# CVOpenGLBuffer An image buffer used to store image data in video memory. ## Topics ### Functions [`func CVOpenGLBufferCreate(CFAllocator?, Int, Int, CFDictionary?, UnsafeMutablePointer) -> CVReturn`](/documentation/CoreVideo/CVOpenGLBufferCreate(_:_:_:_:_:)) Creates a new Core Video OpenGL buffer that can be used for OpenGL rendering purposes [`func CVOpenGLBufferAttach(CVOpenGLBuffer, CGLContextObj, GLenum, GLint, GLint) -> CVReturn`](/documentation/CoreVideo/CVOpenGLBufferAttach(_:_:_:_:_:)) Attaches an OpenGL context to a Core Video OpenGL buffer. [`func CVOpenGLBufferGetAttributes(CVOpenGLBuffer) -> Unmanaged?`](/documentation/CoreVideo/CVOpenGLBufferGetAttributes(_:)) Obtains the attributes of a Core Video OpenGL buffer. [`func CVOpenGLBufferGetTypeID() -> CFTypeID`](/documentation/CoreVideo/CVOpenGLBufferGetTypeID()) Obtains the Core Foundation type ID for the OpenGL buffer type. [`extern CVOpenGLBufferRefCVOpenGLBufferRetain(CVOpenGLBufferRef buffer);`](/documentation/CoreVideo/CVOpenGLBufferRetain) Retains a Core Video OpenGL buffer. [`extern void CVOpenGLBufferRelease(CVOpenGLBufferRef buffer);`](/documentation/CoreVideo/CVOpenGLBufferRelease) Releases a Core Video OpenGL buffer. ### Data Types [`typealias CVOpenGLBuffer`](/documentation/CoreVideo/CVOpenGLBuffer) A reference to a Core Video OpenGL buffer object. ### Constants [`let kCVOpenGLBufferHeight: CFString`](/documentation/CoreVideo/kCVOpenGLBufferHeight) The height of the buffer. [`let kCVOpenGLBufferInternalFormat: CFString`](/documentation/CoreVideo/kCVOpenGLBufferInternalFormat) The OpenGL internal format of this buffer. [`let kCVOpenGLBufferMaximumMipmapLevel: CFString`](/documentation/CoreVideo/kCVOpenGLBufferMaximumMipmapLevel) The maximum mipmap level for this buffer. [`let kCVOpenGLBufferTarget: CFString`](/documentation/CoreVideo/kCVOpenGLBufferTarget) The OpenGL target for this buffer. [`let kCVOpenGLBufferWidth: CFString`](/documentation/CoreVideo/kCVOpenGLBufferWidth) The width of the buffer. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)