© Zühlke 2014

Tobias Kniep

Effective Internationalization for Embedded Systems

26. February 2014

Safety Usability Acceptance

Coded Character Set “A mapping from a set of abstract characters to a set of integers.”

Ken Lunde, CJKV Information Processing

ASCII 128

JIS X 0213:2004 4354

Unicode BMP 65536

Unicode 1114112

Number of characters

ASCII

H e a l t h 0x48 0x65 0x61 0x6C 0x74 0x68

[0x48,0x65,0x61,0x6C,0x74,0x68]

Encoding Form

„A character encoding form plus byte serialization “

Glossary of the Unicode Consortium

„Mapping from a character set definition to the actual code units used to represent the data.”

Encoding Scheme

Unicode

健 康 0x5065 0x5EB7

UTF-16LE:[0x65,0x50,0xB7,0x5E] ? UTF-8:[0xE5,0x81,0xA5,0xE5,0xBA,0xB7]

UTF-32BE:[0x00,0x00,0x50,0x65,0x00,0x00,0x5E,0xB7]

�康

Endianess

Little Endian

Big Endian [0x65,0x50,0xB7,0x5E]

[0x50,0x65,0x5E,0xB7]

健康 (0x6550,0xB75E)

敐띞

UTF-8 H 0x48 ¥ 0xC2,0xA5

健 0xE5,0x81,0xA5

𠀷 0xF0,0xA0,0x80,0xB7

0x48 01001000 0xC2 11000010 0xE5 11100101 0xF0 11110000

UTF-16 H 0x0048 ¥ 0x00A5

健 0x5065

𠀷 0xD840,0xDC37

UTF-32 H 0x00000048 ¥ 0x000000A5

健 0x00005065

𠀷 0x00020037

Font “A collection of glyphs used for the visual depiction of character data.”

Glossary of the Unicode Consortium

Pixel-Matrix Here:

3 bits/pixel

No scaling

Easy to display

Predictable output

Bitmap Font

Large

Outline Font Lines, Arcs,

Curves Needs Renderer

Scaling Output hard to predict

Anti-aliasing

Character Set Encoding Font

Ken Lunde, CJKV Information Processing O’Reilly 2009

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Tobias Kniep