XF86VM
NAME
XF86VidModeQueryExtension, XF86VidModeQueryVersion, XF86VidModeSetClientVersion, XF86VidModeGetModeLine, XF86VidModeGetAllModeLines, XF86VidModeDeleteModeLine, XF86VidModeModModeLine, XF86VidModeValidateModeLine, XF86VidModeSwitchMode, XF86VidModeSwitchToMode, XF86VidModeLockModeSwitch, XF86VidModeGetMonitor, XF86VidModeGetViewPort, XF86VidModeSetViewPort, XF86VidModeGetDotClocks, XF86VidModeGetGamma, XF86VidModeSetGamma, XF86VidModeGetGammaRamp, XF86VidModeSetGammaRamp, XF86VidModeGetGammaRampSize, XF86VidModeGetPermissions - Extension library for the XFree86-VidMode X extension
SYNTAX
#include <X11/extensions/xf86vmode.h>
Bool XF86VidModeQueryExtension(
Display *display\^,
int *event_base_return\^,
int *error_base_return\^);
Bool XF86VidModeQueryVersion(
Display *display\^,
int *major_version_return\^,
int *minor_version_return\^);
Bool XF86VidModeSetClientVersion(
Display *display\^);
Bool XF86VidModeGetModeLine(
Display *display\^,
int screen\^,
int *dotclock_return\^,
XF86VidModeModeLine *modeline\^);
Bool XF86VidModeGetAllModeLines(
Display *display\^,
int screen\^,
int *modecount_return\^,
XF86VidModeModeInfo ***modesinfo\^);
Bool XF86VidModeAddModeLine(
Display *display\^,
int screen\^,
XF86VidModeModeInfo *modeline\,
XF86VidModeModeInfo *aftermode\^);
Bool XF86VidModeDeleteModeLine(
Display *display\^,
int screen\^,
XF86VidModeModeInfo *modeline\^);
Bool XF86VidModeModModeLine(
Display *display\^,
int screen\^,
XF86VidModeModeLine *modeline\^);
Status XF86VidModeValidateModeLine(
Display *display\^,
int screen\^,
XF86VidModeModeLine *modeline\^);
Bool XF86VidModeSwitchMode(
Display *display\^,
int screen\^,
int zoom\^);
Bool XF86VidModeSwitchToMode(
Display *display\^,
int screen\^,
XF86VidModeModeInfo *modeline\^);
Bool XF86VidModeLockModeSwitch(
Display *display\^,
int screen\^,
int lock\^);
Bool XF86VidModeGetMonitor(
Display *display\^,
int screen\^,
XF86VidModeMonitor *monitor\^);
Bool XF86VidModeGetViewPort(
Display *display\^,
int screen\^,
int *x_return\^,
int *y_return\^);
Bool XF86VidModeSetViewPort(
Display *display\^,
int screen\^,
int x\^,
int y\^);
XF86VidModeGetDotClocks(
Display *display\^,
int screen\^,
int *flags return\^,
int *number of clocks return\^,
int *max dot clock return\^,
int **clocks return\^);
XF86VidModeGetGamma(
Display *display\^,
int screen\^,
XF86VidModeGamma *Gamma\^);
XF86VidModeSetGamma(
Display *display\^,
int screen\^,
XF86VidModeGamma *Gamma\^);
XF86VidModeGetGammaRamp(
Display *display\^,
int screen\^,
int size\^,
unsigned short *red array\^,
unsigned short *green array\^,
unsigned short *blue array\^);
XF86VidModeSetGammaRamp(
Display *display\^,
int screen\^,
int size\^,
unsigned short *red array\^,
unsigned short *green array\^,
unsigned short *blue array\^);
XF86VidModeGetGammaRampSize(
Display *display\^,
int screen\^,
int *size\^);
ARGUMENTS
display
Specifies the connection to the X server.
screen
Specifies which screen number the setting apply to.
event_base_return
Returns the base event number for the extension.
error_base_return
Returns the base error number for the extension.
major_version_return
Returns the major version number of the extension.
minor_version_return
Returns the minor version number of the extension.
dotclock_return
Returns the clock for the mode line.
modecount_return
Returns the number of video modes available in the server.
zoom
If greater than zero, indicates that the server should switch to
the next mode, otherwise switch to the previous mode.
lock
Indicates that mode switching should be locked, if non-zero.
modeline
Specifies or returns the timing values for a video mode.
aftermode
Specifies the timing values for the video mode after which the
new mode will added.
modesinfo
Returns the timing values and dotclocks for all of the available
video modes.
monitor
Returns information about the monitor.
x
Specifies the desired X location for the viewport.
x_return
Returns the current X location of the viewport.
y
Specifies the desired Y location for the viewport.
y_return
Returns the current Y location of the viewport.
