Code generator for printer driver

• US 6,449,050 B1
• Filed: 10/05/1998
• Issued: 09/10/2002
• Est. Priority Date: 10/05/1998
• Status: Expired due to Term

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Haikin, John S.
• Primary Examiner(s): Wallerson, Mark
• Application Number:
  US09/165,736
• Time in Patent Office: 1,436 Days
• Field of Search: 358/1.1, 358/1.5, 358/1.12, 358/1.13, 358/1.14, 358/1.15, 358/1.16, 358/1.17, 358/1.18, 341/20, 341/22
• US Class Current: 358/1.1
• CPC Class Codes: G06F 8/71 Version control security arrangements therefor G06F21/57; Configuration management

Abstract

A code generator together with a pre-compiled library of proprietary printer functions having entry points accessible by a link editor. The code generator obtains design parameters for a printer driver, the design parameters including parameters relating to input functionality, output functionality, user interface functionality, and print data processing functionality. In addition, the code generator obtains a pointer to a printer port function that interfaces directly to a printer port. Preferably, the code generator also obtains an other pointer to an other function that uses a port or an operating system function to access a system resource. Thereafter, the code generator generates source code in a high-level language such as C or C++, with the source code implementing the design parameters by including calls to appropriate ones of the functions in the pre-compiled library, and by including a call to the system function such as a printer port function that causes printer data to be output to the printer port. The source code also preferably includes a call to the other function that accesses the system resource. Thereafter, the generated source code may be compiled by a standard compiler into a compiled object, and the compiled object can be linked by a link editor with the pre-compiled library of functions, so as to yield an executable which implements desired printer functionality.

Claims

1. A method for generating source code in a code generator having a pre-compiled library of proprietary printer functions having entry points accessible by a link editor, said method comprising the steps of:

obtaining design parameters for a printer driver, said design parameters including parameters relating to input functionality, output functionality, user interface functionality, and print data processing functionality;

obtaining a pointer to a printer port function that interfaces directly to a printer port; and

generating source code in a high-level language, with the source code implementing the design parameters using appropriate ones of the functions in the pre-compiled library, and by using the printer port function;

whereby the generated source code may be compiled by a standard compiler into a compiled object, and the compiled object can be linked by a link editor with the pre-compiled library of functions, so as to yield an executable which implements desired printer functionality.

2. A method according to claim 1, wherein the source code implements the design parameters through calls to functions in the pre-compiled library, and through a call to the printer port function.

3. A method according to claim 1, wherein the source code implements the design parameters through variable definitions that, when linked to the pre-compiled library, instructs functions in the pre-compiled library how to execute a print job including how to call the printer port function.

4. A method according to claim 1, further comprising the step of obtaining an other pointer to an other function that uses a port or an operating system function to access a system resource, the source code further including the other pointer or a call to the other function.

5. A method according to claim 4, wherein the operating system function is selected from the group consisting of memory management functions, process control functions, controlled print job termination functions, display interface functions, and storage interface functions.

6. A method according to claim 1, wherein design parameters are obtained through interactive processing with a software developer.

7. A method according to claim 1, wherein design parameters are obtained from a database.

8. A method according to claim 1, wherein design parameters are obtained from a script.

9. A method according to claim 1, wherein printer functionality includes functionality pertaining to color matching and halftone processing.

10. A method according to claim 1, wherein input functionality includes functionality pertaining to font support and recording media support.

11. A method according to claim 1, wherein output functionality includes functionality pertaining to output format.

12. An apparatus for generating source code in a code generator having a pre-compiled library of proprietary printer functions having entry points accessible by a link editor, said apparatus comprising:

obtaining means for obtaining design parameters for a printer driver, said design parameters including parameters relating to input functionality, output functionality, user interface functionality, and print data processing functionality, and for obtaining a pointer to a printer port function that interfaces directly to a printer port; and

generating means for generating source code in a high-level language, with the source code implementing the design parameters using appropriate ones of the functions in the pre-compiled library, and by using the printer port function;

whereby the generated source code may be compiled by a standard compiler into a compiled object, and the compiled object can be linked by a link editor with the pre-compiled library of functions, so as to yield an executable which implements desired printer functionality.

13. An apparatus according to claim 12, wherein the source code implements the design parameters through calls to functions in the pre-compiled library, and a call to the printer port function.

