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conhost: Implement IOCTL_CONDRV_SCROLL. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2020-08-31 15:11:00 +02:00 committed by Alexandre Julliard
parent 2dbf14ee80
commit af47236499
1 changed files with 101 additions and 0 deletions
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101
programs/conhost/conhost.c
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@ -673,6 +673,102 @@ static NTSTATUS fill_output( struct screen_buffer *screen_buffer, const struct c
return STATUS_SUCCESS;
}
static NTSTATUS scroll_output( struct screen_buffer *screen_buffer, const struct condrv_scroll_params *params )
{
int x, y, xsrc, ysrc, w, h;
char_info_t *psrc, *pdst;
SMALL_RECT src, dst;
SMALL_RECT clip;
xsrc = params->scroll.Left;
ysrc = params->scroll.Top;
w = params->scroll.Right - params->scroll.Left + 1;
h = params->scroll.Bottom - params->scroll.Top + 1;
TRACE( "(%d %d) -> (%u %u) w %u h %u\n", xsrc, ysrc, params->origin.X, params->origin.Y, w, h );
clip.Left = max( params->clip.Left, 0 );
clip.Top = max( params->clip.Top, 0 );
clip.Right = min( params->clip.Right, screen_buffer->width - 1 );
clip.Bottom = min( params->clip.Bottom, screen_buffer->height - 1 );
if (clip.Left > clip.Right || clip.Top > clip.Bottom || params->scroll.Left < 0 || params->scroll.Top < 0 ||
params->scroll.Right >= screen_buffer->width || params->scroll.Bottom >= screen_buffer->height ||
params->scroll.Right < params->scroll.Left || params->scroll.Top > params->scroll.Bottom ||
params->origin.X < 0 || params->origin.X >= screen_buffer->width || params->origin.Y < 0 ||
params->origin.Y >= screen_buffer->height)
return STATUS_INVALID_PARAMETER;
src.Left = max( xsrc, clip.Left );
src.Top = max( ysrc, clip.Top );
src.Right = min( xsrc + w - 1, clip.Right );
src.Bottom = min( ysrc + h - 1, clip.Bottom );
dst.Left = params->origin.X;
dst.Top = params->origin.Y;
dst.Right = params->origin.X + w - 1;
dst.Bottom = params->origin.Y + h - 1;
if (dst.Left < clip.Left)
{
xsrc += clip.Left - dst.Left;
w -= clip.Left - dst.Left;
dst.Left = clip.Left;
}
if (dst.Top < clip.Top)
{
ysrc += clip.Top - dst.Top;
h -= clip.Top - dst.Top;
dst.Top = clip.Top;
}
if (dst.Right > clip.Right) w -= dst.Right - clip.Right;
if (dst.Bottom > clip.Bottom) h -= dst.Bottom - clip.Bottom;
if (w > 0 && h > 0)
{
if (ysrc < dst.Top)
{
psrc = &screen_buffer->data[(ysrc + h - 1) * screen_buffer->width + xsrc];
pdst = &screen_buffer->data[(dst.Top + h - 1) * screen_buffer->width + dst.Left];
for (y = h; y > 0; y--)
{
memcpy( pdst, psrc, w * sizeof(*pdst) );
pdst -= screen_buffer->width;
psrc -= screen_buffer->width;
}
}
else
{
psrc = &screen_buffer->data[ysrc * screen_buffer->width + xsrc];
pdst = &screen_buffer->data[dst.Top * screen_buffer->width + dst.Left];
for (y = 0; y < h; y++)
{
/* we use memmove here because when psrc and pdst are the same,
* copies are done on the same row, so the dst and src blocks
* can overlap */
memmove( pdst, psrc, w * sizeof(*pdst) );
pdst += screen_buffer->width;
psrc += screen_buffer->width;
}
}
}
for (y = src.Top; y <= src.Bottom; y++)
{
int left = src.Left;
int right = src.Right;
if (dst.Top <= y && y <= dst.Bottom)
{
if (dst.Left <= src.Left) left = max( left, dst.Right + 1 );
if (dst.Left >= src.Left) right = min( right, dst.Left - 1 );
}
for (x = left; x <= right; x++) screen_buffer->data[y * screen_buffer->width + x] = params->fill;
}
return STATUS_SUCCESS;
}
static NTSTATUS set_console_title( struct console *console, const WCHAR *in_title, size_t size )
{
WCHAR *title = NULL;
@ -744,6 +840,11 @@ static NTSTATUS screen_buffer_ioctl( struct screen_buffer *screen_buffer, unsign
return STATUS_INVALID_PARAMETER;
return fill_output( screen_buffer, in_data );
case IOCTL_CONDRV_SCROLL:
if (in_size != sizeof(struct condrv_scroll_params) || *out_size)
return STATUS_INVALID_PARAMETER;
return scroll_output( screen_buffer, in_data );
default:
FIXME( "unsupported ioctl %x\n", code );
return STATUS_NOT_SUPPORTED;