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FreeRDP/channels/rdpei/client/rdpei_main.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Input Virtual Channel Extension
*
* Copyright 2013 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* Copyright 2015 Thincast Technologies GmbH
* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <freerdp/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <winpr/crt.h>
#include <winpr/synch.h>
#include <winpr/thread.h>
#include <winpr/stream.h>
#include <winpr/sysinfo.h>
#include <winpr/cmdline.h>
#include <winpr/collections.h>
#include <freerdp/addin.h>
#include <freerdp/freerdp.h>
#include <freerdp/client/channels.h>
#include "rdpei_common.h"
#include "rdpei_main.h"
#define RDPEI_TAG CHANNELS_TAG("rdpei.client")
/**
* Touch Input
* http://msdn.microsoft.com/en-us/library/windows/desktop/dd562197/
*
* Windows Touch Input
* http://msdn.microsoft.com/en-us/library/windows/desktop/dd317321/
*
* Input: Touch injection sample
* http://code.msdn.microsoft.com/windowsdesktop/Touch-Injection-Sample-444d9bf7
*
* Pointer Input Message Reference
* http://msdn.microsoft.com/en-us/library/hh454916/
*
* POINTER_INFO Structure
* http://msdn.microsoft.com/en-us/library/hh454907/
*
* POINTER_TOUCH_INFO Structure
* http://msdn.microsoft.com/en-us/library/hh454910/
*/
#define MAX_CONTACTS 64
#define MAX_PEN_CONTACTS 4
typedef struct
{
GENERIC_DYNVC_PLUGIN base;
RdpeiClientContext* context;
UINT32 version;
UINT32 features; /* SC_READY_MULTIPEN_INJECTION_SUPPORTED */
UINT16 maxTouchContacts;
UINT64 currentFrameTime;
UINT64 previousFrameTime;
RDPINPUT_CONTACT_POINT contactPoints[MAX_CONTACTS];
UINT64 currentPenFrameTime;
UINT64 previousPenFrameTime;
UINT16 maxPenContacts;
RDPINPUT_PEN_CONTACT_POINT penContactPoints[MAX_PEN_CONTACTS];
CRITICAL_SECTION lock;
rdpContext* rdpcontext;
HANDLE thread;
HANDLE event;
UINT64 lastPollEventTime;
BOOL running;
BOOL async;
} RDPEI_PLUGIN;
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_send_frame(RdpeiClientContext* context, RDPINPUT_TOUCH_FRAME* frame);
#ifdef WITH_DEBUG_RDPEI
static const char* rdpei_eventid_string(UINT16 event)
{
switch (event)
{
case EVENTID_SC_READY:
return "EVENTID_SC_READY";
case EVENTID_CS_READY:
return "EVENTID_CS_READY";
case EVENTID_TOUCH:
return "EVENTID_TOUCH";
case EVENTID_SUSPEND_TOUCH:
return "EVENTID_SUSPEND_TOUCH";
case EVENTID_RESUME_TOUCH:
return "EVENTID_RESUME_TOUCH";
case EVENTID_DISMISS_HOVERING_CONTACT:
return "EVENTID_DISMISS_HOVERING_CONTACT";
case EVENTID_PEN:
return "EVENTID_PEN";
default:
return "EVENTID_UNKNOWN";
}
}
#endif
static RDPINPUT_CONTACT_POINT* rdpei_contact(RDPEI_PLUGIN* rdpei, INT32 externalId, BOOL active)
{
for (UINT16 i = 0; i < rdpei->maxTouchContacts; i++)
{
RDPINPUT_CONTACT_POINT* contactPoint = &rdpei->contactPoints[i];
if (!contactPoint->active && active)
continue;
else if (!contactPoint->active && !active)
{
contactPoint->contactId = i;
contactPoint->externalId = externalId;
contactPoint->active = TRUE;
return contactPoint;
}
else if (contactPoint->externalId == externalId)
{
return contactPoint;
}
}
return NULL;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_add_frame(RdpeiClientContext* context)
{
RDPEI_PLUGIN* rdpei = NULL;
RDPINPUT_TOUCH_FRAME frame = { 0 };
RDPINPUT_CONTACT_DATA contacts[MAX_CONTACTS] = { 0 };
if (!context || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
frame.contacts = contacts;
for (UINT16 i = 0; i < rdpei->maxTouchContacts; i++)
{
RDPINPUT_CONTACT_POINT* contactPoint = &rdpei->contactPoints[i];
RDPINPUT_CONTACT_DATA* contact = &contactPoint->data;
if (contactPoint->dirty)
{
contacts[frame.contactCount] = *contact;
rdpei->contactPoints[i].dirty = FALSE;
frame.contactCount++;
}
else if (contactPoint->active)
{
if (contact->contactFlags & RDPINPUT_CONTACT_FLAG_DOWN)
{
contact->contactFlags = RDPINPUT_CONTACT_FLAG_UPDATE;
contact->contactFlags |= RDPINPUT_CONTACT_FLAG_INRANGE;
contact->contactFlags |= RDPINPUT_CONTACT_FLAG_INCONTACT;
}
contacts[frame.contactCount] = *contact;
frame.contactCount++;
}
if (contact->contactFlags & RDPINPUT_CONTACT_FLAG_UP)
{
contactPoint->active = FALSE;
contactPoint->externalId = 0;
contactPoint->contactId = 0;
}
}
if (frame.contactCount > 0)
{
UINT error = rdpei_send_frame(context, &frame);
if (error != CHANNEL_RC_OK)
{
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei_send_frame failed with error %" PRIu32 "!", error);
return error;
}
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_send_pdu(GENERIC_CHANNEL_CALLBACK* callback, wStream* s, UINT16 eventId,
size_t pduLength)
{
UINT status = 0;
if (!callback || !s || !callback->channel || !callback->channel->Write)
return ERROR_INTERNAL_ERROR;
