feat: switch to array buffer

src/core/blitzkrieg/superCompress.ts

@@ -3,6 +3,6 @@ import { CdonWriteStream } from '../streams/cdon';
 
 export function superCompress(object: any) {
   const write = new CdonWriteStream().cdon(object);
-  const compressed = compress(write.buffer);
+  const compressed = compress(write.uint8Array);
   return Buffer.from(compressed).toString('base64');
 }

src/core/streams/buffer.ts

@@ -1,19 +1,27 @@
 export class ReadStream {
   public index = 0;
-  constructor(public buffer: Buffer) {}
+  private dataView: DataView;
+  private textDecoderAscii = new TextDecoder('ascii');
+  private textDecoderUtf8 = new TextDecoder('utf8');
 
-  skip(size: number) {
+  constructor(public buffer: ArrayBuffer) {
+    this.dataView = new DataView(buffer);
+  }
+
+  seek(size: number) {
     this.index += size;
   }
   read(size: number) {
-    return this.buffer.subarray(this.index, this.index + size);
+    return this.buffer.slice(this.index, this.index + size);
   }
   consume(size: number) {
     const subarray = this.read(size);
-    this.skip(size);
+    this.seek(size);
-
     return subarray;
   }
+  consumeUint8Array(size: number) {
+    return new Uint8Array(this.consume(size));
+  }
   increment(size: number) {
     return (this.index += size) - size;
   }
@@ -21,9 +29,6 @@ export class ReadStream {
   readRemaining() {
     return this.read(Number.POSITIVE_INFINITY);
   }
-  readRemainingLength() {
-    return this.buffer.length - this.index;
-  }
   consumeRemaining() {
     return this.consume(Number.POSITIVE_INFINITY);
   }
@@ -33,57 +38,54 @@ export class ReadStream {
   }
 
   ascii(size: number) {
-    return this.buffer.toString('ascii', this.increment(size), this.index);
+    return this.textDecoderAscii.decode(this.consume(size));
   }
   utf8(size: number) {
-    return this.buffer.toString('utf8', this.increment(size), this.index);
+    return this.textDecoderUtf8.decode(this.consume(size));
   }
 
   int8() {
-    return this.buffer.readInt8(this.increment(1));
+    return this.dataView.getInt8(this.increment(1));
   }
   int16() {
-    return this.buffer.readInt16LE(this.increment(2));
+    return this.dataView.getInt16(this.increment(2), true);
   }
   int32() {
-    return this.buffer.readInt32LE(this.increment(4));
+    return this.dataView.getInt32(this.increment(4), true);
   }
   int64() {
-    return this.buffer.readBigInt64LE(this.increment(8));
+    return this.dataView.getBigInt64(this.increment(8), true);
   }
   uint8() {
-    return this.buffer.readUInt8(this.increment(1));
+    return this.dataView.getUint8(this.increment(1));
   }
   uint16() {
-    return this.buffer.readUInt16LE(this.increment(2));
+    return this.dataView.getUint16(this.increment(2), true);
   }
   uint32() {
-    return this.buffer.readUInt32LE(this.increment(4));
+    return this.dataView.getUint32(this.increment(4), true);
   }
   uint64() {
-    return this.buffer.readBigUInt64LE(this.increment(8));
+    return this.dataView.getBigUint64(this.increment(8), true);
   }
   float32() {
-    return this.buffer.readFloatLE(this.increment(4));
+    return this.dataView.getFloat32(this.increment(4), true);
   }
   float64() {
-    return this.buffer.readDoubleLE(this.increment(8));
+    return this.dataView.getFloat64(this.increment(8), true);
   }
 
   boolean() {
-    return this.buffer.readUInt8(this.increment(1)) === 1;
+    return this.dataView.getUint8(this.increment(1)) === 1;
   }
 }
 
 export class WriteStream {
   private array: number[] = [];
+  private textEncoder = new TextEncoder();
 
-  get buffer() {
+  get uint8Array() {
-    return Buffer.from(this.array);
+    return new Uint8Array(this.array);
-  }
-
-  constructor(buffer?: Buffer) {
-    if (buffer) this.array = Array.from(buffer);
   }
 
   byte(value: Uint8Array) {
@@ -98,13 +100,7 @@ export class WriteStream {
     return this;
   }
   utf8(value: string) {
-    const buffer = Buffer.alloc(Buffer.byteLength(value));
+    this.array.push(...this.textEncoder.encode(value));
-
-    buffer.write(value, 'utf8');
-    buffer.forEach((value) => {
-      this.array.push(value);
-    });
-
     return this;
   }
 

src/core/streams/dds.ts

@@ -331,10 +331,10 @@ export class DdsReadStream extends WindowsReadStream {
   }
 
