.\" $Xorg: XF86VM.man,v 1.3 2000/08/17 19:50:53 cpqbld Exp $ .\" .\" .\" .\" .\" Copyright (c) 1996 Joe Moss, The XFree86 Project .\" $XFree86: xc/programs/Xserver/hw/xfree86/doc/man/XF86VM.man,v 3.6.2.3 1998/02/26 13:59:05 dawes Exp $ .\" .de ZN .ie t \fB\^\\$1\^\fR\\$2 .el \fI\^\\$1\^\fP\\$2 .. .TH XF86VIDMODE 3X11 "3.3.2" "XFree86" "X FUNCTIONS" .SH NAME XF86VidModeQueryExtension, XF86VidModeQueryVersion, XF86VidModeGetModeLine, XF86VidModeGetAllModeLines, XF86VidModeDeleteModeLine, XF86VidModeModModeLine, XF86VidModeValidateModeLine, XF86VidModeSwitchMode, XF86VidModeSwitchToMode, XF86VidModeLockModeSwitch, XF86VidModeGetMonitor, XF86VidModeGetViewPort, XF86VidModeSetViewPort \- XFree86-VidMode extension interface functions .SH SYNTAX .nf .LP #include .LP Bool XF86VidModeQueryExtension( Display *\fIdisplay\fP\^, int *\fIevent_base_return\fP\^, int *\fIerror_base_return\fP\^); .LP Bool XF86VidModeQueryVersion( Display *\fIdisplay\fP\^, int *\fImajor_version_return\fP\^, int *\fIminor_version_return\fP\^); .LP Bool XF86VidModeGetModeLine( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, int *\fIdotclock_return\fP\^, XF86VidModeModeLine *\fImodeline\fP\^); .LP Bool XF86VidModeGetAllModeLines( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, int *\fImodecount_return\fP\^, XF86VidModeModeInfo **\fImodesinfo\fP\^); .ig .LP Bool XF86VidModeAddModeLine( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, XF86VidModeModeInfo *\fImodeline\fP\, XF86VidModeModeInfo *\fIaftermode\fP\^); .. .LP Bool XF86VidModeDeleteModeLine( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, XF86VidModeModeInfo *\fImodeline\fP\^); .LP Bool XF86VidModeModModeLine( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, XF86VidModeModeLine *\fImodeline\fP\^); .LP Status XF86VidModeValidateModeLine( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, XF86VidModeModeLine *\fImodeline\fP\^); .LP Bool XF86VidModeSwitchMode( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, int \fIzoom\fP\^); .LP Bool XF86VidModeSwitchToMode( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, XF86VidModeModeInfo *\fImodeline\fP\^); .LP Bool XF86VidModeLockModeSwitch( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, int \fIlock\fP\^); .LP Bool XF86VidModeGetMonitor( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, XF86VidModeMonitor *\fImonitor\fP\^); .LP Bool XF86VidModeGetViewPort( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, int *\fIx_return\fP\^, int *\fIy_return\fP\^); .LP Bool XF86VidModeSetViewPort( Display *\fIdisplay\fP\^, int \fIscreen\fP\^, int \fIx\fP\^, int \fIy\fP\^); .fi .SH ARGUMENTS .IP \fIdisplay\fP 2i Specifies the connection to the X server. .IP \fIscreen\fP 2i Specifies which screen number the setting apply to. .IP \fIevent_base_return\fP 2i Returns the base event number for the extension. .IP \fIerror_base_return\fP 2i Returns the base error number for the extension. .IP \fImajor_version_return\fP 2i Returns the major version number of the extension. .IP \fIminor_version_return\fP 2i Returns the minor version number of the extension. .IP \fIdotclock_return\fP 2i Returns the clock for the mode line. .IP \fImodecount_return\fP 2i Returns the number of video modes available in the server. .IP \fIzoom\fP 2i If greater than zero, indicates that the server should switch to the next mode, otherwise switch to the previous mode. .IP \fIlock\fP 2i Indicates that mode switching should be locked, if non-zero. .IP \fImodeline\fP 2i Specifies or returns the timing values for a video mode. .ig .IP \fIaftermode\fP 2i Specifies the timing values for the video mode after which the new mode will added. .. .IP \fImodesinfo\fP 2i Returns the timing values and dotclocks for all of the available video modes. .IP \fImonitor\fP 2i Returns information about the monitor. .IP \fIx\fP 2i Specifies the desired X location for the viewport. .IP \fIx_return\fP 2i Returns the current X location of the viewport. .IP \fIy\fP 2i Specifies the desired Y location for the viewport. .IP \fIy_return\fP 2i Returns the current Y location of the viewport. .SH STRUCTURES .nf .ta 2.25i 3.5i \fIVideo Mode Settings:\fP typedef struct { unsigned short hdisplay; /* Number of display pixels horizontally */ unsigned short hsyncstart; /* Horizontal sync start */ unsigned short hsyncend; /* Horizontal sync end */ unsigned short htotal; /* Total horizontal pixels */ unsigned short vdisplay; /* Number of display pixels vertically */ unsigned short vsyncstart; /* Vertical sync start */ unsigned short vsyncend; /* Vertical sync start */ unsigned short vtotal; /* Total vertical pixels */ unsigned int flags; /* Mode flags */ int privsize; /* Size of private */ INT32 *private; /* Server privates */ } XF86VidModeModeLine; .sp typedef struct { unsigned int dotclock; /* Pixel clock */ unsigned short hdisplay; /* Number of display pixels horizontally */ unsigned short hsyncstart; /* Horizontal sync start */ unsigned short hsyncend; /* Horizontal sync end */ unsigned short htotal; /* Total horizontal pixels */ unsigned short vdisplay; /* Number of display pixels vertically */ unsigned short vsyncstart; /* Vertical sync start */ unsigned short vsyncend; /* Vertical sync start */ unsigned