Declaration

TByteMap = class(TCustomMap)

Description

TByteMap is a 2D array container for 8-bit unsigned byte values (Byte), inheriting from TCustomMap.
It is commonly used for grayscale images, alpha channels, stencil masks, heightmaps, and weight maps.

Features & Capabilities

• Bitmap Conversion:
  • ReadFrom: Extracts color channels ($R,G,B,A$, uniform RGB, or weighted intensity) from a TCustomBitmap32.
  • WriteTo: Converts byte values back into bitmap pixels or applies a 256-color palette (TPalette32).
• Drawing & Blending:
  • DrawTo: Blends byte map data onto a destination TCustomBitmap32 as alpha modulation for a target color (TColor32).
• Arithmetic:
  • Add, Sub, Multiply: Performs saturated per-pixel scalar arithmetic operations on byte buffer elements.
• Transformation & Resampling:
  • FlipHorz, FlipVert, Rotate90, Rotate180, Rotate270: Performs spatial orientation flips and 90-degree step rotations.
  • Downsample: Box-filters and downsamples byte map dimensions by integer scaling factors ($2\times ,3\times ,4\times$, up to $32\times$).