new files
diff --git a/CppProperties.json b/CppProperties.json
new file mode 100644
index 0000000..6017def
--- /dev/null
+++ b/CppProperties.json
@@ -0,0 +1,21 @@
+{
+ "configurations": [
+ {
+ "inheritEnvironments": [
+ "msvc_x64"
+ ],
+ "name": "x64-Release",
+ "includePath": [
+ "${env.INCLUDE}",
+ "${workspaceRoot}\\**"
+ ],
+ "defines": [
+ "WIN32",
+ "NDEBUG",
+ "UNICODE",
+ "_UNICODE"
+ ],
+ "intelliSenseMode": "windows-msvc-x64"
+ }
+ ]
+}
\ No newline at end of file
diff --git a/basisu_uastc_enc.cpp b/basisu_uastc_enc.cpp
new file mode 100644
index 0000000..ba5083a
--- /dev/null
+++ b/basisu_uastc_enc.cpp
@@ -0,0 +1,4090 @@
+// basisu_uastc_enc.cpp
+// Copyright (C) 2019-2020 Binomial LLC. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "basisu_uastc_enc.h"
+#include "basisu_astc_decomp.h"
+#include "basisu_gpu_texture.h"
+#include "basisu_bc7enc.h"
+
+#ifdef _DEBUG
+// When BASISU_VALIDATE_UASTC_ENC is 1, we pack and unpack to/from UASTC and ASTC, then validate that each codec returns the exact same results. This is slower.
+#define BASISU_VALIDATE_UASTC_ENC 1
+#endif
+
+#define BASISU_SUPPORT_FORCE_MODE 0
+
+using namespace basist;
+
+namespace basisu
+{
+ const uint32_t MAX_ENCODE_RESULTS = 512;
+
+#if BASISU_VALIDATE_UASTC_ENC
+ static void validate_func(bool condition, int line)
+ {
+ if (!condition)
+ {
+ fprintf(stderr, "basisu_uastc_enc: Internal validation failed on line %u!\n", line);
+ }
+ }
+
+ #define VALIDATE(c) validate_func(c, __LINE__);
+#else
+ #define VALIDATE(c)
+#endif
+
+ enum dxt_constants
+ {
+ cDXT1SelectorBits = 2U, cDXT1SelectorValues = 1U << cDXT1SelectorBits, cDXT1SelectorMask = cDXT1SelectorValues - 1U,
+ cDXT5SelectorBits = 3U, cDXT5SelectorValues = 1U << cDXT5SelectorBits, cDXT5SelectorMask = cDXT5SelectorValues - 1U,
+ };
+
+ struct dxt1_block
+ {
+ enum { cTotalEndpointBytes = 2, cTotalSelectorBytes = 4 };
+
+ uint8_t m_low_color[cTotalEndpointBytes];
+ uint8_t m_high_color[cTotalEndpointBytes];
+ uint8_t m_selectors[cTotalSelectorBytes];
+
+ inline void clear() { basisu::clear_obj(*this); }
+
+ inline uint32_t get_high_color() const { return m_high_color[0] | (m_high_color[1] << 8U); }
+ inline uint32_t get_low_color() const { return m_low_color[0] | (m_low_color[1] << 8U); }
+ inline void set_low_color(uint16_t c) { m_low_color[0] = static_cast<uint8_t>(c & 0xFF); m_low_color[1] = static_cast<uint8_t>((c >> 8) & 0xFF); }
+ inline void set_high_color(uint16_t c) { m_high_color[0] = static_cast<uint8_t>(c & 0xFF); m_high_color[1] = static_cast<uint8_t>((c >> 8) & 0xFF); }
+ inline uint32_t get_selector(uint32_t x, uint32_t y) const { assert((x < 4U) && (y < 4U)); return (m_selectors[y] >> (x * cDXT1SelectorBits))& cDXT1SelectorMask; }
+ inline void set_selector(uint32_t x, uint32_t y, uint32_t val) { assert((x < 4U) && (y < 4U) && (val < 4U)); m_selectors[y] &= (~(cDXT1SelectorMask << (x * cDXT1SelectorBits))); m_selectors[y] |= (val << (x * cDXT1SelectorBits)); }
+
+ static uint16_t pack_color(const color_rgba& color, bool scaled, uint32_t bias = 127U)
+ {
+ uint32_t r = color.r, g = color.g, b = color.b;
+ if (scaled)
+ {
+ r = (r * 31U + bias) / 255U;
+ g = (g * 63U + bias) / 255U;
+ b = (b * 31U + bias) / 255U;
+ }
+ return static_cast<uint16_t>(basisu::minimum(b, 31U) | (basisu::minimum(g, 63U) << 5U) | (basisu::minimum(r, 31U) << 11U));
+ }
+
+ static uint16_t pack_unscaled_color(uint32_t r, uint32_t g, uint32_t b) { return static_cast<uint16_t>(b | (g << 5U) | (r << 11U)); }
+ };
+
+#define UASTC_WRITE_MODE_DESCS 0
+
+ static inline void uastc_write_bits(uint8_t* pBuf, uint32_t& bit_offset, uint64_t code, uint32_t codesize, const char* pDesc)
+ {
+ (void)pDesc;
+
+#if UASTC_WRITE_MODE_DESCS
+ if (pDesc)
+ printf("%s: %u %u\n", pDesc, bit_offset, codesize);
+#endif
+
+ assert((codesize == 64) || (code < (1ULL << codesize)));
+
+ while (codesize)
+ {
+ uint32_t byte_bit_offset = bit_offset & 7;
+ uint32_t bits_to_write = basisu::minimum<int>(codesize, 8 - byte_bit_offset);
+
+ pBuf[bit_offset >> 3] |= (code << byte_bit_offset);
+
+ code >>= bits_to_write;
+ codesize -= bits_to_write;
+ bit_offset += bits_to_write;
+ }
+ }
+
+ void pack_uastc(basist::uastc_block& blk, const uastc_encode_results& result, const etc_block& etc1_blk, uint32_t etc1_bias, const eac_a8_block& etc_eac_a8_blk, bool bc1_hint0, bool bc1_hint1)
+ {
+ if ((g_uastc_mode_has_alpha[result.m_uastc_mode]) && (result.m_uastc_mode != UASTC_MODE_INDEX_SOLID_COLOR))
+ {
+ assert(etc_eac_a8_blk.m_multiplier >= 1);
+ }
+
+ uint8_t buf[32];
+ memset(buf, 0, sizeof(buf));
+
+ uint32_t block_bit_offset = 0;
+
+#if UASTC_WRITE_MODE_DESCS
+ printf("**** Mode: %u\n", result.m_uastc_mode);
+#endif
+
+ uastc_write_bits(buf, block_bit_offset, g_uastc_mode_huff_codes[result.m_uastc_mode][0], g_uastc_mode_huff_codes[result.m_uastc_mode][1], "mode");
+
+ if (result.m_uastc_mode == UASTC_MODE_INDEX_SOLID_COLOR)
+ {
+ uastc_write_bits(buf, block_bit_offset, result.m_solid_color.r, 8, "R");
+ uastc_write_bits(buf, block_bit_offset, result.m_solid_color.g, 8, "G");
+ uastc_write_bits(buf, block_bit_offset, result.m_solid_color.b, 8, "B");
+ uastc_write_bits(buf, block_bit_offset, result.m_solid_color.a, 8, "A");
+
+ uastc_write_bits(buf, block_bit_offset, etc1_blk.get_diff_bit(), 1, "ETC1D");
+ uastc_write_bits(buf, block_bit_offset, etc1_blk.get_inten_table(0), 3, "ETC1I");
+ uastc_write_bits(buf, block_bit_offset, etc1_blk.get_selector(0, 0), 2, "ETC1S");
+
+ uint32_t r, g, b;
+ if (etc1_blk.get_diff_bit())
+ etc_block::unpack_color5(r, g, b, etc1_blk.get_base5_color(), false);
+ else
+ etc_block::unpack_color4(r, g, b, etc1_blk.get_base4_color(0), false);
+
+ uastc_write_bits(buf, block_bit_offset, r, 5, "ETC1R");
+ uastc_write_bits(buf, block_bit_offset, g, 5, "ETC1G");
+ uastc_write_bits(buf, block_bit_offset, b, 5, "ETC1B");
+
+ memcpy(&blk, buf, sizeof(blk));
+ return;
+ }
+
+ if (g_uastc_mode_has_bc1_hint0[result.m_uastc_mode])
+ uastc_write_bits(buf, block_bit_offset, bc1_hint0, 1, "BC1H0");
+ else
+ {
+ assert(bc1_hint0 == false);
+ }
+
+ if (g_uastc_mode_has_bc1_hint1[result.m_uastc_mode])
+ uastc_write_bits(buf, block_bit_offset, bc1_hint1, 1, "BC1H1");
+ else
+ {
+ assert(bc1_hint1 == false);
+ }
+
+ uastc_write_bits(buf, block_bit_offset, etc1_blk.get_flip_bit(), 1, "ETC1F");
+ uastc_write_bits(buf, block_bit_offset, etc1_blk.get_diff_bit(), 1, "ETC1D");
+ uastc_write_bits(buf, block_bit_offset, etc1_blk.get_inten_table(0), 3, "ETC1I0");
+ uastc_write_bits(buf, block_bit_offset, etc1_blk.get_inten_table(1), 3, "ETC1I1");
+
+ if (g_uastc_mode_has_etc1_bias[result.m_uastc_mode])
+ uastc_write_bits(buf, block_bit_offset, etc1_bias, 5, "ETC1BIAS");
+ else
+ {
+ assert(etc1_bias == 0);
+ }
+
+ if (g_uastc_mode_has_alpha[result.m_uastc_mode])
+ {
+ const uint32_t etc2_hints = etc_eac_a8_blk.m_table | (etc_eac_a8_blk.m_multiplier << 4);
+
+ assert(etc2_hints > 0 && etc2_hints <= 0xFF);
+ uastc_write_bits(buf, block_bit_offset, etc2_hints, 8, "ETC2TM");
+ }
+
+ uint32_t subsets = 1;
+ switch (result.m_uastc_mode)
+ {
+ case 2:
+ case 4:
+ case 7:
+ case 9:
+ case 16:
+ uastc_write_bits(buf, block_bit_offset, result.m_common_pattern, 5, "PAT");
+ subsets = 2;
+ break;
+ case 3:
+ uastc_write_bits(buf, block_bit_offset, result.m_common_pattern, 4, "PAT");
+ subsets = 3;
+ break;
+ default:
+ break;
+ }
+
+#ifdef _DEBUG
+ uint32_t part_seed = 0;
+ switch (result.m_uastc_mode)
+ {
+ case 2:
+ case 4:
+ case 9:
+ case 16:
+ part_seed = g_astc_bc7_common_partitions2[result.m_common_pattern].m_astc;
+ break;
+ case 3:
+ part_seed = g_astc_bc7_common_partitions3[result.m_common_pattern].m_astc;
+ break;
+ case 7:
+ part_seed = g_bc7_3_astc2_common_partitions[result.m_common_pattern].m_astc2;
+ break;
+ default:
+ break;
+ }
+#endif
+
+ uint32_t total_planes = 1;
+ switch (result.m_uastc_mode)
+ {
+ case 6:
+ case 11:
+ case 13:
+ uastc_write_bits(buf, block_bit_offset, result.m_astc.m_ccs, 2, "COMPSEL");
+ total_planes = 2;
+ break;
+ case 17:
+ // CCS field is always 3 for dual plane LA.
+ assert(result.m_astc.m_ccs == 3);
+ total_planes = 2;
+ break;
+ default:
+ break;
+ }
+
+ uint8_t weights[32];
+ memcpy(weights, result.m_astc.m_weights, 16 * total_planes);
+
+ uint8_t endpoints[18];
+ memcpy(endpoints, result.m_astc.m_endpoints, sizeof(endpoints));
+
+ const uint32_t total_comps = g_uastc_mode_comps[result.m_uastc_mode];
+
+ // LLAA
+ // LLAA LLAA
+ // LLAA LLAA LLAA
+ // RRGGBB
+ // RRGGBB RRGGBB
+ // RRGGBB RRGGBB RRGGBB
+ // RRGGBBAA
+ // RRGGBBAA RRGGBBAA
+
+ const uint32_t weight_bits = g_uastc_mode_weight_bits[result.m_uastc_mode];
+
+ const uint8_t* pPartition_pattern;
+ const uint8_t* pSubset_anchor_indices = basist::get_anchor_indices(subsets, result.m_uastc_mode, result.m_common_pattern, pPartition_pattern);
+
+ for (uint32_t plane_index = 0; plane_index < total_planes; plane_index++)
+ {
+ for (uint32_t subset_index = 0; subset_index < subsets; subset_index++)
+ {
+ const uint32_t anchor_index = pSubset_anchor_indices[subset_index];
+
+#ifdef _DEBUG
+ if (subsets >= 2)
+ {
+ for (uint32_t i = 0; i < 16; i++)
+ {
+ const uint32_t part_index = astc_compute_texel_partition(part_seed, i & 3, i >> 2, 0, subsets, true);
+ if (part_index == subset_index)
+ {
+ assert(anchor_index == i);
+ break;
+ }
+ }
+ }
+ else
+ {
+ assert(!anchor_index);
+ }
+#endif
+
+ // Check anchor weight's MSB - if it's set then invert this subset's weights and swap the endpoints
+ if (weights[anchor_index * total_planes + plane_index] & (1 << (weight_bits - 1)))
+ {
+ for (uint32_t i = 0; i < 16; i++)
+ {
+ const uint32_t part_index = pPartition_pattern[i];
+
+#ifdef _DEBUG
+ if (subsets >= 2)
+ {
+ assert(part_index == (uint32_t)astc_compute_texel_partition(part_seed, i & 3, i >> 2, 0, subsets, true));
+ }
+ else
+ {
+ assert(!part_index);
+ }
+#endif
+
+ if (part_index == subset_index)
+ weights[i * total_planes + plane_index] = ((1 << weight_bits) - 1) - weights[i * total_planes + plane_index];
+ }
+
+ if (total_planes == 2)
+ {
+ for (int c = 0; c < (int)total_comps; c++)
+ {
+ const uint32_t comp_plane = (total_comps == 2) ? c : ((c == result.m_astc.m_ccs) ? 1 : 0);
+
+ if (comp_plane == plane_index)
+ std::swap(endpoints[c * 2 + 0], endpoints[c * 2 + 1]);
+ }
+ }
+ else
+ {
+ for (uint32_t c = 0; c < total_comps; c++)
+ std::swap(endpoints[subset_index * total_comps * 2 + c * 2 + 0], endpoints[subset_index * total_comps * 2 + c * 2 + 1]);
+ }
+ }
+ } // subset_index
+ } // plane_index
+
+ const uint32_t total_values = total_comps * 2 * subsets;
+ const uint32_t endpoint_range = g_uastc_mode_endpoint_ranges[result.m_uastc_mode];
+
+ uint32_t bit_values[18];
+ uint32_t tq_values[8];
+ uint32_t total_tq_values = 0;
+ uint32_t tq_accum = 0;
+ uint32_t tq_mul = 1;
+
+ const uint32_t ep_bits = g_astc_bise_range_table[endpoint_range][0];
+ const uint32_t ep_trits = g_astc_bise_range_table[endpoint_range][1];
+ const uint32_t ep_quints = g_astc_bise_range_table[endpoint_range][2];
+
+ for (uint32_t i = 0; i < total_values; i++)
+ {
+ uint32_t val = endpoints[i];
+
+ uint32_t bits = val & ((1 << ep_bits) - 1);
+ uint32_t tq = val >> ep_bits;
+
+ bit_values[i] = bits;
+
+ if (ep_trits)
+ {
+ assert(tq < 3);
+ tq_accum += tq * tq_mul;
+ tq_mul *= 3;
+ if (tq_mul == 243)
+ {
+ tq_values[total_tq_values++] = tq_accum;
+ tq_accum = 0;
+ tq_mul = 1;
+ }
+ }
+ else if (ep_quints)
+ {
+ assert(tq < 5);
+ tq_accum += tq * tq_mul;
+ tq_mul *= 5;
+ if (tq_mul == 125)
+ {
+ tq_values[total_tq_values++] = tq_accum;
+ tq_accum = 0;
+ tq_mul = 1;
+ }
+ }
+ }
+
+ uint32_t total_endpoint_bits = 0;
+
+ for (uint32_t i = 0; i < total_tq_values; i++)
+ {
+ const uint32_t num_bits = ep_trits ? 8 : 7;
+ uastc_write_bits(buf, block_bit_offset, tq_values[i], num_bits, "ETQ");
+ total_endpoint_bits += num_bits;
+ }
+
+ if (tq_mul > 1)
+ {
+ uint32_t num_bits;
+ if (ep_trits)
+ {
+ if (tq_mul == 3)
+ num_bits = 2;
+ else if (tq_mul == 9)
+ num_bits = 4;
+ else if (tq_mul == 27)
+ num_bits = 5;
+ else //if (tq_mul == 81)
+ num_bits = 7;
+ }
+ else
+ {
+ if (tq_mul == 5)
+ num_bits = 3;
+ else //if (tq_mul == 25)
+ num_bits = 5;
+ }
+ uastc_write_bits(buf, block_bit_offset, tq_accum, num_bits, "ETQ");
+ total_endpoint_bits += num_bits;
+ }
+
+ for (uint32_t i = 0; i < total_values; i++)
+ {
+ uastc_write_bits(buf, block_bit_offset, bit_values[i], ep_bits, "EBITS");
+ total_endpoint_bits += ep_bits;
+ }
+
+#if UASTC_WRITE_MODE_DESCS
+ uint32_t weight_start = block_bit_offset;
+#endif
+
+ uint32_t total_weight_bits = 0;
+ const uint32_t plane_shift = (total_planes == 2) ? 1 : 0;
+ for (uint32_t i = 0; i < 16 * total_planes; i++)
+ {
+ uint32_t numbits = weight_bits;
+ for (uint32_t s = 0; s < subsets; s++)
+ {
+ if (pSubset_anchor_indices[s] == (i >> plane_shift))
+ {
+ numbits--;
+ break;
+ }
+ }
+
+ uastc_write_bits(buf, block_bit_offset, weights[i], numbits, nullptr);
+
+ total_weight_bits += numbits;
+ }
+
+#if UASTC_WRITE_MODE_DESCS
+ printf("WEIGHTS: %u %u\n", weight_start, total_weight_bits);
+#endif
+
+ assert(block_bit_offset <= 128);
+ memcpy(&blk, buf, sizeof(blk));
+
+#if UASTC_WRITE_MODE_DESCS
+ printf("Total bits: %u, endpoint bits: %u, weight bits: %u\n", block_bit_offset, total_endpoint_bits, total_weight_bits);
+#endif
+ }
+
+ // MODE 0
+ // 0. DualPlane: 0, WeightRange: 8 (16), Subsets: 1, CEM: 8 (RGB Direct ), EndpointRange: 19 (192) MODE6 RGB
+ // 18. DualPlane: 0, WeightRange: 11 (32), Subsets: 1, CEM: 8 (RGB Direct ), EndpointRange: 11 (32) MODE6 RGB
+ static void astc_mode0_or_18(uint32_t mode, const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params, const uint8_t *pForce_selectors = nullptr)
+ {
+ const uint32_t endpoint_range = (mode == 18) ? 11 : 19;
+ const uint32_t weight_range = (mode == 18) ? 11 : 8;
+
+ color_cell_compressor_params ccell_params;
+ memset(&ccell_params, 0, sizeof(ccell_params));
+
+ ccell_params.m_num_pixels = 16;
+ ccell_params.m_pPixels = (color_quad_u8*)&block[0][0];
+ ccell_params.m_num_selector_weights = (mode == 18) ? 32 : 16;
+ ccell_params.m_pSelector_weights = (mode == 18) ? g_astc_weights5 : g_astc_weights4;
+ ccell_params.m_pSelector_weightsx = (mode == 18) ? (const bc7enc_vec4F*)g_astc_weights5x : (const bc7enc_vec4F*)g_astc_weights4x;
+ ccell_params.m_astc_endpoint_range = endpoint_range;
+ ccell_params.m_weights[0] = 1;
+ ccell_params.m_weights[1] = 1;
+ ccell_params.m_weights[2] = 1;
+ ccell_params.m_weights[3] = 1;
+ ccell_params.m_pForce_selectors = pForce_selectors;
+
+ color_cell_compressor_results ccell_results;
+ uint8_t ccell_result_selectors[16];
+ uint8_t ccell_result_selectors_temp[16];
+ memset(&ccell_results, 0, sizeof(ccell_results));
+ ccell_results.m_pSelectors = &ccell_result_selectors[0];
+ ccell_results.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params, &ccell_results, &comp_params);
+
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = weight_range;// (mode == 18) ? 11 : 8;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 1;
+ astc_results.m_partition_seed = 0;
+ astc_results.m_cem = 8;
+
+ astc_results.m_endpoints[0] = ccell_results.m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[1] = ccell_results.m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[2] = ccell_results.m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[3] = ccell_results.m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[4] = ccell_results.m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[5] = ccell_results.m_astc_high_endpoint.m_c[2];
+
+ bool invert = false;
+
+ if (pForce_selectors == nullptr)
+ {
+ int s0 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0], astc_results.m_endpoints[1]);
+ std::swap(astc_results.m_endpoints[2], astc_results.m_endpoints[3]);
+ std::swap(astc_results.m_endpoints[4], astc_results.m_endpoints[5]);
+ invert = true;
+ }
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[x + y * 4];
+
+ if (invert)
+ astc_results.m_weights[x + y * 4] = ((mode == 18) ? 31 : 15) - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = mode;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = part_err;
+ total_results++;
+ }
+ }
+
+ // MODE 1
+ // 1-subset, 2-bit indices, 8-bit endpoints, BC7 mode 3
+ // DualPlane: 0, WeightRange: 2 (4), Subsets: 1, CEM: 8 (RGB Direct ), EndpointRange: 20 (256) MODE3 or MODE5 RGB
+ static void astc_mode1(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ color_cell_compressor_params ccell_params;
+ memset(&ccell_params, 0, sizeof(ccell_params));
+
+ ccell_params.m_num_pixels = 16;
+ ccell_params.m_pPixels = (color_quad_u8*)&block[0][0];
+ ccell_params.m_num_selector_weights = 4;
+ ccell_params.m_pSelector_weights = g_bc7_weights2;
+ ccell_params.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params.m_astc_endpoint_range = 20;
+ ccell_params.m_weights[0] = 1;
+ ccell_params.m_weights[1] = 1;
+ ccell_params.m_weights[2] = 1;
+ ccell_params.m_weights[3] = 1;
+
+ color_cell_compressor_results ccell_results;
+ uint8_t ccell_result_selectors[16];
+ uint8_t ccell_result_selectors_temp[16];
+ memset(&ccell_results, 0, sizeof(ccell_results));
+ ccell_results.m_pSelectors = &ccell_result_selectors[0];
+ ccell_results.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params, &ccell_results, &comp_params);
+
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = 2;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 1;
+ astc_results.m_partition_seed = 0;
+ astc_results.m_cem = 8;
+
+ astc_results.m_endpoints[0] = ccell_results.m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[1] = ccell_results.m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[2] = ccell_results.m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[3] = ccell_results.m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[4] = ccell_results.m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[5] = ccell_results.m_astc_high_endpoint.m_c[2];
