2010 Khronos Group
glCheckFramebufferStatus 3G
glCheckFramebufferStatus check the completeness status of a framebuffer

## C Specification

GLenum `glCheckFramebufferStatus` GLenum target

## Parameters

target

  Specify the target of the framebuffer completeness check.

## Description

`glCheckFramebufferStatus` queries the completeness status of the framebuffer object currently bound to target. target must be `GL_DRAW_FRAMEBUFFER`, `GL_READ_FRAMEBUFFER` or `GL_FRAMEBUFFER`. `GL_FRAMEBUFFER` is equivalent to `GL_DRAW_FRAMEBUFFER`.

The return value is `GL_FRAMEBUFFER_COMPLETE` if the framebuffer bound to target is complete. Otherwise, the return value is determined as follows:

- `GL_FRAMEBUFFER_UNDEFINED` is returned if target is the default framebuffer, but the default framebuffer does not exist.

- `GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT` is returned if any of the framebuffer attachment points are framebuffer incomplete.

- `GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT` is returned if the framebuffer does not have at least one image attached to it.

- `GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER` is returned if the value of `GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE` is `GL_NONE` for any color attachment point(s) named by `GL_DRAW_BUFFERi`.

- `GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER` is returned if `GL_READ_BUFFER` is not `GL_NONE` and the value of `GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE` is `GL_NONE` for the color attachment point named by `GL_READ_BUFFER`.

- `GL_FRAMEBUFFER_UNSUPPORTED` is returned if the combination of internal formats of the attached images violates an implementation-dependent set of restrictions.

- `GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE` is returned if the value of `GL_RENDERBUFFER_SAMPLES` is not the same for all attached renderbuffers; if the value of `GL_TEXTURE_SAMPLES` is the not same for all attached textures; or, if the attached images are a mix of renderbuffers and textures, the value of `GL_RENDERBUFFER_SAMPLES` does not match the value of `GL_TEXTURE_SAMPLES`.

- `GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE` is also returned if the value of `GL_TEXTURE_FIXED_SAMPLE_LOCATIONS` is not the same for all attached textures; or, if the attached images are a mix of renderbuffers and textures, the value of `GL_TEXTURE_FIXED_SAMPLE_LOCATIONS` is not `GL_TRUE` for all attached textures.

- `GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS` is returned if any framebuffer attachment is layered, and any populated attachment is not layered, or if all populated color attachments are not from textures of the same target.

Additionally, if an error occurs, zero is returned.

## Errors

`GL_INVALID_ENUM` is generated if target is not `GL_DRAW_FRAMEBUFFER`, `GL_READ_FRAMEBUFFER` or `GL_FRAMEBUFFER`.

## See Also

glGenFramebuffers, glDeleteFramebuffers glBindFramebuffer

## Copyright

Copyright 2010 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. http://opencontent.org/openpub/.