diff --git a/ArcFormats/Unity/Bc7Decoder.cs b/ArcFormats/Unity/Bc7Decoder.cs new file mode 100644 index 00000000..1a4cee37 --- /dev/null +++ b/ArcFormats/Unity/Bc7Decoder.cs @@ -0,0 +1,571 @@ +//! \file Bc7Decoder.cs +//! \date 2022 May 03 +//! \brief BC7 texture compression decoder. +// +// Based on the [bc7enc](https://github.com/richgel999/bc7enc) +// +// Copyright(c) 2020 Richard Geldreich, Jr. +// +// C# port copyright (C) 2022 by morkt +// +// Permission is hereby granted, free of charge, to any person obtaining a copy of +// this software and associated documentation files(the "Software"), to deal in +// the Software without restriction, including without limitation the rights to +// use, copy, modify, merge, publish, distribute, sublicense, and / or sell copies +// of the Software, and to permit persons to whom the Software is furnished to do +// so, subject to the following conditions : +// +// The above copyright notice and this permission notice shall be included in all +// copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +// SOFTWARE. + +using System; +using GameRes.Utility; + +namespace GameRes.Formats.Unity +{ + public class Bc7Decoder + { + byte[] m_input; + int m_width; + int m_height; + int m_output_stride; + byte[] m_output; + byte[] m_block = new byte[64]; + + public Bc7Decoder (byte[] input, ImageMetaData info) + { + m_input = input; + m_width = info.iWidth; + m_output_stride = m_width * 4; + m_height = info.iHeight; + m_output = new byte[m_output_stride*m_height]; + } + + public byte[] Unpack () + { + int block_step_y = m_output_stride * 4; + int block_step_x = 16; + int src = 0; + for (int y = 0; y < m_output.Length; y += block_step_y) + for (int x = 0; x < m_output_stride; x += block_step_x) + { + DecompressBc7Block (src); + int dst = y + x; + int block_src = 0; + for (int i = 0; i < 4; ++i) + { + int row_dst = dst; + for (int j = 0; j < 4; ++j) + { + m_output[row_dst++] = m_block[block_src+2]; + m_output[row_dst++] = m_block[block_src+1]; + m_output[row_dst++] = m_block[block_src ]; + m_output[row_dst++] = m_block[block_src+3]; + block_src += 4; + } + dst += m_output_stride; + } + src += 16; + } + return m_output; + } + + private bool DecompressBc7Block (int src) + { + byte first_byte = m_input[src]; + for (int mode = 0; mode < 8; ++mode) + { + if ((first_byte & (1u << mode)) != 0) + { + switch (mode) + { + case 0: + case 2: + return UnpackBc7Mode0_2 (mode, src); + case 1: + case 3: + case 7: + return UnpackBc7Mode1_3_7 (mode, src); + case 4: + case 5: + return UnpackBc7Mode4_5 (mode, src); + case 6: + return UnpackBc7Mode6 (src); + } + } + } + return false; + } + + int m_bit_offset; + + uint ReadBits32 (int src, int codesize) + { + uint bits = 0; + int total_bits = 0; + + while (total_bits < codesize) + { + int byte_bit_offset = m_bit_offset & 