On 27.04.16 0:34, Phil Race wrote:
Fractional metrics being "off" does not mean that *user space* advances need to be integers, it refers to *device* space advances. Of course if your API does not support floats you have a problem - particularly if - you are character advance adding in which case it is better to ask the font system for the overall advance of the text. https://docs.oracle.com/javase/8/docs/api/java/awt/RenderingHints.html#KEY_FRACTIONALMETRICS
The documentation says that in case of "fm-off" the "simplified system based on integer device positions is typically used" + "rounding advance widths for rasterized glyphs to integer distances", it does not say that the "integer distance" should be rounded to the nearest device/pixel. It says that "rounding operations as the high quality and very precise definition of the shape and metrics of the character glyphs must be matched to discrete device pixels" I guess we should confirm the specification because results of the fix will be "discrete number of device pixels", isn't it?
-- Best regards, Sergey.
