Patch thirdy-party libraries to build for WinRT

- Patch enet code.
- Patch OpenSSL code and add shims for unavailable API.
- Add extra definition header for Freetype.

5 files changed, 233 insertions, 2 deletions

diff --git a/drivers/builtin_openssl2/SCsub b/drivers/builtin_openssl2/SCsub
index bd0f428cfc..a28bc2922c 100644
--- a/drivers/builtin_openssl2/SCsub
+++ b/drivers/builtin_openssl2/SCsub
@@ -642,6 +642,7 @@ openssl_sources = [
 
 #env.drivers_sources+=openssl_sources
 
+env.Append(CPPPATH=["#drivers/builtin_openssl2"])
 env_drivers.Append(CPPPATH=["#drivers/builtin_openssl2/crypto"])
 env_drivers.Append(CPPPATH=["#drivers/builtin_openssl2/openssl"])
 env_drivers.Append(CPPPATH=["#drivers/builtin_openssl2/crypto/evp"])
@@ -650,6 +651,9 @@ env_drivers.Append(CPPPATH=["#drivers/builtin_openssl2/crypto/modes"])
 #env_ssl.Append(CPPPATH=["#drivers/builtin_openssl2/crypto/store"])
 env_drivers.Append(CPPFLAGS=["-DOPENSSL_NO_ASM","-DOPENSSL_THREADS","-DL_ENDIAN"])
 
+if "platform" in env and env["platform"] == "winrt":
+	openssl_sources += ['winrt.cpp']
+
 # Workaround for compilation error with GCC/Clang when -Werror is too greedy (GH-4517)
 import os
 if not (os.name=="nt" and os.getenv("VSINSTALLDIR")!=None): # not Windows and not MSVC
diff --git a/drivers/builtin_openssl2/crypto/rand/rand_win.c b/drivers/builtin_openssl2/crypto/rand/rand_win.c
index 06670ae017..70fd52a7aa 100644
--- a/drivers/builtin_openssl2/crypto/rand/rand_win.c
+++ b/drivers/builtin_openssl2/crypto/rand/rand_win.c
@@ -118,8 +118,10 @@
 # ifndef _WIN32_WINNT
 #  define _WIN32_WINNT 0x0400
 # endif
+#ifndef WINRT_ENABLED
 # include <wincrypt.h>
 # include <tlhelp32.h>
+#endif
 
 /*
  * Limit the time spent walking through the heap, processes, threads and
@@ -161,7 +163,7 @@ typedef struct tagCURSORINFO {
 #  define CURSOR_SHOWING     0x00000001
 # endif                         /* CURSOR_SHOWING */
 
-# if !defined(OPENSSL_SYS_WINCE)
+# if !defined(OPENSSL_SYS_WINCE) && !defined(WINRT_ENABLED)
 typedef BOOL(WINAPI *CRYPTACQUIRECONTEXTW) (HCRYPTPROV *, LPCWSTR, LPCWSTR,
                                             DWORD, DWORD);
 typedef BOOL(WINAPI *CRYPTGENRANDOM) (HCRYPTPROV, DWORD, BYTE *);
@@ -196,6 +198,7 @@ typedef NET_API_STATUS(NET_API_FUNCTION *NETFREE) (LPBYTE);
 #  endif                        /* 1 */
 # endif                         /* !OPENSSL_SYS_WINCE */
 
+#if !defined(WINRT_ENABLED)
 int RAND_poll(void)
 {
     MEMORYSTATUS m;
@@ -580,6 +583,8 @@ int RAND_poll(void)
     return (1);
 }
 
+#endif // WINRT_ENABLED
+
 int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
 {
     double add_entropy = 0;
@@ -682,7 +687,7 @@ static void readtimer(void)
 
 static void readscreen(void)
 {
-# if !defined(OPENSSL_SYS_WINCE) && !defined(OPENSSL_SYS_WIN32_CYGWIN)
+# if !defined(OPENSSL_SYS_WINCE) && !defined(OPENSSL_SYS_WIN32_CYGWIN) && !defined(WINRT_ENABLED)
     HDC hScrDC;                 /* screen DC */
     HBITMAP hBitmap;            /* handle for our bitmap */
     BITMAP bm;                  /* bitmap properties */
diff --git a/drivers/builtin_openssl2/openssl/dtls1.h b/drivers/builtin_openssl2/openssl/dtls1.h
index 64ad3c87d0..a58aca248d 100644
--- a/drivers/builtin_openssl2/openssl/dtls1.h
+++ b/drivers/builtin_openssl2/openssl/dtls1.h
@@ -81,6 +81,9 @@
 #   include <sys/time.h>
 #  endif
 # endif
+#ifdef WINRT_ENABLED
+#include <winsock2.h>
+#endif
 
