diff options
Diffstat (limited to 'nx-X11/lib/Xrandr/Xrandr.man')
| -rw-r--r-- | nx-X11/lib/Xrandr/Xrandr.man | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/nx-X11/lib/Xrandr/Xrandr.man b/nx-X11/lib/Xrandr/Xrandr.man new file mode 100644 index 000000000..f61d93044 --- /dev/null +++ b/nx-X11/lib/Xrandr/Xrandr.man @@ -0,0 +1,351 @@ +.\" +.\" $XFree86: xc/lib/Xrandr/Xrandr.man,v 1.7 2003/08/04 10:32:21 eich Exp $ +.\" $XdotOrg: xc/lib/Xrandr/Xrandr.man,v 1.4 2005/10/13 02:56:42 alanc Exp $ +.\" +.\" Copyright 2002 Hewlett-Packard Company.\" +.\" Permission to use, copy, modify, distribute, and sell this software and its +.\" documentation for any purpose is hereby granted without fee, provided that +.\" the above copyright notice appear in all copies and that both that +.\" copyright notice and this permission notice appear in supporting +.\" documentation, and that the name of Hewlett-Packard Company not be used in +.\" advertising or publicity pertaining to distribution of the software without +.\" specific, written prior permission. Hewlett Packard Company makes no +.\" representations about the suitability of this software for any purpose. It +.\" is provided "as is" without express or implied warranty. +.\" +.\" Hewlett-Packard DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, +.\" INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO +.\" EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR +.\" CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, +.\" DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER +.\" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +.\" PERFORMANCE OF THIS SOFTWARE. +.\" +.de TQ +.br +.ns +.TP \\$1 +.. +.TH XRANDR __libmansuffix__ __vendorversion__ + +.SH NAME + Xrandr \- X Resize, Rotate and Reflection extension. +.SH SYNTAX +\&#include <X11/extensions/Xrandr.h> +.nf +.sp +Bool XRRQueryExtension \^(\^Display *\fIdpy\fP, + int *\fIevent_basep\fP, int *\fIerror_basep\fP\^); +.sp +Status XRRQueryVersion \^(\^Display *\fIdpy\fP, + int *\fImajor_versionp\fP, + int *\fIminor_versionp\fP\^); +.sp +XRRScreenConfiguration *XRRGetScreenInfo \^(\^Display *dpy, + Drawable \fIdraw\fP\^); +.sp +void XRRFreeScreenConfigInfo \^(\^ + \fIXRRScreenConfiguration *config\fP\^); +.sp +Status XRRSetScreenConfig \^(\^Display *\fIdpy\fP, + XRRScreenConfiguration *\fIconfig\fP, + Drawable \fIdraw\fP, + int \fIsize_index\fP, + Rotation \fIrotation\fP, + Time \fItimestamp\fP\^); +.sp +Status XRRSetScreenConfigAndRate \^(\^Display *\fIdpy\fP, + XRRScreenConfiguration *\fIconfig\fP, + Drawable \fIdraw\fP, + int \fIsize_index\fP, + Rotation \fIrotation\fP, + short \fIrate\fP, + Time \fItimestamp\fP\^); +.sp +Rotation XRRConfigRotations\^(\^ + XRRScreenConfiguration *\fIconfig\fP, + Rotation *\fIcurrent_rotation\fP\^); +.sp +Time XRRConfigTimes \^(\^ + XRRScreenConfiguration *\fIconfig\fP, + Time *\fIconfig_timestamp\fP\^); +.sp +XRRScreenSize *XRRConfigSizes\^(\^ + XRRScreenConfiguration *\fIconfig\fP, + int *\fInsizes\fP\^); +.sp +short *XRRConfigRates \^(\^ + XRRScreenConfiguration *\fIconfig\fP, + int \fIsize_index\fP, + int *\fInrates\fP\^); +.sp +SizeID XRRConfigCurrentConfiguration \^(\^ + XRRScreenConfiguration *\fIconfig\fP, + Rotation *\fIrotation\fP\^); +.sp +short XRRConfigCurrentRate \^(\^ + XRRScreenConfiguration *\fIconfig\fP\^); +.sp +int XRRRootToScreen\^(\^ + Display *\fIdpy\fP, + Window \fIroot\fP\^); +.sp +XRRScreenConfiguration *XRRScreenConfig\^(\^ + Display *\fIdpy\fP, int \fIscreen\fP\^); +.sp +XRRScreenConfiguration *XRRConfig\^(\^Screen *\fIscreen\fP\^); +.sp +void XRRSelectInput\^(\^Display *\fIdpy\fP, Window \fIwindow\fP, int \fImask\fP\^); +.sp +/\(** + * intended to take RRScreenChangeNotify, or + * ConfigureNotify \^(\^\fIon the root window\fP\^) + * returns 1 if it is an event type it understands, 0 if not + */ +int XRRUpdateConfiguration\^(\^XEvent *\fIevent\fP^); +.sp +/\(** + * the following are always safe to call, even if RandR is + * not implemented on a screen + */ +.br +Rotation XRRRotations\^(\^ + Display *\fIdpy\fP, int \fIscreen\fP, + Rotation *\fIcurrent_rotation\fP\^); +.sp +XRRScreenSize *XRRSizes\^(\^Display *\fIdpy\fP, + int \fIscreen\fP, int *\fInsizes\fP\^); +.sp +short *XRRRates \^(\^Display *\fIdpy\fP, int \fIscreen\fP, + int \fIsize_index\fP, int *\fInrates\fP\^); +.sp +Time XRRTimes \^(\^Display *\fIdpy\fP, int \fIscreen\fP, Time *\fIconfig_timestamp\fP\^); +.fi +.SH ARGUMENTS +.IP \fIdisplay\fP 1i +Specifies the connection to the X server. +.IP \fIscreen\fP 1i +Specifies which screen. +.IP \fIdraw\fP 1i +Specifies the screen. +.IP \fIrotation\fP 1i +Specifies the rotations or reflections possible of the screen. +.IP \fIcurrent_rotation\fP 1i +Specifies the current rotations and reflection of the screen. +.IP \fItimestamp\fP 1i +Specifies the server timestamp. +.IP \fIconfig_timestamp\fP 1i +Specifies the timestamp when the screen was last (re)configured. +.IP \fIconfig\fP 1i +Specifies the screen configuration being used. +.IP \fIsizes\fP 1i +Specifies the array of sizes supported. +.IP \fIrate\fP 1i +Specifies the refresh rate in Hz. + +.SH DATATYPES + +.PP +.B Rotations/Reflections +.PP +Can be any of: +.nf +\&#define RR_Rotate_0 1 +\&#define RR_Rotate_90 2 +\&#define RR_Rotate_180 4 +\&#define RR_Rotate_270 8 + +/\(** new in 1.0 protocol, to allow reflection of screen */ +/\(** reflection is applied after rotation */ + +\&#define RR_Reflect_X 16 +\&#define RR_Reflect_Y 32 + + +typedef struct { + int width, height; + int mwidth, mheight; +} XRRScreenSize; + +typedef struct { + int type; /\(** event base */ + unsigned long serial; /\(** # of last request processed by server */ + Bool send_event; /\(** true if this came from a SendEvent request */ + Display *display; /\(** Display the event was read from */ + Window window; /\(** window which selected for this event */ + Window root; /\(** Root window for changed screen */ + Time timestamp; /\(** when the screen change occurred */ + Time config_timestamp; /\(** when the last configuration change */ + SizeID size_index; + SubpixelOrder subpixel_order; + Rotation rotation; + int width; + int height; + int mwidth; + int mheight; +} XRRScreenChangeNotifyEvent; +.sp +.fi +.B XRRScreenSize +structure contains a possible root size in pixels and in millimeters. +.B XRRScreenChangeNotifyEvent +Is sent to a client that has requested notification whenever the screen +configuration is changed. + +.B XRRScreenConfiguration +This is an opaque data type containing the configuration information +for a screen. + +.B Timestamps +.PP +Time stamps are included and must be used to ensure the client is playing +with a full deck: the screen may change properties +on the fly and this ensures its knowledge of the configuration is up to date. +This is to help issues when screens may become hot-pluggable in the future. + +.SH DESCRIPTION +.B Xrandr +is a simple library designed to interface the X Resize and Rotate +Extension. This allows clients to change the size and rotation of the +root window of a screen, along with the ability to reflect the screen +about either axis (if supported by the implementation). Rotation and +reflection may be implemented by software and may result in slower +performance if rotation and reflection are implemented in this fashion +(as are all implementations as of October 2002). +.PP +The Xrandr library does some minimal caching to avoid roundtrips to +provide clients frequently used information. See "The X Resize and +Rotate Extension" for a detailed description; also note that depth +switching, as described in the document is not implemented, and may +(or may not) ever be implemented, as display memory is growing rapidly, +and toolkits are already beginning to support migration, mitigating the +need for depth switching. If it is implemented in the future, we +expect to do so via an upward compatible extension to the +current library/protocol; functionality described here should continue +to work. +.PP +Rotation and reflection and how they interact can be confusing. In +Randr, the coordinate system is rotated in a counter-clockwise +direction relative to the normal orientation. Reflection is along the +window system coordinate system, not the physical screen X and Y axis, +so that rotation and reflection do not interact. The other way to +consider reflection is to is specified in the "normal" orientation, +before rotation, if you find the other way confusing. +.PP +The +.B XRRScreenChangeNotify +event is sent to clients that ask to be informed whenever the root window +configuration changes. Configuration changes may include