Function Reference
FFKeepChangesChange a SnapShot so that it keeps only the pixels that are different from another SnapShot.
FFKeepChanges ( NoSnapShot1, NoSnapShot2 [, ShadeVariation] )
Parameters
NoSnapShot1 | The "slot" number of the SnapShot to change. |
NoSnapShot2 | The "slot" number of the SnapShot to compare against. |
ShadeVariation | [optional] A number between 0 and 255 to indicate the allowed number of shades of variation of the red, green, and blue components of the colour. Default is 0 (exact match). |
Return Value
Success: | Returns 1 |
Failure: | Returns 0 and sets @ERROR |
Remarks
The first SnapShot will be modified when this function is called, changing pixels that are the same in both SnapShots to black. The second SnapShot is kept unchanged.
Related
FFSnapShot, FFIsDifferent, FFLocalizeChanges, FFKeepColor, FFDrawSnapShot