Add context menu snapshot

applications/gui2/src/modules/camera.cpp

@@ -5,6 +5,10 @@
 #include <ftl/rgbd/capabilities.hpp>
 #include <chrono>
 
+#include <opencv2/imgproc.hpp>
+#include <opencv2/imgcodecs.hpp>
+#include <opencv2/cudaarithm.hpp>
+
 #include <loguru.hpp>
 
 using ftl::gui2::Camera;
@@ -341,6 +345,19 @@ void Camera::startStreaming(const std::unordered_set<ftl::codecs::Channel> &chan
 	io->feed()->startStreaming(filter);
 }
 
+void Camera::snapshot(const std::string &filename) {
+	auto ptr = std::atomic_load(&latest_);
+	if (ptr) {
+		auto &frame = ptr->frames[frame_idx];
+		if (frame.hasChannel(channel)) {
+			const auto &snap = frame.get<cv::Mat>(channel);
+			cv::Mat output;
+			cv::cvtColor(snap, output, cv::COLOR_BGRA2BGR);
+			cv::imwrite(filename, output);
+		}
+	}
+}
+
 ftl::cuda::TextureObject<uchar4>& Camera::getFrame() {
 	if (std::atomic_load(&current_fs_)) {
 		auto& frame = current_fs_->frames[frame_idx].cast<ftl::rgbd::Frame>();

applications/gui2/src/modules/camera.hpp

@@ -61,6 +61,8 @@ public:
 	void startRecording(const std::string &filename, const std::unordered_set<ftl::codecs::Channel> &channels);
 	void startStreaming(const std::unordered_set<ftl::codecs::Channel> &channels);
 
+	void snapshot(const std::string &filename);
+
 private:
 	int frame_idx = -1;
 	ftl::data::FrameID frame_id_;

applications/gui2/src/views/camera.cpp

@@ -377,6 +377,29 @@ CameraView::CameraView(ftl::gui2::Screen* parent, ftl::gui2::Camera* ctrl) :
 		imview_->setCursor(nanogui::Cursor::Crosshair);
 		mod->setCursor(nanogui::Cursor::Crosshair);
 	}
+
+	auto theme = dynamic_cast<ftl::gui2::Screen*>(screen())->getTheme("toolbutton");
+	//this->setTheme(theme);
+
+	context_menu_ = new nanogui::Window(parent, "");
+	context_menu_->setVisible(false);
+	context_menu_->setLayout(new nanogui::BoxLayout(nanogui::Orientation::Vertical));
+	context_menu_->setTheme(theme);
+
+	auto *button = new nanogui::Button(context_menu_, "Capture Image");
+	button->setCallback([this]() {
+		char timestamp[18];
+		std::time_t t=std::time(NULL);
+		std::strftime(timestamp, sizeof(timestamp), "%F-%H%M%S", std::localtime(&t));
+		context_menu_->setVisible(false);
+		ctrl_->snapshot(std::string(timestamp)+std::string(".png"));
+	});
+
+	button = new nanogui::Button(context_menu_, "Settings");
+	button->setCallback([this, button]() {
+		context_menu_->setVisible(false);
+		ctrl_->screen->getModule<ftl::gui2::ConfigCtrl>()->show(ctrl_->getID());
+	});
 }
 
 CameraView::~CameraView() {
@@ -385,6 +408,11 @@ CameraView::~CameraView() {
 		// should be fixed in nanogui
 		panel_->dispose();
 	}
+
+	if (context_menu_->parent()->getRefCount() > 0) {
+		context_menu_->setVisible(false);
+		context_menu_->dispose();
+	}
 }
 
 void CameraView::refresh() {
@@ -434,7 +462,16 @@ bool CameraView::mouseButtonEvent(const Eigen::Vector2i &p, int button, bool dow
 		if (pos.x() >= 0.0f && pos.y() >= 0.0f) {
 			ctrl_->touch(0, ftl::codecs::TouchType::MOUSE_LEFT, pos.x(), pos.y(), 0.0f, (down) ? 255 : 0);
 		}
+		context_menu_->setVisible(false);
 		return true;
+	} else if (button == 1) {
+		if (!down) {
+			context_menu_->setPosition(p - mPos);
+			context_menu_->setVisible(true);
+			return true;
+		}
+	} else {
+		context_menu_->setVisible(false);
 	}
 	return false;
 }

applications/gui2/src/views/camera.hpp

@@ -34,6 +34,7 @@ protected:
 	Camera* ctrl_;
 	MediaPanel* panel_;
 	FTLImageView* imview_;
+	nanogui::Window *context_menu_;
 
 public:
 	EIGEN_MAKE_ALIGNED_OPERATOR_NEW

applications/gui2/src/views/camera3d.cpp

@@ -65,8 +65,7 @@ bool CameraView3D::keyboardEvent(int key, int scancode, int action, int modifier
 }
 
 bool CameraView3D::mouseButtonEvent(const Eigen::Vector2i &p, int button, bool down, int modifiers) {
-	LOG(INFO) << "mouseButtonEvent: " << p;
-	return true;
+	return CameraView::mouseButtonEvent(p, button, down, modifiers);
 }
 
 bool CameraView3D::mouseMotionEvent(const Eigen::Vector2i &p, const Eigen::Vector2i &rel, int button, int modifiers) {