mirror of
https://github.com/yuzu-mirror/yuzu
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158 lines
5.6 KiB
C++
158 lines
5.6 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#pragma once
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#include "common/common.h"
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#include "common/scm_rev.h"
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#include "common/string_util.h"
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#include "common/key_map.h"
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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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*/
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class EmuWindow
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{
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public:
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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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virtual void SwapBuffers() = 0;
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/// Polls window events
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virtual void PollEvents() = 0;
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/// Makes the graphics context current for the caller thread
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virtual void MakeCurrent() = 0;
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/// Releases (dunno if this is the "right" word) the GLFW context from the caller thread
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virtual void DoneCurrent() = 0;
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virtual void ReloadSetKeymaps() = 0;
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/// Signals a key press action to the HID module
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static void KeyPressed(KeyMap::HostDeviceKey key);
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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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/**
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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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config = val;
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}
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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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/**
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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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// TODO: Remove
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std::string GetWindowTitle() const {
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return window_title;
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}
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// TODO: Remove
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void SetWindowTitle(const std::string& val) {
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window_title = val;
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}
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protected:
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// TODO: Remove window title initialization
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EmuWindow() :
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window_title(Common::StringFromFormat("Citra | %s-%s", Common::g_scm_branch, Common::g_scm_desc))
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{
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// TODO
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config.min_client_area_size = std::make_pair(300u, 500u);
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active_config = config;
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}
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virtual ~EmuWindow() {}
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/**
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* Processes any pending configuration changes from the last SetConfig call.
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* @note Implementations will usually want to call this from the GUI thread.
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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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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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virtual void OnMinimalClientAreaChangeRequest(const std::pair<unsigned,unsigned>& minimal_size) {
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}
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// TODO: Remove
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std::string window_title; ///< Current window title, should be used by window impl.
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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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