Rename constants

src/ImageSharp/Formats/WebP/ColorCache.cs

@@ -8,7 +8,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
     /// </summary>
     internal class ColorCache
     {
-        private const uint KHashMul = 0x1e35a7bdu;
+        private const uint HashMul = 0x1e35a7bdu;
 
         /// <summary>
         /// Gets the color entries.
@@ -54,7 +54,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
 
         private int HashPix(uint argb, int shift)
         {
-            return (int)((argb * KHashMul) >> shift);
+            return (int)((argb * HashMul) >> shift);
         }
     }
 }

src/ImageSharp/Formats/WebP/Vp8LBitReader.cs

@@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
         /// </summary>
         private const int Vp8LWbits = 32;
 
-        private readonly uint[] kBitMask =
+        private readonly uint[] BitMask =
         {
             0,
             0x000001, 0x000003, 0x000007, 0x00000f,
@@ -106,7 +106,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
 
             if (!this.eos && nBits <= Vp8LMaxNumBitRead)
             {
-                ulong val = this.PrefetchBits() & this.kBitMask[nBits];
+                ulong val = this.PrefetchBits() & this.BitMask[nBits];
                 int newBits = this.bitPos + nBits;
                 this.bitPos = newBits;
                 this.ShiftBytes();

src/ImageSharp/Formats/WebP/Vp8QuantMatrix.cs

@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
 
         public int[] Y2Mat { get; set; }
 
-        public int[] UVMat { get; set; }
+        public int[] UvMat { get; set; }
 
         /// <summary>
         /// Gets or sets the U/V quantizer value.

src/ImageSharp/Formats/WebP/WebPConstants.cs

@@ -90,15 +90,15 @@ namespace SixLabors.ImageSharp.Formats.WebP
 
         public const int LengthTableBits = 7;
 
-        public const uint KCodeLengthLiterals = 16;
+        public const uint CodeLengthLiterals = 16;
 
-        public const int KCodeLengthRepeatCode = 16;
+        public const int CodeLengthRepeatCode = 16;
 
-        public static readonly int[] KCodeLengthExtraBits = { 2, 3, 7 };
+        public static readonly int[] CodeLengthExtraBits = { 2, 3, 7 };
 
-        public static readonly int[] KCodeLengthRepeatOffsets = { 3, 3, 11 };
+        public static readonly int[] CodeLengthRepeatOffsets = { 3, 3, 11 };
 
-        public static readonly int[] KAlphabetSize =
+        public static readonly int[] AlphabetSize =
         {
                                                          NumLiteralCodes + NumLengthCodes,
                                                          NumLiteralCodes, NumLiteralCodes, NumLiteralCodes,
@@ -131,6 +131,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
             138, 140, 143, 145, 148, 151, 154, 157
         };
 
+        // Paragraph 14.1
         public static readonly int[] AcTable =
         {
             4,     5,   6,   7,   8,   9,  10,  11,
@@ -150,5 +151,11 @@ namespace SixLabors.ImageSharp.Formats.WebP
             213, 217, 221, 225, 229, 234, 239, 245,
             249, 254, 259, 264, 269, 274, 279, 284
         };
+
+        // Paragraph 9.9
+        public static readonly int[] Bands =
+        {
+            0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 0
+        };
     }
 }

src/ImageSharp/Formats/WebP/WebPDecoderCore.cs

@@ -492,8 +492,8 @@ namespace SixLabors.ImageSharp.Formats.WebP
                     m.Y2Mat[1] = 8;
                 }
 
-                m.UVMat[0] = WebPConstants.DcTable[this.Clip(q + dquvDc, 117)];
+                m.UvMat[0] = WebPConstants.DcTable[this.Clip(q + dquvDc, 117)];
-                m.UVMat[1] = WebPConstants.AcTable[this.Clip(q + dquvAc, 127)];
+                m.UvMat[1] = WebPConstants.AcTable[this.Clip(q + dquvAc, 127)];
 
                 // For dithering strength evaluation.
                 m.UvQuant = q + dquvAc;

src/ImageSharp/Formats/WebP/WebPLosslessDecoder.cs

@@ -380,7 +380,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
             // Find maximum alphabet size for the hTree group.
             for (int j = 0; j < WebPConstants.HuffmanCodesPerMetaCode; j++)
             {
-                int alphabetSize = WebPConstants.KAlphabetSize[j];
+                int alphabetSize = WebPConstants.AlphabetSize[j];
                 if (j == 0 && colorCacheBits > 0)
                 {
                     alphabetSize += 1 << colorCacheBits;
@@ -406,7 +406,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
                 var codeLengths = new int[maxAlphabetSize];
                 for (int j = 0; j < WebPConstants.HuffmanCodesPerMetaCode; j++)
                 {
-                    int alphabetSize = WebPConstants.KAlphabetSize[j];
+                    int alphabetSize = WebPConstants.AlphabetSize[j];
                     if (j == 0 && colorCacheBits > 0)
                     {
                         alphabetSize += 1 << colorCacheBits;
@@ -560,7 +560,7 @@ namespace SixLabors.ImageSharp.Formats.WebP
                 HuffmanCode huffmanCode = table[idx];
                 this.bitReader.AdvanceBitPosition(huffmanCode.BitsUsed);
                 uint codeLen = huffmanCode.Value;
-                if (codeLen < WebPConstants.KCodeLengthLiterals)
+                if (codeLen < WebPConstants.CodeLengthLiterals)
                 {
                     codeLengths[symbol++] = (int)codeLen;
                     if (codeLen != 0)
@@ -570,10 +570,10 @@ namespace SixLabors.ImageSharp.Formats.WebP
                 }
                 else
                 {
-                    bool usePrev = codeLen == WebPConstants.KCodeLengthRepeatCode;
+                    bool usePrev = codeLen == WebPConstants.CodeLengthRepeatCode;
-                    uint slot = codeLen - WebPConstants.KCodeLengthLiterals;
+                    uint slot = codeLen - WebPConstants.CodeLengthLiterals;
-                    int extraBits = WebPConstants.KCodeLengthExtraBits[slot];
+                    int extraBits = WebPConstants.CodeLengthExtraBits[slot];
-                    int repeatOffset = WebPConstants.KCodeLengthRepeatOffsets[slot];
+                    int repeatOffset = WebPConstants.CodeLengthRepeatOffsets[slot];
                     int repeat = (int)(this.bitReader.ReadValue(extraBits) + repeatOffset);
                     if (symbol + repeat > numSymbols)
                     {