Test

Author: bjn

lib/include/elements/support/canvas.hpp

@@ -163,6 +163,13 @@ namespace cycfi { namespace elements
          point       size;
       };
 
+      struct font_metrics
+      {
+         float       ascent;
+         float       descent;
+         float       height;
+      };
+
                         [[deprecated("Use fill_text(utf8, p) instead following artist API.")]]
       void              fill_text(point p, char const* utf8);
       void              fill_text(std::string_view utf8, point p);
@@ -174,6 +181,8 @@ namespace cycfi { namespace elements
       text_metrics      measure_text(char const* utf8);
       void              text_align(int align);
 
+      font_metrics      measure_font();
+
       ///////////////////////////////////////////////////////////////////////////////////
       // Pixmaps
 

lib/src/support/canvas.cpp

@@ -417,6 +417,13 @@ namespace cycfi { namespace elements
       };
    }
 
+   canvas::font_metrics canvas::measure_font()
+   {
+     cairo_font_extents_t font_extents;
+     cairo_scaled_font_extents(cairo_get_scaled_font(&_context), &font_extents);
+     return font_extents;
+   }
+
    void canvas::draw(pixmap const& pm, elements::rect src, elements::rect dest)
    {
       auto  state = new_state();
@@ -443,4 +450,3 @@ namespace cycfi { namespace elements
       cairo_restore(&_context);
    }
 }}
-