Research and programming takes time, unfortunately I don’t have a sponsor for it to focus on. The problem is that I haven’t found any really useful information about this on the web so far. It can be horizontal (e.g. This dialog may be invoked by Element Other Info Horizontal Baselines (or Vertical Baselines ). When I reduced the descent to 600 and increased the ascent to 2733 (keeping the total same) with the. The baseline dialog, and the OpenType BASE table. In my case, the descent was 800 while the ascent was 2533 which was causing my font to be shifted more towards the top. I think that fonts with variable widths like Adobe Source Code Pro work like this. The baseline is an imaginary line that is used to ‘guide’ glyphs when rendering text. I've figured that it's the ratio between the ascent and descent values that matters. In the FontForge coordinate system, the baseline is at their 0 point on their vertical access. In the same way as the effect of the underhang has optical impact in a font design, an area of overshoot is needed to provide the illusion of alignment at the x-height and at the cap-height (see below). I also don’t know how to change the tangents so that a letter like “O” remains round and doesn’t get any kinks.Ī completely different approach would be to start with strokes only (quasi width 0) and then put the widths on top. Without underhang, characters with curves at the baseline will appear to not be sitting correctly within a line of text. With the “O”, some points have to be moved inwards. The trick is to change the supporting points only on the X-axis AND to keep the widths of the letter strokes the same. I have already worked out the principle, but I haven’t programmed it yet. Some legacy TrueType fonts may have been built with a shortened version 0 OS/2 table. Since your question I have been thinking about how to use JavaScript to make letters bolder or lighter. Note: Documentation for OS/2 version 0 in Apple’s TrueType Reference Manual stops at the usLastCharIndex field and does not include the last five fields of the table as it was defined by Microsoft. Simple vector tools in Illustrator are not enough to make letters bold.
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