Text Rendering Tech

Text Rendering Tech

• 1.
  jjgod <gzjjgod@gmail.com>
• 2.
  : X11, MacOS X Win32 ( ) google URL
• 3.
  "hello world" “hello world”
• 4.
  : UTF-8 char *:"hello, world0" ASCII O(1) O(n) str[n] n Unix glib
• 5.
  : UTF-16/UCS-2 short []= { 0, 'h', 0, 'e', 0, 'l', ... } Little Endian Big Endian ( ) Win32 Unicode Mac OS X Core Foundation, NSFoundation UCS-2 O(1) Plane 1+, Surrogate O(n)
• 6.
  : UTF-32 uint32_t []= { 'h', 'e', 'l', 'l', 'o' } O(1) 4 ICU
• 7.
  glib: Unicode C ctype.h, string.h (C) libutf-8: UTF-8 (C) libutf8: C UTF-8 wchar_t (C) ICU: Unicode (C/C++)
• 8.
  (character) (glyph) 'h' 'A','´' 'Á'
• 9.
  : Layout Engine Widths in, Heights out. –– David Baron
• 10.
  :
• 11.
  : InstalledFontCollection (.NET), EnumFontFamilies (Win32 API, C) fontconfig: (C) ATS (Apple Type Services): Mac OS X API, Font
• 12.
  : fontconfig (*nix, Mac OS X, Win32) Xft X Hacker Keith Packard (fc-list, fc-match, fc-cache)
• 13.
  : : FreeType API , C API : TrueType, Type 1, OpenType, CFF, CID, dfont, pcf : fontconfig, xft, cairo, pango, ICU : metrics ( )
• 14.
  : : metrics
• 15.
  : Layout Engine Uniscribe:Windows Unicode Layout Engine (C++) pango: GTK+/GNOME (C) ICU: (C++) ATSUI (Apple Type Services for Unicode Imaging): Mac OS X 10.4-, deprecate (C) Core Text: Mac OS X 10.5 (C) Cocoa Text System: Mac OS X (Objective C)
• 16.
  helloworld HelloWorld
• 18.
  : Windows : 16pt : ClearType
• 19.
  : Mac OS X
• 20.
  : FreeType / TrueType Bytecode Interpreter / Auto-hinter Gamma : Maxim Shemanarev, Texts Rasterization Exposures (http://www.antigrain.com/research/font_rasterization)
• 21.
  Win32: Win32 Drawing Context TextOut Mac OS X: Quartz Context ATSUDrawText CGShowGlyphs FreeType pango, cairo
• 22.
  : GTK+ gchar * pango cairo_show_glyphs FT_Face fontconfig FreeType FCFontSet
• 23.
  : Core Text CFSTR* CTTypesetter CTLineDraw CTFont CTFontCollection Core Text CTFontDescriptor
• 24.
  : Win32 WCHAR Uniscribe TextOut HFONT EnumFontFamilies win32 api LOGFONT
• 25.
  Questions?