xcb_alloc_color - Allocate a color

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X Version 11                                      libxcb 1.17.0                               xcb_alloc_color(3)

       Allocates a read-only colormap entry corresponding to the closest RGB value supported by the hardware. If
       you are using TrueColor, you can take a shortcut and directly calculate the color pixel  value  to  avoid
       the  round trip. But, for example, on 16-bit color setups (VNC), you can easily get the closest supported
       RGB value to the RGB value you are specifying.

xcb_colormap_error_t
                 The specified colormap cmap does not exist.

       xcb_alloc_color - Allocate a color

response_type
                 The  type  of  this  reply,  in  this  case  XCB_ALLOC_COLOR. 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).

       red       TODO: NOT YET DOCUMENTED.

       green     TODO: NOT YET DOCUMENTED.

       blue      TODO: NOT YET DOCUMENTED.

       pixel     TODO: NOT YET DOCUMENTED.

conn      The XCB connection to X11.

       cmap      TODO

       red       The red value of your color.

       green     The green value of your color.

       blue      The blue value of your color.

       Returns an xcb_alloc_color_cookie_t. Errors have to be handled when calling the  reply  function  xcb_al‐loc_color_reply.

       If  you  want  to  handle  errors  in  the event loop instead, use xcb_alloc_color_unchecked. See xcb-re‐quests(3) for details.

xcb-requests(3)

#include<xcb/xproto.h>Requestfunction

       xcb_alloc_color_cookie_t xcb_alloc_color(xcb_connection_t *conn, xcb_colormap_t cmap, uint16_t red,
              uint16_t green, uint16_t blue);

   Replydatastructure
       typedef struct xcb_alloc_color_reply_t {
           uint8_t  response_type;
           uint8_t  pad0;
           uint16_t sequence;
           uint32_t length;
           uint16_t red;
           uint16_t green;
           uint16_t blue;
           uint8_t  pad1[2];
           uint32_t pixel;
       } xcb_alloc_color_reply_t;

   Replyfunction

       xcb_alloc_color_reply_t *xcb_alloc_color_reply(xcb_connection_t *conn, xcb_alloc_color_cookie_t cookie,
              xcb_generic_error_t **e);