7; + int bits_to_read = Math.Min (codesize - total_bits, 8 - byte_bit_offset); + + uint byte_bits = (uint)m_input[src + (m_bit_offset >> 3)] >> byte_bit_offset; + byte_bits &= ((1u << bits_to_read) - 1u); + + bits |= (byte_bits << total_bits); + + total_bits += bits_to_read; + m_bit_offset += bits_to_read; + } + return bits; + } + + byte[] endpoints = new byte[8 * 4]; + uint[] pbits = new uint[6]; + uint[] weights = new uint[16]; + uint[] a_weights = new uint[16]; + int[] weight_bits = new int[2]; + byte[,] block_colors= new byte[3,32]; + + bool UnpackBc7Mode0_2 (int mode, int src) + { + const uint ENDPOINTS = 6; + const uint COMPS = 3; + int WEIGHT_BITS = (mode == 0) ? 3 : 2; + int ENDPOINT_BITS = (mode == 0) ? 4 : 5; + int PBITS = (mode == 0) ? 6 : 0; + uint WEIGHT_VALS = 1u << WEIGHT_BITS; + + m_bit_offset = 0; + + if (ReadBits32 (src, mode + 1) != (1u << mode)) + return false; + + uint part = ReadBits32 (src, (mode == 0) ? 4 : 6); + + for (uint c = 0; c < COMPS; c++) + for (uint e = 0; e < ENDPOINTS * 4; e += 4) + endpoints[e+c] = (byte)ReadBits32(src, ENDPOINT_BITS); + + for (uint p = 0; p < PBITS; p++) + pbits[p] = ReadBits32 (src, 1); + + for (uint i = 0; i < 16; i++) + weights[i] = ReadBits32 (src, ((i == 0) || (i == s_bc7_table_anchor_index_third_subset_1[part]) || (i == s_bc7_table_anchor_index_third_subset_2[part])) ? (WEIGHT_BITS - 1) : WEIGHT_BITS); + + for (uint e = 0; e < ENDPOINTS * 4; e += 4) + for (uint c = 0; c < 4; c++) + endpoints[e+c] = (byte)((c == 3) ? 0xFF : (PBITS != 0 ? bc7_dequant(endpoints[e+c], pbits[e/4], ENDPOINT_BITS) : bc7_dequant(endpoints[e+c], ENDPOINT_BITS))); + + for (uint s = 0; s < 3; s++) + for (uint i = 0; i < WEIGHT_VALS*4; i += 4) + { + for (uint c = 0; c < 3; c++) + block_colors[s,i+c] = (byte)bc7_interp(endpoints[s * 8 + c], endpoints[s * 8 + 4 + c], i/4, WEIGHT_BITS); + block_colors[s,i+3] = 0xFF; + } + + for (uint i = 0; i < 16*4; i += 4) + { + int b = s_bc7_partition3[part * 16 + i/4]; + uint c = weights[i/4] * 4; + m_block[i ] = block_colors[b,c]; + m_block[i+1] = block_colors[b,c+1]; + m_block[i+2] = block_colors[b,c+2]; + m_block[i+3] = block_colors[b,c+3]; + } + return true; + } + + bool UnpackBc7Mode1_3_7 (int mode, int src) + { + const uint ENDPOINTS = 4; + int COMPS = (mode == 7) ? 4 : 3; + int WEIGHT_BITS = (mode == 1) ? 3 : 2; + int ENDPOINT_BITS = (mode == 7) ? 5 : ((mode == 1) ? 6 : 7); + int PBITS = (mode == 1) ? 2 : 4; + bool SHARED_PBITS = mode == 1; + uint WEIGHT_VALS = 1u << WEIGHT_BITS; + + m_bit_offset = 0; + + if (ReadBits32 (src, mode + 1) != (1u << mode)) + return false; + + uint part = ReadBits32 (src, 6); + + for (uint c = 0; c < COMPS; c++) + for (uint e = 0; e < ENDPOINTS * 4; e += 4) + endpoints[e+c] = (byte)ReadBits32(src, ENDPOINT_BITS); + + for (uint p = 0; p < PBITS; p++) + pbits[p] = ReadBits32 (src, 1); + + for (uint i = 0; i < 16; i++) + weights[i] = ReadBits32(src, ((i == 0) || (i == s_bc7_table_anchor_index_second_subset[part])) ? (WEIGHT_BITS - 1) : WEIGHT_BITS); + + for (uint e = 0; e < ENDPOINTS*4; e += 4) + for (uint c = 0; c < 4; c++) + endpoints[e+c] = (byte)((c == ((mode == 7u) ? 