Resize MacOS icons and script their creation

Creates a script that will fomat the MacOS icons at 80% of the total
size in line with Apple's guidelines.

Script requires Inkscape 1.0 and png2icns (available on Linux boxen)

Fixes https://gitlab.com/kicad/code/kicad/issues/7977

bitmaps_png/mk_mac_icons.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+#
+# make macos icons using Inkscape
+
+mkdir macos_tmp
+# convert .svg files into .png files
+
+SIZES="16x16
+       32x32
+       128x128
+       256x256
+       512x512
+       1024x1024"
+
+ICONS="bitmap2component
+       eeschema
+       gerbview
+       kicad
+       pagelayout_editor
+       pcbcalculator
+       pcbnew"
+
+
+for pgm in $ICONS
+do
+    output=""
+
+    for size in $SIZES
+    do
+        sz=${size%x*}
+
+        echo -e '\E[0;32m'"\nMaking the applications icons with size $size."
+        
+        # MacOS wants icons with 10% clearance on each side
+        let "sub_sz = $sz * 8 / 10"
+
+        # Use specialized icons for smaller sizes to keep pixel alignment
+        if [ $sz -le 32 ]
+        then
+            inkscape sources/light/icon_${pgm}_${sz}.svg -o macos_tmp/${pgm}_small_${sz}px.png -w ${sub_sz} -h ${sub_sz} --export-area-snap
+        else
+            inkscape sources/light/icon_${pgm}.svg -o macos_tmp/${pgm}_small_${sz}px.png -w ${sub_sz} -h ${sub_sz} --export-area-snap
+        fi
+
+        convert macos_tmp/${pgm}_small_${sz}px.png -size $size xc:transparent +swap -gravity center -composite macos_tmp/${pgm}_${sz}px.png
+
+        output+="macos_tmp/${pgm}_${sz}px.png "
+    done
+
+    if [ ${pgm} == "pcbcalculator" ]
+    then
+        # mismatch in the pcbcalculator icon names
+        png2icns ../pcb_calculator/pcb_calculator.icns ${output}
+    elif [ ${pgm} == "bitmap2component" ]
+    then
+        #bitmap2component does not have associated documents
+        png2icns ../${pgm}/${pgm}.icns ${output}
+    else
+        png2icns ../${pgm}/${pgm}.icns ${output}
+        cp ../${pgm}/${pgm}.icns ../${pgm}/${pgm}_doc.icns
+    fi
+done
+
+rm -rf macos_tmp

pagelayout_editor/CMakeLists.txt

@@ -62,15 +62,15 @@ endif()
 
 if( APPLE )
     # setup bundle
-    set( PL_EDITOR_RESOURCES pl_editor.icns pl_editor_doc.icns )
-    set_source_files_properties( "${CMAKE_CURRENT_SOURCE_DIR}/pl_editor.icns" PROPERTIES
+    set( PL_EDITOR_RESOURCES pagelayout_editor.icns pagelayout_editor_doc.icns )
+    set_source_files_properties( "${CMAKE_CURRENT_SOURCE_DIR}/pagelayout_editor.icns" PROPERTIES
         MACOSX_PACKAGE_LOCATION Resources
         )
-    set_source_files_properties( "${CMAKE_CURRENT_SOURCE_DIR}/pl_editor_doc.icns" PROPERTIES
+    set_source_files_properties( "${CMAKE_CURRENT_SOURCE_DIR}/pagelayout_editor_doc.icns" PROPERTIES
         MACOSX_PACKAGE_LOCATION Resources
         )
-    set( MACOSX_BUNDLE_ICON_FILE pl_editor.icns )
-    set( MACOSX_BUNDLE_GUI_IDENTIFIER org.kicad-pcb.kicad )
+    set( MACOSX_BUNDLE_ICON_FILE pagelayout_editor.icns )
+    set( MACOSX_BUNDLE_GUI_IDENTIFIER org.kicad.kicad )
     set( MACOSX_BUNDLE_NAME pl_editor )
 endif()