Image Generation Library

Hi to all, I need to create web pages containing images which should be updated periodically, but the image contents may vary as data coming from a database varies. What is that?, well the image will contain dynamic objects and static objects. The dynamic objects can be text (representing database data) and lines, where you can change attributes like color, position, etc. The static objects can be filled ellipses, circles, lines, static text. The image format can be a jpeg, gif or another type supported on html. Does somebody know some Library with functions for create such above images? Does somebody know some links to find something? I will apprecciate your attention to this. When you come to Mexico and Guadalajara City I will pay your help inviting you a bunch of Mexican Tacos. Atte. Ignacio Estrada F. Centro Nacional de Control de Energia Area de Control Occidental 025+6463, 025+6464, 025+646