SetPreviewImageAttributes

Description

Sets image attributes such as picture size and zoom value for previewing a picture.

Applies to

Camera objects

Syntax

objectname.SetPreviewImageAttributes ( attrValue )

Argument	Description
objectname	The name of the camera object for which you want to set preview attributes
attrValue	A CameraImageAttributes structure that contains the attributes to be set for the device

Returns

Integer. Returns 1 for success, and one of the following negative values if an error occurs:

-1 Unspecified error
-2 Supporting DLL not loaded
-3 Other initialization error
-5 Inconsistency in this object instance
-6 Call to the driver or device failed
-7 Unsupported option
-8 Value for option is out of range

Usage

You can set different attributes for previewing and capturing images. Typical preview values are 160 and 120 pixels for width and height and 2 for zoom. Image sizes available depend on the device, but usually fewer sizes are available for preview.

Examples

Example 1

This example gets the attributes that are available for a device in an array of CameraImageAttributes structures and displays them to the user so that the user can select the set of attributes to be used for preview and capture:

CameraImageAttributes AllowedConfigs[]
g_myCam.GetAllowedImageAttributes(AllowedConfigs)

// Display choices to user and let user select
// a preview and capture configuration
...
// User chose 1 for preview, 3 for capture
g_myCam.SetPreviewImageAttributes(AllowedConfigs[1])
g_myCam.SetCaptureImageAttributes(AllowedConfigs[3])