Windows: Add ARM64 distribution support (see issue #2773)

To generate Windows ARM64 builds set the CEF_ENABLE_ARM64=1 environment
variable and pass the "--arm64-build --build-target=cefsimple" command-line
arguments to automate-git.py. We can't build cefclient.exe for ARM64 due to
missing OpenGL library support so build cefsimple.exe instead.

CMakeLists.txt.in

@@ -115,6 +115,17 @@
 #     > "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvars64.bat"
 #     > cmake -G "Ninja" -DCMAKE_BUILD_TYPE=Debug ..
 #     > ninja cefclient cefsimple
+#
+# To perform a Windows build using an ARM64 CEF binary distribution:
+#   Using the Visual Studio 2019 IDE:
+#     > cmake -G "Visual Studio 16" -A arm64 ..
+#     Open build\cef.sln in Visual Studio and select Build > Build Solution.
+#
+#   Using Ninja with Visual Studio 2019 command-line tools:
+#     (this path may be different depending on your Visual Studio installation)
+#     > "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvarsamd64_arm64.bat"
+#     > cmake -G "Ninja" -DCMAKE_BUILD_TYPE=Debug ..
+#     > ninja cefsimple
 
 #
 # Global setup.

cmake/cef_variables.cmake.in

@@ -26,7 +26,9 @@ endif()
 
 # Determine the project architecture.
 if(NOT DEFINED PROJECT_ARCH)
-  if(CMAKE_SIZEOF_VOID_P MATCHES 8)
+  if(OS_WINDOWS AND ${CMAKE_GENERATOR_PLATFORM} STREQUAL "arm64")
+    set(PROJECT_ARCH "arm64")
+  elseif(CMAKE_SIZEOF_VOID_P MATCHES 8)
     set(PROJECT_ARCH "x86_64")
   else()
     set(PROJECT_ARCH "x86")
@@ -462,7 +464,6 @@ if(OS_WINDOWS)
   # List of CEF binary files.
   set(CEF_BINARY_FILES
     chrome_elf.dll
-    d3dcompiler_47.dll
     libcef.dll
     libEGL.dll
     libGLESv2.dll
@@ -471,6 +472,12 @@ if(OS_WINDOWS)
     swiftshader
     )
 
+  if(NOT PROJECT_ARCH STREQUAL "arm64")
+    list(APPEND CEF_BINARY_FILES
+      d3dcompiler_47.dll
+      )
+  endif()
+
   # List of CEF resource files.
   set(CEF_RESOURCE_FILES
     cef.pak
@@ -490,12 +497,15 @@ if(OS_WINDOWS)
 
     # Libraries required by cef_sandbox.lib.
     set(CEF_SANDBOX_STANDARD_LIBS
+      Advapi32.lib
       dbghelp.lib
       Delayimp.lib
+      OleAut32.lib
       PowrProf.lib
       Propsys.lib
       psapi.lib
       SetupAPI.lib
+      Shell32.lib
       version.lib
       wbemuuid.lib
       winmm.lib

tools/automate/automate-git.py

@@ -985,7 +985,7 @@ else:
   sys.exit()
 
 if options.clientdistrib or options.clientdistribonly:
-  if platform == 'linux':
+  if platform == 'linux' or (platform == 'windows' and options.arm64build):
     client_app = 'cefsimple'
   else:
     client_app = 'cefclient'

tools/cefbuilds/cef_json_builder.py

@@ -100,7 +100,7 @@ class cef_json_builder:
   def get_platforms():
     """ Returns the list of supported platforms. """
     return ('linux32', 'linux64', 'linuxarm', 'linuxarm64', 'macosarm64', 'macosx64',
-            'windows32', 'windows64')
+            'windows32', 'windows64', 'windowsarm64')
 
   @staticmethod
   def get_distrib_types():

tools/make_distrib.py

@@ -860,7 +860,9 @@ if platform == 'windows':
   # yapf: enable
 
   if mode == 'client':
-    binaries.append({'path': 'cefclient.exe'})
+    binaries.append({
+        'path': 'cefsimple.exe' if platform_arch == 'arm64' else 'cefclient.exe'
+    })
   else:
     binaries.append({'path': libcef_dll_lib, 'out_path': 'libcef.lib'})