+
+ const uint32_t range = 20;
+
+ bool invert = false;
+
+ int s0 = g_astc_unquant[range][astc_results.m_endpoints[0]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[2]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[range][astc_results.m_endpoints[1]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[3]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0], astc_results.m_endpoints[1]);
+ std::swap(astc_results.m_endpoints[2], astc_results.m_endpoints[3]);
+ std::swap(astc_results.m_endpoints[4], astc_results.m_endpoints[5]);
+ invert = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[x + y * 4];
+
+ if (invert)
+ astc_results.m_weights[x + y * 4] = 3 - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 1;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = part_err;
+ total_results++;
+ }
+ }
+
+ static uint32_t estimate_partition2(uint32_t num_weights, uint32_t num_comps, const uint32_t* pWeights, const color_rgba block[4][4], const uint32_t weights[4])
+ {
+ assert(pWeights[0] == 0 && pWeights[num_weights - 1] == 64);
+
+ uint64_t best_err = UINT64_MAX;
+ uint32_t best_common_pattern = 0;
+
+ for (uint32_t common_pattern = 0; common_pattern < TOTAL_ASTC_BC7_COMMON_PARTITIONS2; common_pattern++)
+ {
+ const uint32_t bc7_pattern = g_astc_bc7_common_partitions2[common_pattern].m_bc7;
+
+ const uint8_t* pPartition = &g_bc7_partition2[bc7_pattern * 16];
+
+ color_quad_u8 subset_colors[2][16];
+ uint32_t subset_total_colors[2] = { 0, 0 };
+ for (uint32_t index = 0; index < 16; index++)
+ subset_colors[pPartition[index]][subset_total_colors[pPartition[index]]++] = ((const color_quad_u8*)block)[index];
+
+ uint64_t total_subset_err = 0;
+ for (uint32_t subset = 0; (subset < 2) && (total_subset_err < best_err); subset++)
+ total_subset_err += color_cell_compression_est_astc(num_weights, num_comps, pWeights, subset_total_colors[subset], &subset_colors[subset][0], best_err, weights);
+
+ if (total_subset_err < best_err)
+ {
+ best_err = total_subset_err;
+ best_common_pattern = common_pattern;
+ }
+ }
+
+ return best_common_pattern;
+ }
+
+ // MODE 2
+ // 2-subset, 3-bit indices, 4-bit endpoints, BC7 mode 1
+ // DualPlane: 0, WeightRange: 5 (8), Subsets: 2, CEM: 8 (RGB Direct ), EndpointRange: 8 (16) MODE1
+ static void astc_mode2(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params, bool estimate_partition)
+ {
+ uint32_t first_common_pattern = 0;
+ uint32_t last_common_pattern = TOTAL_ASTC_BC7_COMMON_PARTITIONS2;
+
+ if (estimate_partition)
+ {
+ const uint32_t weights[4] = { 1, 1, 1, 1 };
+ first_common_pattern = estimate_partition2(8, 3, g_bc7_weights3, block, weights);
+ last_common_pattern = first_common_pattern + 1;
+ }
+
+ for (uint32_t common_pattern = first_common_pattern; common_pattern < last_common_pattern; common_pattern++)
+ {
+ const uint32_t bc7_pattern = g_astc_bc7_common_partitions2[common_pattern].m_bc7;
+
+ color_rgba part_pixels[2][16];
+ uint32_t part_pixel_index[4][4];
+ uint32_t num_part_pixels[2] = { 0, 0 };
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t part = g_bc7_partition2[16 * bc7_pattern + x + y * 4];
+ part_pixel_index[y][x] = num_part_pixels[part];
+ part_pixels[part][num_part_pixels[part]++] = block[y][x];
+ }
+ }
+
+ color_cell_compressor_params ccell_params[2];
+ color_cell_compressor_results ccell_results[2];
+ uint8_t ccell_result_selectors[2][16];
+ uint8_t ccell_result_selectors_temp[2][16];
+
+ uint64_t total_part_err = 0;
+ for (uint32_t part = 0; part < 2; part++)
+ {
+ memset(&ccell_params[part], 0, sizeof(ccell_params[part]));
+
+ ccell_params[part].m_num_pixels = num_part_pixels[part];
+ ccell_params[part].m_pPixels = (color_quad_u8*)&part_pixels[part][0];
+ ccell_params[part].m_num_selector_weights = 8;
+ ccell_params[part].m_pSelector_weights = g_bc7_weights3;
+ ccell_params[part].m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights3x;
+ ccell_params[part].m_astc_endpoint_range = 8;
+ ccell_params[part].m_weights[0] = 1;
+ ccell_params[part].m_weights[1] = 1;
+ ccell_params[part].m_weights[2] = 1;
+ ccell_params[part].m_weights[3] = 1;
+
+ memset(&ccell_results[part], 0, sizeof(ccell_results[part]));
+ ccell_results[part].m_pSelectors = &ccell_result_selectors[part][0];
+ ccell_results[part].m_pSelectors_temp = &ccell_result_selectors_temp[part][0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params[part], &ccell_results[part], &comp_params);
+ total_part_err += part_err;
+ } // part
+
+ {
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = 5;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 2;
+ astc_results.m_partition_seed = g_astc_bc7_common_partitions2[common_pattern].m_astc;
+ astc_results.m_cem = 8;
+
+ uint32_t p0 = 0;
+ uint32_t p1 = 1;
+ if (g_astc_bc7_common_partitions2[common_pattern].m_invert)
+ std::swap(p0, p1);
+
+ astc_results.m_endpoints[0] = ccell_results[p0].m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[1] = ccell_results[p0].m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[2] = ccell_results[p0].m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[3] = ccell_results[p0].m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[4] = ccell_results[p0].m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[5] = ccell_results[p0].m_astc_high_endpoint.m_c[2];
+
+ const uint32_t range = 8;
+
+ bool invert[2] = { false, false };
+
+ int s0 = g_astc_unquant[range][astc_results.m_endpoints[0]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[2]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[range][astc_results.m_endpoints[1]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[3]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0], astc_results.m_endpoints[1]);
+ std::swap(astc_results.m_endpoints[2], astc_results.m_endpoints[3]);
+ std::swap(astc_results.m_endpoints[4], astc_results.m_endpoints[5]);
+ invert[0] = true;
+ }
+
+ astc_results.m_endpoints[6] = ccell_results[p1].m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[7] = ccell_results[p1].m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[8] = ccell_results[p1].m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[9] = ccell_results[p1].m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[10] = ccell_results[p1].m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[11] = ccell_results[p1].m_astc_high_endpoint.m_c[2];
+
+ s0 = g_astc_unquant[range][astc_results.m_endpoints[0 + 6]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[2 + 6]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[4 + 6]].m_unquant;
+ s1 = g_astc_unquant[range][astc_results.m_endpoints[1 + 6]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[3 + 6]].m_unquant + g_astc_unquant[range][astc_results.m_endpoints[5 + 6]].m_unquant;
+
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0 + 6], astc_results.m_endpoints[1 + 6]);
+ std::swap(astc_results.m_endpoints[2 + 6], astc_results.m_endpoints[3 + 6]);
+ std::swap(astc_results.m_endpoints[4 + 6], astc_results.m_endpoints[5 + 6]);
+ invert[1] = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t bc7_part = g_bc7_partition2[16 * bc7_pattern + x + y * 4];
+
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[bc7_part][part_pixel_index[y][x]];
+
+ uint32_t astc_part = bc7_part;
+ if (g_astc_bc7_common_partitions2[common_pattern].m_invert)
+ astc_part = 1 - astc_part;
+
+ if (invert[astc_part])
+ astc_results.m_weights[x + y * 4] = 7 - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 2;
+ pResults[total_results].m_common_pattern = common_pattern;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = total_part_err;
+ total_results++;
+ }
+ }
+
+ } // common_pattern
+ }
+
+ // MODE 3
+ // 3-subsets, 2-bit indices, [0,11] endpoints, BC7 mode 2
+ // DualPlane: 0, WeightRange: 2 (4), Subsets: 3, CEM: 8 (RGB Direct ), EndpointRange: 7 (12) MODE2
+ static void astc_mode3(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params, bool estimate_partition)
+ {
+ uint32_t first_common_pattern = 0;
+ uint32_t last_common_pattern = TOTAL_ASTC_BC7_COMMON_PARTITIONS3;
+
+ if (estimate_partition)
+ {
+ uint64_t best_err = UINT64_MAX;
+ uint32_t best_common_pattern = 0;
+ const uint32_t weights[4] = { 1, 1, 1, 1 };
+
+ for (uint32_t common_pattern = 0; common_pattern < TOTAL_ASTC_BC7_COMMON_PARTITIONS3; common_pattern++)
+ {
+ const uint32_t bc7_pattern = g_astc_bc7_common_partitions3[common_pattern].m_bc7;
+
+ const uint8_t* pPartition = &g_bc7_partition3[bc7_pattern * 16];
+
+ color_quad_u8 subset_colors[3][16];
+ uint32_t subset_total_colors[3] = { 0, 0 };
+ for (uint32_t index = 0; index < 16; index++)
+ subset_colors[pPartition[index]][subset_total_colors[pPartition[index]]++] = ((const color_quad_u8*)block)[index];
+
+ uint64_t total_subset_err = 0;
+ for (uint32_t subset = 0; (subset < 3) && (total_subset_err < best_err); subset++)
+ total_subset_err += color_cell_compression_est_astc(4, 3, g_bc7_weights2, subset_total_colors[subset], &subset_colors[subset][0], best_err, weights);
+
+ if (total_subset_err < best_err)
+ {
+ best_err = total_subset_err;
+ best_common_pattern = common_pattern;
+ }
+ }
+
+ first_common_pattern = best_common_pattern;
+ last_common_pattern = best_common_pattern + 1;
+ }
+
+ for (uint32_t common_pattern = first_common_pattern; common_pattern < last_common_pattern; common_pattern++)
+ {
+ const uint32_t endpoint_range = 7;
+
+ const uint32_t bc7_pattern = g_astc_bc7_common_partitions3[common_pattern].m_bc7;
+
+ color_rgba part_pixels[3][16];
+ uint32_t part_pixel_index[4][4];
+ uint32_t num_part_pixels[3] = { 0, 0, 0 };
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t bc7_part = g_bc7_partition3[16 * bc7_pattern + x + y * 4];
+ part_pixel_index[y][x] = num_part_pixels[bc7_part];
+ part_pixels[bc7_part][num_part_pixels[bc7_part]++] = block[y][x];
+ }
+ }
+
+ color_cell_compressor_params ccell_params[3];
+ color_cell_compressor_results ccell_results[3];
+ uint8_t ccell_result_selectors[3][16];
+ uint8_t ccell_result_selectors_temp[3][16];
+
+ uint64_t total_part_err = 0;
+ for (uint32_t bc7_part = 0; bc7_part < 3; bc7_part++)
+ {
+ memset(&ccell_params[bc7_part], 0, sizeof(ccell_params[bc7_part]));
+
+ ccell_params[bc7_part].m_num_pixels = num_part_pixels[bc7_part];
+ ccell_params[bc7_part].m_pPixels = (color_quad_u8*)&part_pixels[bc7_part][0];
+ ccell_params[bc7_part].m_num_selector_weights = 4;
+ ccell_params[bc7_part].m_pSelector_weights = g_bc7_weights2;
+ ccell_params[bc7_part].m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params[bc7_part].m_astc_endpoint_range = endpoint_range;
+ ccell_params[bc7_part].m_weights[0] = 1;
+ ccell_params[bc7_part].m_weights[1] = 1;
+ ccell_params[bc7_part].m_weights[2] = 1;
+ ccell_params[bc7_part].m_weights[3] = 1;
+
+ memset(&ccell_results[bc7_part], 0, sizeof(ccell_results[bc7_part]));
+ ccell_results[bc7_part].m_pSelectors = &ccell_result_selectors[bc7_part][0];
+ ccell_results[bc7_part].m_pSelectors_temp = &ccell_result_selectors_temp[bc7_part][0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params[bc7_part], &ccell_results[bc7_part], &comp_params);
+ total_part_err += part_err;
+ } // part
+
+ {
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = 2;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 3;
+ astc_results.m_partition_seed = g_astc_bc7_common_partitions3[common_pattern].m_astc;
+ astc_results.m_cem = 8;
+
+ uint32_t astc_to_bc7_part[3]; // converts ASTC to BC7 partition index
+ const uint32_t perm = g_astc_bc7_common_partitions3[common_pattern].m_astc_to_bc7_perm;
+ astc_to_bc7_part[0] = g_astc_to_bc7_partition_index_perm_tables[perm][0];
+ astc_to_bc7_part[1] = g_astc_to_bc7_partition_index_perm_tables[perm][1];
+ astc_to_bc7_part[2] = g_astc_to_bc7_partition_index_perm_tables[perm][2];
+
+ bool invert_astc_part[3] = { false, false, false };
+
+ for (uint32_t astc_part = 0; astc_part < 3; astc_part++)
+ {
+ uint8_t* pEndpoints = &astc_results.m_endpoints[6 * astc_part];
+
+ pEndpoints[0] = ccell_results[astc_to_bc7_part[astc_part]].m_astc_low_endpoint.m_c[0];
+ pEndpoints[1] = ccell_results[astc_to_bc7_part[astc_part]].m_astc_high_endpoint.m_c[0];
+ pEndpoints[2] = ccell_results[astc_to_bc7_part[astc_part]].m_astc_low_endpoint.m_c[1];
+ pEndpoints[3] = ccell_results[astc_to_bc7_part[astc_part]].m_astc_high_endpoint.m_c[1];
+ pEndpoints[4] = ccell_results[astc_to_bc7_part[astc_part]].m_astc_low_endpoint.m_c[2];
+ pEndpoints[5] = ccell_results[astc_to_bc7_part[astc_part]].m_astc_high_endpoint.m_c[2];
+
+ int s0 = g_astc_unquant[endpoint_range][pEndpoints[0]].m_unquant + g_astc_unquant[endpoint_range][pEndpoints[2]].m_unquant + g_astc_unquant[endpoint_range][pEndpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][pEndpoints[1]].m_unquant + g_astc_unquant[endpoint_range][pEndpoints[3]].m_unquant + g_astc_unquant[endpoint_range][pEndpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(pEndpoints[0], pEndpoints[1]);
+ std::swap(pEndpoints[2], pEndpoints[3]);
+ std::swap(pEndpoints[4], pEndpoints[5]);
+ invert_astc_part[astc_part] = true;
+ }
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t bc7_part = g_bc7_partition3[16 * bc7_pattern + x + y * 4];
+
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[bc7_part][part_pixel_index[y][x]];
+
+ uint32_t astc_part = 0;
+ for (uint32_t i = 0; i < 3; i++)
+ {
+ if (astc_to_bc7_part[i] == bc7_part)
+ {
+ astc_part = i;
+ break;
+ }
+ }
+
+ if (invert_astc_part[astc_part])
+ astc_results.m_weights[x + y * 4] = 3 - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 3;
+ pResults[total_results].m_common_pattern = common_pattern;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = total_part_err;
+ total_results++;
+ }
+
+ }
+
+ } // common_pattern
+ }
+
+ // MODE 4
+ // DualPlane: 0, WeightRange: 2 (4), Subsets: 2, CEM: 8 (RGB Direct ), EndpointRange: 12 (40) MODE3
+ static void astc_mode4(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params, bool estimate_partition)
+ {
+ //const uint32_t weight_range = 2;
+ const uint32_t endpoint_range = 12;
+
+ uint32_t first_common_pattern = 0;
+ uint32_t last_common_pattern = TOTAL_ASTC_BC7_COMMON_PARTITIONS2;
+
+ if (estimate_partition)
+ {
+ const uint32_t weights[4] = { 1, 1, 1, 1 };
+ first_common_pattern = estimate_partition2(4, 3, g_bc7_weights2, block, weights);
+ last_common_pattern = first_common_pattern + 1;
+ }
+
+ for (uint32_t common_pattern = first_common_pattern; common_pattern < last_common_pattern; common_pattern++)
+ {
+ const uint32_t bc7_pattern = g_astc_bc7_common_partitions2[common_pattern].m_bc7;
+
+ color_rgba part_pixels[2][16];
+ uint32_t part_pixel_index[4][4];
+ uint32_t num_part_pixels[2] = { 0, 0 };
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t part = g_bc7_partition2[16 * bc7_pattern + x + y * 4];
+ part_pixel_index[y][x] = num_part_pixels[part];
+ part_pixels[part][num_part_pixels[part]++] = block[y][x];
+ }
+ }
+
+ color_cell_compressor_params ccell_params[2];
+ color_cell_compressor_results ccell_results[2];
+ uint8_t ccell_result_selectors[2][16];
+ uint8_t ccell_result_selectors_temp[2][16];
+
+ uint64_t total_part_err = 0;
+ for (uint32_t part = 0; part < 2; part++)
+ {
+ memset(&ccell_params[part], 0, sizeof(ccell_params[part]));
+
+ ccell_params[part].m_num_pixels = num_part_pixels[part];
+ ccell_params[part].m_pPixels = (color_quad_u8*)&part_pixels[part][0];
+ ccell_params[part].m_num_selector_weights = 4;
+ ccell_params[part].m_pSelector_weights = g_bc7_weights2;
+ ccell_params[part].m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params[part].m_astc_endpoint_range = endpoint_range;
+ ccell_params[part].m_weights[0] = 1;
+ ccell_params[part].m_weights[1] = 1;
+ ccell_params[part].m_weights[2] = 1;
+ ccell_params[part].m_weights[3] = 1;
+
+ memset(&ccell_results[part], 0, sizeof(ccell_results[part]));
+ ccell_results[part].m_pSelectors = &ccell_result_selectors[part][0];
+ ccell_results[part].m_pSelectors_temp = &ccell_result_selectors_temp[part][0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params[part], &ccell_results[part], &comp_params);
+ total_part_err += part_err;
+ } // part
+
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = 2;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 2;
+ astc_results.m_partition_seed = g_astc_bc7_common_partitions2[common_pattern].m_astc;
+ astc_results.m_cem = 8;
+
+ uint32_t p0 = 0;
+ uint32_t p1 = 1;
+ if (g_astc_bc7_common_partitions2[common_pattern].m_invert)
+ std::swap(p0, p1);
+
+ astc_results.m_endpoints[0] = ccell_results[p0].m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[1] = ccell_results[p0].m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[2] = ccell_results[p0].m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[3] = ccell_results[p0].m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[4] = ccell_results[p0].m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[5] = ccell_results[p0].m_astc_high_endpoint.m_c[2];
+
+ bool invert[2] = { false, false };
+
+ int s0 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0], astc_results.m_endpoints[1]);
+ std::swap(astc_results.m_endpoints[2], astc_results.m_endpoints[3]);
+ std::swap(astc_results.m_endpoints[4], astc_results.m_endpoints[5]);
+ invert[0] = true;
+ }
+
+ astc_results.m_endpoints[6] = ccell_results[p1].m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[7] = ccell_results[p1].m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[8] = ccell_results[p1].m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[9] = ccell_results[p1].m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[10] = ccell_results[p1].m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[11] = ccell_results[p1].m_astc_high_endpoint.m_c[2];
