FreeRDP/server/shadow/shadow_subsystem.c
2019-11-07 10:53:54 +01:00

280 lines
5.8 KiB
C

/**
* FreeRDP: A Remote Desktop Protocol Implementation
*
* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "shadow.h"
#include "shadow_subsystem.h"
static pfnShadowSubsystemEntry pSubsystemEntry = NULL;
void shadow_subsystem_set_entry(pfnShadowSubsystemEntry pEntry)
{
pSubsystemEntry = pEntry;
}
static int shadow_subsystem_load_entry_points(RDP_SHADOW_ENTRY_POINTS* pEntryPoints)
{
ZeroMemory(pEntryPoints, sizeof(RDP_SHADOW_ENTRY_POINTS));
if (!pSubsystemEntry)
return -1;
if (pSubsystemEntry(pEntryPoints) < 0)
return -1;
return 1;
}
rdpShadowSubsystem* shadow_subsystem_new(void)
{
RDP_SHADOW_ENTRY_POINTS ep;
rdpShadowSubsystem* subsystem = NULL;
shadow_subsystem_load_entry_points(&ep);
if (!ep.New)
return NULL;
subsystem = ep.New();
if (!subsystem)
return NULL;
CopyMemory(&(subsystem->ep), &ep, sizeof(RDP_SHADOW_ENTRY_POINTS));
return subsystem;
}
void shadow_subsystem_free(rdpShadowSubsystem* subsystem)
{
if (subsystem && subsystem->ep.Free)
subsystem->ep.Free(subsystem);
}
int shadow_subsystem_init(rdpShadowSubsystem* subsystem, rdpShadowServer* server)
{
int status = -1;
if (!subsystem || !subsystem->ep.Init)
return -1;
subsystem->server = server;
subsystem->selectedMonitor = server->selectedMonitor;
if (!(subsystem->MsgPipe = MessagePipe_New()))
goto fail;
if (!(subsystem->updateEvent = shadow_multiclient_new()))
goto fail;
if ((status = subsystem->ep.Init(subsystem)) >= 0)
return status;
fail:
if (subsystem->MsgPipe)
{
MessagePipe_Free(subsystem->MsgPipe);
subsystem->MsgPipe = NULL;
}
if (subsystem->updateEvent)
{
shadow_multiclient_free(subsystem->updateEvent);
subsystem->updateEvent = NULL;
}
return status;
}
static void shadow_subsystem_free_queued_message(void* obj)
{
wMessage* message = (wMessage*)obj;
if (message->Free)
{
message->Free(message);
message->Free = NULL;
}
}
void shadow_subsystem_uninit(rdpShadowSubsystem* subsystem)
{
if (!subsystem)
return;
if (subsystem->ep.Uninit)
subsystem->ep.Uninit(subsystem);
if (subsystem->MsgPipe)
{
/* Release resource in messages before free */
subsystem->MsgPipe->In->object.fnObjectFree = shadow_subsystem_free_queued_message;
MessageQueue_Clear(subsystem->MsgPipe->In);
subsystem->MsgPipe->Out->object.fnObjectFree = shadow_subsystem_free_queued_message;
MessageQueue_Clear(subsystem->MsgPipe->Out);
MessagePipe_Free(subsystem->MsgPipe);
subsystem->MsgPipe = NULL;
}
if (subsystem->updateEvent)
{
shadow_multiclient_free(subsystem->updateEvent);
subsystem->updateEvent = NULL;
}
}
int shadow_subsystem_start(rdpShadowSubsystem* subsystem)
{
int status;
if (!subsystem || !subsystem->ep.Start)
return -1;
status = subsystem->ep.Start(subsystem);
return status;
}
int shadow_subsystem_stop(rdpShadowSubsystem* subsystem)
{
int status;
if (!subsystem || !subsystem->ep.Stop)
return -1;
status = subsystem->ep.Stop(subsystem);
return status;
}
UINT32 shadow_enum_monitors(MONITOR_DEF* monitors, UINT32 maxMonitors)
{
UINT32 numMonitors = 0;
RDP_SHADOW_ENTRY_POINTS ep;
if (shadow_subsystem_load_entry_points(&ep) < 0)
return -1;
numMonitors = ep.EnumMonitors(monitors, maxMonitors);
return numMonitors;
}
/**
* Common function for subsystem implementation.
* This function convert 32bit ARGB format pixels to xormask data
* and andmask data and fill into SHADOW_MSG_OUT_POINTER_ALPHA_UPDATE
* Caller should free the andMaskData and xorMaskData later.
*/
int shadow_subsystem_pointer_convert_alpha_pointer_data(
BYTE* pixels, BOOL premultiplied, UINT32 width, UINT32 height,
SHADOW_MSG_OUT_POINTER_ALPHA_UPDATE* pointerColor)
{
UINT32 x, y;
BYTE* pSrc8;
BYTE* pDst8;
int xorStep;
int andStep;
UINT32 andBit;
BYTE* andBits;
UINT32 andPixel;
BYTE A, R, G, B;
xorStep = (width * 3);
xorStep += (xorStep % 2);
andStep = ((width + 7) / 8);
andStep += (andStep % 2);
pointerColor->lengthXorMask = height * xorStep;
pointerColor->xorMaskData = (BYTE*)calloc(1, pointerColor->lengthXorMask);
if (!pointerColor->xorMaskData)
return -1;
pointerColor->lengthAndMask = height * andStep;
pointerColor->andMaskData = (BYTE*)calloc(1, pointerColor->lengthAndMask);
if (!pointerColor->andMaskData)
{
free(pointerColor->xorMaskData);
pointerColor->xorMaskData = NULL;
return -1;
}
for (y = 0; y < height; y++)
{
pSrc8 = &pixels[(width * 4) * (height - 1 - y)];
pDst8 = &(pointerColor->xorMaskData[y * xorStep]);
andBit = 0x80;
andBits = &(pointerColor->andMaskData[andStep * y]);
for (x = 0; x < width; x++)
{
B = *pSrc8++;
G = *pSrc8++;
R = *pSrc8++;
A = *pSrc8++;
andPixel = 0;
if (A < 64)
A = 0; /* pixel cannot be partially transparent */
if (!A)
{
/* transparent pixel: XOR = black, AND = 1 */
andPixel = 1;
B = G = R = 0;
}
else
{
if (premultiplied)
{
B = (B * 0xFF) / A;
G = (G * 0xFF) / A;
R = (R * 0xFF) / A;
}
}
*pDst8++ = B;
*pDst8++ = G;
*pDst8++ = R;
if (andPixel)
*andBits |= andBit;
if (!(andBit >>= 1))
{
andBits++;
andBit = 0x80;
}
}
}
return 1;
}
void shadow_subsystem_frame_update(rdpShadowSubsystem* subsystem)
{
shadow_multiclient_publish_and_wait(subsystem->updateEvent);
}