Resize layer to fit canvas size

[Byteripper]

Could you help me with a script that resize layer and constrain proportions to fit canvas size, according to any size of the canvas?

[myranalis]

This is my standard function to scale and center one layer to fit another - or in your case pTargetLayer is the document itself.

Code: Select allfunction ScaleToFit(pLyr, pTargetLayer) {
   try {
         var cw;
         var ch;
         var targetx;
         var targety;
         
         if (pTargetLayer.typename == "ArtLayer") {         
            cw =pTargetLayer.bounds[2].as('px') - pTargetLayer.bounds[0].as('px');
            ch = pTargetLayer.bounds[3].as('px') - pTargetLayer.bounds[1].as('px');
            targetx = pTargetLayer.bounds[0].as('px') + cw/2;
            targety = pTargetLayer.bounds[1].as('px') + ch/2;
         } else if (pTargetLayer.typename == "Document") {
            cw =pTargetLayer.width.as('px');
            ch = pTargetLayer.height.as('px');
            targetx = cw/2;
            targety = ch/2;
         } else {
            //invalid type
            return;
         }
         var lw = pLyr.bounds[2].as('px') - pLyr.bounds[0].as('px');
         var lh = pLyr.bounds[3].as('px') - pLyr.bounds[1].as('px');
         
         var rWidth = cw/lw;
         var rHeight = ch/lh;
         
         if (rWidth != 1 && rHeight != 1)  {               
            if (rWidth > rHeight) {
               //resize up by rwidth as a percent
               pLyr.resize(rWidth * 100, rWidth * 100);
            } else {
               //resize up by rheight as a percent
               var t = rHeight * 100;
               pLyr.resize(rHeight * 100, rHeight * 100);
            }
         }
      
         lw = pLyr.bounds[2].as('px') - pLyr.bounds[0].as('px');
         lh = pLyr.bounds[3].as('px') - pLyr.bounds[1].as('px');
         var currx =  pLyr.bounds[0].as('px') + lw/2;         
         var curry =  pLyr.bounds[1].as('px') + lh/2;
         pLyr.translate(targetx - currx, targety - curry);

   } catch (e) {
      //ignore
   }
}

[Byteripper]

Maybe I'm doing it wrong... I have the layer trimed and when i run the script it doesn't do anything.

[myranalis]

Well first thing - the above was meant to be just a function you can adapt to your needs - not a complete script. It doesn't do anything if you just run it in Photoshop as is. You need to at least add the following as the very last line:

Code: Select allScaleToFit(app.activeDocument.activeLayer, app.activeDocument);


Then run it after you've selected your shoe layer.

Second, I doubt that function will work in your case because I rarely have to accommodate layer masks in the layers I am moving around. I am pretty sure that you'll have to apply the layer mask before that function will work.