Raster Image Functions: Image Processing Using the Alpha Channel

L_BitmapHasMeaningfulAlpha

L_CreateMaskFromBitmapRgn

L_GetBitmapAlpha

L_SetBitmapAlpha

L_SetBitmapRgnFromMask

Help Version 19.0.2017.10.27
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LEADTOOLS Raster Imaging C API Help
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LEADTOOLS Raster Imaging Features
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