short vtotal; /* Total vertical pixels */ unsigned int flags; /* Mode flags */ int privsize; /* Size of private */ INT32 *private; /* Server privates */ } XF86VidModeModeInfo; .LP \fIMonitor information:\fP typedef struct { char* vendor; /* Name of manufacturer */ char* model; /* Model name */ float bandwidth; /* Monitor bandwidth */ unsigned char nhsync; /* Number of horiz sync ranges */ XF86VidModeSyncRange* hsync; /* Horizontal sync ranges */ unsigned char nvsync; /* Number of vert sync ranges */ XF86VidModeSyncRange* vsync; /* Vertical sync ranges */ } XF86VidModeMonitor; .sp typedef struct { float hi; /* Top of range */ float lo; /* Bottom of range */ } XF86VidModeSyncRange; .fi .SH DESCRIPTION These functions provide an interface to the server extension \fIXFree86-VidModeExtension\fP which allows the video modes to be queried and adjusted dynamically and mode switching to be controlled. Applications that use these functions must be linked with .ZN -lXxf86vm .SS "MODELINE FUNCTIONS" The .ZN XF86VidModeGetModeLine function is used to query the settings for the currently selected video mode. The calling program should pass a pointer to a .ZN XF86VidModeModeLine structure that it has already allocated. The function fills in the fields of the structure. .PP If there are any server private values (currently only applicable to the S3 server) the function will allocate storage for them. Therefore, if the .ZN privsize field is non-zero, the calling program should call .ZN Xfree(private) to free the storage. .PP .ZN XF86VidModeGetAllModeLines returns the settings for all video modes. The calling program supplies the address of a pointer which will be set by the function to point to an array of .ZN XF86VidModeModeInfo structures. The memory occupied by the array is dynamically allocated by the .ZN XF86VidModeGetAllModeLines function and should be freed by the caller. The first element of the array corresponds to the current video mode. .PP The .ZN XF86VidModeModModeLine function can be used to change the settings of the current video mode provided the requested settings are valid (e.g. they don't exceed the capabilities of the monitor). .PP .ig To add a mode to the list of available modes, the .ZN XF86VidModeAddModeLine function can be used. Assuming the settings are valid, the video mode will be added after the existing mode which matches the timings specified by the .ZN aftermode parameter. To be considered a match, all of the fields of the given .ZN XF86VidModeModeInfo structure must match, except the .ZN privsize and .ZN private fields. If the .ZN aftermode parameter is zero, the mode will be added after the current mode. .PP .. Modes can be deleted with the .ZN XF86VidModeDeleteModeLine function. The specified mode must match an existing mode. To be considered a match, all of the fields of the given .ZN XF86VidModeModeInfo structure must match, except the .ZN privsize and .ZN private fields. If the mode to be deleted is the current mode, a mode switch to the next mode will occur first. The last remaining mode can not be deleted. .PP The validity of a mode can be checked with the .ZN XF86VidModeValidateModeLine function. If the specified mode can be used by the server (i.e. meets all the constraints placed upon a mode by the combination of the server, card, and monitor) the function returns .ZN MODE_OK , otherwise it returns a value indicating the reason why the mode is invalid (as defined in \fIxf86.h\fP) .SS "MODE SWITCH FUNCTIONS" When the function .ZN XF86VidModeSwitchMode is called, the server will change the video mode to next (or previous) video mode. The .ZN XF86VidModeSwitchToMode function can be used to switch directly to the specified mode. Matching is as specified in the description of the .ZN XF86VidModeDeleteModeLine function above. The .ZN XF86VidModeLockModeSwitch function can be used to allow or disallow mode switching whether the request to switch modes comes from a call to the .ZN XF86VidModeSwitchMode or .ZN XF86VidModeSwitchToMode functions or from one of the mode switch key sequences. .SS "MONITOR FUNCTIONS" Information known to the server about the monitor is returned by the .ZN XF86VidModeGetMonitor function. The .ZN hsync and .ZN vsync fields each point to an array of .ZN XF86VidModeSyncRange structures. The arrays contain .ZN nhsync and .ZN nvsync elements, respectively. The .ZN hi and .ZN low values will be equal if a discreate value was given in the .ZN XF86Config file. .PP The .ZN vendor , .ZN model , .ZN hsync , and .ZN vsync fields point to dynamically allocated storage that should be freed by the caller. .SS "VIEWPORT FUNCTIONS" The .ZN XF86VidModeGetViewPort and .ZN XF86VidModeSetViewPort functions can be used to, respectively, query and change the location of the upper left corner of the viewport into the virtual screen. .SS "OTHER FUNCTIONS" The .ZN XF86VidModeQueryVersion function can be used to determine the version of the extension built into the server. .PP The function .ZN XF86VidModeQueryExtension returns the lowest numbered error and event values assigned to the extension. .SH SEE ALSO XFree86(1), XF86Config(4/5), xvidtune(1) .SH AUTHORS Kaleb Keithley, Jon Tombs, David Dawes, and Joe Moss