+
+ s0 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[0 + 6]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[2 + 6]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[4 + 6]].m_unquant;
+ s1 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[1 + 6]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[3 + 6]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[5 + 6]].m_unquant;
+
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0 + 6], astc_results.m_endpoints[1 + 6]);
+ std::swap(astc_results.m_endpoints[2 + 6], astc_results.m_endpoints[3 + 6]);
+ std::swap(astc_results.m_endpoints[4 + 6], astc_results.m_endpoints[5 + 6]);
+ invert[1] = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t bc7_part = g_bc7_partition2[16 * bc7_pattern + x + y * 4];
+
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[bc7_part][part_pixel_index[y][x]];
+
+ uint32_t astc_part = bc7_part;
+ if (g_astc_bc7_common_partitions2[common_pattern].m_invert)
+ astc_part = 1 - astc_part;
+
+ if (invert[astc_part])
+ astc_results.m_weights[x + y * 4] = 3 - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 4;
+ pResults[total_results].m_common_pattern = common_pattern;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = total_part_err;
+ total_results++;
+ }
+
+ } // common_pattern
+ }
+
+ // MODE 5
+ // DualPlane: 0, WeightRange: 5 (8), Subsets: 1, CEM: 8 (RGB Direct ), EndpointRange: 20 (256) BC7 MODE 6 (or MODE 1 1-subset)
+ static void astc_mode5(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ const uint32_t weight_range = 5;
+ const uint32_t endpoint_range = 20;
+
+ color_cell_compressor_params ccell_params;
+ memset(&ccell_params, 0, sizeof(ccell_params));
+
+ ccell_params.m_num_pixels = 16;
+ ccell_params.m_pPixels = (color_quad_u8*)&block[0][0];
+ ccell_params.m_num_selector_weights = 8;
+ ccell_params.m_pSelector_weights = g_bc7_weights3;
+ ccell_params.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights3x;
+ ccell_params.m_astc_endpoint_range = endpoint_range;
+ ccell_params.m_weights[0] = 1;
+ ccell_params.m_weights[1] = 1;
+ ccell_params.m_weights[2] = 1;
+ ccell_params.m_weights[3] = 1;
+
+ color_cell_compressor_results ccell_results;
+ uint8_t ccell_result_selectors[16];
+ uint8_t ccell_result_selectors_temp[16];
+ memset(&ccell_results, 0, sizeof(ccell_results));
+ ccell_results.m_pSelectors = &ccell_result_selectors[0];
+ ccell_results.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params, &ccell_results, &comp_params);
+
+ // ASTC
+ astc_block_desc blk;
+ memset(&blk, 0, sizeof(blk));
+
+ blk.m_dual_plane = false;
+ blk.m_weight_range = weight_range;
+
+ blk.m_ccs = 0;
+ blk.m_subsets = 1;
+ blk.m_partition_seed = 0;
+ blk.m_cem = 8;
+
+ blk.m_endpoints[0] = ccell_results.m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[1] = ccell_results.m_astc_high_endpoint.m_c[0];
+ blk.m_endpoints[2] = ccell_results.m_astc_low_endpoint.m_c[1];
+ blk.m_endpoints[3] = ccell_results.m_astc_high_endpoint.m_c[1];
+ blk.m_endpoints[4] = ccell_results.m_astc_low_endpoint.m_c[2];
+ blk.m_endpoints[5] = ccell_results.m_astc_high_endpoint.m_c[2];
+
+ bool invert = false;
+
+ int s0 = g_astc_unquant[endpoint_range][blk.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][blk.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(blk.m_endpoints[0], blk.m_endpoints[1]);
+ std::swap(blk.m_endpoints[2], blk.m_endpoints[3]);
+ std::swap(blk.m_endpoints[4], blk.m_endpoints[5]);
+ invert = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ blk.m_weights[x + y * 4] = ccell_result_selectors[x + y * 4];
+
+ if (invert)
+ blk.m_weights[x + y * 4] = 7 - blk.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 5;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = blk;
+ pResults[total_results].m_astc_err = part_err;
+ total_results++;
+ }
+ }
+
+ // MODE 6
+ // DualPlane: 1, WeightRange: 2 (4), Subsets: 1, CEM: 8 (RGB Direct ), EndpointRange: 18 (160) BC7 MODE5
+ static void astc_mode6(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ for (uint32_t rot_comp = 0; rot_comp < 3; rot_comp++)
+ {
+ const uint32_t weight_range = 2;
+ const uint32_t endpoint_range = 18;
+
+ color_quad_u8 block_rgb[16];
+ color_quad_u8 block_a[16];
+ for (uint32_t i = 0; i < 16; i++)
+ {
+ block_rgb[i] = ((color_quad_u8*)&block[0][0])[i];
+ block_a[i] = block_rgb[i];
+
+ uint8_t c = block_a[i].m_c[rot_comp];
+ block_a[i].m_c[0] = c;
+ block_a[i].m_c[1] = c;
+ block_a[i].m_c[2] = c;
+ block_a[i].m_c[3] = 255;
+
+ block_rgb[i].m_c[rot_comp] = 255;
+ }
+
+ uint8_t ccell_result_selectors_temp[16];
+
+ color_cell_compressor_params ccell_params_rgb;
+ memset(&ccell_params_rgb, 0, sizeof(ccell_params_rgb));
+
+ ccell_params_rgb.m_num_pixels = 16;
+ ccell_params_rgb.m_pPixels = block_rgb;
+ ccell_params_rgb.m_num_selector_weights = 4;
+ ccell_params_rgb.m_pSelector_weights = g_bc7_weights2;
+ ccell_params_rgb.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params_rgb.m_astc_endpoint_range = endpoint_range;
+ ccell_params_rgb.m_weights[0] = 1;
+ ccell_params_rgb.m_weights[1] = 1;
+ ccell_params_rgb.m_weights[2] = 1;
+ ccell_params_rgb.m_weights[3] = 1;
+
+ color_cell_compressor_results ccell_results_rgb;
+ uint8_t ccell_result_selectors_rgb[16];
+ memset(&ccell_results_rgb, 0, sizeof(ccell_results_rgb));
+ ccell_results_rgb.m_pSelectors = &ccell_result_selectors_rgb[0];
+ ccell_results_rgb.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err_rgb = color_cell_compression(255, &ccell_params_rgb, &ccell_results_rgb, &comp_params);
+ assert(ccell_results_rgb.m_low_endpoint.m_c[rot_comp] == ccell_results_rgb.m_high_endpoint.m_c[rot_comp]);
+
+ color_cell_compressor_params ccell_params_a;
+ memset(&ccell_params_a, 0, sizeof(ccell_params_a));
+
+ ccell_params_a.m_num_pixels = 16;
+ ccell_params_a.m_pPixels = block_a;
+ ccell_params_a.m_num_selector_weights = 4;
+ ccell_params_a.m_pSelector_weights = g_bc7_weights2;
+ ccell_params_a.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params_a.m_astc_endpoint_range = endpoint_range;
+ ccell_params_a.m_weights[0] = 1;
+ ccell_params_a.m_weights[1] = 1;
+ ccell_params_a.m_weights[2] = 1;
+ ccell_params_a.m_weights[3] = 1;
+
+ color_cell_compressor_results ccell_results_a;
+ uint8_t ccell_result_selectors_a[16];
+ memset(&ccell_results_a, 0, sizeof(ccell_results_a));
+ ccell_results_a.m_pSelectors = &ccell_result_selectors_a[0];
+ ccell_results_a.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err_a = color_cell_compression(255, &ccell_params_a, &ccell_results_a, &comp_params) / 3;
+
+ uint64_t total_err = part_err_rgb + part_err_a;
+
+ // ASTC
+ astc_block_desc blk;
+ memset(&blk, 0, sizeof(blk));
+
+ blk.m_dual_plane = true;
+ blk.m_weight_range = weight_range;
+
+ blk.m_ccs = rot_comp;
+ blk.m_subsets = 1;
+ blk.m_partition_seed = 0;
+ blk.m_cem = 8;
+
+ blk.m_endpoints[0] = (rot_comp == 0 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[1] = (rot_comp == 0 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[0];
+ blk.m_endpoints[2] = (rot_comp == 1 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[1];
+ blk.m_endpoints[3] = (rot_comp == 1 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[1];
+ blk.m_endpoints[4] = (rot_comp == 2 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[2];
+ blk.m_endpoints[5] = (rot_comp == 2 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[2];
+
+ bool invert = false;
+
+ int s0 = g_astc_unquant[endpoint_range][blk.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][blk.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(blk.m_endpoints[0], blk.m_endpoints[1]);
+ std::swap(blk.m_endpoints[2], blk.m_endpoints[3]);
+ std::swap(blk.m_endpoints[4], blk.m_endpoints[5]);
+ invert = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ uint32_t rgb_index = ccell_result_selectors_rgb[x + y * 4];
+ uint32_t a_index = ccell_result_selectors_a[x + y * 4];
+
+ if (invert)
+ {
+ rgb_index = 3 - rgb_index;
+ a_index = 3 - a_index;
+ }
+
+ blk.m_weights[(x + y * 4) * 2 + 0] = (uint8_t)rgb_index;
+ blk.m_weights[(x + y * 4) * 2 + 1] = (uint8_t)a_index;
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 6;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = blk;
+ pResults[total_results].m_astc_err = total_err;
+ total_results++;
+ }
+ } // rot_comp
+ }
+
+ // MODE 7 - 2 subset ASTC, 3 subset BC7
+ // DualPlane: 0, WeightRange: 2 (4), Subsets: 2, CEM: 8 (RGB Direct ), EndpointRange: 12 (40) MODE2
+ static void astc_mode7(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params, bool estimate_partition)
+ {
+ uint32_t first_common_pattern = 0;
+ uint32_t last_common_pattern = TOTAL_BC7_3_ASTC2_COMMON_PARTITIONS;
+
+ if (estimate_partition)
+ {
+ uint64_t best_err = UINT64_MAX;
+ uint32_t best_common_pattern = 0;
+ const uint32_t weights[4] = { 1, 1, 1, 1 };
+
+ for (uint32_t common_pattern = 0; common_pattern < TOTAL_BC7_3_ASTC2_COMMON_PARTITIONS; common_pattern++)
+ {
+ const uint8_t* pPartition = &g_bc7_3_astc2_patterns2[common_pattern][0];
+
+#ifdef _DEBUG
+ const uint32_t astc_pattern = g_bc7_3_astc2_common_partitions[common_pattern].m_astc2;
+ const uint32_t bc7_pattern = g_bc7_3_astc2_common_partitions[common_pattern].m_bc73;
+ const uint32_t common_pattern_k = g_bc7_3_astc2_common_partitions[common_pattern].k;
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t astc_part = bc7_convert_partition_index_3_to_2(g_bc7_partition3[16 * bc7_pattern + x + y * 4], common_pattern_k);
+ assert((int)astc_part == astc_compute_texel_partition(astc_pattern, x, y, 0, 2, true));
+ assert(astc_part == pPartition[x + y * 4]);
+ }
+ }
+#endif
+
+ color_quad_u8 subset_colors[2][16];
+ uint32_t subset_total_colors[2] = { 0, 0 };
+ for (uint32_t index = 0; index < 16; index++)
+ subset_colors[pPartition[index]][subset_total_colors[pPartition[index]]++] = ((const color_quad_u8*)block)[index];
+
+ uint64_t total_subset_err = 0;
+ for (uint32_t subset = 0; (subset < 2) && (total_subset_err < best_err); subset++)
+ total_subset_err += color_cell_compression_est_astc(4, 3, g_bc7_weights2, subset_total_colors[subset], &subset_colors[subset][0], best_err, weights);
+
+ if (total_subset_err < best_err)
+ {
+ best_err = total_subset_err;
+ best_common_pattern = common_pattern;
+ }
+ }
+
+ first_common_pattern = best_common_pattern;
+ last_common_pattern = best_common_pattern + 1;
+ }
+
+ //const uint32_t weight_range = 2;
+ const uint32_t endpoint_range = 12;
+
+ for (uint32_t common_pattern = first_common_pattern; common_pattern < last_common_pattern; common_pattern++)
+ {
+ const uint32_t astc_pattern = g_bc7_3_astc2_common_partitions[common_pattern].m_astc2;
+ const uint32_t bc7_pattern = g_bc7_3_astc2_common_partitions[common_pattern].m_bc73;
+ const uint32_t common_pattern_k = g_bc7_3_astc2_common_partitions[common_pattern].k;
+
+ color_rgba part_pixels[2][16];
+ uint32_t part_pixel_index[4][4];
+ uint32_t num_part_pixels[2] = { 0, 0 };
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t astc_part = bc7_convert_partition_index_3_to_2(g_bc7_partition3[16 * bc7_pattern + x + y * 4], common_pattern_k);
+#ifdef _DEBUG
+ assert((int)astc_part == astc_compute_texel_partition(astc_pattern, x, y, 0, 2, true));
+#endif
+
+ part_pixel_index[y][x] = num_part_pixels[astc_part];
+ part_pixels[astc_part][num_part_pixels[astc_part]++] = block[y][x];
+ }
+ }
+
+ color_cell_compressor_params ccell_params[2];
+ color_cell_compressor_results ccell_results[2];
+ uint8_t ccell_result_selectors[2][16];
+ uint8_t ccell_result_selectors_temp[2][16];
+
+ uint64_t total_part_err = 0;
+ for (uint32_t part = 0; part < 2; part++)
+ {
+ memset(&ccell_params[part], 0, sizeof(ccell_params[part]));
+
+ ccell_params[part].m_num_pixels = num_part_pixels[part];
+ ccell_params[part].m_pPixels = (color_quad_u8*)&part_pixels[part][0];
+ ccell_params[part].m_num_selector_weights = 4;
+ ccell_params[part].m_pSelector_weights = g_bc7_weights2;
+ ccell_params[part].m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params[part].m_astc_endpoint_range = endpoint_range;
+ ccell_params[part].m_weights[0] = 1;
+ ccell_params[part].m_weights[1] = 1;
+ ccell_params[part].m_weights[2] = 1;
+ ccell_params[part].m_weights[3] = 1;
+
+ memset(&ccell_results[part], 0, sizeof(ccell_results[part]));
+ ccell_results[part].m_pSelectors = &ccell_result_selectors[part][0];
+ ccell_results[part].m_pSelectors_temp = &ccell_result_selectors_temp[part][0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params[part], &ccell_results[part], &comp_params);
+ total_part_err += part_err;
+ } // part
+
+ // ASTC
+ astc_block_desc blk;
+ memset(&blk, 0, sizeof(blk));
+
+ blk.m_dual_plane = false;
+ blk.m_weight_range = 2;
+
+ blk.m_ccs = 0;
+ blk.m_subsets = 2;
+ blk.m_partition_seed = astc_pattern;
+ blk.m_cem = 8;
+
+ const uint32_t p0 = 0;
+ const uint32_t p1 = 1;
+
+ blk.m_endpoints[0] = ccell_results[p0].m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[1] = ccell_results[p0].m_astc_high_endpoint.m_c[0];
+ blk.m_endpoints[2] = ccell_results[p0].m_astc_low_endpoint.m_c[1];
+ blk.m_endpoints[3] = ccell_results[p0].m_astc_high_endpoint.m_c[1];
+ blk.m_endpoints[4] = ccell_results[p0].m_astc_low_endpoint.m_c[2];
+ blk.m_endpoints[5] = ccell_results[p0].m_astc_high_endpoint.m_c[2];
+
+ bool invert[2] = { false, false };
+
+ int s0 = g_astc_unquant[endpoint_range][blk.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][blk.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(blk.m_endpoints[0], blk.m_endpoints[1]);
+ std::swap(blk.m_endpoints[2], blk.m_endpoints[3]);
+ std::swap(blk.m_endpoints[4], blk.m_endpoints[5]);
+ invert[0] = true;
+ }
+
+ blk.m_endpoints[6] = ccell_results[p1].m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[7] = ccell_results[p1].m_astc_high_endpoint.m_c[0];
+ blk.m_endpoints[8] = ccell_results[p1].m_astc_low_endpoint.m_c[1];
+ blk.m_endpoints[9] = ccell_results[p1].m_astc_high_endpoint.m_c[1];
+ blk.m_endpoints[10] = ccell_results[p1].m_astc_low_endpoint.m_c[2];
+ blk.m_endpoints[11] = ccell_results[p1].m_astc_high_endpoint.m_c[2];
+
+ s0 = g_astc_unquant[endpoint_range][blk.m_endpoints[0 + 6]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[2 + 6]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[4 + 6]].m_unquant;
+ s1 = g_astc_unquant[endpoint_range][blk.m_endpoints[1 + 6]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[3 + 6]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[5 + 6]].m_unquant;
+
+ if (s1 < s0)
+ {
+ std::swap(blk.m_endpoints[0 + 6], blk.m_endpoints[1 + 6]);
+ std::swap(blk.m_endpoints[2 + 6], blk.m_endpoints[3 + 6]);
+ std::swap(blk.m_endpoints[4 + 6], blk.m_endpoints[5 + 6]);
+ invert[1] = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t astc_part = bc7_convert_partition_index_3_to_2(g_bc7_partition3[16 * bc7_pattern + x + y * 4], common_pattern_k);
+
+ blk.m_weights[x + y * 4] = ccell_result_selectors[astc_part][part_pixel_index[y][x]];
+
+ if (invert[astc_part])
+ blk.m_weights[x + y * 4] = 3 - blk.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 7;
+ pResults[total_results].m_common_pattern = common_pattern;
+ pResults[total_results].m_astc = blk;
+ pResults[total_results].m_astc_err = total_part_err;
+ total_results++;
+ }
+
+ } // common_pattern
+ }
+
+ static void estimate_partition2_list(uint32_t num_weights, uint32_t num_comps, const uint32_t* pWeights, const color_rgba block[4][4], uint32_t* pParts, uint32_t max_parts, const uint32_t weights[4])
+ {
+ assert(pWeights[0] == 0 && pWeights[num_weights - 1] == 64);
+
+ const uint32_t MAX_PARTS = 8;
+ assert(max_parts <= MAX_PARTS);
+
+ uint64_t part_error[MAX_PARTS];
+ memset(part_error, 0xFF, sizeof(part_error));
+ memset(pParts, 0, sizeof(pParts[0]) * max_parts);
+
+ for (uint32_t common_pattern = 0; common_pattern < TOTAL_ASTC_BC7_COMMON_PARTITIONS2; common_pattern++)
+ {
+ const uint32_t bc7_pattern = g_astc_bc7_common_partitions2[common_pattern].m_bc7;
+
+ const uint8_t* pPartition = &g_bc7_partition2[bc7_pattern * 16];
+
+ color_quad_u8 subset_colors[2][16];
+ uint32_t subset_total_colors[2] = { 0, 0 };
+ for (uint32_t index = 0; index < 16; index++)
+ subset_colors[pPartition[index]][subset_total_colors[pPartition[index]]++] = ((const color_quad_u8*)block)[index];
+
+ uint64_t total_subset_err = 0;
+ for (uint32_t subset = 0; subset < 2; subset++)
+ total_subset_err += color_cell_compression_est_astc(num_weights, num_comps, pWeights, subset_total_colors[subset], &subset_colors[subset][0], UINT64_MAX, weights);
+
+ for (int i = 0; i < (int)max_parts; i++)
+ {
+ if (total_subset_err < part_error[i])
+ {
+ for (int j = max_parts - 1; j > i; --j)
+ {
+ pParts[j] = pParts[j - 1];
+ part_error[j] = part_error[j - 1];
+ }
+
+ pParts[i] = common_pattern;
+ part_error[i] = total_subset_err;
+
+ break;
+ }
+ }
+ }
+
+#ifdef _DEBUG
+ for (uint32_t i = 0; i < max_parts - 1; i++)
+ {
+ assert(part_error[i] <= part_error[i + 1]);
+ }
+#endif
+ }
+
+ // 9. DualPlane: 0, WeightRange: 2 (4), Subsets: 2, CEM: 12 (RGBA Direct), EndpointRange: 8 (16) - BC7 MODE 7
+ // 16. DualPlane: 0, WeightRange : 2 (4), Subsets : 2, CEM: 4 (LA Direct), EndpointRange : 20 (256) - BC7 MODE 7
+ static void astc_mode9_or_16(uint32_t mode, const color_rgba source_block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params, uint32_t estimate_partition_list_size)
+ {
+ assert(mode == 9 || mode == 16);
+
+ const color_rgba* pBlock = &source_block[0][0];
+
+ color_rgba temp_block[16];
+ if (mode == 16)
+ {
+ for (uint32_t i = 0; i < 16; i++)
+ {
+ if (mode == 16)
+ {
+ assert(pBlock[i].r == pBlock[i].g);
+ assert(pBlock[i].r == pBlock[i].b);
+ }
+
+ const uint32_t l = pBlock[i].r;
+ const uint32_t a = pBlock[i].a;
+
+ // Use (l,0,0,a) not (l,l,l,a) so both components are treated equally.
