Add transform/scaling modes to GUI

Added zoom and stretch modes to GUI to mirror the transform modes
available on Android. They are reachable through a context menu or
shortcuts (Ctrl+S/Ctrl+Z).
CLI options --stretch and --zoom have been added as well.

Co-authored-by: Florian Märkl <info@florianmaerkl.de>

gui/include/avopenglwidget.h

@@ -3,6 +3,8 @@
 #ifndef CHIAKI_AVOPENGLWIDGET_H
 #define CHIAKI_AVOPENGLWIDGET_H
 
+#include "transformmode.h"
+
 #include <chiaki/log.h>
 
 #include <QOpenGLWidget>
@@ -74,21 +76,24 @@ class AVOpenGLWidget: public QOpenGLWidget
 	public:
 		static QSurfaceFormat CreateSurfaceFormat();
 
-		explicit AVOpenGLWidget(StreamSession *session, QWidget *parent = nullptr);
+		explicit AVOpenGLWidget(StreamSession *session, QWidget *parent = nullptr, TransformMode transform_mode = TransformMode::Fit);
 		~AVOpenGLWidget() override;
 
 		void SwapFrames();
 		AVOpenGLFrame *GetBackgroundFrame()	{ return &frames[1 - frame_fg]; }
 
+		void SetTransformMode(TransformMode mode) { transform_mode = mode; }
+		TransformMode GetTransformMode() const { return transform_mode; }
+
 	protected:
+		TransformMode transform_mode;
 		void mouseMoveEvent(QMouseEvent *event) override;
 
 		void initializeGL() override;
 		void paintGL() override;
 
-	private slots:
-		void ResetMouseTimeout();
 	public slots:
+		void ResetMouseTimeout();
 		void HideMouse();
 };
 

gui/include/streamsession.h

@@ -20,6 +20,7 @@
 #include "sessionlog.h"
 #include "controllermanager.h"
 #include "settings.h"
+#include "transformmode.h"
 
 #include <QObject>
 #include <QImage>
@@ -53,9 +54,17 @@ struct StreamSessionConnectInfo
 	ChiakiConnectVideoProfile video_profile;
 	unsigned int audio_buffer_size;
 	bool fullscreen;
+	TransformMode transform_mode;
 	bool enable_keyboard;
 
-	StreamSessionConnectInfo(Settings *settings, ChiakiTarget target, QString host, QByteArray regist_key, QByteArray morning, bool fullscreen);
+	StreamSessionConnectInfo(
+			Settings *settings,
+			ChiakiTarget target,
+			QString host,
+			QByteArray regist_key,
+			QByteArray morning,
+			bool fullscreen,
+			TransformMode transform_mode);
 };
 
 class StreamSession : public QObject
@@ -124,7 +133,7 @@ class StreamSession : public QObject
 #endif
 
 		void HandleKeyboardEvent(QKeyEvent *event);
-		void HandleMouseEvent(QMouseEvent *event);
+		bool HandleMouseEvent(QMouseEvent *event);
 
 	signals:
 		void FfmpegFrameAvailable();

gui/include/streamwindow.h

@@ -22,10 +22,14 @@ class StreamWindow: public QMainWindow
 		const StreamSessionConnectInfo connect_info;
 		StreamSession *session;
 
+		QAction *fullscreen_action;
+		QAction *stretch_action;
+		QAction *zoom_action;
 		AVOpenGLWidget *av_widget;
 
 		void Init();
 		void UpdateVideoTransform();
+		void UpdateTransformModeActions();
 
 	protected:
 		void keyPressEvent(QKeyEvent *event) override;
@@ -42,6 +46,8 @@ class StreamWindow: public QMainWindow
 		void SessionQuit(ChiakiQuitReason reason, const QString &reason_str);
 		void LoginPINRequested(bool incorrect);
 		void ToggleFullscreen();
+		void ToggleStretch();
+		void ToggleZoom();
 };
 
 #endif // CHIAKI_GUI_STREAMWINDOW_H

gui/include/transformmode.h

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: LicenseRef-AGPL-3.0-only-OpenSSL
+
+#ifndef CHIAKI_TRANSFORMMODE_H
+#define CHIAKI_TRANSFORMMODE_H
+
+enum class TransformMode {
+	Fit,
+	Zoom,
+	Stretch
+};
+
+#endif

gui/src/avopenglwidget.cpp

@@ -122,9 +122,9 @@ QSurfaceFormat AVOpenGLWidget::CreateSurfaceFormat()
 	return format;
 }
 
