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# docs.GL

OpenGL 4
OpenGL 3
OpenGL ES 3
OpenGL ES 2

# glBindRenderbuffer

## Name

glBindRenderbuffer — bind a named renderbuffer object

## C Specification

`void glBindRenderbuffer(` | GLenum target,
| GLuint renderbuffer`)`;

## Parameters

`target`

  Specifies the target to which the renderbuffer object is bound. The symbolic constant must be `GL_RENDERBUFFER`.

`renderbuffer`

  Specifies the name of a renderbuffer object.

## Description

A renderbuffer is a data storage object containing a single image of a renderable internal format. A renderbuffer's image may be attached to a framebuffer object to use as a destination for rendering and as a source for reading.

`glBindRenderbuffer` lets you create or use a named renderbuffer object. Calling `glBindRenderbuffer` with `target` set to `GL_RENDERBUFFER` and `renderbuffer` set to the name of the new renderbuffer object binds the renderbuffer object name. When a renderbuffer object is bound, the previous binding is automatically broken.

Renderbuffer object names are unsigned integers. The value zero is reserved, but there is no default renderbuffer object. Instead, `renderbuffer` set to zero effectively unbinds any renderbuffer object previously bound. Renderbuffer object names and the corresponding renderbuffer object contents are local to the shared object space of the current GL rendering context.

You may use glGenRenderbuffers to generate a set of new renderbuffer object names.

The state of a renderbuffer object immediately after it is first bound is a zero-sized memory buffer with format `GL_RGBA4` and zero-sized red, green, blue, alpha, depth, and stencil pixel depths.

While a non-zero renderbuffer object name is bound, GL operations on target `GL_RENDERBUFFER` affect the bound renderbuffer object, and queries of target `GL_RENDERBUFFER` return state from the bound renderbuffer object. While renderbuffer object name zero is bound, as in the initial state, attempts to modify or query state on target `GL_RENDERBUFFER` generates an `GL_INVALID_OPERATION` error.

A renderbuffer object binding created with `glBindRenderbuffer` remains active until a different renderbuffer object name is bound, or until the bound renderbuffer object is deleted with glDeleteRenderbuffers.

## Errors

`GL_INVALID_ENUM` is generated if `target` is not `GL_RENDERBUFFER`.

## Associated Gets

glGet with argument `GL_RENDERBUFFER_BINDING`

## Examples

Create a framebuffer object with a renderbuffer-based color attachment and a renderbuffer-based depth attachment.

    // fbo_width and fbo_height are the desired width and height of the FBO.
    // For Opengl <= 4.4 or if the GL_ARB_texture_non_power_of_two extension
    // is present, fbo_width and fbo_height can be values other than 2^n for
    // some integer n.

    // Build the texture that will serve as the color attachment for the framebuffer.
    GLuint color_renderbuffer;
    glGenRenderbuffers(1, &color_renderbuffer);
    glBindRenderbuffer( GL_RENDERBUFFER, (GLuint)color_renderbuffer );
    glRenderbufferStorage( GL_RENDERBUFFER, GL_RGBA8, fbo_width, fbo_height );
    glBindRenderbuffer( GL_RENDERBUFFER, 0 );

    // Build the texture that will serve as the depth attachment for the framebuffer.
    GLuint depth_renderbuffer;
    glGenRenderbuffers(1, &depth_renderbuffer);
    glBindRenderbuffer( GL_RENDERBUFFER, (GLuint)depth_renderbuffer );
    glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH_COMPONENT, fbo_width, fbo_height );
    glBindRenderbuffer( GL_RENDERBUFFER, 0 );

    // Build the framebuffer.
    GLuint framebuffer;
    glGenFramebuffers(1, &framebuffer);
    glBindFramebuffer(GL_FRAMEBUFFER, (GLuint)framebuffer);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, color_renderbuffer);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth_renderbuffer);

    GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
    if (status != GL_FRAMEBUFFER_COMPLETE)
        // Error

    glBindFramebuffer(GL_FRAMEBUFFER, 0);

## Tutorials

Songho - OpenGL Frame Buffer Object (FBO)
open.gl - Framebuffers
opengl-tutorial.org - Tutorial 14 : Render To Texture

## See Also

glDeleteRenderbuffers, glFramebufferRenderbuffer, glGenRenderbuffers, glGet, glGetRenderbufferParameteriv, glIsRenderbuffer, glRenderbufferStorage

## Copyright

Copyright © 2008 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. https://opencontent.org/openpub/.

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