docs/specs/MESA_framebuffer_flip_y.txt

   1 Name
   2
   3     MESA_framebuffer_flip_y
   4
   5 Name Strings
   6
   7     GL_MESA_framebuffer_flip_y
   8
   9 Contact
  10
  11     Fritz Koenig <frkoenig@google.com>
  12
  13 Contributors
  14
  15     Fritz Koenig, Google
  16     Kristian Høgsberg, Google
  17     Chad Versace, Google
  18     Heinrich Fink, DAQRI
  19
  20 Status
  21
  22     Proposal
  23
  24 Version
  25
  26     Version 2, June 4, 2019
  27
  28 Number
  29
  30     302
  31
  32 Dependencies
  33
  34     OpenGL ES 3.1 or OpenGL 4.3 is required, for FramebufferParameteri.
  35
  36 Overview
  37
  38     This extension defines a new framebuffer parameter,
  39     GL_FRAMEBUFFER_FLIP_Y_MESA, that changes the behavior of the reads and
  40     writes to the framebuffer attachment points. When GL_FRAMEBUFFER_FLIP_Y_MESA
  41     is GL_TRUE, render commands and pixel transfer operations access the
  42     backing store of each attachment point with an y-inverted coordinate
  43     system. This y-inversion is relative to the coordinate system set when
  44     GL_FRAMEBUFFER_FLIP_Y_MESA is GL_FALSE.
  45
  46     Access through TexSubImage2D and similar calls will notice the effect of
  47     the flip when they are not attached to framebuffer objects because
  48     GL_FRAMEBUFFER_FLIP_Y_MESA is associated with the framebuffer object and
  49     not the attachment points.
  50
  51 IP Status
  52
  53     None
  54
  55 Issues
  56
  57     None
  58
  59 New Procedures and Functions
  60
  61     None
  62
  63 New Types
  64
  65     None
  66
  67 New Tokens
  68
  69     Accepted by the <pname> argument of FramebufferParameteri and
  70     GetFramebufferParameteriv:
  71
  72         GL_FRAMEBUFFER_FLIP_Y_MESA                      0x8BBB
  73
  74 Errors
  75
  76     An INVALID_OPERATION error is generated by GetFramebufferParameteriv if the
  77     default framebuffer is bound to <target> and <pname> is FRAMEBUFFER_FLIP_Y_MESA.
  78
  79 Revision History
  80
  81     Version 2, June, 2019
  82         Added OpenGL 4.3 as alternative requirement
  83
  84     Version 1, June, 2018
  85         Initial draft (Fritz Koenig)