4u : 3u)) ? 0xFF : bc7_dequant(endpoints[e+c], pbits[SHARED_PBITS ? ((e/4) >> 1) : (e/4)], ENDPOINT_BITS)); + + for (uint s = 0; s < 2; s++) + for (uint i = 0; i < WEIGHT_VALS*4; i += 4) + { + for (uint c = 0; c < COMPS; c++) + block_colors[s,i+c] = (byte)bc7_interp(endpoints[(s * 2)*4+c], endpoints[(s * 2 + 1)*4+c], i/4, WEIGHT_BITS); + block_colors[s,i+3] = (COMPS == 3) ? (byte)0xFF : block_colors[s,i+3]; + } + + for (uint i = 0; i < 16*4; i += 4) + { + int b = s_bc7_partition2[part * 16 + i/4]; + uint c = weights[i/4] * 4; + m_block[i ] = block_colors[b,c]; + m_block[i+1] = block_colors[b,c+1]; + m_block[i+2] = block_colors[b,c+2]; + m_block[i+3] = block_colors[b,c+3]; + } + return true; + } + + bool UnpackBc7Mode4_5 (int mode, int src) + { + const uint ENDPOINTS = 2; + const uint COMPS = 4; + const int WEIGHT_BITS = 2; + int A_WEIGHT_BITS = (mode == 4) ? 3 : 2; + int ENDPOINT_BITS = (mode == 4) ? 5 : 7; + int A_ENDPOINT_BITS = (mode == 4) ? 6 : 8; + + m_bit_offset = 0; + + if (ReadBits32(src, mode + 1) != (1u << mode)) + return false; + + uint comp_rot = ReadBits32 (src, 2); + uint index_mode = (mode == 4) ? ReadBits32 (src, 1) : 0; + + for (uint c = 0; c < COMPS; c++) + for (uint e = 0; e < ENDPOINTS*4; e += 4) + endpoints[e+c] = (byte)ReadBits32(src, (c == 3) ? A_ENDPOINT_BITS : ENDPOINT_BITS); + + weight_bits[0] = index_mode != 0 ? A_WEIGHT_BITS : WEIGHT_BITS; + weight_bits[1] = index_mode != 0 ? WEIGHT_BITS : A_WEIGHT_BITS; + + uint[] w_array = index_mode != 0 ? a_weights : weights; + for (uint i = 0; i < 16; i++) + w_array[i] = ReadBits32 (src, weight_bits[index_mode] - ((i == 0) ? 1 : 0)); + + w_array = index_mode != 0 ? weights : a_weights; + for (uint i = 0; i < 16; i++) + w_array[i] = ReadBits32 (src, weight_bits[1 - index_mode] - ((i == 0) ? 1 : 0)); + + for (uint e = 0; e < ENDPOINTS*4; e += 4) + for (uint c = 0; c < 4; c++) + endpoints[e+c] = (byte)bc7_dequant(endpoints[e+c], (c == 3) ? A_ENDPOINT_BITS : ENDPOINT_BITS); + + for (uint i = 0; i < (1U << weight_bits[0]) * 4; i += 4) + for (uint c = 0; c < 3; c++) + block_colors[0,i+c] = (byte)bc7_interp(endpoints[c], endpoints[4+c], i/4, weight_bits[0]); + + for (uint i = 0; i < (1U << weight_bits[1]) * 4; i += 4) + block_colors[0,i+3] = (byte)bc7_interp(endpoints[3], endpoints[4+3], i/4, weight_bits[1]); + + for (uint i = 0; i < 16*4; i += 4) + { + uint w = weights[i / 4] * 4; + m_block[i ] = block_colors[0,w]; + m_block[i+1] = block_colors[0,w+1]; + m_block[i+2] = block_colors[0,w+2]; + m_block[i+3] = block_colors[0,a_weights[i/4]*4+3]; + if (comp_rot >= 1) + { + byte a = m_block[i+3]; + m_block[i+3] = m_block[i+comp_rot-1]; + m_block[i+comp_rot-1] = a; + } + } + return true; + } + + internal class Bc7Mode_6 + { + public struct Lo + { + public byte mode ; //: 7; + public byte r0 ; //: 7; + public byte r1 ; //: 7; + public byte g0 ; //: 7; + public byte g1 ; //: 7; + public byte b0 ; //: 7; + public byte b1 ; //: 7; + public byte a0 ; //: 7; + public byte a1 ; //: 7; + public byte p0 ; //: 1; + } + public struct Hi + { + public byte p1 ; //: 1; + public byte s00 ; //: 3; + public byte s10 ; //: 4; + public byte s20 ; //: 4; + public byte s30 ; //: 4; + + public byte s01 ; //: 4; + public byte s11 ; //: 4; + public byte s21 ; //: 4; + public byte s31 ; //: 4; + + public byte s02 ; //: 4; + public byte s12 ; //: 4; + public byte s22 ; //: 4; + public byte s32 ; //: 4; + + public byte s03 ; //: 4; + public byte s13 ; //: 4; + public byte s23 ; //: 4; + public byte s33 ; //: 4; + } + public Lo m_lo; + public Hi m_hi; + + public void Unpack (byte[] input, int src) + { + ulong lo_bits = input.ToUInt64 (src); + ulong hi_bits = input.ToUInt64 (src+8); + m_lo.mode = (byte)( lo_bits & 0x7F); + m_lo.r0 = (byte)((lo_bits >> 7) & 0x7F); + m_lo.r1 = (byte)((lo_bits >> 14) & 0x7F); + m_lo.g0 = (byte)((lo_bits >> 21) & 0x7F); + m_lo.g1 = (byte)((lo_bits >> 28) & 0x7F); + m_lo.b0 = (byte)((lo_bits >> 35) & 0x7F); + m_lo.b1 = (byte)((lo_bits >> 42) & 0x7F); + m_lo.a0 = (byte)((lo_bits >> 49) & 0x7F); + m_lo.a1 = (byte)((lo_bits >> 56) & 0x7F); + m_lo.p0 = (byte)((lo_bits >> 63)); + + m_hi.p1 = (byte)((hi_bits & 1)); + m_hi.s00 = (byte)((hi_bits >> 1) & 0x7); + m_hi.s10 = (byte)((hi_bits >> 4) & 0xF); + m_hi.s20 = (byte)((hi_bits >> 8) & 0xF); + m_hi.s30 = (byte)((hi_bits >> 12) & 0xF); + m_hi.s01 = (byte)((hi_bits >> 16) & 0xF); + m_hi.s11 = (byte)((hi_bits >> 20) & 0xF); + m_hi.s21 = (byte)((hi_bits >> 24) & 0xF); + m_hi.s31 = (byte)((hi_bits >> 28) & 0xF); + m_hi.s02 = (byte)((hi_bits >> 32) & 0xF); + m_hi.s12 = (byte)((hi_bits >> 36) & 0xF); + m_hi.s22 = (byte)((hi_bits >> 40) & 0xF); + m_hi.s32 = (byte)((hi_bits >> 44) & 0xF); + m_hi.s03 = (byte)((hi_bits >> 48) & 0xF); + m_hi.s13 = (byte)((hi_bits >> 52) & 0xF); + m_hi.s23 = (byte)((hi_bits >> 56) & 0xF); + m_hi.s33 = (byte)((hi_bits >> 60)); + } + } + + Bc7Mode_6 mode_6_block = new Bc7Mode_6(); + uint[] vals = new uint[16]; + + bool UnpackBc7Mode6(int src) + { + mode_6_block.Unpack (m_input, src); + var block = mode_6_block; + + if (block.m_lo.mode != (1 << 6)) + return false; + + uint r0 = (uint)((block.m_lo.r0 << 1) | block.m_lo.p0); + uint g0 = (uint)((block.m_lo.g0 << 1) | block.m_lo.p0); + uint b0 = (uint)((block.m_lo.b0 << 1) | block.m_lo.p0); + uint a0 = (uint)((block.m_lo.a0 << 1) | block.m_lo.p0); + uint r1 = (uint)((block.m_lo.r1 << 1) | block.m_hi.p1); + uint