| 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 |
| |
| 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 |
| Added OpenGL 4.3 as alternative requirement |
| |
| Version 1, June, 2018 |
| Initial draft (Fritz Koenig) |