 #ifdef  __cplusplus
 extern "C" {
diff --git a/drivers/builtin_openssl2/winrt.cpp b/drivers/builtin_openssl2/winrt.cpp
new file mode 100644
index 0000000000..c3a6f8bfcc
--- /dev/null
+++ b/drivers/builtin_openssl2/winrt.cpp
@@ -0,0 +1,155 @@
+/* Snippets extracted from https://github.com/Microsoft/openssl/blob/ec7e430e06e4e3ac87c183dee33cb216814cf980/ms/winrt.cpp
+ * Adapted for Godot definitions
+ */
+/* winrt.cpp
+ * Copyright 2014 Microsoft Corporation
+ * C++/CX Entropy/shims for Windows Phone/Windows Store platform
+ * written by Alejandro Jimenez Martinez
+ * (aljim@microsoft.com) for the OpenSSL project 2014.
+ */
+
+#include <windows.h>
+#if defined(WINAPI_FAMILY)
+extern "C"
+{
+	unsigned entropyRT(BYTE *buffer, unsigned len);
+	void RAND_add(const void *buf,int num,double entropy);
+	int RAND_poll(void);
+}
+#endif
+
+unsigned entropyRT(BYTE *buffer, unsigned len)
+	{
+	using namespace Platform;
+	using namespace Windows::Foundation;
+	using namespace Windows::Foundation::Collections;
+	using namespace Windows::Security::Cryptography;
+	using namespace Windows::Storage::Streams;
+	IBuffer ^buf = CryptographicBuffer::GenerateRandom(len);
+	Array<unsigned char> ^arr;
+	CryptographicBuffer::CopyToByteArray(buf, &arr);
+	unsigned arrayLen = arr->Length;
+
+	// Make sure not to overflow the copy
+	arrayLen = (arrayLen > len) ? len : arrayLen;
+	memcpy(buffer, arr->Data, arrayLen);
+	return arrayLen;
+	}
+
+int RAND_poll(void)
+	{
+	BYTE buf[60];
+	unsigned collected = entropyRT(buf , sizeof(buf));
+	RAND_add(buf, collected, collected);
+	return 1;
+	}
+
+#if defined(WINRT_ENABLED)
+extern "C"
+{
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+
+	void* GetModuleHandle(
+						 _In_opt_  LPCTSTR lpModuleName
+						 )
+		{
+		return NULL;
+		}
+	//no log for phone
+	int RegisterEventSource(
+						   _In_  LPCTSTR lpUNCServerName,
+						   _In_  LPCTSTR lpSourceName
+						   )
+		{
+		return NULL;
+		}
+
+	int ReportEvent(
+				   _In_  HANDLE hEventLog,
+				   _In_  WORD wType,
+				   _In_  WORD wCategory,
+				   _In_  DWORD dwEventID,
+				   _In_  PSID lpUserSid,
+				   _In_  WORD wNumStrings,
+				   _In_  DWORD dwDataSize,
+				   _In_  LPCTSTR *lpStrings,
+				   _In_  LPVOID lpRawData
+				   )
+		{
+		return 0;
+		}
+	int MessageBox(
+				  _In_opt_  HWND hWnd,
+				  _In_opt_  LPCTSTR lpText,
+				  _In_opt_  LPCTSTR lpCaption,
+				  _In_      UINT uType
+				  )
+		{
+		return 0;
+		}
+	int __cdecl GetProcessWindowStation(void)
+		{
+		return NULL;
+		}
+	BOOL __cdecl GetUserObjectInformationW(
+										 _In_       HANDLE hObj,
+										 _In_       int nIndex,
+										 _Out_opt_  PVOID pvInfo,
+										 _In_       DWORD nLength,
+										 _Out_opt_  LPDWORD lpnLengthNeeded
+										 )
+		{
+		return 0;
+		}
+	int __cdecl GetStdHandle(
+						   _In_  DWORD nStdHandle
+						   )
+		{
+		return 0;
+		}
+	BOOL DeregisterEventSource(
+							  _Inout_  HANDLE hEventLog
+							  )
+		{
+		return 0;
+		}
+	char *getenv(
+					  const char *varname
+					  )
+		{
+		//hardcoded environmental variables used for the appx testing application for store/phone
