如何将png资源加载到对话框的图片控件中? [英] How to load a png resource into picture control on a dialog box?

问题描述

我在OnInitDialog()上尝试了以下代码，但未显示任何内容.

I tried the following code on OnInitDialog() but nothing was shown.

m_staticLogo.SetBitmap(::LoadBitmap(NULL, MAKEINTRESOURCE(IDB_LOGO)));

其中m_staticLogo是静态图片控件，IDB_LOGO是png文件的资源ID.

where m_staticLogo is the static picture control and IDB_LOGO is the resource ID of the png file.

推荐答案

正如您所发现的，::LoadBitmap(以及较新的::LoadImage)仅处理.bmp.到目前为止，最简单的解决方案是将图像转换为.bmp.

As you’ve discovered, ::LoadBitmap (and the newer ::LoadImage) only deal with .bmps. By far the easiest solution is to convert your image to a .bmp.

如果图像具有透明度，则可以将其转换为32位ARGB位图(这是一个名为

If the image has transparency, it can be converted into a 32-bit ARGB bitmap (here is a tool called AlphaConv that can convert it). Then load the image using the CImage class LoadFromResource method. Pass the CImage to m_staticLogo.SetBitmap().

但是如果您真的需要它成为.png，则可以完成.

But if you really need it to be a .png, it can be done.

方法1(更简便的方法)::使用CImage::Load从文件中加载.png.将CImage传递到m_staticLogo.SetBitmap().

Method 1 (the easier way): Load the .png from a file using CImage::Load. Pass the CImage to m_staticLogo.SetBitmap().

方法2(较难的方法):通过将资源加载到COM IStream中并使用CImage::Load来从资源加载.png. (注意:CImage::LoadFromResource看起来很吸引人，但不适用于.png图形).要将资源放入COM IStream中，请参见此Codeproject文章 .请注意，本文适用于Gdiplus::Bitmap，但关键部分是如何创建IStream，您应该能够适应CImage.最后，将CImage传递给m_staticLogo.SetBitmap().

Method 2 (the harder way): Load the .png from a resource by loading the resource into a COM IStream and using CImage::Load. (NOTE: CImage::LoadFromResource looks tempting but will not work with a .png graphic). To get the resource into a COM IStream, see this Codeproject article. Note the article works with Gdiplus::Bitmap but the key part is how to create the IStream, which you should be able to adapt for CImage. Finally, pass the CImage to m_staticLogo.SetBitmap().

:已更新为使用CImage，它比Gdiplus::Bitmap容易.

Updated to use CImage, which is easier than Gdiplus::Bitmap.

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