+ temp_block[i].set_noclamp_rgba(l, 0, 0, a);
+ }
+
+ pBlock = temp_block;
+ }
+
+ const uint32_t weights[4] = { 1, 1, 1, 1 };
+
+ //const uint32_t weight_range = 2;
+ const uint32_t endpoint_range = (mode == 16) ? 20 : 8;
+
+ uint32_t first_common_pattern = 0;
+ uint32_t last_common_pattern = TOTAL_ASTC_BC7_COMMON_PARTITIONS2;
+ bool use_part_list = false;
+
+ const uint32_t MAX_PARTS = 8;
+ uint32_t parts[MAX_PARTS];
+
+ if (estimate_partition_list_size == 1)
+ {
+ first_common_pattern = estimate_partition2(4, 4, g_bc7_weights2, (const color_rgba(*)[4])pBlock, weights);
+ last_common_pattern = first_common_pattern + 1;
+ }
+ else if (estimate_partition_list_size > 0)
+ {
+ assert(estimate_partition_list_size <= MAX_PARTS);
+ estimate_partition_list_size = std::min(estimate_partition_list_size, MAX_PARTS);
+
+ estimate_partition2_list(4, 4, g_bc7_weights2, (const color_rgba(*)[4])pBlock, parts, estimate_partition_list_size, weights);
+
+ first_common_pattern = 0;
+ last_common_pattern = estimate_partition_list_size;
+ use_part_list = true;
+
+#ifdef _DEBUG
+ assert(parts[0] == estimate_partition2(4, 4, g_bc7_weights2, (const color_rgba(*)[4])pBlock, weights));
+#endif
+ }
+
+ for (uint32_t common_pattern_iter = first_common_pattern; common_pattern_iter < last_common_pattern; common_pattern_iter++)
+ {
+ const uint32_t common_pattern = use_part_list ? parts[common_pattern_iter] : common_pattern_iter;
+
+ const uint32_t bc7_pattern = g_astc_bc7_common_partitions2[common_pattern].m_bc7;
+
+ color_rgba part_pixels[2][16];
+ uint32_t part_pixel_index[4][4];
+ uint32_t num_part_pixels[2] = { 0, 0 };
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t part = g_bc7_partition2[16 * bc7_pattern + x + y * 4];
+ part_pixel_index[y][x] = num_part_pixels[part];
+ part_pixels[part][num_part_pixels[part]++] = pBlock[y * 4 + x];
+ }
+ }
+
+ color_cell_compressor_params ccell_params[2];
+ color_cell_compressor_results ccell_results[2];
+ uint8_t ccell_result_selectors[2][16];
+ uint8_t ccell_result_selectors_temp[2][16];
+
+ uint64_t total_err = 0;
+ for (uint32_t subset = 0; subset < 2; subset++)
+ {
+ memset(&ccell_params[subset], 0, sizeof(ccell_params[subset]));
+
+ ccell_params[subset].m_num_pixels = num_part_pixels[subset];
+ ccell_params[subset].m_pPixels = (color_quad_u8*)&part_pixels[subset][0];
+ ccell_params[subset].m_num_selector_weights = 4;
+ ccell_params[subset].m_pSelector_weights = g_bc7_weights2;
+ ccell_params[subset].m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params[subset].m_astc_endpoint_range = endpoint_range;
+ ccell_params[subset].m_weights[0] = weights[0];
+ ccell_params[subset].m_weights[1] = weights[1];
+ ccell_params[subset].m_weights[2] = weights[2];
+ ccell_params[subset].m_weights[3] = weights[3];
+ ccell_params[subset].m_has_alpha = true;
+
+ memset(&ccell_results[subset], 0, sizeof(ccell_results[subset]));
+ ccell_results[subset].m_pSelectors = &ccell_result_selectors[subset][0];
+ ccell_results[subset].m_pSelectors_temp = &ccell_result_selectors_temp[subset][0];
+
+ uint64_t subset_err = color_cell_compression(255, &ccell_params[subset], &ccell_results[subset], &comp_params);
+
+ if (mode == 16)
+ {
+ color_rgba colors[4];
+ for (uint32_t c = 0; c < 4; c++)
+ {
+ colors[0].m_comps[c] = g_astc_unquant[endpoint_range][ccell_results[subset].m_astc_low_endpoint.m_c[(c < 3) ? 0 : 3]].m_unquant;
+ colors[3].m_comps[c] = g_astc_unquant[endpoint_range][ccell_results[subset].m_astc_high_endpoint.m_c[(c < 3) ? 0 : 3]].m_unquant;
+ }
+
+ for (uint32_t i = 1; i < 4 - 1; i++)
+ for (uint32_t c = 0; c < 4; c++)
+ colors[i].m_comps[c] = (uint8_t)astc_interpolate(colors[0].m_comps[c], colors[3].m_comps[c], g_bc7_weights2[i], false);
+
+ for (uint32_t p = 0; p < ccell_params[subset].m_num_pixels; p++)
+ {
+ color_rgba orig_pix(part_pixels[subset][p]);
+ orig_pix.g = orig_pix.r;
+ orig_pix.b = orig_pix.r;
+ total_err += color_distance_la(orig_pix, colors[ccell_result_selectors[subset][p]]);
+ }
+ }
+ else
+ {
+ total_err += subset_err;
+ }
+ } // subset
+
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = 2;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 2;
+ astc_results.m_partition_seed = g_astc_bc7_common_partitions2[common_pattern].m_astc;
+ astc_results.m_cem = (mode == 16) ? 4 : 12;
+
+ uint32_t part[2] = { 0, 1 };
+ if (g_astc_bc7_common_partitions2[common_pattern].m_invert)
+ std::swap(part[0], part[1]);
+
+ bool invert[2] = { false, false };
+
+ for (uint32_t p = 0; p < 2; p++)
+ {
+ if (mode == 16)
+ {
+ astc_results.m_endpoints[p * 4 + 0] = ccell_results[part[p]].m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[p * 4 + 1] = ccell_results[part[p]].m_astc_high_endpoint.m_c[0];
+
+ astc_results.m_endpoints[p * 4 + 2] = ccell_results[part[p]].m_astc_low_endpoint.m_c[3];
+ astc_results.m_endpoints[p * 4 + 3] = ccell_results[part[p]].m_astc_high_endpoint.m_c[3];
+ }
+ else
+ {
+ for (uint32_t c = 0; c < 4; c++)
+ {
+ astc_results.m_endpoints[p * 8 + c * 2] = ccell_results[part[p]].m_astc_low_endpoint.m_c[c];
+ astc_results.m_endpoints[p * 8 + c * 2 + 1] = ccell_results[part[p]].m_astc_high_endpoint.m_c[c];
+ }
+
+ int s0 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[p * 8 + 0]].m_unquant +
+ g_astc_unquant[endpoint_range][astc_results.m_endpoints[p * 8 + 2]].m_unquant +
+ g_astc_unquant[endpoint_range][astc_results.m_endpoints[p * 8 + 4]].m_unquant;
+
+ int s1 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[p * 8 + 1]].m_unquant +
+ g_astc_unquant[endpoint_range][astc_results.m_endpoints[p * 8 + 3]].m_unquant +
+ g_astc_unquant[endpoint_range][astc_results.m_endpoints[p * 8 + 5]].m_unquant;
+
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[p * 8 + 0], astc_results.m_endpoints[p * 8 + 1]);
+ std::swap(astc_results.m_endpoints[p * 8 + 2], astc_results.m_endpoints[p * 8 + 3]);
+ std::swap(astc_results.m_endpoints[p * 8 + 4], astc_results.m_endpoints[p * 8 + 5]);
+ std::swap(astc_results.m_endpoints[p * 8 + 6], astc_results.m_endpoints[p * 8 + 7]);
+ invert[p] = true;
+ }
+ }
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const uint32_t bc7_part = g_bc7_partition2[16 * bc7_pattern + x + y * 4];
+
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[bc7_part][part_pixel_index[y][x]];
+
+ uint32_t astc_part = bc7_part;
+ if (g_astc_bc7_common_partitions2[common_pattern].m_invert)
+ astc_part = 1 - astc_part;
+
+ if (invert[astc_part])
+ astc_results.m_weights[x + y * 4] = 3 - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = mode;
+ pResults[total_results].m_common_pattern = common_pattern;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = total_err;
+ total_results++;
+ }
+
+ } // common_pattern
+ }
+
+ // MODE 10
+ // DualPlane: 0, WeightRange: 8 (16), Subsets: 1, CEM: 12 (RGBA Direct ), EndpointRange: 13 (48) MODE6
+ static void astc_mode10(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ const uint32_t weight_range = 8;
+ const uint32_t endpoint_range = 13;
+
+ color_cell_compressor_params ccell_params;
+ memset(&ccell_params, 0, sizeof(ccell_params));
+
+ ccell_params.m_num_pixels = 16;
+ ccell_params.m_pPixels = (color_quad_u8*)&block[0][0];
+ ccell_params.m_num_selector_weights = 16;
+ ccell_params.m_pSelector_weights = g_astc_weights4;
+ ccell_params.m_pSelector_weightsx = (const bc7enc_vec4F*)g_astc_weights4x;
+ ccell_params.m_astc_endpoint_range = endpoint_range;
+ ccell_params.m_weights[0] = 1;
+ ccell_params.m_weights[1] = 1;
+ ccell_params.m_weights[2] = 1;
+ ccell_params.m_weights[3] = 1;
+ ccell_params.m_has_alpha = true;
+
+ color_cell_compressor_results ccell_results;
+ uint8_t ccell_result_selectors[16];
+ uint8_t ccell_result_selectors_temp[16];
+ memset(&ccell_results, 0, sizeof(ccell_results));
+ ccell_results.m_pSelectors = &ccell_result_selectors[0];
+ ccell_results.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params, &ccell_results, &comp_params);
+
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = weight_range;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 1;
+ astc_results.m_partition_seed = 0;
+ astc_results.m_cem = 12;
+
+ astc_results.m_endpoints[0] = ccell_results.m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[1] = ccell_results.m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[2] = ccell_results.m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[3] = ccell_results.m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[4] = ccell_results.m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[5] = ccell_results.m_astc_high_endpoint.m_c[2];
+ astc_results.m_endpoints[6] = ccell_results.m_astc_low_endpoint.m_c[3];
+ astc_results.m_endpoints[7] = ccell_results.m_astc_high_endpoint.m_c[3];
+
+ bool invert = false;
+
+ int s0 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0], astc_results.m_endpoints[1]);
+ std::swap(astc_results.m_endpoints[2], astc_results.m_endpoints[3]);
+ std::swap(astc_results.m_endpoints[4], astc_results.m_endpoints[5]);
+ std::swap(astc_results.m_endpoints[6], astc_results.m_endpoints[7]);
+ invert = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[x + y * 4];
+
+ if (invert)
+ astc_results.m_weights[x + y * 4] = 15 - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 10;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = part_err;
+ total_results++;
+ }
+ }
+
+ // 11. DualPlane: 1, WeightRange: 2 (4), Subsets: 1, CEM: 12 (RGBA Direct), EndpointRange: 13 (48) MODE5
+ // 17. DualPlane: 1, WeightRange : 2 (4), Subsets : 1, CEM : 4 (LA Direct), EndpointRange : 20 (256) BC7 MODE5
+ static void astc_mode11_or_17(uint32_t mode, const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ assert((mode == 11) || (mode == 17));
+
+ const uint32_t weight_range = 2;
+ const uint32_t endpoint_range = (mode == 17) ? 20 : 13;
+
+ bc7enc_compress_block_params local_comp_params(comp_params);
+ local_comp_params.m_perceptual = false;
+ local_comp_params.m_weights[0] = 1;
+ local_comp_params.m_weights[1] = 1;
+ local_comp_params.m_weights[2] = 1;
+ local_comp_params.m_weights[3] = 1;
+
+ const uint32_t last_rot_comp = (mode == 17) ? 1 : 4;
+
+ for (uint32_t rot_comp = 0; rot_comp < last_rot_comp; rot_comp++)
+ {
+ color_quad_u8 block_rgb[16];
+ color_quad_u8 block_a[16];
+ for (uint32_t i = 0; i < 16; i++)
+ {
+ block_rgb[i] = ((color_quad_u8*)&block[0][0])[i];
+ block_a[i] = block_rgb[i];
+
+ if (mode == 17)
+ {
+ assert(block_rgb[i].m_c[0] == block_rgb[i].m_c[1]);
+ assert(block_rgb[i].m_c[0] == block_rgb[i].m_c[2]);
+
+ block_a[i].m_c[0] = block_rgb[i].m_c[3];
+ block_a[i].m_c[1] = block_rgb[i].m_c[3];
+ block_a[i].m_c[2] = block_rgb[i].m_c[3];
+ block_a[i].m_c[3] = 255;
+
+ block_rgb[i].m_c[1] = block_rgb[i].m_c[0];
+ block_rgb[i].m_c[2] = block_rgb[i].m_c[0];
+ block_rgb[i].m_c[3] = 255;
+ }
+ else
+ {
+ uint8_t c = block_a[i].m_c[rot_comp];
+ block_a[i].m_c[0] = c;
+ block_a[i].m_c[1] = c;
+ block_a[i].m_c[2] = c;
+ block_a[i].m_c[3] = 255;
+
+ block_rgb[i].m_c[rot_comp] = block_rgb[i].m_c[3];
+ block_rgb[i].m_c[3] = 255;
+ }
+ }
+
+ uint8_t ccell_result_selectors_temp[16];
+
+ color_cell_compressor_params ccell_params_rgb;
+ memset(&ccell_params_rgb, 0, sizeof(ccell_params_rgb));
+
+ ccell_params_rgb.m_num_pixels = 16;
+ ccell_params_rgb.m_pPixels = block_rgb;
+ ccell_params_rgb.m_num_selector_weights = 4;
+ ccell_params_rgb.m_pSelector_weights = g_bc7_weights2;
+ ccell_params_rgb.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params_rgb.m_astc_endpoint_range = endpoint_range;
+ ccell_params_rgb.m_weights[0] = 1;
+ ccell_params_rgb.m_weights[1] = 1;
+ ccell_params_rgb.m_weights[2] = 1;
+ ccell_params_rgb.m_weights[3] = 1;
+
+ color_cell_compressor_results ccell_results_rgb;
+ uint8_t ccell_result_selectors_rgb[16];
+ memset(&ccell_results_rgb, 0, sizeof(ccell_results_rgb));
+ ccell_results_rgb.m_pSelectors = &ccell_result_selectors_rgb[0];
+ ccell_results_rgb.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err_rgb = color_cell_compression(255, &ccell_params_rgb, &ccell_results_rgb, &local_comp_params);
+
+ color_cell_compressor_params ccell_params_a;
+ memset(&ccell_params_a, 0, sizeof(ccell_params_a));
+
+ ccell_params_a.m_num_pixels = 16;
+ ccell_params_a.m_pPixels = block_a;
+ ccell_params_a.m_num_selector_weights = 4;
+ ccell_params_a.m_pSelector_weights = g_bc7_weights2;
+ ccell_params_a.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params_a.m_astc_endpoint_range = endpoint_range;
+ ccell_params_a.m_weights[0] = 1;
+ ccell_params_a.m_weights[1] = 1;
+ ccell_params_a.m_weights[2] = 1;
+ ccell_params_a.m_weights[3] = 1;
+
+ color_cell_compressor_results ccell_results_a;
+ uint8_t ccell_result_selectors_a[16];
+ memset(&ccell_results_a, 0, sizeof(ccell_results_a));
+ ccell_results_a.m_pSelectors = &ccell_result_selectors_a[0];
+ ccell_results_a.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err_a = color_cell_compression(255, &ccell_params_a, &ccell_results_a, &local_comp_params) / 3;
+
+ uint64_t total_err = (mode == 17) ? ((part_err_rgb / 3) + part_err_a) : (part_err_rgb + part_err_a);
+
+ // ASTC
+ astc_block_desc blk;
+ memset(&blk, 0, sizeof(blk));
+
+ blk.m_dual_plane = true;
+ blk.m_weight_range = weight_range;
+
+ blk.m_ccs = (mode == 17) ? 3 : rot_comp;
+ blk.m_subsets = 1;
+ blk.m_partition_seed = 0;
+ blk.m_cem = (mode == 17) ? 4 : 12;
+
+ bool invert = false;
+
+ if (mode == 17)
+ {
+ assert(ccell_results_rgb.m_astc_low_endpoint.m_c[0] == ccell_results_rgb.m_astc_low_endpoint.m_c[1]);
+ assert(ccell_results_rgb.m_astc_low_endpoint.m_c[0] == ccell_results_rgb.m_astc_low_endpoint.m_c[2]);
+
+ assert(ccell_results_rgb.m_astc_high_endpoint.m_c[0] == ccell_results_rgb.m_astc_high_endpoint.m_c[1]);
+ assert(ccell_results_rgb.m_astc_high_endpoint.m_c[0] == ccell_results_rgb.m_astc_high_endpoint.m_c[2]);
+
+ blk.m_endpoints[0] = ccell_results_rgb.m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[1] = ccell_results_rgb.m_astc_high_endpoint.m_c[0];
+
+ blk.m_endpoints[2] = ccell_results_a.m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[3] = ccell_results_a.m_astc_high_endpoint.m_c[0];
+ }
+ else
+ {
+ blk.m_endpoints[0] = (rot_comp == 0 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[1] = (rot_comp == 0 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[0];
+ blk.m_endpoints[2] = (rot_comp == 1 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[1];
+ blk.m_endpoints[3] = (rot_comp == 1 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[1];
+ blk.m_endpoints[4] = (rot_comp == 2 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[2];
+ blk.m_endpoints[5] = (rot_comp == 2 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[2];
+ if (rot_comp == 3)
+ {
+ blk.m_endpoints[6] = ccell_results_a.m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[7] = ccell_results_a.m_astc_high_endpoint.m_c[0];
+ }
+ else
+ {
+ blk.m_endpoints[6] = ccell_results_rgb.m_astc_low_endpoint.m_c[rot_comp];
+ blk.m_endpoints[7] = ccell_results_rgb.m_astc_high_endpoint.m_c[rot_comp];
+ }
+
+ int s0 = g_astc_unquant[endpoint_range][blk.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][blk.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(blk.m_endpoints[0], blk.m_endpoints[1]);
+ std::swap(blk.m_endpoints[2], blk.m_endpoints[3]);
+ std::swap(blk.m_endpoints[4], blk.m_endpoints[5]);
+ std::swap(blk.m_endpoints[6], blk.m_endpoints[7]);
+ invert = true;
+ }
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ uint32_t rgb_index = ccell_result_selectors_rgb[x + y * 4];
+ uint32_t a_index = ccell_result_selectors_a[x + y * 4];
+
+ if (invert)
+ {
+ rgb_index = 3 - rgb_index;
+ a_index = 3 - a_index;
+ }
+
+ blk.m_weights[(x + y * 4) * 2 + 0] = (uint8_t)rgb_index;
+ blk.m_weights[(x + y * 4) * 2 + 1] = (uint8_t)a_index;
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = mode;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = blk;
+ pResults[total_results].m_astc_err = total_err;
+ total_results++;
+ }
+ } // rot_comp
+ }
+
+ // MODE 12
+ // DualPlane: 0, WeightRange: 5 (8), Subsets: 1, CEM: 12 (RGBA Direct ), EndpointRange: 19 (192) MODE6