-AVOpenGLWidget::AVOpenGLWidget(StreamSession *session, QWidget *parent)
+AVOpenGLWidget::AVOpenGLWidget(StreamSession *session, QWidget *parent, TransformMode transform_mode)
 	: QOpenGLWidget(parent),
-	session(session)
+	session(session), transform_mode(transform_mode)
 {
 	enum AVPixelFormat pixel_format = chiaki_ffmpeg_decoder_get_pixel_format(session->GetFfmpegDecoder());
 	conversion_config = nullptr;
@@ -381,10 +381,10 @@ void AVOpenGLWidget::paintGL()
 		vp_width = widget_width;
 		vp_height = widget_height;
 	}
-	else
+	else if(transform_mode == TransformMode::Fit)
 	{
 		float aspect = (float)frame->width / (float)frame->height;
-		if(aspect < (float)widget_width / (float)widget_height)
+		if(widget_height && aspect < (float)widget_width / (float)widget_height)
 		{
 			vp_height = widget_height;
 			vp_width = (GLsizei)(vp_height * aspect);
@@ -395,6 +395,34 @@ void AVOpenGLWidget::paintGL()
 			vp_height = (GLsizei)(vp_width / aspect);
 		}
 	}
+	else if(transform_mode == TransformMode::Zoom)
+	{
+		float aspect = (float)frame->width / (float)frame->height;
+		if(widget_height && aspect < (float)widget_width / (float)widget_height)
+		{
+			vp_width = widget_width;
+			vp_height = (GLsizei)(vp_width / aspect);
+		}
+		else
+		{
+			vp_height = widget_height;
+			vp_width = (GLsizei)(vp_height * aspect);
+		}
+	}
+	else // transform_mode == TransformMode::Stretch
+	{
+		float aspect = (float)frame->width / (float)frame->height;
+		if(widget_height && aspect < (float)widget_width / (float)widget_height)
+		{
+			vp_height = widget_height;
+			vp_width = widget_width;
+		}
+		else
+		{
+			vp_width = widget_width;
+			vp_height = widget_height;
+		}
+	}
 
 	f->glViewport((widget_width - vp_width) / 2, (widget_height - vp_height) / 2, vp_width, vp_height);
 

gui/src/main.cpp

@@ -103,9 +103,15 @@ int real_main(int argc, char *argv[])
 	QCommandLineOption morning_option("morning", "", "morning");
 	parser.addOption(morning_option);
 
-	QCommandLineOption fullscreen_option("fullscreen", "Start window in fullscreen (only for use with stream command)");
+	QCommandLineOption fullscreen_option("fullscreen", "Start window in fullscreen mode [maintains aspect ratio, adds black bars to fill unsused parts of screen if applicable] (only for use with stream command)");
 	parser.addOption(fullscreen_option);
 
+	QCommandLineOption zoom_option("zoom", "Start window in fullscreen zoomed in to fit screen [maintains aspect ratio, cutting off edges of image to fill screen] (only for use with stream command)");
+	parser.addOption(zoom_option);
+
+	QCommandLineOption stretch_option("stretch", "Start window in fullscreen stretched to fit screen [distorts aspect ratio to fill screen] (only for use with stream command)");
+	parser.addOption(stretch_option);
+
 	parser.process(app);
 	QStringList args = parser.positionalArguments();
 
@@ -174,7 +180,21 @@ int real_main(int argc, char *argv[])
 				return 1;
 			}
 		}
-		StreamSessionConnectInfo connect_info(&settings, target, host, regist_key, morning, parser.isSet(fullscreen_option));
+		if ((parser.isSet(stretch_option) && (parser.isSet(zoom_option) || parser.isSet(fullscreen_option))) || (parser.isSet(zoom_option) && parser.isSet(fullscreen_option)))
+		{
+			printf("Must choose between fullscreen, zoom or stretch option.");
+			return 1;
+		}
+
+		StreamSessionConnectInfo connect_info(
+				&settings,
+				target,
+				host,
+				regist_key,
+				morning,
+				parser.isSet(fullscreen_option),
+				parser.isSet(zoom_option) ? TransformMode::Zoom : parser.isSet(stretch_option) ? TransformMode::Stretch : TransformMode::Fit);
+
 		return RunStream(app, connect_info);
 	}
 #ifdef CHIAKI_ENABLE_CLI

