Buckets:
| 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, RedFormat, RGBFormat, RGBAFormat, AlphaFormat, RedIntegerFormat, RGFormat, RGIntegerFormat, RGBAIntegerFormat, HalfFloatType, FloatType, UnsignedIntType, IntType, UnsignedShortType, ShortType, ByteType, UnsignedInt248Type, UnsignedInt5999Type, UnsignedShort5551Type, UnsignedShort4444Type, UnsignedByteType, RGBA_BPTC_Format, RED_RGTC1_Format, SIGNED_RED_RGTC1_Format, RED_GREEN_RGTC2_Format, SIGNED_RED_GREEN_RGTC2_Format, SRGBColorSpace, NoColorSpace } from '../../../constants.js'; | |
| /** | |
| * A WebGL 2 backend utility module with common helpers. | |
| * | |
| * @private | |
| */ | |
| class WebGLUtils { | |
| /** | |
| * Constructs a new utility object. | |
| * | |
| * @param {WebGLBackend} backend - The WebGL 2 backend. | |
| */ | |
| constructor( backend ) { | |
| /** | |
| * A reference to the WebGL 2 backend. | |
| * | |
| * @type {WebGLBackend} | |
| */ | |
| this.backend = backend; | |
| /** | |
| * A reference to the rendering context. | |
| * | |
| * @type {WebGL2RenderingContext} | |
| */ | |
| this.gl = this.backend.gl; | |
| /** | |
| * A reference to a backend module holding extension-related | |
| * utility functions. | |
| * | |
| * @type {WebGLExtensions} | |
| */ | |
| this.extensions = backend.extensions; | |
| } | |
| /** | |
| * Converts the given three.js constant into a WebGL constant. | |
| * The method currently supports the conversion of texture formats | |
| * and types. | |
| * | |
| * @param {number} p - The three.js constant. | |
| * @param {string} [colorSpace=NoColorSpace] - The color space. | |
| * @return {?number} The corresponding WebGL constant. | |
| */ | |
| convert( p, colorSpace = NoColorSpace ) { | |
| const { gl, extensions } = this; | |
| 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 === UnsignedInt5999Type ) return gl.UNSIGNED_INT_5_9_9_9_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 ( colorSpace === SRGBColorSpace ) { | |
| 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 ) { | |
| extension = extensions.get( 'WEBGL_compressed_texture_etc' ); | |
| if ( extension !== null ) { | |
| if ( p === RGB_ETC1_Format || p === RGB_ETC2_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ETC2 : extension.COMPRESSED_RGB8_ETC2; | |
| if ( p === RGBA_ETC2_EAC_Format ) return ( colorSpace === SRGBColorSpace ) ? 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 ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR : extension.COMPRESSED_RGBA_ASTC_4x4_KHR; | |
| if ( p === RGBA_ASTC_5x4_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR : extension.COMPRESSED_RGBA_ASTC_5x4_KHR; | |
| if ( p === RGBA_ASTC_5x5_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR : extension.COMPRESSED_RGBA_ASTC_5x5_KHR; | |
| if ( p === RGBA_ASTC_6x5_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR : extension.COMPRESSED_RGBA_ASTC_6x5_KHR; | |
| if ( p === RGBA_ASTC_6x6_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR : extension.COMPRESSED_RGBA_ASTC_6x6_KHR; | |
| if ( p === RGBA_ASTC_8x5_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR : extension.COMPRESSED_RGBA_ASTC_8x5_KHR; | |
| if ( p === RGBA_ASTC_8x6_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR : extension.COMPRESSED_RGBA_ASTC_8x6_KHR; | |
| if ( p === RGBA_ASTC_8x8_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR : extension.COMPRESSED_RGBA_ASTC_8x8_KHR; | |
| if ( p === RGBA_ASTC_10x5_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR : extension.COMPRESSED_RGBA_ASTC_10x5_KHR; | |
| if ( p === RGBA_ASTC_10x6_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR : extension.COMPRESSED_RGBA_ASTC_10x6_KHR; | |
| if ( p === RGBA_ASTC_10x8_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR : extension.COMPRESSED_RGBA_ASTC_10x8_KHR; | |
| if ( p === RGBA_ASTC_10x10_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR : extension.COMPRESSED_RGBA_ASTC_10x10_KHR; | |
| if ( p === RGBA_ASTC_12x10_Format ) return ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR : extension.COMPRESSED_RGBA_ASTC_12x10_KHR; | |
| if ( p === RGBA_ASTC_12x12_Format ) return ( colorSpace === SRGBColorSpace ) ? 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 ( colorSpace === SRGBColorSpace ) ? extension.COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT : extension.COMPRESSED_RGBA_BPTC_UNORM_EXT; | |
| } else { | |
| return null; | |
| } | |
| } | |
| // RGTC | |
| if ( p === RED_RGTC1_Format || p === SIGNED_RED_RGTC1_Format || p === RED_GREEN_RGTC2_Format || p === SIGNED_RED_GREEN_RGTC2_Format ) { | |
| extension = extensions.get( 'EXT_texture_compression_rgtc' ); | |
| if ( extension !== null ) { | |
| if ( p === RGBA_BPTC_Format ) return extension.COMPRESSED_RED_RGTC1_EXT; | |
| if ( p === SIGNED_RED_RGTC1_Format ) return extension.COMPRESSED_SIGNED_RED_RGTC1_EXT; | |
| if ( p === RED_GREEN_RGTC2_Format ) return extension.COMPRESSED_RED_GREEN_RGTC2_EXT; | |
| if ( p === SIGNED_RED_GREEN_RGTC2_Format ) return extension.COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT; | |
| } else { | |
| return null; | |
| } | |
| } | |
| // | |
| if ( p === UnsignedInt248Type ) { | |
| return gl.UNSIGNED_INT_24_8; | |
| } | |
| // 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; | |
| } | |
| /** | |
| * This method can be used to synchronize the CPU with the GPU by waiting until | |
| * ongoing GPU commands have been completed. | |
| * | |
| * @private | |
| * @return {Promise} A promise that resolves when all ongoing GPU commands have been completed. | |
| */ | |
| _clientWaitAsync() { | |
| const { gl } = this; | |
| const sync = gl.fenceSync( gl.SYNC_GPU_COMMANDS_COMPLETE, 0 ); | |
| gl.flush(); | |
| return new Promise( ( resolve, reject ) => { | |
| function test() { | |
| const res = gl.clientWaitSync( sync, gl.SYNC_FLUSH_COMMANDS_BIT, 0 ); | |
| if ( res === gl.WAIT_FAILED ) { | |
| gl.deleteSync( sync ); | |
| reject(); | |
| return; | |
| } | |
| if ( res === gl.TIMEOUT_EXPIRED ) { | |
| requestAnimationFrame( test ); | |
| return; | |
| } | |
| gl.deleteSync( sync ); | |
| resolve(); | |
| } | |
| test(); | |
| } ); | |
| } | |
| } | |
| export default WebGLUtils; | |
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