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Best way to implement a dot-matrix scroller?

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Hi, Does anyone have a good way to implement a dot-matrix scroller? I''ve been considering either creating pictures of each character (using dots) and storing them in a surface, blitting them out onto the screen when needed, or actually making a simulation of a "real" dot-matrix device, in that I send to it an array of bytes (00 for "off", FF for "on") and it "lights" the appropriate dots on the display matrix already on the screen. Which sounds better?

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