XXX - Not complete yet!!!

Name

    SGIX_convolution_accuracy

Name Strings

    GL_SGIX_convolution_accuracy

Contact

    SGI

Status

    XXX - Not complete yet!!!

Version

    $Date: 1999/03/08 21:20:19 $ $Revision: 1.2 $

Number

    211

Dependencies

    EXT_convolution or ARB_imaging is required.

Overview

    This extension adds an accuracy hint for convolution.  It
    allows the program to trade off precision for speed.

New Procedures and Functions

    None

New Tokens

    Accepted by the <target> parameter of glHint and by the <pname>
    parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev:

	CONVOLUTION_HINT_SGIX		0x8316

Additions to Chapter 2 of the 1.1 Specification (OpenGL Operation)

    None

Additions to Chapter 3 of the 1.1 Specification (Rasterization)

    None

Additions to Chapter 4 of the 1.1 Specification (Fragments and the
Frame Buffer)

    None

Additions to Chapter 5 of the 1.1 Specification (Special Functions)

    Add to section 5.6 ("Hints"):

    If the <target> argument of Hint is specified as CONVOLUTION_HINT
    then the <hint> argument indicates the desired quality of pixel
    colors computed by the convolution stage of the pixel transfer
    pipeline.  Higher quality may correspond to higher-precision
    arithmetic, although an implementation may ignore the hint.  This
    hint applies to both 1D and 2D convolution.

Additions to Chapter 6 of the 1.1 Specification (State and State Requests)

    None

Additions to the GLX Specification

    None

GLX Protocol

    None

Dependencies on EXT_convolution and ARB_imaging

    If EXT_convolution or ARB_imaging is implemented, this extension
    modifies the accuracy of the convolution operation.

Errors

    None

New State

    Get Value		    Get Command     Type    Value	    Attrib
    ---------		    -----------     ----    -------	    ------
    CONVOLUTION_HINT_SGIX   GetIntegerv     Z3	    DONT_CARE	    hint

New Implementation Dependent State

    None