[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / man / man3 / Tk_GetVisual.3

'\"
'\" Copyright (c) 1994 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\"
'\" See the file "license.terms" for information on usage and redistribution
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'\" 
'\" RCS: @(#) $Id: GetVisual.3,v 1.3 2002/08/05 04:30:38 dgp Exp $
'\" 
'\" The definitions below are for supplemental macros used in Tcl/Tk
'\" manual entries.
'\"
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'\"	type is type of argument (int, etc.), in/out is either "in", "out",
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'\"	and indent is equivalent to second arg of .IP (shouldn't ever be
'\"	needed;  use .AS below instead)
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'\" .AS ?type? ?name?
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'\"	name are examples of largest possible arguments that will be passed
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'\" .OP cmdName dbName dbClass
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'\"	option's name as specified in the class command, dbName gives
'\"	the option's name in the option database, and dbClass gives
'\"	the option's class in the option database.
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.TH Tk_GetVisual 3 4.0 Tk "Tk Library Procedures"
.BS
.SH NAME
Tk_GetVisual \- translate from string to visual
.SH SYNOPSIS
.nf
\fB#include <tk.h>\fR
.sp
Visual *
\fBTk_GetVisual(\fIinterp, tkwin, string, depthPtr, colormapPtr\fB)\fR
.SH ARGUMENTS
.AS "Tcl_Interp" *colormapPtr
.AP Tcl_Interp *interp in
Interpreter to use for error reporting.
.AP Tk_Window tkwin in
Token for window in which the visual will be used.
.AP "CONST char" *string in
String that identifies the desired visual.  See below for
valid formats.
.AP int *depthPtr out
Depth of returned visual gets stored here.
.AP Colormap *colormapPtr out
If non-NULL then a suitable colormap for visual is found and its
identifier is stored here.
.BE

.SH DESCRIPTION
.PP
\fBTk_GetVisual\fR takes a string description of a visual and
finds a suitable X Visual for use in \fItkwin\fR, if there is one.
It returns a pointer to the X Visual structure for the visual
and stores the number of bits per pixel for it at \fI*depthPtr\fR.
If \fIstring\fR is unrecognizable or if no suitable visual could
be found, then NULL is returned and \fBTk_GetVisual\fR leaves
an error message in \fIinterp->result\fR.
If \fIcolormap\fR is non-NULL then \fBTk_GetVisual\fR
also locates an appropriate colormap for use with the result visual
and stores its X identifier at \fI*colormapPtr\fR.
.PP
The \fIstring\fR argument specifies the desired visual in one
of the following ways:
.TP 15
\fIclass depth\fR
The string consists of a class name followed by an integer depth,
with any amount of white space (including none) in between.
\fIclass\fR selects what sort of visual is desired and must be one of
\fBdirectcolor\fR, \fBgrayscale\fR, \fBgreyscale\fR, \fBpseudocolor\fR,
\fBstaticcolor\fR, \fBstaticgray\fR, \fBstaticgrey\fR, or
\fBtruecolor\fR, or a unique abbreviation.
\fIdepth\fR specifies how many bits per pixel are needed for the
visual.
If possible, \fBTk_GetVisual\fR will return a visual with this depth;
if there is no visual of the desired depth then \fBTk_GetVisual\fR
looks first for a visual with greater depth, then one with less
depth.
.TP 15
\fBdefault\fR
Use the default visual for \fItkwin\fR's screen.
.TP 15
\fIpathName\fR
Use the visual for the window given by \fIpathName\fR.
\fIpathName\fR must be the name of a window on the same screen
as \fItkwin\fR.
.TP 15
\fInumber\fR
Use the visual whose X identifier is \fInumber\fR.
.TP 15
\fBbest\fR ?\fIdepth\fR?
