Polymorphic graphic device

• US 5,394,523 A
• Filed: 01/22/1993
• Issued: 02/28/1995
• Est. Priority Date: 01/22/1993
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Taligent, Inc. (HP Inc.)
• Inventors: Harris, Jerry G.
• Primary Examiner(s): Powell, Mark R.
• Assistant Examiner(s): Tung, Kee M.
• Application Number:
  US08/007,992
• Time in Patent Office: 767 Days
• Field of Search: 395/162-164, 395/600, 395/650, 395/131, 395/109, 364/200 MS File, 364/900 MS File, 345/22, 345/24, 345/133, 345/150, 345/156, 345/186
• US Class Current: 345/501
• CPC Class Codes: G06F 15/00 Digital computers in general details G06F1/00 – G06F13/00; Data processing equipment in general
• CPC Class Codes: G06T 15/00 3D [Three Dimensional] image rendering

Abstract

A method and apparatus providing a polymorphic pixel buffer. An object-oriented system design provides a robust and extensible pixel specification which allows for new methods, data types, and operation to be added to a digital pixel representation and processing system.

Claims

1. An apparatus for polymorphically managing pixel data comprising:

an object-oriented operating system for interfacing with a user;

a data processor controlled by the operating system;

display device controlled by the data processor for displaying a plurality of pixels to form a graphic image, each of the plurality of pixels having pixel data for controlling the display device to display an appearance for each of the plurality of pixels;

storage means with a plurality of locations for storing the pixel data;

an array having cells representing a plurality of pixels which display in a contiguous region on the display device;

a reference to selected ones of the plurality of locations, the selected ones corresponding to pixels represented by the array;

an attribute stored in the storage means and specifying an encoding format for display on the display device and applicable to each of the pixels represented by the array; and

means responsive to the stored attribute for creating a painter object which modifies pixel data in the selected ones of the plurality of locations in order to change the appearance of the plurality of pixels in a predetermined manner based on the stored attribute.

2. The apparatus of claim 1 including means controlled by the user for querying,the storage means to retrieve the stored attribute.

3. The apparatus of claim 1 including object editing means controlled by the user for adding additional pixel data attributes into the storage means.

4. The apparatus of claim 3 further comprising means controlled by the user and created by the painter object creation means in response to the attribute for manipulating pixel data in a subset of the selected ones of the plurality of locations in accordance with a predetermined process.

5. The apparatus of claim 3 further comprising means controlled by the user and created by the painter object creation means in response to the attribute for retrieving pixel data from only one of the selected ones of the plurality of locations.

6. The apparatus of claim 3 further comprising means controlled by the user and created by the painter object creation means in response to the attribute for manipulating pixel data in only one of the selected ones of the plurality of locations in accordance with a predetermined process.

7. The apparatus of claim 3 further comprising means controlled by the user and created by the painter object creation means in response to the attribute for moving pixel data in a contiguous block of selected ones of the plurality of locations from one set of said plurality of storage locations to another set of the plurality of storage locations.

8. The apparatus of claim 3 further comprising means controlled by the user and created by the painter object creation means in response to the attribute for copying pixel data in a contiguous block of selected ones of the plurality of locations from one set of said plurality of storage locations to another set of the plurality of storage locations.

9. The apparatus of claim 3 further comprising means controlled by the user and created by the painter object creation means in response to the attribute for storing a copy of the plurality of locations in the storage means.

10. The apparatus of claim 3 wherein the apparatus further comprises an additional storage means and means controlled by the user and created by the painter object creation means in response to the attribute for transferring pixel data from the storage means to the additional storage means.

11. The apparatus of claim 3 wherein the additional pixel data attributes include an active boundary attribute which specifies a subset of the array which can be changed.

12. The apparatus of claim 11 wherein the additional pixel data attributes include a reference resolution specification indicating a number of pixels included in the array.

13. The apparatus of claim 11 wherein the additional data attributes includes a reference orientation indicating a rotation to be applied to the array.

14. The apparatus of claim 3 wherein the additional data attributes includes transformation means for assigning a location in continuous coordinates to one of the array cells.

15. The apparatus of claim 3 further comprising a colormetric characterization object containing a plurality of color specifications and a method for assigning one of the plurality of color specifications to each of the array cells.

17. The method of claim 1 including the step of:

F. retrieving the stored attribute from the storage means.

18. The method of claim 1 including the step of:

G. storing additional pixel data attributes into the storage means.

19. The method of claim 18 wherein step G comprises the step of:

G1. adding an active boundary attribute which specifies a subset of the array which can be changed.

20. The method of claim 18 wherein step G comprises the step of:

G2. adding a reference resolution specification indicating a number of pixels included in the array.

21. The method of claim 18 wherein step G comprises the step of:

G3. adding a reference orientation indicating a rotation to be applied to the array.

22. The method of claim 18 wherein step G comprises the step of:

G4. assigning a location in continuous coordinates to one of the array cells.

23. The method of claim 18 wherein step E comprises the step of:

E8. creating a colormetric characterization object containing a plurality of color specifications; and

E9. assigning one of the plurality of color specifications to each of the array cells.

24. The method of claim 1 wherein step E comprises the step of:

E1. manipulating pixel data in a subset of the selected ones of the plurality of locations in accordance with a predetermined process in response to the selected attribute.

25. The method of claim 1 wherein step E further comprises the step of:

E2. retrieving pixel data from only one of the selected ones of the plurality of locations in response to the selected attribute.

26. The method of claim 1 wherein step E further comprises the step of:

E3. manipulating pixel data in only one of the selected ones of the plurality of locations in accordance with a predetermined process in response to the selected attribute.

27. The method of claim 1 wherein step E further comprises the step of:

E4. moving pixel data in a contiguous block of selected ones of the plurality of locations from one set of said plurality of storage locations to another set of the plurality of storage locations in response to the selected attribute.

28. The method of claim 1 wherein step E further comprises the step of:

E5. copying pixel data in a contiguous block of selected ones of the plurality of locations from one set of said plurality of storage locations to another set of the plurality of storage locations in response to the selected attribute.

29. The method of claim 1 wherein step E further comprises the step of:

E6. storing a copy of the plurality of locations in the storage means in response to the selected attribute.

30. The method of claim 1 wherein the computer apparatus further comprises an additional storage means and the method further comprises the step of:

E7. transferring pixel data from the storage means to the additional storage means in response to the selected attribute.

16. In a computer system having an object-oriented operating system for interfacing with a user, a data processor controlled by the operating system, a display device controlled by the data processor for displaying a plurality of pixels to form a graphic image, each of the plurality of pixels having pixel data for controlling the display device to display an appearance for each of the plurality of pixels and storage means with a plurality of locations for storing the pixel data, a method for polymorphically managing the pixel data, the method comprising the steps of:

A. creating an array with cells representing a plurality of pixels which display in a contiguous region on the display device;

B. creating a reference between the array cells and selected ones of the plurality of locations, the selected ones corresponding to pixels represented by the array;

C. selecting an attribute from a plurality of attributes and storing the selected attribute, each attribute specifying an encoding format for displaying each of the pixels represented by the array on the display device;

D. modifying pixel data in the selected ones of the plurality of locations in order to change the appearance of the plurality of pixels in a predetermined manner and in response to the attribute selected in step C; and

E. creating a polymorphic painter object which modifies pixel data in response to the color attribute selected in step C.