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conhost: Implement IOCTL_CONDRV_READ_OUTPUT. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2020-08-28 14:27:05 +02:00 committed by Alexandre Julliard
parent 01c05387ce
commit f4661f1b38
1 changed files with 82 additions and 0 deletions
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82
programs/conhost/conhost.c
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@ -545,6 +545,84 @@ static NTSTATUS write_output( struct screen_buffer *screen_buffer, const struct
return STATUS_SUCCESS;
}
static NTSTATUS read_output( struct screen_buffer *screen_buffer, const struct condrv_output_params *params,
size_t *out_size )
{
enum char_info_mode mode;
unsigned int x, y, width;
unsigned int i, count;
x = params->x;
y = params->y;
mode = params->mode;
width = params->width;
TRACE( "(%u %u) mode %u width %u\n", x, y, mode, width );
switch(mode)
{
case CHAR_INFO_MODE_TEXT:
{
WCHAR *data;
char_info_t *src;
if (x >= screen_buffer->width || y >= screen_buffer->height)
{
*out_size = 0;
return STATUS_SUCCESS;
}
src = screen_buffer->data + y * screen_buffer->width + x;
count = min( screen_buffer->data + screen_buffer->height * screen_buffer->width - src,
*out_size / sizeof(*data) );
*out_size = count * sizeof(*data);
if (!(data = alloc_ioctl_buffer( *out_size ))) return STATUS_NO_MEMORY;
for (i = 0; i < count; i++) data[i] = src[i].ch;
}
break;
case CHAR_INFO_MODE_ATTR:
{
unsigned short *data;
char_info_t *src;
if (x >= screen_buffer->width || y >= screen_buffer->height)
{
*out_size = 0;
return STATUS_SUCCESS;
}
src = screen_buffer->data + y * screen_buffer->width + x;
count = min( screen_buffer->data + screen_buffer->height * screen_buffer->width - src,
*out_size / sizeof(*data) );
*out_size = count * sizeof(*data);
if (!(data = alloc_ioctl_buffer( *out_size ))) return STATUS_NO_MEMORY;
for (i = 0; i < count; i++) data[i] = src[i].attr;
}
break;
case CHAR_INFO_MODE_TEXTATTR:
{
SMALL_RECT *region;
char_info_t *data;
if (!width || *out_size < sizeof(*region) || x >= screen_buffer->width || y >= screen_buffer->height)
return STATUS_INVALID_PARAMETER;
count = min( (*out_size - sizeof(*region)) / (width * sizeof(*data)), screen_buffer->height - y );
width = min( width, screen_buffer->width - x );
*out_size = sizeof(*region) + width * count * sizeof(*data);
if (!(region = alloc_ioctl_buffer( *out_size ))) return STATUS_NO_MEMORY;
region->Left = x;
region->Top = y;
region->Right = x + width - 1;
region->Bottom = y + count - 1;
data = (char_info_t *)(region + 1);
for (i = 0; i < count; i++)
{
memcpy( &data[i * width], &screen_buffer->data[(y + i) * screen_buffer->width + x],
width * sizeof(*data) );
}
}
break;
default:
return STATUS_INVALID_PARAMETER;
}
return STATUS_SUCCESS;
}
static NTSTATUS set_console_title( struct console *console, const WCHAR *in_title, size_t size )
{
WCHAR *title = NULL;
@ -599,6 +677,10 @@ static NTSTATUS screen_buffer_ioctl( struct screen_buffer *screen_buffer, unsign
return STATUS_INVALID_PARAMETER;
return write_output( screen_buffer, in_data, in_size, out_size );
case IOCTL_CONDRV_READ_OUTPUT:
if (in_size != sizeof(struct condrv_output_params)) return STATUS_INVALID_PARAMETER;
return read_output( screen_buffer, in_data, out_size );
case IOCTL_CONDRV_GET_OUTPUT_INFO:
if (in_size || *out_size < sizeof(struct condrv_output_info)) return STATUS_INVALID_PARAMETER;
return get_output_info( screen_buffer, out_size );