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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Adobe Photoshop Source Code – CHM

Posted by jpluimers on 2025/12/19

With the permission of Adobe Systems Inc., the Computer History Museum is pleased to make available, for non-commercial use, the source code to the 1990 version 1.0.1 of Photoshop. All the code is here with the exception of the MacApp applications library that was licensed from Apple. There are 179 files in the zipped folder, comprising about 128,000 lines of mostly uncommented but well-structured code. By line count, about 75% of the code is in Pascal, about 15% is in 68000 assembler language, and the rest is data of various sorts.

https://computerhistory.org/blog/adobe-photoshop-source-code/

This entry was posted on 2025/12/19 at 22:02 and is filed under 68k, Adobe, Apple, Apple Pascal, Classic Macintosh, Development, History, Macintosh SE/30, Object Pascal, Pascal, Power User, Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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