DDCOLORCONTROL

The DDCOLORCONTROL structure defines the color controls associated with a DirectDrawVideoPortObject, an overlay surface, or a primary surface.

typedef struct _DDCOLORCONTROL {
    DWORD   dwSize;
    DWORD   dwFlags;
    LONG    lBrightness;
    LONG    lContrast;
    LONG    lHue;
    LONG    lSaturation;
    LONG    lSharpness;
    LONG    lGamma;
    LONG    lColorEnable;
    DWORD   dwReserved1;
} DDCOLORCONTROL, FAR *LPDDCOLORCONTROL;
 

Members

dwSize

The the size of the structure, in bytes. This member must be initialized before use.

dwFlags

Flags specifying which structure members contain valid data . When the structure is returned by the IDirectDrawColorControl::GetColorControls method, it also indicates which options are supported by the device.

DDCOLOR_BRIGHTNESS	The iBrightness member contains valid data.
DDCOLOR_CONTRAST	The iContrast member contains valid data.
DDCOLOR_COLORENABLE	The lColorEnable member contains valid data.
DDCOLOR_GAMMA	The iGamma member contains valid data.
DDCOLOR_HUE	The iHue member contains valid data.
DDCOLOR_SATURATION	The iSaturation member contains valid data.
DDCOLOR_SHARPNESS	The iSharpness member contains valid data.

lBrightness

Luminance intensity (Black Level) in IRE units*100. Range is 0 to 10,000. The default is 750 (7.5 IRE)

lContrast

Relative difference between higher and lower intensity luminance values in IRE units*100. The valid range is 0 to 20,000. The default value is 10,000 (100 IRE). Higher values of contrast cause darker luminance values to tend towards black, and cause lighter luminance values to tend towards white. Lower values of contrast cause all luminance values to move towards the middle luminance values.

lHue

Phase relationship of the chrominance components. Hue is specified in degrees and the valid range is -180 to 180. The default is 0.

lSaturation

Color intensity in IRE units*100. The valid range is 0 to 20,000. The default value is 10,000 (100 IRE).

lSharpness

Sharpness in arbitrary units. The valid range is 0 to 10. The default value is 5.

lGamma

Controls the amount of gamma correction applied to the luminance values. The valid range is 1 to 500 gamma units, with a default of 1.

lColorEnable

Flag indicating whether color is used. If this member is zero, color is not used; if it is 1, then color is used. The default value is 1.

dwReserved1

This member is reserved.

QuickInfo

  Windows NT: Use version 5.0 or later.
  Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
  Windows CE: Unsupported.
  Header: Declared in ddraw.h.