VOID
NTAPI
LlbVideoDrawChar(IN UCHAR c,
IN PUSHORT Buffer,
IN USHORT Color,
IN USHORT BackColor)
{
PCHAR Pixels;
CHAR Line;
ULONG y, ScreenWidth;
LONG x;
/* Get screen width */
ScreenWidth = LlbHwGetScreenWidth();
Pixels = LlbHwBootFont + c * FONT_HEIGHT;
/* Loop y pixels */
for (y = 0; y < FONT_HEIGHT; y++)
{
/* Loop x pixels */
Line = *Pixels++;
for (x = 7; x >= 0; x--)
{
/* Draw either a character or background pixel */
Buffer[x] = (Line & 1) ? Color : BackColor;
Line >>= 1;
}
/* Next line */
Buffer += ScreenWidth;
}
}
VOID
LlbFwVideoGetDisplaySize(OUT PULONG Width,
OUT PULONG Height,
OUT PULONG Depth)
{
/* Query static settings */
*Width = LlbHwGetScreenWidth() / 8;
*Height = LlbHwGetScreenHeight() / 16;
/* Depth is always 16 bpp */
*Depth = 16;
}
VOID
NTAPI
LlbVideoPutChar(IN UCHAR c)
{
ULONG cx, cy, CharsPerLine, BackColor, ScreenWidth;
/* Backcolor on this machine */
#ifdef BLUE_SCREEN
BackColor = LlbHwVideoCreateColor(14, 0, 82);
#else
BackColor = LlbHwVideoCreateColor(0, 0, 0);
#endif
/* Amount of characters in a line */
ScreenWidth = LlbHwGetScreenWidth();
CharsPerLine = ScreenWidth / 8;
/* Handle new line and scrolling */
if (c == '\n')
{
/* Move a line down */
ScreenCursor += CharsPerLine - (ScreenCursor % CharsPerLine);
/* FIXME: Scrolling */
}
else
{
/* Calculate character position from pixel position */
cy = (ScreenCursor / CharsPerLine) * FONT_HEIGHT;
cx = (ScreenCursor % CharsPerLine) * 8;
/* Draw the character and increment the cursor */
LlbVideoDrawChar(c,
(PUSHORT)LlbHwGetFrameBuffer() + ScreenWidth * cy + cx,
0xFFFF,
BackColor);
ScreenCursor++;
}
}
VOID
NTAPI
LlbVideoClearScreen(IN BOOLEAN OsLoader)
{
ULONG ScreenSize, p;
ULONG BackColor;
PUSHORT VideoBuffer;
/* Get frame buffer and reset cursor position */
VideoBuffer = LlbHwGetFrameBuffer();
ScreenCursor = 0;
/* Backcolor on this machine */
if (OsLoader)
{
/* Black */
BackColor = 0;
}
else
{
/* Deep blue */
#ifdef BLUE_SCREEN
BackColor = LlbHwVideoCreateColor(14, 0, 82);
#else
BackColor = LlbHwVideoCreateColor(0, 0, 0);
#endif
BackColor = (BackColor << 16) | BackColor;
}
/* Screen size on this machine */
ScreenSize = LlbHwGetScreenWidth() * LlbHwGetScreenHeight();
/* Clear the screen with the given color */
for (p = 0; p < ScreenSize * 2; p += 4)
{
*(PULONG)((PCHAR)VideoBuffer + p) = BackColor;
}
}
VOID
LlbFwVideoPutChar(IN INT c,
IN UCHAR Attr,
IN ULONG X,
IN ULONG Y)
{
ULONG Color, BackColor;
PUSHORT Buffer;
/* Convert EGA index to color used by hardware */
Color = LlbHwVideoCreateColor(ColorPalette[Attr & 0xF][0],
ColorPalette[Attr & 0xF][1],
ColorPalette[Attr & 0xF][2]);
BackColor = LlbHwVideoCreateColor(ColorPalette[Attr >> 4][0],
ColorPalette[Attr >> 4][1],
ColorPalette[Attr >> 4][2]);
/* Compute buffer address */
Buffer = (PUSHORT)LlbHwGetFrameBuffer() + (LlbHwGetScreenWidth() * (Y * 16)) + (X * 8);
/* Draw it */
LlbVideoDrawChar(c, Buffer, Color, BackColor);
}
