![]() |
![]() |
![]() |
function BlendInvertedMask(bgColor, mask: TColor32): TColor32;
A callback function that can be passed as a parameter to the TImage32.CopyBlend method.
This function uses the mask to either preserve or remove the background image. Where ever the mask is fully opaque (alpha = 255), the background image will be erased; and where ever the mask is fully translucent, the background will be preserved.
uses Image32, Image32_PNG; ... img := TImage32.Create; img.LoadFromFile('./lenna.png'); img2 := TImage32.Create; img2.LoadFromFile('./green_blur.png'); img.CopyBlend(img2, img2.Bounds, img.Bounds, BlendInvertedMask); img.SaveToFile('./lenna_erasing.png'); img.Free;
Before:![]() ![]() |
After:![]() |
Copyright ©2019 Angus Johnson - Image32 ver. 1.54 - Documentation last updated on 7-November-2020