Add bypass for buggy wintab32.dll

src/she/win/pen.cpp

@@ -10,9 +10,11 @@
 
 #include "she/win/pen.h"
 
+#include "base/convert_to.h"
 #include "base/debug.h"
 #include "base/fs.h"
 #include "base/log.h"
+#include "base/sha1.h"
 #include "base/string.h"
 
 #include <iostream>
@@ -136,6 +138,12 @@ bool PenAPI::loadWintab()
     return false;
   }
 
+  if (isBuggyDll()) {
+    base::unload_dll(m_wintabLib);
+    m_wintabLib = nullptr;
+    return false;
+  }
+
   WTInfo = base::get_dll_proc<WTInfoW_Func>(m_wintabLib, "WTInfoW");
   WTOpen = base::get_dll_proc<WTOpenW_Func>(m_wintabLib, "WTOpenW");
   WTClose = base::get_dll_proc<WTClose_Func>(m_wintabLib, "WTClose");
@@ -149,4 +157,25 @@ bool PenAPI::loadWintab()
   return true;
 }
 
+bool PenAPI::isBuggyDll()
+{
+  ASSERT(m_wintabLib);
+
+  WCHAR wpath[MAX_PATH];
+  memset(wpath, 0, sizeof(wpath));
+  GetModuleFileNameW((HMODULE)m_wintabLib, wpath, sizeof(wpath) / sizeof(WCHAR));
+
+  // Ugly hack to bypass the buggy WALTOP International Corp .dll that
+  // hangs Aseprite completely when we call its WTInfo function.
+  std::string path = base::to_utf8(wpath);
+  if (base::is_file(path)) {
+    std::string checksum =
+      base::convert_to<std::string>(base::Sha1::calculateFromFile(path));
+    LOG("PEN: SHA1 <%s> of <%s>\n", checksum.c_str(), path.c_str());
+    if (checksum == "a3ba0d9c0f5d8b9f4070981b243a80579f8be105")
+      return true;
+  }
+  return false;
+}
+
 } // namespace she

src/she/win/pen.h

@@ -1,5 +1,5 @@
 // SHE library
-// Copyright (C) 2016  David Capello
+// Copyright (C) 2016-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
 // Read LICENSE.txt for more information.
@@ -32,6 +32,7 @@ namespace she {
 
   private:
     bool loadWintab();
+    bool isBuggyDll();
 
     base::dll m_wintabLib;
   };