addresses #2561 - adds support for most Git branch drawing characters as
specified in 
except for fading vertical and horizontal lines.
Adds git_draw_node function and a new Git node type.
Add this range (0xf5d0...0xf60d) for Git branch characters, to tests.
adds vline_middle_xy and hline_middle_xy for node connections.
add git characters to Face.zig.
- Make canvas geometry primitives generic, use `Rect(u32)` for `rect`
function, so that we don't have to worry about negatives or rounding.
- Make `Quads` struct packed just in case it gets non-comptime use in
the future.
- Clarify comment on why we're discarding out of range pixels + runtime
unreachable for any other type of error which we shouldn't ever see.
- Move z2d import above in-tree imports.
More complete coverage of the Symbols For Legacy Computing block,
including characters from Unicode 16.0.
Pixman and the web canvas impl for Canvas have been removed in favor of
z2d for drawing, since it has a nicer API with more powerful methods,
and is in Zig with no specific platform optimizations so should compile
to wasm no problem.
Use a single unified function for intersection-style line drawing chars,
and one for fractional block characters. Add a ground truth image based
on this commit for the regression test (differences from before changes
validated visually, 1 incorrect rendering actually fixed)
Previous implementation would draw dashes to the edge of the character
cell, which would result in double-wide dashes at the point where they
tiled. This fixes that, and also generally implements it in a cleaner
way than before.
Some box codepoints (the cursor) want to use the original font metrics
height but others (corners) want to use the full grid height. I can't
see a better way to do this than manually maintaining a switch here. We
can add codepoints as needed.
Fixes#757
The x/y is unsigned (as it should be, since top-left is 0,0). In the
case of a very small grid size and certain thickness settings, its
possible to overflow. In this scenario, the only reasonable thing to do
is just clamp to 0 because some sprites are going to look weird with
small enough grids anyways.
Fixes#143
There were multiple issues with the previous calculation. First, we
expected dash width COULD be negative and protected against it, but our
dash width calculation type was unsigned! With the proper font metrics,
this led to an underflow safey panic.
Second, as part of the dash width calculation, we are tryign to downstep
the size of the gaps so we can try to fit dashes within a cell. But we
were not using those adjusted gap sizes. With the proper font metrics,
this could lead to an assertion failure seen in #143.
This fixes the calculations. They produce the same numbers, but do so in
a more Zig-idiomatic way while fixing the above two issues.
