aegisub: ifdef wxBitmap constructor to scale on MacOS only

Quick fix to unblock the build; need better HiDPI handling across the board

meson.build

@@ -131,6 +131,7 @@ else
                                                        '-DwxBUILD_SHARED=@0@'.format(build_shared),
                                                        '-DwxUSE_WEBVIEW=OFF', # breaks build on linux
                                                        '-DCMAKE_BUILD_TYPE=@0@'.format(build_type),
+                                                       '-DwxUSE_IMAGE=ON',
                                                        '-DwxBUILD_MONOLITHIC=ON']) # otherwise breaks project generation w/ meson
     deps += [
         wx.dependency('wxmono'),

src/libresrc/libresrc.cpp

@@ -23,8 +23,13 @@
 wxBitmap libresrc_getimage(const unsigned char *buff, size_t size, double scale, int dir) {
 	wxMemoryInputStream mem(buff, size);
 	if (dir != wxLayout_RightToLeft)
+#ifdef __WXMAC__
 		return wxBitmap(wxImage(mem), -1, scale);
 	return wxBitmap(wxImage(mem).Mirror(), -1, scale);
+#else
+		return wxBitmap(wxImage(mem));
+	return wxBitmap(wxImage(mem).Mirror());
+#endif
 }
 
 wxIcon libresrc_geticon(const unsigned char *buff, size_t size) {