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Add scrolling support for VGA text mode.

This commit is contained in:
Jukka Heinonen 2003-05-07 03:16:34 +00:00 committed by Alexandre Julliard
parent 54f59e5005
commit fb3080a2f3
1 changed files with 59 additions and 11 deletions
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58
dlls/winedos/vga.c
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@ -781,9 +781,19 @@ void VGA_PutChar(BYTE ascii)
vga_text_x++;
}
/*
* FIXME: add line wrapping and scrolling
*/
if (vga_text_x >= vga_text_width)
{
vga_text_x = 0;
vga_text_y++;
}
if (vga_text_y >= vga_text_height)
{
vga_text_y = vga_text_height - 1;
VGA_ScrollUpText( 0, 0,
vga_text_height - 1, vga_text_width - 1,
1, vga_text_attr );
}
/*
* If we don't have a console, write directly to standard output.
@ -818,14 +828,52 @@ void VGA_ScrollUpText(unsigned row1, unsigned col1,
unsigned row2, unsigned col2,
unsigned lines, BYTE attr)
{
FIXME("not implemented\n");
char *buffer = VGA_AlphaBuffer();
unsigned y;
EnterCriticalSection(&vga_lock);
/*
* Scroll buffer.
*/
for (y = row1; y <= row2 - lines; y++)
memmove( buffer + col1 + y * vga_text_width * 2,
buffer + col1 + (y + lines) * vga_text_width * 2,
(col2 - col1 + 1) * 2 );
/*
* Fill exposed lines.
*/
for (y = max(row1, row2 - lines + 1); y <= row2; y++)
VGA_WriteChars( col1, y, ' ', attr, col2 - col1 + 1 );
LeaveCriticalSection(&vga_lock);
}
void VGA_ScrollDownText(unsigned row1, unsigned col1,
unsigned row2, unsigned col2,
unsigned lines, BYTE attr)
{
FIXME("not implemented\n");
char *buffer = VGA_AlphaBuffer();
unsigned y;
EnterCriticalSection(&vga_lock);
/*
* Scroll buffer.
*/
for (y = row2; y >= row1 + lines; y--)
memmove( buffer + col1 + y * vga_text_width * 2,
buffer + col1 + (y - lines) * vga_text_width * 2,
(col2 - col1 + 1) * 2 );
/*
* Fill exposed lines.
*/
for (y = row1; y <= min(row1 + lines - 1, row2); y++)
VGA_WriteChars( col1, y, ' ', attr, col2 - col1 + 1 );
LeaveCriticalSection(&vga_lock);
}
void VGA_GetCharacterAtCursor(BYTE *ascii, BYTE *attr)