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Keep the classic bitmap name font crisp when magnified

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Antialias the coverage mask's 0.5 contour in screen space (fwidth) so large names stay ~1px-sharp instead of blurring when drawn big.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Evan Pelle
2026-06-15 03:23:34 +00:00
parent 9e5b59289b
commit b268d7410c
1 changed files with 5 additions and 2 deletions
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src/client/render/gl/shaders/name/name.frag.glsl
+5 -2
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@@ -31,9 +31,12 @@ void main() {
vec3 fillColor = mix(vec3(vNameShade), vPlayerColor.rgb, uFillUsePlayerColor);
// Classic Arial bitmap: the atlas is a coverage mask; tint it with the fill
// color, no outline (matching the old DOM-rendered names).
// color, no outline (matching the old DOM-rendered names). Antialias the 0.5
// coverage contour in screen space (fwidth) so the edge stays ~1px sharp at
// any magnification instead of blurring when names are drawn large.
if (uClassic == 1) {
float coverage = texture(uAtlas, vUV).a;
float a = texture(uAtlas, vUV).a;
float coverage = clamp((a - 0.5) / max(fwidth(a), 1e-5) + 0.5, 0.0, 1.0);
if (coverage <= 0.0) discard;
fragColor = vec4(fillColor, vPlayerColor.a * coverage);
return;