The Racket repository
842ce2f436
The backing bitmap for a canvas is created as a CGLayer, which can
make screen refresh much faster. Also, calling the `make-bitmap` method
of `canvas%` produces a CGLayer-based bitmap, so drawing those bitmaps
to a fast context can be fast.
The improvement particularly helps with Retina displays, making
DrRacket more responsive and increasing the potential frame rate
of Slideshow.
(cherry picked from commit
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| INSTALL.txt | ||
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| README.txt | ||
This is the source code for the main Racket distribution. See "INSTALL.txt" for information on building Racket. License ------- Racket Copyright (c) 2010-2013 PLT Design Inc. Racket is distributed under the GNU Lesser General Public License (LGPL). This means that you can link Racket into proprietary applications, provided you follow the rules stated in the LGPL. You can also modify Racket; if you distribute a modified version, you must distribute it under the terms of the LGPL, which in particular means that you must release the source code for the modified software. See racket/src/COPYING_LESSER.txt for more information.