Commit c4e8ee5e authored by Jason Rumney's avatar Jason Rumney

(PIXEL_TO_POINT): Clarify usage in comment.

parent 3a8105cd
......@@ -477,8 +477,11 @@ struct font_bitmap
on resolution DPI. */
#define POINT_TO_PIXEL(POINT, DPI) ((POINT) * (DPI) / PT_PER_INCH + 0.5)
/* Return a point size (double) corresponding to POINT size (integer)
on resolution DPI. */
/* Return a point size corresponding to POINT size (integer)
on resolution DPI. Note that though point size is a double, we expect
it to be rounded to an int, so we add 0.5 here. If the desired value
is tenths of points (as in xfld specs), then the pixel size should
be multiplied BEFORE the conversion to avoid magnifying the error. */
#define PIXEL_TO_POINT(PIXEL, DPI) ((PIXEL) * PT_PER_INCH / (DPI) + 0.5)
/* Ignore the difference of font pixel sizes less than or equal to
......
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