OES_texture_mirrored_repeat

GL_OES_texture_mirrored_repeat

Copyright (c) 2005-2013 The Khronos Group Inc. Copyright terms at
    http://www.khronos.org/registry/speccopyright.html

Khronos-approved extension specifications are updated in response to
issues and bugs prioritized by the Khronos OpenGL ES Working Group. For
extensions which have been promoted to a core Specification, fixes will
first appear in the latest version of that core Specification, and will
eventually be backported to the extension document. This policy is
described in more detail at
    https://www.khronos.org/registry/OpenGL/docs/update_policy.php

Last modified date: May 18, 2005

OpenGL ES Extension #22

OpenGL ES 1.0 is required.

This extension is based on the ARB_texture_mirrored_repeat
extension specification.

This extension extends the set of texture wrap modes to
include a mode (GL_MIRRORED_REPEAT) that effectively uses a texture
map twice as large at the original image in which the additional half,
for each coordinate, of the new image is a mirror image of the original
image.

This new mode relaxes the need to generate images whose opposite edges
match by using the original image to generate a matching "mirror image".

Please refer to the ARB_textured_mirrored_repeat extension specification

None

Accepted by the <param> parameter of TexParameteri and TexParameterf,
and by the <params> parameter of TexParameteriv and TexParameterfv, when
their <pname> parameter is TEXTURE_WRAP_S, TEXTURE_WRAP_T, or
TEXTURE_WRAP_R:

  GL_MIRRORED_REPEAT                        0x8370

None.

Name              Type      Legal Values
==============    =======   ====================
TEXTURE_WRAP_S    integer   CLAMP, CLAMP_TO_EDGE, REPEAT,
                                            CLAMP_TO_BORDER, MIRRORED_REPEAT
TEXTURE_WRAP_T    integer   CLAMP, CLAMP_TO_EDGE, REPEAT,
                                            CLAMP_TO_BORDER, MIRRORED_REPEAT
TEXTURE_WRAP_R    integer   CLAMP, CLAMP_TO_EDGE, REPEAT,
                                             CLAMP_TO_BORDER, MIRRORED_REPEAT

If TEXTURE_WRAP_S, TEXTURE_WRAP_T, or TEXTURE_WRAP_R is set to
MIRRORED_REPEAT , the s (or t or r) coordinate is converted to:

    s - floor(s),           if floor(s) is even, or
    1 - (s - floor(s)),     if floor(s) is odd.

The converted s (or t or r) coordinate is then clamped
as described for CLAMP_TO_EDGE texture coordinate clamping.

None

None

None

None

None

None.

None

Only the type information changes for these parameters:

                                                    Initial
Get Value       Get Command     Type    Value   Description          Sec.   Attrib
---------       -----------     ----    ------- -----------          ----   ------
TEXTURE_WRAP_S  GetTexParameteriv   n x Z5 REPEAT  Texture Wrap Mode S  3.8    texture
TEXTURE_WRAP_T  GetTexParameteriv   n x Z5 REPEAT  Texture Wrap Mode T  3.8    texture
TEXTURE_WRAP_R  GetTexParameteriv   n x Z5 REPEAT  Texture Wrap Mode R  3.8    texture

None