CImageDisplay.CountPrefixBits method
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The CountPrefixBits method calculates the number of zero bits at the start of a specified bit field.
Syntax
DWORD CountPrefixBits(
const DWORD Field
);
Parameters
-
Field
-
Specifies a bit field as a DWORD value.
Return value
Returns the number of zero bits that occur before the first 1 bit, or 0x80000000 if all bits are zero.
Remarks
This method is useful for working with color masks in VIDEOINFO structures.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
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