREEN2-0x0400))[i] = 0;
}
outb (&TED.char_addr, CHARADR);
#endif
/* Run the demo until a key was hit */
t = clock ();
while (!kbhit()) {
/* Build page 1, then make it visible */
doplasma ((unsigned char*)SCREEN1);
#if defined(__PLUS4__)
outb (&TED.video_addr, PAGE1);
#else
outb (&VIC.addr, PAGE1);
#endif
/* Build page 2, then make it visible */
doplasma ((unsigned char*)SCREEN2);
#if defined(__PLUS4__)
outb (&TED.video_addr, PAGE2);
#else
outb (&VIC.addr, PAGE2);
#endif
/* Count frames */
f += 2;
}
t = clock() - t;
/* Switch back the VIC screen */
#if defined(__PLUS4__)
outb (&TED.video_addr, v2);
outb (&TED.char_addr, v);
#else
outb (&VIC.addr, v);
#endif
#if defined(__C64__) || defined(__C128__)
/* Move back the VIC 16K block */
outb (&CIA2.pra, block);
#endif
#if defined(__C128__)
/* Restore the flags */
*(unsigned char*) 0xA04 = initflag;
*(unsigned char*) 0xD8 = graphflag;
#endif
/* Fetch the character from the keyboard buffer and discard it */
(void) cgetc();
/* Reset screen colors */
bordercolor (border);
bgcolor (background);
textcolor (text);
clrscr ();
/* Calculate stats */
sec = (t * 10) / CLK_TCK;
sec10 = sec % 10;
sec /= 10;
fps = (f * (CLK_TCK * 10)) / t;
fps10 = fps % 10;
fps /= 10;
/* Output stats */
gotoxy (0, 0); cprintf ("time : %lu.%us", sec, sec10);
gotoxy (0, 1); cprintf ("frames: %lu", f);
gotoxy (0, 2); cprintf ("fps : %lu.%u", fps, fps10);
/* Wait for a key, then end */
cputsxy (0, 4, "Press any key when done...");
(void) cgetc ();
/* Done */
return EXIT_SUCCESS;
}
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