Add --disable-wintab CLI option

This can be used to avoid loading wintab32.dll which sometimes locks
Aseprite loading.

src/app/app.cpp

@@ -146,6 +146,11 @@ App::App()
 
 void App::initialize(const AppOptions& options)
 {
+#ifdef _WIN32
+  if (options.disableWintab())
+    she::instance()->useWintabAPI(false);
+#endif
+
   m_isGui = options.startUI() && !options.previewCLI();
   m_isShell = options.startShell();
   m_coreModules = new CoreModules;

src/app/cli/app_options.cpp

@@ -70,6 +70,9 @@ AppOptions::AppOptions(int argc, const char* argv[])
   , m_oneFrame(m_po.add("oneframe").description("Load just the first frame"))
   , m_verbose(m_po.add("verbose").mnemonic('v').description("Explain what is being done"))
   , m_debug(m_po.add("debug").description("Extreme verbose mode and\ncopy log to desktop"))
+#ifdef _WIN32
+  , m_disableWintab(m_po.add("disable-wintab").description("Don't load wintab32.dll library"))
+#endif
   , m_help(m_po.add("help").mnemonic('?').description("Display this help and exits"))
   , m_version(m_po.add("version").description("Output version information and exit"))
 {
@@ -109,4 +112,11 @@ bool AppOptions::hasExporterParams() const
     m_po.enabled(m_sheet);
 }
 
+#ifdef _WIN32
+bool AppOptions::disableWintab() const
+{
+  return m_po.enabled(m_disableWintab);
+}
+#endif
+
 }

src/app/cli/app_options.h

@@ -84,6 +84,9 @@ public:
   const Option& oneFrame() const { return m_oneFrame; }
 
   bool hasExporterParams() const;
+#ifdef _WIN32
+  bool disableWintab() const;
+#endif
 
 private:
   std::string m_exeName;
@@ -140,6 +143,9 @@ private:
 
   Option& m_verbose;
   Option& m_debug;
+#ifdef _WIN32
+  Option& m_disableWintab;
+#endif
   Option& m_help;
   Option& m_version;
 

src/she/common/system.h

@@ -37,6 +37,9 @@ public:
   CommonSystem()
     : m_nativeDialogs(nullptr)
     , m_menus(nullptr) {
+#ifdef _WIN32
+    m_useWintabAPI = true;
+#endif
   }
 
   ~CommonSystem() {
@@ -48,6 +51,18 @@ public:
     delete this;
   }
 
+  void useWintabAPI(bool state) override {
+#ifdef _WIN32
+    m_useWintabAPI = state;
+#endif
+  }
+
+#ifdef _WIN32
+  bool useWintabAPI() const {
+    return m_useWintabAPI;
+  }
+#endif
+
   Logger* logger() override {
 #ifdef __APPLE__
     return getOsxLogger();
@@ -114,6 +129,9 @@ public:
   }
 
 private:
+#ifdef _WIN32
+  bool m_useWintabAPI;
+#endif
   NativeDialogs* m_nativeDialogs;
   Menus* m_menus;
   base::UniquePtr<ft::Lib> m_ft;

src/she/system.h

@@ -37,6 +37,12 @@ namespace she {
     virtual void activateApp() = 0;
     virtual void finishLaunching() = 0;
     virtual Capabilities capabilities() const = 0;
+
+    // Disables loading wintab32.dll (sometimes a program can be
+    // locked when we load the wintab32.dll, so we need a way to
+    // opt-out loading this library.)
+    virtual void useWintabAPI(bool enable) = 0;
+
     virtual Logger* logger() = 0;
     virtual Menus* menus() = 0;
     virtual NativeDialogs* nativeDialogs() = 0;

src/she/win/window.cpp

@@ -372,10 +372,10 @@ LRESULT WinWindow::wndProc(UINT msg, WPARAM wparam, LPARAM lparam)
     case WM_CREATE:
       LOG("WIN: Creating window %p\n", m_hwnd);
 
-      // Attach Wacom context
-      m_hpenctx =
-        static_cast<WindowSystem*>(she::instance())
-        ->penApi().open(m_hwnd);
+      if (system()->useWintabAPI()) {
+        // Attach Wacom context
+        m_hpenctx = system()->penApi().open(m_hwnd);
+      }
       break;
 
     case WM_DESTROY:
@@ -383,8 +383,7 @@ LRESULT WinWindow::wndProc(UINT msg, WPARAM wparam, LPARAM lparam)
           m_hwnd, m_hpenctx);
 
       if (m_hpenctx) {
-        static_cast<WindowSystem*>(she::instance())
-          ->penApi().close(m_hpenctx);
+        system()->penApi().close(m_hpenctx);
         m_hpenctx = nullptr;
       }
       break;
@@ -781,7 +780,7 @@ LRESULT WinWindow::wndProc(UINT msg, WPARAM wparam, LPARAM lparam)
     }
 
     case WT_CSRCHANGE: {    // From Wintab 1.1
-      auto& api = static_cast<WindowSystem*>(she::instance())->penApi();
+      auto& api = system()->penApi();
       UINT serial = wparam;
       HCTX ctx = (HCTX)lparam;
       PACKET packet;
@@ -810,7 +809,7 @@ LRESULT WinWindow::wndProc(UINT msg, WPARAM wparam, LPARAM lparam)
     }
 
     case WT_PACKET: {
-      auto& api = static_cast<WindowSystem*>(she::instance())->penApi();
+      auto& api = system()->penApi();
       UINT serial = wparam;
       HCTX ctx = (HCTX)lparam;
       PACKET packet;
@@ -938,4 +937,10 @@ LRESULT CALLBACK WinWindow::staticWndProc(HWND hwnd, UINT msg, WPARAM wparam, LP
   }
 }
 
+// static
+WindowSystem* WinWindow::system()
+{
+  return static_cast<WindowSystem*>(she::instance());
+}
+
 } // namespace she

src/she/win/window.h

@@ -19,6 +19,7 @@
 namespace she {
   class Event;
   class Surface;
+  class WindowSystem;
 
   class WinWindow {
   public:
@@ -62,6 +63,8 @@ namespace she {
     static HWND createHwnd(WinWindow* self, int width, int height);
     static LRESULT CALLBACK staticWndProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam);
 
+    static WindowSystem* system();
+
     mutable HWND m_hwnd;
     HCURSOR m_hcursor;
     gfx::Size m_clientSize;