PaintTool SAI is high quality and lightweight painting software, fully digitizer support, amazing anti-aliased paintings, provide easy and stable operation, this software make digital art more enjoyable and comfortable. This document assumes you have some knowledge of the C and C++ syntax as the data structures and algorithms here will be presented in the form of C and C++ structures and subroutines. Previous work includes my now-abandoned run-time exploitation framework SaiPal and the more recent Windows explorer thumbnail extension SaiThumbs. If you find anything in this document to be misleading, incomplete, or flat-out incorrect feel free to shoot me an email at Wunkolo (at). sai files or just to get a comprehensive understanding of the decisions that SYSTEMAX has chosen to make for their file format. This document is more directed at anyone that wants to implement their own library to read or interface with. sai file format used to archive a user's artwork and the layers of abstraction implemented by SYSTEMAX for extracting this data outside of the context of the original software. This write-up in particular is focused on the technical specifications of the user-created. This document represents about a year and a half of off-and-on hobby-research on reverse engineering the digitizing raster/vector art program PaintTool Sai.

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