The COLORADJUSTMENT structure defines the color adjustment values used by the StretchBlt and StretchDIBits functions when the stretch mode is HALFTONE.
typedef struct tagCOLORADJUSTMENT { // ca WORD caSize; WORD caFlags; WORD caIlluminantIndex; WORD caRedGamma; WORD caGreenGamma; WORD caBlueGamma; WORD caReferenceBlack; WORD caReferenceWhite; SHORT caContrast; SHORT caBrightness; SHORT caColorfulness; SHORT caRedGreenTint; } COLORADJUSTMENT;
Value |
Meaning |
CA_NEGATIVE |
Specifies that the negative of the original image should be displayed. |
CA_LOG_FILTER |
Specifies that a logarithmic function should be applied to the final density of the output colors. This will increase the color contrast when the luminance is low. |
Value |
Meaning |
ILLUMINANT_DEVICE_DEFAULT |
Device’s default. Standard used by output devices. |
ILLUMINANT_A |
Tungsten lamp. |
ILLUMINANT_B |
Noon sunlight. |
ILLUMINANT_C |
NTSC daylight. |
ILLUMINANT_D50 |
Normal print. |
ILLUMINANT_D55 |
Bond paper print. |
ILLUMINANT_D65 |
Standard daylight. Standard for CRTs and pictures. |
ILLUMINANT_D75 |
Northern daylight. |
ILLUMINANT_F2 |
Cool white lamp |
ILLUMINANT_TUNGSTEN |
Same as ILLUMINANT_A. |
ILLUMINANT_DAYLIGHT |
Same as ILLUMINANT_C. |
ILLUMINANT_FLUORESCENT |
Same as ILLUMINANT_F2. |
ILLUMINANT_NTSC |
Same as ILLUMINANT_C. |
SetStretchBltMode, StretchBlt, StretchDIBits
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