Declaration

property PixelAccessMode: TPixelAccessMode read FPixelAccessMode write SetPixelAccessMode default pamSafe;

Description

PixelAccessMode determines how coordinates outside the source bitmap boundaries are handled during sampling operations.

Pixel Access Modes (TPixelAccessMode)

Value	Description
pamUnsafe	Performs direct buffer memory access without boundary checks. Fastest, but sampling outside bitmap dimensions results in access violations or memory corruption.
pamSafe	Clamps out-of-bounds coordinates to valid bitmap boundary pixels. Safe default mode.
pamWrap	Wraps coordinates outside bitmap boundaries tiled/repeating infinitely in both X and Y directions.
pamTransparentEdge	Samples outside bitmap boundaries as fully transparent pixels (clNone32).

Example

// Enable tiled wrapping mode for pattern sampling
Resampler.PixelAccessMode := pamWrap;