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Photoshop script odd number

I need to open an image and check that the width and height are even numbers. If they are not -1px.

How do I check to see if a number is odd?

291px would = 290px

333px would = 332px

121px would = 120px

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3

Answers


  1. 0

    You could divide the original length by two, round it down with Math.floor() and multiply the result with two to get the desired result.

    var wa = app.documents[0].width;
var ha = app.documents[0].height;
var wb = 2*Math.floor(wa/2);
var hb = 2*Math.floor(ha/2);
app.activeDocument.resizeCanvas(wb, hb);
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  2. 0

    Untested, but you should be able to do this:

    if(x&1) {x--}

    That tests if the least significant bit is one (i.e. x is odd) and decrements it if so.

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  3. 0

    You can check using modulus!

    // call the source document
var srcDoc = app.activeDocument;

// get original width and height
var docWidth = srcDoc.width.value;
var docHeight = srcDoc.height.value;

if (docWidth%2 == 0) alert("Image is an even number of pixels wide);
else alert("Image is an odd number of pixels wide);
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