Applied-Software/ghostty
5
0
Fork 0
mirror of https://github.com/ghostty-org/ghostty.git synced 2025-07-16 16:56:09 +03:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #2438 from qwerasd205/undercurl-thickness

Browse Source 
Undercurl tweaks
This commit is contained in:
Mitchell Hashimoto
2024-10-14 12:57:11 -07:00
committed by GitHub
parent 10aad444b7 2462921681
commit 9f50ed07a5
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/font/sprite/underline.zig
View File

@ -163,7 +163,9 @@ fn drawDashed(alloc: Allocator, width: u32, thickness: u32) !CanvasAndOffset {
/// geometry. /// geometry.
fn drawCurly(alloc: Allocator, width: u32, thickness: u32) !CanvasAndOffset { fn drawCurly(alloc: Allocator, width: u32, thickness: u32) !CanvasAndOffset {
const float_width: f64 = @floatFromInt(width); const float_width: f64 = @floatFromInt(width);
const float_thick: f64 = @floatFromInt(thickness); // Because of we way we draw the undercurl, we end up making it around 1px
// thicker than it should be, to fix this we just reduce the thickness by 1.
const float_thick: f64 = @floatFromInt(@max(1, thickness -| 1));
// Calculate the wave period for a single character // Calculate the wave period for a single character
// `2 * pi...` = 1 peak per character // `2 * pi...` = 1 peak per character
@ -185,7 +187,9 @@ fn drawCurly(alloc: Allocator, width: u32, thickness: u32) !CanvasAndOffset {
// follow Xiaolin Wu's antialias algorithm to draw the curve // follow Xiaolin Wu's antialias algorithm to draw the curve
var x: u32 = 0; var x: u32 = 0;
while (x < width) : (x += 1) { while (x < width) : (x += 1) {
const t: f64 = @as(f64, @floatFromInt(x)) * wave_period; // We sample the wave function at the *middle* of each
// pixel column, to ensure that it renders symmetrically.
const t: f64 = (@as(f64, @floatFromInt(x)) + 0.5) * wave_period;
// Use the slope at this location to add thickness to // Use the slope at this location to add thickness to
// the line on this column, counteracting the thinning // the line on this column, counteracting the thinning
// caused by the slope. // caused by the slope.