g1 = (uint)((block.m_lo.g1 << 1) | block.m_hi.p1); + uint b1 = (uint)((block.m_lo.b1 << 1) | block.m_hi.p1); + uint a1 = (uint)((block.m_lo.a1 << 1) | block.m_hi.p1); + + for (int i = 0; i < 16; i++) + { + uint w = s_bc7_weights4[i]; + uint iw = 64 - w; + SetNoclampRgba(vals, i, + (r0 * iw + r1 * w + 32u) >> 6, + (g0 * iw + g1 * w + 32u) >> 6, + (b0 * iw + b1 * w + 32u) >> 6, + (a0 * iw + a1 * w + 32u) >> 6); + } + + LittleEndian.Pack (vals[block.m_hi.s00], m_block, 0); + LittleEndian.Pack (vals[block.m_hi.s10], m_block, 4); + LittleEndian.Pack (vals[block.m_hi.s20], m_block, 8); + LittleEndian.Pack (vals[block.m_hi.s30], m_block, 12); + + LittleEndian.Pack (vals[block.m_hi.s01], m_block, 16); + LittleEndian.Pack (vals[block.m_hi.s11], m_block, 20); + LittleEndian.Pack (vals[block.m_hi.s21], m_block, 24); + LittleEndian.Pack (vals[block.m_hi.s31], m_block, 28); + + LittleEndian.Pack (vals[block.m_hi.s02], m_block, 32); + LittleEndian.Pack (vals[block.m_hi.s12], m_block, 36); + LittleEndian.Pack (vals[block.m_hi.s22], m_block, 40); + LittleEndian.Pack (vals[block.m_hi.s32], m_block, 44); + + LittleEndian.Pack (vals[block.m_hi.s03], m_block, 48); + LittleEndian.Pack (vals[block.m_hi.s13], m_block, 52); + LittleEndian.Pack (vals[block.m_hi.s23], m_block, 56); + LittleEndian.Pack (vals[block.m_hi.s33], m_block, 60); + + return true; + } + + static void SetNoclampRgba (uint[] vals, int dst, uint sr, uint sg, uint sb, uint sa) + { + vals[dst] = (sr & 0xFF) | ((sg & 0xFF) << 8) | ((sb & 0xFF) << 16) | ((sa & 0xFF) << 24); + } + + static uint bc7_dequant (uint val, uint pbit, int val_bits) + { + int total_bits = val_bits + 1; + val = (val << 1) | pbit; + val <<= (8 - total_bits); + val |= (val >> total_bits); + return val; + } + + static uint bc7_dequant (uint val, int val_bits) + { + val <<= (8 - val_bits); + val |= (val >> val_bits); + return val; + } + + static uint bc7_interp2 (uint l, uint h, uint w) + { + return (l * (64 - s_bc7_weights2[w]) + h * s_bc7_weights2[w] + 32) >> 6; + } + + static uint bc7_interp3 (uint l, uint h, uint w) + { + return (l * (64 - s_bc7_weights3[w]) + h * s_bc7_weights3[w] + 32) >> 6; + } + + static uint bc7_interp4 (uint l, uint h, uint w) + { + return (l * (64 - s_bc7_weights4[w]) + h * s_bc7_weights4[w] + 32) >> 6; + } + + static uint bc7_interp (uint l, uint h, uint w, int bits) + { + switch (bits) + { + case 2: return bc7_interp2 (l, h, w); + case 3: return bc7_interp3 (l, h, w); + case 4: return bc7_interp4 (l, h, w); + default: return 0; + } + } + + static readonly uint[] s_bc7_weights2 = { 0, 21, 43, 64 }; + static readonly uint[] s_bc7_weights3 = { 0, 9, 18, 27, 37, 46, 55, 64 }; + static readonly uint[] s_bc7_weights4 = { 0, 4, 9, 13, 17, 21, 26, 30, 34, 38, 43, 47, 51, 55, 60, 64 }; + + static readonly byte[] s_bc7_partition2 = { + 