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bug#32932: 27.0.50; render bugs on macOS Mojave


From: Alan Third
Subject: bug#32932: 27.0.50; render bugs on macOS Mojave
Date: Tue, 12 Nov 2019 14:38:04 +0000



On Tue, 12 Nov 2019, 13:28 Robert Pluim, <rpluim@gmail.com> wrote:
>>>>> On Mon, 11 Nov 2019 18:16:22 +0000, Alan Third <alan@idiocy.org> said:
    Alan> The main bit of the code is around the method
    Alan> createDrawingBufferWithRect in nsterm.m. It’s a simple bitmap and it’s
    Alan> very slow to draw to the screen (drawRect:). I think that there are
    Alan> things that can be done with layers and CGLayers, but I never managed
    Alan> to work out how it’s supposed to work, or if it’s even plausible. I
    Alan> don’t know if AppKit can draw directly to CGLayers.

Question #1: How do you know itʼs slow? Iʼve been using it since this
morning, and it seems ok.

A couple of people tried it and found it slow. I run a fairly vanilla Emacs and it looked ok to me, but if I full maximised it on my retina mac it was visibly slower at things like scrolling than the current master branch.


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