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

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• Hash : 8f775607
  Author :
  Date : 2016-11-03T16:45:34
  

  Introduce a gl::BufferState class.
  
  This state can share vital pieces of information with the impl.
  The most elementary state is the buffer size, which then the
  impl doesn't need to replicate.
  
  BUG=angleproject:1579
  
  Change-Id: I341393c64a6e49de65c1d53b1bad2fa143209862
  Reviewed-on: https://chromium-review.googlesource.com/406644
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/Buffer.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.
  //
  
  // 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/angleutils.h"
  #include "libANGLE/Debug.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/IndexRangeCache.h"
  #include "libANGLE/RefCountObject.h"
  
  namespace rx
  {
  class BufferImpl;
  class GLImplFactory;
  };
  
  namespace gl
  {
  class Buffer;
  
  class BufferState final : angle::NonCopyable
  {
    public:
      BufferState();
      ~BufferState();
  
      const std::string &getLabel();
  
      GLenum getUsage() const { return mUsage; }
      GLbitfield getAccessFlags() const { return mAccessFlags; }
      GLenum getAccess() const { return mAccess; }
      GLboolean isMapped() const { return mMapped; }
      GLvoid *getMapPointer() const { return mMapPointer; }
      GLint64 getMapOffset() const { return mMapOffset; }
      GLint64 getMapLength() const { return mMapLength; }
      GLint64 getSize() const { return mSize; }
  
    private:
      friend class Buffer;
  
      std::string mLabel;
  
      GLenum mUsage;
      GLint64 mSize;
      GLbitfield mAccessFlags;
      GLenum mAccess;
      GLboolean mMapped;
      GLvoid *mMapPointer;
      GLint64 mMapOffset;
      GLint64 mMapLength;
  };
  
  class Buffer final : public RefCountObject, public LabeledObject
  {
    public:
      Buffer(rx::GLImplFactory *factory, GLuint id);
      ~Buffer() override;
  
      void setLabel(const std::string &label) override;
      const std::string &getLabel() const override;
  
      Error bufferData(GLenum target, const void *data, GLsizeiptr size, GLenum usage);
      Error bufferSubData(GLenum target, const void *data, GLsizeiptr size, GLintptr offset);
      Error copyBufferSubData(Buffer* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size);
      Error map(GLenum access);
      Error mapRange(GLintptr offset, GLsizeiptr length, GLbitfield access);
      Error unmap(GLboolean *result);
  
      void onTransformFeedback();
      void onPixelUnpack();
  
      Error getIndexRange(GLenum type,
                          size_t offset,
                          size_t count,
                          bool primitiveRestartEnabled,
                          IndexRange *outRange) const;
  
      GLenum getUsage() const { return mState.mUsage; }
      GLbitfield getAccessFlags() const { return mState.mAccessFlags; }
      GLenum getAccess() const { return mState.mAccess; }
      GLboolean isMapped() const { return mState.mMapped; }
      GLvoid *getMapPointer() const { return mState.mMapPointer; }
      GLint64 getMapOffset() const { return mState.mMapOffset; }
      GLint64 getMapLength() const { return mState.mMapLength; }
      GLint64 getSize() const { return mState.mSize; }
  
      rx::BufferImpl *getImplementation() const { return mImpl; }
  
    private:
      BufferState mState;
      rx::BufferImpl *mImpl;
  
      mutable IndexRangeCache mIndexRangeCache;
  };
  
  }
  
  #endif   // LIBANGLE_BUFFER_H_
  

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