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glextensions - GL_ARB_texture_mirrored_repeat.wiki

Contents

  • Dependencies
  • Overview
  • New Procedures and Functions
  • New Tokens
  • Errors
  • New State
  • New Implementation Dependent State

Dependencies

This extension is written against the OpenGL 1.3 Specification.

However, this extension does not require OpenGL 1.3.

Overview

GL_ARB_texture_mirrored_repeat extends the set of texture wrap modes to include a mode (GL_MIRRORED_REPEAT_ARB) 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".

New Procedures and Functions

None

New Tokens

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_ARB | 0x8370| |:-----------------------------|:------|

Errors

None

New State

Only the type information changes for these parameters:

| Get Value | Get Command | Type | Initial Value | Description | |:--------------|:----------------|:---------|:------------------|:----------------| | TEXTURE_WRAP_S | GetTexParameteriv | n x Z5 | REPEAT | Texture Wrap Mode S| | TEXTURE_WRAP_T | GetTexParameteriv | n x Z5 | REPEAT | Texture Wrap Mode T| | TEXTURE_WRAP_R | GetTexParameteriv | n x Z5 | REPEAT | Texture Wrap Mode R|

New Implementation Dependent State

None