xcb_query_font

Section: XCB Requests (3)
Updated: libxcb 1.12
Index Return to Main Contents

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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.  

SEE ALSO

xcb-requests(3)  

AUTHOR

Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.

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Index

NAME

SYNOPSIS

Request function

Reply datastructure

Reply function

Reply accessors

REQUEST ARGUMENTS

REPLY FIELDS

DESCRIPTION

RETURN VALUE

ERRORS

SEE ALSO

AUTHOR