0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1, 0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1, + 0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1, 0,0,0,1,0,0,1,1,0,0,1,1,0,1,1,1, + 0,0,0,0,0,0,0,1,0,0,0,1,0,0,1,1, 0,0,1,1,0,1,1,1,0,1,1,1,1,1,1,1, + 0,0,0,1,0,0,1,1,0,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,1,0,0,1,1,0,1,1,1, + 0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1, 0,0,1,1,0,1,1,1,1,1,1,1,1,1,1,1, + 0,0,0,0,0,0,0,1,0,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,1, + 0,0,0,1,0,1,1,1,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, + 0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1, + 0,0,0,0,1,0,0,0,1,1,1,0,1,1,1,1, 0,1,1,1,0,0,0,1,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,1,0,0,0,1,1,1,0, 0,1,1,1,0,0,1,1,0,0,0,1,0,0,0,0, + 0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0, 0,0,0,0,1,0,0,0,1,1,0,0,1,1,1,0, + 0,0,0,0,0,0,0,0,1,0,0,0,1,1,0,0, 0,1,1,1,0,0,1,1,0,0,1,1,0,0,0,1, + 0,0,1,1,0,0,0,1,0,0,0,1,0,0,0,0, 0,0,0,0,1,0,0,0,1,0,0,0,1,1,0,0, + 0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0, 0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0, + 0,0,0,1,0,1,1,1,1,1,1,0,1,0,0,0, 0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0, + 0,1,1,1,0,0,0,1,1,0,0,0,1,1,1,0, 0,0,1,1,1,0,0,1,1,0,0,1,1,1,0,0, + 0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1, 0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1, + 0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0, 0,0,1,1,0,0,1,1,1,1,0,0,1,1,0,0, + 0,0,1,1,1,1,0,0,0,0,1,1,1,1,0,0, 0,1,0,1,0,1,0,1,1,0,1,0,1,0,1,0, + 0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1, 0,1,0,1,1,0,1,0,1,0,1,0,0,1,0,1, + 0,1,1,1,0,0,1,1,1,1,0,0,1,1,1,0, 0,0,0,1,0,0,1,1,1,1,0,0,1,0,0,0, + 0,0,1,1,0,0,1,0,0,1,0,0,1,1,0,0, 0,0,1,1,1,0,1,1,1,1,0,1,1,1,0,0, + 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0, 0,0,1,1,1,1,0,0,1,1,0,0,0,0,1,1, + 0,1,1,0,0,1,1,0,1,0,0,1,1,0,0,1, 0,0,0,0,0,1,1,0,0,1,1,0,0,0,0,0, + 0,1,0,0,1,1,1,0,0,1,0,0,0,0,0,0, 0,0,1,0,0,1,1,1,0,0,1,0,0,0,0,0, + 0,0,0,0,0,0,1,0,0,1,1,1,0,0,1,0, 0,0,0,0,0,1,0,0,1,1,1,0,0,1,0,0, + 0,1,1,0,1,1,0,0,1,0,0,1,0,0,1,1, 0,0,1,1,0,1,1,0,1,1,0,0,1,0,0,1, + 0,1,1,0,0,0,1,1,1,0,0,1,1,1,0,0, 0,0,1,1,1,0,0,1,1,1,0,0,0,1,1,0, + 0,1,1,0,1,1,0,0,1,1,0,0,1,0,0,1, 0,1,1,0,0,0,1,1,0,0,1,1,1,0,0,1, + 0,1,1,1,1,1,1,0,1,0,0,0,0,0,0,1, 0,0,0,1,1,0,0,0,1,1,1,0,0,1,1,1, + 0,0,0,0,1,1,1,1,0,0,1,1,0,0,1,1, 0,0,1,1,0,0,1,1,1,1,1,1,0,0,0,0, + 0,0,1,0,0,0,1,0,1,1,1,0,1,1,1,0, 0,1,0,0,0,1,0,0,0,1,1,1,0,1,1,1 + }; + + static readonly byte[] s_bc7_partition3 = { + 0,0,1,1,0,0,1,1,0,2,2,1,2,2,2,2, 0,0,0,1,0,0,1,1,2,2,1,1,2,2,2,1, + 0,0,0,0,2,0,0,1,2,2,1,1,2,2,1,1, 0,2,2,2,0,0,2,2,0,0,1,1,0,1,1,1, + 0,0,0,0,0,0,0,0,1,1,2,2,1,1,2,2, 0,0,1,1,0,0,1,1,0,0,2,2,0,0,2,2, + 0,0,2,2,0,0,2,2,1,1,1,1,1,1,1,1, 