英文:
Enabling High DPI makes TImage smaller at runtime than at design-time
问题
我有一个宽度为700、高度为500的窗体。我在上面放了一个TImage，在设计时设置Align=alClient和Stretch=True。
在运行时，图像像素变得模糊。如果我将TImage.Stretch属性设置为False，那么在运行时，图像的大小将显示为窗体大小的一半，位于左上角。每个图像在运行时都会比实际大小变小。
如果我禁用高DPI，那么一切都正常工作。
我使用Delphi Tokyo。可能的原因是什么，如何修复，以便我可以启用高DPI，而所有图像大小在运行时与设计时保持相同？
英文:
I have a Form with width 700 and height 500. I put a TImage on it, with Align=alClient and Stretch=True set at design-time.
At run-time, the Image pixels gets blurred. If I set the TImage.Stretch property to False, then at run-time the Image size is shown half of the Form size at the top-left corner. Every Image size gets smaller at run-time than its actual size.
If I disable High DPI then everything works well.
I use Delphi Tokyo. What could be the cause, and how to fix it so I can enable High DPI and all the Image size will remain the same at run-time as at design-time?
答案1
得分: 1
如果您启用了高DPI，您需要提供适当尺寸/分辨率的图像。您已经尝试过的一个选项是TImage的Stretch属性，但这会导致模糊显示。
正确的解决方案是使用包含适当尺寸相同图像的TImageCollection，以及用于显示的TVirtualImage控件。
不幸的是，在Delphi 10.2 Tokyo中，这两个组件都不可用，所以您要么升级到更新版本的Delphi，要么自己处理图像。
英文:
If you enable High DPI, you are responsible for providing images in the proper size/resolution. One option you already tried is the Stretch property of TImage, but that leads to a blurry display.
The correct solution is to use a TImageCollection containing the same image in appropriate sizes, and a TVirtualImage control for the display.
Unfortunately, these two components are not available in Delphi 10.2 Tokyo, so you must either upgrade to a newer version of Delphi, or take care of the image handling yourself.
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