1XmbTextPerCharExtents(3)        XLIB FUNCTIONS        XmbTextPerCharExtents(3)
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NAME

6       XmbTextPerCharExtents, XwcTextPerCharExtents, Xutf8TextPerCharExtents -
7       obtain per-character information for a text string
8

SYNTAX

10       Status XmbTextPerCharExtents(XFontSet font_set, _Xconst  char  *string,
11              int  num_bytes,  XRectangle *ink_array_return, XRectangle *logi‐
12              cal_array_return, int array_size, int *num_chars_return,  XRect‐
13              angle *overall_ink_return, XRectangle *overall_logical_return);
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15       Status   XwcTextPerCharExtents(XFontSet   font_set,   _Xconst   wchar_t
16              *string, int num_wchars, XRectangle *ink_array_return,  XRectan‐
17              gle  *logical_array_return,  int  array_size, int *num_chars_re‐
18              turn, XRectangle *overall_ink_return, XRectangle  *overall_logi‐
19              cal_return);
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21       Status Xutf8TextPerCharExtents(XFontSet font_set, _Xconst char *string,
22              int num_bytes, XRectangle *ink_array_return,  XRectangle  *logi‐
23              cal_array_return,  int array_size, int *num_chars_return, XRect‐
24              angle *overall_ink_return, XRectangle *overall_logical_return);
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ARGUMENTS

27       array_size
28                 Specifies the size of ink_array_return and  logical_array_re‐
29                 turn.  The caller must pass in arrays of this size.
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31       font_set  Specifies the font set.
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33       ink_array_return
34                 Returns the ink dimensions for each character.
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36       logical_array_return
37                 Returns the logical dimensions for each character.
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39       num_bytes Specifies the number of bytes in the string argument.
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41       num_chars_return
42                 Returns the number of characters in the string argument.
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44       num_wchars
45                 Specifies the number of characters in the string argument.
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47       overall_ink_return
48                 Returns the overall ink extents of the entire string.
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50       overall_logical_return
51                 Returns the overall logical extents of the entire string.
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53       string    Specifies the character string.
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DESCRIPTION

56       The   XmbTextPerCharExtents,  XwcTextPerCharExtents  and  Xutf8TextPer‐
57       CharExtents functions return the text dimensions of each  character  of
58       the  specified text, using the fonts loaded for the specified font set.
59       Each successive element of ink_array_return and logical_array_return is
60       set  to the successive character's drawn metrics, relative to the draw‐
61       ing origin of the string and one rectangle for each  character  in  the
62       supplied  text  string.  The number of elements of ink_array_return and
63       logical_array_return that have been set is  returned  to  num_chars_re‐
64       turn.
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66       Each element of ink_array_return is set to the bounding box of the cor‐
67       responding character's drawn foreground color.  Each element  of  logi‐
68       cal_array_return is set to the bounding box that provides minimum spac‐
69       ing to other graphical features for the corresponding character.  Other
70       graphical features should not intersect any of the logical_array_return
71       rectangles.
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73       Note that an XRectangle represents the effective drawing dimensions  of
74       the character, regardless of the number of font glyphs that are used to
75       draw the character or the direction in which the  character  is  drawn.
76       If  multiple characters map to a single character glyph, the dimensions
77       of all the XRectangles of those characters are the same.
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79       When the XFontSet has missing charsets, metrics  for  each  unavailable
80       character  are taken from the default string returned by XCreateFontSet
81       so that the metrics represent the text as it will  actually  be  drawn.
82       The behavior for an invalid codepoint is undefined.
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84       If the array_size is too small for the number of characters in the sup‐
85       plied text, the functions return zero and num_chars_return  is  set  to
86       the  number  of rectangles required.  Otherwise, the functions return a
87       nonzero value.
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89       If the overall_ink_return or overall_logical_return  argument  is  non-
90       NULL,  XmbTextPerCharExtents,  XwcTextPerCharExtents  and Xutf8TextPer‐
91       CharExtents return the maximum extent of the string's metrics to  over‐
92       all_ink_return  or  overall_logical_return,  as  returned by XmbTextEx‐
93       tents, XwcTextExtents or Xutf8TextExtents.
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95       The function Xutf8TextPerCharExtents is an extension introduced by  The
96       XFree86  Project,  Inc., in their 4.0.2 release.  Its presence is indi‐
97       cated by the macro X_HAVE_UTF8_STRING.
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SEE ALSO

100       XmbTextEscapement(3), XmbTextExtents(3) Xlib - C Language X Interface
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104X Version 11                     libX11 1.8.1         XmbTextPerCharExtents(3)
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