gui/src/mainwindow.cpp

@@ -249,7 +249,14 @@ void MainWindow::ServerItemWidgetTriggered()
 		}
 
 		QString host = server.GetHostAddr();
-		StreamSessionConnectInfo info(settings, server.registered_host.GetTarget(), host, server.registered_host.GetRPRegistKey(), server.registered_host.GetRPKey(), false);
+		StreamSessionConnectInfo info(
+				settings,
+				server.registered_host.GetTarget(),
+				host,
+				server.registered_host.GetRPRegistKey(),
+				server.registered_host.GetRPKey(),
+				false,
+				TransformMode::Fit);
 		new StreamWindow(info);
 	}
 	else

gui/src/streamsession.cpp

@@ -14,7 +14,14 @@
 
 #define SETSU_UPDATE_INTERVAL_MS 4
 
-StreamSessionConnectInfo::StreamSessionConnectInfo(Settings *settings, ChiakiTarget target, QString host, QByteArray regist_key, QByteArray morning, bool fullscreen)
+StreamSessionConnectInfo::StreamSessionConnectInfo(
+		Settings *settings,
+		ChiakiTarget target,
+		QString host,
+		QByteArray regist_key,
+		QByteArray morning,
+		bool fullscreen,
+		TransformMode transform_mode)
 	: settings(settings)
 {
 	key_map = settings->GetControllerMappingForDecoding();
@@ -30,6 +37,7 @@ StreamSessionConnectInfo::StreamSessionConnectInfo(Settings *settings, ChiakiTar
 	this->morning = morning;
 	audio_buffer_size = settings->GetAudioBufferSize();
 	this->fullscreen = fullscreen;
+	this->transform_mode = transform_mode;
 	this->enable_keyboard = false; // TODO: from settings
 }
 
@@ -228,13 +236,16 @@ void StreamSession::SetLoginPIN(const QString &pin)
 	chiaki_session_set_login_pin(&session, (const uint8_t *)data.constData(), data.size());
 }
 
-void StreamSession::HandleMouseEvent(QMouseEvent *event)
+bool StreamSession::HandleMouseEvent(QMouseEvent *event)
 {
+	if(event->button() != Qt::MouseButton::LeftButton)
+		return false;
 	if(event->type() == QEvent::MouseButtonPress)
 		keyboard_state.buttons |= CHIAKI_CONTROLLER_BUTTON_TOUCHPAD;
 	else
 		keyboard_state.buttons &= ~CHIAKI_CONTROLLER_BUTTON_TOUCHPAD;
 	SendFeedbackState();
+	return true;
 }
 
 void StreamSession::HandleKeyboardEvent(QKeyEvent *event)

gui/src/streamwindow.cpp

@@ -10,6 +10,7 @@
 #include <QMessageBox>
 #include <QCoreApplication>
 #include <QAction>
+#include <QMenu>
 
 StreamWindow::StreamWindow(const StreamSessionConnectInfo &connect_info, QWidget *parent)
 	: QMainWindow(parent),
@@ -23,8 +24,6 @@ StreamWindow::StreamWindow(const StreamSessionConnectInfo &connect_info, QWidget
 
 	try
 	{
-		if(connect_info.fullscreen)
-			showFullScreen();
 		Init();
 	}
 	catch(const Exception &e)
@@ -40,6 +39,8 @@ StreamWindow::~StreamWindow()
 	delete av_widget;
 }
 
+#include <QGuiApplication>
+
 void StreamWindow::Init()
 {
 	session = new StreamSession(connect_info, this);
@@ -47,10 +48,36 @@ void StreamWindow::Init()
 	connect(session, &StreamSession::SessionQuit, this, &StreamWindow::SessionQuit);
 	connect(session, &StreamSession::LoginPINRequested, this, &StreamWindow::LoginPINRequested);
 
+	const QKeySequence fullscreen_shortcut = Qt::Key_F11;
+	const QKeySequence stretch_shortcut = Qt::CTRL + Qt::Key_S;
+	const QKeySequence zoom_shortcut = Qt::CTRL + Qt::Key_Z;
+
+	fullscreen_action = new QAction(tr("Fullscreen"), this);
+	fullscreen_action->setCheckable(true);
+	fullscreen_action->setShortcut(fullscreen_shortcut);
+	addAction(fullscreen_action);
+	connect(fullscreen_action, &QAction::triggered, this, &StreamWindow::ToggleFullscreen);
+
 	if(session->GetFfmpegDecoder())
 	{
-		av_widget = new AVOpenGLWidget(session, this);
+		av_widget = new AVOpenGLWidget(session, this, connect_info.transform_mode);
 		setCentralWidget(av_widget);
+
+		av_widget->setContextMenuPolicy(Qt::CustomContextMenu);
+		connect(av_widget, &QWidget::customContextMenuRequested, this, [this](const QPoint &pos) {
+			av_widget->ResetMouseTimeout();
+
+			QMenu menu(av_widget);
+			menu.addAction(fullscreen_action);
+			menu.addSeparator();
+			menu.addAction(stretch_action);
+			menu.addAction(zoom_action);
+			releaseKeyboard();
+			connect(&menu, &QMenu::aboutToHide, this, [this] {
+				grabKeyboard();
+			});
+			menu.exec(av_widget->mapToGlobal(pos));
+		});
 	}
 	else
 	{
@@ -63,13 +90,29 @@ void StreamWindow::Init()
 