+ static void astc_mode12(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ const uint32_t weight_range = 5;
+ const uint32_t endpoint_range = 19;
+
+ color_cell_compressor_params ccell_params;
+ memset(&ccell_params, 0, sizeof(ccell_params));
+
+ ccell_params.m_num_pixels = 16;
+ ccell_params.m_pPixels = (color_quad_u8*)&block[0][0];
+ ccell_params.m_num_selector_weights = 8;
+ ccell_params.m_pSelector_weights = g_bc7_weights3;
+ ccell_params.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights3x;
+ ccell_params.m_astc_endpoint_range = endpoint_range;
+ ccell_params.m_weights[0] = 1;
+ ccell_params.m_weights[1] = 1;
+ ccell_params.m_weights[2] = 1;
+ ccell_params.m_weights[3] = 1;
+ ccell_params.m_has_alpha = true;
+
+ color_cell_compressor_results ccell_results;
+ uint8_t ccell_result_selectors[16];
+ uint8_t ccell_result_selectors_temp[16];
+ memset(&ccell_results, 0, sizeof(ccell_results));
+ ccell_results.m_pSelectors = &ccell_result_selectors[0];
+ ccell_results.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params, &ccell_results, &comp_params);
+
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = weight_range;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 1;
+ astc_results.m_partition_seed = 0;
+ astc_results.m_cem = 12;
+
+ astc_results.m_endpoints[0] = ccell_results.m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[1] = ccell_results.m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[2] = ccell_results.m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[3] = ccell_results.m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[4] = ccell_results.m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[5] = ccell_results.m_astc_high_endpoint.m_c[2];
+ astc_results.m_endpoints[6] = ccell_results.m_astc_low_endpoint.m_c[3];
+ astc_results.m_endpoints[7] = ccell_results.m_astc_high_endpoint.m_c[3];
+
+ bool invert = false;
+
+ int s0 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0], astc_results.m_endpoints[1]);
+ std::swap(astc_results.m_endpoints[2], astc_results.m_endpoints[3]);
+ std::swap(astc_results.m_endpoints[4], astc_results.m_endpoints[5]);
+ std::swap(astc_results.m_endpoints[6], astc_results.m_endpoints[7]);
+ invert = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[x + y * 4];
+
+ if (invert)
+ astc_results.m_weights[x + y * 4] = 7 - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 12;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = part_err;
+ total_results++;
+ }
+ }
+
+ // 13. DualPlane: 1, WeightRange: 0 (2), Subsets: 1, CEM: 12 (RGBA Direct ), EndpointRange: 20 (256) MODE5
+ static void astc_mode13(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ bc7enc_compress_block_params local_comp_params(comp_params);
+ local_comp_params.m_perceptual = false;
+ local_comp_params.m_weights[0] = 1;
+ local_comp_params.m_weights[1] = 1;
+ local_comp_params.m_weights[2] = 1;
+ local_comp_params.m_weights[3] = 1;
+
+ for (uint32_t rot_comp = 0; rot_comp < 4; rot_comp++)
+ {
+ const uint32_t weight_range = 0;
+ const uint32_t endpoint_range = 20;
+
+ color_quad_u8 block_rgb[16];
+ color_quad_u8 block_a[16];
+ for (uint32_t i = 0; i < 16; i++)
+ {
+ block_rgb[i] = ((color_quad_u8*)&block[0][0])[i];
+ block_a[i] = block_rgb[i];
+
+ uint8_t c = block_a[i].m_c[rot_comp];
+ block_a[i].m_c[0] = c;
+ block_a[i].m_c[1] = c;
+ block_a[i].m_c[2] = c;
+ block_a[i].m_c[3] = 255;
+
+ block_rgb[i].m_c[rot_comp] = block_rgb[i].m_c[3];
+ block_rgb[i].m_c[3] = 255;
+ }
+
+ uint8_t ccell_result_selectors_temp[16];
+
+ color_cell_compressor_params ccell_params_rgb;
+ memset(&ccell_params_rgb, 0, sizeof(ccell_params_rgb));
+
+ ccell_params_rgb.m_num_pixels = 16;
+ ccell_params_rgb.m_pPixels = block_rgb;
+ ccell_params_rgb.m_num_selector_weights = 2;
+ ccell_params_rgb.m_pSelector_weights = g_bc7_weights1;
+ ccell_params_rgb.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights1x;
+ ccell_params_rgb.m_astc_endpoint_range = endpoint_range;
+ ccell_params_rgb.m_weights[0] = 1;
+ ccell_params_rgb.m_weights[1] = 1;
+ ccell_params_rgb.m_weights[2] = 1;
+ ccell_params_rgb.m_weights[3] = 1;
+
+ color_cell_compressor_results ccell_results_rgb;
+ uint8_t ccell_result_selectors_rgb[16];
+ memset(&ccell_results_rgb, 0, sizeof(ccell_results_rgb));
+ ccell_results_rgb.m_pSelectors = &ccell_result_selectors_rgb[0];
+ ccell_results_rgb.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err_rgb = color_cell_compression(255, &ccell_params_rgb, &ccell_results_rgb, &local_comp_params);
+
+ color_cell_compressor_params ccell_params_a;
+ memset(&ccell_params_a, 0, sizeof(ccell_params_a));
+
+ ccell_params_a.m_num_pixels = 16;
+ ccell_params_a.m_pPixels = block_a;
+ ccell_params_a.m_num_selector_weights = 2;
+ ccell_params_a.m_pSelector_weights = g_bc7_weights1;
+ ccell_params_a.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights1x;
+ ccell_params_a.m_astc_endpoint_range = endpoint_range;
+ ccell_params_a.m_weights[0] = 1;
+ ccell_params_a.m_weights[1] = 1;
+ ccell_params_a.m_weights[2] = 1;
+ ccell_params_a.m_weights[3] = 1;
+
+ color_cell_compressor_results ccell_results_a;
+ uint8_t ccell_result_selectors_a[16];
+ memset(&ccell_results_a, 0, sizeof(ccell_results_a));
+ ccell_results_a.m_pSelectors = &ccell_result_selectors_a[0];
+ ccell_results_a.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err_a = color_cell_compression(255, &ccell_params_a, &ccell_results_a, &local_comp_params) / 3;
+
+ uint64_t total_err = part_err_rgb + part_err_a;
+
+ // ASTC
+ astc_block_desc blk;
+ memset(&blk, 0, sizeof(blk));
+
+ blk.m_dual_plane = true;
+ blk.m_weight_range = weight_range;
+
+ blk.m_ccs = rot_comp;
+ blk.m_subsets = 1;
+ blk.m_partition_seed = 0;
+ blk.m_cem = 12;
+
+ blk.m_endpoints[0] = (rot_comp == 0 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[1] = (rot_comp == 0 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[0];
+ blk.m_endpoints[2] = (rot_comp == 1 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[1];
+ blk.m_endpoints[3] = (rot_comp == 1 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[1];
+ blk.m_endpoints[4] = (rot_comp == 2 ? ccell_results_a : ccell_results_rgb).m_astc_low_endpoint.m_c[2];
+ blk.m_endpoints[5] = (rot_comp == 2 ? ccell_results_a : ccell_results_rgb).m_astc_high_endpoint.m_c[2];
+ if (rot_comp == 3)
+ {
+ blk.m_endpoints[6] = ccell_results_a.m_astc_low_endpoint.m_c[0];
+ blk.m_endpoints[7] = ccell_results_a.m_astc_high_endpoint.m_c[0];
+ }
+ else
+ {
+ blk.m_endpoints[6] = ccell_results_rgb.m_astc_low_endpoint.m_c[rot_comp];
+ blk.m_endpoints[7] = ccell_results_rgb.m_astc_high_endpoint.m_c[rot_comp];
+ }
+
+ bool invert = false;
+
+ int s0 = g_astc_unquant[endpoint_range][blk.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][blk.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][blk.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(blk.m_endpoints[0], blk.m_endpoints[1]);
+ std::swap(blk.m_endpoints[2], blk.m_endpoints[3]);
+ std::swap(blk.m_endpoints[4], blk.m_endpoints[5]);
+ std::swap(blk.m_endpoints[6], blk.m_endpoints[7]);
+ invert = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ uint32_t rgb_index = ccell_result_selectors_rgb[x + y * 4];
+ uint32_t a_index = ccell_result_selectors_a[x + y * 4];
+
+ if (invert)
+ {
+ rgb_index = 1 - rgb_index;
+ a_index = 1 - a_index;
+ }
+
+ blk.m_weights[(x + y * 4) * 2 + 0] = (uint8_t)rgb_index;
+ blk.m_weights[(x + y * 4) * 2 + 1] = (uint8_t)a_index;
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 13;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = blk;
+ pResults[total_results].m_astc_err = total_err;
+ total_results++;
+ }
+ } // rot_comp
+ }
+
+ // MODE14
+ // DualPlane: 0, WeightRange: 2 (4), Subsets: 1, CEM: 12 (RGBA Direct ), EndpointRange: 20 (256) MODE6
+ static void astc_mode14(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ const uint32_t weight_range = 2;
+ const uint32_t endpoint_range = 20;
+
+ color_cell_compressor_params ccell_params;
+ memset(&ccell_params, 0, sizeof(ccell_params));
+
+ ccell_params.m_num_pixels = 16;
+ ccell_params.m_pPixels = (color_quad_u8*)&block[0][0];
+ ccell_params.m_num_selector_weights = 4;
+ ccell_params.m_pSelector_weights = g_bc7_weights2;
+ ccell_params.m_pSelector_weightsx = (const bc7enc_vec4F*)g_bc7_weights2x;
+ ccell_params.m_astc_endpoint_range = endpoint_range;
+ ccell_params.m_weights[0] = 1;
+ ccell_params.m_weights[1] = 1;
+ ccell_params.m_weights[2] = 1;
+ ccell_params.m_weights[3] = 1;
+ ccell_params.m_has_alpha = true;
+
+ color_cell_compressor_results ccell_results;
+ uint8_t ccell_result_selectors[16];
+ uint8_t ccell_result_selectors_temp[16];
+ memset(&ccell_results, 0, sizeof(ccell_results));
+ ccell_results.m_pSelectors = &ccell_result_selectors[0];
+ ccell_results.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ uint64_t part_err = color_cell_compression(255, &ccell_params, &ccell_results, &comp_params);
+
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = weight_range;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 1;
+ astc_results.m_partition_seed = 0;
+ astc_results.m_cem = 12;
+
+ astc_results.m_endpoints[0] = ccell_results.m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[1] = ccell_results.m_astc_high_endpoint.m_c[0];
+ astc_results.m_endpoints[2] = ccell_results.m_astc_low_endpoint.m_c[1];
+ astc_results.m_endpoints[3] = ccell_results.m_astc_high_endpoint.m_c[1];
+ astc_results.m_endpoints[4] = ccell_results.m_astc_low_endpoint.m_c[2];
+ astc_results.m_endpoints[5] = ccell_results.m_astc_high_endpoint.m_c[2];
+ astc_results.m_endpoints[6] = ccell_results.m_astc_low_endpoint.m_c[3];
+ astc_results.m_endpoints[7] = ccell_results.m_astc_high_endpoint.m_c[3];
+
+ bool invert = false;
+
+ int s0 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[0]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[2]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[4]].m_unquant;
+ int s1 = g_astc_unquant[endpoint_range][astc_results.m_endpoints[1]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[3]].m_unquant + g_astc_unquant[endpoint_range][astc_results.m_endpoints[5]].m_unquant;
+ if (s1 < s0)
+ {
+ std::swap(astc_results.m_endpoints[0], astc_results.m_endpoints[1]);
+ std::swap(astc_results.m_endpoints[2], astc_results.m_endpoints[3]);
+ std::swap(astc_results.m_endpoints[4], astc_results.m_endpoints[5]);
+ std::swap(astc_results.m_endpoints[6], astc_results.m_endpoints[7]);
+ invert = true;
+ }
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[x + y * 4];
+
+ if (invert)
+ astc_results.m_weights[x + y * 4] = 3 - astc_results.m_weights[x + y * 4];
+ }
+ }
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 14;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = part_err;
+ total_results++;
+ }
+ }
+
+ // MODE 15
+ // DualPlane: 0, WeightRange : 8 (16), Subsets : 1, CEM : 4 (LA Direct), EndpointRange : 20 (256) BC7 MODE6
+ static void astc_mode15(const color_rgba block[4][4], uastc_encode_results* pResults, uint32_t& total_results, bc7enc_compress_block_params& comp_params)
+ {
+ const uint32_t weight_range = 8;
+ const uint32_t endpoint_range = 20;
+
+ color_cell_compressor_params ccell_params;
+ memset(&ccell_params, 0, sizeof(ccell_params));
+
+ color_rgba temp_block[16];
+ for (uint32_t i = 0; i < 16; i++)
+ {
+ const uint32_t l = ((const color_rgba*)block)[i].r;
+ const uint32_t a = ((const color_rgba*)block)[i].a;
+
+ // Use (l,0,0,a) not (l,l,l,a) so both components are treated equally.
+ temp_block[i].set_noclamp_rgba(l, 0, 0, a);
+ }
+
+ ccell_params.m_num_pixels = 16;
+ //ccell_params.m_pPixels = (color_quad_u8*)&block[0][0];
+ ccell_params.m_pPixels = (color_quad_u8*)temp_block;
+ ccell_params.m_num_selector_weights = 16;
+ ccell_params.m_pSelector_weights = g_astc_weights4;
+ ccell_params.m_pSelector_weightsx = (const bc7enc_vec4F*)g_astc_weights4x;
+ ccell_params.m_astc_endpoint_range = endpoint_range;
+ ccell_params.m_weights[0] = 1;
+ ccell_params.m_weights[1] = 1;
+ ccell_params.m_weights[2] = 1;
+ ccell_params.m_weights[3] = 1;
+ ccell_params.m_has_alpha = true;
+
+ color_cell_compressor_results ccell_results;
+ uint8_t ccell_result_selectors[16];
+ uint8_t ccell_result_selectors_temp[16];
+ memset(&ccell_results, 0, sizeof(ccell_results));
+ ccell_results.m_pSelectors = &ccell_result_selectors[0];
+ ccell_results.m_pSelectors_temp = &ccell_result_selectors_temp[0];
+
+ color_cell_compression(255, &ccell_params, &ccell_results, &comp_params);
+
+ // ASTC
+ astc_block_desc astc_results;
+ memset(&astc_results, 0, sizeof(astc_results));
+
+ astc_results.m_dual_plane = false;
+ astc_results.m_weight_range = weight_range;
+
+ astc_results.m_ccs = 0;
+ astc_results.m_subsets = 1;
+ astc_results.m_partition_seed = 0;
+ astc_results.m_cem = 4;
+
+ astc_results.m_endpoints[0] = ccell_results.m_astc_low_endpoint.m_c[0];
+ astc_results.m_endpoints[1] = ccell_results.m_astc_high_endpoint.m_c[0];
+
+ astc_results.m_endpoints[2] = ccell_results.m_astc_low_endpoint.m_c[3];
+ astc_results.m_endpoints[3] = ccell_results.m_astc_high_endpoint.m_c[3];
+
+ for (uint32_t y = 0; y < 4; y++)
+ for (uint32_t x = 0; x < 4; x++)
+ astc_results.m_weights[x + y * 4] = ccell_result_selectors[x + y * 4];
+
+ color_rgba colors[16];
+ for (uint32_t c = 0; c < 4; c++)
+ {
+ colors[0].m_comps[c] = g_astc_unquant[endpoint_range][ccell_results.m_astc_low_endpoint.m_c[(c < 3) ? 0 : 3]].m_unquant;
+ colors[15].m_comps[c] = g_astc_unquant[endpoint_range][ccell_results.m_astc_high_endpoint.m_c[(c < 3) ? 0 : 3]].m_unquant;
+ }
+
+ for (uint32_t i = 1; i < 16 - 1; i++)
+ for (uint32_t c = 0; c < 4; c++)
+ colors[i].m_comps[c] = (uint8_t)astc_interpolate(colors[0].m_comps[c], colors[15].m_comps[c], g_astc_weights4[i], false);
+
+ uint64_t total_err = 0;
+ for (uint32_t p = 0; p < 16; p++)
+ total_err += color_distance_la(((const color_rgba*)block)[p], colors[ccell_result_selectors[p]]);
+
+ assert(total_results < MAX_ENCODE_RESULTS);
+ if (total_results < MAX_ENCODE_RESULTS)
+ {
+ pResults[total_results].m_uastc_mode = 15;
+ pResults[total_results].m_common_pattern = 0;
+ pResults[total_results].m_astc = astc_results;
+ pResults[total_results].m_astc_err = total_err;
+ total_results++;
+ }
+ }
+
+ static void compute_block_error(const color_rgba block[4][4], const color_rgba decoded_block[4][4], uint64_t &total_rgb_err, uint64_t &total_rgba_err, uint64_t &total_la_err)
+ {
+ uint64_t total_err_r = 0, total_err_g = 0, total_err_b = 0, total_err_a = 0;
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const int dr = (int)block[y][x].m_comps[0] - (int)decoded_block[y][x].m_comps[0];
+ const int dg = (int)block[y][x].m_comps[1] - (int)decoded_block[y][x].m_comps[1];
+ const int db = (int)block[y][x].m_comps[2] - (int)decoded_block[y][x].m_comps[2];
+ const int da = (int)block[y][x].m_comps[3] - (int)decoded_block[y][x].m_comps[3];
+
+ total_err_r += dr * dr;
+ total_err_g += dg * dg;
+ total_err_b += db * db;
+ total_err_a += da * da;
+ }
+ }
+
+ total_la_err = total_err_r + total_err_a;
+ total_rgb_err = total_err_r + total_err_g + total_err_b;
+ total_rgba_err = total_rgb_err + total_err_a;
+ }
+
+ static void compute_bc1_hints(bool &bc1_hint0, bool &bc1_hint1, const uastc_encode_results &best_results, const color_rgba block[4][4], const color_rgba decoded_uastc_block[4][4])
+ {
+ const uint32_t best_mode = best_results.m_uastc_mode;
+ const bool perceptual = false;
+
+ bc1_hint0 = false;
+ bc1_hint1 = false;
+
+ if (best_mode == UASTC_MODE_INDEX_SOLID_COLOR)
+ return;
+
+ if (!g_uastc_mode_has_bc1_hint0[best_mode] && !g_uastc_mode_has_bc1_hint1[best_mode])
+ return;
+
+ color_rgba tblock_bc1[4][4];
+ dxt1_block tbc1_block[8];
+ basist::encode_bc1(tbc1_block, (const uint8_t*)&decoded_uastc_block[0][0], 0);
+ unpack_block(texture_format::cBC1, tbc1_block, &tblock_bc1[0][0]);
+
+ color_rgba tblock_hint0_bc1[4][4];
+ color_rgba tblock_hint1_bc1[4][4];
+
+ etc_block etc1_blk;
+ memset(&etc1_blk, 0, sizeof(etc1_blk));
+
+ eac_a8_block etc2_blk;
+ memset(&etc2_blk, 0, sizeof(etc2_blk));
+ etc2_blk.m_multiplier = 1;
+
+ // Pack to UASTC, then unpack, because the endpoints may be swapped.
