# image/pixel-write Copy RGBA bytes into a pixel buffer in place, optionally at a byte offset, keeping the pixel pointer stable. CPU-only and thread-safe. ## Syntax

[image/pixel-write $buffer $bytes ?offset]

## Parameters - `$buffer` — `PixelBuffer` from `image/pixel-buffer` or `image/load` - `$bytes` — binary-safe string (e.g. from `ffi/read-bytes` or a worker stream) - `offset` — byte offset into the pixel data (optional, default 0) ## Examples

set buf [image/pixel-buffer 320 240]
[image/pixel-write $buf $rgba-bytes]   # whole frame
[image/pixel-write $buf $patch 4096]   # sub-rect starting at byte 4096

## Returns bool — true when the bytes fit (`offset + len(bytes) <= width * height * 4`); false for a non-PixelBuffer, non-string bytes, or overflow. No error value is returned. ## See Also `image/pixel-buffer`, `image/load`, `image/dims`, `draw/image`