impeller::DeviceBufferGLES Class Reference

#include <device_buffer_gles.h>

Inheritance diagram for impeller::DeviceBufferGLES:

Public Types
enum	BindingType {   BindingType::kArrayBuffer,   BindingType::kElementArrayBuffer }

Public Member Functions
	DeviceBufferGLES (DeviceBufferDescriptor desc, ReactorGLES::Ref reactor, std::shared_ptr< Allocation > backing_store)
	~DeviceBufferGLES () override
const uint8_t *	GetBufferData () const
void	UpdateBufferData (const std::function< void(uint8_t *, size_t length)> &update_buffer_data)
bool	BindAndUploadDataIfNecessary (BindingType type) const
void	Flush (std::optional< Range > range=std::nullopt) const override
Public Member Functions inherited from impeller::DeviceBuffer
virtual	~DeviceBuffer ()
bool	CopyHostBuffer (const uint8_t *source, Range source_range, size_t offset=0u)
const DeviceBufferDescriptor &	GetDeviceBufferDescriptor () const
virtual void	Invalidate (std::optional< Range > range=std::nullopt) const

Additional Inherited Members
Static Public Member Functions inherited from impeller::DeviceBuffer
static BufferView	AsBufferView (std::shared_ptr< DeviceBuffer > buffer)
	Create a buffer view of this entire buffer. More...
Static Public Member Functions inherited from impeller::BackendCast< DeviceBufferGLES, DeviceBuffer >
static DeviceBufferGLES &	Cast (DeviceBuffer &base)
static const DeviceBufferGLES &	Cast (const DeviceBuffer &base)
static DeviceBufferGLES *	Cast (DeviceBuffer *base)
static const DeviceBufferGLES *	Cast (const DeviceBuffer *base)
Protected Member Functions inherited from impeller::DeviceBuffer
	DeviceBuffer (DeviceBufferDescriptor desc)
Protected Attributes inherited from impeller::DeviceBuffer
const DeviceBufferDescriptor	desc_

Detailed Description

Definition at line 18 of file device_buffer_gles.h.

Member Enumeration Documentation

BindingType

enum impeller::DeviceBufferGLES::BindingType

strong

Enumerator
kArrayBuffer
kElementArrayBuffer

Definition at line 34 of file device_buffer_gles.h.

                         {
    kArrayBuffer,
    kElementArrayBuffer,
  };

Constructor & Destructor Documentation

DeviceBufferGLES()

impeller::DeviceBufferGLES::DeviceBufferGLES	(	DeviceBufferDescriptor	desc,
		ReactorGLES::Ref	reactor,
		std::shared_ptr< Allocation >	backing_store
	)

Definition at line 15 of file device_buffer_gles.cc.

    : DeviceBuffer(desc),
      reactor_(std::move(reactor)),
      handle_(reactor_ ? reactor_->CreateHandle(HandleType::kBuffer)
                       : HandleGLES::DeadHandle()),
      backing_store_(std::move(backing_store)) {}

References impeller::kBuffer.

~DeviceBufferGLES()

impeller::DeviceBufferGLES::~DeviceBufferGLES ( )

override

Definition at line 25 of file device_buffer_gles.cc.

                                    {
  if (!handle_.IsDead()) {
    reactor_->CollectHandle(handle_);
  }
}

References impeller::HandleGLES::IsDead().

Member Function Documentation

BindAndUploadDataIfNecessary()

bool impeller::DeviceBufferGLES::BindAndUploadDataIfNecessary

(

BindingType

type

)

const

Definition at line 82 of file device_buffer_gles.cc.

                                                                          {
  if (!reactor_) {
    return false;
  }
 
  auto buffer = reactor_->GetGLHandle(handle_);
  if (!buffer.has_value()) {
    return false;
  }
 
  const auto target_type = ToTarget(type);
  const auto& gl = reactor_->GetProcTable();
 
  gl.BindBuffer(target_type, buffer.value());
  if (!initialized_) {
    gl.BufferData(target_type, backing_store_->GetLength().GetByteSize(),
                  nullptr, GL_DYNAMIC_DRAW);
    initialized_ = true;
  }
 
  if (dirty_range_.has_value()) {
    auto range = dirty_range_.value();
    gl.BufferSubData(target_type, range.offset, range.length,
                     backing_store_->GetBuffer() + range.offset);
    dirty_range_ = std::nullopt;
  }
 
  return true;
}

References impeller::ToTarget(), and type.

Flush()

void impeller::DeviceBufferGLES::Flush ( std::optional< Range >  range = std::nullopt ) const

overridevirtual

Make any pending writes visible to the GPU.

This method must be called if the device pointer provided by [OnGetContents] is written to without using [CopyHostBuffer]. On Devices with coherent host memory, this method will not perform extra work.

If the range is not provided, the entire buffer is flushed.

Reimplemented from impeller::DeviceBuffer.

Definition at line 59 of file device_buffer_gles.cc.

                                                           {
  if (!range.has_value()) {
    dirty_range_ = Range{
        0, static_cast<size_t>(backing_store_->GetLength().GetByteSize())};
  } else {
    if (dirty_range_.has_value()) {
      dirty_range_ = dirty_range_->Merge(range.value());
    } else {
      dirty_range_ = range.value();
    }
  }
}

Referenced by UpdateBufferData().

GetBufferData()

const uint8_t * impeller::DeviceBufferGLES::GetBufferData

(

)

const

Definition at line 125 of file device_buffer_gles.cc.

                                                     {
  return backing_store_->GetBuffer();
}

UpdateBufferData()

void impeller::DeviceBufferGLES::UpdateBufferData

(

const std::function< void(uint8_t *, size_t length)> &

update_buffer_data

)

Definition at line 129 of file device_buffer_gles.cc.

                            {
  if (update_buffer_data) {
    update_buffer_data(backing_store_->GetBuffer(),
                       backing_store_->GetLength().GetByteSize());
    Flush(Range{
        0, static_cast<size_t>(backing_store_->GetLength().GetByteSize())});
  }
}

References Flush().

Referenced by impeller::BlitCopyTextureToBufferCommandGLES::Encode().

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The documentation for this class was generated from the following files:

• impeller/renderer/backend/gles/device_buffer_gles.h
• impeller/renderer/backend/gles/device_buffer_gles.cc