if (pduLength > UINT32_MAX)
return ERROR_INVALID_PARAMETER;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)callback->plugin;
if (!rdpei)
return ERROR_INTERNAL_ERROR;
Stream_SetPosition(s, 0);
Stream_Write_UINT16(s, eventId); /* eventId (2 bytes) */
Stream_Write_UINT32(s, (UINT32)pduLength); /* pduLength (4 bytes) */
Stream_SetPosition(s, Stream_Length(s));
status = callback->channel->Write(callback->channel, (UINT32)Stream_Length(s), Stream_Buffer(s),
NULL);
#ifdef WITH_DEBUG_RDPEI
WLog_Print(rdpei->base.log, WLOG_DEBUG,
"rdpei_send_pdu: eventId: %" PRIu16 " (%s) length: %" PRIu32 " status: %" PRIu32 "",
eventId, rdpei_eventid_string(eventId), pduLength, status);
#endif
return status;
}
static UINT rdpei_write_pen_frame(wStream* s, const RDPINPUT_PEN_FRAME* frame)
{
if (!s || !frame)
return ERROR_INTERNAL_ERROR;
if (!rdpei_write_2byte_unsigned(s, frame->contactCount))
return ERROR_OUTOFMEMORY;
if (!rdpei_write_8byte_unsigned(s, frame->frameOffset))
return ERROR_OUTOFMEMORY;
for (UINT16 x = 0; x < frame->contactCount; x++)
{
const RDPINPUT_PEN_CONTACT* contact = &frame->contacts[x];
if (!Stream_EnsureRemainingCapacity(s, 1))
return ERROR_OUTOFMEMORY;
Stream_Write_UINT8(s, contact->deviceId);
if (!rdpei_write_2byte_unsigned(s, contact->fieldsPresent))
return ERROR_OUTOFMEMORY;
if (!rdpei_write_4byte_signed(s, contact->x))
return ERROR_OUTOFMEMORY;
if (!rdpei_write_4byte_signed(s, contact->y))
return ERROR_OUTOFMEMORY;
if (!rdpei_write_4byte_unsigned(s, contact->contactFlags))
return ERROR_OUTOFMEMORY;
if (contact->fieldsPresent & RDPINPUT_PEN_CONTACT_PENFLAGS_PRESENT)
{
if (!rdpei_write_4byte_unsigned(s, contact->penFlags))
return ERROR_OUTOFMEMORY;
}
if (contact->fieldsPresent & RDPINPUT_PEN_CONTACT_PRESSURE_PRESENT)
{
if (!rdpei_write_4byte_unsigned(s, contact->pressure))
return ERROR_OUTOFMEMORY;
}
if (contact->fieldsPresent & RDPINPUT_PEN_CONTACT_ROTATION_PRESENT)
{
if (!rdpei_write_2byte_unsigned(s, contact->rotation))
return ERROR_OUTOFMEMORY;
}
if (contact->fieldsPresent & RDPINPUT_PEN_CONTACT_TILTX_PRESENT)
{
if (!rdpei_write_2byte_signed(s, contact->tiltX))
return ERROR_OUTOFMEMORY;
}
if (contact->fieldsPresent & RDPINPUT_PEN_CONTACT_TILTY_PRESENT)
{
if (!rdpei_write_2byte_signed(s, contact->tiltY))
return ERROR_OUTOFMEMORY;
}
}
return CHANNEL_RC_OK;
}
static UINT rdpei_send_pen_event_pdu(GENERIC_CHANNEL_CALLBACK* callback, size_t frameOffset,
const RDPINPUT_PEN_FRAME* frames, size_t count)
{
UINT status = 0;
wStream* s = NULL;
WINPR_ASSERT(callback);
if (frameOffset > UINT32_MAX)
return ERROR_INVALID_PARAMETER;
if (count > UINT16_MAX)
return ERROR_INVALID_PARAMETER;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)callback->plugin;
if (!rdpei)
return ERROR_INTERNAL_ERROR;
if (!frames || (count == 0))
return ERROR_INTERNAL_ERROR;
s = Stream_New(NULL, 64);
if (!s)
{
WLog_Print(rdpei->base.log, WLOG_ERROR, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Seek(s, RDPINPUT_HEADER_LENGTH);
/**
* the time that has elapsed (in milliseconds) from when the oldest touch frame
* was generated to when it was encoded for transmission by the client.
*/
rdpei_write_4byte_unsigned(s,
(UINT32)frameOffset); /* encodeTime (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_2byte_unsigned(s, (UINT16)count); /* (frameCount) TWO_BYTE_UNSIGNED_INTEGER */
for (size_t x = 0; x < count; x++)
{
if ((status = rdpei_write_pen_frame(s, &frames[x])))
{
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei_write_pen_frame failed with error %" PRIu32 "!", status);
Stream_Free(s, TRUE);
return status;
}
}
Stream_SealLength(s);
status = rdpei_send_pdu(callback, s, EVENTID_PEN, Stream_Length(s));
Stream_Free(s, TRUE);
return status;
}
static UINT rdpei_send_pen_frame(RdpeiClientContext* context, RDPINPUT_PEN_FRAME* frame)
{
const UINT64 currentTime = GetTickCount64();
RDPEI_PLUGIN* rdpei = NULL;
GENERIC_CHANNEL_CALLBACK* callback = NULL;
UINT error = 0;
if (!context)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
if (!rdpei || !rdpei->base.listener_callback)
return ERROR_INTERNAL_ERROR;
if (!rdpei || !rdpei->rdpcontext)
return ERROR_INTERNAL_ERROR;
if (freerdp_settings_get_bool(rdpei->rdpcontext->settings, FreeRDP_SuspendInput))
return CHANNEL_RC_OK;
callback = rdpei->base.listener_callback->channel_callback;
/* Just ignore the event if the channel is not connected */
if (!callback)
return CHANNEL_RC_OK;
if (!rdpei->previousPenFrameTime && !rdpei->currentPenFrameTime)
{
rdpei->currentPenFrameTime = currentTime;
frame->frameOffset = 0;
}
else
{
rdpei->currentPenFrameTime = currentTime;
frame->frameOffset = rdpei->currentPenFrameTime - rdpei->previousPenFrameTime;
}
if ((error = rdpei_send_pen_event_pdu(callback, frame->frameOffset, frame, 1)))
