godot/platform/winrt/app.cpp

/*************************************************************************/
/*  app.cpp                                                              */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
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//
// This file demonstrates how to initialize EGL in a Windows Store app, using ICoreWindow.
//

#include "app.h"

#include "core/os/dir_access.h"
#include "core/os/file_access.h"
#include "main/main.h"

using namespace Windows::ApplicationModel::Core;
using namespace Windows::ApplicationModel::Activation;
using namespace Windows::UI::Core;
using namespace Windows::UI::Input;
using namespace Windows::Foundation;
using namespace Windows::Graphics::Display;
using namespace Microsoft::WRL;
using namespace Platform;

using namespace $ext_safeprojectname$;

// Helper to convert a length in device-independent pixels (DIPs) to a length in physical pixels.
inline float ConvertDipsToPixels(float dips, float dpi) {
	static const float dipsPerInch = 96.0f;
	return floor(dips * dpi / dipsPerInch + 0.5f); // Round to nearest integer.
}

// Implementation of the IFrameworkViewSource interface, necessary to run our app.
ref class HelloTriangleApplicationSource sealed : Windows::ApplicationModel::Core::IFrameworkViewSource {
public:
	virtual Windows::ApplicationModel::Core::IFrameworkView ^ CreateView() {
		return ref new App();
	}
};

// The main function creates an IFrameworkViewSource for our app, and runs the app.
[Platform::MTAThread] int main(Platform::Array<Platform::String ^> ^) {
	auto helloTriangleApplicationSource = ref new HelloTriangleApplicationSource();
	CoreApplication::Run(helloTriangleApplicationSource);
	return 0;
}

App::App()
	: mWindowClosed(false),
	  mWindowVisible(true),
	  mWindowWidth(0),
	  mWindowHeight(0),
	  mEglDisplay(EGL_NO_DISPLAY),
	  mEglContext(EGL_NO_CONTEXT),
	  mEglSurface(EGL_NO_SURFACE) {
}

// The first method called when the IFrameworkView is being created.
void App::Initialize(CoreApplicationView ^ applicationView) {
	// Register event handlers for app lifecycle. This example includes Activated, so that we
	// can make the CoreWindow active and start rendering on the window.
	applicationView->Activated +=
			ref new TypedEventHandler<CoreApplicationView ^, IActivatedEventArgs ^>(this, &App::OnActivated);

	// Logic for other event handlers could go here.
	// Information about the Suspending and Resuming event handlers can be found here:
	// http://msdn.microsoft.com/en-us/library/windows/apps/xaml/hh994930.aspx

	os = new OSWinrt;
}

// Called when the CoreWindow object is created (or re-created).
void App::SetWindow(CoreWindow ^ p_window) {
	window = p_window;
	window->VisibilityChanged +=
			ref new TypedEventHandler<CoreWindow ^, VisibilityChangedEventArgs ^>(this, &App::OnVisibilityChanged);

	window->Closed +=
			ref new TypedEventHandler<CoreWindow ^, CoreWindowEventArgs ^>(this, &App::OnWindowClosed);

	window->SizeChanged +=
			ref new TypedEventHandler<CoreWindow ^, WindowSizeChangedEventArgs ^>(this, &App::OnWindowSizeChanged);

#if !(WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP)
	// Disable all pointer visual feedback for better performance when touching.
	// This is not supported on Windows Phone applications.
	auto pointerVisualizationSettings = PointerVisualizationSettings::GetForCurrentView();
	pointerVisualizationSettings->IsContactFeedbackEnabled = false;
	pointerVisualizationSettings->IsBarrelButtonFeedbackEnabled = false;
#endif

	window->PointerPressed +=
			ref new TypedEventHandler<CoreWindow ^, PointerEventArgs ^>(this, &App::OnPointerPressed);

	window->PointerMoved +=
			ref new TypedEventHandler<CoreWindow ^, PointerEventArgs ^>(this, &App::OnPointerMoved);

	window->PointerReleased +=
			ref new TypedEventHandler<CoreWindow ^, PointerEventArgs ^>(this, &App::OnPointerReleased);

	//window->PointerWheelChanged +=
	//	ref new TypedEventHandler<CoreWindow^, PointerEventArgs^>(this, &App::OnPointerWheelChanged);

	char *args[] = { "-path", "game", NULL };
	Main::setup("winrt", 2, args, false);

	// The CoreWindow has been created, so EGL can be initialized.
	ContextEGL *context = memnew(ContextEGL(window));
	os->set_gl_context(context);
	UpdateWindowSize(Size(window->Bounds.Width, window->Bounds.Height));

