first commit

nodes/osd/vp_osd_node.cpp

@@ -0,0 +1,82 @@
+
+
+#include <opencv2/imgproc.hpp>
+#include "vp_osd_node.h"
+
+namespace vp_nodes {
+        
+    vp_osd_node::vp_osd_node(std::string node_name, std::string font):
+                            vp_node(node_name) {
+        if (!font.empty()) {
+            ft2 = cv::freetype::createFreeType2();
+            ft2->loadFontData(font, 0);   
+        }       
+        this->initialized();
+    }
+    
+    vp_osd_node::~vp_osd_node() {
+        deinitialized();
+    }
+    
+    std::shared_ptr<vp_objects::vp_meta> vp_osd_node::handle_control_meta(std::shared_ptr<vp_objects::vp_control_meta> meta) {
+        return meta;
+    }
+
+    // display logic
+    std::shared_ptr<vp_objects::vp_meta> vp_osd_node::handle_frame_meta(std::shared_ptr<vp_objects::vp_frame_meta> meta) {
+        // operations on osd_frame
+        if (meta->osd_frame.empty()) {
+            meta->osd_frame = meta->frame.clone();
+        }
+
+        auto& canvas = meta->osd_frame;
+        // scan targets
+        for (auto& i : meta->targets) {
+            // track_id
+            auto id = std::to_string(i->track_id);
+            auto labels_to_display = i->primary_label;
+
+            // tracked
+            if (i->track_id != -1) {
+                labels_to_display = "#" + id + " " + labels_to_display;
+            }
+            
+            for (auto& label : i->secondary_labels) {
+                labels_to_display += "|" + label;
+            }
+            
+            // draw tracks if size>=2
+            if (i->tracks.size() >= 2) {
+                for (int n = 0; n < (i->tracks.size() - 1); n++) {
+                    auto p1 = i->tracks[n].track_point();
+                    auto p2 = i->tracks[n + 1].track_point();
+                    cv::line(canvas, cv::Point(p1.x, p1.y), cv::Point(p2.x, p2.y), cv::Scalar(0, 255, 255), 1, cv::LINE_AA);
+                }
+            }
+
+            cv::rectangle(canvas, cv::Rect(i->x, i->y, i->width, i->height), cv::Scalar(255, 255, 0), 2);
+            if (ft2 != nullptr) {
+                ft2->putText(canvas, labels_to_display, cv::Point(i->x, i->y), 20, cv::Scalar(255, 0, 255), cv::FILLED, cv::LINE_AA, true);
+            }
+            else {               
+                //cv::putText(canvas, labels_to_display, cv::Point(i->x, i->y), 1, 1, cv::Scalar(255, 0, 255));
+                int baseline = 0;
+                auto size = cv::getTextSize(labels_to_display, 1, 1.5, 1, &baseline);
+                vp_utils::put_text_at_center_of_rect(canvas, labels_to_display, cv::Rect(i->x, i->y - size.height, size.width, size.height), true, 1, 1, cv::Scalar(), cv::Scalar(179, 52, 255), cv::Scalar(179, 52, 255));
+            }
+
+            // scan sub targets
+            for (auto& sub_target: i->sub_targets) {
+                cv::rectangle(canvas, cv::Rect(sub_target->x, sub_target->y, sub_target->width, sub_target->height), cv::Scalar(255));
+                if (ft2 != nullptr) {
+                    ft2->putText(canvas, sub_target->label, cv::Point(sub_target->x, sub_target->y), 20, cv::Scalar(0, 0, 255), cv::FILLED, cv::LINE_AA, true);
+                }
+                else {
+                    cv::putText(canvas, sub_target->label, cv::Point(sub_target->x, sub_target->y), 1, 1, cv::Scalar(0, 0, 255));
+                }
+            }
+            
+        }
+        return meta;
+    }
+}