Graphics command stream for calling a display object in a graphics system
First Claim
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1. A graphics system command stream for use in a graphics system to call a display list, the command stream comprising:
- a bit pattern “
01000000”
, followed by a pad, followed by a 25-bit value indicating the address of the display list in memory, followed by a pad, followed by a 25-bit value indicating the size of the display list in 32-byte chunks, wherein upon execution of the command stream the display list is called.
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Abstract
An interface for a graphics system includes simple yet powerful constructs that are easy for an application programmer to use and learn. Features include a unique vertex representation allowing the graphics pipeline to retain vertex state information and to mix indexed and direct vertex values and attributes; a projection matrix value set command; a display list call object command; and an embedded frame buffer clear/set command.
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Citations
4 Claims
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1. A graphics system command stream for use in a graphics system to call a display list, the command stream comprising:
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a bit pattern “
01000000”
, followed bya pad, followed by a 25-bit value indicating the address of the display list in memory, followed by a pad, followed by a 25-bit value indicating the size of the display list in 32-byte chunks, wherein upon execution of the command stream the display list is called.
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2. A computer readable storage medium encoded with executable instructions for calling a display list in memory, comprising:
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a bit pattern “
01000000”
, followed bya bit pattern “
0000000”
, followed bya 25-bit value indicating the address of the display list in memory, followed by a bit pattern “
0000000”
, followed bya 25-bit value indicating the size of the display list in 32-byte chunks, wherein upon execution of the encoded instructions the display list is called.
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3. A graphics command stream decoder comprising:
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a first decoding section decoding a bit pattern “
01000000”
,a second decoding section decoding a bit pattern “
0000000”
,a third decoding section decoding a 25-bit value indicating the address of a display list in memory, a fourth decoding section decoding a bit pattern “
0000000”
,a further decoding section decoding a 25-bit value indicating the size of the display list in 32-byte chunks.
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4. A method of calling a display list in a graphics system using a graphics command stream, the method comprising:
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generating a bit pattern “
01000000”
, thengenerating a bit pattern “
0000000”
, thengenerating a 25-bit value indicating the address of the display list in memory, then generating a bit pattern “
0000000”
, thengenerating a 25-bit value indicating the size of the display list in 32-byte chunks, wherein upon execution of the command stream the display list is called.
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Specification
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Current AssigneeNintendo Company Limited
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Original AssigneeNintendo Company Limited
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InventorsCheng, Howard, Moore, Robert, Parikh, Vimal
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Primary Examiner(s)Chauhan, Ulka J.
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Application NumberUS09/886,047Publication NumberUS 20010043220A1 (withdrawn)Time in Patent Office389 DaysField of Search345/501, 345/503, 345/520, 345/522, 345/553, 345/564, 345/565, 345/567, 709/328, 712/208US Class Current345/522CPC Class CodesA63F 2300/203 Image generating hardwareG06F 12/0875 with dedicated cache, e.g. ...G06T 15/005 General purpose rendering a...G06T 15/04 Texture mappingG06T 2210/32 Image data format