0,0,1,1,0,0,1,1,2,2,1,1,2,2,1,1, + 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2, 0,0,0,0,1,1,1,1,1,1,1,1,2,2,2,2, + 0,0,0,0,1,1,1,1,2,2,2,2,2,2,2,2, 0,0,1,2,0,0,1,2,0,0,1,2,0,0,1,2, + 0,1,1,2,0,1,1,2,0,1,1,2,0,1,1,2, 0,1,2,2,0,1,2,2,0,1,2,2,0,1,2,2, + 0,0,1,1,0,1,1,2,1,1,2,2,1,2,2,2, 0,0,1,1,2,0,0,1,2,2,0,0,2,2,2,0, + 0,0,0,1,0,0,1,1,0,1,1,2,1,1,2,2, 0,1,1,1,0,0,1,1,2,0,0,1,2,2,0,0, + 0,0,0,0,1,1,2,2,1,1,2,2,1,1,2,2, 0,0,2,2,0,0,2,2,0,0,2,2,1,1,1,1, + 0,1,1,1,0,1,1,1,0,2,2,2,0,2,2,2, 0,0,0,1,0,0,0,1,2,2,2,1,2,2,2,1, + 0,0,0,0,0,0,1,1,0,1,2,2,0,1,2,2, 0,0,0,0,1,1,0,0,2,2,1,0,2,2,1,0, + 0,1,2,2,0,1,2,2,0,0,1,1,0,0,0,0, 0,0,1,2,0,0,1,2,1,1,2,2,2,2,2,2, + 0,1,1,0,1,2,2,1,1,2,2,1,0,1,1,0, 0,0,0,0,0,1,1,0,1,2,2,1,1,2,2,1, + 0,0,2,2,1,1,0,2,1,1,0,2,0,0,2,2, 0,1,1,0,0,1,1,0,2,0,0,2,2,2,2,2, + 0,0,1,1,0,1,2,2,0,1,2,2,0,0,1,1, 0,0,0,0,2,0,0,0,2,2,1,1,2,2,2,1, + 0,0,0,0,0,0,0,2,1,1,2,2,1,2,2,2, 0,2,2,2,0,0,2,2,0,0,1,2,0,0,1,1, + 0,0,1,1,0,0,1,2,0,0,2,2,0,2,2,2, 0,1,2,0,0,1,2,0,0,1,2,0,0,1,2,0, + 0,0,0,0,1,1,1,1,2,2,2,2,0,0,0,0, 0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0, + 0,1,2,0,2,0,1,2,1,2,0,1,0,1,2,0, 0,0,1,1,2,2,0,0,1,1,2,2,0,0,1,1, + 0,0,1,1,1,1,2,2,2,2,0,0,0,0,1,1, 0,1,0,1,0,1,0,1,2,2,2,2,2,2,2,2, + 0,0,0,0,0,0,0,0,2,1,2,1,2,1,2,1, 0,0,2,2,1,1,2,2,0,0,2,2,1,1,2,2, + 0,0,2,2,0,0,1,1,0,0,2,2,0,0,1,1, 0,2,2,0,1,2,2,1,0,2,2,0,1,2,2,1, + 0,1,0,1,2,2,2,2,2,2,2,2,0,1,0,1, 0,0,0,0,2,1,2,1,2,1,2,1,2,1,2,1, + 0,1,0,1,0,1,0,1,0,1,0,1,2,2,2,2, 0,2,2,2,0,1,1,1,0,2,2,2,0,1,1,1, + 0,0,0,2,1,1,1,2,0,0,0,2,1,1,1,2, 0,0,0,0,2,1,1,2,2,1,1,2,2,1,1,2, + 0,2,2,2,0,1,1,1,0,1,1,1,0,2,2,2, 0,0,0,2,1,1,1,2,1,1,1,2,0,0,0,2, + 0,1,1,0,0,1,1,0,0,1,1,0,2,2,2,2, 0,0,0,0,0,0,0,0,2,1,1,2,2,1,1,2, + 0,1,1,0,0,1,1,0,2,2,2,2,2,2,2,2, 0,0,2,2,0,0,1,1,0,0,1,1,0,0,2,2, + 0,0,2,2,1,1,2,2,1,1,2,2,0,0,2,2, 0,0,0,0,0,0,0,0,0,0,0,0,2,1,1,2, + 0,0,0,2,0,0,0,1,0,0,0,2,0,0,0,1, 0,2,2,2,1,2,2,2,0,2,2,2,1,2,2,2, + 0,1,0,1,2,2,2,2,2,2,2,2,2,2,2,2, 0,1,1,1,2,0,1,1,2,2,0,1,2,2,2,0, + }; + + static readonly byte[] s_bc7_table_anchor_index_second_subset = { + 15,15,15,15,15,15,15,15, 15,15,15,15,15,15,15,15, + 15, 2, 8, 2, 2, 8, 8,15, 2, 8, 2, 2, 8, 8, 2, 2, + 15,15, 6, 8, 2, 8,15,15, 2, 8, 2, 2, 2,15,15, 6, + 6, 2, 6, 8,15,15, 2, 2, 15,15,15,15,15, 2, 2,15 + }; + + static readonly byte[] s_bc7_table_anchor_index_third_subset_1 = { + 3, 3,15,15, 8, 3,15,15, 8, 8, 6, 6, 6, 5, 3, 3, + 3, 3, 8,15, 3, 3, 6,10, 5, 8, 8, 6, 8, 5,15,15, + 8,15, 3, 5, 6,10, 8,15, 15, 3,15, 5,15,15,15,15, + 3,15, 5, 5, 5, 8, 5,10, 5,10, 8,13,15,12, 3, 3 + }; + + static readonly byte[] s_bc7_table_anchor_index_third_subset_2 = { + 15, 8, 8, 3,15,15, 3, 8, 15,15,15,15,15,15,15, 8, + 15, 8,15, 3,15, 8,15, 8, 3,15, 6,10,15,15,10, 8, + 15, 3,15,10,10, 8, 9,10, 6,15, 8,15, 3, 6, 6, 8, + 15, 3,15,15,15,15,15,15, 15,15,15,15, 3,15,15, 8 + }; + } +}