GGL - Grayscale Graphics Library

Overview

GGL (the Gray Graphics Library) provides extended functions for 16-color grayscale graphics on the HP49G+ (and possible HP39G+ and HP48gII) calculators. It complements the abilities of HPG by providing faster and more specialized routines for the 16-color grayscale mode. GGL may be used independently of HPG, or seamlessly alongside it.

The main features of the GGL library are:

• Optimizations for 16-color grayscale drawing
• Fast bitblt routine
• Masked sprites
• Antialiased lines

For a detailed reference of each function see ggl.h