X Logical Font Description Conventions: X Consortium Standard

✍ Scribed by Jim Flowers, Stephen Gildea (eds.)

• Publisher: X Consortium, Inc.
• Year: 1998
• Tongue: English
• Leaves: 36
• Category: Library

✦ Synopsis

Retrieved from http://web.archive.org/web/20170113055641/http://www.xfree86.org/current/xlfd.pdf on 2017 January 13.

1998 date from http://web.archive.org/web/20170113060038/https://en.wikipedia.org/wiki/X_Window_System, also retrieved on 2017 January 13: "The Open Group released X11R6.4 in early 1998."

✦ Table of Contents

1. Introduction
   ......................... 1
2. Requirements and Goals
   ..................... 1
   2.1. Provide Unique and Descripti
   ve Fo
   nt Names
   .............. 1
   2.2. Support Multiple Font Vendors and Character Sets
   ............ 1
   2.3. Support Scalable and Polymorphic F
   onts .
   .............. 2
   2.4. Support Transformations and Subsetting of F
   onts .
   ........... 2
   2.5. Be Independent of X Server and Operating or File System Implementations
   .... 2
   2.6. Support Arbitrarily Comple
   xF
   ont Matching and Substitution
   ........ 2
   2.7. Be Extensible
   ........................ 2
3. X Logical Font Description
   .................... 2
   3.1. F
   ontName .
   ........................ 3
   3.1.1. FontName Syntax
   ...................... 3
   3.1.2. FontName Field Definitions
   ................... 4
   3.1.2.1. FOUNDR
   YF
   ield .
   .................... 4
   3.1.2.2. FAMILY_NAME Field
   ................... 4
   3.1.2.3. WEIGHT_NAME Field
   ................... 5
   3.1.2.4. SLANT Field
   ...................... 5
   3.1.2.5. SETWIDTH_NAME Field
   .................. 5
   3.1.2.6. ADD_STYLE_NAME Field
   .................. 6
   3.1.2.7. PIXEL_SIZE Field
   ..................... 6
   3.1.2.8. POINT_SIZE Field
   ..................... 6
   3.1.2.9. RESOLUTION_X and RESOLUTION_Y Fields
   ........... 7
   3.1.2.10. SP
   AC
   ING Field
   ..................... 7
   3.1.2.11. AVERAGE_WIDTH Field
   .................. 7
   3.1.2.12. CHARSET_REGISTR
   Ya
   nd CHARSET_ENCODING Fields
   ....... 8
   3.1.3. Examples
   ........................ 9
   3.2. Font Properties
   ....................... 9
   3.2.1. FOUNDR
   Y. . . . . . . . . . . . . . . . . . . . . . . .
   10
   3.2.2. FAMILY_N
   AME .
   ..................... 1
   0
   3.2.3. WEIGHT_N
   AME .
   ..................... 1
   1
   3.2.4. SLANT
   ......................... 1
   1
   3.2.5. SETWIDTH_N
   AME .
   .................... 1
   1
   3.2.6. ADD_STYLE_N
   AME .
   ................... 1
   1
   3.2.7. PIXEL_SIZE
   ....................... 1
   1
   3.2.8. POINT_SIZE
   ....................... 1
   2
   3.2.9. RESOLUTION_X
   ...................... 1
   2
   3.2.10. RESOLUTION_Y
   ..................... 1
   2
   3.2.11. SP
   AC
   ING .
   ....................... 1
   2
   3.2.12. AVERA
   GE_WIDTH .
   ................... 1
   2
   3.2.13. CHARSET_REGISTR
   Y.
   .................. 1
   3
   3.2.14. CHARSET_ENCODING
   ................... 1
   3
   3.2.15. MIN_SP
   AC
   E. . . . . . . . . . . . . . . . . . . . . . .
   13
   3.2.16. NORM_SP
   AC
   E. . . . . . . . . . . . . . . . . . . . . .
   13
