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font/sprite: no more margin in atlas region

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We no longer need a margin in the atlas because we always sample with
nearest neighbor and our glyphs are always pixel perfect, no worry about
interpolation between adjacent glyphs anymore!
This commit is contained in:
Qwerasd
2025-07-05 22:13:26 -06:00
parent 87f35bd1c1
commit 8f50c7f269
1 changed files with 1 additions and 18 deletions
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19
src/font/sprite/canvas.zig
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@ -140,24 +140,7 @@ pub const Canvas = struct {
const region_height = sfc_height -| self.clip_top -| self.clip_bottom;
// Allocate our texture atlas region
const region = region: {
// Reserve a region with a 1px margin on the bottom and right edges
// so that we can avoid interpolation between adjacent glyphs during
// texture sampling.
var region = try atlas.reserve(
alloc,
region_width + 1,
region_height + 1,
);
// Modify the region to remove the margin so that we write to the
// non-zero location. The data in an Altlas is always initialized
// to zero (Atlas.clear) so we don't need to worry about zero-ing
// that.
region.width -= 1;
region.height -= 1;
break :region region;
};
const region = try atlas.reserve(alloc, region_width, region_height);
if (region.width > 0 and region.height > 0) {
const buffer: []u8 = @ptrCast(self.sfc.image_surface_alpha8.buf);