HT_Get8BPPFormatPalette function (winddi.h)

Article
10/13/2021

The HT_Get8BPPFormatPalette function returns a halftone palette for use on standard 8-bits per pixel device types.

Syntax

LONG HT_Get8BPPFormatPalette(
  [out] LPPALETTEENTRY pPaletteEntry,
  [in]  USHORT         RedGamma,
  [in]  USHORT         GreenGamma,
  [in]  USHORT         BlueGamma
);

Parameters

[out] pPaletteEntry

Pointer to an array of PALETTEENTRY structures (described in the Microsoft Windows SDK documentation). When this pointer is not NULL, GDI assumes that it points to valid memory space in which GDI can place the entire 8-bits per pixel halftone palette.

[in] RedGamma

Specifies the red, green, and blue gamma value. This USHORT value is interpreted as a real number whose four least-significant digits are to the right of the (implied) decimal point. For example, a gamma value of 10000 represents the real number 1.0000, and 12345 represents 1.2345. The minimum gamma value allowed is 0.0000, and the maximum allowable value is 6.5535.

[in] GreenGamma

[in] BlueGamma

Return value

If pPaletteEntry is not NULL, the return value is the number of PALETTEENTRY structures that GDI filled in starting at the memory location pointed to by pPaletteEntry. If pPaletteEntry is NULL, the return value is the total count of PALETTEENTRY structures required to store the 8-bits per pixel halftone palette.

Remarks

HT_Get8BPPFormatPalette is a halftone-related GDI service that drivers can use to acquire the system's standard 8-bits per pixel halftone palette.

Requirements

Requirement	Value
Minimum supported client	Available in Windows 2000 and later versions of the Windows operating systems.
Target Platform	Universal
Header	winddi.h (include Winddi.h)
Library	Win32k.lib
DLL	Win32k.sys

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