first commit

nodes/osd/vp_osd_node_v2.h

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+#pragma once
+
+#include <opencv2/freetype.hpp>
+
+#include "../vp_node.h"
+
+namespace vp_nodes {
+    // on screen display(short as osd) node.
+    // another version for vp_frame_target display, display vp_sub_target at the bottom of screen.
+    class vp_osd_node_v2: public vp_node
+    {
+    private:
+        // support chinese font
+        cv::Ptr<cv::freetype::FreeType2> ft2;
+                
+        // leave a gap at the bottom of osd frame
+        int gap_height = 256;
+        int padding = 10;
+    protected:
+        virtual std::shared_ptr<vp_objects::vp_meta> handle_frame_meta(std::shared_ptr<vp_objects::vp_frame_meta> meta) override;
+    public:
+        vp_osd_node_v2(std::string node_name, std::string font = "");
+        ~vp_osd_node_v2();
+    };
+
+}