xcb_query_font (3) - Linux Manuals

xcb_query_font: query font metrics

NAME

xcb_query_font - query font metrics

SYNOPSIS

#include <xcb/xproto.h>

Request function

xcb_query_font_cookie_t xcb_query_font(xcb_connection_t *conn, xcb_fontable_t font);

Reply datastructure

typedef struct xcb_query_font_reply_t {
    uint8_t        response_type;
    uint8_t        pad0;
    uint16_t       sequence;
    uint32_t       length;
    xcb_charinfo_t min_bounds;
    uint8_t        pad1[4];
    xcb_charinfo_t max_bounds;
    uint8_t        pad2[4];
    uint16_t       min_char_or_byte2;
    uint16_t       max_char_or_byte2;
    uint16_t       default_char;
    uint16_t       properties_len;
    uint8_t        draw_direction;
    uint8_t        min_byte1;
    uint8_t        max_byte1;
    uint8_t        all_chars_exist;
    int16_t        font_ascent;
    int16_t        font_descent;
    uint32_t       char_infos_len;
} xcb_query_font_reply_t;

Reply function

xcb_query_font_reply_t *xcb_query_font_reply(xcb_connection_t *conn, xcb_query_font_cookie_t cookie, xcb_generic_error_t **e);

Reply accessors

xcb_fontprop_t *xcb_query_font_properties(const xcb_query_font_request_t *reply);
int xcb_query_font_properties_length(const xcb_query_font_reply_t *reply);
xcb_fontprop_iterator_t xcb_query_font_properties_iterator(const xcb_query_font_reply_t *reply);
xcb_charinfo_t *xcb_query_font_char_infos(const xcb_query_font_request_t *reply);
int xcb_query_font_char_infos_length(const xcb_query_font_reply_t *reply);
xcb_charinfo_iterator_t xcb_query_font_char_infos_iterator(const xcb_query_font_reply_t *reply);

REQUEST ARGUMENTS

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

REPLY FIELDS

response_type
The type of this reply, in this case XCB_QUERY_FONT. This field is also present in the xcb_generic_reply_t and can be used to tell replies apart from each other.
sequence
The sequence number of the last request processed by the X11 server.
length
The length of the reply, in words (a word is 4 bytes).
min_bounds
minimum bounds over all existing char
max_bounds
maximum bounds over all existing char
min_char_or_byte2
first character
max_char_or_byte2
last character
default_char
char to print for undefined character
properties_len
how many properties there are
draw_direction
One of the following values:
XCB_FONT_DRAW_LEFT_TO_RIGHT
TODO: NOT YET DOCUMENTED.
XCB_FONT_DRAW_RIGHT_TO_LEFT
TODO: NOT YET DOCUMENTED.

min_byte1
TODO: NOT YET DOCUMENTED.
max_byte1
TODO: NOT YET DOCUMENTED.
all_chars_exist
flag if all characters have nonzero size
font_ascent
baseline to top edge of raster
font_descent
baseline to bottom edge of raster
char_infos_len
TODO: NOT YET DOCUMENTED.

DESCRIPTION

Queries information associated with the font.

RETURN VALUE

Returns an xcb_query_font_cookie_t. Errors have to be handled when calling the reply function xcb_query_font_reply.

If you want to handle errors in the event loop instead, use xcb_query_font_unchecked. See xcb-requests(3) for details.

ERRORS

This request does never generate any errors.

AUTHOR

Generated from xproto.xml. Contact xcb [at] lists.freedesktop.org for corrections and improvements.

SEE ALSO

xcb-requests(3)