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📄 WebGLExtensions.js

📊 Analysis Summary

Metric	Count
🔧 Functions	8
📦 Imports	1
📊 Variables & Constants	2

📚 Table of Contents

• Imports
• Variables & Constants
• Functions

🛠️ File Location:

📂 src/renderers/webgl/WebGLExtensions.js

📦 Imports

Name	Source
warnOnce	../../utils.js

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Variables & Constants

Name	Type	Kind	Value	Exported
extensions	{}	let/var	{}	✗
extension	any	let/var	*not shown*	✗

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Functions

WebGLExtensions(gl: any): { has: (name: any) => boolean; init: () => void; get: (name: any) => any; }

Parameters:

• gl any

Returns: { has: (name: any) => boolean; init: () => void; get: (name: any) => any; }

Calls:

• gl.getExtension
• getExtension
• warnOnce (from ../../utils.js)

Code

function WebGLExtensions( gl ) {

    const extensions = {};

    function getExtension( name ) {

        if ( extensions[ name ] !== undefined ) {

            return extensions[ name ];

        }

        let extension;

        switch ( name ) {

            case 'WEBGL_depth_texture':
                extension = gl.getExtension( 'WEBGL_depth_texture' ) || gl.getExtension( 'MOZ_WEBGL_depth_texture' ) || gl.getExtension( 'WEBKIT_WEBGL_depth_texture' );
                break;

            case 'EXT_texture_filter_anisotropic':
                extension = gl.getExtension( 'EXT_texture_filter_anisotropic' ) || gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) || gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );
                break;

            case 'WEBGL_compressed_texture_s3tc':
                extension = gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );
                break;

            case 'WEBGL_compressed_texture_pvrtc':
                extension = gl.getExtension( 'WEBGL_compressed_texture_pvrtc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );
                break;

            default:
                extension = gl.getExtension( name );

        }

        extensions[ name ] = extension;

        return extension;

    }

    return {

        has: function ( name ) {

            return getExtension( name ) !== null;

        },

        init: function () {

            getExtension( 'EXT_color_buffer_float' );
            getExtension( 'WEBGL_clip_cull_distance' );
            getExtension( 'OES_texture_float_linear' );
            getExtension( 'EXT_color_buffer_half_float' );
            getExtension( 'WEBGL_multisampled_render_to_texture' );
            getExtension( 'WEBGL_render_shared_exponent' );

        },

        get: function ( name ) {

            const extension = getExtension( name );

            if ( extension === null ) {

                warnOnce( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );

            }

            return extension;

        }

    };

}

getExtension(name: any): any

Parameters:

• name any

Returns: any

Calls:

• gl.getExtension

Code

function getExtension( name ) {

        if ( extensions[ name ] !== undefined ) {

            return extensions[ name ];

        }

        let extension;

        switch ( name ) {

            case 'WEBGL_depth_texture':
                extension = gl.getExtension( 'WEBGL_depth_texture' ) || gl.getExtension( 'MOZ_WEBGL_depth_texture' ) || gl.getExtension( 'WEBKIT_WEBGL_depth_texture' );
                break;

            case 'EXT_texture_filter_anisotropic':
                extension = gl.getExtension( 'EXT_texture_filter_anisotropic' ) || gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) || gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );
                break;

            case 'WEBGL_compressed_texture_s3tc':
                extension = gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );
                break;

            case 'WEBGL_compressed_texture_pvrtc':
                extension = gl.getExtension( 'WEBGL_compressed_texture_pvrtc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );
                break;

            default:
                extension = gl.getExtension( name );

        }

        extensions[ name ] = extension;

        return extension;

    }

has(name: any): boolean

Parameters:

• name any

Returns: boolean

Calls:

• getExtension

Code

function ( name ) {

            return getExtension( name ) !== null;

        }

init(): void

Returns: void

Calls:

• getExtension

Code

function () {

            getExtension( 'EXT_color_buffer_float' );
            getExtension( 'WEBGL_clip_cull_distance' );
            getExtension( 'OES_texture_float_linear' );
            getExtension( 'EXT_color_buffer_half_float' );
            getExtension( 'WEBGL_multisampled_render_to_texture' );
            getExtension( 'WEBGL_render_shared_exponent' );

        }

get(name: any): any

Parameters:

• name any

Returns: any

Calls:

• getExtension
• warnOnce (from ../../utils.js)

Code

function ( name ) {

            const extension = getExtension( name );

            if ( extension === null ) {

                warnOnce( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );

            }

            return extension;

        }

has(name: any): boolean

Parameters:

• name any

Returns: boolean

Calls:

• getExtension

Code

function ( name ) {

            return getExtension( name ) !== null;

        }

init(): void

Returns: void

Calls:

• getExtension

Code

function () {

            getExtension( 'EXT_color_buffer_float' );
            getExtension( 'WEBGL_clip_cull_distance' );
            getExtension( 'OES_texture_float_linear' );
            getExtension( 'EXT_color_buffer_half_float' );
            getExtension( 'WEBGL_multisampled_render_to_texture' );
            getExtension( 'WEBGL_render_shared_exponent' );

        }

get(name: any): any

Parameters:

• name any

Returns: any

Calls:

• getExtension
• warnOnce (from ../../utils.js)

Code

function ( name ) {

            const extension = getExtension( name );

            if ( extension === null ) {

                warnOnce( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );

            }

            return extension;

        }

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