return error;
rdpei->previousPenFrameTime = rdpei->currentPenFrameTime;
return error;
}
static UINT rdpei_add_pen_frame(RdpeiClientContext* context)
{
RDPEI_PLUGIN* rdpei = NULL;
RDPINPUT_PEN_FRAME penFrame = { 0 };
RDPINPUT_PEN_CONTACT penContacts[MAX_PEN_CONTACTS] = { 0 };
if (!context || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
penFrame.contacts = penContacts;
for (UINT16 i = 0; i < rdpei->maxPenContacts; i++)
{
RDPINPUT_PEN_CONTACT_POINT* contact = &(rdpei->penContactPoints[i]);
if (contact->dirty)
{
penContacts[penFrame.contactCount++] = contact->data;
contact->dirty = FALSE;
}
else if (contact->active)
{
if (contact->data.contactFlags & RDPINPUT_CONTACT_FLAG_DOWN)
{
contact->data.contactFlags = RDPINPUT_CONTACT_FLAG_UPDATE;
contact->data.contactFlags |= RDPINPUT_CONTACT_FLAG_INRANGE;
contact->data.contactFlags |= RDPINPUT_CONTACT_FLAG_INCONTACT;
}
penContacts[penFrame.contactCount++] = contact->data;
}
if (contact->data.contactFlags & RDPINPUT_CONTACT_FLAG_CANCELED)
{
contact->externalId = 0;
contact->active = FALSE;
}
}
if (penFrame.contactCount > 0)
return rdpei_send_pen_frame(context, &penFrame);
return CHANNEL_RC_OK;
}
static UINT rdpei_update(wLog* log, RdpeiClientContext* context)
{
UINT error = rdpei_add_frame(context);
if (error != CHANNEL_RC_OK)
{
WLog_Print(log, WLOG_ERROR, "rdpei_add_frame failed with error %" PRIu32 "!", error);
return error;
}
return rdpei_add_pen_frame(context);
}
static BOOL rdpei_poll_run_unlocked(rdpContext* context, void* userdata)
{
RDPEI_PLUGIN* rdpei = userdata;
WINPR_ASSERT(rdpei);
WINPR_ASSERT(context);
const UINT64 now = GetTickCount64();
/* Send an event every ~20ms */
if ((now < rdpei->lastPollEventTime) || (now - rdpei->lastPollEventTime < 20ULL))
return TRUE;
rdpei->lastPollEventTime = now;
const UINT error = rdpei_update(rdpei->base.log, rdpei->context);
(void)ResetEvent(rdpei->event);
if (error != CHANNEL_RC_OK)
{
WLog_Print(rdpei->base.log, WLOG_ERROR, "rdpei_add_frame failed with error %" PRIu32 "!",
error);
setChannelError(context, error, "rdpei_add_frame reported an error");
return FALSE;
}
return TRUE;
}
static BOOL rdpei_poll_run(rdpContext* context, void* userdata)
{
RDPEI_PLUGIN* rdpei = userdata;
WINPR_ASSERT(rdpei);
EnterCriticalSection(&rdpei->lock);
BOOL rc = rdpei_poll_run_unlocked(context, userdata);
LeaveCriticalSection(&rdpei->lock);
return rc;
}
static DWORD WINAPI rdpei_periodic_update(LPVOID arg)
{
DWORD status = 0;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)arg;
UINT error = CHANNEL_RC_OK;
RdpeiClientContext* context = NULL;
if (!rdpei)
{
error = ERROR_INVALID_PARAMETER;
goto out;
}
context = rdpei->context;
if (!context)
{
error = ERROR_INVALID_PARAMETER;
goto out;
}
while (rdpei->running)
{
status = WaitForSingleObject(rdpei->event, 20);
if (status == WAIT_FAILED)
{
error = GetLastError();
WLog_Print(rdpei->base.log, WLOG_ERROR,
"WaitForMultipleObjects failed with error %" PRIu32 "!", error);
break;
}
error = rdpei_poll_run(rdpei->rdpcontext, rdpei);
}
out:
if (error && rdpei && rdpei->rdpcontext)
setChannelError(rdpei->rdpcontext, error, "rdpei_schedule_thread reported an error");
if (rdpei)
rdpei->running = FALSE;
ExitThread(error);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_send_cs_ready_pdu(GENERIC_CHANNEL_CALLBACK* callback)
{
UINT status = 0;
wStream* s = NULL;
UINT32 flags = 0;
UINT32 pduLength = 0;
RDPEI_PLUGIN* rdpei = NULL;
if (!callback || !callback->plugin)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)callback->plugin;
flags |= CS_READY_FLAGS_SHOW_TOUCH_VISUALS & rdpei->context->clientFeaturesMask;
if (rdpei->version > RDPINPUT_PROTOCOL_V10)
flags |= CS_READY_FLAGS_DISABLE_TIMESTAMP_INJECTION & rdpei->context->clientFeaturesMask;
if (rdpei->features & SC_READY_MULTIPEN_INJECTION_SUPPORTED)
flags |= CS_READY_FLAGS_ENABLE_MULTIPEN_INJECTION & rdpei->context->clientFeaturesMask;
pduLength = RDPINPUT_HEADER_LENGTH + 10;
s = Stream_New(NULL, pduLength);
if (!s)
{
WLog_Print(rdpei->base.log, WLOG_ERROR, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Seek(s, RDPINPUT_HEADER_LENGTH);
Stream_Write_UINT32(s, flags); /* flags (4 bytes) */
Stream_Write_UINT32(s, rdpei->version); /* protocolVersion (4 bytes) */
Stream_Write_UINT16(s, rdpei->maxTouchContacts); /* maxTouchContacts (2 bytes) */
Stream_SealLength(s);
status = rdpei_send_pdu(callback, s, EVENTID_CS_READY, pduLength);
Stream_Free(s, TRUE);
return status;
}
#if defined(WITH_DEBUG_RDPEI)
static void rdpei_print_contact_flags(wLog* log, UINT32 contactFlags)
{
if (contactFlags & RDPINPUT_CONTACT_FLAG_DOWN)
WLog_Print(log, WLOG_DEBUG, " RDPINPUT_CONTACT_FLAG_DOWN");
if (contactFlags & RDPINPUT_CONTACT_FLAG_UPDATE)
