xcb_query_font - Man Page
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
Author
Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.
Referenced By
The man pages xcb_query_font_char_infos(3), xcb_query_font_char_infos_iterator(3), xcb_query_font_char_infos_length(3), xcb_query_font_properties(3), xcb_query_font_properties_iterator(3), xcb_query_font_properties_length(3), xcb_query_font_reply(3) and xcb_query_font_unchecked(3) are aliases of xcb_query_font(3).