kc3-lang/angle/util/EGLWindow.h

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• Author : Geoff Lang
  Date : 2019-04-12 14:48:59
  Hash : 057b76e1
  Message : Implement GL_CHROMIUM_lose_context. This is useful for testing context lost behaviour. BUG=angleproject:3379 Change-Id: If0e1538553b1761e313fc36ccde5138cd495200f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1566141 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>

• util/EGLWindow.h

• //
  // Copyright (c) 2014 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.
  //
  
  #ifndef UTIL_EGLWINDOW_H_
  #define UTIL_EGLWINDOW_H_
  
  #include <stdint.h>
  #include <list>
  #include <memory>
  #include <string>
  
  #include "common/Optional.h"
  #include "common/angleutils.h"
  #include "util/EGLPlatformParameters.h"
  #include "util/util_export.h"
  #include "util/util_gl.h"
  
  class OSWindow;
  
  namespace angle
  {
  class Library;
  struct PlatformMethods;
  }  // namespace angle
  
  struct ANGLE_UTIL_EXPORT ConfigParameters
  {
      ConfigParameters();
      ~ConfigParameters();
  
      void reset();
  
      static bool CanShareDisplay(const ConfigParameters &a, const ConfigParameters &b);
  
      // Display parameters.
      Optional<bool> debugLayersEnabled;
      Optional<bool> contextVirtualization;
      angle::PlatformMethods *platformMethods;
  
      // Surface and Context parameters.
      int redBits;
      int greenBits;
      int blueBits;
      int alphaBits;
      int depthBits;
      int stencilBits;
      int swapInterval;
  
      Optional<bool> webGLCompatibility;
      Optional<bool> robustResourceInit;
  
      // EGLWindow-specific.
      EGLenum componentType;
      bool multisample;
      bool debug;
      bool noError;
      Optional<bool> extensionsEnabled;
      bool bindGeneratesResource;
      bool clientArraysEnabled;
      bool robustAccess;
      EGLint samples;
      Optional<bool> contextProgramCacheEnabled;
      EGLenum resetStrategy;
  };
  
  class ANGLE_UTIL_EXPORT GLWindowBase : angle::NonCopyable
  {
    public:
      static void Delete(GLWindowBase **window);
  
      // It should also be possible to set multisample and floating point framebuffers.
      EGLint getClientMajorVersion() const { return mClientMajorVersion; }
      EGLint getClientMinorVersion() const { return mClientMinorVersion; }
  
      virtual bool initializeGL(OSWindow *osWindow,
                                angle::Library *glWindowingLibrary,
                                const ConfigParameters &config) = 0;
      virtual bool isGLInitialized() const                      = 0;
      virtual void swap()                                       = 0;
      virtual void destroyGL()                                  = 0;
      virtual void makeCurrent()                                = 0;
      virtual bool hasError() const                             = 0;
  
      int getConfigRedBits() const { return mConfigParams.redBits; }
      int getConfigGreenBits() const { return mConfigParams.greenBits; }
      int getConfigBlueBits() const { return mConfigParams.blueBits; }
      int getConfigAlphaBits() const { return mConfigParams.alphaBits; }
      int getConfigDepthBits() const { return mConfigParams.depthBits; }
      int getConfigStencilBits() const { return mConfigParams.stencilBits; }
      int getSwapInterval() const { return mConfigParams.swapInterval; }
  
      bool isMultisample() const { return mConfigParams.multisample; }
      bool isDebugEnabled() const { return mConfigParams.debug; }
  
      const angle::PlatformMethods *getPlatformMethods() const
      {
          return mConfigParams.platformMethods;
      }
  
      const ConfigParameters &getConfigParams() const { return mConfigParams; }
  
    protected:
      GLWindowBase(EGLint glesMajorVersion, EGLint glesMinorVersion);
      virtual ~GLWindowBase();
  
      EGLint mClientMajorVersion;
      EGLint mClientMinorVersion;
      ConfigParameters mConfigParams;
  };
  
  class ANGLE_UTIL_EXPORT EGLWindow : public GLWindowBase
  {
    public:
      static EGLWindow *New(EGLint glesMajorVersion,
                            EGLint glesMinorVersion,
                            const EGLPlatformParameters &platform);
      static void Delete(EGLWindow **window);
  
      static EGLBoolean FindEGLConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *config);
  
      void swap() override;
  
      const EGLPlatformParameters &getPlatform() const { return mPlatform; }
      EGLConfig getConfig() const;
      EGLDisplay getDisplay() const;
      EGLSurface getSurface() const;
      EGLContext getContext() const;
  
      // Internally initializes the Display, Surface and Context.
      bool initializeGL(OSWindow *osWindow,
                        angle::Library *glWindowingLibrary,
                        const ConfigParameters &params) override;
  
      // Only initializes the Display.
      bool initializeDisplay(OSWindow *osWindow,
                             angle::Library *glWindowingLibrary,
                             const ConfigParameters &params);
  
      // Only initializes the Surface.
      bool initializeSurface(OSWindow *osWindow,
                             angle::Library *glWindowingLibrary,
                             const ConfigParameters &params);
  
      // Create an EGL context with this window's configuration
      EGLContext createContext(EGLContext share) const;
  
      // Only initializes the Context.
      bool initializeContext();
  
      void destroyGL() override;
      void destroySurface();
      void destroyContext();
      bool isGLInitialized() const override;
      void makeCurrent() override;
      bool hasError() const override;
  
      bool isDisplayInitialized() const { return mDisplay != EGL_NO_DISPLAY; }
  
      static bool ClientExtensionEnabled(const std::string &extName);
  
    private:
      EGLWindow(EGLint glesMajorVersion,
                EGLint glesMinorVersion,
                const EGLPlatformParameters &platform);
  
      ~EGLWindow() override;
  
      EGLConfig mConfig;
      EGLDisplay mDisplay;
      EGLSurface mSurface;
      EGLContext mContext;
  
      EGLint mEGLMajorVersion;
      EGLint mEGLMinorVersion;
      EGLPlatformParameters mPlatform;
  };
  
  ANGLE_UTIL_EXPORT bool CheckExtensionExists(const char *allExtensions, const std::string &extName);
  
  #endif  // UTIL_EGLWINDOW_H_