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IDDCX_GAMMARAMP_3X4_COLORSPACE_TRANSFORM structure (iddcx.h)

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The IDDCX_GAMMARAMP_3X4_COLORSPACE_TRANSFORM structure contains a 3x4 color space gamma ramp for a monitor.

Syntax

struct IDDCX_GAMMARAMP_3X4_COLORSPACE_TRANSFORM {
  BOOL      MatrixEnabled;
  float     ColorMatrix3x4[3][4];
  float     ScalarMultiplier;
  BOOL      LutEnabled;
  IDDCX_RGB LookupTable1D[4096];
};

Members

MatrixEnabled

A Boolean value. If set TRUE, ColorMatrix3x4 contains a valid matrix and ScalarMultiplier contains a valid value, both of which should be applied.

ColorMatrix3x4[3]

A 3x3 matrix and 3x1 addition to be applied to each pixel, stored in row-major order. Transforms colors within CIEXYZ.

ScalarMultiplier

A scalar to be multiplied into each element of ColorMatrix3x4.

LutEnabled

A Boolean value. If set TRUE, LookupTable1D contains a valid table that should be applied.

LookupTable1D[4096]

A one-dimensional look-up table of IDDCX_RGB structures that transform colors within the color space specified by IDDCX_PATH2::WireFormatInfo.ColorSpace.

Remarks

The gamma lookup table can contain a 3x4 matrix, a scalar multiplier and a LUT. This value is only specified for console drivers.

For more information about HDR support, see IddCx version 1.10 updates.

Requirements

Requirement Value
Minimum supported client Windows 11, version 22H2 September Update (IddCx version 1.10)
Header iddcx.h

See also

EVT_IDD_CX_MONITOR_SET_GAMMA_RAMP

IDARG_IN_SET_GAMMARAMP

IDDCX_RGB