extensions/ANGLE_renderability_validation.txt

Name

    ANGLE_renderability_validation

Name Strings

    GL_ANGLE_renderability_validation

Contributors

    Vikas Soni, Google

Contact

    Vikas Soni, Google (vikassoni 'at' chromium.com)

Status

    Draft

Version

    Last Modified Date: April 20, 2023
    Revision: 1

Number

    OpenGL ES Extension XX

Dependencies

    None

Overview

    This extension allows skipping texture format renderability validation if
    the implementation is capable of rendering to the underlying texture
    format. This can be useful in situations where textures are created
    externally and the current context's version and extensions do not allow
    rendering to the texture but the implementation is capable.

New Procedures and Functions

    None

New Tokens

    Accepted as a value for <pname> for the TexParameter{if} and
    TexParameter{if}v commands and for the <value> parameter of
    GetTexParameter{if}v:

        GL_RENDERABILITY_VALIDATION_ANGLE     0x9EA0

Additions to the OpenGL Specification

    None.

New Behavior
    Additions to Chapter 3 of the OpenGL ES 2.0 Specification (Rasterization)

    Add a new row to Table 3.10 (Texture parameters and their values):

    Name                           | Type | Legal Values
    ------------------------------------------------------------
    RENDERABILITY_VALIDATION_ANGLE | bool | TRUE, FALSE

    Add a new section 3.7.x (Texture Usage) before section 3.7.12 and
    renumber the subsequent sections:

    "3.7.x Texture Usage

    Texture renderability validation can be controled via the
    RENDERABILITY_VALIDATION_ANGLE value for the <pname> argument to
    TexParameter{if}[v].

    Possible values for <params> when <pname> is TEXTURE_USAGE_ANGLE are:

    TRUE - the default. Renderability validation is unchanged.

    FALSE - Renderability of the texture becomes implementation dependent.
        The implementation will allow rendering to the format if it is
        capable."

Issues

Revision History

    Version 1, 2023-04-20(Vikas Soni)
      - Initial draft