resolution, +physical size, subpixel order (see XRender(3)), and rotation. Note +that changes to any or all of these could occur due to external events +(user control in the X server, a different monitor/flat panel display +being hot-plugged) and is not only the result of a protocol/library +request to the X server. +.PP +Additionally, to eliminate a potential race condition, +this event may be generated +immediately upon selecting for notification if the screen has changed +since the client of Xrandr connected to the X server, to enable +reliable screen resolution changing when a user may log in and +change the configuration while one or many clients are starting up. +.PP +.B Xlib notification +.PP +Clients must call back into Xlib using +.B XRRUpdateConfiguration +when screen configuration change notify events are generated +(or root window configuration changes occur, to update Xlib's +view of the resolution, size, rotation, reflection or subpixel order. +Generally, toolkits will perform this operation on behalf of applications; +we did not want to change display structure data behind the back of toolkits, +as in multithreaded clients, various race conditions might occur. +Toolkits should provide clients some mechanism for notification of +screen change, of course. + +.SH FUNCTIONS +There are two classes of interfaces: those which can be safely called +even if RandR is not implemented on a screen (to make common idioms not +dependent on the server having support), and those which will return +errors if the extension is not present. +.PP +.B XRRRotations +returns both the possible set of rotations/reflections supported +(as a bitmask) as the value of the function, along with the current +rotation/reflection of the screen. +.PP +.B XRRSizes +returns the size and a pointer to the current sizes supported by +the specified screen. The first size specified is the default size +of the server. If RandR is not supported, it returns 0 for +the number of sizes. +.PP +.B XRRRates +returns a pointer to a the rates supported by the specified size. +If RandR is not supported, it returns 0 for the number of rates. +.PP +.B XRRTimes +returns the time last reported by the server along with the +timestamp the last configuration changed. +If the configuration has changed since the client last updated +its view of the server time, requests to change the configuration +will fail until the client has an up to date timestamp. +.PP +.B XRRRootToScreen +returns the screen number given a root window (for example, from +an \fBXRRScreenChangeNotifyEvent\fI. +.PP +The rest of the functions will fail if applied to screens not +implementing the RandR extension. +.B XRRSetScreenConfig +sets the screen size and rotation and reflection to the desired +values on the screen specified by \fIdraw\fP, or returns a +.B BadValue +error. +\fIsize_index\fP specifies which size configuration is to be used, +\fIrotation\fP specifies which rotation or reflection is to +be used (or a +.B BadValue +error is returned). +The \fItimestamp\fP is used by the server to make sure the client +has up to date configuration information. Status is returned +to indicate success or failure; a client must refresh its configuration +information if it fails and try the call again (by calling +\fBXRRGetScreenInfo\fP). +.PP +.B XRRSetScreenConfigAndRate +like +.B XRRSetScreenConfig +but also set the refresh rate. If specified rate is not supported a +.B BadValue +error is returned. +.PP +.B XRRConfigRotations, +.B XRRConfigSizes, +.B XRRConfigCurrentConfiguration, +.B XRRConfigTimes, +.B XRRConfigRates, +and +.B XRRConfigCurrentRate +are used to get specific configuration information out of a screen +configuration. +.PP +.B XRRGetScreenInfo +Returns a screen configuration for later use; the information is +private to the library. +Call +.B XRRFreeScreenConfigInfo +to free this information when you are finished with it. +It forces a round trip to the server. + +Other functions include: +.B XRRQueryExtension +which returns the event and error base codes, +.B XRRQueryVersion +, which returns the current version of the extension (this information +is cached by the library). +.SH RESTRICTIONS +.B Xrandr +will remain upward compatible after the current 1.0 release. +.SH AUTHOR +Jim Gettys, and Keith Packard, HP. + |