OpenGL Programming Guide: The Official Guide to Learning OpenGL, Version 4.3, Eighth Edition

Framebuffer Completeness

Given the myriad of combinations between texture and buffer formats, and between framebuffer attachments, various situations can arise that prevent the completion of rendering when you are using application-defined framebuffer objects. After modifying the attachments to a framebuffer object, it’s best to check the framebuffer’s status by calling glCheckFramebufferStatus().

GLenum glCheckFramebufferStatus(GLenum target);

Returns one of the framebuffer completeness status enums listed in Table 4.8. target must be one of GL_READ_FRAMEBUFFER, GL_DRAW_FRAMEBUFFER, or GL_FRAMEBUFFER (which is equivalent to GL_DRAW_FRAMEBUFFER).

Table 4.8. Errors Returned by glCheckFramebufferStatus()

If glCheckFramebufferStatus() generates ...