Contents

• Dependencies
• Overview
• New Tokens
• Errors
• New State
• New Implementation Dependent State

Dependencies

GL_EXT_texture3D

Overview

ATI_texture_mirror_once extends the set of texture wrap modes to include two modes (GL_MIRROR_CLAMP_ATI, GL_MIRROR_CLAMP_TO_EDGE_ATI) that effectively use a texture map twice as large as the original image in which the additional half 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". This mode allows the texture to be mirrored only once in the negative s, t, and r directions.

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_EXT:

|MIRROR_CLAMP_ATI | 0x8742| |:------------------------------|:-------------| |MIRROR_CLAMP_TO_EDGE_ATI | 0x8743 |

Errors

None

New State

Only the type information changes for these parameters:

| Get Value | Get Command | Type | Initial Value | |:--------------|:----------------|:---------|:------------------| |TEXTURE_WRAP_S | GetTexParameteriv | n x Z5 | REPEAT | |TEXTURE_WRAP_T | GetTexParameteriv | n x Z5 | REPEAT | |TEXTURE_WRAP_R_EXT | GetTexParameteriv | n x Z5 | REPEAT |

New Implementation Dependent State

None