WLog_Print(log, WLOG_DEBUG, " RDPINPUT_CONTACT_FLAG_UPDATE");
if (contactFlags & RDPINPUT_CONTACT_FLAG_UP)
WLog_Print(log, WLOG_DEBUG, " RDPINPUT_CONTACT_FLAG_UP");
if (contactFlags & RDPINPUT_CONTACT_FLAG_INRANGE)
WLog_Print(log, WLOG_DEBUG, " RDPINPUT_CONTACT_FLAG_INRANGE");
if (contactFlags & RDPINPUT_CONTACT_FLAG_INCONTACT)
WLog_Print(log, WLOG_DEBUG, " RDPINPUT_CONTACT_FLAG_INCONTACT");
if (contactFlags & RDPINPUT_CONTACT_FLAG_CANCELED)
WLog_Print(log, WLOG_DEBUG, " RDPINPUT_CONTACT_FLAG_CANCELED");
}
#endif
static INT16 bounded(INT32 val)
{
if (val < INT16_MIN)
return INT16_MIN;
if (val > INT16_MAX)
return INT16_MAX;
return (INT16)val;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_write_touch_frame(wLog* log, wStream* s, RDPINPUT_TOUCH_FRAME* frame)
{
int rectSize = 2;
RDPINPUT_CONTACT_DATA* contact = NULL;
if (!s || !frame)
return ERROR_INTERNAL_ERROR;
#ifdef WITH_DEBUG_RDPEI
WLog_Print(log, WLOG_DEBUG, "contactCount: %" PRIu32 "", frame->contactCount);
WLog_Print(log, WLOG_DEBUG, "frameOffset: 0x%016" PRIX64 "", frame->frameOffset);
#endif
rdpei_write_2byte_unsigned(s,
frame->contactCount); /* contactCount (TWO_BYTE_UNSIGNED_INTEGER) */
/**
* the time offset from the previous frame (in microseconds).
* If this is the first frame being transmitted then this field MUST be set to zero.
*/
rdpei_write_8byte_unsigned(s, frame->frameOffset *
1000); /* frameOffset (EIGHT_BYTE_UNSIGNED_INTEGER) */
if (!Stream_EnsureRemainingCapacity(s, (size_t)frame->contactCount * 64))
{
WLog_Print(log, WLOG_ERROR, "Stream_EnsureRemainingCapacity failed!");
return CHANNEL_RC_NO_MEMORY;
}
for (UINT32 index = 0; index < frame->contactCount; index++)
{
contact = &frame->contacts[index];
contact->fieldsPresent |= CONTACT_DATA_CONTACTRECT_PRESENT;
contact->contactRectLeft = bounded(contact->x - rectSize);
contact->contactRectTop = bounded(contact->y - rectSize);
contact->contactRectRight = bounded(contact->x + rectSize);
contact->contactRectBottom = bounded(contact->y + rectSize);
#ifdef WITH_DEBUG_RDPEI
WLog_Print(log, WLOG_DEBUG, "contact[%" PRIu32 "].contactId: %" PRIu32 "", index,
contact->contactId);
WLog_Print(log, WLOG_DEBUG, "contact[%" PRIu32 "].fieldsPresent: %" PRIu32 "", index,
contact->fieldsPresent);
WLog_Print(log, WLOG_DEBUG, "contact[%" PRIu32 "].x: %" PRId32 "", index, contact->x);
WLog_Print(log, WLOG_DEBUG, "contact[%" PRIu32 "].y: %" PRId32 "", index, contact->y);
WLog_Print(log, WLOG_DEBUG, "contact[%" PRIu32 "].contactFlags: 0x%08" PRIX32 "", index,
contact->contactFlags);
rdpei_print_contact_flags(log, contact->contactFlags);
#endif
Stream_Write_UINT8(s, contact->contactId); /* contactId (1 byte) */
/* fieldsPresent (TWO_BYTE_UNSIGNED_INTEGER) */
rdpei_write_2byte_unsigned(s, contact->fieldsPresent);
rdpei_write_4byte_signed(s, contact->x); /* x (FOUR_BYTE_SIGNED_INTEGER) */
rdpei_write_4byte_signed(s, contact->y); /* y (FOUR_BYTE_SIGNED_INTEGER) */
/* contactFlags (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_4byte_unsigned(s, contact->contactFlags);
if (contact->fieldsPresent & CONTACT_DATA_CONTACTRECT_PRESENT)
{
/* contactRectLeft (TWO_BYTE_SIGNED_INTEGER) */
rdpei_write_2byte_signed(s, contact->contactRectLeft);
/* contactRectTop (TWO_BYTE_SIGNED_INTEGER) */
rdpei_write_2byte_signed(s, contact->contactRectTop);
/* contactRectRight (TWO_BYTE_SIGNED_INTEGER) */
rdpei_write_2byte_signed(s, contact->contactRectRight);
/* contactRectBottom (TWO_BYTE_SIGNED_INTEGER) */
rdpei_write_2byte_signed(s, contact->contactRectBottom);
}
if (contact->fieldsPresent & CONTACT_DATA_ORIENTATION_PRESENT)
{
/* orientation (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_4byte_unsigned(s, contact->orientation);
}
if (contact->fieldsPresent & CONTACT_DATA_PRESSURE_PRESENT)
{
/* pressure (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_4byte_unsigned(s, contact->pressure);
}
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_send_touch_event_pdu(GENERIC_CHANNEL_CALLBACK* callback,
RDPINPUT_TOUCH_FRAME* frame)
{
UINT status = 0;
WINPR_ASSERT(callback);
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)callback->plugin;
if (!rdpei || !rdpei->rdpcontext)
return ERROR_INTERNAL_ERROR;
if (freerdp_settings_get_bool(rdpei->rdpcontext->settings, FreeRDP_SuspendInput))
return CHANNEL_RC_OK;
if (!frame)
return ERROR_INTERNAL_ERROR;
size_t pduLength = 64ULL + (64ULL * frame->contactCount);
wStream* s = Stream_New(NULL, pduLength);
if (!s)
{
WLog_Print(rdpei->base.log, WLOG_ERROR, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Seek(s, RDPINPUT_HEADER_LENGTH);
/**
* the time that has elapsed (in milliseconds) from when the oldest touch frame
* was generated to when it was encoded for transmission by the client.
