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Bitmap Functions, Macros, and Data (Windows Embedded CE 6.0)

1/6/2010

The Wxutil.h header file in the DirectShow base classes provides functions and macros to help convert between VIDEOINFOHEADER and BITMAPINFO structures.

Programming element Description

BIT_MASKS_MATCH

Compares the masks of two video images.

BITMASKS

Retrieves a pointer to the array of bitmasks for the specified VIDEOINFOHEADER structure.

COLORS

Retrieves a pointer to an array of RGBQUAD structures that describes the color palette for the specified VIDEOINFOHEADER structure.

DIBSIZE

Calculates the byte size of the specified bitmap

HEADER

Retrieves a pointer to the image data from the specified video image.

MPEG1_SEQUENCE_INFO

Retrieves the sequence header for the specified MPEG-1 video image.

PALETTISED

Checks if the video image's color palette is 8-bit or less.

PALETTE_ENTRIES

Returns the number of colors in the video image's palette.

RESET_MASKS

Clears the specified video image's bitmasks.

RESET_HEADER

Clears the specified video image.

RESET_PALETTE

Clears the specified video image's color palette.

SIZE_EGA_PALETTE

Calculates the size of the EGA (4-bit) color palette.

SIZE_MASKS

Calculates the size of the mask's color palette.

SIZE_MPEG1VIDEOINFO

Calculates the size of the specified MPEG-1 video image.

SIZE_PALETTE

Calculates the size of the 8-bit color palette.

SIZE_PREHEADER

Calculates the byte offset for the video image's bitmap information.

SIZE_VIDEOHEADER

Calculates the size of the video image.

TRUECOLOR

Retrieves a pointer to an array of TRUECOLORINFO structures that describes the bitmasks and color palette for the specified VIDEOINFOHEADER structure.

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

Although similar to the BITMAPINFO structure used in Microsoft Win32® and existing multimedia, VIDEOINFOHEADER also 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

Utility Macros