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

• Show log

  Commit

• Hash : 32f0dd6a
  Author :
  Date : 2020-10-15T10:08:51
  

  Add Queries and Setters for resource initialization state.
  
  There are cases where we know that the next draw operation will fully
  initialize a texture/renderbuffer and we can save the robust resource
  init cost.
  
  Default all resource init state to Initialized, any redefinition will
  set it back to MayNeedInit.
  
  After setting an individual texture image to initialized, check if
  all images are now initialized and update the TextureState::mInitState
  to match. The cost of this check is only performed after initializing
  an image and allows future init checks to be faster.
  
  Bug: chromium:1132514
  Change-Id: Ia23664ae162559d1614f1eb5643e24a491d87f7f
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2475456
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  

Download

• 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"
  #include "libANGLE/angletypes.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; }
      std::string getLabel() const { return mLabel; }
  
    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;
      GLboolean mImmutable;
      GLbitfield mStorageExtUsageFlags;
  };
  
  class Buffer final : public RefCountObject<BufferID>,
                       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 bufferStorage(Context *context,
                                  BufferBinding target,
                                  GLsizeiptr size,
                                  const void *data,
                                  GLbitfield flags);
      angle::Result bufferData(Context *context,
                               BufferBinding target,
                               const void *data,
                               GLsizeiptr size,
                               BufferUsage usage);
      angle::Result bufferDataImpl(Context *context,
                                   BufferBinding target,
                                   const void *data,
                                   GLsizeiptr size,
                                   BufferUsage usage,
                                   GLbitfield flags);
      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;
      const BufferState &getState() const { return mState; }
      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;
      GLboolean isImmutable() const { return mState.mImmutable; }
      GLbitfield getStorageExtUsageFlags() const { return mState.mStorageExtUsageFlags; }
  
      // Buffers are always initialized immediately when allocated
      InitState initState() const { return InitState::Initialized; }
  
      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::Result getSubData(const gl::Context *context,
                               GLintptr offset,
                               GLsizeiptr size,
                               void *outData);
  
      // 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_
  

Download