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Name
MESA_framebuffer_flip_y
Name Strings
GL_MESA_framebuffer_flip_y
Contact
Fritz Koenig <frkoenig@google.com>
Contributors
Fritz Koenig, Google
Kristian Høgsberg, Google
Chad Versace, Google
Heinrich Fink, DAQRI
Status
Proposal
Version
Version 2, June 4, 2019
Number
OpenGL Extension #540
OpenGL ES Extension #302
Dependencies
OpenGL ES 3.1 or OpenGL 4.3 is required, for FramebufferParameteri.
Overview
This extension defines a new framebuffer parameter,
GL_FRAMEBUFFER_FLIP_Y_MESA, that changes the behavior of the reads and
writes to the framebuffer attachment points. When GL_FRAMEBUFFER_FLIP_Y_MESA
is GL_TRUE, render commands and pixel transfer operations access the
backing store of each attachment point with an y-inverted coordinate
system. This y-inversion is relative to the coordinate system set when
GL_FRAMEBUFFER_FLIP_Y_MESA is GL_FALSE.
Access through TexSubImage2D and similar calls will notice the effect of
the flip when they are not attached to framebuffer objects because
GL_FRAMEBUFFER_FLIP_Y_MESA is associated with the framebuffer object and
not the attachment points.
IP Status
None
Issues
None
New Procedures and Functions
None
New Types
None
New Tokens
Accepted by the <pname> argument of FramebufferParameteri and
GetFramebufferParameteriv:
GL_FRAMEBUFFER_FLIP_Y_MESA 0x8BBB
Errors
An INVALID_OPERATION error is generated by GetFramebufferParameteriv if the
default framebuffer is bound to <target> and <pname> is FRAMEBUFFER_FLIP_Y_MESA.
Revision History
Version 2, June, 2019
Enable extension for OpenGL 4.3 and beyond
Version 1, June, 2018
Initial draft (Fritz Koenig)
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