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@@ -39,6 +39,8 @@ GD has builtin support for:
It also has optional support for more formats via external libraries:
+* [HEIF](https://en.wikipedia.org/wiki/High_Efficiency_Image_File_Format) via [libheif](https://github.com/strukturag/libheif/)
+ * Also it includes [AVIF](https://en.wikipedia.org/wiki/AV1#AV1_Image_File_Format_%28AVIF%29) read support if your system's `libheif` has AV1 decoding.
* [JPEG](https://en.wikipedia.org/wiki/JPEG) via [IJG/libjpeg](http://www.ijg.org/) or [libjpeg-turbo](http://libjpeg-turbo.virtualgl.org/)
* Does not include [JPEG 2000](https://en.wikipedia.org/wiki/JPEG_2000)
* [PNG](https://en.wikipedia.org/wiki/Portable_Network_Graphics) via [libpng](http://www.libpng.org/)