+		if (!strcmp(varname, "OPENSSL_CONF"))
+			{
+			return "./openssl.cnf";
+			}
+		return 0;
+		}
+	int setenv(const char *envname, const char *envval, int overwrite)
+		{
+		return -1;
+		}
+	int _getch(void)
+		{
+		return 0;
+		}
+	int _kbhit()
+		{
+		return 0;
+		}
+	BOOL __cdecl FlushConsoleInputBuffer(
+									   _In_  HANDLE hConsoleInput
+									   )
+		{
+		return 0;
+		}
+	int winrt_GetTickCount(void)
+		{
+		LARGE_INTEGER t;
+		return(int) (QueryPerformanceCounter(&t) ? t.QuadPart : 0);
+		}
+	void *OPENSSL_UplinkTable [26]= {0};
+} //extern C
+
+#endif /*defined(WINRT_ENABLED)*/
diff --git a/drivers/builtin_openssl2/winrt_fix.patch b/drivers/builtin_openssl2/winrt_fix.patch
new file mode 100644
index 0000000000..caf180a75b
--- /dev/null
+++ b/drivers/builtin_openssl2/winrt_fix.patch
@@ -0,0 +1,64 @@
+diff --git a/drivers/builtin_openssl2/crypto/rand/rand_win.c b/drivers/builtin_openssl2/crypto/rand/rand_win.c
+index 06670ae..70fd52a 100644
+--- a/drivers/builtin_openssl2/crypto/rand/rand_win.c
++++ b/drivers/builtin_openssl2/crypto/rand/rand_win.c
+@@ -118,8 +118,10 @@
+ # ifndef _WIN32_WINNT
+ #  define _WIN32_WINNT 0x0400
+ # endif
++#ifndef WINRT_ENABLED
+ # include <wincrypt.h>
+ # include <tlhelp32.h>
++#endif
+ 
+ /*
+  * Limit the time spent walking through the heap, processes, threads and
+@@ -161,7 +163,7 @@ typedef struct tagCURSORINFO {
+ #  define CURSOR_SHOWING     0x00000001
+ # endif                         /* CURSOR_SHOWING */
+ 
+-# if !defined(OPENSSL_SYS_WINCE)
++# if !defined(OPENSSL_SYS_WINCE) && !defined(WINRT_ENABLED)
+ typedef BOOL(WINAPI *CRYPTACQUIRECONTEXTW) (HCRYPTPROV *, LPCWSTR, LPCWSTR,
+                                             DWORD, DWORD);
+ typedef BOOL(WINAPI *CRYPTGENRANDOM) (HCRYPTPROV, DWORD, BYTE *);
+@@ -196,6 +198,7 @@ typedef NET_API_STATUS(NET_API_FUNCTION *NETFREE) (LPBYTE);
+ #  endif                        /* 1 */
+ # endif                         /* !OPENSSL_SYS_WINCE */
+ 
++#if !defined(WINRT_ENABLED)
+ int RAND_poll(void)
+ {
+     MEMORYSTATUS m;
+@@ -580,6 +583,8 @@ int RAND_poll(void)
+     return (1);
+ }
+ 
++#endif // WINRT_ENABLED
++
+ int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
+ {
+     double add_entropy = 0;
+@@ -682,7 +687,7 @@ static void readtimer(void)
+ 
+ static void readscreen(void)
+ {
+-# if !defined(OPENSSL_SYS_WINCE) && !defined(OPENSSL_SYS_WIN32_CYGWIN)
++# if !defined(OPENSSL_SYS_WINCE) && !defined(OPENSSL_SYS_WIN32_CYGWIN) && !defined(WINRT_ENABLED)
+     HDC hScrDC;                 /* screen DC */
+     HBITMAP hBitmap;            /* handle for our bitmap */
+     BITMAP bm;                  /* bitmap properties */
+diff --git a/drivers/builtin_openssl2/openssl/dtls1.h b/drivers/builtin_openssl2/openssl/dtls1.h
+index 64ad3c8..a58aca2 100644
+--- a/drivers/builtin_openssl2/openssl/dtls1.h
++++ b/drivers/builtin_openssl2/openssl/dtls1.h
+@@ -81,6 +81,9 @@
+ #   include <sys/time.h>
+ #  endif
+ # endif
++#ifdef WINRT_ENABLED
++#include <winsock2.h>
++#endif
+ 
+ #ifdef  __cplusplus
+ extern "C" {