kc3-lang/angle/src/libANGLE/Surface.h

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• Hash : 6c1f671b
  Author :
  Date : 2017-02-14T19:08:04
  

  Add destroy hooks for several GL objects.
  
  These hooks allow the back-end renderer to free object resources
  without having to store pointers to shared device handles for
  each and every object. This will allow us to save memory on
  back-ends that really care about memory overhead.
  
  There is a downside in that there is more boilerplate in passing
  gl::Context handles around everywhere.
  
  BUG=angleproject:1684
  
  Change-Id: I89463bba8d23f92920e8956650cb73c7fc6d66b7
  Reviewed-on: https://chromium-review.googlesource.com/426401
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/Surface.h

• //
  // Copyright (c) 2002-2014 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.
  //
  
  // Surface.h: Defines the egl::Surface class, representing a drawing surface
  // such as the client area of a window, including any back buffers.
  // Implements EGLSurface and related functionality. [EGL 1.4] section 2.2 page 3.
  
  #ifndef LIBANGLE_SURFACE_H_
  #define LIBANGLE_SURFACE_H_
  
  #include <EGL/egl.h>
  
  #include "common/angleutils.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/FramebufferAttachment.h"
  #include "libANGLE/RefCountObject.h"
  #include "libANGLE/formatutils.h"
  #include "libANGLE/renderer/SurfaceImpl.h"
  
  namespace gl
  {
  class Framebuffer;
  class Texture;
  }
  
  namespace rx
  {
  class EGLImplFactory;
  }
  
  namespace egl
  {
  class AttributeMap;
  class Display;
  struct Config;
  
  struct SurfaceState final : angle::NonCopyable
  {
      SurfaceState(const egl::Config *configIn);
  
      gl::Framebuffer *defaultFramebuffer;
      const egl::Config *config;
  };
  
  class Surface : public gl::FramebufferAttachmentObject
  {
    public:
      virtual ~Surface();
  
      rx::SurfaceImpl *getImplementation() const { return mImplementation; }
  
      EGLint getType() const;
  
      Error initialize(const Display &display);
      Error swap(const Display &display);
      Error swapWithDamage(EGLint *rects, EGLint n_rects);
      Error postSubBuffer(EGLint x, EGLint y, EGLint width, EGLint height);
      Error querySurfacePointerANGLE(EGLint attribute, void **value);
      Error bindTexImage(gl::Texture *texture, EGLint buffer);
      Error releaseTexImage(EGLint buffer);
  
      EGLint isPostSubBufferSupported() const;
  
      void setSwapInterval(EGLint interval);
      void setIsCurrent(Display *display, bool isCurrent);
      void onDestroy(Display *display);
  
      const Config *getConfig() const;
  
      // width and height can change with client window resizing
      EGLint getWidth() const;
      EGLint getHeight() const;
      EGLint getPixelAspectRatio() const;
      EGLenum getRenderBuffer() const;
      EGLenum getSwapBehavior() const;
      EGLenum getTextureFormat() const;
      EGLenum getTextureTarget() const;
  
      gl::Texture *getBoundTexture() const { return mTexture.get(); }
      gl::Framebuffer *getDefaultFramebuffer() { return mState.defaultFramebuffer; }
  
      EGLint isFixedSize() const;
  
      // FramebufferAttachmentObject implementation
      gl::Extents getAttachmentSize(const gl::FramebufferAttachment::Target &target) const override;
      const gl::Format &getAttachmentFormat(
          const gl::FramebufferAttachment::Target &target) const override;
      GLsizei getAttachmentSamples(const gl::FramebufferAttachment::Target &target) const override;
  
      void onAttach() override {}
      void onDetach() override {}
      GLuint getId() const override;
  
      bool flexibleSurfaceCompatibilityRequested() const
      {
          return mFlexibleSurfaceCompatibilityRequested;
      }
      EGLint getOrientation() const { return mOrientation; }
  
      bool directComposition() const { return mDirectComposition; }
  
    protected:
      Surface(EGLint surfaceType, const egl::Config *config, const AttributeMap &attributes);
      rx::FramebufferAttachmentObjectImpl *getAttachmentImpl() const override { return mImplementation; }
  
      gl::Framebuffer *createDefaultFramebuffer();
  
      // ANGLE-only method, used internally
      friend class gl::Texture;
      void releaseTexImageFromTexture();
  
      SurfaceState mState;
      rx::SurfaceImpl *mImplementation;
      int mCurrentCount;
      bool mDestroyed;
  
      EGLint mType;
  
      bool mPostSubBufferRequested;
      bool mFlexibleSurfaceCompatibilityRequested;
  
      bool mFixedSize;
      size_t mFixedWidth;
      size_t mFixedHeight;
  
      bool mDirectComposition;
  
      EGLenum mTextureFormat;
      EGLenum mTextureTarget;
  
      EGLint mPixelAspectRatio;      // Display aspect ratio
      EGLenum mRenderBuffer;         // Render buffer
      EGLenum mSwapBehavior;         // Buffer swap behavior
  
      EGLint mOrientation;
  
      BindingPointer<gl::Texture> mTexture;
  
      gl::Format mBackFormat;
      gl::Format mDSFormat;
  
    private:
      void destroy(const egl::Display *display);
  };
  
  class WindowSurface final : public Surface
  {
    public:
      WindowSurface(rx::EGLImplFactory *implFactory,
                    const Config *config,
                    EGLNativeWindowType window,
                    const AttributeMap &attribs);
      ~WindowSurface() override;
  };
  
  class PbufferSurface final : public Surface
  {
    public:
      PbufferSurface(rx::EGLImplFactory *implFactory,
                     const Config *config,
                     const AttributeMap &attribs);
      PbufferSurface(rx::EGLImplFactory *implFactory,
                     const Config *config,
                     EGLenum buftype,
                     EGLClientBuffer clientBuffer,
                     const AttributeMap &attribs);
      ~PbufferSurface() override;
  };
  
  class PixmapSurface final : public Surface
  {
    public:
      PixmapSurface(rx::EGLImplFactory *implFactory,
                    const Config *config,
                    NativePixmapType nativePixmap,
                    const AttributeMap &attribs);
      ~PixmapSurface() override;
  };
  
  }  // namespace egl
  
  #endif   // LIBANGLE_SURFACE_H_
  

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