from small one page howto to huge articles all in one place
poll results
Last additions:
May 25th. 2007:
April, 26th. 2006:
| 
xcb_alloc_color
Section: XCB Requests (3) Updated: libxcb 1.12 Index
Return to Main Contents
NAME
xcb_alloc_color - Allocate a color
SYNOPSIS
#include <xcb/xproto.h>
Request function
-
- 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);
Reply datastructure
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;
Reply function
-
- xcb_alloc_color_reply_t *xcb_alloc_color_reply(xcb_connection_t *conn, xcb_alloc_color_cookie_t cookie, xcb_generic_error_t **e);
REQUEST ARGUMENTS
- 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.
REPLY FIELDS
- 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.
DESCRIPTION
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.
RETURN VALUE
Returns an xcb_alloc_color_cookie_t. Errors have to be handled when calling the reply function xcb_alloc_color_reply.
If you want to handle errors in the event loop instead, use xcb_alloc_color_unchecked. See xcb-requests(3) for details.
ERRORS
- xcb_colormap_error_t
-
The specified colormap cmap does not exist.
SEE ALSO
xcb-requests(3)
AUTHOR
Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.
Index
- NAME
-
- SYNOPSIS
-
- Request function
-
- Reply datastructure
-
- Reply function
-
- REQUEST ARGUMENTS
-
- REPLY FIELDS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- SEE ALSO
-
- AUTHOR
-
| 
|
|
- Running on 
-
:
: 