xcb_query_font(3)

1xcb_query_font(3)                XCB Requests                xcb_query_font(3)
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NAME

6       xcb_query_font - query font metrics
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SYNOPSIS

9       #include <xcb/xproto.h>
10
11   Request function
12       xcb_query_font_cookie_t xcb_query_font(xcb_connection_t *conn,
13              xcb_fontable_t font);
14
15   Reply datastructure
16       typedef struct xcb_query_font_reply_t {
17           uint8_t        response_type;
18           uint8_t        pad0;
19           uint16_t       sequence;
20           uint32_t       length;
21           xcb_charinfo_t min_bounds;
22           uint8_t        pad1[4];
23           xcb_charinfo_t max_bounds;
24           uint8_t        pad2[4];
25           uint16_t       min_char_or_byte2;
26           uint16_t       max_char_or_byte2;
27           uint16_t       default_char;
28           uint16_t       properties_len;
29           uint8_t        draw_direction;
30           uint8_t        min_byte1;
31           uint8_t        max_byte1;
32           uint8_t        all_chars_exist;
33           int16_t        font_ascent;
34           int16_t        font_descent;
35           uint32_t       char_infos_len;
36       } xcb_query_font_reply_t;
37
38   Reply function
39       xcb_query_font_reply_t *xcb_query_font_reply(xcb_connection_t *conn,
40              xcb_query_font_cookie_t cookie, xcb_generic_error_t **e);
41
42   Reply accessors
43       xcb_fontprop_t *xcb_query_font_properties(const
44              xcb_query_font_request_t *reply);
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46       int xcb_query_font_properties_length(const xcb_query_font_reply_t
47              *reply);
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49       xcb_fontprop_iterator_t xcb_query_font_properties_iterator(const
50              xcb_query_font_reply_t *reply);
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52       xcb_charinfo_t *xcb_query_font_char_infos(const
53              xcb_query_font_request_t *reply);
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55       int xcb_query_font_char_infos_length(const xcb_query_font_reply_t
56              *reply);
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58       xcb_charinfo_iterator_t xcb_query_font_char_infos_iterator(const
59              xcb_query_font_reply_t *reply);
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REQUEST ARGUMENTS

62       conn      The XCB connection to X11.
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64       font      The fontable (Font or Graphics Context) to query.
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REPLY FIELDS

67       response_type
68                 The type of this reply, in this case XCB_QUERY_FONT. This
69                 field is also present in the xcb_generic_reply_t and can be
70                 used to tell replies apart from each other.
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72       sequence  The sequence number of the last request processed by the X11
73                 server.
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75       length    The length of the reply, in words (a word is 4 bytes).
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77       min_bounds
78                 minimum bounds over all existing char
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80       max_bounds
81                 maximum bounds over all existing char
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83       min_char_or_byte2
84                 first character
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86       max_char_or_byte2
87                 last character
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89       default_char
90                 char to print for undefined character
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92       properties_len
93                 how many properties there are
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95       draw_direction
96                 One of the following values:
97
98                 XCB_FONT_DRAW_LEFT_TO_RIGHT
99                           TODO: NOT YET DOCUMENTED.
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101                 XCB_FONT_DRAW_RIGHT_TO_LEFT
102                           TODO: NOT YET DOCUMENTED.
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106       min_byte1 TODO: NOT YET DOCUMENTED.
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108       max_byte1 TODO: NOT YET DOCUMENTED.
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110       all_chars_exist
111                 flag if all characters have nonzero size
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113       font_ascent
114                 baseline to top edge of raster
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116       font_descent
117                 baseline to bottom edge of raster
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119       char_infos_len
120                 TODO: NOT YET DOCUMENTED.
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DESCRIPTION

123       Queries information associated with the font.
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RETURN VALUE

126       Returns an xcb_query_font_cookie_t. Errors have to be handled when
127       calling the reply function xcb_query_font_reply.
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129       If you want to handle errors in the event loop instead, use
130       xcb_query_font_unchecked. See xcb-requests(3) for details.
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ERRORS

133       This request does never generate any errors.
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AUTHOR

139       Generated from xproto.xml. Contact xcb@lists.freedesktop.org for cor‐
140       rections and improvements.
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144X Version 11                      libxcb 1.13                xcb_query_font(3)