Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/client/SDL/SDL2/sdl_disp.hpp

@@ -0,0 +1,82 @@
+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ * SDL Display Control Channel
+ *
+ * Copyright 2023 Armin Novak <armin.novak@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.
+ */
+#pragma once
+
+#include <freerdp/types.h>
+#include <freerdp/event.h>
+#include <freerdp/client/disp.h>
+
+#include "sdl_types.hpp"
+
+#include <SDL.h>
+
+class sdlDispContext
+{
+
+  public:
+	explicit sdlDispContext(SdlContext* sdl);
+	sdlDispContext(const sdlDispContext& other) = delete;
+	sdlDispContext(sdlDispContext&& other) = delete;
+	~sdlDispContext();
+
+	sdlDispContext& operator=(const sdlDispContext& other) = delete;
+	sdlDispContext& operator=(sdlDispContext&& other) = delete;
+
+	BOOL init(DispClientContext* disp);
+	BOOL uninit(DispClientContext* disp);
+
+#if SDL_VERSION_ATLEAST(2, 0, 10)
+	BOOL handle_display_event(const SDL_DisplayEvent* ev);
+#endif
+
+	BOOL handle_window_event(const SDL_WindowEvent* ev);
+
+  private:
+	UINT DisplayControlCaps(UINT32 maxNumMonitors, UINT32 maxMonitorAreaFactorA,
+	                        UINT32 maxMonitorAreaFactorB);
+	BOOL set_window_resizable();
+
+	BOOL sendResize();
+	BOOL settings_changed();
+	BOOL update_last_sent();
+	UINT sendLayout(const rdpMonitor* monitors, size_t nmonitors);
+
+	BOOL addTimer();
+
+	static UINT DisplayControlCaps(DispClientContext* disp, UINT32 maxNumMonitors,
+	                               UINT32 maxMonitorAreaFactorA, UINT32 maxMonitorAreaFactorB);
+	static void OnActivated(void* context, const ActivatedEventArgs* e);
+	static void OnGraphicsReset(void* context, const GraphicsResetEventArgs* e);
+	static Uint32 SDLCALL OnTimer(Uint32 interval, void* param);
+
+	SdlContext* _sdl = nullptr;
+	DispClientContext* _disp = nullptr;
+	int _lastSentWidth = -1;
+	int _lastSentHeight = -1;
+	UINT64 _lastSentDate = 0;
+	int _targetWidth = -1;
+	int _targetHeight = -1;
+	BOOL _activated = FALSE;
+	BOOL _waitingResize = FALSE;
+	UINT16 _lastSentDesktopOrientation = 0;
+	UINT32 _lastSentDesktopScaleFactor = 0;
+	UINT32 _lastSentDeviceScaleFactor = 0;
+	SDL_TimerID _timer = 0;
+	unsigned _timer_retries = 0;
+};