How to set alpha channel names in a format plugin?

I am writing a format plugin with 6 color planes for CMYK mode. I want to set the apha channel names for planes 5 and 6 to "White" and "Clear" instead of "Alpha 1" and "Alpha 2" when I read the color data from my file. How do I set the alpha channel names?
Thanks!

I am still trying to find a solution to this. The propChannelName is read only and the documentInfo structure is NULL when reading. Any suggestions?

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Alpha channel data with layered format plugin

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Ptr pixelData = sPSBuffer->New( &bufferSize, bufferSize );
if (pixelData == NULL)
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PIChannelPort port = alphaChannel->port;
PSScaling scale;
scale.sourceRect = scale.destinationRect = alphaChannel->bounds;
VRect destRect = scale.sourceRect;
// Set up the descriptor for reading pixel data
VRect wroteRect = {0};
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dest.rowBits = imSize.h*alphaChannel->depth;
dest.colBits = alphaChannel->depth;
dest.depth = alphaChannel->depth;
dest.data = pixelData;
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The alpha channel gives me the proper name, but I just can't get the data associated with it. Thanks.

I am still trying to find a solution to this. The propChannelName is read only and the documentInfo structure is NULL when reading. Any suggestions?

Setting the layer name from a format plugin with CS2 and before

Hello,
I wrote a new format plugin and the name of the layer shown in PS , when I read a file, does not seem to be consistent on all computers for versions CS2 and before : some times I get "Background" and some times I get "Layer 0" .
When the layer is named is "Background", it is locked. If I double click on the layer, I get a panel to rename it and the name suggested is "Layer 0" (and not "Background").
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I do not care much about the actual layer name as long as that name is consistent for all installations. Does anybody know what is going on?
Thank you!
Gilbert

If it has transparency, it has to be a layer ("Layer0").
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Hello,
I'm a production artist and I work with PSD files that were created in Adobe Scene7 Image Authoring Tool. These PSDs contain a background layer along with 1-20 alpha channels. My script has to make a new blank layer for every alpha channel in the document. Then it fills the new layer with light gray. So far, my code accomplishes this. However, I'd like to apply the name of the alpha channel to the layer, but I need the name to be truncated. Every alpha channel starts with one or more characters followed by a backslash and then finishes with one or more characters. Here's an example:
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Can anyone tell me why I'm getting this error?
Below is my code with lots of comments to walk you through the process. I wrote where the error occurs in red type.
I'm new to JavaScript so I'm not sure my while loop is accurate.
#target photoshop
// The #target photoshop makes the script run in PS.
// declare variable to contain the active document
var myDoc=app.activeDocument;
// declare variable to contain the number of alpha channels, excluding the RGB channels
var alphaChan = myDoc.channels.length - 3;
alert(alphaChan + " alpha channels exist");
// create loop to make new layers based on number of alpha channels, fill layer with gray and apply alpha channel name to new layer
for (a=0 ; a<alphaChan ; a+=1){
// make new blank layer
myDoc.artLayers.add();
// fill blank layer with gray
var color = new SolidColor();
color.rgb.red = 161;
color.rgb.green = 161;
color.rgb.blue= 161;
myDoc.selection.fill(color);
//variable stores alpha channel name
var alphaName = myDoc.channels[3+a];
// variable stores lenght of alpha channel name
var lz = alphaName.length;
// declare index variable to initialize position of 1st character of alpha channel name
var x= 0 ;
// truncate alpha channel name by removing all characters preceding the "\" symbol
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return alphaName;
// remove the backslash from alpha channel name
alphaName = alphaName.subString((x+1),z);
// apply truncated alpha channel name to corresponding layer
myDoc.artLayers[a].name = alphaName;

while (alphaName.subString(x) != "\"){
should be
while (alphaName.subString(x) != "\\"){

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regards...
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Many thanks in advance

Nevermind, I solved it by not using _root. in front of the combobox name.
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How to retrieve alpha channel data in format plugin

I want to ask how to get the alpha channel 's data that describle the document's transparent info, in a format plugin.
for example , when open a PNG file in Photoshop, the photoshop set FormatRecord:: planes to 3 (not 4),
in this case i can only request the RGB data.
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How copy an alpha channel mask to an adjustment layer?

I can copy an alpha channel mask to an image layer by Ctrl+Clicking the alpha channel then clicking the Add Layer Mask icon in Photoshop CC but this does not work for an adjustment layer. How can I copy the mask from an alpha channel to the layer mask for an adjustment layer? Thanks.

I am using Photoshop CC as I stated in my question. All updates have been installed.
I am running on Win 7 Pro 64 bit with all updates installed.
I am editing a photograph.
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If I Ctrl+Click the alpha channel then click the Add Layer Mask button to add a layer mask to an image layer the alpha channel mask is added to the image layer.
If I delete the layer mask from an adjustment layer and follow the same steps a solid white mas is added to the adjustment layer.
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Attachments:
Channel names.gif ‏4 KB

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How to set alpha channel names in a format plugin?

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