int main(void)
{
vga_init();
/* Create virtual screen. */
vbuf = malloc(VWIDTH * VHEIGHT);
gl_setcontextvirtual(VWIDTH, VHEIGHT, 1, 8, vbuf);
/* Set Mode X-style 320x240x256. */
vga_setmode(G320x240x256);
gl_setrgbpalette();
vga_clear();
boxes();
demo1();
demo2();
vga_setmode(G320x200x256); /* Set linear 320x200x256. */
gl_setrgbpalette();
demo3();
vga_setmode(TEXT);
exit(0);
}
void test(void)
{
int i, j;
unsigned char *bitmap;
GraphicsContext *savedcontext;
if (VIRTUAL)
gl_setcontext(backscreen);
gl_clearscreen(0);
for (i = 0; i < 5; i++) {
gl_clearscreen(0);
for (j = 0; j < 20000; j++)
gl_setpixel(random() % WIDTH, random() % HEIGHT,
random() % COLORS);
}
if (VIRTUAL)
gl_copyscreen(physicalscreen);
gl_clearscreen(0);
for (i = 0; i < 5000; i++) {
int x, y;
x = random() % (WIDTH - 1);
y = random() % (HEIGHT - 1);
gl_fillbox(x, y, random() % (WIDTH - x), random()
% (HEIGHT - y), random() % COLORS);
}
if (VIRTUAL)
gl_copyscreen(physicalscreen);
gl_clearscreen(0);
for (i = 0; i < 4000; i++)
gl_line(random() % WIDTH, random() % HEIGHT,
random() % WIDTH, random() % HEIGHT,
random() % COLORS);
if (VIRTUAL)
gl_copyscreen(physicalscreen);
/* Create bitmap. */
bitmap = malloc(64 * 64 * BYTESPERPIXEL);
/* Create temporary graphics context to create bitmap in. */
savedcontext = gl_allocatecontext();
gl_getcontext(savedcontext);
gl_setcontextvirtual(64, 64, BYTESPERPIXEL, BITSPERPIXEL, bitmap);
/* The rgb functions can be used to create nice bitmaps easily for */
/* hicolor/truecolor modes. The 256 color 'emulated' truecolor */
/* looks less impressive. */
for (i = 0; i < 32; i++)
for (j = 0; j < 32; j++) {
int c;
c = 255 - (i + j) * 4;
gl_setpixelrgb(31 - i, 31 - j, c, 0, 0);
gl_setpixelrgb(32 + i, 31 - j, c, c, 0);
gl_setpixelrgb(31 - i, 32 + j, c, 0, c);
gl_setpixelrgb(32 + i, 32 + j, c, c, c);
}
/* Restore previous context. */
gl_setcontext(savedcontext);
gl_clearscreen(0);
for (i = 0; i < 4000; i++) {
int x, y;
x = random() % (WIDTH - 64 + 1);
y = random() % (HEIGHT - 64 + 1);
gl_putbox(x, y, 64, 64, bitmap);
}
free(bitmap);
if (VIRTUAL)
gl_copyscreen(physicalscreen);
}