Windows: load WinSparkle.dll as a resource

Add cmake glue and necessary code to load WinSparkle.dll as a binary
resource that gets written out to a temp file and loaded with
wxDynamicLibrary.

Object lifetime of the dll wrapper is handled by the app.

The API is the same as the winsparkle API, the only change required is
changing:

`#include <winsparkle.h>`

to:

`#include "winsparkle-wrapper.h"`

and handle the lifetime of a WinSparkleDllWrapper object.

On destruction the temp file is removed.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

src/wx/CMakeLists.txt

@@ -696,8 +696,14 @@ set(
     # from external source with minor modifications
     widgets/wx/checkedlistctrl.h
     ../common/version_cpp.h
+    winsparkle-wrapper.h
 )
 
+if(WIN32)
+    list(APPEND SRC_WX winsparkle-wrapper.cpp)
+    list(APPEND HDR_WX winsparkle-wrapper.h)
+endif()
+
 set(
     RES_WX
     ${XRC_SOURCES}
@@ -757,6 +763,25 @@ add_executable(
     ${CM_STUFF}
 )
 
+if(WIN32 AND (AMD64 OR X86_32))
+    if(NOT DEFINED WINSPARKLE_BIN_RELEASE_DIR)
+        set(WINSPARKLE_BIN_RELEASE_DIR ${CMAKE_SOURCE_DIR}/dependencies/WinSparkle-0.6.0)
+    endif()
+
+    target_include_directories(
+        visualboyadvance-m
+        PRIVATE ${WINSPARKLE_BIN_RELEASE_DIR}/include
+    )
+
+    if(AMD64)
+        set(WINSPARKLE_DLL ${CMAKE_SOURCE_DIR}/dependencies/WinSparkle-0.6.0/x64/Release/WinSparkle.dll)
+    else()
+        set(WINSPARKLE_DLL ${CMAKE_SOURCE_DIR}/dependencies/WinSparkle-0.6.0/Release/WinSparkle.dll)
+    endif()
+
+    configure_file(winsparkle-path.h.in ${CMAKE_BINARY_DIR}/winsparkle-path.h)
+endif()
+
 target_link_libraries(
     visualboyadvance-m
     ${VBAMCORE_LIBS}

src/wx/winsparkle-path.h.in

@@ -0,0 +1 @@
+#define WINSPARKLE_DLL_PATH "@WINSPARKLE_DLL@"

