@@ -6,6 +6,7 @@

  *

  * History:

  *      28/06/2019 Creation

+ *      27/01/2024 Support transparency

  *

  * Author: Dario Rodriguez dario@softhome.net

  * This program is distributed under the terms of the GNU GPL v2.1+

@@ -19,7 +20,9 @@ main(int argc, array(string) argv)

         string origfilename;

         string resprefix;

         int x,y,total;

-        Image.Image img,cropped;

+        mapping imagemapping;

+        Image.Image image,alpha,cropped,croppedalpha;

+        Image.Layer l;

         string outfilename;

         if(argc<4 || (argc>1 && argv[1]=="--help")) {

                 Stdio.werror("Syntax:  "+argv[0]+" <width_in_a4pages> <height_in_a4_pages> <origimage.png>\n");

@@ -32,16 +35,21 @@ main(int argc, array(string) argv)

         origfilename=argv[3];

         resprefix=(origfilename/".png")[0];

         write("* Loading "+origfilename+"...\n");

-        img=Image.load(origfilename);

-        px=img->xsize()/a4w;

-        py=img->ysize()/a4h;

+        imagemapping=Image._load(origfilename);

+        image=imagemapping["image"];

+        alpha=imagemapping["alpha"];

+        px=image->xsize()/a4w;

+        py=image->ysize()/a4h;

         for(total=0,y=0;y<a4h;y++) {

                 for(x=0;x<a4w;x++) {

                         total++;

-                        cropped=img->copy(x*px,y*py,(x+1)*px-1,(y+1)*py-1,255,255,255);

+                        cropped=image->copy(x*px,y*py,(x+1)*px-1,(y+1)*py-1,255,255,255);

+                        croppedalpha=alpha->copy(x*px,y*py,(x+1)*px-1,(y+1)*py-1,255,255,255);

+                        l=Image.Layer(cropped,croppedalpha,"normal");

+                        l->set_offset(0,0);

                         outfilename=sprintf("%s_%05d.png",resprefix,total);

                         write("* Writing "+outfilename+"...\n");

-                        Stdio.write_file(outfilename,Image.PNG.encode(cropped));

+                        Stdio.write_file(outfilename,Image.PNG.encode(l->image(),(["alpha":l->alpha()])));

                 }

         }

         write(""+total+" slices written. Process finished.\n");