	Main::setup2();
}

static int _get_button(Windows::UI::Input::PointerPoint ^ pt) {

	using namespace Windows::UI::Input;

#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
	return BUTTON_LEFT;
#else
	switch (pt->Properties->PointerUpdateKind) {
		case PointerUpdateKind::LeftButtonPressed:
		case PointerUpdateKind::LeftButtonReleased:
			return BUTTON_LEFT;

		case PointerUpdateKind::RightButtonPressed:
		case PointerUpdateKind::RightButtonReleased:
			return BUTTON_RIGHT;

		case PointerUpdateKind::MiddleButtonPressed:
		case PointerUpdateKind::MiddleButtonReleased:
			return BUTTON_MIDDLE;

		case PointerUpdateKind::XButton1Pressed:
		case PointerUpdateKind::XButton1Released:
			return BUTTON_WHEEL_UP;

		case PointerUpdateKind::XButton2Pressed:
		case PointerUpdateKind::XButton2Released:
			return BUTTON_WHEEL_DOWN;

		default:
			break;
	}
#endif

	return 0;
};

static bool _is_touch(Windows::UI::Input::PointerPoint ^ pointerPoint) {
#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
	return true;
#else
	using namespace Windows::Devices::Input;
	switch (pointerPoint->PointerDevice->PointerDeviceType) {
		case PointerDeviceType::Touch:
		case PointerDeviceType::Pen:
			return true;
		default:
			return false;
	}
#endif
}

static Windows::Foundation::Point _get_pixel_position(CoreWindow ^ window, Windows::Foundation::Point rawPosition, OS *os) {

	Windows::Foundation::Point outputPosition;

// Compute coordinates normalized from 0..1.
// If the coordinates need to be sized to the SDL window,
// we'll do that after.
#if 1 || WINAPI_FAMILY != WINAPI_FAMILY_PHONE_APP
	outputPosition.X = rawPosition.X / window->Bounds.Width;
	outputPosition.Y = rawPosition.Y / window->Bounds.Height;
#else
	switch (DisplayProperties::CurrentOrientation) {
		case DisplayOrientations::Portrait:
			outputPosition.X = rawPosition.X / window->Bounds.Width;
			outputPosition.Y = rawPosition.Y / window->Bounds.Height;
			break;
		case DisplayOrientations::PortraitFlipped:
			outputPosition.X = 1.0f - (rawPosition.X / window->Bounds.Width);
			outputPosition.Y = 1.0f - (rawPosition.Y / window->Bounds.Height);
			break;
		case DisplayOrientations::Landscape:
			outputPosition.X = rawPosition.Y / window->Bounds.Height;
			outputPosition.Y = 1.0f - (rawPosition.X / window->Bounds.Width);
			break;
		case DisplayOrientations::LandscapeFlipped:
			outputPosition.X = 1.0f - (rawPosition.Y / window->Bounds.Height);
			outputPosition.Y = rawPosition.X / window->Bounds.Width;
			break;
		default:
			break;
	}
#endif

	OS::VideoMode vm = os->get_video_mode();
	outputPosition.X *= vm.width;
	outputPosition.Y *= vm.height;

	return outputPosition;
};

static int _get_finger(uint32_t p_touch_id) {

	return p_touch_id % 31; // for now
};

void App::pointer_event(Windows::UI::Core::CoreWindow ^ sender, Windows::UI::Core::PointerEventArgs ^ args, bool p_pressed) {

	Windows::UI::Input::PointerPoint ^ point = args->CurrentPoint;
	Windows::Foundation::Point pos = _get_pixel_position(window, point->Position, os);
	int but = _get_button(point);
	if (_is_touch(point)) {

		InputEvent event;
		event.type = InputEvent::SCREEN_TOUCH;
		event.device = 0;
		event.screen_touch.pressed = p_pressed;
		event.screen_touch.x = pos.X;
		event.screen_touch.y = pos.Y;
		event.screen_touch.index = _get_finger(point->PointerId);

		last_touch_x[event.screen_touch.index] = pos.X;
		last_touch_y[event.screen_touch.index] = pos.Y;

		os->input_event(event);
		if (event.screen_touch.index != 0)
			return;

