Visible to Intel only — GUID: GUID-E3BB1E0A-5186-475B-9BBA-E5B7300F502B
Visible to Intel only — GUID: GUID-E3BB1E0A-5186-475B-9BBA-E5B7300F502B
AlphaCompColorKey
Performs color keying and alpha composition of two images.
Syntax
IppStatus ippiAlphaCompColorKey_8u_AC4R(const Ipp8u* pSrc1, int src1Step, Ipp8u alpha1, const Ipp8u* pSrc2, int src2Step, Ipp8u alpha2, Ipp8u* pDst, int dstStep, IppiSize roiSize, Ipp8u colorKey[4], IppiAlphaType alphaType);
Include Files
ippi.h
Domain Dependencies
Headers: ippcore.h, ippvm.h, ipps.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib
Parameters
pSrc1, pSrc2 |
Pointer to the source images ROI. |
src1Step, src2Step |
Distances in bytes between starts of consecutive lines in the source images. |
alpha1, alpha2 |
Alpha value. |
pDst |
Pointer to the destination image ROI. |
dstStep |
Distance in bytes between starts of consecutive lines in the destination image. |
roiSize |
Size of the source and destination ROI in pixels. |
colorKey |
Array of color values. |
alphaType |
The type of composition to perform (without pre-multiplying). See Table “Possible Values of alphaType Parameter” for more details. |
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function replaces all areas of the source image pSrc1 containing the specified key color colorKey with the corresponding pixels of the background image pSrc2 and additionally performs alpha composition (see supported Table “Types of Image Compositing Operations”) in accordance with the parameter alphaType. Note the alpha channel in the pDst is not changed after color keying.
The parameter alphaType should not be set to the values intended for operations with pre-multiplying.
Return Values
ippStsNoErr |
Indicates no error. Any other value indicates an error. |
ippStsNullPtrErr |
Indicates an error condition if one of the specified pointers is NULL. |
ippStsSizeErr |
Indicates an error condition if roiSize has a field with a zero or negative value. |
ippStsStepErr |
Indicates an error condition if one of the step values is less than or equal to 0. |
ippStsAlphaTypeErr |
Indicates an error condition if alphaType specifies the unsupported type of composition. |