text: import { RGBA_ASTC_4x4_Format, RGBA_ASTC_5x4_Format, RGBA_ASTC_5x5_Format, RGBA_ASTC_6x5_Format, RGBA_ASTC_6x6_Format, RGBA_ASTC_8x5_Format, RGBA_ASTC_8x6_Format, RGBA_ASTC_8x8_Format, RGBA_ASTC_10x5_Format, RGBA_ASTC_10x6_Format, RGBA_ASTC_10x8_Format, RGBA_ASTC_10x10_Format, RGBA_ASTC_12x10_Format, RGBA_ASTC_12x12_Format, RGB_ETC1_Format, RGB_ETC2_Format, RGBA_ETC2_EAC_Format, RGBA_PVRTC_2BPPV1_Format, RGBA_PVRTC_4BPPV1_Format, RGB_PVRTC_2BPPV1_Format, RGB_PVRTC_4BPPV1_Format, RGBA_S3TC_DXT5_Format, RGBA_S3TC_DXT3_Format, RGBA_S3TC_DXT1_Format, RGB_S3TC_DXT1_Format, DepthFormat, DepthStencilFormat, LuminanceAlphaFormat, LuminanceFormat, RedFormat, RGBFormat, RGBAFormat, AlphaFormat, RedIntegerFormat, RGFormat, RGIntegerFormat, RGBAIntegerFormat, HalfFloatType, FloatType, UnsignedIntType, IntType, UnsignedShortType, ShortType, ByteType, UnsignedInt248Type, UnsignedShort5551Type, UnsignedShort4444Type, UnsignedByteType, RGBA_BPTC_Format, sRGBEncoding, _SRGBAFormat } from '../../constants.js';
  
  function WebGLUtils( gl, extensions, capabilities ) {
  
  	const isWebGL2 = capabilities.isWebGL2;
  
  	function convert( p, encoding = null ) {
  
  		let extension;
  
  		if ( p === UnsignedByteType ) return gl.UNSIGNED_BYTE;
  		if ( p === UnsignedShort4444Type ) return gl.UNSIGNED_SHORT_4_4_4_4;
  		if ( p === UnsignedShort5551Type ) return gl.UNSIGNED_SHORT_5_5_5_1;
  
  		if ( p === ByteType ) return gl.BYTE;
  		if ( p === ShortType ) return gl.SHORT;
  		if ( p === UnsignedShortType ) return gl.UNSIGNED_SHORT;
  		if ( p === IntType ) return gl.INT;
  		if ( p === UnsignedIntType ) return gl.UNSIGNED_INT;
  		if ( p === FloatType ) return gl.FLOAT;
  
  		if ( p === HalfFloatType ) {
  
  			if ( isWebGL2 ) return gl.HALF_FLOAT;
  
  			extension = extensions.get( 'OES_texture_half_float' );
  
  			if ( extension !== null ) {
  
  				return extension.HALF_FLOAT_OES;
  
  			} else {
  
  				return null;
  
  			}
  
  		}
  
  		if ( p === AlphaFormat ) return gl.ALPHA;
  		if ( p === RGBAFormat ) return gl.RGBA;
  		if ( p === LuminanceFormat ) return gl.LUMINANCE;
  		if ( p === LuminanceAlphaFormat ) return gl.LUMINANCE_ALPHA;
  		if ( p === DepthFormat ) return gl.DEPTH_COMPONENT;
  		if ( p === DepthStencilFormat ) return gl.DEPTH_STENCIL;
  		if ( p === RedFormat ) return gl.RED;
  
  		if ( p === RGBFormat ) {
  
  			console.warn( 'THREE.WebGLRenderer: THREE.RGBFormat has been removed. Use THREE.RGBAFormat instead. https://github.com/mrdoob/three.js/pull/23228' );
  			return gl.RGBA;
  
  		}
  
  		// WebGL 1 sRGB fallback
  
  		if ( p === _SRGBAFormat ) {
  
  			extension = extensions.get( 'EXT_sRGB' );
  
  			if ( extension !== null ) {
  
  				return extension.SRGB_ALPHA_EXT;
  
  			} else {
  
  				return null;
  
  			}
  
  		}
  
  		// WebGL2 formats.
  
  		if ( p === RedIntegerFormat ) return gl.RED_INTEGER;
  		if ( p === RGFormat ) return gl.RG;
  		if ( p === RGIntegerFormat ) return gl.RG_INTEGER;
  		if ( p === RGBAIntegerFormat ) return gl.RGBA_INTEGER;
  
  		// S3TC
  
  		if ( p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format || p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format ) {
  
  			if ( encoding === sRGBEncoding ) {
  
  				extension = extensions.get( 'WEBGL_compressed_texture_s3tc_srgb' );
  
  				if ( extension !== null ) {
  
  					if ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_SRGB_S3TC_DXT1_EXT;
  					if ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT;
  					if ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT;
  					if ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT;
  
  				} else {
  
  					return null;
  