Choose the ``best possible'' visual, using the following rules, in
decreasing order of priority:
(a) a visual that has exactly the desired depth is best, followed
by a visual with greater depth than requested (but as little extra
as possible), followed by a visual with less depth than requested
(but as great a depth as possible);
(b) if no \fIdepth\fR is specified, then the deepest available visual
is chosen;
(c) \fBpseudocolor\fR is better than \fBtruecolor\fR or \fBdirectcolor\fR,
which are better than \fBstaticcolor\fR, which is better than
\fBstaticgray\fR or \fBgrayscale\fR;
(d) the default visual for the screen is better than any other visual.

.SH CREDITS
.PP
The idea for \fBTk_GetVisual\fR, and the first implementation, came
from Paul Mackerras.

.SH KEYWORDS
colormap, screen, visual
Commit	Line	Data
920dae64 AT	1	'\"
	2	'\" Copyright (c) 1994 The Regents of the University of California.
	3	'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
	4	'\"
	5	'\" See the file "license.terms" for information on usage and redistribution
	6	'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
	7	'\"
	8	'\" RCS: @(#) $Id: GetVisual.3,v 1.3 2002/08/05 04:30:38 dgp Exp $
	9	'\"
	10	'\" The definitions below are for supplemental macros used in Tcl/Tk
	11	'\" manual entries.
	12	'\"
	13	'\" .AP type name in/out ?indent?
	14	'\" Start paragraph describing an argument to a library procedure.
	15	'\" type is type of argument (int, etc.), in/out is either "in", "out",
	16	'\" or "in/out" to describe whether procedure reads or modifies arg,
	17	'\" and indent is equivalent to second arg of .IP (shouldn't ever be
	18	'\" needed; use .AS below instead)
	19	'\"
	20	'\" .AS ?type? ?name?
	21	'\" Give maximum sizes of arguments for setting tab stops. Type and
	22	'\" name are examples of largest possible arguments that will be passed
	23	'\" to .AP later. If args are omitted, default tab stops are used.
	24	'\"
	25	'\" .BS
	26	'\" Start box enclosure. From here until next .BE, everything will be
	27	'\" enclosed in one large box.
	28	'\"
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	32	'\" .CS
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	37	'\"
	38	'\" .VS ?version? ?br?
	39	'\" Begin vertical sidebar, for use in marking newly-changed parts
	40	'\" of man pages. The first argument is ignored and used for recording
	41	'\" the version when the .VS was added, so that the sidebars can be
	42	'\" found and removed when they reach a certain age. If another argument
	43	'\" is present, then a line break is forced before starting the sidebar.
	44	'\"
	45	'\" .VE
	46	'\" End of vertical sidebar.
	47	'\"
	48	'\" .DS
	49	'\" Begin an indented unfilled display.
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	51	'\" .DE
	52	'\" End of indented unfilled display.
	53	'\"
	54	'\" .SO
	55	'\" Start of list of standard options for a Tk widget. The
	56	'\" options follow on successive lines, in four columns separated
	57	'\" by tabs.
	58	'\"
	59	'\" .SE
	60	'\" End of list of standard options for a Tk widget.
	61	'\"
	62	'\" .OP cmdName dbName dbClass
	63	'\" Start of description of a specific option. cmdName gives the
	64	'\" option's name as specified in the class command, dbName gives
65	'\" the option's name in the option database, and dbClass gives
66	'\" the option's class in the option database.
67	'\"
68	'\" .UL arg1 arg2
69	'\" Print arg1 underlined, then print arg2 normally.
70	'\"
71	'\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
72	'\"
73	'\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
74	.if t .wh -1.3i ^B
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79	.ie !"\\$4"" .TP \\$4
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107	..
108	.AS Tcl_Interp Tcl_CreateInterp in/out
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177	.el \h'-1.5n'\L'\|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'\|0u'\c
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207	.de SO
208	.SH "STANDARD OPTIONS"
209	.LP
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213	..
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219	See the \\fBoptions\\fR manual entry for details on the standard options.
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226	Command-Line Name: \\fB\\$1\\fR
227	Database Name: \\fB\\$2\\fR
228	Database Class: \\fB\\$3\\fR
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242	..
243	.de UL
244	\\$1\l'\|0\(ul'\\$2
245	..
