Comparing GPU text rendering: SDF, MSDF, Slug and Rive
What happened
On September 30, 2026, an article surveying GPU text rendering approaches hit the front page of Hacker News, comparing texture atlases, SDF, MSDF and Slug. The article says SDF was introduced by Valve in 2007, using a single-channel distance field for resolution-independent crisp edges, but it rounds off the sharp corners of letters. MSDF, proposed by Viktor Chlumsky, reconstructs sharp corners by taking the median of red, green and blue channels; his msdfgen is open source under the MIT license. The article also covers Slug and Rive, but the report does not give specifics on those two.
Written by AI from the coverage · updated 2 hours ago
Coverage
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- Hacker News front pageSDF vs. MSDF vs. Slug: GPU Text Rendering
文章梳理了 GPU 文本渲染的四类方案：纹理图集、SDF、MSDF 与 Slug。SDF 由 Valve 于 2007 年提出，用单通道距离场实现分辨率无关的清晰边缘，但会磨圆字母尖角；MSDF 由 Viktor Chlumsky 提出，用红绿蓝三通道取中值重建尖角，其 msdfgen 以 MIT 协议开源。
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