Configurable font edges ⚙

Adds top-edge and bottom-edge parameters to the font function. These define how
the box around a word is computed. The possible values are:
- ascender
- cap-height (default top edge)
- x-height
- baseline (default bottom edge)
- descender

The defaults are chosen so that it's easy to create good-looking designs with
vertical alignment. Since they are much tighter than what most other software
uses by default, the default leading had to be increased to 50% of the font size
and paragraph spacing to 100% of the font size.

The values cap-height and x-height fall back to ascender in case they are zero
because this value may occur in fonts that don't have glyphs with cap- or
x-height (like Twitter Color Emoji). Since cap-height is the default top edge,
doing no fallback would break things badly.

Removes softness in favor of a simple boolean for pages and a more finegread u8
for spacing. This is needed to make paragraph spacing consume line spacing
created by hard line breaks.

5 files changed, 0 insertions, 0 deletions

diff --git a/tests/ref/control/for.png b/tests/ref/control/for.png
index d04ea62c..f3830b34 100644
--- a/tests/ref/control/for.png
+++ b/tests/ref/control/for.png
diff --git a/tests/ref/control/if.png b/tests/ref/control/if.png
index 99bde49e..0527754e 100644
--- a/tests/ref/control/if.png
+++ b/tests/ref/control/if.png
diff --git a/tests/ref/control/invalid.png b/tests/ref/control/invalid.png
index ff4c6987..e9c64b8a 100644
--- a/tests/ref/control/invalid.png
+++ b/tests/ref/control/invalid.png
diff --git a/tests/ref/control/let.png b/tests/ref/control/let.png
index 5fb1c992..20aad953 100644
--- a/tests/ref/control/let.png
+++ b/tests/ref/control/let.png
diff --git a/tests/ref/control/while.png b/tests/ref/control/while.png
index 890131f1..2ea1bcb0 100644
--- a/tests/ref/control/while.png
+++ b/tests/ref/control/while.png