不論windows/mac都可以4k/5k mon做到完整200%
最大分別係多左位做野, 唔係清晰度
KinChungE 發表於 2023-12-23 21:28

同時用過mac/win, mac ui scale 堅贏win 好多。 win scale 仲有好多app 唔識scale 啲字好矇同字走晒位。 ...
dan_dan 發表於 2024-1-6 11:56

因為Mac直接用咗5k mon
所有app無需要做任何改動直接邊長乘200%就得
Windows如果用5k mon都會有差唔多效果 ...
ARM 發表於 2024-1-6 15:54

因為Mac直接用咗5k mon
所有app無需要做任何改動直接邊長乘200%就得

Windows如果用5k mon都會有差唔多效 ...
ARM 發表於 2024-1-6 15:54

你對Mac hidpi有誤解，Windows先係200%放大呢種方式。

而Mac係用像素合併，所以唔存在Windows嗰D App唔S ...
yukashing 發表於 2025-8-18 10:37

As Martin Green says, Apple chose this resolution because it is a precise quadrupling of the pixel count on their previous screen of the same size. The computer industry has been up against a pixel density barrier for at least a decade. Because software development libraries on all the platforms specify screen coordinates in pixels rather than a floating point coordinate system, everything on the screen shrinks as you increase screen resolution. You can’t increase screen resolution too far without shipping a magnifying glass with the computer.

There are three ways around the barrier:

First, you can simply scale the screen image to retain the same actual size as on a lower resolution display. Most computers can do this now. But if the scale factor is not an integer amount, say, for example, 1.3, then graphics and text don’t scale cleanly. There are clear aliasing artifacts. There is little point in a higher resolution display if the resulting images are less crisp and readable.

Second, you can rewrite your software to switch to floating point coordinate systems, like those used by Postscript. This works a great deal better, but software developers have to rewrite their code to use it, so this doesn’t work for existing applications. And this too doesn’t solve the image scaling problem: images still look awkward when scaled by non-integer amounts.

Third, you can increase the number of pixels by exactly two, that is, two pixels in each direction or four total for each pixel in the earlier system. You can render text to take full advantage of the increased resolution. And images, when exactly doubled, look much more natural. Softer than they could be, but not distorted. And there is one more key step: you redefine pixel coordinates to be points. This decouples the coordinate system used by the developer from pixels on the screen, instead defining the system in terms of real physical dimensions.

From a developer’s perspective, not a single line of code has to change, and the application runs fine on the doubled resolution display. You can come along a little later and introduce floating point coordinates instead of integer coordinates and existing applications still work. If you want them to take full advantage of the increased resolution, you use images of doubled resolution or vector artwork, which now renders with enough precision to be a good alternate choice.

There is another important reason for this choice. Once you have doubled the resolution, you have crossed a critical perceptual threshold. You can scale images that have at least this resolution up and down without encountering scaling artifacts. This means that further increases in resolution do not require another doubling: a display with 3 pixels in each direction for 1 pixel in the older standard will work fine too. So Apple leapfrogged the pixel density barrier.

Unfortunately, other vendors cannot easily do this, because monitors are available in many intermediate resolutions. But they will probably adopt a similar approach anyway, because there is no easier way to do it.

我都係跟 quora.com 最多 upvotes 個 answer
ARM 發表於 2025-8-18 11:32

你引用呢段嘢係從未提及Apple 邊長乘200%呢樣嘢。
yukashing 發表於 2025-8-18 11:43

precise quadrupling 咪即係邊長 200%
ARM 發表於 2025-8-18 12:11

所以點話你誤解蘋果嘅hidpi，如果你的意思係話蘋果用4個像素渲染合併一個像素，就係所謂邊長2倍，咁我可 ...
yukashing 發表於 2025-8-18 16:13

The 27″ iMac released with a 5K screen instead of a 4K screen for the most likely reason that they waned to quadruple the resolution (doubled in both directions) of their current 27″ iMac. The2013 iMac 27″ had a display resolution of 2560x1440. The new iMac moved to a resolution of 5120x2880. This essentially placed 4 pixels in the place of one pixel. They continued to do this same resolution quadrupling with the 21.5″ iMac 4K, going from 1920x1080 to 3840x2160. This quadrupling makes scaling quite simple for UI scaling.

但 upvotes 第二多嘅都係講緊同一樣野
大家都明 macos 仲有做其他野去改善清晰度問題，但你咁堅持否定 5K ...
ARM 發表於 2025-8-18 18:16

唔係，你講嘅嘢係唔拉更，你覺得你自己講：

「Mac直接用咗5k mon
所有app無需要做任何改動直接邊長乘200 ...
yukashing 發表於 2025-8-19 12:59

你對Mac hidpi有誤解，Windows先係200%放大呢種方式。

而Mac係用像素合併，所以唔存在Windows嗰D App唔Support HiDPI就會濛的問題。

另外Mac唔需要一定倍數先清，例如13吋Macbook pro個Mon本身就係2560x1600，但scaled resolution就係1440x900，都唔係倍數，但D舊App都唔會濛。
yukashing 發表於 2025-8-18 10:37

真係你咁講 HiDPI 完美解決哂舊 app 模糊問題嘅
osx 10.8 嗰陣 Apple deprecated 哂堆舊 API 去迫人重寫 ...
ARM 發表於 2025-8-19 14:47