Display system having extended raster operation circuitry
First Claim
1. A display system comprising:
- a frame buffer for storing information representing one or more images, said information being organized into a plurality of memory planes;
a display device for visually displaying images stored in said frame buffer;
an extended raster operation circuit for performing logical operations on information in the frame buffer and for storing the results of the logical operations in the frame buffer; and
a controller for controlling the extended raster operation circuit;
characterized in that the extended raster operation circuit comprises;
an intraplane operation unit for performing intraplane logical operations specified by the controller on information in the frame buffer, each intraplane logical operation having at least one input operand and at least one output result, all operands and results of a given intraplane logical operation being in a single memory plane; and
an interplane operation unit for performing interplane logical operations specified by the controller on the results of the intraplane logical operations, each interplane logical operation having at least one input operand and at least one output result, the operands and results of a given interplane logical operation being in at least two memory planes.
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Accused Products
Abstract
A display system having a frame buffer comprising a plurality of memory planes, a display device for visually displaying images written into the frame buffer, and a controller for controlling image data operations. The display system is provided with an extended raster operation circuitry comprising an intraplane operation unit and an interplane operation unit. Operation results of the circuitry are written back to the frame buffer. The respective operation units perform operations specified by the controller. The intraplane operation unit performs operations on image data in each of the memory planes, separately, while the interplane operation unit performs operations on image data in at least two memory planes selected by the controller. There are no restrictions as to the positional relation between the intraplane operation unit and the interplane operation unit.
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Citations
8 Claims
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1. A display system comprising:
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a frame buffer for storing information representing one or more images, said information being organized into a plurality of memory planes; a display device for visually displaying images stored in said frame buffer; an extended raster operation circuit for performing logical operations on information in the frame buffer and for storing the results of the logical operations in the frame buffer; and a controller for controlling the extended raster operation circuit; characterized in that the extended raster operation circuit comprises; an intraplane operation unit for performing intraplane logical operations specified by the controller on information in the frame buffer, each intraplane logical operation having at least one input operand and at least one output result, all operands and results of a given intraplane logical operation being in a single memory plane; and an interplane operation unit for performing interplane logical operations specified by the controller on the results of the intraplane logical operations, each interplane logical operation having at least one input operand and at least one output result, the operands and results of a given interplane logical operation being in at least two memory planes. - View Dependent Claims (2, 3, 4)
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5. A display system comprising:
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a frame buffer for storing information representing one or more images, said information being organized into a plurality of memory planes; a display device for visually displaying images stored in said frame buffer; an extended raster operation circuit for performing logical operations on information in the frame buffer and for storing the results of the logical operations in the frame buffer; and a controller for controlling the extended raster operation circuit; characterized in that the extended raster operation circuit comprises; an interplane operation unit for performing logical operations specified by the controller on the information in the frame buffer, each interplane logical operation having at least one input operand and at least one output result, the operands and results of a given interplane logical operation being in at least two memory planes; and an intraplane operation unit for performing logical operations specified by the controller on the results of the interplane operation unit, each intraplane logical operation having at least one input operand and at least one output result, all operands and results of a given intraplane logical operation being in a single memory plane. - View Dependent Claims (6, 7, 8)
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Specification