+
+ uastc_block temp_ublock;
+ pack_uastc(temp_ublock, best_results, etc1_blk, 0, etc2_blk, false, false);
+
+ unpacked_uastc_block temp_ublock_unpacked;
+ unpack_uastc(temp_ublock, temp_ublock_unpacked, false);
+
+ unpacked_uastc_block ublock;
+ memset(&ublock, 0, sizeof(ublock));
+ ublock.m_mode = best_results.m_uastc_mode;
+ ublock.m_common_pattern = best_results.m_common_pattern;
+ ublock.m_astc = temp_ublock_unpacked.m_astc;
+
+ dxt1_block b;
+
+ // HINT1
+ if (!g_uastc_mode_has_bc1_hint1[best_mode])
+ {
+ memset(tblock_hint1_bc1, 0, sizeof(tblock_hint1_bc1));
+ }
+ else
+ {
+ transcode_uastc_to_bc1_hint1(ublock, (color32 (*)[4]) decoded_uastc_block, &b, false);
+
+ unpack_block(texture_format::cBC1, &b, &tblock_hint1_bc1[0][0]);
+ }
+
+ // HINT0
+ if (!g_uastc_mode_has_bc1_hint0[best_mode])
+ {
+ memset(tblock_hint0_bc1, 0, sizeof(tblock_hint0_bc1));
+ }
+ else
+ {
+ transcode_uastc_to_bc1_hint0(ublock, &b);
+
+ unpack_block(texture_format::cBC1, &b, &tblock_hint0_bc1[0][0]);
+ }
+
+ // Compute block errors
+ uint64_t total_t_err = 0, total_hint0_err = 0, total_hint1_err = 0;
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ total_t_err += color_distance(perceptual, block[y][x], tblock_bc1[y][x], false);
+ total_hint0_err += color_distance(perceptual, block[y][x], tblock_hint0_bc1[y][x], false);
+ total_hint1_err += color_distance(perceptual, block[y][x], tblock_hint1_bc1[y][x], false);
+ }
+ }
+
+ const float t_err = sqrtf((float)total_t_err);
+ const float t_err_hint0 = sqrtf((float)total_hint0_err);
+ const float t_err_hint1 = sqrtf((float)total_hint1_err);
+
+ const float err_thresh0 = 1.075f;
+ const float err_thresh1 = 1.075f;
+
+ if ((g_uastc_mode_has_bc1_hint0[best_mode]) && (t_err_hint0 <= t_err * err_thresh0))
+ bc1_hint0 = true;
+
+ if ((g_uastc_mode_has_bc1_hint1[best_mode]) && (t_err_hint1 <= t_err * err_thresh1))
+ bc1_hint1 = true;
+ }
+
+ struct ycbcr
+ {
+ int32_t m_y;
+ int32_t m_cb;
+ int32_t m_cr;
+ };
+
+ static inline void rgb_to_y_cb_cr(const color_rgba& c, ycbcr& dst)
+ {
+ const int y = c.r * 54 + c.g * 183 + c.b * 19;
+ dst.m_y = y;
+ dst.m_cb = (c.b << 8) - y;
+ dst.m_cr = (c.r << 8) - y;
+ }
+
+ static inline uint64_t color_diff(const ycbcr& a, const ycbcr& b)
+ {
+ const int y_delta = a.m_y - b.m_y;
+ const int cb_delta = a.m_cb - b.m_cb;
+ const int cr_delta = a.m_cr - b.m_cr;
+ return ((int64_t)y_delta * y_delta * 4) + ((int64_t)cr_delta * cr_delta) + ((int64_t)cb_delta * cb_delta);
+ }
+
+ static inline int gray_distance2(const color_rgba& c, int r, int g, int b)
+ {
+ int gray_dist = (((int)c[0] - r) + ((int)c[1] - g) + ((int)c[2] - b) + 1) / 3;
+
+ int gray_point_r = clamp255(r + gray_dist);
+ int gray_point_g = clamp255(g + gray_dist);
+ int gray_point_b = clamp255(b + gray_dist);
+
+ int dist_to_gray_point_r = c[0] - gray_point_r;
+ int dist_to_gray_point_g = c[1] - gray_point_g;
+ int dist_to_gray_point_b = c[2] - gray_point_b;
+
+ return (dist_to_gray_point_r * dist_to_gray_point_r) + (dist_to_gray_point_g * dist_to_gray_point_g) + (dist_to_gray_point_b * dist_to_gray_point_b);
+ }
+
+ static bool pack_etc1_estimate_flipped(const color_rgba* pSrc_pixels)
+ {
+ int sums[3][2][2];
+
+#define GET_XY(x, y, c) pSrc_pixels[(x) + ((y) * 4)][c]
+
+ for (uint32_t c = 0; c < 3; c++)
+ {
+ sums[c][0][0] = GET_XY(0, 0, c) + GET_XY(0, 1, c) + GET_XY(1, 0, c) + GET_XY(1, 1, c);
+ sums[c][1][0] = GET_XY(2, 0, c) + GET_XY(2, 1, c) + GET_XY(3, 0, c) + GET_XY(3, 1, c);
+ sums[c][0][1] = GET_XY(0, 2, c) + GET_XY(0, 3, c) + GET_XY(1, 2, c) + GET_XY(1, 3, c);
+ sums[c][1][1] = GET_XY(2, 2, c) + GET_XY(2, 3, c) + GET_XY(3, 2, c) + GET_XY(3, 3, c);
+ }
+
+ int upper_avg[3], lower_avg[3], left_avg[3], right_avg[3];
+ for (uint32_t c = 0; c < 3; c++)
+ {
+ upper_avg[c] = (sums[c][0][0] + sums[c][1][0] + 4) / 8;
+ lower_avg[c] = (sums[c][0][1] + sums[c][1][1] + 4) / 8;
+ left_avg[c] = (sums[c][0][0] + sums[c][0][1] + 4) / 8;
+ right_avg[c] = (sums[c][1][0] + sums[c][1][1] + 4) / 8;
+ }
+
+#undef GET_XY
+#define GET_XY(x, y, a) gray_distance2(pSrc_pixels[(x) + ((y) * 4)], a[0], a[1], a[2])
+
+ int upper_gray_dist = 0, lower_gray_dist = 0, left_gray_dist = 0, right_gray_dist = 0;
+ for (uint32_t i = 0; i < 4; i++)
+ {
+ for (uint32_t j = 0; j < 2; j++)
+ {
+ upper_gray_dist += GET_XY(i, j, upper_avg);
+ lower_gray_dist += GET_XY(i, 2 + j, lower_avg);
+ left_gray_dist += GET_XY(j, i, left_avg);
+ right_gray_dist += GET_XY(2 + j, i, right_avg);
+ }
+ }
+
+#undef GET_XY
+
+ int upper_lower_sum = upper_gray_dist + lower_gray_dist;
+ int left_right_sum = left_gray_dist + right_gray_dist;
+
+ return upper_lower_sum < left_right_sum;
+ }
+
+ static void compute_etc1_hints(etc_block& best_etc1_blk, uint32_t& best_etc1_bias, const uastc_encode_results& best_results, const color_rgba block[4][4], const color_rgba decoded_uastc_block[4][4], int level, uint32_t flags)
+ {
+ best_etc1_bias = 0;
+
+ if (best_results.m_uastc_mode == UASTC_MODE_INDEX_SOLID_COLOR)
+ {
+ pack_etc1_block_solid_color(best_etc1_blk, &best_results.m_solid_color.m_comps[0]);
+ return;
+ }
+
+ const bool faster_etc1 = (flags & cPackUASTCETC1FasterHints) != 0;
+ const bool fastest_etc1 = (flags & cPackUASTCETC1FastestHints) != 0;
+
+ const bool has_bias = g_uastc_mode_has_etc1_bias[best_results.m_uastc_mode];
+
+ // 0 should be at the top, but we need 13 first because it represents bias (0,0,0).
+ const uint8_t s_sorted_bias_modes[32] = { 13, 0, 22, 29, 27, 12, 26, 9, 30, 31, 8, 10, 25, 2, 23, 5, 15, 7, 3, 11, 6, 17, 28, 18, 1, 19, 20, 21, 24, 4, 14, 16 };
+
+ uint32_t last_bias = 1;
+ bool use_faster_bias_mode_table = false;
+ const bool flip_estimate = (level <= cPackUASTCLevelFaster) || (faster_etc1) || (fastest_etc1);
+ if (has_bias)
+ {
+ switch (level)
+ {
+ case cPackUASTCLevelFastest:
+ {
+ last_bias = fastest_etc1 ? 1 : (faster_etc1 ? 1 : 2);
+ use_faster_bias_mode_table = true;
+ break;
+ }
+ case cPackUASTCLevelFaster:
+ {
+ last_bias = fastest_etc1 ? 1 : (faster_etc1 ? 3 : 5);
+ use_faster_bias_mode_table = true;
+ break;
+ }
+ case cPackUASTCLevelDefault:
+ {
+ last_bias = fastest_etc1 ? 1 : (faster_etc1 ? 10 : 20);
+ use_faster_bias_mode_table = true;
+ break;
+ }
+ case cPackUASTCLevelSlower:
+ {
+ last_bias = fastest_etc1 ? 1 : (faster_etc1 ? 16 : 32);
+ use_faster_bias_mode_table = true;
+ break;
+ }
+ default:
+ {
+ last_bias = 32;
+ break;
+ }
+ }
+ }
+
+ memset(&best_etc1_blk, 0, sizeof(best_etc1_blk));
+ uint64_t best_err = UINT64_MAX;
+
+ etc_block trial_block;
+ memset(&trial_block, 0, sizeof(trial_block));
+
+ ycbcr block_ycbcr[4][4], decoded_uastc_block_ycbcr[4][4];
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ rgb_to_y_cb_cr(block[y][x], block_ycbcr[y][x]);
+ rgb_to_y_cb_cr(decoded_uastc_block[y][x], decoded_uastc_block_ycbcr[y][x]);
+ }
+ }
+
+ uint32_t first_flip = 0, last_flip = 2;
+ uint32_t first_individ = 0, last_individ = 2;
+
+ if (flags & cPackUASTCETC1DisableFlipAndIndividual)
+ {
+ last_flip = 1;
+ last_individ = 1;
+ }
+ else if (flip_estimate)
+ {
+ if (pack_etc1_estimate_flipped(&decoded_uastc_block[0][0]))
+ first_flip = 1;
+ last_flip = first_flip + 1;
+ }
+
+ for (uint32_t flip = first_flip; flip < last_flip; flip++)
+ {
+ trial_block.set_flip_bit(flip != 0);
+
+ for (uint32_t individ = first_individ; individ < last_individ; individ++)
+ {
+ const uint32_t mul = individ ? 15 : 31;
+
+ trial_block.set_diff_bit(individ == 0);
+
+ color_rgba unbiased_block_colors[2];
+
+ int min_r[2] = { 255, 255 }, min_g[2] = { 255, 255 }, min_b[2] = { 255, 255 }, max_r[2] = { 0, 0 }, max_g[2] = { 0, 0 }, max_b[2] = { 0, 0 };
+
+ for (uint32_t subset = 0; subset < 2; subset++)
+ {
+ uint32_t avg_color[3];
+ memset(avg_color, 0, sizeof(avg_color));
+
+ for (uint32_t j = 0; j < 8; j++)
+ {
+ const etc_coord2 &c = g_etc1_pixel_coords[flip][subset][j];
+ const color_rgba& p = decoded_uastc_block[c.m_y][c.m_x];
+
+ avg_color[0] += p.r;
+ avg_color[1] += p.g;
+ avg_color[2] += p.b;
+
+ min_r[subset] = std::min<uint32_t>(min_r[subset], p.r);
+ min_g[subset] = std::min<uint32_t>(min_g[subset], p.g);
+ min_b[subset] = std::min<uint32_t>(min_b[subset], p.b);
+
+ max_r[subset] = std::max<uint32_t>(max_r[subset], p.r);
+ max_g[subset] = std::max<uint32_t>(max_g[subset], p.g);
+ max_b[subset] = std::max<uint32_t>(max_b[subset], p.b);
+ } // j
+
+ unbiased_block_colors[subset][0] = (uint8_t)((avg_color[0] * mul + 1020) / (8 * 255));
+ unbiased_block_colors[subset][1] = (uint8_t)((avg_color[1] * mul + 1020) / (8 * 255));
+ unbiased_block_colors[subset][2] = (uint8_t)((avg_color[2] * mul + 1020) / (8 * 255));
+ unbiased_block_colors[subset][3] = 0;
+
+ } // subset
+
+ for (uint32_t bias_iter = 0; bias_iter < last_bias; bias_iter++)
+ {
+ const uint32_t bias = use_faster_bias_mode_table ? s_sorted_bias_modes[bias_iter] : bias_iter;
+
+ color_rgba block_colors[2];
+ for (uint32_t subset = 0; subset < 2; subset++)
+ block_colors[subset] = has_bias ? apply_etc1_bias((color32&)unbiased_block_colors[subset], bias, mul, subset) : unbiased_block_colors[subset];
+
+ if (individ)
+ trial_block.set_block_color4(block_colors[0], block_colors[1]);
+ else
+ trial_block.set_block_color5_clamp(block_colors[0], block_colors[1]);
+
+ uint32_t range[2];
+ for (uint32_t subset = 0; subset < 2; subset++)
+ {
+ const color_rgba base_c(trial_block.get_block_color(subset, true));
+
+ const int pos_r = iabs(max_r[subset] - base_c.r);
+ const int neg_r = iabs(base_c.r - min_r[subset]);
+
+ const int pos_g = iabs(max_g[subset] - base_c.g);
+ const int neg_g = iabs(base_c.g - min_g[subset]);
+
+ const int pos_b = iabs(max_b[subset] - base_c.b);
+ const int neg_b = iabs(base_c.b - min_b[subset]);
+
+ range[subset] = maximum(maximum(pos_r, neg_r, pos_g, neg_g), pos_b, neg_b);
+ }
+
+ uint32_t best_inten_table[2] = { 0, 0 };
+
+ for (uint32_t subset = 0; subset < 2; subset++)
+ {
+ uint64_t best_subset_err = UINT64_MAX;
+
+ const uint32_t inten_table_limit = (level == cPackUASTCLevelVerySlow) ? 8 : ((range[subset] > 51) ? 8 : (range[subset] >= 7 ? 4 : 2));
+
+ for (uint32_t inten_table = 0; inten_table < inten_table_limit; inten_table++)
+ {
+ trial_block.set_inten_table(subset, inten_table);
+
+ color_rgba color_table[4];
+ trial_block.get_block_colors(color_table, subset);
+
+ ycbcr color_table_ycbcr[4];
+ for (uint32_t i = 0; i < 4; i++)
+ rgb_to_y_cb_cr(color_table[i], color_table_ycbcr[i]);
+
+ uint64_t total_error = 0;
+ if (flip)
+ {
+ for (uint32_t y = 0; y < 2; y++)
+ {
+ {
+ const ycbcr& c = decoded_uastc_block_ycbcr[subset * 2 + y][0];
+ total_error += minimum(color_diff(color_table_ycbcr[0], c), color_diff(color_table_ycbcr[1], c), color_diff(color_table_ycbcr[2], c), color_diff(color_table_ycbcr[3], c));
+ }
+ {
+ const ycbcr& c = decoded_uastc_block_ycbcr[subset * 2 + y][1];
+ total_error += minimum(color_diff(color_table_ycbcr[0], c), color_diff(color_table_ycbcr[1], c), color_diff(color_table_ycbcr[2], c), color_diff(color_table_ycbcr[3], c));
+ }
+ {
+ const ycbcr& c = decoded_uastc_block_ycbcr[subset * 2 + y][2];
+ total_error += minimum(color_diff(color_table_ycbcr[0], c), color_diff(color_table_ycbcr[1], c), color_diff(color_table_ycbcr[2], c), color_diff(color_table_ycbcr[3], c));
+ }
+ {
+ const ycbcr& c = decoded_uastc_block_ycbcr[subset * 2 + y][3];
+ total_error += minimum(color_diff(color_table_ycbcr[0], c), color_diff(color_table_ycbcr[1], c), color_diff(color_table_ycbcr[2], c), color_diff(color_table_ycbcr[3], c));
+ }
+ if (total_error >= best_subset_err)
+ break;
+ }
+ }
+ else
+ {
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ {
+ const ycbcr& c = decoded_uastc_block_ycbcr[y][subset * 2 + 0];
+ total_error += minimum(color_diff(color_table_ycbcr[0], c), color_diff(color_table_ycbcr[1], c), color_diff(color_table_ycbcr[2], c), color_diff(color_table_ycbcr[3], c));
+ }
+ {
+ const ycbcr& c = decoded_uastc_block_ycbcr[y][subset * 2 + 1];
+ total_error += minimum(color_diff(color_table_ycbcr[0], c), color_diff(color_table_ycbcr[1], c), color_diff(color_table_ycbcr[2], c), color_diff(color_table_ycbcr[3], c));
+ }
+ }
+ if (total_error >= best_subset_err)
+ break;
+ }
+
+ if (total_error < best_subset_err)
+ {
+ best_subset_err = total_error;
+ best_inten_table[subset] = inten_table;
+ }
+
+ } // inten_table
+
+ } // subset
+
+ trial_block.set_inten_table(0, best_inten_table[0]);
+ trial_block.set_inten_table(1, best_inten_table[1]);
+
+ // Compute error against the ORIGINAL block.
+ uint64_t err = 0;
+
+ for (uint32_t subset = 0; subset < 2; subset++)
+ {
+ color_rgba color_table[4];
+ trial_block.get_block_colors(color_table, subset);
+
+ ycbcr color_table_ycbcr[4];
+ for (uint32_t i = 0; i < 4; i++)
+ rgb_to_y_cb_cr(color_table[i], color_table_ycbcr[i]);
+
+ if (flip)
+ {
+ for (uint32_t y = 0; y < 2; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ const ycbcr& c = decoded_uastc_block_ycbcr[subset * 2 + y][x];
+ const uint64_t best_index_err = minimum(color_diff(color_table_ycbcr[0], c) << 2, (color_diff(color_table_ycbcr[1], c) << 2) + 1, (color_diff(color_table_ycbcr[2], c) << 2) + 2, (color_diff(color_table_ycbcr[3], c) << 2) + 3);
+
+ const uint32_t best_index = (uint32_t)best_index_err & 3;
+ err += color_diff(block_ycbcr[subset * 2 + y][x], color_table_ycbcr[best_index]);
+ }
+ if (err >= best_err)
+ break;
+ }
+ }
+ else
+ {
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 2; x++)
+ {
+ const ycbcr& c = decoded_uastc_block_ycbcr[y][subset * 2 + x];
+ const uint64_t best_index_err = minimum(color_diff(color_table_ycbcr[0], c) << 2, (color_diff(color_table_ycbcr[1], c) << 2) + 1, (color_diff(color_table_ycbcr[2], c) << 2) + 2, (color_diff(color_table_ycbcr[3], c) << 2) + 3);
+
+ const uint32_t best_index = (uint32_t)best_index_err & 3;
+ err += color_diff(block_ycbcr[y][subset * 2 + x], color_table_ycbcr[best_index]);
+ }
+ if (err >= best_err)
+ break;
+ }
+ }
+
+ } // subset
+
+ if (err < best_err)
+ {
+ best_err = err;
+
+ best_etc1_blk = trial_block;
+ best_etc1_bias = bias;
+ }
+
+ } // bias_iter
+
+ } // individ
+
+ } // flip
+ }
+
+ struct uastc_pack_eac_a8_results
+ {
+ uint32_t m_base;
+ uint32_t m_table;
+ uint32_t m_multiplier;
+ };
+
+ static uint64_t uastc_pack_eac_a8(uastc_pack_eac_a8_results& results, const uint8_t* pPixels, uint32_t num_pixels, uint32_t base_search_rad, uint32_t mul_search_rad, uint32_t table_mask)
+ {
+ assert(num_pixels <= 16);
+
+ uint32_t min_alpha = 255, max_alpha = 0;
+ for (uint32_t i = 0; i < num_pixels; i++)
+ {
+ const uint32_t a = pPixels[i];
+ if (a < min_alpha) min_alpha = a;
+ if (a > max_alpha) max_alpha = a;
+ }
+
+ if (min_alpha == max_alpha)
+ {
+ results.m_base = min_alpha;
+ results.m_table = 13;
+ results.m_multiplier = 1;
+ return 0;
+ }
+
+ const uint32_t alpha_range = max_alpha - min_alpha;
+
+ uint64_t best_err = UINT64_MAX;
+
+ for (uint32_t table = 0; table < 16; table++)
+ {
+ if ((table_mask & (1U << table)) == 0)
+ continue;
+
+ const float range = (float)(g_etc2_eac_tables[table][ETC2_EAC_MAX_VALUE_SELECTOR] - g_etc2_eac_tables[table][ETC2_EAC_MIN_VALUE_SELECTOR]);
+ const int center = (int)roundf(lerp((float)min_alpha, (float)max_alpha, (float)(0 - g_etc2_eac_tables[table][ETC2_EAC_MIN_VALUE_SELECTOR]) / range));
+
+ const int base_min = clamp255(center - base_search_rad);
+ const int base_max = clamp255(center + base_search_rad);
+
+ const int mul = (int)roundf(alpha_range / range);
+ const int mul_low = clamp<int>(mul - mul_search_rad, 1, 15);
+ const int mul_high = clamp<int>(mul + mul_search_rad, 1, 15);
+
+ for (int base = base_min; base <= base_max; base++)
+ {
+ for (int multiplier = mul_low; multiplier <= mul_high; multiplier++)
+ {
+ uint64_t total_err = 0;
+
+ for (uint32_t i = 0; i < num_pixels; i++)
+ {
+ const int a = pPixels[i];
+
+ uint32_t best_s_err = UINT32_MAX;
+ //uint32_t best_s = 0;
+ for (uint32_t s = 0; s < 8; s++)
+ {
+ const int v = clamp255((int)multiplier * g_etc2_eac_tables[table][s] + (int)base);
+
+ uint32_t err = iabs(a - v);
+ if (err < best_s_err)
+ {
+ best_s_err = err;
+ //best_s = s;
+ }
+ }
+
+ total_err += best_s_err * best_s_err;
+ if (total_err >= best_err)
+ break;
+ }
+
+ if (total_err < best_err)
+ {
+ best_err = total_err;
+ results.m_base = base;
+ results.m_multiplier = multiplier;
+ results.m_table = table;
+ if (!best_err)
+ return best_err;
+ }
+
+ } // table
+
+ } // multiplier
+
+ } // base
+
+ return best_err;
+ }
+
+ const int32_t DEFAULT_BC7_ERROR_WEIGHT = 50;
+ const float UASTC_ERROR_THRESH = 1.3f;
+
+ void encode_uastc(const uint8_t* pRGBAPixels, uastc_block& output_block, uint32_t flags)
+ {
+ const color_rgba(*block)[4] = reinterpret_cast<const color_rgba(*)[4]>(pRGBAPixels);
+
+ bool solid_color = true, has_alpha = false, is_la = true;
+
+ const color_rgba first_color(block[0][0]);
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ if (block[y][x].a < 255)
+ has_alpha = true;
+
+ if (block[y][x] != first_color)
+ solid_color = false;
+
+ if ((block[y][x].r != block[y][x].g) || (block[y][x].r != block[y][x].b))
+ is_la = false;
+ }
+ }
+
+ if (solid_color)
+ {
+ // Solid color blocks are so common that we handle them specially and as quickly as we can.