	}; // fallthrought of sorts

	InputEvent event;
	event.type = InputEvent::MOUSE_BUTTON;
	event.device = 0;
	event.mouse_button.pressed = p_pressed;
	event.mouse_button.button_index = but;
	event.mouse_button.x = pos.X;
	event.mouse_button.y = pos.Y;
	event.mouse_button.global_x = pos.X;
	event.mouse_button.global_y = pos.Y;

	last_touch_x[31] = pos.X;
	last_touch_y[31] = pos.Y;

	os->input_event(event);
};

void App::OnPointerPressed(Windows::UI::Core::CoreWindow ^ sender, Windows::UI::Core::PointerEventArgs ^ args) {

	pointer_event(sender, args, true);
};

void App::OnPointerReleased(Windows::UI::Core::CoreWindow ^ sender, Windows::UI::Core::PointerEventArgs ^ args) {

	pointer_event(sender, args, false);
};

void App::OnPointerMoved(Windows::UI::Core::CoreWindow ^ sender, Windows::UI::Core::PointerEventArgs ^ args) {

	Windows::UI::Input::PointerPoint ^ point = args->CurrentPoint;
	Windows::Foundation::Point pos = _get_pixel_position(window, point->Position, os);

	if (_is_touch(point)) {

		InputEvent event;
		event.type = InputEvent::SCREEN_DRAG;
		event.device = 0;
		event.screen_drag.x = pos.X;
		event.screen_drag.y = pos.Y;
		event.screen_drag.index = _get_finger(point->PointerId);
		event.screen_drag.relative_x = event.screen_drag.x - last_touch_x[event.screen_drag.index];
		event.screen_drag.relative_y = event.screen_drag.y - last_touch_y[event.screen_drag.index];

		os->input_event(event);
		if (event.screen_drag.index != 0)
			return;

	}; // fallthrought of sorts

	InputEvent event;
	event.type = InputEvent::MOUSE_MOTION;
	event.device = 0;
	event.mouse_motion.x = pos.X;
	event.mouse_motion.y = pos.Y;
	event.mouse_motion.global_x = pos.X;
	event.mouse_motion.global_y = pos.Y;
	event.mouse_motion.relative_x = pos.X - last_touch_x[31];
	event.mouse_motion.relative_y = pos.Y - last_touch_y[31];

	os->input_event(event);
};

// Initializes scene resources
void App::Load(Platform::String ^ entryPoint) {
	//char* args[] = {"-test", "render", NULL};
	//Main::setup("winrt", 2, args);
}

// This method is called after the window becomes active.
void App::Run() {
	if (Main::start())
		os->run();
}

// Terminate events do not cause Uninitialize to be called. It will be called if your IFrameworkView
// class is torn down while the app is in the foreground.
void App::Uninitialize() {
	Main::cleanup();
	delete os;
}

// Application lifecycle event handler.
void App::OnActivated(CoreApplicationView ^ applicationView, IActivatedEventArgs ^ args) {
	// Run() won't start until the CoreWindow is activated.
	CoreWindow::GetForCurrentThread()->Activate();
}

// Window event handlers.
void App::OnVisibilityChanged(CoreWindow ^ sender, VisibilityChangedEventArgs ^ args) {
	mWindowVisible = args->Visible;
}

void App::OnWindowClosed(CoreWindow ^ sender, CoreWindowEventArgs ^ args) {
	mWindowClosed = true;
}

void App::OnWindowSizeChanged(CoreWindow ^ sender, WindowSizeChangedEventArgs ^ args) {
#if (WINAPI_FAMILY == WINAPI_FAMILY_PC_APP)
	// On Windows 8.1, apps are resized when they are snapped alongside other apps, or when the device is rotated.
	// The default framebuffer will be automatically resized when either of these occur.
	// In particular, on a 90 degree rotation, the default framebuffer's width and height will switch.
	UpdateWindowSize(args->Size);
#else if (WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP)
	// On Windows Phone 8.1, the window size changes when the device is rotated.
	// The default framebuffer will not be automatically resized when this occurs.
	// It is therefore up to the app to handle rotation-specific logic in its rendering code.
	//os->screen_size_changed();
	UpdateWindowSize(args->Size);
#endif
}

void App::UpdateWindowSize(Size size) {
	float dpi;
#if (WINAPI_FAMILY == WINAPI_FAMILY_PC_APP)
	DisplayInformation ^ currentDisplayInformation = DisplayInformation::GetForCurrentView();
	dpi = currentDisplayInformation->LogicalDpi;
#else if (WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP)
	dpi = DisplayProperties::LogicalDpi;
#endif
	Size pixelSize(ConvertDipsToPixels(size.Width, dpi), ConvertDipsToPixels(size.Height, dpi));

	mWindowWidth = static_cast<GLsizei>(pixelSize.Width);
	mWindowHeight = static_cast<GLsizei>(pixelSize.Height);

	OS::VideoMode vm;
	vm.width = mWindowWidth;
	vm.height = mWindowHeight;
	vm.fullscreen = true;
	vm.resizable = false;
	os->set_video_mode(vm);
}