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atlas: use saturating arithmetic

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This commit is contained in:
Mitchell Hashimoto
2022-04-05 17:58:48 -07:00
parent e33aeea723
commit 876d316cda
1 changed files with 2 additions and 5 deletions
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7
src/Atlas.zig
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@ -151,17 +151,14 @@ fn fit(self: Atlas, idx: usize, width: u32, height: u32) ?u32 {
var y = node.y;
var i = idx;
var width_left = width;
while (true) : (i += 1) {
while (width_left > 0) : (i += 1) {
const n = self.nodes.items[i];
if (n.y > y) y = n.y;
// If the added height exceeds our texture size, it doesn't fit.
if ((y + height) > (self.size - 1)) return null;
// If we have no more width left (width_left - n.width < 0)
// then we are done.
if (n.width >= width_left) break;
width_left -= n.width;
width_left -|= n.width;
}
return y;