kc3-lang/angle/samples/sample_util/SampleApplication.cpp

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• Author : Luc Ferron
  Date : 2018-06-18 08:28:50
  Hash : 17cee572
  Message : SampleApps: Refactor to use cli args the same way Bug: angleproject:2669 Change-Id: Ica5b49e63e8af69595cdde3737b0aa1808d7d841 Reviewed-on: https://chromium-review.googlesource.com/1104377 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Luc Ferron <lucferron@chromium.org>

• samples/sample_util/SampleApplication.cpp

• //
  // Copyright (c) 2013 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.
  //
  
  #include "SampleApplication.h"
  #include "EGLWindow.h"
  #include "random_utils.h"
  
  #include "angle_gl.h"
  
  #include <string.h>
  #include <iostream>
  #include <utility>
  
  namespace
  {
  const char *kUseAngleArg = "--use-angle=";
  
  using DisplayTypeInfo = std::pair<const char *, EGLint>;
  
  const DisplayTypeInfo kDisplayTypes[] = {
      {"d3d9", EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE}, {"d3d11", EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE},
      {"gl", EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE}, {"gles", EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE},
      {"null", EGL_PLATFORM_ANGLE_TYPE_NULL_ANGLE}, {"vulkan", EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE}};
  
  EGLint GetDisplayTypeFromArg(const char *displayTypeArg)
  {
      for (const auto &displayTypeInfo : kDisplayTypes)
      {
          if (strcmp(displayTypeInfo.first, displayTypeArg) == 0)
          {
              std::cout << "Using ANGLE back-end API: " << displayTypeInfo.first << std::endl;
              return displayTypeInfo.second;
          }
      }
  
      std::cout << "Unknown ANGLE back-end API: " << displayTypeArg << std::endl;
      return EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE;
  }
  }  // anonymous namespace
  
  SampleApplication::SampleApplication(std::string name,
                                       int argc,
                                       char **argv,
                                       EGLint glesMajorVersion,
                                       EGLint glesMinorVersion,
                                       size_t width,
                                       size_t height)
      : mName(std::move(name)), mWidth(width), mHeight(height), mRunning(false)
  {
      EGLint requestedRenderer = EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE;
  
      if (argc > 1 && strncmp(argv[1], kUseAngleArg, strlen(kUseAngleArg)) == 0)
      {
          requestedRenderer = GetDisplayTypeFromArg(argv[1] + strlen(kUseAngleArg));
      }
  
      mEGLWindow.reset(new EGLWindow(glesMajorVersion, glesMinorVersion,
                                     EGLPlatformParameters(requestedRenderer)));
      mTimer.reset(CreateTimer());
      mOSWindow.reset(CreateOSWindow());
  
      mEGLWindow->setConfigRedBits(8);
      mEGLWindow->setConfigGreenBits(8);
      mEGLWindow->setConfigBlueBits(8);
      mEGLWindow->setConfigAlphaBits(8);
      mEGLWindow->setConfigDepthBits(24);
      mEGLWindow->setConfigStencilBits(8);
  
      // Disable vsync
      mEGLWindow->setSwapInterval(0);
  }
  
  SampleApplication::~SampleApplication()
  {
  }
  
  bool SampleApplication::initialize()
  {
      return true;
  }
  
  void SampleApplication::destroy()
  {
  }
  
  void SampleApplication::step(float dt, double totalTime)
  {
  }
  
  void SampleApplication::draw()
  {
  }
  
  void SampleApplication::swap()
  {
      mEGLWindow->swap();
  }
  
  OSWindow *SampleApplication::getWindow() const
  {
      return mOSWindow.get();
  }
  
  EGLConfig SampleApplication::getConfig() const
  {
      return mEGLWindow->getConfig();
  }
  
  EGLDisplay SampleApplication::getDisplay() const
  {
      return mEGLWindow->getDisplay();
  }
  
  EGLSurface SampleApplication::getSurface() const
  {
      return mEGLWindow->getSurface();
  }
  
  EGLContext SampleApplication::getContext() const
  {
      return mEGLWindow->getContext();
  }
  
  int SampleApplication::run()
  {
      if (!mOSWindow->initialize(mName, mWidth, mHeight))
      {
          return -1;
      }
  
      mOSWindow->setVisible(true);
  
      if (!mEGLWindow->initializeGL(mOSWindow.get()))
      {
          return -1;
      }
  
      mRunning = true;
      int result = 0;
  
      if (!initialize())
      {
          mRunning = false;
          result = -1;
      }
  
      mTimer->start();
      double prevTime = 0.0;
  
      while (mRunning)
      {
          double elapsedTime = mTimer->getElapsedTime();
          double deltaTime = elapsedTime - prevTime;
  
          step(static_cast<float>(deltaTime), elapsedTime);
  
          // Clear events that the application did not process from this frame
          Event event;
          while (popEvent(&event))
          {
              // If the application did not catch a close event, close now
              if (event.Type == Event::EVENT_CLOSED)
              {
                  exit();
              }
          }
  
          if (!mRunning)
          {
              break;
          }
  
          draw();
          swap();
  
          mOSWindow->messageLoop();
  
          prevTime = elapsedTime;
      }
  
      destroy();
      mEGLWindow->destroyGL();
      mOSWindow->destroy();
  
      return result;
  }
  
  void SampleApplication::exit()
  {
      mRunning = false;
  }
  
  bool SampleApplication::popEvent(Event *event)
  {
      return mOSWindow->popEvent(event);
  }