[channel,server] fix unguarded use of functions

If functions of channel_<name>_server are used guard them so the code
compiles if the channel is not compiled in.

channels/server/channels.c

@@ -45,14 +45,22 @@
 #include <freerdp/server/cliprdr.h>
 #include <freerdp/server/echo.h>
 #include <freerdp/server/rdpdr.h>
+#if defined(CHANNEL_RAIL_SERVER)
 #include <freerdp/server/rdpei.h>
+#endif
 #include <freerdp/server/drdynvc.h>
 #include <freerdp/server/remdesk.h>
 #include <freerdp/server/encomsp.h>
+#if defined(CHANNEL_RAIL_SERVER)
 #include <freerdp/server/rail.h>
+#endif
 #include <freerdp/server/telemetry.h>
+#if defined(CHANNEL_RDPGFX_SERVER)
 #include <freerdp/server/rdpgfx.h>
+#endif
+#if defined(CHANNEL_DISP_SERVER)
 #include <freerdp/server/disp.h>
+#endif
 
 #if defined(CHANNEL_RDPEMSC_SERVER)
 #include <freerdp/server/rdpemsc.h>
@@ -87,13 +95,21 @@ void freerdp_channels_dummy(void)
 	echo_server_context* echo = NULL;
 	RdpdrServerContext* rdpdr = NULL;
 	DrdynvcServerContext* drdynvc = NULL;
+#if defined(CHANNEL_RDPEI_SERVER)
 	RdpeiServerContext* rdpei = NULL;
+#endif
 	RemdeskServerContext* remdesk = NULL;
 	EncomspServerContext* encomsp = NULL;
+#if defined(CHANNEL_RAIL_SERVER)
 	RailServerContext* rail = NULL;
+#endif
 	TelemetryServerContext* telemetry = NULL;
+#if defined(CHANNEL_RDPGFX_SERVER)
 	RdpgfxServerContext* rdpgfx = NULL;
+#endif
+#if defined(CHANNEL_DISP_SERVER)
 	DispServerContext* disp = NULL;
+#endif
 #if defined(CHANNEL_RDPEMSC_SERVER)
 	MouseCursorServerContext* mouse_cursor = NULL;
 #endif /* CHANNEL_RDPEMSC_SERVER */
@@ -123,21 +139,28 @@ void freerdp_channels_dummy(void)
 	rdpdr_server_context_free(rdpdr);
 	drdynvc = drdynvc_server_context_new(NULL);
 	drdynvc_server_context_free(drdynvc);
+#if defined(CHANNEL_RDPEI_SERVER)
 	rdpei = rdpei_server_context_new(NULL);
 	rdpei_server_context_free(rdpei);
+#endif
 	remdesk = remdesk_server_context_new(NULL);
 	remdesk_server_context_free(remdesk);
 	encomsp = encomsp_server_context_new(NULL);
 	encomsp_server_context_free(encomsp);
+#if defined(CHANNEL_RAIL_SERVER)
 	rail = rail_server_context_new(NULL);
 	rail_server_context_free(rail);
+#endif
 	telemetry = telemetry_server_context_new(NULL);
 	telemetry_server_context_free(telemetry);
+#if defined(CHANNEL_RDPGFX_SERVER)
 	rdpgfx = rdpgfx_server_context_new(NULL);
 	rdpgfx_server_context_free(rdpgfx);
+#endif
+#if defined(CHANNEL_DISP_SERVER)
 	disp = disp_server_context_new(NULL);
 	disp_server_context_free(disp);
-
+#endif
 #if defined(CHANNEL_RDPEMSC_SERVER)
 	mouse_cursor = mouse_cursor_server_context_new(NULL);
 	mouse_cursor_server_context_free(mouse_cursor);

server/shadow/shadow_channels.c

@@ -41,26 +41,16 @@ UINT shadow_client_channels_post_connect(rdpShadowClient* client)
 
 	shadow_client_audin_init(client);
 
-	if (freerdp_settings_get_bool(client->context.settings, FreeRDP_SupportGraphicsPipeline))
-	{
 	shadow_client_rdpgfx_init(client);
-	}
 
 	return CHANNEL_RC_OK;
 }
 
 void shadow_client_channels_free(rdpShadowClient* client)
 {
-	if (freerdp_settings_get_bool(client->context.settings, FreeRDP_SupportGraphicsPipeline))
-	{
 	shadow_client_rdpgfx_uninit(client);
-	}
-
 	shadow_client_audin_uninit(client);
-
 	shadow_client_rdpsnd_uninit(client);
-
 	shadow_client_remdesk_uninit(client);
-
 	shadow_client_encomsp_uninit(client);
 }

server/shadow/shadow_client.c

@@ -2196,10 +2196,12 @@ static DWORD WINAPI shadow_client_thread(LPVOID arg)
 		events[nCount++] = ChannelEvent;
 		events[nCount++] = MessageQueue_Event(MsgQueue);
 
+#if defined(CHANNEL_RDPGFX_SERVER)
 		HANDLE gfxevent = rdpgfx_server_get_event_handle(client->rdpgfx);
 
 		if (gfxevent)
 			events[nCount++] = gfxevent;
+#endif
 
 		status = WaitForMultipleObjects(nCount, events, FALSE, INFINITE);
 
@@ -2329,6 +2331,7 @@ static DWORD WINAPI shadow_client_thread(LPVOID arg)
 			}
 		}
 
+#if defined(CHANNEL_RDPGFX_SERVER)
 		if (gfxevent)
 		{
 			if (WaitForSingleObject(gfxevent, 0) == WAIT_OBJECT_0)
@@ -2336,6 +2339,7 @@ static DWORD WINAPI shadow_client_thread(LPVOID arg)
 				rdpgfx_server_handle_messages(client->rdpgfx);
 			}
 		}
+#endif
 
 		if (WaitForSingleObject(MessageQueue_Event(MsgQueue), 0) == WAIT_OBJECT_0)
 		{

server/shadow/shadow_rdpgfx.c

@@ -29,11 +29,13 @@ int shadow_client_rdpgfx_init(rdpShadowClient* client)
 {
 	WINPR_ASSERT(client);
 
+	if (!freerdp_settings_get_bool(client->context.settings, FreeRDP_SupportGraphicsPipeline))
+		return 1;
+
+#if defined(CHANNEL_RDPGFX_SERVER)
 	RdpgfxServerContext* rdpgfx = client->rdpgfx = rdpgfx_server_context_new(client->vcm);
 	if (!rdpgfx)
-	{
 		return 0;
-	}
 
 	rdpgfx->rdpcontext = &client->context;
 
@@ -41,15 +43,19 @@ int shadow_client_rdpgfx_init(rdpShadowClient* client)
 
 	if (!IFCALLRESULT(CHANNEL_RC_OK, rdpgfx->Initialize, rdpgfx, TRUE))
 		return -1;
+#endif
 
 	return 1;
 }
 
 void shadow_client_rdpgfx_uninit(rdpShadowClient* client)
 {
+	WINPR_ASSERT(client);
 	if (client->rdpgfx)
 	{
+#if defined(CHANNEL_RDPGFX_SERVER)
 		rdpgfx_server_context_free(client->rdpgfx);
+#endif
 		client->rdpgfx = NULL;
 	}
 }