Querying Device Support for MaskBltLast reviewed: November 2, 1995Article ID: Q108929 |
The information in this article applies to:
The Win32 documentation for MaskBlt() states:
Not all devices support the MaskBlt function. An application should call the GetDeviceCaps function to determine whether a device supports this function.To query support for MaskBlt(), an application should query the device for BitBlt support by passing RC_BITBLT constant to GetDeviceCaps(). MaskBlt() implements transparent blts in Windows NT. For more information, please see the following article in the Microsoft Knowledge Base:
ARTICLE-ID: Q89375 TITLE : Transparent Blts in Windows NTGDI implements this application programming interface (API) by calling BitBlt(). Because BitBlt() is implemented at the driver level, applications that calls MaskBlt() should check for BitBlt() support on the device.
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Additional reference words: 3.10 3.50
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