14. An apparatus according to claim 12, wherein the source code implements the design parameters through variable definitions that, when linked to the pre-compiled library, instructs functions in the pre-compiled library how to execute a print job including how to call the printer port function.

15. An apparatus according to claim 12, further comprising obtaining means for obtaining an other pointer to an other function that uses a port or an operating system function to access a system resource, the source code further including a call to the other function.

16. An apparatus according to claim 15, wherein the operating system function is selected from the group consisting of memory management functions, process control functions, controlled print job termination functions, display interface functions, and storage interface functions.

17. An apparatus according to claim 12, wherein design parameters are obtained through interactive processing with a software developer.

18. An apparatus according to claim 12, wherein design parameters are obtained from a database.

19. An apparatus according to claim 12, wherein design parameters are obtained from a script.

20. An apparatus according to claim 12, wherein printer functionality includes functionality pertaining to color matching and halftone processing.

21. An apparatus according to claim 12, wherein input functionality includes functionality pertaining to font support and recording media support.

22. An apparatus according to claim 12, wherein output functionality includes functionality pertaining to output format.

23. An apparatus for generating source code in a code generator having a pre-compiled library of proprietary printer functions having entry points accessible by a link editor, said apparatus comprising:

a memory including a region for storing executable process steps; and

a processor for executing the executable process steps;

wherein the executable process steps include the steps of;

(a) obtaining design parameters for a printer driver, said design parameters including parameters relating to input functionality, output functionality, user interface functionality, and print data processing functionality;

(b) obtaining a pointer to a printer port function that interfaces directly to a printer port; and

(c) generating source code in a high-level language, with the source code implementing the design parameters using appropriate ones of the functions in the pre-compiled library, and by using the printer port function;

whereby the generated source code may be compiled by a standard compiler into a compiled object, and the compiled object can be linked by a link editor with the pre-compiled library of functions, so as to yield an executable which implements desired printer functionality.

24. An apparatus according to claim 23, wherein the source code implements the design parameters through calls to functions in the pre-compiled library, and a call to the printer port function.

25. An apparatus according to claim 23, wherein the source code implements the design parameters through variable definitions that, when linked to the pre-compiled library, instructs functions in the pre-compiled library how to execute a print job including how to call the printer port function.

26. An apparatus according to claim 23, wherein the executable process steps further comprise the step of obtaining an other pointer to an other function that uses a port or an operating system function to access a system resource, the source code further including the other pointer or a call to the other function.

27. An apparatus according to claim 26, wherein the operating system function is selected from the group consisting of memory management functions, process control functions, controlled print job termination functions, display interface functions, and storage interface functions.

28. An apparatus according to claim 23, wherein design parameters are obtained through interactive processing with a software developer.

29. An apparatus according to claim 23, wherein design parameters are obtained from a database.

30. An apparatus according to claim 23, wherein design parameters are obtained from a script.

31. An apparatus according to claim 23, wherein printer functionality includes functionality pertaining to color matching and halftone processing.

32. An apparatus according to claim 23, wherein input functionality includes functionality pertaining to font support and recording media support.

33. An apparatus according to claim 23, wherein output functionality includes functionality pertaining to output format.

34. Computer-executable process steps stored on a computer-readable medium, the computer-executable process steps to generate source code in a code generator having a pre-compiled library of proprietary printer functions having entry points accessible by a link editor, said computer-executable process steps comprising:

code to obtain design parameters for a printer driver, said design parameters including parameters relating to input functionality, output functionality, user interface functionality, and print data processing functionality;

code to obtain a pointer to a printer port function that interfaces directly to a printer port; and

code to generate source code in a high-level language, with the source code implementing the design parameters using appropriate ones of the functions in the pre-compiled library, and by using the printer port function;

whereby the generated source code may be compiled by a standard compiler into a compiled object, and the compiled object can be linked by a link editor with the pre-compiled library of functions, so as to yield an executable which implements desired printer functionality.

35. Computer-executable process steps according to claim 34, wherein the source code implements the design parameters through calls to functions in the pre-compiled library, and a call to the printer port function.

36. Computer-executable process steps according to claim 34, wherein the source code implements the design parameters through variable definitions that, when linked to the pre-compiled library, instructs functions in the pre-compiled library how to execute a print job including how to call the printer port function.