+ uastc_encode_results solid_results;
+ solid_results.m_uastc_mode = UASTC_MODE_INDEX_SOLID_COLOR;
+ solid_results.m_astc_err = 0;
+ solid_results.m_common_pattern = 0;
+ solid_results.m_solid_color = first_color;
+ memset(&solid_results.m_astc, 0, sizeof(solid_results.m_astc));
+
+ etc_block etc1_blk;
+ uint32_t etc1_bias = 0;
+
+ pack_etc1_block_solid_color(etc1_blk, &first_color.m_comps[0]);
+
+ eac_a8_block eac_a8_blk;
+ eac_a8_blk.m_table = 0;
+ eac_a8_blk.m_multiplier = 1;
+
+ pack_uastc(output_block, solid_results, etc1_blk, etc1_bias, eac_a8_blk, false, false);
+
+ return;
+ }
+
+ int level = flags & 7;
+ const bool favor_uastc_error = (flags & cPackUASTCFavorUASTCError) != 0;
+ const bool favor_bc7_error = !favor_uastc_error && ((flags & cPackUASTCFavorBC7Error) != 0);
+ //const bool etc1_perceptual = true;
+
+ uastc_encode_results results[MAX_ENCODE_RESULTS];
+
+ level = clampi(level, cPackUASTCLevelFastest, cPackUASTCLevelVerySlow);
+
+ // Set all options to slowest, then configure from there depending on the selected level.
+ uint32_t mode_mask = UINT32_MAX;
+ uint32_t uber_level = 6;
+ bool estimate_partition = false;
+ bool always_try_alpha_modes = true;
+ uint32_t eac_a8_mul_search_rad = 3;
+ uint32_t eac_a8_table_mask = UINT32_MAX;
+ uint32_t least_squares_passes = 2;
+ bool bc1_hints = true;
+ bool only_use_la_on_transparent_blocks = false;
+
+ switch (level)
+ {
+ case cPackUASTCLevelFastest:
+ {
+ mode_mask = (1 << 0) | (1 << 8) |
+ (1 << 11) | (1 << 12) |
+ (1 << 15);
+ always_try_alpha_modes = false;
+ eac_a8_mul_search_rad = 0;
+ eac_a8_table_mask = (1 << 2) | (1 << 8) | (1 << 11) | (1 << 13);
+ uber_level = 0;
+ least_squares_passes = 1;
+ bc1_hints = false;
+ estimate_partition = true;
+ only_use_la_on_transparent_blocks = true;
+ break;
+ }
+ case cPackUASTCLevelFaster:
+ {
+ mode_mask = (1 << 0) | (1 << 4) | (1 << 6) | (1 << 8) |
+ (1 << 9) | (1 << 11) | (1 << 12) |
+ (1 << 15) | (1 << 17);
+ always_try_alpha_modes = false;
+ eac_a8_mul_search_rad = 0;
+ eac_a8_table_mask = (1 << 2) | (1 << 8) | (1 << 11) | (1 << 13);
+ uber_level = 0;
+ least_squares_passes = 1;
+ estimate_partition = true;
+ break;
+ }
+ case cPackUASTCLevelDefault:
+ {
+ mode_mask = (1 << 0) | (1 << 1) | (1 << 4) | (1 << 5) | (1 << 6) | (1 << 8) |
+ (1 << 9) | (1 << 10) | (1 << 11) | (1 << 12) | (1 << 13) |
+ (1 << 15) | (1 << 16) | (1 << 17);
+ always_try_alpha_modes = false;
+ eac_a8_mul_search_rad = 1;
+ eac_a8_table_mask = (1 << 0) | (1 << 2) | (1 << 6) | (1 << 7) | (1 << 8) | (1 << 10) | (1 << 11) | (1 << 13);
+ uber_level = 1;
+ least_squares_passes = 1;
+ estimate_partition = true;
+ break;
+ }
+ case cPackUASTCLevelSlower:
+ {
+ always_try_alpha_modes = false;
+ eac_a8_mul_search_rad = 2;
+ uber_level = 3;
+ estimate_partition = true;
+ break;
+ }
+ case cPackUASTCLevelVerySlow:
+ {
+ break;
+ }
+ }
+
+#if BASISU_SUPPORT_FORCE_MODE
+ static int force_mode = -1;
+ force_mode = (force_mode + 1) % TOTAL_UASTC_MODES;
+ mode_mask = UINT32_MAX;
+ always_try_alpha_modes = true;
+ only_use_la_on_transparent_blocks = false;
+#endif
+
+ // HACK HACK
+ //mode_mask &= ~(1 << 18);
+ //mode_mask = (1 << 18)| (1 << 10);
+
+ uint32_t total_results = 0;
+
+ if (only_use_la_on_transparent_blocks)
+ {
+ if ((is_la) && (!has_alpha))
+ is_la = false;
+ }
+
+ const bool try_alpha_modes = has_alpha || always_try_alpha_modes;
+
+ bc7enc_compress_block_params comp_params;
+ memset(&comp_params, 0, sizeof(comp_params));
+ comp_params.m_max_partitions_mode1 = 64;
+ comp_params.m_least_squares_passes = least_squares_passes;
+ comp_params.m_weights[0] = 1;
+ comp_params.m_weights[1] = 1;
+ comp_params.m_weights[2] = 1;
+ comp_params.m_weights[3] = 1;
+ comp_params.m_uber_level = uber_level;
+
+ if (is_la)
+ {
+ if (mode_mask & (1U << 15))
+ astc_mode15(block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 16))
+ astc_mode9_or_16(16, block, results, total_results, comp_params, estimate_partition ? 4 : 0);
+
+ if (mode_mask & (1U << 17))
+ astc_mode11_or_17(17, block, results, total_results, comp_params);
+ }
+
+ if (!has_alpha)
+ {
+ if (mode_mask & (1U << 0))
+ astc_mode0_or_18(0, block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 1))
+ astc_mode1(block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 2))
+ astc_mode2(block, results, total_results, comp_params, estimate_partition);
+
+ if (mode_mask & (1U << 3))
+ astc_mode3(block, results, total_results, comp_params, estimate_partition);
+
+ if (mode_mask & (1U << 4))
+ astc_mode4(block, results, total_results, comp_params, estimate_partition);
+
+ if (mode_mask & (1U << 5))
+ astc_mode5(block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 6))
+ astc_mode6(block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 7))
+ astc_mode7(block, results, total_results, comp_params, estimate_partition);
+
+ if (mode_mask & (1U << 18))
+ astc_mode0_or_18(18, block, results, total_results, comp_params);
+ }
+
+ if (try_alpha_modes)
+ {
+ if (mode_mask & (1U << 9))
+ astc_mode9_or_16(9, block, results, total_results, comp_params, estimate_partition ? 4 : 0);
+
+ if (mode_mask & (1U << 10))
+ astc_mode10(block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 11))
+ astc_mode11_or_17(11, block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 12))
+ astc_mode12(block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 13))
+ astc_mode13(block, results, total_results, comp_params);
+
+ if (mode_mask & (1U << 14))
+ astc_mode14(block, results, total_results, comp_params);
+ }
+
+ assert(total_results);
+
+ // Fix up the errors so we consistently have LA, RGB, or RGBA error.
+ for (uint32_t i = 0; i < total_results; i++)
+ {
+ uastc_encode_results& r = results[i];
+ if (!is_la)
+ {
+ if (g_uastc_mode_is_la[r.m_uastc_mode])
+ {
+ color_rgba unpacked_block[16];
+ unpack_uastc(r.m_uastc_mode, r.m_common_pattern, r.m_solid_color.get_color32(), r.m_astc, (basist::color32 *)unpacked_block, false);
+
+ uint64_t total_err = 0;
+ for (uint32_t j = 0; j < 16; j++)
+ total_err += color_distance(unpacked_block[j], ((const color_rgba*)block)[j], true);
+
+ r.m_astc_err = total_err;
+ }
+ }
+ else
+ {
+ if (!g_uastc_mode_is_la[r.m_uastc_mode])
+ {
+ color_rgba unpacked_block[16];
+ unpack_uastc(r.m_uastc_mode, r.m_common_pattern, r.m_solid_color.get_color32(), r.m_astc, (basist::color32 *)unpacked_block, false);
+
+ uint64_t total_err = 0;
+ for (uint32_t j = 0; j < 16; j++)
+ total_err += color_distance_la(unpacked_block[j], ((const color_rgba*)block)[j]);
+
+ r.m_astc_err = total_err;
+ }
+ }
+ }
+
+ unpacked_uastc_block unpacked_ublock;
+ memset(&unpacked_ublock, 0, sizeof(unpacked_ublock));
+
+ uint64_t total_overall_err[MAX_ENCODE_RESULTS];
+ float uastc_err_f[MAX_ENCODE_RESULTS];
+ double best_uastc_err_f = 1e+20f;
+
+ int best_index = -1;
+
+ if (total_results == 1)
+ {
+ best_index = 0;
+ }
+ else
+ {
+ const uint32_t bc7_err_weight = favor_bc7_error ? 100 : ((favor_uastc_error ? 0 : DEFAULT_BC7_ERROR_WEIGHT));
+ const uint32_t uastc_err_weight = favor_bc7_error ? 0 : 100;
+
+ // Find best overall results, balancing UASTC and UASTC->BC7 error.
+ // We purposely allow UASTC error to increase a little, if doing so lowers the BC7 error.
+ for (uint32_t i = 0; i < total_results; i++)
+ {
+#if BASISU_SUPPORT_FORCE_MODE
+ if (results[i].m_uastc_mode == force_mode)
+ {
+ best_index = i;
+ break;
+ }
+#endif
+
+ unpacked_ublock.m_mode = results[i].m_uastc_mode;
+ unpacked_ublock.m_astc = results[i].m_astc;
+ unpacked_ublock.m_common_pattern = results[i].m_common_pattern;
+ unpacked_ublock.m_solid_color = results[i].m_solid_color.get_color32();
+
+ color_rgba decoded_uastc_block[4][4];
+ bool success = unpack_uastc(results[i].m_uastc_mode, results[i].m_common_pattern, results[i].m_solid_color.get_color32(), results[i].m_astc, (basist::color32 *)&decoded_uastc_block[0][0], false);
+ (void)success;
+ VALIDATE(success);
+
+ uint64_t total_uastc_rgb_err, total_uastc_rgba_err, total_uastc_la_err;
+ compute_block_error(block, decoded_uastc_block, total_uastc_rgb_err, total_uastc_rgba_err, total_uastc_la_err);
+
+ // Validate the computed error, or we're go mad if it's inaccurate.
+ if (results[i].m_uastc_mode == UASTC_MODE_INDEX_SOLID_COLOR)
+ {
+ VALIDATE(total_uastc_rgba_err == 0);
+ }
+ else if (is_la)
+ {
+ VALIDATE(total_uastc_la_err == results[i].m_astc_err);
+ }
+ else if (g_uastc_mode_has_alpha[results[i].m_uastc_mode])
+ {
+ VALIDATE(total_uastc_rgba_err == results[i].m_astc_err);
+ }
+ else
+ {
+ VALIDATE(total_uastc_rgb_err == results[i].m_astc_err);
+ }
+
+ // Transcode to BC7
+ bc7_optimization_results bc7_results;
+ transcode_uastc_to_bc7(unpacked_ublock, bc7_results);
+
+ bc7_block bc7_data;
+ encode_bc7_block(&bc7_data, &bc7_results);
+
+ color_rgba decoded_bc7_block[4][4];
+ unpack_block(texture_format::cBC7, &bc7_data, &decoded_bc7_block[0][0]);
+
+ // Compute BC7 error
+ uint64_t total_bc7_la_err, total_bc7_rgb_err, total_bc7_rgba_err;
+ compute_block_error(block, decoded_bc7_block, total_bc7_rgb_err, total_bc7_rgba_err, total_bc7_la_err);
+
+ if (results[i].m_uastc_mode == UASTC_MODE_INDEX_SOLID_COLOR)
+ {
+ VALIDATE(total_bc7_rgba_err == 0);
+
+ best_index = i;
+ break;
+ }
+
+ uint64_t total_uastc_err = 0, total_bc7_err = 0;
+ if (is_la)
+ {
+ total_bc7_err = total_bc7_la_err;
+ total_uastc_err = total_uastc_la_err;
+ }
+ else if (has_alpha)
+ {
+ total_bc7_err = total_bc7_rgba_err;
+ total_uastc_err = total_uastc_rgba_err;
+ }
+ else
+ {
+ total_bc7_err = total_bc7_rgb_err;
+ total_uastc_err = total_uastc_rgb_err;
+ }
+
+ total_overall_err[i] = ((total_bc7_err * bc7_err_weight) / 100) + ((total_uastc_err * uastc_err_weight) / 100);
+ if (!total_overall_err[i])
+ {
+ best_index = i;
+ break;
+ }
+
+ uastc_err_f[i] = sqrtf((float)total_uastc_err);
+
+ if (uastc_err_f[i] < best_uastc_err_f)
+ {
+ best_uastc_err_f = uastc_err_f[i];
+ }
+
+ } // total_results
+
+ if (best_index < 0)
+ {
+ uint64_t best_err = UINT64_MAX;
+
+ if ((best_uastc_err_f == 0.0f) || (favor_bc7_error))
+ {
+ for (uint32_t i = 0; i < total_results; i++)
+ {
+ if (total_overall_err[i] < best_err)
+ {
+ best_err = total_overall_err[i];
+ best_index = i;
+ if (!best_err)
+ break;
+ }
+ } // i
+ }
+ else
+ {
+ // Scan the UASTC results, and consider all results within a window that has the best UASTC+BC7 error.
+ for (uint32_t i = 0; i < total_results; i++)
+ {
+ double err_delta = uastc_err_f[i] / best_uastc_err_f;
+
+ if (err_delta <= UASTC_ERROR_THRESH)
+ {
+ if (total_overall_err[i] < best_err)
+ {
+ best_err = total_overall_err[i];
+ best_index = i;
+ if (!best_err)
+ break;
+ }
+ }
+ } // i
+ }
+ }
+ }
+
+ const uastc_encode_results& best_results = results[best_index];
+ const uint32_t best_mode = best_results.m_uastc_mode;
+ const astc_block_desc& best_astc_results = best_results.m_astc;
+
+ color_rgba decoded_uastc_block[4][4];
+ bool success = unpack_uastc(best_mode, best_results.m_common_pattern, best_results.m_solid_color.get_color32(), best_astc_results, (basist::color32 *)&decoded_uastc_block[0][0], false);
+ (void)success;
+ VALIDATE(success);
+
+#if BASISU_VALIDATE_UASTC_ENC
+ // Make sure that the UASTC block unpacks to the same exact pixels as the ASTC block does, using two different decoders.
+ {
+ // Round trip to packed UASTC and back, then decode to pixels.
+ etc_block etc1_blk;
+ memset(&etc1_blk, 0, sizeof(etc1_blk));
+ eac_a8_block etc_eac_a8_blk;
+ memset(&etc_eac_a8_blk, 0, sizeof(etc_eac_a8_blk));
+ etc_eac_a8_blk.m_multiplier = 1;
+
+ basist::uastc_block temp_block;
+ pack_uastc(temp_block, best_results, etc1_blk, 0, etc_eac_a8_blk, false, false);
+
+ basist::color32 temp_block_unpacked[4][4];
+ success = basist::unpack_uastc(temp_block, (basist::color32 *)temp_block_unpacked, false);
+ VALIDATE(success);
+
+ // Now round trip to packed ASTC and back, then decode to pixels.
+ uint32_t astc_data[4];
+
+ if (best_results.m_uastc_mode == UASTC_MODE_INDEX_SOLID_COLOR)
+ pack_astc_solid_block(astc_data, (color32 &)best_results.m_solid_color);
+ else
+ {
+ success = pack_astc_block(astc_data, &best_astc_results, best_results.m_uastc_mode);
+ VALIDATE(success);
+ }
+
+ color_rgba decoded_astc_block[4][4];
+ success = basisu_astc::astc::decompress((uint8_t*)decoded_astc_block, (uint8_t*)&astc_data, false, 4, 4);
+ VALIDATE(success);
+
+ for (uint32_t y = 0; y < 4; y++)
+ {
+ for (uint32_t x = 0; x < 4; x++)
+ {
+ VALIDATE(decoded_astc_block[y][x] == decoded_uastc_block[y][x]);
+
+ VALIDATE(temp_block_unpacked[y][x].c[0] == decoded_uastc_block[y][x].r);
+ VALIDATE(temp_block_unpacked[y][x].c[1] == decoded_uastc_block[y][x].g);
+ VALIDATE(temp_block_unpacked[y][x].c[2] == decoded_uastc_block[y][x].b);
+ VALIDATE(temp_block_unpacked[y][x].c[3] == decoded_uastc_block[y][x].a);
+ }
+ }
+ }
+#endif
+
+ // Compute BC1 hints
+ bool bc1_hint0 = false, bc1_hint1 = false;
+ if (bc1_hints)
+ compute_bc1_hints(bc1_hint0, bc1_hint1, best_results, block, decoded_uastc_block);
+
+ eac_a8_block eac_a8_blk;
+ if ((g_uastc_mode_has_alpha[best_mode]) && (best_mode != UASTC_MODE_INDEX_SOLID_COLOR))
+ {
+ // Compute ETC2 hints
+ uint8_t decoded_uastc_block_alpha[16];
+ for (uint32_t i = 0; i < 16; i++)
+ decoded_uastc_block_alpha[i] = decoded_uastc_block[i >> 2][i & 3].a;
+
+ uastc_pack_eac_a8_results eac8_a8_results;
+ memset(&eac8_a8_results, 0, sizeof(eac8_a8_results));
+ uastc_pack_eac_a8(eac8_a8_results, decoded_uastc_block_alpha, 16, 0, eac_a8_mul_search_rad, eac_a8_table_mask);
+
+ // All we care about for hinting is the table and multiplier.
