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.ds xT X Toolkit Intrinsics \- C Language Interface

.ds xW Athena X Widgets \- C Language X Toolkit Interface

.ds xL Xlib \- C Language X Interface

.ds xC Inter-Client Communication Conventions Manual

.na

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.ny0

.TH AllPlanes __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"

.SH NAME

AllPlanes, BlackPixel, WhitePixel, ConnectionNumber, DefaultColormap, DefaultDepth, XListDepths, DefaultGC, DefaultRootWindow, DefaultScreenOfDisplay, DefaultScreen, DefaultVisual, DisplayCells, DisplayPlanes, DisplayString, XMaxRequestSize, XExtendedMaxRequestSize, LastKnownRequestProcessed, NextRequest, ProtocolVersion, ProtocolRevision, QLength, RootWindow, ScreenCount, ScreenOfDisplay, ServerVendor, VendorRelease \- Display macros and functions

.SH SYNTAX

unsigned long AllPlanes; 

.HP

unsigned long BlackPixel\^(\^Display *\fIdisplay\fP\^, int \^\fIscreen_number\fP\^);

.HP

unsigned long WhitePixel\^(\^Display *\fIdisplay\fP\^, int \^\fIscreen_number\fP\^); 

.HP

int ConnectionNumber\^(\^Display *\fIdisplay\fP\^); 

.HP

Colormap DefaultColormap\^(\^Display *\fIdisplay\fP\^,

\^int \fIscreen_number\fP\^); 

.HP

int DefaultDepth\^(\^Display *\fIdisplay\fP\^, \^int \fIscreen_number\fP\^); 

.HP

int *XListDepths\^(\^Display *\fIdisplay\fP, int \fIscreen_number\fP, int

\fIcount_return\fP\^); 

.HP

GC DefaultGC\^(\^Display *\fIdisplay\fP\^, \^int \fIscreen_number\fP\^); 

.HP

Window DefaultRootWindow\^(\^Display *\fIdisplay\fP\^); 

.HP

Screen *DefaultScreenOfDisplay\^(\^Display *\fIdisplay\fP\^); 

.HP

int DefaultScreen\^(\^Display *\fIdisplay\fP\^); 

.HP

Visual *DefaultVisual\^(\^Display *\fIdisplay\fP\^, \^int

\fIscreen_number\fP\^); 

.HP

int DisplayCells\^(\^Display *\fIdisplay\fP\^, \^int \fIscreen_number\fP\^); 

.HP

int DisplayPlanes\^(\^Display *\fIdisplay\fP\^, \^int \fIscreen_number\fP\^);

.HP

char *DisplayString\^(\^Display *\fIdisplay\fP\^);

.HP

long XMaxRequestSize(\^Display *\fIdisplay\fP\^)

.HP

long XExtendedMaxRequestSize(\^Display *\fIdisplay\fP\^)

.HP

unsigned long LastKnownRequestProcessed\^(\^Display *\fIdisplay\fP\^); 

.HP

unsigned long NextRequest\^(\^Display *\fIdisplay\fP\^); 

.HP

int ProtocolVersion\^(\^Display *\fIdisplay\fP\^); 

.HP

int ProtocolRevision\^(\^Display *\fIdisplay\fP\^); 

.HP

int QLength\^(\^Display *\fIdisplay\fP\^); 

.HP

Window RootWindow\^(\^Display *\fIdisplay\fP\^, \^int \fIscreen_number\fP\^); 

.HP

int ScreenCount\^(\^Display *\fIdisplay\fP\^); 

.HP

Screen *ScreenOfDisplay\^(\^Display *\fIdisplay\fP, int

\fIscreen_number\fP\^); 

.HP

char *ServerVendor\^(\^Display *\fIdisplay\fP\^)

.HP

int VendorRelease\^(\^Display *\fIdisplay\fP\^)

.SH ARGUMENTS

.IP \fIdisplay\fP 1i

Specifies the connection to the X server.

.IP \fIscreen_number\fP 1i

Specifies the appropriate screen number on the host server.

.ds Cn depths

.IP \fIcount_return\fP 1i

Returns the number of \*(Cn.

.SH DESCRIPTION

The

.ZN AllPlanes

macro returns a value with all bits set to 1 suitable for use in a plane 

argument to a procedure.

.LP

The

.ZN BlackPixel

macro returns the black pixel value for the specified screen.

