Comments about GlyphExtraSpacing (#1192)

imgui.cpp

@@ -430,7 +430,8 @@
       ImFontConfig config;
       config.OversampleH = 3;
       config.OversampleV = 1;
-      config.GlyphExtraSpacing.x = 1.0f;
+      config.GlyphOffset.y -= 2.0f;      // Move everything by 2 pixels up
+      config.GlyphExtraSpacing.x = 1.0f; // Increase spacing between characters
       io.Fonts->LoadFromFileTTF("myfontfile.ttf", size_pixels, &config);
 
       // Combine multiple fonts into one (e.g. for icon fonts)

imgui.h

@@ -1280,7 +1280,7 @@ struct ImFontConfig
     float           SizePixels;                 //          // Size in pixels for rasterizer
     int             OversampleH, OversampleV;   // 3, 1     // Rasterize at higher quality for sub-pixel positioning. We don't use sub-pixel positions on the Y axis.
     bool            PixelSnapH;                 // false    // Align every glyph to pixel boundary. Useful e.g. if you are merging a non-pixel aligned font with the default font. If enabled, you can set OversampleH/V to 1.
-    ImVec2          GlyphExtraSpacing;          // 0, 0     // Extra spacing (in pixels) between glyphs
+    ImVec2          GlyphExtraSpacing;          // 0, 0     // Extra spacing (in pixels) between glyphs. Only X axis is supported for now.
     ImVec2          GlyphOffset;                // 0, 0     // Offset all glyphs from this font input
     const ImWchar*  GlyphRanges;                //          // Pointer to a user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list). THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE.
     bool            MergeMode;                  // false    // Merge into previous ImFont, so you can combine multiple inputs font into one ImFont (e.g. ASCII font + icons + Japanese glyphs). You may want to use GlyphOffset.y when merge font of different heights.