src/wx/winsparkle-wrapper.cpp

@@ -0,0 +1,93 @@
+#include <stdexcept>
+
+#include "wxvbam.h"
+#include "winsparkle-wrapper.h"
+#include "wx/msw/private.h"
+
+wxDynamicLibrary                      *winsparkle_dll                  = nullptr;
+
+typedef void (*func_win_sparkle_init)();
+func_win_sparkle_init                 winsparkle_init                 = nullptr;
+
+typedef void (*func_win_sparkle_check_update_with_ui)();
+func_win_sparkle_check_update_with_ui winsparkle_check_update_with_ui = nullptr;
+
+typedef void (*func_win_sparkle_set_appcast_url)(const char *);
+func_win_sparkle_set_appcast_url      winsparkle_set_appcast_url      = nullptr;
+
+typedef void (*func_win_sparkle_set_app_details)(const wchar_t*, const wchar_t*, const wchar_t*);
+func_win_sparkle_set_app_details      winsparkle_set_app_details      = nullptr;
+
+typedef void (*func_win_sparkle_cleanup)();
+func_win_sparkle_cleanup              winsparkle_cleanup              = nullptr;
+
+wxString *temp_file_name = nullptr;
+
+WinSparkleDllWrapper::WinSparkleDllWrapper()
+{
+    wxFile temp_file;
+    temp_file_name = new wxString(wxFileName::CreateTempFileName("winsparkle", &temp_file));
+
+    HRSRC res = FindResource(wxGetInstance(), MAKEINTRESOURCE(WINSPARKLE_DLL_RC), RT_RCDATA);
+
+    if (!res)
+	wxLogFatalError("Could not find resource for winsparkle DLL.");
+
+    HGLOBAL res_handle = LoadResource(NULL, res);
+
+    if (!res_handle)
+	wxLogFatalError("Could not load resource for winsparkle DLL.");
+
+    uint64_t res_size = SizeofResource(NULL, res);
+
+    char *res_data = (char *)LockResource(res_handle);
+
+    temp_file.Write((void *)res_data, res_size);
+
+    temp_file.Close();
+
+    winsparkle_dll = new wxDynamicLibrary(*temp_file_name, wxDL_NOW | wxDL_VERBATIM);
+
+    winsparkle_init                 = reinterpret_cast<func_win_sparkle_init>(winsparkle_dll->GetSymbol("win_sparkle_init"));
+    winsparkle_check_update_with_ui = reinterpret_cast<func_win_sparkle_check_update_with_ui>(winsparkle_dll->GetSymbol("win_sparkle_check_update_with_ui"));
+    winsparkle_set_appcast_url      = reinterpret_cast<func_win_sparkle_set_appcast_url>(winsparkle_dll->GetSymbol("win_sparkle_set_appcast_url"));
+    winsparkle_set_app_details      = reinterpret_cast<func_win_sparkle_set_app_details>(winsparkle_dll->GetSymbol("win_sparkle_set_app_details"));
+    winsparkle_cleanup              = reinterpret_cast<func_win_sparkle_cleanup>(winsparkle_dll->GetSymbol("win_sparkle_cleanup"));
+}
+
+WinSparkleDllWrapper::~WinSparkleDllWrapper()
+{
+    delete winsparkle_dll;
+
+    wxRemoveFile(*temp_file_name);
+
+    delete temp_file_name;
+}
+
+void win_sparkle_init()
+{
+    winsparkle_init();
+}
+
+void win_sparkle_check_update_with_ui()
+{
+    winsparkle_check_update_with_ui();
+}
+
+
+void win_sparkle_set_appcast_url(const char *url)
+{
+    winsparkle_set_appcast_url(url);
+}
+
+
+void win_sparkle_set_app_details(const wchar_t *company_name, const wchar_t *app_name, const wchar_t *app_version)
+{
+    winsparkle_set_app_details(company_name, app_name, app_version);
+}
+
+
+void win_sparkle_cleanup()
+{
+    winsparkle_cleanup();
+}

src/wx/winsparkle-wrapper.h

@@ -0,0 +1,17 @@
+#ifndef WINSPARKLE_WRAPPER_H
+#define WINSPARKLE_WRAPPER_H
+
+#define WINSPARKLE_DLL_RC 300
+
+struct WinSparkleDllWrapper {
+    WinSparkleDllWrapper();
+    ~WinSparkleDllWrapper();
+};
+
+void win_sparkle_init();
+void win_sparkle_check_update_with_ui();
+void win_sparkle_set_appcast_url(const char *url);
+void win_sparkle_set_app_details(const wchar_t *company_name, const wchar_t *app_name, const wchar_t *app_version);
+void win_sparkle_cleanup();
+
+#endif /* WINSPARKLE_WRAPPER_H */

src/wx/wxvbam.h

@@ -73,6 +73,7 @@ inline std::string ToString(const wxChar* aString)
 }
 
 class MainFrame;
+class WinSparkleDllWrapper;
 
 class wxvbamApp : public wxApp {
 public:
@@ -156,7 +157,8 @@ protected:
 
 private:
     wxPathList config_path;
-    char* home = NULL;
+    char* home = nullptr;
+    WinSparkleDllWrapper *winsparkle = nullptr;
 };
 
 DECLARE_APP(wxvbamApp);

src/wx/wxvbam.rc

@@ -5,6 +5,9 @@ AAAAA_MAINICON ICON "icons/vbam.ico"
 
 #include "version.h"
 
+#include "winsparkle-wrapper.h"
+#include "winsparkle-path.h"
+
 /////////////////////////////////////////////////////////////////////////////
 //
 // Version
@@ -13,6 +16,8 @@ AAAAA_MAINICON ICON "icons/vbam.ico"
 #define VER_PRODUCTVERSION	VER_FILEVERSION
 #define VER_PRODUCTVERSION_STR	VER_FILEVERSION_STR
 
+WINSPARKLE_DLL_RC RCDATA WINSPARKLE_DLL_PATH
+
 VS_VERSION_INFO VERSIONINFO
  FILEVERSION VER_FILEVERSION
  PRODUCTVERSION VER_PRODUCTVERSION