.LP

The

.ZN WhitePixel

macro returns the white pixel value for the specified screen.

.LP

The

.ZN ConnectionNumber

macro returns a connection number for the specified display.

.LP

The

.ZN DefaultColormap

macro returns the default colormap ID for allocation on the specified screen.

.LP

The

.ZN DefaultDepth

macro returns the depth (number of planes) of the default root window for the

specified screen.

.LP

The

.ZN XListDepths

function returns the array of depths 

that are available on the specified screen.

If the specified screen_number is valid and sufficient memory for the array

can be allocated,

.ZN XListDepths

sets count_return to the number of available depths.

Otherwise, it does not set count_return and returns NULL.

To release the memory allocated for the array of depths, use

.ZN XFree .

.LP

The

.ZN DefaultGC

macro returns the default GC for the root window of the

specified screen.

.LP

The

.ZN DefaultRootWindow

macro returns the root window for the default screen.

.LP

The

.ZN DefaultScreenOfDisplay

macro returns the default screen of the specified display.

.LP

The

.ZN DefaultScreen

macro returns the default screen number referenced in the

.ZN XOpenDisplay

routine.

.LP

The

.ZN DefaultVisual

macro returns the default visual type for the specified screen.

.LP

The

.ZN DisplayCells

macro returns the number of entries in the default colormap.

.LP

The

.ZN DisplayPlanes

macro returns the depth of the root window of the specified screen.

.LP

The

.ZN DisplayString

macro returns the string that was passed to

.ZN XOpenDisplay

when the current display was opened.

.LP

The

.ZN XMaxRequestSize

function returns the maximum request size (in 4-byte units) supported

by the server without using an extended-length protocol encoding.

Single protocol requests to the server can be no larger than this size

unless an extended-length protocol encoding is supported by the server.

The protocol guarantees the size to be no smaller than 4096 units

(16384 bytes).

Xlib automatically breaks data up into multiple protocol requests

as necessary for the following functions:

.ZN XDrawPoints ,

.ZN XDrawRectangles ,

.ZN XDrawSegments ,

.ZN XFillArcs ,

.ZN XFillRectangles ,

and 

.ZN XPutImage .

.LP

The

.ZN XExtendedMaxRequestSize

function returns zero if the specified display does not support an

extended-length protocol encoding; otherwise,

it returns the maximum request size (in 4-byte units) supported

by the server using the extended-length encoding.

The Xlib functions

.ZN XDrawLines ,

.ZN XDrawArcs ,

.ZN XFillPolygon ,

.ZN XChangeProperty ,

.ZN XSetClipRectangles ,

and

.ZN XSetRegion

will use the extended-length encoding as necessary, if supported

by the server.  Use of the extended-length encoding in other Xlib

functions (for example,

.ZN XDrawPoints ,

.ZN XDrawRectangles ,

.ZN XDrawSegments ,

.ZN XFillArcs ,

.ZN XFillRectangles ,

.ZN XPutImage )

is permitted but not required; an Xlib implementation may choose to

split the data across multiple smaller requests instead.

.LP

The

.ZN LastKnownRequestProcessed

macro extracts the full serial number of the last request known by Xlib

to have been processed by the X server.

.LP

The

.ZN NextRequest

macro extracts the full serial number that is to be used for the next request.

.LP

The

.ZN ProtocolVersion

macro returns the major version number (11) of the X protocol associated with

the connected display.

.LP

The

.ZN ProtocolRevision

macro returns the minor protocol revision number of the X server.

.LP

The

.ZN QLength

macro returns the length of the event queue for the connected display.

.LP

The

.ZN RootWindow

macro returns the root window.

.LP

The

.ZN ScreenCount

macro returns the number of available screens.

.LP

The

.ZN ScreenOfDisplay

macro returns a pointer to the screen of the specified display.

.LP

The

.ZN ServerVendor

macro returns a pointer to a null-terminated string that provides

some identification of the owner of the X server implementation.

.LP

The

.ZN VendorRelease

macro returns a number related to a vendor's release of the X server.

.SH "SEE ALSO"

BlackPixelOfScreen(__libmansuffix__),

ImageByteOrder(__libmansuffix__),

IsCursorKey(__libmansuffix__),

XOpenDisplay(__libmansuffix__)

.br

\fI\*(xL\fP