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Concept
MacPaint
Summary
MacPaint is a raster graphics editor developed by Apple Computer and released with the original Macintosh personal computer on January 24, 1984. It was sold separately for US$195 with its word processing counterpart, MacWrite. MacPaint was notable because it could generate graphics that could be used by other applications. It taught consumers what a graphics-based system could do by using the mouse, the clipboard, and QuickDraw picture language. Pictures could be cut from MacPaint and pasted into MacWrite documents.
The original MacPaint was developed by Bill Atkinson, a member of Apple's original Macintosh development team. Early development versions of MacPaint were called MacSketch, still retaining part of the name of its roots, LisaSketch. It was later developed by Claris, the software subsidiary of Apple which was formed in 1987. The last version of MacPaint was version 2.0, released in 1988. It was discontinued by Claris in 1998 because of diminishing sales.
MacPaint was written by Bill Atkinson, a member of Apple's original Macintosh development team. The original MacPaint consisted of 5,804 lines of Pascal computer code, augmented by another 2,738 lines of 68000 assembly language. MacPaint's user interface was designed by Susan Kare, also a member of the Macintosh team. Kare also beta-tested MacPaint before release.
MacPaint allow users to edit a 576-by-720 pixel, 72dpi bitmap (slightly wider than the screen, and slightly more than twice as tall as the screen). A occupies most of the screen real estate, offering a viewport into a portion of the bitmap, with toolbars and pattern palettes around it.
MacPaint uses two offscreen memory buffers to avoid flicker when dragging shapes or images across the screen. One of these buffers contained the existing pixels of a document, and the other contained the pixels of its previous state. The second buffer was used as the basis of the software's undo feature. In April 1983, the software's name was changed from MacSketch to MacPaint. The original MacPaint was programmed as a single-document interface.
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