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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Display Update Virtual Channel Extension.
Copyright 2017 Henrik Andersson <hean01@cendio.com> for Cendio AB
Copyright 2017 Karl Mikaelsson <derfian@cendio.se> for Cendio AB
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "rdesktop.h"
#define DISPLAYCONTROL_PDU_TYPE_CAPS 0x5
#define DISPLAYCONTROL_PDU_TYPE_MONITOR_LAYOUT 0x2
#define DISPLAYCONTROL_MONITOR_PRIMARY 0x1
#define RDPEDISP_CHANNEL_NAME "Microsoft::Windows::RDS::DisplayControl"
extern int g_dpi;
extern RD_BOOL g_pending_resize_defer;
extern struct timeval g_pending_resize_defer_timer;
static void rdpedisp_send(STREAM s);
static void rdpedisp_init_packet(STREAM s, uint32 type, uint32 length);
static void
rdpedisp_process_caps_pdu(STREAM s)
{
uint32 tmp[3];
in_uint32_le(s, tmp[0]); /* MaxNumMonitors */
in_uint32_le(s, tmp[1]); /* MaxMonitorAreaFactorA */
in_uint32_le(s, tmp[2]); /* MaxMonitorAreaFactorB */
logger(Protocol, Debug,
"rdpedisp_process_caps_pdu(), Max supported monitor area (square pixels) is %d",
tmp[0] * tmp[1] * tmp[2]);
/* When the RDPEDISP channel is established, we allow dynamic
session resize straight away by clearing the defer flag and
the defer timer. This lets process_pending_resize() start
processing pending resizes immediately. We expect that
process_pending_resize will prefer RDPEDISP resizes over
disconnect/reconnect resizes. */
g_pending_resize_defer = False;
g_pending_resize_defer_timer.tv_sec = 0;
g_pending_resize_defer_timer.tv_usec = 0;
}
static void
rdpedisp_process_pdu(STREAM s)
{
uint32 type;
/* Read DISPLAYCONTROL_HEADER */
in_uint32_le(s, type); /* type */
in_uint8s(s, 4); /* length */
logger(Protocol, Debug, "rdpedisp_process_pdu(), Got PDU type %d", type);
switch (type)
{
case DISPLAYCONTROL_PDU_TYPE_CAPS:
rdpedisp_process_caps_pdu(s);
break;
default:
logger(Protocol, Warning, "rdpedisp_process_pdu(), Unhandled PDU type %d",
type);
break;
}
}
static void
rdpedisp_send_monitor_layout_pdu(uint32 width, uint32 height)
{
struct stream s;
uint32 physwidth, physheight, desktopscale, devicescale;
memset(&s, 0, sizeof(s));
logger(Protocol, Debug, "rdpedisp_send_monitor_layout_pdu(), width = %d, height = %d",
width, height);
rdpedisp_init_packet(&s, DISPLAYCONTROL_PDU_TYPE_MONITOR_LAYOUT, 16 + 1 * 40);
out_uint32_le(&s, 40); /* MonitorLayoutSize - spec mandates 40 */
out_uint32_le(&s, 1); /* NumMonitors */
out_uint32_le(&s, DISPLAYCONTROL_MONITOR_PRIMARY); /* flags */
out_uint32_le(&s, 0); /* left */
out_uint32_le(&s, 0); /* top */
out_uint32_le(&s, width); /* width */
out_uint32_le(&s, height); /* height */
utils_calculate_dpi_scale_factors(width, height, g_dpi,
&physwidth, &physheight, &desktopscale, &devicescale);
out_uint32_le(&s, physwidth); /* physicalwidth */
out_uint32_le(&s, physheight); /* physicalheight */
out_uint32_le(&s, ORIENTATION_LANDSCAPE); /* Orientation */
out_uint32_le(&s, desktopscale); /* DesktopScaleFactor */
out_uint32_le(&s, devicescale); /* DeviceScaleFactor */
s_mark_end(&s);
rdpedisp_send(&s);
}
static void
rdpedisp_init_packet(STREAM s, uint32 type, uint32 length)
{
s_realloc(s, length);
s_reset(s);
out_uint32_le(s, type);
out_uint32_le(s, length);
}
static void
rdpedisp_send(STREAM s)
{
dvc_send(RDPEDISP_CHANNEL_NAME, s);
}
RD_BOOL
rdpedisp_is_available()
{
return dvc_channels_is_available(RDPEDISP_CHANNEL_NAME);
}
void
rdpedisp_set_session_size(uint32 width, uint32 height)
{
if (rdpedisp_is_available() == False)
return;
/* monitor width MUST be even number */
utils_apply_session_size_limitations(&width, &height);
rdpedisp_send_monitor_layout_pdu(width, height);
}
void
rdpedisp_init(void)
{
dvc_channels_register(RDPEDISP_CHANNEL_NAME, rdpedisp_process_pdu);
}
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