37. Computer-executable process steps according to claim 34, further comprising code to obtain an other pointer to an other function that uses a port or an operating system function to access a system resource, the source code further including the other pointer or a call to the other function.

38. Computer-executable process steps according to claim 37, wherein the operating system function is selected from the group consisting of memory management functions, process control functions, controlled print job termination functions, display interface functions, and storage interface functions.

39. Computer-executable process steps according to claim 34, wherein design parameters are obtained through interactive processing with a software developer.

40. Computer-executable process steps according to claim 34, wherein design parameters are obtained from a database.

41. Computer-executable process steps according to claim 34, wherein design parameters are obtained from a script.

42. Computer-executable process steps according to claim 34, wherein printer functionality includes functionality pertaining to color matching and halftone processing.

43. Computer-executable process steps according to claim 34, wherein input functionality includes functionality pertaining to font support and recording media support.

44. Computer-executable process steps according to claim 34, wherein output functionality includes functionality pertaining to output format.

45. A computer-readable medium which stores computer-executable process steps, the computer-executable process steps to generate source code in a code generator having a pre-compiled library of proprietary printer functions having entry points accessible by a link editor, said computer-executable process steps comprising:

a first obtaining step to obtain design parameters for a printer driver, said design parameters including parameters relating to input functionality, output functionality and print data processing functionality;

a second obtaining step to obtain a pointer to a printer port function that interfaces directly to a printer port; and

a generating step to generate source code in a high-level language, with the source code implementing the design parameters using appropriate ones of the functions in the pre-compiled library, and by using the printer port function;

whereby the generated source code may be compiled by a standard compiler into a compiled object, and the compiled object can be linked by a link editor with the pre-compiled library of functions, so as to yield an executable which implements desired printer functionality.

46. A computer-readable medium according to claim 45, wherein the source code implements the design parameters through calls to functions in the pre-compiled library, and a call to the printer port function.

47. A computer-readable medium according to claim 45, wherein the source code implements the design parameters through variable definitions that, when linked to the pre-compiled library, instructs functions in the pre-compiled library how to execute a print job including how to call the printer port function.

48. A computer-readable medium according to claim 45, wherein the computer-executable process steps further comprise a third obtaining step to obtain an other pointer to an other function that uses a port or an operating system function to access a system resource, the source code further including the other pointer or a call to the other function.

49. A computer-readable medium according to claim 48, wherein the operating system function is selected from the group consisting of memory management functions, process control functions, controlled print job termination functions, display interface functions, and storage interface functions.

50. A computer-readable medium according to claim 45, wherein design parameters are obtained through interactive processing with a software developer.

51. A computer-readable medium according to claim 45, wherein design parameters are obtained from a database.

52. A computer-readable medium according to claim 45, wherein design parameters are obtained from a script.

53. A computer-readable medium according to claim 45, wherein printer functionality includes functionality pertaining to color matching and halftone processing.

54. A computer-readable medium according to claim 45, wherein input functionality includes functionality pertaining to font support and recording media support.

55. A computer-readable medium according to claim 45, wherein output functionality includes functionality pertaining to output format.

56. A method for building a printer driver using a code generator that generates source code linkable to a pre-compiled library of proprietary printer functions having entry points accessible by a link editor, said method comprising the steps of:

providing the code generator with design parameters that define functionality of the printer driver;

providing the code generator with a pointer to a printer port function that interfaces directly to a printer port;

obtaining generated source code from the code generator, the source code including variable definitions for or calls to at least one of the proprietary printer functions in the pre-compiled library and a pointer or a call to the printer port function; and

compiling the generated source code, the compiled code being linkable with the pre-compiled library to obtain an executable which implements desired printer functionality.

57. A method according to claim 56, further comprising the step of completing portions of the source code with manually generated source code.

58. A method according to claim 56, further comprising providing an other pointer to an other function that uses a port or an operating system function to access a system resource, the source code further including a call to the other function.

59. A method according to claim 58, wherein the operating system function is selected from the group consisting of memory management functions, process control functions, controlled print job termination functions, display interface functions, and storage interface functions.

60. A method according to claim 59, further comprising the step of loading the executable in a target system.

61. A method according to claim 60, further comprising the step of testing the executable in the target system.