淡化Delphi中的Alpha混合PNG格式 [英] Fade in an alpha-blended PNG form in Delphi

问题描述

几年前，当Vista首次发布时，我曾经问过一个关于这个问题的问题，但是从来没有解决过这个问题，而是把它搁置在后面。

我有一个启动画面，我非常努力，使看起来不错。这是一个32bpp的alpha混合PNG。我有一些代码（如果需要，我可以挖掘），在Windows XP或Vista +下，当桌面组合关闭时，它的效果非常好。然而，在Vista +下，所有的透明部分都是黑色的，摧毁了所有看起来很棒的东西！

所以，我的问题是这样的：任何人都可以显示一个32bpp alpha混合PNG作为启动屏幕，以启用桌面组合的方式起作用。我不反对使用第三方组件，如果需要，免费或其他方式。

理想情况下，这将适用于Delphi 7。

更新：除了下面的答案，哪个工作得很好，我发现TMS TAdvSmoothSplashScreen组件也很好地处理这个任务，如果稍微复杂一些。

解决方案

Tim，我刚刚在Vista / D2007上尝试使用'Windows Classic'主题：

Alpha混合闪屏在Delphi中 - 第2部分
http://melander.dk/articles/alphasplash2/2/

没有黑色的背景，我可以看到...仍然看起来不错。

I asked a question about this some years back when Vista was first released, but never resolved the problem and shelved it as something to consider later.

I have a splash screen that I went to great effort to make look great. It's a 32bpp alpha-blended PNG. I have some code (which I can dig up if required!) that works great under Windows XP or under Vista+ when desktop composition is turned off. However, under Vista+ all the transparent parts are black, destroying everything that looks great about it!

So, my question is this: as anyone been able to display a 32bpp alpha-blended PNG as a splash screen in a way that works both with and without desktop composition activated? I'm not adverse to using third-party components if required, free or otherwise.

Ideally, this would work in Delphi 7.

Update: Besides the answers below, which work very well, I found that the TMS TAdvSmoothSplashScreen component also handles this task very well, if somewhat more complex.

解决方案

Tim, I just tried this on Vista/D2007 with 'Windows Classic' theme selected:

Alpha Blended Splash Screen in Delphi - Part 2 http://melander.dk/articles/alphasplash2/2/

no black background that I could see... it still looks great.

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