   readR5G6B5Int() {
-    return this.read(2).readUInt16LE();
+    return new DataView(this.read(2)).getUint16(0, true);
   }
   R5G6B5() {
-    const buffer = this.consume(2);
+    const buffer = this.consumeUint8Array(2);
     const r = (buffer[1] & 0b11111000) >>> 3;
     const g = ((buffer[1] & 0b111) << 3) | ((buffer[0] & 0b11100000) >>> 5);
     const b = buffer[0] & 0b11111;
@@ -375,7 +375,7 @@ export class DdsReadStream extends WindowsReadStream {
     } as Record<number, Vector4Tuple>;
   }
   bc1ColorKeys() {
-    const buffer = this.consume(4);
+    const buffer = this.consumeUint8Array(4);
     const d = (buffer[0] & 0b11000000) >>> 6;
     const c = (buffer[0] & 0b110000) >>> 4;
     const b = (buffer[0] & 0b1100) >>> 2;
@@ -396,7 +396,7 @@ export class DdsReadStream extends WindowsReadStream {
     return [a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p];
   }
   bc2AlphaInterpolations() {
-    const buffer = this.consume(8);
+    const buffer = this.consumeUint8Array(8);
     const d = (buffer[1] & 0b11110000) >>> 4;
     const c = buffer[1] & 0b1111;
     const b = (buffer[0] & 0b11110000) >>> 4;
@@ -464,7 +464,7 @@ export class DdsReadStream extends WindowsReadStream {
     } as Record<number, number>;
   }
   bc3AlphaKeys() {
-    const buffer = this.consume(6);
+    const buffer = this.consumeUint8Array(6);
     const h = (buffer[2] & 0b11100000) >>> 5;
     const g = (buffer[2] & 0b11100) >>> 2;
     const f = ((buffer[2] & 0b11) << 1) | ((buffer[1] & 0b10000000) >>> 7);

src/core/streams/pvr.ts

@@ -116,7 +116,7 @@ export class PvrReadStream extends ReadStream {
           const data = Buffer.alloc(pixelCount * 4);
 
           times(pixelCount, (index) => {
-            const buffer = this.consume(2);
+            const buffer = this.consumeUint8Array(2);
             const bufferIndex = index * 4;
             const r = ((buffer[1] & 0b11110000) >>> 4) / 15;
             const g = (buffer[1] & 0b1111) / 15;
@@ -141,7 +141,7 @@ export class PvrReadStream extends ReadStream {
           const data = Buffer.alloc(pixelCount * 3);
 
           times(pixelCount, (index) => {
-            const buffer = this.consume(2);
+            const buffer = this.consumeUint8Array(2);
             const bufferIndex = index * 4;
             const r = ((buffer[1] & 0b11111000) >>> 3) / 31;
             const g =
@@ -191,9 +191,9 @@ export class PvrReadStream extends ReadStream {
     return header;
   }
   pixelFormat() {
-    this.skip(4);
+    this.seek(4);
     const usesPresetFormat = this.uint32() === 0;
-    this.skip(-8);
+    this.seek(-8);
 
     return usesPresetFormat
       ? (Number(this.uint64()) as PvrPixelFormat)

src/core/streams/sc2.ts

@@ -306,7 +306,7 @@ export class Sc2ReadStream extends ScpgReadStream {
     const fileType = this.uint32();
 
     // other felids that we don't have any info about
-    this.skip(size - 4);
+    this.seek(size - 4);
 
     return { size, fileType };
   }

src/core/streams/scg.ts

@@ -89,9 +89,9 @@ export class ScgReadStream extends ScpgReadStream {
       );
       const strideBasedSize = stride * polygonGroupRaw.vertexCount;
 
-      if (verticesStream.buffer.length !== strideBasedSize) {
+      if (verticesStream.buffer.byteLength !== strideBasedSize) {
         console.warn(
-          `Vertex stride mismatch; expected ${strideBasedSize}, got ${verticesStream.buffer.length}; skipping...`,
+          `Vertex stride mismatch; expected ${strideBasedSize}, got ${verticesStream.buffer.byteLength}; skipping...`,
         );
 
         return;
@@ -104,10 +104,6 @@ export class ScgReadStream extends ScpgReadStream {
         }));
       }
 
-      if (verticesStream.readRemainingLength() !== 0) {
-        throw new RangeError('Vertices stream was not fully consumed');
-      }
-
       polygonGroups.set(polygonGroupRaw['#id'].readBigUInt64LE(), {
         vertices,
         indices,

src/core/streams/scpg.ts

@@ -121,7 +121,7 @@ export class ScpgReadStream extends ReadStream {
       }
 
       case KAType.KEYED_ARCHIVE: {
-        this.skip(4); // UInt32 length of the nested archive in bytes
+        this.seek(4); // UInt32 length of the nested archive in bytes
 
         return this.ka(stringTable);
       }
@@ -195,7 +195,7 @@ export class ScpgReadStream extends ReadStream {
     }
   }
   ka(stringTable?: Record<number, string>) {
-    this.skip(2); // "KA"
+    this.seek(2); // "KA"
     const version = this.uint16();
     const pairs: Record<string, any> = {};