 	session->Start();
 
-	auto fullscreen_action = new QAction(tr("Fullscreen"), this);
-	fullscreen_action->setShortcut(Qt::Key_F11);
-	addAction(fullscreen_action);
-	connect(fullscreen_action, &QAction::triggered, this, &StreamWindow::ToggleFullscreen);
+	stretch_action = new QAction(tr("Stretch"), this);
+	stretch_action->setCheckable(true);
+	stretch_action->setShortcut(stretch_shortcut);
+	addAction(stretch_action);
+	connect(stretch_action, &QAction::triggered, this, &StreamWindow::ToggleStretch);
+
+	zoom_action = new QAction(tr("Zoom"), this);
+	zoom_action->setCheckable(true);
+	zoom_action->setShortcut(zoom_shortcut);
+	addAction(zoom_action);
+	connect(zoom_action, &QAction::triggered, this, &StreamWindow::ToggleZoom);
 
 	resize(connect_info.video_profile.width, connect_info.video_profile.height);
+
+	if(connect_info.fullscreen)
+	{
+		showFullScreen();
+		fullscreen_action->setChecked(true);
+	}
+	else
 		show();
+
+	UpdateTransformModeActions();
 }
 
 void StreamWindow::keyPressEvent(QKeyEvent *event)
@@ -86,20 +129,25 @@ void StreamWindow::keyReleaseEvent(QKeyEvent *event)
 
 void StreamWindow::mousePressEvent(QMouseEvent *event)
 {
-	if(session)
-		session->HandleMouseEvent(event);
+	if(session && session->HandleMouseEvent(event))
+		return;
+	QMainWindow::mousePressEvent(event);
 }
 
 void StreamWindow::mouseReleaseEvent(QMouseEvent *event)
 {
-	if(session)
-		session->HandleMouseEvent(event);
+	if(session && session->HandleMouseEvent(event))
+		return;
+	QMainWindow::mouseReleaseEvent(event);
 }
 
 void StreamWindow::mouseDoubleClickEvent(QMouseEvent *event)
 {
+	if(event->button() == Qt::MouseButton::LeftButton)
+	{
 		ToggleFullscreen();
-
+		return;
+	}
 	QMainWindow::mouseDoubleClickEvent(event);
 }
 
@@ -175,15 +223,48 @@ void StreamWindow::LoginPINRequested(bool incorrect)
 void StreamWindow::ToggleFullscreen()
 {
 	if(isFullScreen())
+	{
 		showNormal();
+		fullscreen_action->setChecked(false);
+	}
 	else
 	{
 		showFullScreen();
 		if(av_widget)
 			av_widget->HideMouse();
+		fullscreen_action->setChecked(true);
 	}
 }
 
+void StreamWindow::UpdateTransformModeActions()
+{
+	TransformMode tm = av_widget ? av_widget->GetTransformMode() : TransformMode::Fit;
+	stretch_action->setChecked(tm == TransformMode::Stretch);
+	zoom_action->setChecked(tm == TransformMode::Zoom);
+}
+
+void StreamWindow::ToggleStretch()
+{
+	if(!av_widget)
+		return;
+	av_widget->SetTransformMode(
+			av_widget->GetTransformMode() == TransformMode::Stretch
+			? TransformMode::Fit
+			: TransformMode::Stretch);
+	UpdateTransformModeActions();
+}
+
+void StreamWindow::ToggleZoom()
+{
+	if(!av_widget)
+		return;
+	av_widget->SetTransformMode(
+			av_widget->GetTransformMode() == TransformMode::Zoom
+			? TransformMode::Fit
+			: TransformMode::Zoom);
+	UpdateTransformModeActions();
+}
+
 void StreamWindow::resizeEvent(QResizeEvent *event)
 {
 	UpdateVideoTransform();