MdispZoom

See also

User Guide:

C/C++ MILweb function reference Fundamentals for creating your MILweb client application JavaScript MILweb function reference Panning and zooming

Reference:

MdispControl MdispPan

Availability

Available in MIL-Lite

Available in MIL

Available on Windows

Available on Linux

Not supported on:

Not supported on Matrox Indio (Update 53 or Update 68) (w)

Not supported on Matrox Concord PoE with ToE (Update 82) (z)

Fully supported on:

Fully supported on Host system (a)

Fully supported on Matrox GigE Vision driver (MIL 10, Update 25, Update 54, or Update 85)* (c)

Fully supported on Matrox Morphis (g)

Fully supported on Matrox Morphis QxT (h)

Fully supported on Matrox Orion HD (i)

Fully supported on Matrox Radient eCL (j)

Fully supported on Matrox Radient eV-CXP (MIL 10 or Update 29)* (k)

Fully supported on Matrox Solios eA/XA (l)

Fully supported on Matrox Solios ecl/xcl/ev-cl (m)

Fully supported on Matrox USB3 Vision driver (Update 19) (o)

Fully supported on Matrox RadientPro-CL (Update 7) (p)

Fully supported on Matrox Radient eV-CL (Update 27 or 74) (r)

Fully supported on Matrox Iris GTR (Update 28 or Update 68) (t)

Fully supported on Matrox Clarity UHD (Update 36 or 76) (u)

Fully supported on Matrox GenTL driver (Update 34) (v)

Fully supported on Matrox Rapixo CXP (Update 75 or Update 84) (y)

Fully supported on Matrox Rapixo CL Pro (Update 96) (aa)

* Refer to the MIL system-specific information
in the MIL Reference for the minimum update required.

For any information regarding a MIL system added during a MIL Update, see the MIL system’s release note

Available on Non-Matrox computer

Available on Matrox 4Sight-X

Available on Matrox 4Sight GP/GPm

Available on Matrox Supersight

Function map

Examples

Function Map

- DisplayId

- XFactor

Table:

For specifying the zoom factor in the X-direction

- YFactor

Table:

For specifying the zoom factor in the Y-direction

Compilation information

Synopsis

Zoom a display.

Syntax

void MdispZoom(

MIL_ID DisplayId,	//in
MIL_DOUBLE XFactor,	//in
MIL_DOUBLE YFactor	//in

)

Description

This function associates a zoom factor in X and/or in Y with the specified display. When an image buffer is selected for display, it will be zoomed according to these factors. The image buffer is displayed starting from its top-left corner, unless panning is also associated with the display (using MdispPan()).

Instead of explicitly specifying a zoom factor, you can automatically scale the selected image buffer to fit the display, using MdispControl() with M_SCALE_DISPLAY. M_SCALE_DISPLAY ensures that the image aspect ratio is maintained. If you use M_SCALE_DISPLAY, the explicitly specified zoom factors (MdispZoom()) and pan settings (MdispPan()) will be overwritten.

For windowed and exclusive displays, you can also zoom the display interactively using the + and - keys, if the keys associated with the display have not been disabled using MdispControl() with M_KEYBOARD_USE.

Note that the window must have the focus for the keys to work. To give focus to an exclusive display, you must permit the mouse cursor to move over the display, using MdispControl() with M_RESTRICT_CURSOR.

Once you have permitted the mouse cursor to move over the display, you can use the mouse wheel to zoom in or out of the image interactively; to do so, scroll the wheel up or down, respectively.

Note that this function reference has not been updated for a MIL system added during a MIL update. Refer to the MIL system's release note to see which MIL system’s documentation you should use in its place and any possible differences.

Parameters

This function is not supported on the selected boards.

This function reference has not been updated for the selected MIL system. To show the content of this page, choose a second MIL system; refer to the MIL system's release note to see which MIL system’s documentation to choose and any possible differences.

Parameters

DisplayId

Specifies the identifier of the display.

XFactor INQ

Specifies the zoom factor for the X-direction of the display. This parameter must be set to one of the following values:

For specifying the zoom factor in the X-direction
Value	Description
Value > 0.0	Specifies the zoom factor for the X-direction of the display. A value greater than 1.0 will zoom in, while a factor less than 1.0 will zoom out. (summarize) Specifies the zoom factor for the X-direction of the display. (more details...)

YFactor INQ

Specifies the zoom factor for the Y-direction of the display. This parameter must be set to one of the following values:

For specifying the zoom factor in the Y-direction
Value	Description
Value > 0.0	Specifies the zoom factor for the Y-direction of the display. A value greater than 1.0 will zoom in, while a factor less than 1.0 will zoom out. (summarize) Specifies the zoom factor for the Y-direction of the display. (more details...)

Compilation information

Header	Include mil.h.
Library	Use mil.lib.
DLL	Requires mil.dll; mildisplay.dll.