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XLATEOBJ (Windows CE 5.0)

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This structure is used to translate color indexes from one palette to another.

typedef struct _XLATEOBJ {  ULONG iUniq;  FLONG flXlate;  USHORT iSrcType;  USHORT iDstType;  ULONG cEntries;  ULONG* pulXlate;} XLATEOBJ;

Members

  • iUniq
    A cache identifier that enables the driver to recognize an XLATEOBJ structure that it has previously cached. If this member is zero, the driver should not cache the XLATEOBJ structure.
  • flXlate
    Flags specifying hints about the translation. This member can be any combination of flags shown in the following table.
    Flag Description
    XO_TABLE A table is provided to translate source indices to target indices.
    XO_TO_MONO Source indices are translated to a monochrome format with the special property that all indices map to zero, except for one. A driver can use this to accelerate a block transfer.
    XO_TRIVIAL Source indices are usable as target indices.
    XO_DEVICE_ICM Not supported.
    XO_FROM_CMYK Not supported.
    XO_HOST_ICM Not supported.
  • iSrcType
    Obsolete. Use XLATEOBJ_cGetPalette to query the source format.
  • iDstType
    Obsolete. Use XLATEOBJ_cGetPalette to query the destination format.
  • cEntries
    Specifies the number of entries in the array pointed to by the pulXlate member. Indexing into pulXlate with a value greater than cEntries results in a memory access violation.
  • pulXlate
    Pointer to an array of translation entries.

Remarks

The destination palette always belongs to the destination surface of some drawing operation. The source palette is an application-selected palette or a palette from another surface.

The XLATEOBJ structure is used to translate color indices that refer to the source palette to indices for the destination palette. The resulting index identifies a color that matches the source color as closely as possible.

Requirements

OS Versions: Windows CE 1.0 and later.
Header: Winddi.h.

See Also

Display Driver Structures

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