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| /** | |
| * @author thespite / http://www.twitter.com/thespite | |
| */ | |
| import { MaxEquation, MinEquation, 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, 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, SrcAlphaSaturateFactor, OneMinusDstColorFactor, DstColorFactor, OneMinusDstAlphaFactor, DstAlphaFactor, OneMinusSrcAlphaFactor, SrcAlphaFactor, OneMinusSrcColorFactor, SrcColorFactor, OneFactor, ZeroFactor, ReverseSubtractEquation, SubtractEquation, AddEquation, DepthFormat, DepthStencilFormat, LuminanceAlphaFormat, LuminanceFormat, RedFormat, RGBAFormat, RGBFormat, AlphaFormat, HalfFloatType, FloatType, UnsignedIntType, IntType, UnsignedShortType, ShortType, ByteType, UnsignedInt248Type, UnsignedShort565Type, UnsignedShort5551Type, UnsignedShort4444Type, UnsignedByteType, LinearMipMapLinearFilter, LinearMipMapNearestFilter, LinearFilter, NearestMipMapLinearFilter, NearestMipMapNearestFilter, NearestFilter, MirroredRepeatWrapping, ClampToEdgeWrapping, RepeatWrapping } from '../../constants.js'; | |
| function WebGLUtils( gl, extensions, capabilities ) { | |
| function convert( p ) { | |
| var extension; | |
| if ( p === RepeatWrapping ) return gl.REPEAT; | |
| if ( p === ClampToEdgeWrapping ) return gl.CLAMP_TO_EDGE; | |
| if ( p === MirroredRepeatWrapping ) return gl.MIRRORED_REPEAT; | |
| if ( p === NearestFilter ) return gl.NEAREST; | |
| if ( p === NearestMipMapNearestFilter ) return gl.NEAREST_MIPMAP_NEAREST; | |
| if ( p === NearestMipMapLinearFilter ) return gl.NEAREST_MIPMAP_LINEAR; | |
| if ( p === LinearFilter ) return gl.LINEAR; | |
| if ( p === LinearMipMapNearestFilter ) return gl.LINEAR_MIPMAP_NEAREST; | |
| if ( p === LinearMipMapLinearFilter ) return gl.LINEAR_MIPMAP_LINEAR; | |
| 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 === UnsignedShort565Type ) return gl.UNSIGNED_SHORT_5_6_5; | |
| 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 ( capabilities.isWebGL2 ) return gl.HALF_FLOAT; | |
| extension = extensions.get( 'OES_texture_half_float' ); | |
| if ( extension !== null ) return extension.HALF_FLOAT_OES; | |
| } | |
| if ( p === AlphaFormat ) return gl.ALPHA; | |
| if ( p === RGBFormat ) return gl.RGB; | |
| 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 === AddEquation ) return gl.FUNC_ADD; | |
| if ( p === SubtractEquation ) return gl.FUNC_SUBTRACT; | |
| if ( p === ReverseSubtractEquation ) return gl.FUNC_REVERSE_SUBTRACT; | |
| if ( p === ZeroFactor ) return gl.ZERO; | |
| if ( p === OneFactor ) return gl.ONE; | |
| if ( p === SrcColorFactor ) return gl.SRC_COLOR; | |
| if ( p === OneMinusSrcColorFactor ) return gl.ONE_MINUS_SRC_COLOR; | |
| if ( p === SrcAlphaFactor ) return gl.SRC_ALPHA; | |
| if ( p === OneMinusSrcAlphaFactor ) return gl.ONE_MINUS_SRC_ALPHA; | |
| if ( p === DstAlphaFactor ) return gl.DST_ALPHA; | |
| if ( p === OneMinusDstAlphaFactor ) return gl.ONE_MINUS_DST_ALPHA; | |
| if ( p === DstColorFactor ) return gl.DST_COLOR; | |
| if ( p === OneMinusDstColorFactor ) return gl.ONE_MINUS_DST_COLOR; | |
| if ( p === SrcAlphaSaturateFactor ) return gl.SRC_ALPHA_SATURATE; | |
| if ( p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format || | |
| p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format ) { | |
| 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; | |
| } | |
| } | |
| 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; | |
| } | |
| } | |
| if ( p === RGB_ETC1_Format ) { | |
| extension = extensions.get( 'WEBGL_compressed_texture_etc1' ); | |
| if ( extension !== null ) return extension.COMPRESSED_RGB_ETC1_WEBGL; | |
| } | |
| 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 ) { | |
| return p; | |
| } | |
| } | |
| if ( p === MinEquation || p === MaxEquation ) { | |
| if ( capabilities.isWebGL2 ) { | |
| if ( p === MinEquation ) return gl.MIN; | |
| if ( p === MaxEquation ) return gl.MAX; | |
| } | |
| extension = extensions.get( 'EXT_blend_minmax' ); | |
| if ( extension !== null ) { | |
| if ( p === MinEquation ) return extension.MIN_EXT; | |
| if ( p === MaxEquation ) return extension.MAX_EXT; | |
| } | |
| } | |
| if ( p === UnsignedInt248Type ) { | |
| if ( capabilities.isWebGL2 ) return gl.UNSIGNED_INT_24_8; | |
| extension = extensions.get( 'WEBGL_depth_texture' ); | |
| if ( extension !== null ) return extension.UNSIGNED_INT_24_8_WEBGL; | |
| } | |
| return 0; | |
| } | |
| return { convert: convert }; | |
| } | |
| export { WebGLUtils }; | |