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

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• Hash : 9d737966
  Author :
  Date : 2019-08-14T12:25:12
  

  Standardize copyright notices to project style
  
  For all "ANGLE Project" copyrights, standardize to the format specified
  by the style guide. Changes:
  - "Copyright (c)" and "Copyright(c)" changed to just "Copyright".
  - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1").
  - Fixed a small number of files that had no copyright date using the
    initial commit year from the version control history.
  - Fixed one instance of copyright being "The ANGLE Project" rather than
    "The ANGLE Project Authors"
  
  These changes are applied both to the copyright of source file, and
  where applicable to copyright statements that are generated by
  templates.
  
  BUG=angleproject:3811
  
  Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/Buffer.h

• //
  // Copyright 2002 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.
  //
  
  // Buffer.h: Defines the gl::Buffer class, representing storage of vertex and/or
  // index data. Implements GL buffer objects and related functionality.
  // [OpenGL ES 2.0.24] section 2.9 page 21.
  
  #ifndef LIBANGLE_BUFFER_H_
  #define LIBANGLE_BUFFER_H_
  
  #include "common/PackedEnums.h"
  #include "common/angleutils.h"
  #include "libANGLE/Debug.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/IndexRangeCache.h"
  #include "libANGLE/Observer.h"
  #include "libANGLE/RefCountObject.h"
  
  namespace rx
  {
  class BufferImpl;
  class GLImplFactory;
  }  // namespace rx
  
  namespace gl
  {
  class Buffer;
  class Context;
  
  class BufferState final : angle::NonCopyable
  {
    public:
      BufferState();
      ~BufferState();
  
      BufferUsage getUsage() const { return mUsage; }
      GLbitfield getAccessFlags() const { return mAccessFlags; }
      GLenum getAccess() const { return mAccess; }
      GLboolean isMapped() const { return mMapped; }
      void *getMapPointer() const { return mMapPointer; }
      GLint64 getMapOffset() const { return mMapOffset; }
      GLint64 getMapLength() const { return mMapLength; }
      GLint64 getSize() const { return mSize; }
      bool isBoundForTransformFeedback() const { return mTransformFeedbackIndexedBindingCount != 0; }
  
    private:
      friend class Buffer;
  
      std::string mLabel;
  
      BufferUsage mUsage;
      GLint64 mSize;
      GLbitfield mAccessFlags;
      GLenum mAccess;
      GLboolean mMapped;
      void *mMapPointer;
      GLint64 mMapOffset;
      GLint64 mMapLength;
      int mBindingCount;
      int mTransformFeedbackIndexedBindingCount;
      int mTransformFeedbackGenericBindingCount;
  };
  
  class Buffer final : public RefCountObject,
                       public LabeledObject,
                       public angle::ObserverInterface,
                       public angle::Subject
  {
    public:
      Buffer(rx::GLImplFactory *factory, BufferID id);
      ~Buffer() override;
      void onDestroy(const Context *context) override;
  
      void setLabel(const Context *context, const std::string &label) override;
      const std::string &getLabel() const override;
  
      angle::Result bufferData(Context *context,
                               BufferBinding target,
                               const void *data,
                               GLsizeiptr size,
                               BufferUsage usage);
      angle::Result bufferSubData(const Context *context,
                                  BufferBinding target,
                                  const void *data,
                                  GLsizeiptr size,
                                  GLintptr offset);
      angle::Result copyBufferSubData(const Context *context,
                                      Buffer *source,
                                      GLintptr sourceOffset,
                                      GLintptr destOffset,
                                      GLsizeiptr size);
      angle::Result map(const Context *context, GLenum access);
      angle::Result mapRange(const Context *context,
                             GLintptr offset,
                             GLsizeiptr length,
                             GLbitfield access);
      angle::Result unmap(const Context *context, GLboolean *result);
  
      // These are called when another operation changes Buffer data.
      void onDataChanged();
  
      angle::Result getIndexRange(const gl::Context *context,
                                  DrawElementsType type,
                                  size_t offset,
                                  size_t count,
                                  bool primitiveRestartEnabled,
                                  IndexRange *outRange) const;
  
      BufferUsage getUsage() const { return mState.mUsage; }
      GLbitfield getAccessFlags() const { return mState.mAccessFlags; }
      GLenum getAccess() const { return mState.mAccess; }
      GLboolean isMapped() const { return mState.mMapped; }
      void *getMapPointer() const { return mState.mMapPointer; }
      GLint64 getMapOffset() const { return mState.mMapOffset; }
      GLint64 getMapLength() const { return mState.mMapLength; }
      GLint64 getSize() const { return mState.mSize; }
      GLint64 getMemorySize() const;
  
      rx::BufferImpl *getImplementation() const { return mImpl; }
  
      ANGLE_INLINE bool isBound() const { return mState.mBindingCount > 0; }
  
      ANGLE_INLINE bool isBoundForTransformFeedbackAndOtherUse() const
      {
          // The transform feedback generic binding point is not an indexed binding point but it also
          // does not count as a non-transform-feedback use of the buffer, so we subtract it from the
          // binding count when checking if the buffer is bound to a non-transform-feedback location.
          // See https://crbug.com/853978
          return mState.mTransformFeedbackIndexedBindingCount > 0 &&
                 mState.mTransformFeedbackIndexedBindingCount !=
                     mState.mBindingCount - mState.mTransformFeedbackGenericBindingCount;
      }
  
      bool isDoubleBoundForTransformFeedback() const;
      void onTFBindingChanged(const Context *context, bool bound, bool indexed);
      void onNonTFBindingChanged(int incr) { mState.mBindingCount += incr; }
  
      // angle::ObserverInterface implementation.
      void onSubjectStateChange(angle::SubjectIndex index, angle::SubjectMessage message) override;
  
    private:
      BufferState mState;
      rx::BufferImpl *mImpl;
      angle::ObserverBinding mImplObserver;
  
      mutable IndexRangeCache mIndexRangeCache;
  };
  
  }  // namespace gl
  
  #endif  // LIBANGLE_BUFFER_H_
  

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