Graphics display system with graphics window control mechanism
DC CAFCFirst Claim
Patent Images
1. A method of processing graphics images in a display engine for display, the method comprising:
- in a window controller, obtaining data that describes windows in which the graphics images are displayed;
sorting the data using the window controller in accordance with respective depths of the windows;
transmitting header packets from the window controller to the display engine, each header packet containing at least a portion of the data, said portion describing at least one of the windows;
transferring the graphics images from a memory to the display engine responsive to said header packets; and
blending the graphics images using alpha values associated with the graphics images.
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Abstract
A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, a graphics input and an audio input simultaneously. The chip processes graphics images organized as windows. The chip obtains data that describes the windows, sorts the data according to the depth of the window on the display, transfers graphics images from memory, and blends the graphics images using alpha values associated with the graphics images.
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Citations
20 Claims
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1. A method of processing graphics images in a display engine for display, the method comprising:
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in a window controller, obtaining data that describes windows in which the graphics images are displayed; sorting the data using the window controller in accordance with respective depths of the windows; transmitting header packets from the window controller to the display engine, each header packet containing at least a portion of the data, said portion describing at least one of the windows; transferring the graphics images from a memory to the display engine responsive to said header packets; and blending the graphics images using alpha values associated with the graphics images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for processing graphics images, comprising:
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a window controller for obtaining data that describes windows in which the graphics images are displayed, and for sorting the data in accordance with respective depths of the windows; a display engine for blending the graphics images using alpha values associated with the graphics images; and a memory for storing the graphics images, wherein the window controller transmits header packets to the display engine, each header packet containing at least a portion of the data, said portion describing at least one of the windows, and wherein the graphics images are transferred from the memory to the display engine responsive to said header packets. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification