shell_main.cc

// Copyright (c) 2012 Intel Corp
// Copyright (c) 2012 The Chromium Authors
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy 
// of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell co
// pies of the Software, and to permit persons to whom the Software is furnished
//  to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in al
// l copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IM
// PLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNES
// S FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
//  OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WH
// ETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
//  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#include "content/public/app/content_main.h"

#include "base/command_line.h"
#include "content/nw/src/shell_main_delegate.h"
#include "sandbox/win/src/sandbox_types.h"

#if defined(OS_WIN)
#include <windows.h>
#include <shellscalingapi.h>

#include "base/win/win_util.h"
#include "base/win/windows_version.h"
#include "content/public/app/startup_helper_win.h"
#include "ui/gfx/win/dpi.h"
#endif

#if defined(OS_MACOSX)
#include "shell_content_main.h"
#endif

using base::CommandLine;

#if defined(OS_WIN)

// Win8.1 supports monitor-specific DPI scaling.
bool SetProcessDpiAwarenessWrapper(PROCESS_DPI_AWARENESS value) {
  typedef HRESULT(WINAPI *SetProcessDpiAwarenessPtr)(PROCESS_DPI_AWARENESS);
  SetProcessDpiAwarenessPtr set_process_dpi_awareness_func =
      reinterpret_cast<SetProcessDpiAwarenessPtr>(
          GetProcAddress(GetModuleHandleA("user32.dll"),
                         "SetProcessDpiAwarenessInternal"));
  if (set_process_dpi_awareness_func) {
    HRESULT hr = set_process_dpi_awareness_func(value);
    if (SUCCEEDED(hr)) {
      VLOG(1) << "SetProcessDpiAwareness succeeded.";
      return true;
    } else if (hr == E_ACCESSDENIED) {
      LOG(ERROR) << "Access denied error from SetProcessDpiAwareness. "
          "Function called twice, or manifest was used.";
    }
  }
  return false;
}

// This function works for Windows Vista through Win8. Win8.1 must use
// SetProcessDpiAwareness[Wrapper].
BOOL SetProcessDPIAwareWrapper() {
  typedef BOOL(WINAPI *SetProcessDPIAwarePtr)(VOID);
  SetProcessDPIAwarePtr set_process_dpi_aware_func =
      reinterpret_cast<SetProcessDPIAwarePtr>(
      GetProcAddress(GetModuleHandleA("user32.dll"),
                      "SetProcessDPIAware"));
  return set_process_dpi_aware_func &&
    set_process_dpi_aware_func();
}

void EnableHighDPISupport() {
  if (!SetProcessDpiAwarenessWrapper(PROCESS_SYSTEM_DPI_AWARE)) {
    SetProcessDPIAwareWrapper();
  }
}

int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE, wchar_t*, int) {
  CommandLine::Init(0, NULL);

  if (base::win::GetVersion() >= base::win::VERSION_WIN7)
    EnableHighDPISupport();

  sandbox::SandboxInterfaceInfo sandbox_info = {0};
  content::InitializeSandboxInfo(&sandbox_info);
  content::ShellMainDelegate delegate;
  content::ContentMainParams params(&delegate);
  params.instance = instance;
  params.sandbox_info = &sandbox_info;
  int rv = content::ContentMain(params);
  base::win::SetShouldCrashOnProcessDetach(false);
  return rv;
}

#else

int main(int argc, const char** argv) {
#if defined(OS_MACOSX)
  // Do the delegate work in shell_content_main to avoid having to export the
  // delegate types.
  return ::ContentMain(argc, argv);
#else
  content::ShellMainDelegate delegate;
  content::ContentMainParams params(&delegate);
  params.argc = argc;
  params.argv = argv;
  return content::ContentMain(params);
#endif  // OS_MACOSX
}

#endif  // OS_POSIX