314 lines
6.6 KiB
Groff
314 lines
6.6 KiB
Groff
'\" t
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining
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.\" a copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation the rights to use, copy, modify, merge, publish,
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.\" distribute, sublicense, and/or sell copies of the Software, and to
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.\" permit persons to whom the Software is furnished to do so, subject to
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.\" the following conditions:
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.\"
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.\" The above copyright notice and this permission notice shall be included
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.\" in all copies or substantial portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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.\" OTHER DEALINGS IN THE SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of the X Consortium shall
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.\" not be used in advertising or otherwise to promote the sale, use or
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.\" other dealings in this Software without prior written authorization
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.\" from the X Consortium.
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.\"
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
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.\" Digital Equipment Corporation
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.\"
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.\" Portions Copyright \(co 1990, 1991 by
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.\" Tektronix, Inc.
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.\"
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.\" Permission to use, copy, modify and distribute this documentation for
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.\" any purpose and without fee is hereby granted, provided that the above
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.\" copyright notice appears in all copies and that both that copyright notice
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.\" and this permission notice appear in all copies, and that the names of
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.\" Digital and Tektronix not be used in in advertising or publicity pertaining
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.\" to this documentation without specific, written prior permission.
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.\" Digital and Tektronix makes no representations about the suitability
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.\" of this documentation for any purpose.
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.\" It is provided ``as is'' without express or implied warranty.
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.\"
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.\"
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xW Athena X Widgets \- C Language X Toolkit Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.na
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.de Ds
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.nf
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.\\$1D \\$2 \\$1
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.ft 1
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.D
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.\" choose appropriate monospace font
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.\" the imagen conditional, 480,
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.\" heavy for your eyes...
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.\"
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.ie "\\*(.T"480" .ft L
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.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2
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.ny0
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'\" t
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.TH XGetVisualInfo __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XGetVisualInfo, XMatchVisualInfo, XVisualIDFromVisual, XVisualInfo \- obtain visual information and visual structure
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.SH SYNTAX
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.HP
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XVisualInfo *XGetVisualInfo\^(\^Display *\fIdisplay\fP\^, long
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\fIvinfo_mask\fP\^, XVisualInfo *\fIvinfo_template\fP\^, int
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*\fInitems_return\fP\^);
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.HP
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Status XMatchVisualInfo\^(\^Display *\fIdisplay\fP\^, int \fIscreen\fP\^, int
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\fIdepth\fP\^, int \fIclass\fP\^, XVisualInfo *\fIvinfo_return\fP\^);
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.HP
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VisualID XVisualIDFromVisual\^(\^Visual *\^\fIvisual\fP\^);
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.SH ARGUMENTS
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.IP \fIclass\fP 1i
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Specifies the class of the screen.
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.IP \fIdepth\fP 1i
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Specifies the depth of the screen.
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.IP \fIdisplay\fP 1i
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Specifies the connection to the X server.
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.IP \fInitems_return\fP 1i
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Returns the number of matching visual structures.
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.IP \fIscreen\fP 1i
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Specifies the screen.
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.IP \fIvisual\fP 1i
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Specifies the visual type.
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.IP \fIvinfo_mask\fP 1i
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Specifies the visual mask value.
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.IP \fIvinfo_return\fP 1i
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Returns the matched visual information.
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.IP \fIvinfo_template\fP 1i
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Specifies the visual attributes that are to be used in matching the visual
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structures.
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.SH DESCRIPTION
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The
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.ZN XGetVisualInfo
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function returns a list of visual structures that have attributes
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equal to the attributes specified by vinfo_template.
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If no visual structures match the template using the specified vinfo_mask,
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.ZN XGetVisualInfo
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returns a NULL.
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To free the data returned by this function, use
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.ZN XFree .
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.LP
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The
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.ZN XMatchVisualInfo
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function returns the visual information for a visual that matches the specified
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depth and class for a screen.
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Because multiple visuals that match the specified depth and class can exist,
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the exact visual chosen is undefined.
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If a visual is found,
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.ZN XMatchVisualInfo
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returns nonzero and the information on the visual to vinfo_return.
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Otherwise, when a visual is not found,
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.ZN XMatchVisualInfo
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returns zero.
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.LP
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The
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.ZN XVisualIDFromVisual
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function returns the visual ID for the specified visual type.
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.SH STRUCTURES
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The
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.ZN XVisualInfo
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structure contains:
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.LP
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.LP
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/\&* Visual information mask bits */
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.TS
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lw(.5i) lw(2.5i) lw(.8i).
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T{
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\&#define
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T} T{
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.ZN VisualNoMask
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T} T{
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0x0
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T}
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T{
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\&#define
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T} T{
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.ZN VisualIDMask
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T} T{
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0x1
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T}
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T{
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\&#define
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T} T{
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.ZN VisualScreenMask
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T} T{
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0x2
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T}
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T{
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\&#define
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T} T{
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.ZN VisualDepthMask
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T} T{
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0x4
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T}
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T{
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\&#define
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T} T{
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.ZN VisualClassMask
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T} T{
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0x8
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T}
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T{
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\&#define
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T} T{
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.ZN VisualRedMaskMask
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T} T{
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0x10
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T}
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T{
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\&#define
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T} T{
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.ZN VisualGreenMaskMask
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T} T{
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0x20
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T}
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T{
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\&#define
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T} T{
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.ZN VisualBlueMaskMask
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T} T{
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0x40
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T}
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T{
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\&#define
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T} T{
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.ZN VisualColormapSizeMask
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T} T{
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0x80
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T}
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T{
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\&#define
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T} T{
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.ZN VisualBitsPerRGBMask
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T} T{
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0x100
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T}
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T{
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\&#define
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T} T{
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.ZN VisualAllMask
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T} T{
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0x1FF
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T}
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.TE
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.IN "XVisualInfo" "" "@DEF@"
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.Ds 0
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.TA .5i 3i
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.ta .5i 3i
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/\&* Values */
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typedef struct {
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Visual *visual;
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VisualID visualid;
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int screen;
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int depth;
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int class;
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unsigned long red_mask;
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unsigned long green_mask;
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unsigned long blue_mask;
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int colormap_size;
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int bits_per_rgb;
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} XVisualInfo;
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.De
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.SH "SEE ALSO"
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XFree(__libmansuffix__)
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.br
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\fI\*(xL\fP
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