*/
rdpei_write_4byte_unsigned(
s, (UINT32)frame->frameOffset); /* encodeTime (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_2byte_unsigned(s, 1); /* (frameCount) TWO_BYTE_UNSIGNED_INTEGER */
status = rdpei_write_touch_frame(rdpei->base.log, s, frame);
if (status)
{
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei_write_touch_frame failed with error %" PRIu32 "!", status);
Stream_Free(s, TRUE);
return status;
}
Stream_SealLength(s);
status = rdpei_send_pdu(callback, s, EVENTID_TOUCH, Stream_Length(s));
Stream_Free(s, TRUE);
return status;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_recv_sc_ready_pdu(GENERIC_CHANNEL_CALLBACK* callback, wStream* s)
{
UINT32 features = 0;
UINT32 protocolVersion = 0;
if (!callback || !callback->plugin)
return ERROR_INTERNAL_ERROR;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)callback->plugin;
if (!Stream_CheckAndLogRequiredLengthWLog(rdpei->base.log, s, 4))
return ERROR_INVALID_DATA;
Stream_Read_UINT32(s, protocolVersion); /* protocolVersion (4 bytes) */
if (protocolVersion >= RDPINPUT_PROTOCOL_V300)
{
if (!Stream_CheckAndLogRequiredLengthWLog(rdpei->base.log, s, 4))
return ERROR_INVALID_DATA;
}
if (Stream_GetRemainingLength(s) >= 4)
Stream_Read_UINT32(s, features);
if (rdpei->version > protocolVersion)
rdpei->version = protocolVersion;
rdpei->features = features;
#if 0
if (protocolVersion != RDPINPUT_PROTOCOL_V10)
{
WLog_Print(rdpei->base.log, WLOG_ERROR, "Unknown [MS-RDPEI] protocolVersion: 0x%08"PRIX32"", protocolVersion);
return -1;
}
#endif
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_recv_suspend_touch_pdu(GENERIC_CHANNEL_CALLBACK* callback, wStream* s)
{
UINT error = CHANNEL_RC_OK;
WINPR_UNUSED(s);
if (!callback || !callback->plugin)
return ERROR_INTERNAL_ERROR;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)callback->plugin;
RdpeiClientContext* context = rdpei->context;
if (!rdpei)
return ERROR_INTERNAL_ERROR;
IFCALLRET(context->SuspendTouch, error, context);
if (error)
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei->SuspendTouch failed with error %" PRIu32 "!", error);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_recv_resume_touch_pdu(GENERIC_CHANNEL_CALLBACK* callback, wStream* s)
{
UINT error = CHANNEL_RC_OK;
if (!s || !callback)
return ERROR_INTERNAL_ERROR;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)callback->plugin;
if (!rdpei)
return ERROR_INTERNAL_ERROR;
RdpeiClientContext* context = (RdpeiClientContext*)callback->plugin->pInterface;
if (!context)
return ERROR_INTERNAL_ERROR;
IFCALLRET(context->ResumeTouch, error, context);
if (error)
WLog_Print(rdpei->base.log, WLOG_ERROR, "rdpei->ResumeTouch failed with error %" PRIu32 "!",
error);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_recv_pdu(GENERIC_CHANNEL_CALLBACK* callback, wStream* s)
{
UINT16 eventId = 0;
UINT32 pduLength = 0;
UINT error = 0;
if (!callback || !s)
return ERROR_INTERNAL_ERROR;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)callback->plugin;
if (!rdpei)
return ERROR_INTERNAL_ERROR;
if (!Stream_CheckAndLogRequiredLengthWLog(rdpei->base.log, s, 6))
return ERROR_INVALID_DATA;
Stream_Read_UINT16(s, eventId); /* eventId (2 bytes) */
Stream_Read_UINT32(s, pduLength); /* pduLength (4 bytes) */
#ifdef WITH_DEBUG_RDPEI
WLog_Print(rdpei->base.log, WLOG_DEBUG,
"rdpei_recv_pdu: eventId: %" PRIu16 " (%s) length: %" PRIu32 "", eventId,
rdpei_eventid_string(eventId), pduLength);
#endif
if ((pduLength < 6) || !Stream_CheckAndLogRequiredLengthWLog(rdpei->base.log, s, pduLength - 6))
return ERROR_INVALID_DATA;
switch (eventId)
{
case EVENTID_SC_READY:
if ((error = rdpei_recv_sc_ready_pdu(callback, s)))
{
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei_recv_sc_ready_pdu failed with error %" PRIu32 "!", error);
return error;
}
if ((error = rdpei_send_cs_ready_pdu(callback)))
{
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei_send_cs_ready_pdu failed with error %" PRIu32 "!", error);
return error;
}
break;
case EVENTID_SUSPEND_TOUCH:
if ((error = rdpei_recv_suspend_touch_pdu(callback, s)))
{
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei_recv_suspend_touch_pdu failed with error %" PRIu32 "!", error);
return error;
}
break;
case EVENTID_RESUME_TOUCH:
if ((error = rdpei_recv_resume_touch_pdu(callback, s)))
{
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei_recv_resume_touch_pdu failed with error %" PRIu32 "!", error);
return error;
}
break;
default:
break;
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_on_data_received(IWTSVirtualChannelCallback* pChannelCallback, wStream* data)
{
GENERIC_CHANNEL_CALLBACK* callback = (GENERIC_CHANNEL_CALLBACK*)pChannelCallback;
return rdpei_recv_pdu(callback, data);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_on_close(IWTSVirtualChannelCallback* pChannelCallback)
{
GENERIC_CHANNEL_CALLBACK* callback = (GENERIC_CHANNEL_CALLBACK*)pChannelCallback;
if (callback)
{
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)callback->plugin;
if (rdpei && rdpei->base.listener_callback)
{
if (rdpei->base.listener_callback->channel_callback == callback)
rdpei->base.listener_callback->channel_callback = NULL;
}
}
free(callback);
return CHANNEL_RC_OK;
}
/**
* Channel Client Interface
*/
static UINT32 rdpei_get_version(RdpeiClientContext* context)
{
RDPEI_PLUGIN* rdpei = NULL;
if (!context || !context->handle)
return -1;
