NAME

       glInvalidateSubFramebuffer - invalidate the content of a region of some or all of a
       framebuffer object's attachments

C SPECIFICATION

       void glInvalidateSubFramebuffer(GLenum target, GLsizei numAttachments,
                                       const GLenum * attachments, GLint x, GLint y, GLint width,
                                       GLint height);

PARAMETERS

       target
           The target to which the framebuffer is attached.  target must be GL_FRAMEBUFFER,
           GL_DRAW_FRAMEBUFFER, or GL_READ_FRAMEBUFFER.

       numAttachments
           The number of entries in the attachments array.

       attachments
           The address of an array identifying the attachments to be invalidated.

       x
           The X offset of the region to be invalidated.

       y
           The Y offset of the region to be invalidated.

       width
           The width of the region to be invalidated.

       height
           The height of the region to be invalidated.

DESCRIPTION

       glInvalidateSubFramebuffer invalidates the content of a region of a specified set of
       attachments of a framebuffer. The framebuffer whose content to invalidate is indicated by
       setting target to the target to which it is bound.  target may be GL_FRAMEBUFFER,
       GL_READ_FRAMEBUFFER or GL_DRAW_FRAMEBUFFER.  GL_FRAMEBUFFER is treated as if it were
       GL_DRAW_FRAMEBUFFER.

       A region within a subset of the framebuffer's attachments may be invalidated. This set of
       attachments are specified in an array whose address is given by attachments and which
       contains numAttachments elements. The elements of attachments must be GL_DEPTH_ATTACHMENT,
       GL_STENCIL_ATTACHMENTGL_DEPTH_STENCIL_ATTACHMENT, or GL_COLOR_ATTACHMENTi, where i is
       between zero and the value of GL_MAX_FRAMEBUFFER_ATTACHMENTS minus one. Furthermore, if
       the default framebuffer is bound to target, then attachments may contain GL_FRONT_LEFT,
       GL_FRONT_RIGHT, GL_BACK_LEFT, GL_BACK_RIGHT, GL_AUXi, GL_ACCUM, GL_COLOR, GL_DEPTH, or
       GL_STENCIL, identifying that specific buffer.  GL_COLOR, is treated as GL_BACK_LEFT for a
       double-buffered context and GL_FRONT_LEFT for a single-buffered context.

       The region of the framebuffer attachments to be invalidated is specified by x, y, width
       and height where x and y give the offset from the origin (with lower-left corner at (0,
       0)) and width and height give the size. Any pixels lying outside of the window allocated
       to the current GL context, or outside of the attachments of the currently bound
       framebuffer object, are ignored. After glInvalidateFramebuffer is executed, the contents
       of the specified region of the specified attachments become undefined.

ERRORS

       GL_INVALID_ENUM is generated if target is not one of the accepted framebuffer target
       tokens.

       GL_INVALID_ENUM is generated if any element of attachments is not one of the accepted
       framebuffer attachment tokens.

       GL_INVALID_OPERATION is generated if element of attachments is GL_COLOR_ATTACHMENTi where
       i is greater than or equal to the value of GL_MAX_COLOR_ATTACHMENTS.

ASSOCIATED GETS

       glGet() with argument GL_MAX_COLOR_ATTACHMENTS

SEE ALSO

       glInvalidateTexSubImage(), glInvalidateTexImage(), glInvalidateBufferSubData(),
       glInvalidateBufferData(), glInvalidateFramebuffer().

COPYRIGHT

       Copyright © 2012 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/.

AUTHORS

       opengl.org