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List: wine-devel
Subject: [PATCH 2/3] conhost: Implement IOCTL_CONDRV_SCROLL.
From: Jacek Caban <jacek () codeweavers ! com>
Date: 2020-08-31 13:11:00
Message-ID: 99829212-7514-4cad-b795-83b27e151f29 () codeweavers ! com
[Download RAW message or body]
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
---
programs/conhost/conhost.c | 101 +++++++++++++++++++++++++++++++++++++
1 file changed, 101 insertions(+)
["0002-conhost-Implement-IOCTL_CONDRV_SCROLL.txt" (text/x-patch)]
diff --git a/programs/conhost/conhost.c b/programs/conhost/conhost.c
index 80f09e738a7..0050f4d1add 100644
--- a/programs/conhost/conhost.c
+++ b/programs/conhost/conhost.c
@@ -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;
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