CA2498391A1 - Method of rendering text on an output device - Google Patents

Method of rendering text on an output device Download PDF

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Publication number
CA2498391A1
CA2498391A1 CA 2498391 CA2498391A CA2498391A1 CA 2498391 A1 CA2498391 A1 CA 2498391A1 CA 2498391 CA2498391 CA 2498391 CA 2498391 A CA2498391 A CA 2498391A CA 2498391 A1 CA2498391 A1 CA 2498391A1
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CA
Canada
Prior art keywords
character
image
custom
defining
image file
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2498391
Other languages
French (fr)
Other versions
CA2498391C (en
Inventor
Gerhard Klassen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Publication of CA2498391A1 publication Critical patent/CA2498391A1/en
Application granted granted Critical
Publication of CA2498391C publication Critical patent/CA2498391C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/22Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/222Control of the character-code memory
    • G09G5/225Control of the character-code memory comprising a loadable character generator
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/22Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

A method of rendering text on an output device using a pre-developed image of a custom font. An image file defines an image of a custom developed character set. The custom character set may be developed off-line using graphics development tools. Associated character information enables the location of specific characters within the image. When a text character is output to a display or other output device, a custom font module locates the text character within the image and defines a subimage that contains the text character. The subimage is rendered upon the output device, thereby producing an image of the text character.

Claims (25)

1. In a user device, a method of rendering text on an output device, the user device including an image file defining an image of a custom character set, the user device having stored thereon associated character information, the associated character information including at least one character width for said custom character set, the method comprising the steps of:
locating a selected character from said custom character set within said image based upon said associated character information;
defining a portion of said image containing said selected character;
and rendering said portion on the output device.
2. The method claimed in claim 1, wherein said step of defining includes defining a subimage within said image, said subimage having a width corresponding to said at least one character width.
3. The method claimed in claim 1 or claim 2, wherein said step of defining includes creating a definition and passing said definition to a graphics subsystem, and wherein said graphics subsystem performs said step of rendering.
4. The method claimed in any one of claims 1 to 3, wherein said associated character information includes a character order, and said step of locating includes identifying the location in said image of said selected character based upon said at least one character width and said character order.
5. The method claimed in any one of claims 1 to 4, wherein said image file comprises a bitmapped image file.
6. The method claimed in any one of claims 1 to 5, wherein said output device comprises a display, and said step of rendering includes rendering said portion on said display.
7. The method claimed in any one of claim 1 to 6, further including steps of developing said custom character set off-line and creating and storing said image file on said user device.
8. A user device, comprising:
an output device;
a graphics subsystem for rendering graphics upon said output device;
memory, said memory having stored thereon an image file defining an image of a custom character set and associated character information, said associated character information including at least one character width for said custom character set; and a custom font module for locating a selected character from said custom character set within said image file based upon said associated character information, and defining a portion of said image containing said selected character, wherein said graphics subsystems renders said portion on said output device.
9. The device claimed in claim 8, wherein said custom font module includes a component for passing a definition to said graphics subsystem, said definition defining said portion.
10. The device claimed in claim 8 or claim 9, wherein said portion includes a subimage within said image, said subimage having a width corresponding to said at least one character width.
11. The device claimed in any one of claims 8 to 10, wherein said custom font module executes within said graphics subsystem.
12. The device claimed in any one of claims 8 to 11, wherein said associated character information includes a character order and said custom font module identifies the location in said image of said selected character based upon said at least one character width and said character order.
13. The device claimed in any one of claims 8 to 12, wherein said image file comprises a bitmapped image file.
14. The device claimed in any one of claims 8 to 13, wherein said output device comprises a display.
15. A computer program product having a computer-readable medium tangibly embodying computer executable instructions for rendering text on an output device in a user' device, the user device including an image file defining an image of a custom character set, the user device having stored thereon associated character information, the associated character information including at least one character width for said custom character set, the user device having a graphics subsystem for rendering images on the output device, the computer executable instructions comprising:
computer executable instructions for locating a selected character from said custom character set within said image based upon said associated character information; and computer executable instructions for defining a portion of said image containing said selected character, wherein said graphics subsystem renders said portion on the output device.
16. The computer program product claimed in claim 15, wherein said computer executable instructions for defining include computer executable instructions for defining a subimage within said image, said subimage having a width corresponding to said at least one character width.
17. The computer program product claimed in claim 15 or claim 16, wherein said computer executable instructions for defining include computer executable instructions for creating a definition and passing said definition to said graphics subsystem.
18. The computer program product claimed in any one of claims 15 to 17, wherein said associated character information includes a character order, and said computer executable instructions for locating include computer executable instructions for identifying the location in said image of said selected character based upon said at least one character width and said character order.
19. The computer program product claimed in any one of claims 15 to 18, wherein said image file comprises a bitmapped image file.
20. The computer program product claimed in any one of claims 15 to 19, wherein said output device comprises a display.
21. A mobile device, comprising:
a display screen;
a graphics subsystem coupled to said display screen for rendering graphics upon said display screen;
a memory, said memory containing an image file defining an image, said image including a custom character set, said memory further containing associated character information, said associated character information including character order information and at least one character width for said custom character set;
a custom font module for locating a portion of said image containing a selected character from said custom character set within said image file based upon said associated character information, and producing a definition defining said portion of said image containing said selected character, wherein said graphics subsystem receives said definition and renders said portion on said display screen.
22. The mobile device claimed in claim 21, wherein said mobile device comprises a handheld mobile device.
23. The mobile device claimed in claim 21 or claim 22, wherein said image file includes a file having a standard image format.
24. The mobile device claimed in any one of claims 21 to 23, wherein said custom character set includes a plurality of glyphs comprising a font.
25. The mobile device claimed in claim 24, wherein said selected character includes two or more adjacent glyphs.
CA2498391A 2004-02-26 2005-02-24 Method of rendering text on an output device Active CA2498391C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04251094A EP1569197A1 (en) 2004-02-26 2004-02-26 Method of rendering text on an output device
EP04251094.1 2004-02-26

Publications (2)

Publication Number Publication Date
CA2498391A1 true CA2498391A1 (en) 2005-08-26
CA2498391C CA2498391C (en) 2012-09-11

Family

ID=34746099

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2498391A Active CA2498391C (en) 2004-02-26 2005-02-24 Method of rendering text on an output device

Country Status (2)

Country Link
EP (1) EP1569197A1 (en)
CA (1) CA2498391C (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5072214A (en) 1989-05-11 1991-12-10 North American Philips Corporation On-screen display controller
DE60143486D1 (en) * 2000-07-21 2010-12-30 Ericsson Telefon Ab L M METHOD AND DEVICE FOR PRODUCING IMAGES IN A TEXT DISPLAY OF A MOBILE DEVICE

Also Published As

Publication number Publication date
CA2498391C (en) 2012-09-11
EP1569197A1 (en) 2005-08-31

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