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();
}
int vga_clear(void)
{
vga_screenoff();
#ifdef BACKGROUND
__svgalib_dont_switch_vt_yet();
#endif
if (MODEX)
goto modeX;
switch (CM) {
case G320x200x256:
case G320x240x256:
case G320x400x256:
case G360x480x256:
modeX:
#ifdef BACKGROUND
if (vga_oktowrite())
{
#endif
/* write to all planes */
port_out(0x02, SEQ_I);
port_out(0x0F, SEQ_D);
/* clear video memory */
memset(GM, 0, 65536);
#ifdef BACKGROUND
}
else
{
int i;
for (i = 0; i < 4; i++) {
/* save plane i */
__svgalib_fast_setpage(i);
memset(GM, 0, GRAPH_SIZE);
}
}
#endif
break;
default:
switch (CI.colors) {
case 2:
case 16:
vga_setcolor(0);
#ifdef BACKGROUND
if (vga_oktowrite())
{
#endif
/* write to all bits */
port_out(0x08, GRA_I);
port_out(0xFF, GRA_D);
#ifdef BACKGROUND
}
#endif
default:
{
int i;
int pages = (CI.ydim * CI.xbytes + 65535) >> 16;
#if defined(CONFIG_ALPHA_JENSEN)
int j;
#endif
#ifdef BACKGROUND
if (!vga_oktowrite())
{
switch (CI.colors) {
case 2:
case 16:
pages*=4;
}
}
#endif
for (i = 0; i < pages; ++i) {
vga_setpage(i);
#if defined(CONFIG_ALPHA_JENSEN)
for (j = 0; j < 65536; j += 2)
gr_writew(0, j);
#else
/* clear video memory */
memset(GM, 0, 65536);
#endif
}
}
break;
}
break;
}
vga_setcolor(15);
#ifdef BACKGROUND
__svgalib_is_vt_switching_needed();
#endif
vga_screenon();
return 0;
}