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diff --git a/libX11/man/XDrawArc.man b/libX11/man/XDrawArc.man new file mode 100644 index 000000000..af2527678 --- /dev/null +++ b/libX11/man/XDrawArc.man @@ -0,0 +1,341 @@ +'\" e +.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium +.\" +.\" Permission is hereby granted, free of charge, to any person obtaining +.\" a copy of this software and associated documentation files (the +.\" "Software"), to deal in the Software without restriction, including +.\" without limitation the rights to use, copy, modify, merge, publish, +.\" distribute, sublicense, and/or sell copies of the Software, and to +.\" permit persons to whom the Software is furnished to do so, subject to +.\" the following conditions: +.\" +.\" The above copyright notice and this permission notice shall be included +.\" in all copies or substantial portions of the Software. +.\" +.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR +.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +.\" OTHER DEALINGS IN THE SOFTWARE. +.\" +.\" Except as contained in this notice, the name of the X Consortium shall +.\" not be used in advertising or otherwise to promote the sale, use or +.\" other dealings in this Software without prior written authorization +.\" from the X Consortium. +.\" +.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by +.\" Digital Equipment Corporation +.\" +.\" Portions Copyright \(co 1990, 1991 by +.\" Tektronix, Inc. +.\" +.\" Permission to use, copy, modify and distribute this documentation for +.\" any purpose and without fee is hereby granted, provided that the above +.\" copyright notice appears in all copies and that both that copyright notice +.\" and this permission notice appear in all copies, and that the names of +.\" Digital and Tektronix not be used in in advertising or publicity pertaining +.\" to this documentation without specific, written prior permission. +.\" Digital and Tektronix makes no representations about the suitability +.\" of this documentation for any purpose. +.\" It is provided ``as is'' without express or implied warranty. +.\" +.\" $XFree86: xc/doc/man/X11/XDrArc.man,v 1.4 2003/04/28 22:17:54 herrb Exp $ +.\" $XdotOrg: lib/X11/man/XDrawArc.man,v 1.3 2005-08-17 01:27:08 alanc Exp $ +.\" +.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 +.de Ds +.nf +.\\$1D \\$2 \\$1 +.ft 1 +.\".ps \\n(PS +.\".if \\n(VS>=40 .vs \\n(VSu +.\".if \\n(VS<=39 .vs \\n(VSp +.. +.de De +.ce 0 +.if \\n(BD .DF +.nr BD 0 +.in \\n(OIu +.if \\n(TM .ls 2 +.sp \\n(DDu +.fi +.. +.de FD +.LP +.KS +.TA .5i 3i +.ta .5i 3i +.nf +.. +.de FN +.fi +.KE +.LP +.. +.de IN \" send an index entry to the stderr +.. +.de C{ +.KS +.nf +.D +.\" +.\" choose appropriate monospace font +.\" the imagen conditional, 480, +.\" may be changed to L if LB is too +.\" heavy for your eyes... +.\" +.ie "\\*(.T"480" .ft L +.el .ie "\\*(.T"300" .ft L +.el .ie "\\*(.T"202" .ft PO +.el .ie "\\*(.T"aps" .ft CW +.el .ft R +.ps \\n(PS +.ie \\n(VS>40 .vs \\n(VSu +.el .vs \\n(VSp +.. +.de C} +.DE +.R +.. +.de Pn +.ie t \\$1\fB\^\\$2\^\fR\\$3 +.el \\$1\fI\^\\$2\^\fP\\$3 +.. +.de ZN +.ie t \fB\^\\$1\^\fR\\$2 +.el \fI\^\\$1\^\fP\\$2 +.. +.de hN +.ie t <\fB\\$1\fR>\\$2 +.el <\fI\\$1\fP>\\$2 +.. +.de NT +.ne 7 +.ds NO Note +.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2 +.if \\n(.$ .if !'\\$1'C' .ds NO \\$1 +.ie n .sp +.el .sp 10p +.TB +.ce +\\*(NO +.ie n .sp +.el .sp 5p +.if '\\$1'C' .ce 99 +.if '\\$2'C' .ce 99 +.in +5n +.ll -5n +.R +.. +. \" Note End -- doug kraft 3/85 +.de NE +.ce 0 +.in -5n +.ll +5n +.ie n .sp +.el .sp 10p +.. +.ny0 +.de EX +.sp +.nf +.ft CW +.. +.de EE +.ft R +.fi +.sp +.. +'\" e +.TH XDrawArc __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS" +.SH NAME +XDrawArc, XDrawArcs, XArc \- draw arcs and arc structure +.SH SYNTAX +.HP +int XDrawArc\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC \fIgc\fP\^, +int \fIx\fP\^, int \fIy\fP\^, unsigned int \fIwidth\fP\^, unsigned int +\fIheight\fP\^, int \fIangle1\fP\^, int \fIangle2\fP\^); +.HP +int XDrawArcs\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC \fIgc\fP\^, +XArc *\fIarcs\fP\^, int \fInarcs\fP\^); +.SH ARGUMENTS +.IP \fIangle1\fP 1i +Specifies the start of the arc relative to the three-o'clock position +from the center, in units of degrees * 64. +.IP \fIangle2\fP 1i +Specifies the path and extent of the arc relative to the start of the +arc, in units of degrees * 64. +.IP \fIarcs\fP 1i +Specifies an array of arcs. +.IP \fId\fP 1i +Specifies the drawable. +.IP \fIdisplay\fP 1i +Specifies the connection to the X server. +.IP \fIgc\fP 1i +Specifies the GC. +.IP \fInarcs\fP 1i +Specifies the number of arcs in the array. +.ds Wh , which are the major and minor axes of the arc +.IP \fIwidth\fP 1i +.br +.ns +.IP \fIheight\fP 1i +Specify the width and height\*(Wh. +.ds Xy , which are relative to the origin of the drawable \ +and specify the upper-left corner of the bounding rectangle +.IP \fIx\fP 1i +.br +.ns +.IP \fIy\fP 1i +Specify the x and y coordinates\*(Xy. +.SH DESCRIPTION +.EQ +delim %% +.EN +.ZN XDrawArc +draws a single circular or elliptical arc, and +.ZN XDrawArcs +draws multiple circular or elliptical arcs. +Each arc is specified by a rectangle and two angles. +The center of the circle or ellipse is the center of the +rectangle, and the major and minor axes are specified by the width and height. +Positive angles indicate counterclockwise motion, +and negative angles indicate clockwise motion. +If the magnitude of angle2 is greater than 360 degrees, +.ZN XDrawArc +or +.ZN XDrawArcs +truncates it to 360 degrees. +.LP +For an arc specified as %[ ~x, ~y, ~width , ~height, ~angle1, ~angle2 ]%, +the origin of the major and minor axes is at +% [ x +^ {width over 2} , ~y +^ {height over 2} ]%, +and the infinitely thin path describing the entire circle or ellipse +intersects the horizontal axis at % [ x, ~y +^ {height over 2} ]% and +% [ x +^ width , ~y +^ { height over 2 }] % +and intersects the vertical axis at % [ x +^ { width over 2 } , ~y ]% and +% [ x +^ { width over 2 }, ~y +^ height ]%. +These coordinates can be fractional +and so are not truncated to discrete coordinates. +The path should be defined by the ideal mathematical path. +For a wide line with line-width lw, +the bounding outlines for filling are given +by the two infinitely thin paths consisting of all points whose perpendicular +distance from the path of the circle/ellipse is equal to lw/2 +(which may be a fractional value). +The cap-style and join-style are applied the same as for a line +corresponding to the tangent of the circle/ellipse at the endpoint. +.LP +For an arc specified as % [ ~x, ~y, ~width, ~height, ~angle1, ~angle2 ]%, +the angles must be specified +in the effectively skewed coordinate system of the ellipse (for a +circle, the angles and coordinate systems are identical). The +relationship between these angles and angles expressed in the normal +coordinate system of the screen (as measured with a protractor) is as +follows: +.LP +.Ds +% roman "skewed-angle" ~ = ~ atan left ( tan ( roman "normal-angle" ) + * width over height right ) +^ adjust% +.De +.LP +The skewed-angle and normal-angle are expressed in radians (rather +than in degrees scaled by 64) in the range % [ 0 , ~2 pi ]% and where atan +returns a value in the range % [ - pi over 2 , ~pi over 2 ] % +and adjust is: +.LP +.TS +l l. +%0% for normal-angle in the range % [ 0 , ~pi over 2 ]% +%pi% for normal-angle in the range % [ pi over 2 , ~{3 pi} over 2 ]% +%2 pi% for normal-angle in the range % [ {3 pi} over 2 , ~2 pi ]% +.TE +.LP +For any given arc, +.ZN XDrawArc +and +.ZN XDrawArcs +do not draw a pixel more than once. +If two arcs join correctly and if the line-width is greater than zero +and the arcs intersect, +.ZN XDrawArc +and +.ZN XDrawArcs +do not draw a pixel more than once. +Otherwise, +the intersecting pixels of intersecting arcs are drawn multiple times. +Specifying an arc with one endpoint and a clockwise extent draws the same pixels +as specifying the other endpoint and an equivalent counterclockwise extent, +except as it affects joins. +.LP +If the last point in one arc coincides with the first point in the following +arc, the two arcs will join correctly. +If the first point in the first arc coincides with the last point in the last +arc, the two arcs will join correctly. +By specifying one axis to be zero, a horizontal or vertical line can be +drawn. +Angles are computed based solely on the coordinate system and ignore the +aspect ratio. +.LP +Both functions use these GC components: +function, plane-mask, line-width, line-style, cap-style, join-style, +fill-style, subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask. +They also use these GC mode-dependent components: +foreground, background, tile, stipple, tile-stipple-x-origin, +tile-stipple-y-origin, dash-offset, and dash-list. +.LP +.ZN XDrawArc +and +.ZN XDrawArcs +can generate +.ZN BadDrawable , +.ZN BadGC , +and +.ZN BadMatch +errors. +.SH STRUCTURES +The +.ZN XArc +structure contains: +.LP +.EX +typedef struct { + short x, y; + unsigned short width, height; + short angle1, angle2; /\&* Degrees * 64 */ +} XArc; +.EE +.LP +All x and y members are signed integers. +The width and height members are 16-bit unsigned integers. +You should be careful not to generate coordinates and sizes +out of the 16-bit ranges, because the protocol only has 16-bit fields +for these values. +.SH DIAGNOSTICS +.TP 1i +.ZN BadDrawable +A value for a Drawable argument does not name a defined Window or Pixmap. +.TP 1i +.ZN BadGC +A value for a GContext argument does not name a defined GContext. +.TP 1i +.ZN BadMatch +An +.ZN InputOnly +window is used as a Drawable. +.TP 1i +.ZN BadMatch +Some argument or pair of arguments has the correct type and range but fails +to match in some other way required by the request. +.SH "SEE ALSO" +XDrawLine(3X11), +XDrawPoint(3X11), +XDrawRectangle(3X11) +.br +\fI\*(xL\fP |