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Docs: Fonts.md: added notes about TexMinWidth,TexMinHeight.

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Probably misplaced: the document could have a section about memory usage considerations?
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omar
2026-06-02 18:05:23 +02:00
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docs/FONTS.md
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@@ -77,6 +77,17 @@ Some solutions:
You can use the `ImFontGlyphRangesBuilder` for this purpose and rebuilding your atlas between frames when new characters are needed. This will be the biggest win!
- Set `io.Fonts.Flags |= ImFontAtlasFlags_NoPowerOfTwoHeight;` to disable rounding the texture height to the next power of two.
### (5) Reduce texture resizes/copy on startup
🆕 Since 1.92, the ImFontAtlas is initially created using a 512x128 texture, then grows as glyphs and fonts are registered. Growth leads to a copy, and both the old and new sized textures are present in memory. If you use known fonts and want to reduce initial growth, you may set `TexMinWidth` and `TexMinHeight` during initializaton.
```cpp
ImFontAtlas* atlas = io.Fonts;
atlas->TexMinWidth = 1024;
atlas->TexMinHeight = 1024;
atlas->AddFont(...);
```
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