Marcel Taeumel uploaded a new version of Morphic to project The Trunk: http://source.squeak.org/trunk/Morphic-mt.1952.mcz
==================== Summary ====================
Name: Morphic-mt.1952 Author: mt Time: 30 March 2022, 10:10:15.250457 am UUID: 57eecf53-ca8b-6e42-b0cb-27c17f2c36fa Ancestors: Morphic-mt.1951
Adds commentary about the double-buffering that happens in Morphic on platforms that do not support #deferUpdates: such as macOS.
=============== Diff against Morphic-mt.1951 ===============
Item was changed: ----- Method: FormCanvas>>showAt:invalidRects: (in category 'other') ----- showAt: pt invalidRects: updateRects + "Show the receiver's bits (i.e, the form it is currently drawing on) on the screen, which is represented by the global Display form. NOTE THAT #copyBits has the side effect of calling #primShowRectLeft:right:top:bottom: if the blitting target is that Display form. Thus, it is similar to calling #forceDamateToScreen: with updateRects after modifying Display directly but in deferred-drawing mode. Yet, not all platforms support #deferUpdates:, and that is why this method exists." + | blt | blt := (BitBlt toForm: Display) sourceForm: form; combinationRule: Form over. updateRects do: [:rect | blt sourceRect: rect; destOrigin: rect topLeft + pt; + copyBits "...entails #primShowRect:... see above"]! - copyBits]!
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