FONT PROCESSING SYSTEM AND METHOD

• US 20080046468A1
• Filed: 06/29/2007
• Published: 02/21/2008
• Est. Priority Date: 08/18/2006
• Status: Abandoned Application

• Current Assignee: MediaTek India Technology Pvt Ltd. (MediaTek, Inc.)
• Original Assignee: Pixtel Media Technology Pvt., Ltd. (MediaTek, Inc.)
• Inventors: Gupta, Arun, Salwan, Vikram
• Application Number:
  US11/770,775
• Publication Number:
  US 20080046468A1
• Time in Patent Office: Days
• US Class Current: 707/104.1
• CPC Class Codes: G06F 40/109 Font handling; Temporal or kinetic typography

Abstract

An embodiment of a font processing system is provided, comprising a font database, a first array, a second array, and a processor. The font database stores multiple font files, each of which corresponds to a character identified by a character code, with each of the font files stored at a font file address. The first array stores multiple first items, with each of the first items storing information regarding addresses of a set of the font files corresponding to consecutive character codes. The second array stores multiple second items, with each of the second item storing information indicating a set of first items related to a specific value of predefined bits. The processor receives an input character code, acquires one of the second items according to a value of the predefined bits of the input character code, acquires a set of first items indicated by the acquired second item, acquires an address of the input character code by inspecting the acquired set of first items, and acquires a font file corresponding to the input character code from the acquired address.

Claims

1. A font processing system, comprising:

a font database storing a plurality of font files, each of which corresponds to a character identified by a character code, with each of the font files stored at a font file address;

a first array storing a plurality of first items, with each of the first items storing information regarding addresses of a set of the font files corresponding to a plurality of consecutive character codes;

a second array storing a plurality of second items, with each of the second item storing information indicating a set of first items related to a specific value of a plurality of predefined bits; and

a processor receiving an input character code, acquiring one of the second items according to a value of the predefined bits of the input character code, acquiring a set of first items indicated by the acquired second item, acquiring an address of the input character code by inspecting the acquired set of first items, and acquiring a font file corresponding to the input character code from the acquired address.

2. The font processing system of claim 1, wherein the character code is set according to a Universal character set (UCS) coding system.

3. The font processing system of claim 2, wherein the character code comprises an upper significant byte (USB) and a lower significant byte (LSB).

4. The font processing system of claim 3, wherein the predefined bits comprise the USB.

5. The font processing system of claim 1, wherein each second item stores information indicating the minimum index of a set of first items, and a total number of the set of first items.

6. The font processing system of claim 5, wherein the processor acquires the first items with indices between the minimum index of a set of first items indicated by the acquired second item, and the minimum index of the set of first times plus the total number of the set of first items minus one, indicated by the acquired second item.

7. The font processing system of claim 1, wherein each first item stores information indicating a first lower significant byte (LSB) value of a minimum character code of a plurality of consecutive character codes, a second LSB value of a maximum character code of the consecutive character codes, and a font file start address of a font file corresponding to the first LSB value of the minimum character code of the consecutive character codes.

8. The font processing system of claim 7, wherein the processor acquires one of the first items indicated by the acquired second item, comprising information indicating a range of a first LSB value of a minimum character code, and a second LSB value of a maximum character code of the consecutive character codes covering the LSB value of the input character code, and acquires the address of the input character code with reference to information stored in the acquired first item.

9. The font processing system of claim 8, wherein the address of the input character code is calculated by an equation:

$\mathrm{Addr}=\mathrm{FONT\_DATABASE}<br><br>\mathrm{\_OFFSET}+\mathrm{LSBRangeArrary}<br><br>\left[j\right].\mathrm{nInitialFontOffset}+\left(c\&<br><br><br><br><br><br>0\times <br><br>00<br><br>\mathrm{FF}-\mathrm{LSBRangeArray}<br><br>\left[j\right].\mathrm{nInitialRangeVal}\right)\times <br><br>\mathrm{FONT\_SIZE};<br><br>$

the constant “

FONT_DATABASE_OFFSET”

represents an address of the beginning of the font database, j represents an index of the acquired first item, c represents the input character code, LSBRangeArrary[j].nInitialFontOffset represents a relative offset for the first LSB value of the minimum character code, LSBRangeArray[j].nInitialRangeVal represents the first LSB value of the minimum character code, and the constant “

FONT_SIZE”

represents a font size in bytes.

10. The font processing system of claim 1, wherein the font processing system is implemented in a handheld apparatus.

11. The font processing system of claim 1, further comprising a display device, wherein the processor displays the content of the acquired font file on the display device.

12. A font processing method, employed in an electronic apparatus, comprising:

providing a font database storing a plurality of font files, each of which corresponding to a character identified by a character code, with each of the font files stored at a font file address;

providing a first array storing a plurality of first items, with each of the first items storing information regarding addresses of a set of the font files corresponding to a plurality of consecutive character codes;

providing a second array storing a plurality of second items, with each of the second items storing information indicating a set of first items related to a specific value of a plurality of predefined bits;

receiving an input character code;

acquiring one of the second items according to a value of the predefined bits of the input character code;

acquiring a set of first items indicated by the acquired second item;

acquiring an address of the input character code by inspecting the acquired set of first items; and

acquiring a font file corresponding to the input character code from the acquired address.

13. The font processing method of claim 12, wherein the character code is set according to a Universal character set (UCS) coding system.

14. The font processing method of claim 13, wherein the character code comprises an upper significant byte and a lower significant byte.

15. The font processing method of claim 14, wherein the predefined bits comprise the USB.

16. The font processing method of claim 12, wherein each second item stores information indicating the minimum index of a set of first items, and a total number of the set of first items.

17. The font processing method of claim 16, wherein the first items is acquired, with indices between the minimum index of a set of first items indicated by the acquired second item, and the minimum index of the set of first times plus the total number of the set of first items minus one, indicated by the acquired second item.

18. The font processing method of claim 12, wherein each first item stores information indicating a first lower significant byte (LSB) value of a minimum character code of a plurality of consecutive character codes, a second LSB value of a maximum character code of the consecutive character codes, and a font file start address of a font file corresponding to the first LSB value of the minimum character code of the consecutive character codes.

19. The font processing method of claim 18, wherein one of the first items indicated by the acquired second item is acquired, comprising information indicating a range of a first LSB value of a minimum character code, and a second LSB value of a maximum character code of the consecutive character codes covering the LSB value of the input character code, and the address of the input character code is acquired with reference to information stored in the acquired first item.

20. The font processing method of claim 19, wherein the address of the input character code is calculated by an equation:

$\mathrm{Addr}=\mathrm{FONT\_DATABASE}<br><br>\mathrm{\_OFFSET}+\mathrm{LSBRangeArrary}<br><br>\left[j\right].\mathrm{nInitialFontOffset}+\left(c-\mathrm{LSBRangeArray}<br><br>\left[j\right].\mathrm{nInitialRangeVal}\right)\times <br><br>\mathrm{FONT\_SIZE};<br><br>$

the constant “

FONT_DATABASE_OFFSET”

represents an address of the beginning of the font database, j represents an index of the acquired first item, c represents the input character code, LSBRangeArrary[j].nInitialFontOffset represents a relative offset for the first LSB value of the minimum character code, LSBRangeArray[j].nInitialRangeVal represents the first LSB value of the minimum character code, and the constant “

FONT_SIZE”

represents a font size in bytes.

21. The font processing method of claim 12, wherein the electronic apparatus is a handheld apparatus.

22. The font processing method of claim 12, further comprising displaying the content of the acquired font file on a display device.