Three-dimensional computer graphic apparatus with designated processing order in pipeline processing

A three-dimensional computer graphic apparatus which processes graphic data, comprising:

• a central processing unit functioning as a graphic data managing unit;
• a plurality of processor modules operatively connected to the central processing unit and each performing geometric conversion and a pre-drawing process on the graphic data and, further, outputting a synchronizing command;
• a distributor operatively connected to the processor modules;
• a plurality of drawing processors operatively connected to the distributor and each performing a drawing process based on the graphic data;
• and
• a monitor, operatively connected to the drawing processors, displaying the graphic data;
• said distributor further comprising:
• a plurality of input first-in first-out buffers, each connected to a corresponding processor module, sequentially storing data comprising graphic data and a synchronizing command, both output from the processor module,
• a plurality of output first-in first-out buffers, each connected to a corresponding drawing processor, sequentially storing the graphic data, and
• selection distributing means, provided between the input FIFOs and output FIFOs, for selecting the data from one of the input FIFOS, outputting the graphic data to the output FIFO when the selected data represents the graphic data, prohibiting selection of the data from a corresponding input FIFO after the above selection when the selected data represents the synchronizing command, and releasing prohibition of selection by the synchronizing command when all input FIFOs enter a state in which selection is prohibited.