rdpei = (RDPEI_PLUGIN*)context->handle;
return rdpei->version;
}
static UINT32 rdpei_get_features(RdpeiClientContext* context)
{
RDPEI_PLUGIN* rdpei = NULL;
if (!context || !context->handle)
return -1;
rdpei = (RDPEI_PLUGIN*)context->handle;
return rdpei->features;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
UINT rdpei_send_frame(RdpeiClientContext* context, RDPINPUT_TOUCH_FRAME* frame)
{
UINT64 currentTime = GetTickCount64();
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)context->handle;
GENERIC_CHANNEL_CALLBACK* callback = NULL;
UINT error = 0;
callback = rdpei->base.listener_callback->channel_callback;
/* Just ignore the event if the channel is not connected */
if (!callback)
return CHANNEL_RC_OK;
if (!rdpei->previousFrameTime && !rdpei->currentFrameTime)
{
rdpei->currentFrameTime = currentTime;
frame->frameOffset = 0;
}
else
{
rdpei->currentFrameTime = currentTime;
frame->frameOffset = rdpei->currentFrameTime - rdpei->previousFrameTime;
}
if ((error = rdpei_send_touch_event_pdu(callback, frame)))
{
WLog_Print(rdpei->base.log, WLOG_ERROR,
"rdpei_send_touch_event_pdu failed with error %" PRIu32 "!", error);
return error;
}
rdpei->previousFrameTime = rdpei->currentFrameTime;
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_add_contact(RdpeiClientContext* context, const RDPINPUT_CONTACT_DATA* contact)
{
RDPINPUT_CONTACT_POINT* contactPoint = NULL;
RDPEI_PLUGIN* rdpei = NULL;
if (!context || !contact || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
EnterCriticalSection(&rdpei->lock);
contactPoint = &rdpei->contactPoints[contact->contactId];
contactPoint->data = *contact;
contactPoint->dirty = TRUE;
(void)SetEvent(rdpei->event);
LeaveCriticalSection(&rdpei->lock);
return CHANNEL_RC_OK;
}
static UINT rdpei_touch_process(RdpeiClientContext* context, INT32 externalId, UINT32 contactFlags,
INT32 x, INT32 y, INT32* contactId, UINT32 fieldFlags, va_list ap)
{
INT64 contactIdlocal = -1;
RDPINPUT_CONTACT_POINT* contactPoint = NULL;
UINT error = CHANNEL_RC_OK;
if (!context || !contactId || !context->handle)
return ERROR_INTERNAL_ERROR;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)context->handle;
/* Create a new contact point in an empty slot */
EnterCriticalSection(&rdpei->lock);
const BOOL begin = (contactFlags & RDPINPUT_CONTACT_FLAG_DOWN) != 0;
contactPoint = rdpei_contact(rdpei, externalId, !begin);
if (contactPoint)
contactIdlocal = contactPoint->contactId;
LeaveCriticalSection(&rdpei->lock);
if (contactIdlocal > UINT32_MAX)
return ERROR_INVALID_PARAMETER;
if (contactIdlocal >= 0)
{
RDPINPUT_CONTACT_DATA contact = { 0 };
contact.x = x;
contact.y = y;
contact.contactId = (UINT32)contactIdlocal;
contact.contactFlags = contactFlags;
contact.fieldsPresent = fieldFlags;
if (fieldFlags & CONTACT_DATA_CONTACTRECT_PRESENT)
{
contact.contactRectLeft = va_arg(ap, INT32);
contact.contactRectTop = va_arg(ap, INT32);
contact.contactRectRight = va_arg(ap, INT32);
contact.contactRectBottom = va_arg(ap, INT32);
}
if (fieldFlags & CONTACT_DATA_ORIENTATION_PRESENT)
{
UINT32 p = va_arg(ap, UINT32);
if (p >= 360)
{
WLog_Print(rdpei->base.log, WLOG_WARN,
"TouchContact %" PRId64 ": Invalid orientation value %" PRIu32
"degree, clamping to 359 degree",
contactIdlocal, p);
p = 359;
}
contact.orientation = p;
}
if (fieldFlags & CONTACT_DATA_PRESSURE_PRESENT)
{
UINT32 p = va_arg(ap, UINT32);
if (p > 1024)
{
WLog_Print(rdpei->base.log, WLOG_WARN,
"TouchContact %" PRId64 ": Invalid pressure value %" PRIu32
", clamping to 1024",
contactIdlocal, p);
p = 1024;
}
contact.pressure = p;
}
error = context->AddContact(context, &contact);
}
if (contactId)
*contactId = (INT32)contactIdlocal;
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_touch_begin(RdpeiClientContext* context, INT32 externalId, INT32 x, INT32 y,
INT32* contactId)
{
UINT rc = 0;
va_list ap = { 0 };
rc = rdpei_touch_process(context, externalId,
RDPINPUT_CONTACT_FLAG_DOWN | RDPINPUT_CONTACT_FLAG_INRANGE |
RDPINPUT_CONTACT_FLAG_INCONTACT,
x, y, contactId, 0, ap);
return rc;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_touch_update(RdpeiClientContext* context, INT32 externalId, INT32 x, INT32 y,
INT32* contactId)
{
UINT rc = 0;
va_list ap = { 0 };
rc = rdpei_touch_process(context, externalId,
RDPINPUT_CONTACT_FLAG_UPDATE | RDPINPUT_CONTACT_FLAG_INRANGE |
RDPINPUT_CONTACT_FLAG_INCONTACT,
x, y, contactId, 0, ap);
return rc;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_touch_end(RdpeiClientContext* context, INT32 externalId, INT32 x, INT32 y,
INT32* contactId)
{
UINT error = 0;
va_list ap = { 0 };
error = rdpei_touch_process(context, externalId,
RDPINPUT_CONTACT_FLAG_UPDATE | RDPINPUT_CONTACT_FLAG_INRANGE |
RDPINPUT_CONTACT_FLAG_INCONTACT,
x, y, contactId, 0, ap);
if (error != CHANNEL_RC_OK)
return error;
error =
rdpei_touch_process(context, externalId, RDPINPUT_CONTACT_FLAG_UP, x, y, contactId, 0, ap);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_touch_cancel(RdpeiClientContext* context, INT32 externalId, INT32 x, INT32 y,
INT32* contactId)
{
UINT rc = 0;
va_list ap = { 0 };
rc = rdpei_touch_process(context, externalId,
RDPINPUT_CONTACT_FLAG_UP | RDPINPUT_CONTACT_FLAG_CANCELED, x, y,
contactId, 0, ap);
return rc;
}
static UINT rdpei_touch_raw_event(RdpeiClientContext* context, INT32 externalId, INT32 x, INT32 y,
INT32* contactId, UINT32 flags, UINT32 fieldFlags, ...)
