aiden/video-shader-toys
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making text pretty

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Aiden
2026-05-05 23:51:02 +10:00
parent 62c3ded1f8
commit 6ce09c0e9c
2 changed files with 62 additions and 8 deletions
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8
shaders/text-overlay/shader.slang
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@@ -20,8 +20,12 @@ float4 shadeVideo(ShaderContext context)
bool insideTextRect = textUv.x >= 0.0 && textUv.x <= 1.0 && textUv.y >= 0.0 && textUv.y <= 1.0;
float mask = insideTextRect ? sampleTitleText(textUv) : 0.0;
float fill = smoothstep(0.48, 0.54, mask);
float outline = smoothstep(0.48 - outlineWidth, 0.54 - outlineWidth, mask);
float edge = 0.5;
float aa = max(fwidth(mask) * 1.5, 0.006);
float outlineAmount = min(outlineWidth * 0.25, 0.24);
float fill = smoothstep(edge - aa, edge + aa, mask);
float outlineField = smoothstep(edge - outlineAmount - aa, edge - outlineAmount + aa, mask);
float outline = saturate(outlineField - fill);
float textAlpha = max(fill * fillColor.a, outline * outlineColor.a);
if (textAlpha <= 0.0001)
return context.sourceColor;