`pdfAddMaskImage`

Attach an explicit stencil/soft-mask buffer (/Mask or

BOOL32 __stdcall pdfAddMaskImage(PPDF IPDF, uint32_t BaseImage, void* Buffer, uint32_t BufSize, int32_t Stride, uint32_t BitsPerPixel, uint32_t Width, uint32_t Height);

Delphi

function pdfAddMaskImage(const IPDF: PPDF; BaseImage: Cardinal; const Buffer: Pointer; BufSize: Cardinal; Stride: Integer; BitsPerPixel, Width, Height: Cardinal): LongBool; stdcall;

Purpose. Attach an explicit stencil/soft-mask buffer (/Mask or /SMask, depending on BitsPerPixel) to an already-inserted base image — for image transparency not already encoded in the base image's own alpha channel.

Parameters.

Parameter	Description
`IPDF`	Document handle.
`BaseImage`	The already-inserted image handle to attach the mask to.
`Buffer`, `BufSize`, `Stride`	Raw mask pixel data and its row stride.
`BitsPerPixel`	`1` = stencil mask (`/Mask`); `8` = soft mask (`/SMask`), per the standard PDF convention.
`Width`, `Height`	Mask dimensions.

Return value. True on success.

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

[return: MarshalAs(UnmanagedType.Bool)]

Area

PDF/A & Conformance