The CompositingQuality enumeration specifies whether gamma correction is applied when colors are blended with background colors. This enumeration is used by the GdipGetCompositingQuality and GdipSetCompositingQuality functions.

 

C++ Syntax

 

typedef enum {

CompositingQualityDefault = QualityModeDefault,

CompositingQualityHighSpeed = QualityModeLow,

CompositingQualityHighQuality = QualityModeHigh,

CompositingQualityGammaCorrected,

CompositingQualityAssumeLinear

} CompositingQuality;

 

FreeBASIC 语法

 

enum

CompositingQualityInvalid        = QualityModeInvalid

CompositingQualityDefault        = QualityModeDefault

CompositingQualityHighSpeed      = QualityModeLow

CompositingQualityHighQuality    = QualityModeHigh

CompositingQualityGammaCorrected = 3

CompositingQualityAssumeLinear   = 4

end enum

 

常数

 

CompositingQualityDefault

 

Specifies that gamma correction is not applied.

 

CompositingQualityHighSpeed

 

Specifies that gamma correction is not applied.

 

CompositingQualityHighQuality

 

Specifies that gamma correction is applied.

 

CompositingQualityGammaCorrected

 

Specifies that gamma correction is applied.

 

CompositingQualityAssumeLinear

 

Specifies that gamma correction is not applied.

 

备注

 

When you specify that gamma correction should not be applied, the image data to be rendered (blended with the background) is assumed to be in a linear color space with a gamma value of 1.0. As a result, no gamma adjustment is applied to the image data before or after blending the image with the background.

 

When you specify that gamma correction should be applied, the image data to be rendered (blended with the background) is assumed to be in the sRGB color space with a gamma value of 2.2. To ensure accurate blending, the input image data is transformed into a linear (gamma = 1.0) space before the colors are blended and transformed back into sRGB (gamma = 2.2) space afterward. This mode results in a more accurate blend at the expense of additional processing time.