1al_get_glyph_dimensions(3)                          al_get_glyph_dimensions(3)
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NAME

6       al_get_glyph_dimensions - Allegro 5 API
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SYNOPSIS

9              #include <allegro5/allegro_font.h>
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11              bool al_get_glyph_dimensions(const ALLEGRO_FONT *f,
12                 int codepoint, int *bbx, int *bby, int *bbw, int *bbh)
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DESCRIPTION

15       Sometimes,  the  al_get_glyph_width(3) or al_get_glyph_advance(3) func‐
16       tions are not enough for exact glyph placement, so  this  function  re‐
17       turns some additional information, particularly if you want to draw the
18       font vertically.
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20       The function itself returns true if the character was present  in  font
21       and false if the character was not present in font.
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23       Returned variables (all in pixel):
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25       • bbx, bby - Offset to upper left corner of bounding box.
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27       • bbw, bbh - Dimensions of bounding box.
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29       These values are the same as al_get_text_dimensions(3) would return for
30       a string of a single character equal to the glyph passed to this  func‐
31       tion.   Note  that  glyphs  may go to the left and upwards of the X, in
32       which case x and y will have negative values.
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34       If you want to draw a string verticallly, for Japanese or as a game ef‐
35       fect, then you should leave bby + bbh space between the glyphs in the y
36       direction for a regular placement.
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38       If you want to draw a string horizontally in an extra compact way,
39       then you should leave bbx + bbw space between the glyphs in the  x  di‐
40       rection for a compact placement.
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42       In the figure below is an example of what bbx and bby may be like for a
43       2 glyph, and a g glyph of the same  font  compared  to  the  result  of
44       al_get_glyph_width().
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46                 al_get_glyph_width()     al_get_glyph_width()
47                        __|___                   __|__
48                       /      \                 /     \
49                   bbx    bbw                 bbx   bbw
50                  <-->+<------>+           <-->+<----->+   X baseline
51                  ^   |        |           ^   |       |
52              bby |   |        |       bby |   |       |
53                  v   |        |           |   |       |
54                  +---+--------+           |   |       |
55                  ^   | *****  |           |   |       |
56                  |   |*    ** |           v   |       |
57              bbh |   |    **  |       bbh +---+-------+
58                  |   |  **    |           ^   | ***** |
59                  v   |********|           |   |*     *|
60                  +---+--------+           |   | ***** |
61                                           |   |      *|
62                                           |   | *    *|
63                                           v   |  **** |
64                                           +---+-------+
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SINCE

67       5.1.12
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SEE ALSO

70       al_draw_glyph(3), al_get_glyph_width(3), al_get_glyph_advance(3).
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74Allegro reference manual                            al_get_glyph_dimensions(3)
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