th.getReversed(); }; } function WebGLUtils( gl, extensions ) { function convert( p, colorSpace = NoColorSpace ) { let extension; const transfer = ColorManagement.getTransfer( colorSpace ); 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 === UnsignedInt5999Type ) return gl.UNSIGNED_INT_5_9_9_9_REV; if ( p === UnsignedInt101111Type ) return gl.UNSIGNED_INT_10F_11F_11F_REV; 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 ) return gl.HALF_FLOAT; if ( p === AlphaFormat ) return gl.ALPHA; if ( p === RGBFormat ) return gl.RGB; if ( p === RGBAFormat ) return gl.RGBA; if ( p === DepthFormat ) return gl.DEPTH_COMPONENT; if ( p === DepthStencilFormat ) return gl.DEPTH_STENCIL; // WebGL2 formats. if ( p === RedFormat ) return gl.RED; 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 ( transfer === SRGBTransfer ) { 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; } } // ETC if ( p === RGB_ETC1_Format || p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format || p === R11_EAC_Format || p === SIGNED_R11_EAC_Format || p === RG11_EAC_Format || p === SIGNED_RG11_EAC_Format ) { extension = extensions.get( 'WEBGL_compressed_texture_etc' ); if ( extension !== null ) { if ( p === RGB_ETC1_Format || p === RGB_ETC2_Format ) return ( transfer === SRGBTransfer ) ? extension.COMPRESSED_SRGB8_ETC2 : extension.COMPRESSED_RGB8_ETC2; if ( p === RGBA_ETC2_EAC_Format ) return ( transfer === SRGBTransfer ) ? extension.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC : extension.COMPRESSED_RGBA8_ETC2_EAC; if ( p === R11_EAC_Format ) return extension.COMPRESSED_R11_EAC; if ( p === SIGNED_R11_EAC_Format ) return extension.COMPRESSED_SIGNED_R11_EAC; if ( p === RG11_EAC_Format ) return extension.COMPRESSED_RG11_EAC; if ( p === SIGNED_RG11_EAC_Format ) return extension.COMPRESSED_SIGNED_RG11_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 ( transfer === SRGBTransfer ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR : extension.COMPRESSED_RGBA_ASTC_4x4_