static void
SVGA_drawvline(PSD psd,COORD x, COORD y1, COORD y2, PIXELVAL c)
{
if(gr_mode == MODE_SET) {
vga_setegacolor(c);
vga_drawline(x, y1, x, y2);
}
/* slower version required for XOR drawing support*/
while(y1 <= y2)
SVGA_drawpixel(psd, x, y1++, c);
}
static void
SVGA_drawpixel(PSD psd,COORD x, COORD y, PIXELVAL c)
{
unsigned char gline, line;
if(gr_mode == MODE_SET) {
vga_setegacolor(c);
vga_drawpixel(x, y);
return;
}
/*
* This fishery is required because vgalib doesn't support
* xor drawing mode without acceleration.
*/
vga_getscansegment(&gline, x, y, 1);
line = c;
line ^= gline;
vga_drawscansegment(&line, x, y, 1);
}
static void testmode(int mode)
{
int xmax, ymax, i, x, y, yw, ys, c;
vga_modeinfo *modeinfo;
vga_setmode(mode);
modeinfo = vga_getmodeinfo(mode);
printf("Width: %d Height: %d Colors: %d\n",
modeinfo->width,
modeinfo->height,
modeinfo->colors);
printf("DisplayStartRange: %xh Maxpixels: %d Blit: %s\n",
modeinfo->startaddressrange,
modeinfo->maxpixels,
modeinfo->haveblit ? "YES" : "NO");
#ifdef TEST_MODEX
if (modeinfo->colors == 256)
printf("Switching to ModeX ... %s\n",
(vga_setmodeX()? "done" : "failed"));
#endif
vga_screenoff();
xmax = vga_getxdim() - 1;
ymax = vga_getydim() - 1;
vga_setcolor(vga_white());
vga_drawline(0, 0, xmax, 0);
vga_drawline(xmax, 0, xmax, ymax);
vga_drawline(xmax, ymax, 0, ymax);
vga_drawline(0, ymax, 0, 0);
/* Draw crosses */
for (i = 0; i <= 15; i++) {
vga_setegacolor(i);
vga_drawline(10 + i * 5, 10, 89 + i * 5, 89);
}
for (i = 0; i <= 15; i++) {
vga_setegacolor(i);
vga_drawline(89 + i * 5, 10, 10 + i * 5, 89);
}
vga_screenon();
ys = 100;
yw = (ymax - 100) / 4;
switch (vga_getcolors()) {
case 256:
/* Draw horizontal color bands using palette */
for (i = 0; i < 60; ++i) {
c = (i * 64) / 60;
vga_setpalette(i + 16, c, c, c);
vga_setpalette(i + 16 + 60, c, 0, 0);
vga_setpalette(i + 16 + (2 * 60), 0, c, 0);
vga_setpalette(i + 16 + (3 * 60), 0, 0, c);
}
line[0] = line[xmax] = 15;
line[1] = line[xmax - 1] = 0;
for (x = 2; x < xmax - 1; ++x)
line[x] = (((x - 2) * 60) / (xmax - 3)) + 16;
for (y = ys; y < ys + yw; ++y) /* gray */
vga_drawscanline(y, line);
for (x = 2; x < xmax - 1; ++x)
line[x] += 60;
ys += yw;
for (y = ys; y < ys + yw; ++y) /* red */
vga_drawscanline(y, line);
for (x = 2; x < xmax - 1; ++x)
line[x] += 60;
ys += yw;
for (y = ys; y < ys + yw; ++y) /* green */
vga_drawscanline(y, line);
for (x = 2; x < xmax - 1; ++x)
line[x] += 60;
ys += yw;
for (y = ys; y < ys + yw; ++y) /* blue */
vga_drawscanline(y, line);
break;
case 1 << 15:
case 1 << 16:
case 1 << 24:
/* Draw horizontal color bands in RGB */
for (x = 2; x < xmax - 1; ++x) {
c = ((x - 2) * 255) / (xmax - 4);
y = ys;
vga_setrgbcolor(c, c, c);
vga_drawline(x, y, x, y + yw - 1);
y += yw;
vga_setrgbcolor(c, 0, 0);
vga_drawline(x, y, x, y + yw - 1);
y += yw;
vga_setrgbcolor(0, c, 0);
vga_drawline(x, y, x, y + yw - 1);
y += yw;
vga_setrgbcolor(0, 0, c);
vga_drawline(x, y, x, y + yw - 1);
}
drawSquares(xmax, ymax);
break;
default:
/* Draw vertical color bars */
if (vga_getcolors() == 16) {
for (i = 0; i < xmax - 1; i++)
line[i] = (i + 2) % 16;
line[0] = line[xmax] = 15;
line[1] = line[xmax - 1] = 0;
}
if (vga_getcolors() == 2) {
for (i = 0; i <= xmax; i++)
line[i] = 0x11;
line[0] = 0x91;
}
for (i = 100; i < ymax - 1; i++)
vga_drawscanline(i, line);
break;
}
if (getchar() == 'd')
vga_dumpregs();
}