{
UINT rc = 0;
va_list ap;
va_start(ap, fieldFlags);
rc = rdpei_touch_process(context, externalId, flags, x, y, contactId, fieldFlags, ap);
va_end(ap);
return rc;
}
static UINT rdpei_touch_raw_event_va(RdpeiClientContext* context, INT32 externalId, INT32 x,
INT32 y, INT32* contactId, UINT32 flags, UINT32 fieldFlags,
va_list args)
{
return rdpei_touch_process(context, externalId, flags, x, y, contactId, fieldFlags, args);
}
static RDPINPUT_PEN_CONTACT_POINT* rdpei_pen_contact(RDPEI_PLUGIN* rdpei, INT32 externalId,
BOOL active)
{
if (!rdpei)
return NULL;
for (UINT32 x = 0; x < rdpei->maxPenContacts; x++)
{
RDPINPUT_PEN_CONTACT_POINT* contact = &rdpei->penContactPoints[x];
if (active)
{
if (contact->active)
{
if (contact->externalId == externalId)
return contact;
}
}
else
{
if (!contact->active)
{
contact->externalId = externalId;
contact->active = TRUE;
return contact;
}
}
}
return NULL;
}
static UINT rdpei_add_pen(RdpeiClientContext* context, INT32 externalId,
const RDPINPUT_PEN_CONTACT* contact)
{
RDPEI_PLUGIN* rdpei = NULL;
RDPINPUT_PEN_CONTACT_POINT* contactPoint = NULL;
if (!context || !contact || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
EnterCriticalSection(&rdpei->lock);
contactPoint = rdpei_pen_contact(rdpei, externalId, TRUE);
if (contactPoint)
{
contactPoint->data = *contact;
contactPoint->dirty = TRUE;
(void)SetEvent(rdpei->event);
}
LeaveCriticalSection(&rdpei->lock);
return CHANNEL_RC_OK;
}
static UINT rdpei_pen_process(RdpeiClientContext* context, INT32 externalId, UINT32 contactFlags,
UINT32 fieldFlags, INT32 x, INT32 y, va_list ap)
{
RDPINPUT_PEN_CONTACT_POINT* contactPoint = NULL;
RDPEI_PLUGIN* rdpei = NULL;
UINT error = CHANNEL_RC_OK;
if (!context || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
EnterCriticalSection(&rdpei->lock);
// Start a new contact only when it is not active.
contactPoint = rdpei_pen_contact(rdpei, externalId, TRUE);
if (!contactPoint)
{
const UINT32 mask = RDPINPUT_CONTACT_FLAG_INRANGE;
if ((contactFlags & mask) == mask)
{
contactPoint = rdpei_pen_contact(rdpei, externalId, FALSE);
}
}
LeaveCriticalSection(&rdpei->lock);
if (contactPoint != NULL)
{
RDPINPUT_PEN_CONTACT contact = { 0 };
contact.x = x;
contact.y = y;
contact.fieldsPresent = fieldFlags;
contact.contactFlags = contactFlags;
if (fieldFlags & RDPINPUT_PEN_CONTACT_PENFLAGS_PRESENT)
contact.penFlags = va_arg(ap, UINT32);
if (fieldFlags & RDPINPUT_PEN_CONTACT_PRESSURE_PRESENT)
contact.pressure = va_arg(ap, UINT32);
if (fieldFlags & RDPINPUT_PEN_CONTACT_ROTATION_PRESENT)
contact.rotation = va_arg(ap, UINT32);
if (fieldFlags & RDPINPUT_PEN_CONTACT_TILTX_PRESENT)
contact.tiltX = va_arg(ap, INT32);
if (fieldFlags & RDPINPUT_PEN_CONTACT_TILTY_PRESENT)
contact.tiltY = va_arg(ap, INT32);
error = context->AddPen(context, externalId, &contact);
}
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_begin(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags,
INT32 x, INT32 y, ...)
{
UINT error = 0;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
RDPINPUT_CONTACT_FLAG_DOWN | RDPINPUT_CONTACT_FLAG_INRANGE |
RDPINPUT_CONTACT_FLAG_INCONTACT,
fieldFlags, x, y, ap);
va_end(ap);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_update(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags,
INT32 x, INT32 y, ...)
{
UINT error = 0;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
RDPINPUT_CONTACT_FLAG_UPDATE | RDPINPUT_CONTACT_FLAG_INRANGE |
RDPINPUT_CONTACT_FLAG_INCONTACT,
fieldFlags, x, y, ap);
va_end(ap);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_end(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags, INT32 x,
INT32 y, ...)
