refactor(grid-overlay): move config from XML to realsense-config.json

Replace config-settings.xml + RapidXML parsing with config_file::get_nested /
set_nested_default so grid parameters live in the standard viewer JSON config
(%APPDATA%\realsense-config.json) under a viewer_model.grid sub-object.

set_nested_default writes the keys with defaults on first launch so the user
can discover and edit them without hunting for a separate XML file.
Validation rules (out-of-range → default) are preserved.

Remove the POST_BUILD copy of config-settings.xml from CMakeLists.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Evgeni Raikhel

common/device-model.h

@@ -151,6 +151,17 @@ namespace rs2
             static const char* lpc_point_size{ "viewer_model.lpc_point_size" };
             static const char* show_safety_zones_3d{ "viewer_model.show_safety_zones_3d" };
             static const char* show_safety_zones_2d{ "viewer_model.show_safety_zones_2d" };
+#ifdef BUILD_VIEWPORT_GRID_OVERLAY
+            namespace viewport_grid
+            {
+                static const char* horizontal_lines{ "viewer_model.grid.horizontal_lines" };
+                static const char* vertical_lines  { "viewer_model.grid.vertical_lines"   };
+                static const char* line_width      { "viewer_model.grid.line_width"        };
+                static const char* line_color_r    { "viewer_model.grid.line_color_r"      };
+                static const char* line_color_g    { "viewer_model.grid.line_color_g"      };
+                static const char* line_color_b    { "viewer_model.grid.line_color_b"      };
+            }
+#endif
         }
         namespace window
         {

common/stream-model.cpp

@@ -8,8 +8,6 @@
 #include <imgui_internal.h>
 #include <realsense_imgui.h>
 #ifdef BUILD_VIEWPORT_GRID_OVERLAY
-#include "../third-party/rapidxml/rapidxml.hpp"
-#include <fstream>
 #include <iomanip>
 #include <sstream>
 #endif
@@ -35,7 +33,28 @@ namespace rs2
         show_safety_zones_2d = config_file::instance().get_or_default(
             configurations::viewer::show_safety_zones_2d, true);
 #ifdef BUILD_VIEWPORT_GRID_OVERLAY
-        load_grid_config();
+        {
+            namespace cfg = configurations::viewer::viewport_grid;
+            auto& cf = config_file::instance();
+
+            cf.set_nested_default( cfg::horizontal_lines, 1   );
+            cf.set_nested_default( cfg::vertical_lines,   1   );
+            cf.set_nested_default( cfg::line_width,       1   );
+            cf.set_nested_default( cfg::line_color_r,     255 );
+            cf.set_nested_default( cfg::line_color_g,     255 );
+            cf.set_nested_default( cfg::line_color_b,     255 );
+
+            auto valid_lines = []( int v ) { return ( v >= 1 && v <= 5 ) ? v : 1; };
+            grid_h_lines    = valid_lines( cf.get_nested<int>( cfg::horizontal_lines, 1   ) );
+            grid_v_lines    = valid_lines( cf.get_nested<int>( cfg::vertical_lines,   1   ) );
+            int w           = cf.get_nested<int>( cfg::line_width, 1 );
+            if ( w >= 1 ) grid_line_width = w;
+            int r = cf.get_nested<int>( cfg::line_color_r, 255 );
+            int g = cf.get_nested<int>( cfg::line_color_g, 255 );
+            int b = cf.get_nested<int>( cfg::line_color_b, 255 );
+            if ( r >= 0 && r <= 255 && g >= 0 && g <= 255 && b >= 0 && b <= 255 )
+            { grid_color_r = r; grid_color_g = g; grid_color_b = b; }
+        }
 #endif
     }
 
@@ -166,56 +185,6 @@ namespace rs2
         glPopAttrib();
     }
 
-    void stream_model::load_grid_config()
-    {
-        std::ifstream fin("config-settings.xml");
-        if (!fin.is_open())
-            return;
-
-        std::stringstream ss;
-        ss << fin.rdbuf();
-        auto xml = ss.str();
-
-        try
-        {
-            rapidxml::xml_document<> doc;
-            doc.parse<0>(doc.allocate_string(xml.c_str()));
-
-            auto viewer_root = doc.first_node("realsense-viewer");
-            if (!viewer_root) return;
-            auto root = viewer_root->first_node("viewport-grid");
-            if (!root) return;
-
-            auto valid_lines = [](int v) { return (v >= 1 && v <= 5) ? v : 1; };
-
-            if (auto n = root->first_node("horizontal_lines"))
-                if (auto a = n->first_attribute("count"))
-                    grid_h_lines = valid_lines(std::atoi(a->value()));
-
-            if (auto n = root->first_node("vertical_lines"))
-                if (auto a = n->first_attribute("count"))
-                    grid_v_lines = valid_lines(std::atoi(a->value()));
-
-            if (auto n = root->first_node("line_width"))
-                if (auto a = n->first_attribute("pixels"))
-                {
-                    int w = std::atoi(a->value());
-                    if (w >= 1) grid_line_width = w;
-                }
-
-            if (auto n = root->first_node("line_color"))
-            {
-                auto valid_byte = [](int v) { return v >= 0 && v <= 255; };
-                int r = grid_color_r, g = grid_color_g, b = grid_color_b;
-                if (auto a = n->first_attribute("r")) r = std::atoi(a->value());
-                if (auto a = n->first_attribute("g")) g = std::atoi(a->value());
-                if (auto a = n->first_attribute("b")) b = std::atoi(a->value());
-                if (valid_byte(r) && valid_byte(g) && valid_byte(b))
-                { grid_color_r = r; grid_color_g = g; grid_color_b = b; }
-            }
-        }
-        catch (...) {}
-    }
 #endif
 
     bool stream_model::is_stream_visible() const

common/stream-model.h

@@ -139,9 +139,6 @@ namespace rs2
         void add_dds_metadata_descriptions(std::map<rs2_frame_metadata_value, std::string>& descriptions) const;
         void deal_d585S_metadata_md_values_special_cases(const frame& f);
         std::string get_meaning(const rs2_frame_metadata_value& md_val, const std::vector<std::string>& reasons, const std::string& reason_for_zero = "") const;
-#ifdef BUILD_VIEWPORT_GRID_OVERLAY
-        void load_grid_config();
-#endif
     };
 
 

tools/realsense-viewer/CMakeLists.txt

@@ -259,12 +259,6 @@ endif()
 if(BUILD_VIEWPORT_GRID_OVERLAY)
     message(STATUS "Viewport grid overlay enabled for realsense-viewer")
     target_compile_definitions(realsense-viewer PRIVATE BUILD_VIEWPORT_GRID_OVERLAY)
-    add_custom_command(TARGET realsense-viewer POST_BUILD
-        COMMAND ${CMAKE_COMMAND} -E copy_if_different
-            ${CMAKE_CURRENT_SOURCE_DIR}/config-settings.xml
-            $<TARGET_FILE_DIR:realsense-viewer>/config-settings.xml
-        COMMENT "Copying grid config-settings.xml to output directory"
-    )
 endif()
 
 source_group("SW-Update" FILES ${SW_UPDATE_FILES})