Bitmap Functions

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Windows Embedded CE 6.0 R3

4/8/2010

The Wxutil.h header file in the DirectShow base classes provides functions and macros to help convert between VIDEOINFOHEADERand BITMAPINFOstructures.

Programming element	Description
ContainsPalette	Checks if the video image contains a color palette.
GetBitCount	Finds the number of bits per pixel.
GetBitmapFormatSize	Finds the size (in bytes) needed to build a VIDEOINFOHEADERstructure and related data.
GetBitmapPalette	Finds the first palette entry in a VIDEOINFOHEADERstructure.
GetBitmapSize	Finds the size (in bytes) needed to hold an image.
GetBitmapSubtype	Finds the GUID subtype for a given bitmap info header structure.
GetSubtypeName	Finds the (debug) name for a given GUID subtype.
GetTrueColorType	Finds the GUID subtype for a given bitmap header.

These functions are made available to help manage VIDEOINFOHEADERstructures, which are used throughout DirectShow to describe video data streams.

Although similar to the BITMAPINFOstructure used in Microsoft® Win32® and existing multimedia, VIDEOINFOHEADERalso adds some new video-specific fields.

Global data	Description
bits555	Array of color bitmasks for an RGB 555 bitmap.
bits565	Array of color bitmasks for an RGB 565 bitmap.
bits888	Array of color bitmasks for an RGB 24-bit bitmap.

See Also

Reference