{
UINT error = 0;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
RDPINPUT_CONTACT_FLAG_UP | RDPINPUT_CONTACT_FLAG_INRANGE, fieldFlags,
x, y, ap);
va_end(ap);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_hover_begin(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags,
INT32 x, INT32 y, ...)
{
UINT error = 0;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
RDPINPUT_CONTACT_FLAG_UPDATE | RDPINPUT_CONTACT_FLAG_INRANGE,
fieldFlags, x, y, ap);
va_end(ap);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_hover_update(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags,
INT32 x, INT32 y, ...)
{
UINT error = 0;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
RDPINPUT_CONTACT_FLAG_UPDATE | RDPINPUT_CONTACT_FLAG_INRANGE,
fieldFlags, x, y, ap);
va_end(ap);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_hover_cancel(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags,
INT32 x, INT32 y, ...)
{
UINT error = 0;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
RDPINPUT_CONTACT_FLAG_UPDATE | RDPINPUT_CONTACT_FLAG_CANCELED,
fieldFlags, x, y, ap);
va_end(ap);
return error;
}
static UINT rdpei_pen_raw_event(RdpeiClientContext* context, INT32 externalId, UINT32 contactFlags,
UINT32 fieldFlags, INT32 x, INT32 y, ...)
{
UINT error = 0;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId, contactFlags, fieldFlags, x, y, ap);
va_end(ap);
return error;
}
static UINT rdpei_pen_raw_event_va(RdpeiClientContext* context, INT32 externalId,
UINT32 contactFlags, UINT32 fieldFlags, INT32 x, INT32 y,
va_list args)
{
return rdpei_pen_process(context, externalId, contactFlags, fieldFlags, x, y, args);
}
static UINT init_plugin_cb(GENERIC_DYNVC_PLUGIN* base, rdpContext* rcontext, rdpSettings* settings)
{
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)base;
WINPR_ASSERT(base);
WINPR_UNUSED(settings);
rdpei->version = RDPINPUT_PROTOCOL_V300;
rdpei->currentFrameTime = 0;
rdpei->previousFrameTime = 0;
rdpei->maxTouchContacts = MAX_CONTACTS;
rdpei->maxPenContacts = MAX_PEN_CONTACTS;
rdpei->rdpcontext = rcontext;
WINPR_ASSERT(rdpei->base.log);
InitializeCriticalSection(&rdpei->lock);
rdpei->event = CreateEventA(NULL, TRUE, FALSE, NULL);
if (!rdpei->event)
{
WLog_Print(rdpei->base.log, WLOG_ERROR, "calloc failed!");
return CHANNEL_RC_NO_MEMORY;
}
RdpeiClientContext* context = (RdpeiClientContext*)calloc(1, sizeof(RdpeiClientContext));
if (!context)
{
WLog_Print(rdpei->base.log, WLOG_ERROR, "calloc failed!");
return CHANNEL_RC_NO_MEMORY;
}
context->clientFeaturesMask = UINT32_MAX;
context->handle = (void*)rdpei;
context->GetVersion = rdpei_get_version;
context->GetFeatures = rdpei_get_features;
context->AddContact = rdpei_add_contact;
context->TouchBegin = rdpei_touch_begin;
context->TouchUpdate = rdpei_touch_update;
context->TouchEnd = rdpei_touch_end;
context->TouchCancel = rdpei_touch_cancel;
context->TouchRawEvent = rdpei_touch_raw_event;
context->TouchRawEventVA = rdpei_touch_raw_event_va;
context->AddPen = rdpei_add_pen;
context->PenBegin = rdpei_pen_begin;
context->PenUpdate = rdpei_pen_update;
context->PenEnd = rdpei_pen_end;
context->PenHoverBegin = rdpei_pen_hover_begin;
context->PenHoverUpdate = rdpei_pen_hover_update;
context->PenHoverCancel = rdpei_pen_hover_cancel;
context->PenRawEvent = rdpei_pen_raw_event;
context->PenRawEventVA = rdpei_pen_raw_event_va;
rdpei->context = context;
rdpei->base.iface.pInterface = (void*)context;
rdpei->async =
!freerdp_settings_get_bool(rdpei->rdpcontext->settings, FreeRDP_SynchronousDynamicChannels);
if (rdpei->async)
{
rdpei->running = TRUE;
rdpei->thread = CreateThread(NULL, 0, rdpei_periodic_update, rdpei, 0, NULL);
if (!rdpei->thread)
{
WLog_Print(rdpei->base.log, WLOG_ERROR, "calloc failed!");
return CHANNEL_RC_NO_MEMORY;
}
}
else
{
if (!freerdp_client_channel_register(rdpei->rdpcontext->channels, rdpei->event,
rdpei_poll_run, rdpei))
return ERROR_INTERNAL_ERROR;
}
return CHANNEL_RC_OK;
}
static void terminate_plugin_cb(GENERIC_DYNVC_PLUGIN* base)
{
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)base;
WINPR_ASSERT(rdpei);
rdpei->running = FALSE;
if (rdpei->event)
(void)SetEvent(rdpei->event);
if (rdpei->thread)
{
(void)WaitForSingleObject(rdpei->thread, INFINITE);
(void)CloseHandle(rdpei->thread);
}
if (rdpei->event && !rdpei->async)
(void)freerdp_client_channel_unregister(rdpei->rdpcontext->channels, rdpei->event);
if (rdpei->event)
(void)CloseHandle(rdpei->event);
DeleteCriticalSection(&rdpei->lock);
free(rdpei->context);
}
static const IWTSVirtualChannelCallback geometry_callbacks = { rdpei_on_data_received,
NULL, /* Open */
rdpei_on_close, NULL };
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
FREERDP_ENTRY_POINT(UINT VCAPITYPE rdpei_DVCPluginEntry(IDRDYNVC_ENTRY_POINTS* pEntryPoints))
{
return freerdp_generic_DVCPluginEntry(pEntryPoints, RDPEI_TAG, RDPEI_DVC_CHANNEL_NAME,
sizeof(RDPEI_PLUGIN), sizeof(GENERIC_CHANNEL_CALLBACK),
&geometry_callbacks, init_plugin_cb, terminate_plugin_cb);
}
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