Units to support the TurboJPEG library is now available in the DWScript repository, you can find the relevant files in the Libraries\GraphicsLib folder, they have been tested with Delphi 10.3 in both Win32 and Win64. The DLLs are those of the latest 2.05 version.

The TurboJPEG library (aka “libjpeg-turbo”) provides a fast implementation of the libjpeg API, but the files here target the TurboJPEG core, rather than the libjpeg compatibility layer (see its documention).
The TurboJPEG API is less rich, but quite simple to use and very convenient.

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