QuickDraw GX was a replacement for the QuickDraw (QD) 2D graphics engine and Printing Manager inside the classic Mac OS. Its underlying drawing platform was an object oriented, resolution-independent, retained mode system, making it much easier for programmers to perform common tasks (compared to the original QuickDraw). Additionally, GX added various curve-drawing commands that had been lacking from QD, as well as introducing TrueType as its basic font system.
QuickDraw GX was a replacement for the QuickDraw (QD) 2D graphics engine and Printing Manager inside the classic Mac OS. Its underlying drawing platform was an object oriented, resolution-independent, retained mode system, making it much easier for programmers to perform common tasks (compared to the original QuickDraw). Additionally, GX added various curve-drawing commands that had been lacking from QD, as well as introducing TrueType as its basic font system.
Source: Wikipedia "QuickDraw GX" · CC BY-SA 4.0
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