Implement ExtraLineHeight and ExtraLineAdvance (fixup: Expose ExtraLineHeight and ExtraLineAdvance in style editor)

Author: thedmd

imgui.cpp

@@ -11968,7 +11968,13 @@ void ImGui::DebugNodeFont(ImFont* font)
         "You may oversample them to get some flexibility with scaling. "
         "You can also render at multiple sizes and select which one to use at runtime.\n\n"
         "(Glimmer of hope: the atlas system will be rewritten in the future to make scaling more flexible.)");
+    SetNextItemWidth(GetFontSize() * 8);
+    DragFloat("Extra line height", &font->ExtraLineHeight, 1.0f, -font->FontSize, FLT_MAX, "%g");
+    SetNextItemWidth(GetFontSize() * 8);
+    DragFloat("Extra line advance", &font->ExtraLineAdvance, 1.0f, -FLT_MAX, FLT_MAX, "%g");
     Text("Ascent: %f, Descent: %f, Height: %f", font->Ascent, font->Descent, font->Ascent - font->Descent);
+    Text("Line Height: %f", font->FontSize + font->ExtraLineHeight, font->Ascent - font->Descent + font->ExtraLineHeight + font->ExtraLineAdvance);
+    Text("Line Advance: %f", font->FontSize + font->ExtraLineHeight + font->ExtraLineAdvance);
     char c_str[5];
     Text("Fallback character: '%s' (U+%04X)", ImTextCharToUtf8(c_str, font->FallbackChar), font->FallbackChar);
     Text("Ellipsis character: '%s' (U+%04X)", ImTextCharToUtf8(c_str, font->EllipsisChar), font->EllipsisChar);