32 bit BMP not shown as expected

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32 bit BMP not shown as expected

Post by HansS » Sun Oct 02, 2011 7:55 pm

32 bit BMP files (like 10_M.bmp in the screen shot), e.g. generated from my scanner, are displayed by XnView with "greyness". Windows explorer, Windows picture viewer, Picasa and IrfanView (etc.?) display the pictures with correct colour, but XnView (and Gimp) with greyness.

I don't know if it's a XnView error, or error of Windows, but even if it's a Windows error I strongly suggest to provide some fix in XnView (e.g. add an option to reduce 32 bit BMP to 24 bit for display). If I open such file and store it as BMP in IrfanView, a 24 bit BMP is generated, which is displayed correct by XnView (like 10_M_Irfan.bmp in the screen shot).

In the screen shot you see on the left the display of Windows explorer, on right XnView:

XnView 1.98.2, Win7-64Ult SP1

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Re: 32 bit BMP not shown as expected

Post by xnview » Mon Oct 03, 2011 8:00 am

Your bmp has certainly a bad alpha channel, you can disable the use of alpha View>Use alpha

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