STRUCTURES
Video Mode Settings:
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;
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;
Monitor information:
typedef struct {
char* vendor; / Name of manufacturer */
char* model; / Model name */
float EMPTY; / unused, for backward compatibility */
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;
typedef struct {
float hi; / Top of range */
float lo; / Bottom of range */
} XF86VidModeSyncRange;
typedef struct {
int type; / of event */
unsigned long serial; / # of last request processed by server */
Bool send_event; / true if this came from a SendEvent req */
Display *display; / Display the event was read from */
Window root; / root window of event screen */
int state; / What happened */
int kind; / What happened */
Bool forced; / extents of new region */
Time time; / event timestamp */
} XF86VidModeNotifyEvent;
typedef struct {
float red; / Red Gamma value */
float green; / Green Gamma value */
float blue; / Blue Gamma value */
} XF86VidModeGamma;
DESCRIPTION
These functions provide an interface to the server extension
XFree86-VidModeExtension
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
MODELINE FUNCTIONS
The function is used to query the settings for the currently selected video mode. The calling program should pass a pointer to a structure that it has already allocated. The function fills in the fields of the structure.If there are any server private values (currently only applicable to
the S3 server) the function will allocate storage for them.
Therefore, if the
field is non-zero, the calling program should call
to free the storage.
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
structures. The memory occupied by the array is dynamically allocated
by the
function and should be freed by the caller.
The first element of the array corresponds to the current video mode.
The
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).
To add a mode to the list of available modes, the
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
parameter.
To be considered a match, all of the fields of the given
structure must match, except the
and
fields.
If the
parameter is zero, the mode will be added
after the current mode.
Modes can be deleted with the
function. The specified mode must match an existing mode.
To be considered a match, all of the fields of the given
structure must match, except the
and
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.
The validity of a mode can be checked with the
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
otherwise it returns a value indicating the reason why the mode is
invalid (as defined in xf86.h)
MODE SWITCH FUNCTIONS
When the function is called, the server will change the video mode to next (or previous) video mode. The function can be used to switch directly to the specified mode. Matching is as specified in the description of the function above. The function can be used to allow or disallow mode switching whether the request to switch modes comes from a call to the or functions or from one of the mode switch key sequences.Note:
Because of the asynchronous nature of the X protocol, a call to
is needed if the application wants to see the mode change immediately.
To be informed of the execution status of the request, a
custom error handler should be installed using
before calling the mode switching function.
MONITOR FUNCTIONS
Information known to the server about the monitor is returned by the function. The and fields each point to an array of structures. The arrays contain and elements, respectively. The and values will be equal if a discreate value was given in the file.The
and
fields point to dynamically allocated storage that should be freed
by the caller.
VIEWPORT FUNCTIONS
The and functions can be used to, respectively, query and change the location of the upper left corner of the viewport into the virtual screen.OTHER FUNCTIONS
The function can be used to determine the version of the extension built into the server.The function
returns the lowest numbered error and event values
assigned to the extension.
BUGS
The
XF86VidModeSetClientVersion,
XF86VidModeGetDotClocks,
XF86VidModeGetGamma,
XF86VidModeSetGamma,
XF86VidModeSetGammaRamp,
XF86VidModeGetGammaRamp,
XF86VidModeGetGammaRampSize,
and
XF86VidModeGetPermissions
functions need to be documented. In the meantime, check the source
code for information about how to use them.
SEE ALSO
Xorg(1), xorg.conf(5), XFlush(3), XSetErrorHandler(3), xvidtune(1)
AUTHORS
Kaleb Keithley, Jon Tombs, David Dawes, and Joe Moss
ČLÁNKY DO MAILU