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error 404 maskData | revDocs | RunRev
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Product Edition
Version
maskData
Basics
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Type
Property
Syntax
set the maskData of image to binaryData
Introduced
1.1
Environment
Desktop, Web and Server
Platform Support
MacOS,Mac OS X,Windows,Linux
Security
None required
Summary
Specifies which pixels of an image are displayed.
Examples

put the maskData of image "Download" into dataToAnalyze

Additional Comments
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Use the maskData property to change the appearance of an image without changing its image data, or to examine the mask of the image.

Value:

The maskData of an image consists of a sequence of binary values.

Comments:

Each pixel is represented by 8 bits (1 byte) of mask data, with pixels numbered from the top left corner of the image, left to right, then top to bottom.

Since each pixel is represented by 8 bits (1 byte or 1 character), you can obtain the numeric value for a given pixel using the charToNum function. For example, the numeric value of the maskData for the tenth pixel is given by the expression charToNum(char 10 of the mask of image).

A value of zero means the pixel is fully transparent; any other value means the pixel is fully opaque. Unlike the alphaData property, the maskData stores only complete transparency or complete opacity, and does not support partial transparency.

User Comments
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