perscanline
Perscanline is a term used to describe processing or rendering that is applied on a per-scanline basis, meaning for each horizontal line of a video frame or raster image. The expression is not standard in formal graphics literature; more common is the broader idea of per-scanline or line-based effects, which are particularly discussed in the context of raster displays and retro hardware.
In CRT and hardware video contexts, a frame is drawn line by line. Perscanline processing allows rendering
Common applications include line-based parallax scrolling, mid-frame palette swaps, sprite multiplexing, and other line-specific adjustments that
Implementation considerations involve precise timing and synchronization with the display, memory layout for per-line state, and