Add doxygen for getTextBounds()

Signed-off-by: Emil Muratov <[email protected]>

Author: vortigont

Adafruit_GFX.cpp

@@ -1415,7 +1415,18 @@ void Adafruit_GFX::getTextBounds(const char *str, int16_t x, int16_t y,
     }
 }
 
-// Overload for the same as above, but for String strings
+/**************************************************************************/
+/*!
+    @brief    Helper to determine size of a string with current font/size. Pass string and a cursor position, returns UL corner and W,H.
+    @param    str    The ascii string to measure (as an arduino String() class)
+    @param    x      The current cursor X
+    @param    y      The current cursor Y
+    @param    x1     The boundary X coordinate, set by function
+    @param    y1     The boundary Y coordinate, set by function
+    @param    w      The boundary width, set by function
+    @param    h      The boundary height, set by function
+*/
+/**************************************************************************/
 void Adafruit_GFX::getTextBounds(const String &str, int16_t x, int16_t y,
         int16_t *x1, int16_t *y1, uint16_t *w, uint16_t *h) {
     if (str.length() != 0) {