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A
artmelkon
Participant
November 3, 2021
Answered

How to apply BitmapConversionOptions to Bitmap

  • November 3, 2021
  • 3 replies
  • 860 views

Hello there,

I was trying to convert a grayscale image to bitmap and can't move forward as couldn't find any documentation how to utilize BitmapConversionOption superclass.

This is what my script like.

#target photoshop

var doc = app.activeDocument;

doc.changeMode(ChangeMode.GRAYSCALE);

doc.changeMode(ChangeMode.BITMAP);

 

And from this point on I can't figure out to proceed with BtimapConversionOptions, to pass the parameters. Anyone can shed some light on this issue? It will be greatly appriciated

This topic has been closed for replies.
Correct answer Stephen Marsh

The bitmapConversionOptions are listed in the JavaScript Reference PDF for standard DOM coding. If the syntax is an issue, you could fast-track the process by recording AM code via the ScriptingListener plugin.

 

Edit - some searching came up with this DOM code:

 

var bitSaveOptions = new BitmapConversionOptions();
bitSaveOptions.method = BitmapConversionType.HALFTONESCREEN;
bitSaveOptions.angle = 45;
bitSaveOptions.frequency = 55;
bitSaveOptions.resolution = 300;
bitSaveOptions.shape = BitmapHalfToneType.ROUND;

app.activeDocument.changeMode(ChangeMode.BITMAP,bitSaveOptions);

 

 

3 replies

L
Lumigraphics
Legend
November 3, 2021

    Stephen Marsh
    Community Expert
    Stephen MarshCommunity ExpertCorrect answer
    Community Expert
    November 3, 2021

    The bitmapConversionOptions are listed in the JavaScript Reference PDF for standard DOM coding. If the syntax is an issue, you could fast-track the process by recording AM code via the ScriptingListener plugin.

     

    Edit - some searching came up with this DOM code:

     

    var bitSaveOptions = new BitmapConversionOptions();
bitSaveOptions.method = BitmapConversionType.HALFTONESCREEN;
bitSaveOptions.angle = 45;
bitSaveOptions.frequency = 55;
bitSaveOptions.resolution = 300;
bitSaveOptions.shape = BitmapHalfToneType.ROUND;

app.activeDocument.changeMode(ChangeMode.BITMAP,bitSaveOptions);

     

     

      A
      artmelkonAuthor
      Participant
      November 4, 2021

      Thanks a lot, it solved my issue. I did read the documentation, but wasn't quire sure how to implement it.

        Stephen Marsh
        Community Expert
        Stephen MarshCommunity Expert
        Community Expert
        November 4, 2021
        @artmelkon wrote:

        Thanks a lot, it solved my issue. I did read the documentation, but wasn't quire sure how to implement it.

         

        Yes, it can be hard to get the syntax right without an example, which is why I suggested taking the easy way out and using AM code recorded via the ScriptingListener plugin:

         

         

        var idconvertMode = stringIDToTypeID( "convertMode" );
    var desc180 = new ActionDescriptor();
    var idto = stringIDToTypeID( "to" );
        var desc181 = new ActionDescriptor();
        var idresolution = stringIDToTypeID( "resolution" );
        var iddensityUnit = stringIDToTypeID( "densityUnit" );
        desc181.putUnitDouble( idresolution, iddensityUnit, 300.000000 );
        var idmethod = stringIDToTypeID( "method" );
        var idmethod = stringIDToTypeID( "method" );
        var idhalftoneScreen = stringIDToTypeID( "halftoneScreen" );
        desc181.putEnumerated( idmethod, idmethod, idhalftoneScreen );
        var idfrequency = stringIDToTypeID( "frequency" );
        var iddensityUnit = stringIDToTypeID( "densityUnit" );
        desc181.putUnitDouble( idfrequency, iddensityUnit, 55.000000 );
        var idangle = stringIDToTypeID( "angle" );
        var idangleUnit = stringIDToTypeID( "angleUnit" );
        desc181.putUnitDouble( idangle, idangleUnit, 45.000000 );
        var idshape = stringIDToTypeID( "shape" );
        var idshape = stringIDToTypeID( "shape" );
        var idround = stringIDToTypeID( "round" );
        desc181.putEnumerated( idshape, idshape, idround );
    var idbitmapMode = stringIDToTypeID( "bitmapMode" );
    desc180.putObject( idto, idbitmapMode, desc181 );
executeAction( idconvertMode, desc180, DialogModes.NO );

         

         

        JJMack
        Community Expert
        JJMackCommunity Expert
        Community Expert
        November 3, 2021

        Have you looked at Adobe conditional mode change script.  Menu File>Automate>Conditional Mode Change?  I do not know how it works and  do not even see a .changeMode() in the script but it does seem to change the document mode. It may have  the code you want. 

        JJMack
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