1 files changed, 34 insertions, 0 deletions
diff --git a/src/gdisp/mcufont/mf_kerning.h b/src/gdisp/mcufont/mf_kerning.h
new file mode 100644
index 00000000..043265c7
--- /dev/null
+++ b/src/gdisp/mcufont/mf_kerning.h
@@ -0,0 +1,34 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/* Automatic kerning for font rendering. This solves the issue where some
+ * fonts (especially serif fonts) have too much space between specific
+ * character pairs, like WA or L'.
+ */
+
+#ifndef _MF_KERNING_H_
+#define _MF_KERNING_H_
+
+#include "mf_config.h"
+#include "mf_rlefont.h"
+
+/* Compute the kerning adjustment when c1 is followed by c2.
+ * 
+ * font: Pointer to the font definition.
+ * c1: The previous character.
+ * c2: The next character to render.
+ * 
+ * Returns the offset to add to the x position for c2.
+ */
+#if MF_USE_KERNING
+MF_EXTERN int8_t mf_compute_kerning(const struct mf_font_s *font,
+                                    mf_char c1, mf_char c2);
+#else
+#define mf_compute_kerning(font, c1, c2)		0
+#endif
+
+#endif