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@ -9,17 +9,33 @@
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#include "common/string_util.h"
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#include "common/key_map.h"
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// Abstraction class used to provide an interface between emulation code and the frontend (e.g. SDL,
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// QGLWidget, GLFW, etc...)
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/**
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* Abstraction class used to provide an interface between emulation code and the frontend
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* (e.g. SDL, QGLWidget, GLFW, etc...).
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*
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* Design notes on the interaction between EmuWindow and the emulation core:
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* - Generally, decisions on anything visible to the user should be left up to the GUI.
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* For example, the emulation core should not try to dictate some window title or size.
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* This stuff is not the core's business and only causes problems with regards to thread-safety
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* anyway.
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* - Under certain circumstances, it may be desirable for the core to politely request the GUI
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* to set e.g. a minimum window size. However, the GUI should always be free to ignore any
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* such hints.
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* - EmuWindow may expose some of its state as read-only to the emulation core, however care
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* should be taken to make sure the provided information is self-consistent. This requires
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* some sort of synchronization (most of this is still a TODO).
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* - DO NOT TREAT THIS CLASS AS A GUI TOOLKIT ABSTRACTION LAYER. That's not what it is. Please
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* re-read the upper points again and think about it if you don't see this.
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*/
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class EmuWindow
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{
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public:
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/// Data structure to store an emuwindow configuration
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/// Data structure to store emuwindow configuration
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struct WindowConfig {
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bool fullscreen;
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int res_width;
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int res_height;
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std::pair<unsigned,unsigned> min_client_area_size;
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};
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/// Swap buffers to display the next frame
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@ -42,52 +58,96 @@ public:
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/// Signals a key release action to the HID module
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static void KeyReleased(KeyMap::HostDeviceKey key);
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WindowConfig GetConfig() const {
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return m_config;
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/**
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* Returns currently active configuration.
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* @note Accesses to the returned object need not be consistent because it may be modified in another thread
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*/
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const WindowConfig& GetActiveConfig() const {
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return active_config;
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}
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/**
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* Requests the internal configuration to be replaced by the specified argument at some point in the future.
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* @note This method is thread-safe, because it delays configuration changes to the GUI event loop. Hence there is no guarantee on when the requested configuration will be active.
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*/
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void SetConfig(const WindowConfig& val) {
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m_config = val;
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config = val;
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}
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int GetClientAreaWidth() const {
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return m_client_area_width;
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/**
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* Gets the framebuffer size in pixels.
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* @note This method is thread-safe
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*/
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const std::pair<unsigned,unsigned> GetFramebufferSize() const {
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return framebuffer_size;
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}
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void SetClientAreaWidth(const int val) {
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m_client_area_width = val;
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}
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int GetClientAreaHeight() const {
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return m_client_area_height;
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}
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void SetClientAreaHeight(const int val) {
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m_client_area_height = val;
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}
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std::string GetWindowTitle() const {
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return m_window_title;
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}
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void SetWindowTitle(std::string val) {
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m_window_title = val;
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/**
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* Gets window client area width in logical coordinates.
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* @note For high-DPI systems, this is smaller than the framebuffer size.
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* @note This method is thread-safe
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*/
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std::pair<unsigned,unsigned> GetClientAreaSize() const {
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return std::make_pair(client_area_width, client_area_height);
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}
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protected:
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EmuWindow():
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m_window_title(Common::StringFromFormat("Citra | %s-%s", Common::g_scm_branch, Common::g_scm_desc)),
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m_client_area_width(640),
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m_client_area_height(480)
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{}
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EmuWindow()
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{
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// TODO: Find a better place to set this.
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config.min_client_area_size = std::make_pair(400u, 480u);
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active_config = config;
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}
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virtual ~EmuWindow() {}
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std::string m_window_title; ///< Current window title, should be used by window impl.
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/**
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* Processes any pending configuration changes from the last SetConfig call.
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* This method invokes OnMinimalClientAreaChangeRequest if the corresponding configuration
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* field changed.
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* @note Implementations will usually want to call this from the GUI thread.
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* @todo Actually call this in existing implementations.
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*/
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void ProcessConfigurationChanges() {
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// TODO: For proper thread safety, we should eventually implement a proper
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// multiple-writer/single-reader queue...
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int m_client_area_width; ///< Current client width, should be set by window impl.
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int m_client_area_height; ///< Current client height, should be set by window impl.
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if (config.min_client_area_size != active_config.min_client_area_size) {
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OnMinimalClientAreaChangeRequest(config.min_client_area_size);
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config.min_client_area_size = active_config.min_client_area_size;
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}
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}
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/**
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* Update internal framebuffer size with the given parameter.
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* @note EmuWindow implementations will usually use this in window resize event handlers.
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*/
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void NotifyFramebufferSizeChanged(const std::pair<unsigned,unsigned>& size) {
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framebuffer_size = size;
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}
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/**
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* Update internal client area size with the given parameter.
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* @note EmuWindow implementations will usually use this in window resize event handlers.
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*/
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void NotifyClientAreaSizeChanged(const std::pair<unsigned,unsigned>& size) {
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client_area_width = size.first;
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client_area_height = size.second;
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}
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private:
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WindowConfig m_config; ///< Internal configuration
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/**
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* Handler called when the minimal client area was requested to be changed via SetConfig.
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* For the request to be honored, EmuWindow implementations will usually reimplement this function.
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*/
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virtual void OnMinimalClientAreaChangeRequest(const std::pair<unsigned,unsigned>& minimal_size) {
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// By default, ignore this request and do nothing.
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}
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std::pair<unsigned,unsigned> framebuffer_size;
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unsigned client_area_width; ///< Current client width, should be set by window impl.
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unsigned client_area_height; ///< Current client height, should be set by window impl.
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WindowConfig config; ///< Internal configuration (changes pending for being applied in ProcessConfigurationChanges)
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WindowConfig active_config; ///< Internal active configuration
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};
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bunnei