CMake: enable Direct2D graphics context by default

Disable it when the d2d1.h header is not found.
When using MSVC, match the behaviour of setup.h.

build/cmake/init.cmake

@@ -142,10 +142,6 @@ if(DEFINED wxUSE_OLE AND wxUSE_OLE)
     set(wxUSE_OLE_AUTOMATION ON)
 endif()
 
-if(DEFINED wxUSE_GRAPHICS_DIRECT2D AND NOT wxUSE_GRAPHICS_CONTEXT)
-    set(wxUSE_GRAPHICS_DIRECT2D OFF)
-endif()
-
 if(wxUSE_OPENGL)
     set(wxUSE_GLCANVAS ON)
 endif()
@@ -174,6 +170,21 @@ if(wxUSE_GUI)
         set(wxUSE_ENH_METAFILE ON)
     endif()
 
+    # Direct2D check
+    if(WIN32 AND wxUSE_GRAPHICS_DIRECT2D)
+        check_include_file(d2d1.h HAVE_D2D1_H)
+        if (NOT HAVE_D2D1_H)
+            wx_option_force_value(wxUSE_GRAPHICS_DIRECT2D OFF)
+        endif()
+    endif()
+     if(MSVC) # match setup.h
+        if(MSVC_VERSION LESS 1600)
+            wx_option_force_value(wxUSE_GRAPHICS_DIRECT2D OFF)
+        else()
+            wx_option_force_value(wxUSE_GRAPHICS_DIRECT2D ${wxUSE_GRAPHICS_CONTEXT})
+        endif()
+     endif()
+
     # WXQT checks
     if(WXQT)
         wx_option_force_value(wxUSE_WEBVIEW OFF)

build/cmake/options.cmake

@@ -208,8 +208,8 @@ if(APPLE)
     set(wxUSE_GRAPHICS_CONTEXT ON)
 else()
     wx_option(wxUSE_GRAPHICS_CONTEXT "use graphics context 2D drawing API")
-    if (WIN32 AND (NOT MSVC OR MSVC_VERSION LESS 1600))
-        wx_option(wxUSE_GRAPHICS_DIRECT2D "enable Direct2D graphics context" OFF)
+    if(WIN32)
+        wx_option(wxUSE_GRAPHICS_DIRECT2D "enable Direct2D graphics context")
     endif()
 endif()