| Name |
| |
| MESA_framebuffer_swap_xy |
| |
| Name Strings |
| |
| GL_MESA_framebuffer_swap_xy |
| |
| Contact |
| |
| Cici Ruan <ruanc@chromium.org> |
| |
| Contributors |
| |
| Cici Ruan, Google |
| Kristian Kristensen‎, Google |
| Fritz Koenig, Google |
| Rob Clark, Google |
| Chad Versace, Google |
| |
| Status |
| |
| Proposal |
| |
| Version |
| |
| Last Modified Date: April 8, 2020 |
| Revision: 1 |
| |
| Number |
| |
| OpenGL Extension 549 |
| OpenGL ES Extension 328 |
| |
| Dependencies |
| |
| Requires OpenGL ES 3.1 or OpenGL 4.3 for FramebufferParameteri. |
| |
| Overview |
| |
| This extension defines a new framebuffer parameter, |
| GL_FRAMEBUFFER_SWAP_XY_MESA, that changes the behavior of the reads and |
| writes to the framebuffer attachment points. When |
| GL_FRAMEBUFFER_SWAP_XY_MESA is GL_TRUE, render commands and pixel transfer |
| operations access the backing store of each attachment point with an |
| xy-swapped coordinate system. This xy-inversion is relative to the |
| coordinate system set when GL_FRAMEBUFFER_SWAP_XY_MESA is GL_FALSE. |
| |
| Access through TexSubImage2D and similar calls will notice the effect of |
| the swap when they are not attached to framebuffer objects because |
| GL_FRAMEBUFFER_SWAP_XY_MESA is associated with the framebuffer object and |
| not the attachment points. |
| |
| The application should notice the display width and height are also swapped |
| when GL_FRAMEBUFFER_SWAP_XY_MESA is GL_TRUE. |
| |
| This extension is mainly for pre-rotation and recommended to use it with |
| MESA_framebuffer_flip_x and MESA_framebuffer_flip_y to have rotated |
| result. |
| |
| 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_SWAP_XY_MESA 0x8BBD |
| |
| Interactions with OpenGL ES 3.1 and any other versions and |
| extensions that provide the entry points FramebufferParameteri |
| and GetFramebufferParameteriv |
| |
| Token GL_FRAMEBUFFER_SWAP_XY_MESA is accepted as the <pname> argument of |
| FramebufferParameteri and GetFramebufferParameteriv. |
| |
| Errors |
| |
| None |
| |
| Revision History |
| |
| Version 1, 2020/04/08 |
| - Initial draft (Cici Ruan) |