  				}
  
  			} else {
  
  				extension = extensions.get( 'WEBGL_compressed_texture_s3tc' );
  
  				if ( extension !== null ) {
  
  					if ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
  					if ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
  					if ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
  					if ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;
  
  				} else {
  
  					return null;
  
  				}
  
  			}
  
  		}
  
  		// PVRTC
  
  		if ( p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format || p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format ) {
  
  			extension = extensions.get( 'WEBGL_compressed_texture_pvrtc' );
  
  			if ( extension !== null ) {
  
  				if ( p === RGB_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
  				if ( p === RGB_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
  				if ( p === RGBA_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
  				if ( p === RGBA_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
  
  			} else {
  
  				return null;
  
  			}
  
  		}
  
  		// ETC1
  
  		if ( p === RGB_ETC1_Format ) {
  
  			extension = extensions.get( 'WEBGL_compressed_texture_etc1' );
  
  			if ( extension !== null ) {
  
  				return extension.COMPRESSED_RGB_ETC1_WEBGL;
  
  			} else {
  
  				return null;
  
  			}
  
  		}
  
  		// ETC2
  
  		if ( p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format ) {
  
  			extension = extensions.get( 'WEBGL_compressed_texture_etc' );
  
  			if ( extension !== null ) {
  
  				if ( p === RGB_ETC2_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ETC2 : extension.COMPRESSED_RGB8_ETC2;
  				if ( p === RGBA_ETC2_EAC_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC : extension.COMPRESSED_RGBA8_ETC2_EAC;
  
  			} else {
  
  				return null;
  
  			}
  
  		}
  
  		// ASTC
  
  		if ( p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format ||
  			p === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format ||
  			p === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format ||
  			p === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format ||
  			p === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format ) {
  
  			extension = extensions.get( 'WEBGL_compressed_texture_astc' );
  
  			if ( extension !== null ) {
  
  				if ( p === RGBA_ASTC_4x4_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR : extension.COMPRESSED_RGBA_ASTC_4x4_KHR;
  				if ( p === RGBA_ASTC_5x4_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR : extension.COMPRESSED_RGBA_ASTC_5x4_KHR;
  				if ( p === RGBA_ASTC_5x5_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR : extension.COMPRESSED_RGBA_ASTC_5x5_KHR;
  				if ( p === RGBA_ASTC_6x5_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR : extension.COMPRESSED_RGBA_ASTC_6x5_KHR;
  				if ( p === RGBA_ASTC_6x6_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR : extension.COMPRESSED_RGBA_ASTC_6x6_KHR;
  				if ( p === RGBA_ASTC_8x5_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR : extension.COMPRESSED_RGBA_ASTC_8x5_KHR;
  				if ( p === RGBA_ASTC_8x6_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR : extension.COMPRESSED_RGBA_ASTC_8x6_KHR;
  				if ( p === RGBA_ASTC_8x8_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR : extension.COMPRESSED_RGBA_ASTC_8x8_KHR;
  				if ( p === RGBA_ASTC_10x5_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR : extension.COMPRESSED_RGBA_ASTC_10x5_KHR;
  				if ( p === RGBA_ASTC_10x6_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR : extension.COMPRESSED_RGBA_ASTC_10x6_KHR;
  				if ( p === RGBA_ASTC_10x8_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR : extension.COMPRESSED_RGBA_ASTC_10x8_KHR;
  				if ( p === RGBA_ASTC_10x10_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR : extension.COMPRESSED_RGBA_ASTC_10x10_KHR;
  				if ( p === RGBA_ASTC_12x10_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR : extension.COMPRESSED_RGBA_ASTC_12x10_KHR;
  				if ( p === RGBA_ASTC_12x12_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR : extension.COMPRESSED_RGBA_ASTC_12x12_KHR;
  
  			} else {
  
  				return null;
  
  			}
  
  		}
  
  		// BPTC
  
  		if ( p === RGBA_BPTC_Format ) {
  
  			extension = extensions.get( 'EXT_texture_compression_bptc' );
  
  			if ( extension !== null ) {
  
  				if ( p === RGBA_BPTC_Format ) return ( encoding === sRGBEncoding ) ? extension.COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT : extension.COMPRESSED_RGBA_BPTC_UNORM_EXT;
  
  			} else {
  
  				return null;
  
  			}
  
  		}
  
  		//
  
  		if ( p === UnsignedInt248Type ) {
  
  			if ( isWebGL2 ) return gl.UNSIGNED_INT_24_8;
  
  			extension = extensions.get( 'WEBGL_depth_texture' );
  
  			if ( extension !== null ) {
  
  				return extension.UNSIGNED_INT_24_8_WEBGL;
  
  			} else {
  
  				return null;
  
  			}
  
  		}
  
  		// if "p" can't be resolved, assume the user defines a WebGL constant as a string (fallback/workaround for packed RGB formats)
  
  		return ( gl[ p ] !== undefined ) ? gl[ p ] : null;
  
  	}
  
  	return { convert: convert };
  
  }
  
  
  export { WebGLUtils };
  