OK, this is far from perfect, however, it is the best that I can currently do (I still consider myself a beginner).
You should temporarily move the files that don't have a matching _a.bmp alpha file to a temporary folder so that they are not processed.
Hope this helps.
WARNINGS & NOTES FOR USE:
- Use at your own risk!!!
- There must be multiple pairs of files, not an odd number of input files, there is no error checking
- Work on copies of the original files until you are happy with the results
- The original .bmp file will be overwritten, I did I mention to use at your own risk and to work on copies!
- The code could be adjusted to save the adjusted file with a new name rather than overwrite the original (there are 10,000+ files to consider)
- The alpha _a.bmp files will be closed without saving changes
- Only the top-level folder will be processed, sub-directories must be processed separately
- A selection will be loaded from the RGB composite channel of the alpha data
- An action will then be run to complete the processing using the selection
- Change the action name from Molten Lead to your name
- Change the action set name from Default Actions to your name
// Use at your own risk!!!
// There must be multiple pairs of files, not an odd number of input files, there is no error checking
// Work on copies of the original files until you are happy with the results
// The original .bmp file will be overwritten
// The alpha _a.bmp files will be closed without saving changes
// Only the top-level folder will be processed, sub-directories must be processed separately
// A selection will be loaded from the RGB composite channel of the alpha data
// An action will then be run to complete the processing using the selection
// Change the action name from Molten Lead to your name
// Change the action set name from Default Actions to your name
#target photoshop
// Capture and suppress dialogs during batch
var savedDisplayDialogs = app.displayDialogs;
app.displayDialogs = DialogModes.NO;
main();
function main() {
inputFolder = Folder.selectDialog("Please select the input folder");
if (inputFolder == null) return;
// Limit the file input
var fileList = inputFolder.getFiles(/\.(bmp)$/i);
// Force alpha-numeric list sort
fileList.sort();
while (fileList.length) {
// Digit 2 for two files
for (var a = 0; a < 2; a++) {
try {
app.open(fileList.pop());
} catch (e) { }
}
//var fileCount = app.documents.length;
//alert("There are " + fileCount + " files to process");
doStuff();
}
function doStuff() {
try {
// Select the alpha document
app.activeDocument = app.documents[0];
// Select all
app.activeDocument.selection.selectAll();
// Copy selection
app.activeDocument.selection.copy();
// Close active document without saving
app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
// Paste from clipboard
app.activeDocument.paste();
// Load RGB channel as selection
var idsetd = charIDToTypeID("setd");
var desc146 = new ActionDescriptor();
var idnull = charIDToTypeID("null");
var ref59 = new ActionReference();
var idChnl = charIDToTypeID("Chnl");
var idfsel = charIDToTypeID("fsel");
ref59.putProperty(idChnl, idfsel);
desc146.putReference(idnull, ref59);
var idT = charIDToTypeID("T ");
var ref60 = new ActionReference();
var idChnl = charIDToTypeID("Chnl");
var idChnl = charIDToTypeID("Chnl");
var idRGB = charIDToTypeID("RGB ");
ref60.putEnumerated(idChnl, idChnl, idRGB);
desc146.putReference(idT, ref60);
executeAction(idsetd, desc146, DialogModes.NO);
// Remove active layer
app.activeDocument.activeLayer.remove();
// Now do something with the selection active to limit the effects...
/*
// Brightness +30, Contrast +90, Use Legacy = False
var idBrgC = charIDToTypeID( "BrgC" );
var desc71 = new ActionDescriptor();
var idBrgh = charIDToTypeID( "Brgh" );
desc71.putInteger( idBrgh, 30 );
var idCntr = charIDToTypeID( "Cntr" );
desc71.putInteger( idCntr, 90 );
var iduseLegacy = stringIDToTypeID( "useLegacy" );
desc71.putBoolean( iduseLegacy, false );
executeAction( idBrgC, desc71, DialogModes.NO );
*/
///////////// Your action here /////////////
// Action to run
var actionName = "Molten Lead";
// Action set to run
var actionSet = "Default Actions";
app.doAction(actionName, actionSet);
///////////// Your action here /////////////
app.activeDocument.flatten();
app.activeDocument.close(SaveOptions.SAVECHANGES);
} catch (e) { }
}
}
// Restore original dialog settings
app.displayDialogs = savedDisplayDialogs;
23rd JUNE 2020
Initial code posted
24th JUNE 2020
I have added code for the Brightness/Contrast step to remove the dependency on the action, however, I have commented out the code and left the action in there for now, just in case the action is doing more than this single step...
https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html
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