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CImageDisplay Class

 
Microsoft DirectShow 9.0

CImageDisplay Class

CImageDisplayClassHierarchy

The CImageDisplay class is a helper class for GDI video renderers to manage the display format. The object stores a VIDEOINFO structure that describes the current display mode, which is initialized in the object's constructor method. The object's CheckMediaType method checks whether a proposed media type can be rendered efficiently using GDI.

Requirements

**  Header:** Declared in Winutil.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

Protected Member Variables Description
m_Display VIDEOINFO structure that describes the current display format.
Protected Methods  
CheckBitFields Validates the color masks in a VIDEOINFO structure.
CountPrefixBits Calculates the number of zero bits at the start of a specified bit field.
CountSetBits Returns the number of bits set to 1 in a specified bit field.
Public Methods  
CheckHeaderValidity Validates a BITMAPINFOHEADER structure.
CheckMediaType Determines whether a proposed media type is compatible with the display format.
CheckPaletteHeader Validates the palette entries in a VIDEOINFO structure.
CheckVideoType Checks whether a specified VIDEOINFO format is compatible with the display format.
CImageDisplay Constructor method.
GetBitMasks Retrieves the color masks for a specified VIDEOINFO format.
GetColourMask Retrieves the color masks for the current display format.
GetDisplayDepth Retrieves the bit depth of the current display mode.
GetDisplayFormat Retrieves a video format that describes the current display mode.
IsPalettised Retermines whether the current display format is palettized.
RefreshDisplayType Updates the object's video format to match the specified display

See Also

CDrawImage Class