imaqZoomWindow
From NI Vision for LabWindows/CVI Function
imaqZoomWindow
Usage
int imaqZoomWindow(int windowNumber, int xZoom, int yZoom, Point center);
Purpose
Sets the current zoom factors for a given image window. The zoom factor indicates an increase or decrease in the magnification of an image. A positive number indicates a magnification by the amount specified. For example, a zoom factor of 3 indicates that the image is displayed at three times its actual size (3:1). A negative number indicates that the image is decreased in magnification by the specified amount. For example, a zoom factor of –5 indicates that the image is displayed at one-fifth its actual size (1:5).
 |
Note This function is obsolete. The replacement function is imaqZoomWindow2(). |
Parameters
|
Name
|
Type
|
Description
|
|---|---|---|
| windowNumber | int | The window number of the image window. |
| xZoom | int | The zoom factor for the x direction. Set xZoom to zero to maintain the current zoom factor for the x direction. |
| yZoom | int | The zoom factor for the y direction. Set yZoom to zero to maintain the current zoom factor for the y direction. |
| center | Point | The center point around which to zoom. Set this parameter to IMAQ_NO_POINT to maintain the current center point. |
Return Value
| Type |
Description |
|---|---|
| int | On success, this function returns a non-zero value. On failure, this function returns 0. To get extended error information, call imaqGetLastError(). |