Class Buffers

ClassList > Buffers

RAII base class for OpenGL buffer objects (GL_ARRAY_BUFFER family). More...

• #include <Buffers.h>

Inherited by the following classes: IndexBuffer, StorageBuffer, UniformBuffer, VertexBuffer

Public Functions

Type	Name
	Buffers () = default
	Buffers (const Buffers & buf) Copy constructor. Performs a GPU-side deep copy of buf .
	Buffers (Buffers && buf) noexcept Move constructor. Transfers ownership from buf .
GLuint	GetID () const Returns the OpenGL buffer object ID.
GLuint	GetSize () const Returns the allocated buffer size in bytes.
Buffers &	operator= (const Buffers & buf) Copy assignment. Performs a GPU-side deep copy of buf .
Buffers &	operator= (Buffers && buf) noexcept Move assignment. Transfers ownership from buf .
	~Buffers () Destructor. Releases the OpenGL buffer object if valid.

Protected Attributes

Type	Name
GLuint	buf_ID = 0 OpenGL buffer object ID (0 = invalid/empty)
GLuint	buf_size = 0 Allocated buffer size in bytes.

Protected Functions

Type	Name
void	_deepCopyFrom (const Buffers & src) GPU-side deep copy from src .
void	_delBuffer () Deletes the OpenGL buffer object and resets buf_ID to 0.

Detailed Description

Encapsulates a single OpenGL buffer object ID (buf_ID) and its allocated size (buf_size). Provides correct copy and move semantics so that derived buffer classes inherit safe resource management without duplicating boilerplate.

Copy semantics (deep copy):

VertexBuffer a(data);
VertexBuffer b = a;   // new GPU buffer allocated; content copied via glCopyBufferSubData

Move semantics (ownership transfer):

VertexBuffer a(data);
VertexBuffer b = std::move(a);  // b owns the buffer; a.GetID() == 0

Note:

Thread-safety: Not thread-safe. Must be used from the OpenGL context thread.

Note:

Only GL buffer objects (glGenBuffers) are managed here. Renderbuffers and framebuffers have separate RAII wrappers.

Public Functions Documentation

function Buffers [1/3]

Buffers::Buffers () = default

---

function Buffers [2/3]

Copy constructor. Performs a GPU-side deep copy of buf .

Buffers::Buffers (
    const Buffers & buf
) 

Parameters:

• buf Source buffer.

---

function Buffers [3/3]

Move constructor. Transfers ownership from buf .

Buffers::Buffers (
    Buffers && buf
) noexcept

Parameters:

• buf Source buffer (left in the empty state, buf_ID = 0).

---

function GetID

Returns the OpenGL buffer object ID.

inline GLuint Buffers::GetID () const

Returns:

buf_ID (0 if the buffer is empty/invalid).

---

function GetSize

Returns the allocated buffer size in bytes.

inline GLuint Buffers::GetSize () const

Returns:

buf_size (0 if no data has been uploaded).

---

function operator=

Copy assignment. Performs a GPU-side deep copy of buf .

Buffers & Buffers::operator= (
    const Buffers & buf
) 

Parameters:

• buf Source buffer.

Returns:

Reference to this.

---

function operator=

Move assignment. Transfers ownership from buf .

Buffers & Buffers::operator= (
    Buffers && buf
) noexcept

Parameters:

• buf Source buffer (left in the empty state).

Returns:

Reference to this.

---

function ~Buffers

Destructor. Releases the OpenGL buffer object if valid.

Buffers::~Buffers () 

---

Protected Attributes Documentation

variable buf_ID

OpenGL buffer object ID (0 = invalid/empty)

GLuint Buffers::buf_ID;

---

variable buf_size

Allocated buffer size in bytes.

GLuint Buffers::buf_size;

---

Protected Functions Documentation

function _deepCopyFrom

GPU-side deep copy from src .

void Buffers::_deepCopyFrom (
    const Buffers & src
) 

Allocates a new buffer of the same size and copies all content using glCopyBufferSubData (GL_COPY_READ_BUFFER → GL_COPY_WRITE_BUFFER). If src is empty (buf_ID == 0 or buf_size == 0) only the metadata is copied; no GPU allocation is performed.

Parameters:

• src Source buffer to copy from.

---

function _delBuffer

Deletes the OpenGL buffer object and resets buf_ID to 0.

void Buffers::_delBuffer () 

---

---

The documentation for this class was generated from the following file src/render/Buffers.h