noun
viewport transformation; viewing transformation
Technical term in computer graphics for mapping coordinates from a window to a viewport. The gloss 'window' is a loose abbreviation.
窓表示域変換は、ウィンドウ座標系からビューポート座標系への写像を指す。
Viewport transformation refers to the mapping from window coordinates to viewport coordinates.
Compound of 窓 (window), 表示域 (display area), and 変換 (transformation), likely a calque from English 'viewport transformation'.