   3.2.17. MAX_SP
   AC
   E.
   ..................... 1
   3
   3.2.18. END_SP
   AC
   E. . . . . . . . . . . . . . . . . . . . . . .
   13
   3.2.19. A
   VG
   CAPIT
   AL_WIDTH .
   .................. 1
   4
   i
   XL
   ogical Font Description Con
   ventions X11,
   Release 6.4
   3.2.20. A
   VG
   _LO
   WERCASE_WIDTH .
   ................ 1
   4
   3.2.21. Q
   UA
   D_WIDTH .
   ..................... 1
   4
   3.2.22. FIGURE_WIDTH
   ..................... 1
   5
   3.2.23. SUPERSCRIPT_X
   ..................... 1
   5
   3.2.24. SUPERSCRIPT_Y
   ..................... 1
   5
   3.2.25. SUBSCRIPT_X
   ...................... 1
   5
   3.2.26. SUBSCRIPT_Y
   ...................... 1
   6
   3.2.27. SUPERSCRIPT_SIZE
   .................... 1
   6
   3.2.28. SUBSCRIPT_SIZE
   ..................... 1
   6
   3.2.29. SMALL_CAP_SIZE
   .................... 1
   6
   3.2.30. UNDERLINE_POSITION
   .................. 1
   7
   3.2.31. UNDERLINE_THICKNESS
   .................. 1
   7
   3.2.32. STRIKEOUT_ASCENT
   ................... 1
   7
   3.2.33. STRIKEOUT_DESCENT
   ................... 1
   7
   3.2.34. IT
   ALIC_ANGLE .
   .................... 1
   8
   3.2.35. CAP_HEIGHT
   ...................... 1
   8
   3.2.36. X_HEIGHT
   ....................... 1
   8
   3.2.37. RELA
   TIVE_SETWIDTH .
   .................. 1
   9
   3.2.38. RELA
   TIVE_WEIGHT .
   ................... 1
   9
   3.2.39. WEIGHT
   ........................ 2
   0
   3.2.40. RESOLUTION
   ...................... 2
   0
   3.2.41. FONT
   ......................... 2
   1
   3.2.42. F
   AC
   E_N
   AME .
   ..................... 2
   1
   3.2.43. FULL_N
   AME .
   ..................... 2
   1
   3.2.44. COPYRIGHT
   ....................... 2
   1
   3.2.45. NO
   TICE .
   ....................... 2
   1
   3.2.46. DESTIN
   AT
   ION .
   ..................... 2
   1
   3.2.47. FONT_TYPE
   ....................... 2
   2
   3.2.48. FONT_VERSION
   ..................... 2
   2
   3.2.49. RASTERIZER_N
   AME .
   ................... 2
   2
   3.2.50. RASTERIZER_VERSION
   .................. 2
   3
   3.2.51. RA
   W_ASCENT .
   ..................... 2
   3
   3.2.52. RA
   W_DESCENT .
   .................... 2
   3
   3.2.53. RA
   W* .
   ........................ 2
   3
   3.2.54. AXIS_N
   AMES .
   ..................... 2
   3
   3.2.55. AXIS_LIMITS
   ...................... 2
   3
   3.2.56. AXIS_TYPES
   ...................... 2
   3
   3.3. Built-in Font Property Atoms
   ................... 2
   3
4. Matrix T
   ransformations .
   .................... 2
   4
   4.1. Metrics and Font Properties
   ................... 2
   5
5. Scalable F
   onts .
   ....................... 2
   6
6. Polymorphic F
   onts .
   ...................... 2
   7
7. Affected Elements of Xlib and the X Protocol
   .............. 2
   9
8. BDF Conformance
   ....................... 2
   9
   8.1. XLFD Conformance Requirements
   ................. 3
   0
   8.2. FONT_ASCENT
   ,F
   ONT_DESCENT
   ,and DEF
   AU
   LT
   _CHAR .
   ....... 3
   0
   8.2.1. FONT_ASCENT
   ...................... 3
   0
   8.2.2. FONT_DESCENT
   ..................... 3
   0
   8.2.3. DEF
   AU
   LT
   _CHAR .
   .................... 31