| /* Copyright (c) 2017-2022 Hans-Kristian Arntzen |
| * |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <mutex> |
| #include <unordered_map> |
| #include <vector> |
| |
| namespace Granite |
| { |
| |
| struct ASTCQuantizationMode |
| { |
| uint8_t bits, trits, quints; |
| }; |
| |
| // In order to decode color endpoints, we need to convert available bits and number of values |
| // into a format of (bits, trits, quints). A simple LUT texture is a reasonable approach for this. |
| // Decoders are expected to have some form of LUT to deal with this ... |
| static const ASTCQuantizationMode astc_quantization_modes[] = { |
| { 8, 0, 0 }, |
| { 6, 1, 0 }, |
| { 5, 0, 1 }, |
| { 7, 0, 0 }, |
| { 5, 1, 0 }, |
| { 4, 0, 1 }, |
| { 6, 0, 0 }, |
| { 4, 1, 0 }, |
| { 3, 0, 1 }, |
| { 5, 0, 0 }, |
| { 3, 1, 0 }, |
| { 2, 0, 1 }, |
| { 4, 0, 0 }, |
| { 2, 1, 0 }, |
| { 1, 0, 1 }, |
| { 3, 0, 0 }, |
| { 1, 1, 0 }, |
| }; |
| |
| constexpr size_t astc_num_quantization_modes = sizeof(astc_quantization_modes) / sizeof(astc_quantization_modes[0]); |
| |
| static const ASTCQuantizationMode astc_weight_modes[] = { |
| { 0, 0, 0 }, // Invalid |
| { 0, 0, 0 }, // Invalid |
| { 1, 0, 0 }, |
| { 0, 1, 0 }, |
| { 2, 0, 0 }, |
| { 0, 0, 1 }, |
| { 1, 1, 0 }, |
| { 3, 0, 0 }, |
| { 0, 0, 0 }, // Invalid |
| { 0, 0, 0 }, // Invalid |
| { 1, 0, 1 }, |
| { 2, 1, 0 }, |
| { 4, 0, 0 }, |
| { 2, 0, 1 }, |
| { 3, 1, 0 }, |
| { 5, 0, 0 }, |
| }; |
| |
| constexpr size_t astc_num_weight_modes = sizeof(astc_weight_modes) / sizeof(astc_weight_modes[0]); |
| |
| struct ASTCLutHolder |
| { |
| ASTCLutHolder(); |
| |
| void init_color_endpoint(); |
| void init_weight_luts(); |
| void init_trits_quints(); |
| |
| struct |
| { |
| size_t unquant_offset = 0; |
| uint8_t unquant_lut[2048]; |
| uint16_t lut[9][128][4]; |
| size_t unquant_lut_offsets[astc_num_quantization_modes]; |
| } color_endpoint; |
| |
| struct |
| { |
| size_t unquant_offset = 0; |
| uint8_t unquant_lut[2048]; |
| uint8_t lut[astc_num_weight_modes][4]; |
| } weights; |
| |
| struct |
| { |
| uint16_t trits_quints[256 + 128]; |
| } integer; |
| |
| struct PartitionTable |
| { |
| PartitionTable() = default; |
| PartitionTable(unsigned width, unsigned height); |
| std::vector<uint8_t> lut_buffer; |
| unsigned lut_width = 0; |
| unsigned lut_height = 0; |
| }; |
| |
| std::mutex table_lock; |
| std::unordered_map<unsigned, PartitionTable> tables; |
| |
| PartitionTable &get_partition_table(unsigned width, unsigned height); |
| }; |
| |
| ASTCLutHolder &get_astc_luts(); |
| } |