style: Minor improvements to code readability

src/formats/jpeg/jpeg-quantize.ts

@@ -68,14 +68,22 @@ export abstract class JpegQuantize {
     const p = dataIn;
 
     // IDCT constants (20.12 fixed point format)
-    const cos1 = 4017; // cos(pi/16)*4096
-    const sin1 = 799; // sin(pi/16)*4096
-    const cos3 = 3406; // cos(3*pi/16)*4096
-    const sin3 = 2276; // sin(3*pi/16)*4096
-    const cos6 = 1567; // cos(6*pi/16)*4096
-    const sin6 = 3784; // sin(6*pi/16)*4096
-    const sqrt2 = 5793; // sqrt(2)*4096
-    const sqrt102 = 2896; // sqrt(2) / 2
+    // cos(pi/16)*4096
+    const cos1 = 4017;
+    // sin(pi/16)*4096
+    const sin1 = 799;
+    // cos(3*pi/16)*4096
+    const cos3 = 3406;
+    // sin(3*pi/16)*4096
+    const sin3 = 2276;
+    // cos(6*pi/16)*4096
+    const cos6 = 1567;
+    // sin(6*pi/16)*4096
+    const sin6 = 3784;
+    // sqrt(2)*4096
+    const sqrt2 = 5793;
+    // sqrt(2) / 2
+    const sqrt102 = 2896;
 
     // de-quantize
     for (let i = 0; i < 64; i++) {

src/formats/webp/vp8.ts

@@ -1325,10 +1325,10 @@ export class VP8 {
         InputBuffer.from(topDst, (2 * x - 1) * 4)
       );
       this.yuvToRgba(
-        topY.get(2 * x - 0),
+        topY.get(2 * x),
         uv1 & 0xff,
         uv1 >>> 16,
-        InputBuffer.from(topDst, (2 * x - 0) * 4)
+        InputBuffer.from(topDst, 2 * x * 4)
       );
 
       if (bottomY !== undefined) {

src/formats/webp/webp-filters.ts

@@ -172,12 +172,7 @@ export class WebPFilters {
    */
   private static gradientPredictor(a: number, b: number, c: number): number {
     const g = a + b - c;
-    return (g & ~0xff) === 0
-      ? g
-      : g < 0
-        ? 0
-        : // clip to 8bit
-          255;
+    return (g & ~0xff) === 0 ? g : g < 0 ? 0 : 255;
   }
 
   /**