246	.TH Tk_GetVisual 3 4.0 Tk "Tk Library Procedures"
247	.BS
248	.SH NAME
249	Tk_GetVisual \- translate from string to visual
250	.SH SYNOPSIS
251	.nf
252	\fB#include <tk.h>\fR
253	.sp
254	Visual *
255	\fBTk_GetVisual(\fIinterp, tkwin, string, depthPtr, colormapPtr\fB)\fR
256	.SH ARGUMENTS
257	.AS "Tcl_Interp" *colormapPtr
258	.AP Tcl_Interp *interp in
259	Interpreter to use for error reporting.
260	.AP Tk_Window tkwin in
261	Token for window in which the visual will be used.
262	.AP "CONST char" *string in
263	String that identifies the desired visual. See below for
264	valid formats.
265	.AP int *depthPtr out
266	Depth of returned visual gets stored here.
267	.AP Colormap *colormapPtr out
268	If non-NULL then a suitable colormap for visual is found and its
269	identifier is stored here.
270	.BE
271
272	.SH DESCRIPTION
273	.PP
274	\fBTk_GetVisual\fR takes a string description of a visual and
275	finds a suitable X Visual for use in \fItkwin\fR, if there is one.
276	It returns a pointer to the X Visual structure for the visual
277	and stores the number of bits per pixel for it at \fI*depthPtr\fR.
278	If \fIstring\fR is unrecognizable or if no suitable visual could
279	be found, then NULL is returned and \fBTk_GetVisual\fR leaves
280	an error message in \fIinterp->result\fR.
281	If \fIcolormap\fR is non-NULL then \fBTk_GetVisual\fR
282	also locates an appropriate colormap for use with the result visual
283	and stores its X identifier at \fI*colormapPtr\fR.
284	.PP
285	The \fIstring\fR argument specifies the desired visual in one
286	of the following ways:
287	.TP 15
288	\fIclass depth\fR
289	The string consists of a class name followed by an integer depth,
290	with any amount of white space (including none) in between.
291	\fIclass\fR selects what sort of visual is desired and must be one of
292	\fBdirectcolor\fR, \fBgrayscale\fR, \fBgreyscale\fR, \fBpseudocolor\fR,
293	\fBstaticcolor\fR, \fBstaticgray\fR, \fBstaticgrey\fR, or
294	\fBtruecolor\fR, or a unique abbreviation.
295	\fIdepth\fR specifies how many bits per pixel are needed for the
296	visual.
297	If possible, \fBTk_GetVisual\fR will return a visual with this depth;
298	if there is no visual of the desired depth then \fBTk_GetVisual\fR
299	looks first for a visual with greater depth, then one with less
300	depth.
301	.TP 15
302	\fBdefault\fR
303	Use the default visual for \fItkwin\fR's screen.
304	.TP 15
305	\fIpathName\fR
306	Use the visual for the window given by \fIpathName\fR.
307	\fIpathName\fR must be the name of a window on the same screen
308	as \fItkwin\fR.
309	.TP 15
310	\fInumber\fR
311	Use the visual whose X identifier is \fInumber\fR.
312	.TP 15
313	\fBbest\fR ?\fIdepth\fR?
314	Choose the ``best possible'' visual, using the following rules, in
315	decreasing order of priority:
316	(a) a visual that has exactly the desired depth is best, followed
317	by a visual with greater depth than requested (but as little extra
318	as possible), followed by a visual with less depth than requested
319	(but as great a depth as possible);
320	(b) if no \fIdepth\fR is specified, then the deepest available visual
321	is chosen;
322	(c) \fBpseudocolor\fR is better than \fBtruecolor\fR or \fBdirectcolor\fR,
323	which are better than \fBstaticcolor\fR, which is better than
324	\fBstaticgray\fR or \fBgrayscale\fR;
325	(d) the default visual for the screen is better than any other visual.
326
327	.SH CREDITS
328	.PP
329	The idea for \fBTk_GetVisual\fR, and the first implementation, came
330	from Paul Mackerras.
331
332	.SH KEYWORDS
333	colormap, screen, visual