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     OpenGL Extension #540
  31     OpenGL ES Extension #302
  32
  33 Dependencies
  34
  35     OpenGL ES 3.1 or OpenGL 4.3 is required, for FramebufferParameteri.
  36
  37 Overview
  38
  39     This extension defines a new framebuffer parameter,
  40     GL_FRAMEBUFFER_FLIP_Y_MESA, that changes the behavior of the reads and
  41     writes to the framebuffer attachment points. When GL_FRAMEBUFFER_FLIP_Y_MESA
  42     is GL_TRUE, render commands and pixel transfer operations access the
  43     backing store of each attachment point with an y-inverted coordinate
  44     system. This y-inversion is relative to the coordinate system set when
  45     GL_FRAMEBUFFER_FLIP_Y_MESA is GL_FALSE.
  46
  47     Access through TexSubImage2D and similar calls will notice the effect of
  48     the flip when they are not attached to framebuffer objects because
  49     GL_FRAMEBUFFER_FLIP_Y_MESA is associated with the framebuffer object and
  50     not the attachment points.
  51
  52 IP Status
  53
  54     None
  55
  56 Issues
  57
  58     None
  59
  60 New Procedures and Functions
  61
  62     None
  63
  64 New Types
  65
  66     None
  67
  68 New Tokens
  69
  70     Accepted by the <pname> argument of FramebufferParameteri and
  71     GetFramebufferParameteriv:
  72
  73         GL_FRAMEBUFFER_FLIP_Y_MESA                      0x8BBB
  74
  75 Errors
  76
  77     An INVALID_OPERATION error is generated by GetFramebufferParameteriv if the
  78     default framebuffer is bound to <target> and <pname> is FRAMEBUFFER_FLIP_Y_MESA.
  79
  80
  81
  82 Revision History
  83
  84     Version 2, June, 2019
  85         Enable extension for OpenGL 4.3 and beyond
  86
  87     Version 1, June, 2018
  88         Initial draft (Fritz Koenig)