1 line
8.8 KiB
JavaScript
1 line
8.8 KiB
JavaScript
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const t=new Uint8Array([0]),e=[171,75,84,88,32,50,48,187,13,10,26,10];var n,i,s,a,r,o,l,f;!function(t){t[t.NONE=0]="NONE",t[t.BASISLZ=1]="BASISLZ",t[t.ZSTD=2]="ZSTD",t[t.ZLIB=3]="ZLIB"}(n=n||{}),function(t){t[t.BASICFORMAT=0]="BASICFORMAT"}(i=i||{}),function(t){t[t.UNSPECIFIED=0]="UNSPECIFIED",t[t.ETC1S=163]="ETC1S",t[t.UASTC=166]="UASTC"}(s=s||{}),function(t){t[t.UNSPECIFIED=0]="UNSPECIFIED",t[t.SRGB=1]="SRGB"}(a=a||{}),function(t){t[t.UNSPECIFIED=0]="UNSPECIFIED",t[t.LINEAR=1]="LINEAR",t[t.SRGB=2]="SRGB",t[t.ITU=3]="ITU",t[t.NTSC=4]="NTSC",t[t.SLOG=5]="SLOG",t[t.SLOG2=6]="SLOG2"}(r=r||{}),function(t){t[t.ALPHA_STRAIGHT=0]="ALPHA_STRAIGHT",t[t.ALPHA_PREMULTIPLIED=1]="ALPHA_PREMULTIPLIED"}(o=o||{}),function(t){t[t.RGB=0]="RGB",t[t.RRR=3]="RRR",t[t.GGG=4]="GGG",t[t.AAA=15]="AAA"}(l=l||{}),function(t){t[t.RGB=0]="RGB",t[t.RGBA=3]="RGBA",t[t.RRR=4]="RRR",t[t.RRRG=5]="RRRG"}(f=f||{});class U{constructor(){this.vkFormat=0,this.typeSize=1,this.pixelWidth=0,this.pixelHeight=0,this.pixelDepth=0,this.layerCount=0,this.faceCount=1,this.supercompressionScheme=n.NONE,this.levels=[],this.dataFormatDescriptor=[{vendorId:0,descriptorType:i.BASICFORMAT,versionNumber:2,descriptorBlockSize:40,colorModel:s.UNSPECIFIED,colorPrimaries:a.SRGB,transferFunction:a.SRGB,flags:o.ALPHA_STRAIGHT,texelBlockDimension:{x:4,y:4,z:1,w:1},bytesPlane:[],samples:[]}],this.keyValue={},this.globalData=null}}class c{constructor(t,e,n,i){this._dataView=new DataView(t.buffer,t.byteOffset+e,n),this._littleEndian=i,this._offset=0}_nextUint8(){var t=this._dataView.getUint8(this._offset);return this._offset+=1,t}_nextUint16(){var t=this._dataView.getUint16(this._offset,this._littleEndian);return this._offset+=2,t}_nextUint32(){var t=this._dataView.getUint32(this._offset,this._littleEndian);return this._offset+=4,t}_nextUint64(){var t=this._dataView.getUint32(this._offset,this._littleEndian)+2**32*this._dataView.getUint32(this._offset+4,this._littleEndian);return this._offset+=8,t}_skip(t){return this._offset+=t,this}_scan(t,e=0){var n=this._offset;let i=0;for(;this._dataView.getUint8(this._offset)!==e&&i<t;)i++,this._offset++;return i<t&&this._offset++,new Uint8Array(this._dataView.buffer,this._dataView.byteOffset+n,i)}}function h(t){return"undefined"!=typeof TextEncoder?(new TextEncoder).encode(t):Buffer.from(t)}function _(t){return"undefined"!=typeof TextDecoder?(new TextDecoder).decode(t):Buffer.from(t).toString("utf8")}function g(t){let e=0;for(const n of t)e+=n.byteLength;const n=new Uint8Array(e);let i=0;for(const e of t)n.set(new Uint8Array(e),i),i+=e.byteLength;return n}function p(n){const t=new Uint8Array(n.buffer,n.byteOffset,e.length);if(t[0]!==e[0]||t[1]!==e[1]||t[2]!==e[2]||t[3]!==e[3]||t[4]!==e[4]||t[5]!==e[5]||t[6]!==e[6]||t[7]!==e[7]||t[8]!==e[8]||t[9]!==e[9]||t[10]!==e[10]||t[11]!==e[11])throw new Error("Missing KTX 2.0 identifier.");const i=new U,s=17*Uint32Array.BYTES_PER_ELEMENT,a=new c(n,e.length,s,!0);i.vkFormat=a._nextUint32(),i.typeSize=a._nextUint32(),i.pixelWidth=a._nextUint32(),i.pixelHeight=a._nextUint32(),i.pixelDepth=a._nextUint32(),i.layerCount=a._nextUint32(),i.faceCount=a._nextUint32();var r=a._nextUint32();i.supercompressionScheme=a._nextUint32();const o=a._nextUint32(),l=a._nextUint32(),f=a._nextUint32(),h=a._nextUint32(),g=a._nextUint64(),p=a._nextUint64(),x=new c(n,e.length+s,3*r*8,!0);for(let t=0;t<r;t++)i.levels.push({levelData:new Uint8Array(n.buffer,n.byteOffset+x._nextUint64(),x._nextUint64()),uncompressedByteLength:x._nextUint64()});const u=new c(n,o,l,!0),y={vendorId:u._skip(4)._nextUint16(),descriptorType:u._nextUint16(),versionNumber:u._nextUint16(),descriptorBlockSize:u._nextUint16(),colorModel:u._nextUint8(),colorPrimaries:u._nextUint8(),transferFunction:u._nextUint8(),flags:u._nextUint8(),texelBlockDimension:{x:u._nextUint8()+1,y:u._nextUint8()+1,z:u._nextUint8()+1,w:u._nextUint8()+1},bytesPlane:[u._nextUint8(),u._nextUint8(),u._nextUint8(),u._nextUint8(),u._nextUint8(),u._nextUint8(),u._nextUint8(),u._nextUint8()],samples:[]},D=(y.descriptorBlockSize/4-6)/4;for(let t=0;t<D;t++)y.samples[t]={bitOffset:u._nextUint16()
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