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CDrawImage::m_bUsingImageAllocator member

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[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 m_bUsingImageAllocator member variable indicates whether the allocator for the pin connection is a CImageAllocator object. If the value is TRUE, the allocator is a CImageAllocator object (or is derived from that class).

Syntax

BOOL m_bUsingImageAllocator;

Remarks

When the value is TRUE, the CDrawImage object can use the GDI BitBlt and StretchBlt functions to render the image, rather than the slower SetDIBitsToDevice and StretchDIBits functions.

Requirements

Requirement Value
Header
Winutil.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

CDrawImage Class

CDrawImage::NotifyAllocator

CDrawImage::UsingImageAllocator