公开(公告)号：GB2228596A

公开(公告)日：1990-08-29

申请号：GB8904412

申请日：1989-02-27

Applicant: IBM

Inventor： WEST RODERICK MICHAEL PETERS ,  BUTLER NICHOLAS DAVID ,  SIDOLI PAOLI GERARDO ,  LARKY STEVEN PHILIP ,  BUTTIMER MALCOLM DOUGLAS ,  HOMEWOOD BRIAN CLIVE

IPC: G06F9/46 ,  G06F9/48 ,  G06F11/14

公开(公告)号：BR8901841A

公开(公告)日：1989-11-28

申请号：BR8901841

申请日：1989-04-19

Applicant: IBM

Inventor： GUPTA SATISH ,  LARKY STEVEN PHILIP ,  PEEVERS ALAN WESLEY ,  CLAIR JOE CHRISTOPHER ST

IPC: G09G1/02 ,  G06F3/153 ,  G06F12/08 ,  G06F12/10 ,  G09G5/00 ,  G09G5/14 ,  G09G5/36 ,  G09G5/39 ,  G06F3/00

Abstract: A display control means such as a virtual display adapter (110) allows the advanced functions of a display controller to be utilized in a large area of memory in addition to the normal use in display memory (120). This large area of memory includes system memory (130), and efficient access to this large area of memory is permitted for normal system use. The display controller also functions with non-contiguous and non-resident bitmaps. The flexibility of demand-paged virtual memory is utilized for display tasks, as display bitmaps may be written to the large area of memory as well as the display memory.

公开(公告)号：DE69132041T2

公开(公告)日：2000-09-14

申请号：DE69132041

申请日：1991-09-30

Applicant: IBM

Inventor： JOHNSON JR LEE EDWARD ,  KOKOSZKA DARYL JOHN ,  LARKY STEVEN PHILIP ,  SIDOLI PAOLO

IPC: G06F3/153 ,  G06T11/20 ,  G06T15/00 ,  G06T15/80 ,  G06T15/50

公开(公告)号：DE69108442T2

公开(公告)日：1995-10-05

申请号：DE69108442

申请日：1991-04-15

Applicant: IBM

Inventor： LARKY STEVEN PHILIP ,  PEEVERS ALAN WESLEY ,  ST CLAIR JOE CHRISTOPHER

IPC: H04N1/407 ,  G06T5/00 ,  G09G5/14 ,  G09G5/39 ,  G09G5/393 ,  G09G1/16

公开(公告)号：ES2060684T3

公开(公告)日：1994-12-01

申请号：ES89106573

申请日：1989-04-13

Applicant: IBM

Inventor： GUPTA SATISH ,  LARKY STEVEN PHILIP ,  PEEVERS ALAN WESLEY ,  ST CLAIR JOE CHRISTOPHER

IPC: G09G1/02 ,  G06F3/153 ,  G06F12/08 ,  G06F12/10 ,  G09G5/00 ,  G09G5/14 ,  G09G5/36 ,  G09G5/39 ,  G09G1/16 ,  G09G1/00

Abstract: A display control means such as a virtual display adapter (110) allows the advanced functions of a display controller to be utilized in a large area of memory in addition to the normal use in display memory (120). This large area of memory includes system memory (130), and efficient access to this large area of memory is permitted for normal system use. The display controller also functions with non-contiguous and non-resident bitmaps. The flexibility of demand-paged virtual memory is utilized for display tasks, as display bitmaps may be written to the large area of memory as well as the display memory.

公开(公告)号：ZA918049B

公开(公告)日：1992-07-29

申请号：ZA918049

申请日：1991-10-08

Applicant: IBM

Inventor： BRASE DEBORAH DIANE ,  DEBORAH DIANE BRASE ,  LARKY STEVEN PHILIP ,  STEVEN PHILIP LARKY ,  CLAIR JOE CHRISTOPHER ST ,  JOE CHRISTOPHER ST CLAIR ,  SIDOLI PAOLO ,  PAOLO SIDOLI

IPC: G06F3/153 ,  G06F3/033 ,  G06F3/048 ,  G06T1/60 ,  G06T11/80 ,  G06T15/30 ,  G09G5/36 ,  G09G

Abstract: In a system and process for picking three dimensional objects from images depicted on a video display the displayed objects are selectively rerendered. During such rerendering the object pixels are compared in depth to the data in a Z buffer 9 for determining visibility. The number and size of the objects subject to rerendering by the rasterization processor 2 is constrained by using the front end graphics processor 1 to define object extents and by rerendering only extents which have been clipped to the boundaries of the pick window. The rerendering operation does not alter the three dimensional graphics image stored in and repetitively scanned from the frame buffer 3. Selection between multiple objects within the pick window can include a weighted comparison using a pick plane memory 20 to store visibility data by object.