WebGL EXT_texture_storage Extension Rejected Specification

Name

EXT_texture_storage

Contact

WebGL working group (public_webgl 'at' khronos.org)

Contributors

Kirill Dmitrenko (dmikis 'at' yandex-team.ru)

Members of the WebGL working group

Version

Last modified date: January 11, 2017
Revision: 2

Number

WebGL extension #k

Dependencies

Written against the WebGL API 1.0 specification.

Promoted to core and no longer available as an extension in WebGL API 2.0 specification.

Overview

This extension exposes the EXT_texture_storage functionality to WebGL.

There are no WebGL-specific behavioral changes.

Consult the above extension for documentation, issues and new functions and enumerants.

When this extension is enabled:

• The behaviour of texImage2D, compressedTexImage2D and copyTexImage2D methods of a WebGL context is changed. After a successful call to texStorage2DEXT, the value of TEXTURE_IMMUTABLE_FORMAT_EXT for this texture object is set to TRUE, and no further changes to the dimensions or format of the texture may be made. Using texImage2D, compressedTexImage2D, copyTexImage2D or texStorage2DEXT with the same texture will result in the error INVALID_OPERATION being generated.

IDL

interface EXT_texture_storage {
    const GLenum TEXTURE_IMMUTABLE_FORMAT_EXT = 0x912F;
    undefined texStorage2DEXT(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height);
}

New Functions

undefined texStorage2DEXT(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height)

Simultaneously specify storage for all levels of a two-dimensional texture.

Revision History

Revision 1, 2015/09/16

• Initial revision

Revision 2, 2017/01/11

• Moved to rejected now that initial WebGL 2.0 implementations are shipping imminently.