kc3-lang/angle/src/common/system_utils_winuwp.cpp

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• Hash : 11dc1635
  Author :
  Date : 2019-09-18T14:46:23
  

  Add support for generating UWP (Windows Store) projects again
  
  Until late 2017, ANGLE supported  Windows Store apps on Windows 8.1,
  Windows Phone 8.1, and Windows 10 (via the Universal Windows
  Platform, aka UWP).
  
  Unfortunately ANGLE deprecated support for Windows Store when it
  switched from GYP to GN in 2017. Since then, users have been able
  to use Microsoft\angle for their UWP apps but this isn't ideal since
  it's based on a 2017 copy of Google\angle.
  
  This PR bring back support for UWPs, so that UWP users can use
  Google\angle again. Specifically it:
  
  - Adds support for generating UWP projects via GN
  - Adds helper/util functions specific to UWP (they're mostly
  similar to the desktop Windows helpers)
  - Fixes some existing Windows Store code that's rotted since 2017
  - Disables async shader compilation for UWPs, since its
  implementation calls wait on the UI thread (which is forbidden
  in UWPs)
  - Renames 'ANGLE_ENABLE_WINDOWS_STORE' to
  'ANGLE_ENABLE_WINDOWS_UWP', since ANGLE only support UWPs now
  - Fixes misc other related issues (such as dependencies on D3D9
  headers in API-agnostic code)
  
  Note that this doesn't bring back support for Windows/Phone 8.1.
  
  BUG=angleproject:3922
  
  Change-Id: Ia79ae05a5e0e0a0625eb633bf1928722dfd3e85f
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1811871
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/common/system_utils_winuwp.cpp

• //
  // Copyright 2019 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // system_utils_winuwp.cpp: Implementation of OS-specific functions for Windows UWP
  
  #include "system_utils.h"
  
  #include <stdarg.h>
  #include <windows.h>
  #include <array>
  #include <codecvt>
  #include <locale>
  #include <string>
  #include <vector>
  
  #include "common/debug.h"
  
  namespace angle
  {
  
  bool SetEnvironmentVar(const char *variableName, const char *value)
  {
      // Not supported for UWP
      return false;
  }
  
  std::string GetEnvironmentVar(const char *variableName)
  {
      // Not supported for UWP
      return "";
  }
  
  const char *GetSharedLibraryExtension()
  {
      return "dll";
  }
  
  const char *GetPathSeparator()
  {
      return ";";
  }
  
  double GetCurrentTime()
  {
      LARGE_INTEGER frequency = {};
      QueryPerformanceFrequency(&frequency);
  
      LARGE_INTEGER curTime;
      QueryPerformanceCounter(&curTime);
  
      return static_cast<double>(curTime.QuadPart) / frequency.QuadPart;
  }
  
  class UwpLibrary : public Library
  {
    public:
      UwpLibrary(const char *libraryName, SearchType searchType)
      {
          char buffer[MAX_PATH];
          int ret = snprintf(buffer, MAX_PATH, "%s.%s", libraryName, GetSharedLibraryExtension());
  
          std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
          std::wstring wideBuffer = converter.from_bytes(buffer);
  
          if (ret > 0 && ret < MAX_PATH)
          {
              switch (searchType)
              {
                  case SearchType::ApplicationDir:
                      mModule = LoadPackagedLibrary(wideBuffer.c_str(), 0);
                      break;
                  case SearchType::SystemDir:
                      // Not supported in UWP
                      break;
              }
          }
      }
  
      ~UwpLibrary() override
      {
          if (mModule)
          {
              FreeLibrary(mModule);
          }
      }
  
      void *getSymbol(const char *symbolName) override
      {
          if (!mModule)
          {
              return nullptr;
          }
  
          return reinterpret_cast<void *>(GetProcAddress(mModule, symbolName));
      }
  
      void *getNative() const override { return reinterpret_cast<void *>(mModule); }
  
    private:
      HMODULE mModule = nullptr;
  };
  
  Library *OpenSharedLibrary(const char *libraryName, SearchType searchType)
  {
      return new UwpLibrary(libraryName, searchType);
  }
  
  bool IsDebuggerAttached()
  {
      return !!::IsDebuggerPresent();
  }
  
  void BreakDebugger()
  {
      __debugbreak();
  }
  }  // namespace angle
  

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