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-rw-r--r--src/common/emu_window.h128
1 files changed, 94 insertions, 34 deletions
diff --git a/src/common/emu_window.h b/src/common/emu_window.h
index 6c2b598f6..4cb94fed1 100644
--- a/src/common/emu_window.h
+++ b/src/common/emu_window.h
@@ -9,17 +9,33 @@
#include "common/string_util.h"
#include "common/key_map.h"
-// Abstraction class used to provide an interface between emulation code and the frontend (e.g. SDL,
-// QGLWidget, GLFW, etc...)
+/**
+ * Abstraction class used to provide an interface between emulation code and the frontend
+ * (e.g. SDL, QGLWidget, GLFW, etc...).
+ *
+ * Design notes on the interaction between EmuWindow and the emulation core:
+ * - Generally, decisions on anything visible to the user should be left up to the GUI.
+ * For example, the emulation core should not try to dictate some window title or size.
+ * This stuff is not the core's business and only causes problems with regards to thread-safety
+ * anyway.
+ * - Under certain circumstances, it may be desirable for the core to politely request the GUI
+ * to set e.g. a minimum window size. However, the GUI should always be free to ignore any
+ * such hints.
+ * - EmuWindow may expose some of its state as read-only to the emulation core, however care
+ * should be taken to make sure the provided information is self-consistent. This requires
+ * some sort of synchronization (most of this is still a TODO).
+ * - DO NOT TREAT THIS CLASS AS A GUI TOOLKIT ABSTRACTION LAYER. That's not what it is. Please
+ * re-read the upper points again and think about it if you don't see this.
+ */
class EmuWindow
{
-
public:
- /// Data structure to store an emuwindow configuration
+ /// Data structure to store emuwindow configuration
struct WindowConfig {
bool fullscreen;
int res_width;
int res_height;
+ std::pair<unsigned,unsigned> min_client_area_size;
};
/// Swap buffers to display the next frame
@@ -42,52 +58,96 @@ public:
/// Signals a key release action to the HID module
static void KeyReleased(KeyMap::HostDeviceKey key);
- WindowConfig GetConfig() const {
- return m_config;
+ /**
+ * Returns currently active configuration.
+ * @note Accesses to the returned object need not be consistent because it may be modified in another thread
+ */
+ const WindowConfig& GetActiveConfig() const {
+ return active_config;
}
+ /**
+ * Requests the internal configuration to be replaced by the specified argument at some point in the future.
+ * @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.
+ */
void SetConfig(const WindowConfig& val) {
- m_config = val;
- }
-
- int GetClientAreaWidth() const {
- return m_client_area_width;
+ config = val;
}
- void SetClientAreaWidth(const int val) {
- m_client_area_width = val;
+ /**
+ * Gets the framebuffer size in pixels.
+ * @note This method is thread-safe
+ */
+ const std::pair<unsigned,unsigned> GetFramebufferSize() const {
+ return framebuffer_size;
}
- int GetClientAreaHeight() const {
- return m_client_area_height;
+ /**
+ * Gets window client area width in logical coordinates.
+ * @note For high-DPI systems, this is smaller than the framebuffer size.
+ * @note This method is thread-safe
+ */
+ std::pair<unsigned,unsigned> GetClientAreaSize() const {
+ return std::make_pair(client_area_width, client_area_height);
}
- void SetClientAreaHeight(const int val) {
- m_client_area_height = val;
+protected:
+ EmuWindow()
+ {
+ // TODO: Find a better place to set this.
+ config.min_client_area_size = std::make_pair(400u, 480u);
+ active_config = config;
}
+ virtual ~EmuWindow() {}
- std::string GetWindowTitle() const {
- return m_window_title;
+ /**
+ * Processes any pending configuration changes from the last SetConfig call.
+ * This method invokes OnMinimalClientAreaChangeRequest if the corresponding configuration
+ * field changed.
+ * @note Implementations will usually want to call this from the GUI thread.
+ * @todo Actually call this in existing implementations.
+ */
+ void ProcessConfigurationChanges() {
+ // TODO: For proper thread safety, we should eventually implement a proper
+ // multiple-writer/single-reader queue...
+
+ if (config.min_client_area_size != active_config.min_client_area_size) {
+ OnMinimalClientAreaChangeRequest(config.min_client_area_size);
+ config.min_client_area_size = active_config.min_client_area_size;
+ }
}
-
- void SetWindowTitle(std::string val) {
- m_window_title = val;
+
+ /**
+ * Update internal framebuffer size with the given parameter.
+ * @note EmuWindow implementations will usually use this in window resize event handlers.
+ */
+ void NotifyFramebufferSizeChanged(const std::pair<unsigned,unsigned>& size) {
+ framebuffer_size = size;
}
-protected:
- EmuWindow():
- m_window_title(Common::StringFromFormat("Citra | %s-%s", Common::g_scm_branch, Common::g_scm_desc)),
- m_client_area_width(640),
- m_client_area_height(480)
- {}
- virtual ~EmuWindow() {}
+ /**
+ * Update internal client area size with the given parameter.
+ * @note EmuWindow implementations will usually use this in window resize event handlers.
+ */
+ void NotifyClientAreaSizeChanged(const std::pair<unsigned,unsigned>& size) {
+ client_area_width = size.first;
+ client_area_height = size.second;
+ }
- std::string m_window_title; ///< Current window title, should be used by window impl.
+private:
+ /**
+ * Handler called when the minimal client area was requested to be changed via SetConfig.
+ * For the request to be honored, EmuWindow implementations will usually reimplement this function.
+ */
+ virtual void OnMinimalClientAreaChangeRequest(const std::pair<unsigned,unsigned>& minimal_size) {
+ // By default, ignore this request and do nothing.
+ }
- int m_client_area_width; ///< Current client width, should be set by window impl.
- int m_client_area_height; ///< Current client height, should be set by window impl.
+ std::pair<unsigned,unsigned> framebuffer_size;
-private:
- WindowConfig m_config; ///< Internal configuration
+ unsigned client_area_width; ///< Current client width, should be set by window impl.
+ unsigned client_area_height; ///< Current client height, should be set by window impl.
+ WindowConfig config; ///< Internal configuration (changes pending for being applied in ProcessConfigurationChanges)
+ WindowConfig active_config; ///< Internal active configuration
};