MFC - 是否有任何方法将png资源加载到对话框中的图片控件? [英] MFC - Is there any way to load a png resource into picture control on a dialog box?

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问题描述

我在OnInitDialog()上尝试了以下代码,但没有显示。

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

正如你所发现的, :: LoadBitmap c $ c> :: LoadImage )只处理 .bmp s。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可以转换为32位ARGB位图(这里是一个名为 AlphaConv 的工具,可以转换它)。然后使用 CImage LoadFromResource 方法加载图像。将 CImage 传递给 m_staticLogo.SetBitmap()

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,如果你真的需要它是 .png ,就可以做到。

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

方法1(更简单的方法):使用 CImage :: Load 从文件加载 .png / code>。将 CImage 传递给 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(更难的方式):通过将资源加载到COM IStream中,从资源加载 .png 并使用 CImage :: Load 。 (注意: CImage :: LoadFromResource 看起来很诱人,但不能使用 .png 图形)。要将资源导入COM IStream ,请参见此Codeproject article 。注意这篇文章适用于 Gdiplus :: Bitmap ,但关键部分是如何创建 IStream ,你应该能够适应 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().

修改更新为使用 CImage ,比 Gdiplus :: Bitmap

这篇关于MFC - 是否有任何方法将png资源加载到对话框中的图片控件?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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