+ eac_a8_blk.m_table = eac8_a8_results.m_table;
+ eac_a8_blk.m_multiplier = eac8_a8_results.m_multiplier;
+ }
+ else
+ {
+ memset(&eac_a8_blk, 0, sizeof(eac_a8_blk));
+ }
+
+ // Compute ETC1 hints
+ etc_block etc1_blk;
+ uint32_t etc1_bias = 0;
+ compute_etc1_hints(etc1_blk, etc1_bias, best_results, block, decoded_uastc_block, level, flags);
+
+ // Finally, pack the UASTC block with its hints and we're done.
+ pack_uastc(output_block, best_results, etc1_blk, etc1_bias, eac_a8_blk, bc1_hint0, bc1_hint1);
+ }
+ static bool uastc_recompute_hints(basist::uastc_block* pBlock, const color_rgba* pBlock_pixels, uint32_t flags, const unpacked_uastc_block *pUnpacked_blk)
+ {
+ unpacked_uastc_block unpacked_blk;
+
+ if (pUnpacked_blk)
+ unpacked_blk = *pUnpacked_blk;
+ else
+ {
+ if (!unpack_uastc(*pBlock, unpacked_blk, false, true))
+ return false;
+ }
+ color_rgba decoded_uastc_block[4][4];
+ if (!unpack_uastc(unpacked_blk, (basist::color32 *)decoded_uastc_block, false))
+ return false;
+ uastc_encode_results results;
+ results.m_uastc_mode = unpacked_blk.m_mode;
+ results.m_common_pattern = unpacked_blk.m_common_pattern;
+ results.m_astc = unpacked_blk.m_astc;
+ results.m_solid_color = unpacked_blk.m_solid_color;
+ results.m_astc_err = 0;
+ bool bc1_hints = true;
+ uint32_t eac_a8_mul_search_rad = 3;
+ uint32_t eac_a8_table_mask = UINT32_MAX;
+ const uint32_t level = flags & cPackUASTCLevelMask;
+ switch (level)
+ {
+ case cPackUASTCLevelFastest:
+ {
+ eac_a8_mul_search_rad = 0;
+ eac_a8_table_mask = (1 << 2) | (1 << 8) | (1 << 11) | (1 << 13);
+ bc1_hints = false;
+ break;
+ }
+ case cPackUASTCLevelFaster:
+ {
+ eac_a8_mul_search_rad = 0;
+ eac_a8_table_mask = (1 << 2) | (1 << 8) | (1 << 11) | (1 << 13);
+ break;
+ }
+ case cPackUASTCLevelDefault:
+ {
+ eac_a8_mul_search_rad = 1;
+ eac_a8_table_mask = (1 << 0) | (1 << 2) | (1 << 6) | (1 << 7) | (1 << 8) | (1 << 10) | (1 << 11) | (1 << 13);
+ break;
+ }
+ case cPackUASTCLevelSlower:
+ {
+ eac_a8_mul_search_rad = 2;
+ break;
+ }
+ case cPackUASTCLevelVerySlow:
+ {
+ break;
+ }
+ }
+ bool bc1_hint0 = false, bc1_hint1 = false;
+ if (bc1_hints)
+ compute_bc1_hints(bc1_hint0, bc1_hint1, results, (color_rgba (*)[4])pBlock_pixels, decoded_uastc_block);
+ const uint32_t best_mode = unpacked_blk.m_mode;
+ eac_a8_block eac_a8_blk;
+ if ((g_uastc_mode_has_alpha[best_mode]) && (best_mode != UASTC_MODE_INDEX_SOLID_COLOR))
+ {
+ uint8_t decoded_uastc_block_alpha[16];
+ for (uint32_t i = 0; i < 16; i++)
+ decoded_uastc_block_alpha[i] = decoded_uastc_block[i >> 2][i & 3].a;
+ uastc_pack_eac_a8_results eac8_a8_results;
+ memset(&eac8_a8_results, 0, sizeof(eac8_a8_results));
+ uastc_pack_eac_a8(eac8_a8_results, decoded_uastc_block_alpha, 16, 0, eac_a8_mul_search_rad, eac_a8_table_mask);
+ eac_a8_blk.m_table = eac8_a8_results.m_table;
+ eac_a8_blk.m_multiplier = eac8_a8_results.m_multiplier;
+ }
+ else
+ {
+ memset(&eac_a8_blk, 0, sizeof(eac_a8_blk));
+ }
+ etc_block etc1_blk;
+ uint32_t etc1_bias = 0;
+ compute_etc1_hints(etc1_blk, etc1_bias, results, (color_rgba (*)[4])pBlock_pixels, decoded_uastc_block, level, flags);
+ pack_uastc(*pBlock, results, etc1_blk, etc1_bias, eac_a8_blk, bc1_hint0, bc1_hint1);
+ return true;
+ }
+ static const uint8_t g_uastc_mode_selector_bits[TOTAL_UASTC_MODES][2] =
+ {
+ { 65, 63 }, { 69, 31 }, { 73, 46 }, { 89, 29 },
+ { 89, 30 }, { 68, 47 }, { 66, 62 }, { 89, 30 },
+ { 0, 0 }, { 97, 30 }, { 65, 63 }, { 66, 62 },
+ { 81, 47 }, { 94, 30 }, { 92, 31 }, { 62, 63 },
+ { 98, 30 }, { 61, 62 }, { 49, 79 }
+ };
+ static inline uint32_t set_block_bits(uint8_t* pBytes, uint64_t val, uint32_t num_bits, uint32_t cur_ofs)
+ {
+ assert(num_bits <= 64);
+ assert((num_bits == 64) || (val < (1ULL << num_bits)));
+ uint64_t mask = (num_bits == 64) ? UINT64_MAX : ((1ULL << num_bits) - 1);
+ while (num_bits)
+ {
+ const uint32_t n = basisu::minimum<uint32_t>(8U - (cur_ofs & 7U), num_bits);
+ pBytes[cur_ofs >> 3] &= ~static_cast<uint8_t>(mask << (cur_ofs & 7U));
+ pBytes[cur_ofs >> 3] |= static_cast<uint8_t>(val << (cur_ofs & 7U));
+ val >>= n;
+ mask >>= n;
+ num_bits -= n;
+ cur_ofs += n;
+ }
+ return cur_ofs;
+ }
+ static const uint8_t g_tdefl_small_dist_extra[512] =
+ {
+ 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5,
+ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7
+ };
+ static const uint8_t g_tdefl_large_dist_extra[128] =
+ {
+ 0, 0, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+ 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+ 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13
+ };
+ static inline uint32_t compute_match_cost_estimate(uint32_t dist)
+ {
+ uint32_t len_cost = 7;
+ uint32_t dist_cost = 5;
+ if (dist < 512)
+ dist_cost += g_tdefl_small_dist_extra[dist & 511];
+ else
+ {
+ dist_cost += g_tdefl_large_dist_extra[std::min<uint32_t>(dist, 32767) >> 8];
+ while (dist >= 32768)
+ {
+ dist_cost++;
+ dist >>= 1;
+ }
+ }
+ return len_cost + dist_cost;
+ }
+ struct selector_bitsequence
+ {
+ uint64_t m_sel;
+ uint32_t m_ofs;
+ selector_bitsequence() { }
+ selector_bitsequence(uint32_t bit_ofs, uint64_t sel) : m_sel(sel), m_ofs(bit_ofs) { }
+ bool operator== (const selector_bitsequence& other) const
+ {
+ return (m_ofs == other.m_ofs) && (m_sel == other.m_sel);
+ }
+
+ bool operator< (const selector_bitsequence& other) const
+ {
+ if (m_ofs < other.m_ofs)
+ return true;
+ else if (m_ofs == other.m_ofs)
+ return m_sel < other.m_sel;
+
+ return false;
+ }
+ };
+
+ struct selector_bitsequence_hash
+ {
+ std::size_t operator()(selector_bitsequence const& s) const noexcept
+ {
+ return hash_hsieh((uint8_t *)&s, sizeof(s)) ^ s.m_sel;
+ }
+ };
+
+ static bool uastc_rdo_blocks(uint32_t first_index, uint32_t last_index, basist::uastc_block* pBlocks, const color_rgba* pBlock_pixels, const uastc_rdo_params& params, uint32_t flags,
+ uint32_t &total_skipped, uint32_t &total_refined, uint32_t &total_modified)
+ {
+ debug_printf("uastc_rdo_blocks: Processing blocks %u to %u\n", first_index, last_index);
+
+ const int total_blocks_to_check = std::max<uint32_t>(1U, params.m_lz_dict_size / sizeof(basist::uastc_block));
+ const bool perceptual = false;
+
+ std::unordered_map<selector_bitsequence, uint32_t, selector_bitsequence_hash> selector_history;
+
+ for (uint32_t block_index = first_index; block_index < last_index; block_index++)
+ {
+ const basist::uastc_block& blk = pBlocks[block_index];
+ const color_rgba* pPixels = &pBlock_pixels[16 * block_index];
+
+ unpacked_uastc_block unpacked_blk;
+ if (!unpack_uastc(blk, unpacked_blk, false, true))
+ return false;
+
+ const uint32_t block_mode = unpacked_blk.m_mode;
+ if (block_mode == UASTC_MODE_INDEX_SOLID_COLOR)
+ continue;
+
+ color_rgba decoded_uastc_block[4][4];
+ if (!unpack_uastc(unpacked_blk, (basist::color32*)decoded_uastc_block, false))
+ return false;
+
+ uint64_t uastc_err = 0;
+ for (uint32_t i = 0; i < 16; i++)
+ uastc_err += color_distance(perceptual, pPixels[i], ((color_rgba*)decoded_uastc_block)[i], true);
+
+ // Transcode to BC7
+ bc7_optimization_results b7_results;
+ if (!transcode_uastc_to_bc7(unpacked_blk, b7_results))
+ return false;
+
+ basist::bc7_block b7_block;
+ basist::encode_bc7_block(&b7_block, &b7_results);
+
+ color_rgba decoded_b7_blk[4][4];
+ unpack_block(texture_format::cBC7, &b7_block, &decoded_b7_blk[0][0]);
+
+ uint64_t bc7_err = 0;
+ for (uint32_t i = 0; i < 16; i++)
+ bc7_err += color_distance(perceptual, pPixels[i], ((color_rgba*)decoded_b7_blk)[i], true);
+
+ uint64_t cur_err = (uastc_err + bc7_err) / 2;
+
+ // Divide by 16*4 to compute RMS error
+ float cur_rms_err = sqrt((float)cur_err * (1.0f / 64.0f));
+
+ const uint32_t first_sel_bit = g_uastc_mode_selector_bits[block_mode][0];
+ const uint32_t total_sel_bits = g_uastc_mode_selector_bits[block_mode][1];
+ assert(first_sel_bit + total_sel_bits <= 128);
+ assert(total_sel_bits > 0);
+
+ uint32_t cur_bit_offset = first_sel_bit;
+ uint64_t cur_sel_bits = read_bits((const uint8_t*)&blk, cur_bit_offset, std::min(64U, total_sel_bits));
+
+ if (cur_rms_err >= params.m_skip_block_rms_thresh)
+ {
+ auto cur_search_res = selector_history.insert(std::make_pair(selector_bitsequence(first_sel_bit, cur_sel_bits), block_index));
+
+ // Block already has too much error, so don't mess with it.
+ if (!cur_search_res.second)
+ (*cur_search_res.first).second = block_index;
+
+ total_skipped++;
+ continue;
+ }
+
+ int cur_bits;
+ auto cur_find_res = selector_history.find(selector_bitsequence(first_sel_bit, cur_sel_bits));
+ if (cur_find_res == selector_history.end())
+ {
+ // Wasn't found - wildly estimate literal cost
+ //cur_bits = (total_sel_bits * 5) / 4;
+ cur_bits = (total_sel_bits * params.m_lz_literal_cost) / 100;
+ }
+ else
+ {
+ // Was found - wildly estimate match cost
+ uint32_t match_block_index = cur_find_res->second;
+ const int block_dist_in_bytes = (block_index - match_block_index) * 16;
+ cur_bits = compute_match_cost_estimate(block_dist_in_bytes);
+ }
+
+ int first_block_to_check = std::max<int>(first_index, block_index - total_blocks_to_check);
+ int last_block_to_check = block_index - 1;
+
+ basist::uastc_block best_block(blk);
+ uint32_t best_block_index = block_index;
+
+ float best_t = (cur_bits + cur_err * params.m_langrangian_multiplier) * params.m_quality_scaler;
+
+ // Now scan through previous blocks, insert their selector bit patterns into the current block, and find
+ // selector bit patterns which don't increase the overall block error too much.
+ for (int prev_block_index = last_block_to_check; prev_block_index >= first_block_to_check; --prev_block_index)
+ {
+ const basist::uastc_block& prev_blk = pBlocks[prev_block_index];
+
+ uint32_t bit_offset = first_sel_bit;
+ uint64_t sel_bits = read_bits((const uint8_t*)&prev_blk, bit_offset, std::min(64U, total_sel_bits));
+
+ int match_block_index = prev_block_index;
+ auto res = selector_history.find(selector_bitsequence(first_sel_bit, sel_bits));
+ if (res != selector_history.end())
+ match_block_index = res->second;
+ // Have we already checked this bit pattern? If so then skip this block.
+ if (match_block_index > prev_block_index)
+ continue;
+
+ unpacked_uastc_block unpacked_prev_blk;
+ if (!unpack_uastc(prev_blk, unpacked_prev_blk, false, true))
+ return false;
+
+ basist::uastc_block trial_blk(blk);
+
+ set_block_bits((uint8_t*)&trial_blk, sel_bits, std::min(64U, total_sel_bits), first_sel_bit);
+
+ if (total_sel_bits > 64)
+ {
+ sel_bits = read_bits((const uint8_t*)&prev_blk, bit_offset, total_sel_bits - 64U);
+
+ set_block_bits((uint8_t*)&trial_blk, sel_bits, total_sel_bits - 64U, first_sel_bit + std::min(64U, total_sel_bits));
+ }
+
+ unpacked_uastc_block unpacked_trial_blk;
+ if (!unpack_uastc(trial_blk, unpacked_trial_blk, false, true))
+ continue;
+
+ color_rgba decoded_trial_uastc_block[4][4];
+ if (!unpack_uastc(unpacked_trial_blk, (basist::color32*)decoded_trial_uastc_block, false))
+ continue;
+
+ uint64_t trial_uastc_err = 0;
+ for (uint32_t i = 0; i < 16; i++)
+ trial_uastc_err += color_distance(perceptual, pPixels[i], ((color_rgba*)decoded_trial_uastc_block)[i], true);
+
+ // Transcode trial to BC7, compute error
+ bc7_optimization_results trial_b7_results;
+ if (!transcode_uastc_to_bc7(unpacked_trial_blk, trial_b7_results))
+ return false;
+
+ basist::bc7_block trial_b7_block;
+ basist::encode_bc7_block(&trial_b7_block, &trial_b7_results);
+
+ color_rgba decoded_trial_b7_blk[4][4];
+ unpack_block(texture_format::cBC7, &trial_b7_block, &decoded_trial_b7_blk[0][0]);
+
+ uint64_t trial_bc7_err = 0;
+ for (uint32_t i = 0; i < 16; i++)
+ trial_bc7_err += color_distance(perceptual, pPixels[i], ((color_rgba*)decoded_trial_b7_blk)[i], true);
+
+ uint64_t trial_err = (trial_uastc_err + trial_bc7_err) / 2;
+
+ float trial_rms_err = sqrtf((float)trial_err * (1.0f / 64.0f));
+
+ if (trial_rms_err > cur_rms_err* params.m_max_allowed_rms_increase_ratio)
+ continue;
+
+ const int block_dist_in_bytes = (block_index - match_block_index) * 16;
+ const int match_bits = compute_match_cost_estimate(block_dist_in_bytes);
+
+ float t = match_bits + trial_err * params.m_langrangian_multiplier;
+ if (t < best_t)
+ {
+ best_t = t;
+ best_block_index = prev_block_index;
+
+ best_block = trial_blk;
+ }
+
+ } // prev_block_index
+
+ if ((params.m_endpoint_refinement) && (best_block_index != block_index))
+ {
+ total_modified++;
+
+ unpacked_uastc_block unpacked_best_blk;
+ if (!unpack_uastc(best_block, unpacked_best_blk, false, false))
+ return false;
+
+ if (block_mode == 0)
+ {
+ // Attempt to refine mode 0 block's endpoints, using the new selectors. This doesn't help much, but it does help.
+ // TODO: We could do this with the other modes too.
+ color_rgba decoded_best_uastc_block[4][4];
+ if (!unpack_uastc(unpacked_best_blk, (basist::color32*)decoded_best_uastc_block, false))
+ return false;
+
+ // Compute the block's current error (with the modified selectors).
+ uint64_t best_uastc_err = 0;
+ for (uint32_t i = 0; i < 16; i++)
+ best_uastc_err += color_distance(perceptual, pPixels[i], ((color_rgba*)decoded_best_uastc_block)[i], true);
+
+ bc7enc_compress_block_params comp_params;
+ memset(&comp_params, 0, sizeof(comp_params));
+ comp_params.m_max_partitions_mode1 = 64;
+ comp_params.m_least_squares_passes = 1;
+ comp_params.m_weights[0] = 1;
+ comp_params.m_weights[1] = 1;
+ comp_params.m_weights[2] = 1;
+ comp_params.m_weights[3] = 1;
+ comp_params.m_uber_level = 0;
+
+ uastc_encode_results results;
+ uint32_t total_results = 0;
+ astc_mode0_or_18(0, (color_rgba(*)[4])pPixels, &results, total_results, comp_params, unpacked_best_blk.m_astc.m_weights);
+ assert(total_results == 1);
+
+ // See if the overall error has actually gone done.
+
+ color_rgba decoded_trial_uastc_block[4][4];
+ bool success = unpack_uastc(results.m_uastc_mode, results.m_common_pattern, results.m_solid_color.get_color32(), results.m_astc, (basist::color32*) & decoded_trial_uastc_block[0][0], false);
+ assert(success);
+
+ BASISU_NOTE_UNUSED(success);
+
+ uint64_t trial_uastc_err = 0;
+ for (uint32_t i = 0; i < 16; i++)
+ trial_uastc_err += color_distance(perceptual, pPixels[i], ((color_rgba*)decoded_trial_uastc_block)[i], true);
+
+ if (trial_uastc_err < best_uastc_err)
+ {
+ // The error went down, so accept the new endpoints.
+
+ // Ensure the selectors haven't changed, otherwise we'll invalidate the LZ matches.
+ for (uint32_t i = 0; i < 16; i++)
+ assert(unpacked_best_blk.m_astc.m_weights[i] == results.m_astc.m_weights[i]);
+
+ unpacked_best_blk.m_astc = results.m_astc;
+
+ total_refined++;
+ }
+ }
+
+ if (!uastc_recompute_hints(&best_block, pPixels, flags, &unpacked_best_blk))
+ return false;
+
+ pBlocks[block_index] = best_block;
+ }
+
+ {
+ uint32_t bit_offset = first_sel_bit;
+ uint64_t sel_bits = read_bits((const uint8_t*)&best_block, bit_offset, std::min(64U, total_sel_bits));
+
+ auto res = selector_history.insert(std::make_pair(selector_bitsequence(first_sel_bit, sel_bits), block_index));
+ if (!res.second)
+ (*res.first).second = block_index;
+ }
+
+ } // block_index
+
+ return true;
+ }
+
+ // This function implements a basic form of rate distortion optimization (RDO) for UASTC.
+ // It only changes selectors and then updates the hints. It uses very approximate LZ bitprice estimation.
+ // There's A LOT that can be done better in here, but it's a start.
+ // One nice advantage of the method used here is that it works for any input, no matter which or how many modes it uses.
+ bool uastc_rdo(uint32_t num_blocks, basist::uastc_block* pBlocks, const color_rgba* pBlock_pixels, const uastc_rdo_params& params, uint32_t flags, job_pool* pJob_pool, uint32_t total_jobs)
+ {
+ assert(params.m_max_allowed_rms_increase_ratio > 1.0f);
+ assert(params.m_lz_dict_size > 0);
+ assert(params.m_quality_scaler > 0.0f);
+
+ uint32_t total_skipped = 0, total_modified = 0, total_refined = 0;
+
+ uint32_t blocks_per_job = total_jobs ? (num_blocks / total_jobs) : 0;
+
+ std::mutex stat_mutex;
+
+ bool status = false;
+
+ if ((!pJob_pool) || (total_jobs <= 1) || (blocks_per_job <= 8))
+ {
+ status = uastc_rdo_blocks(0, num_blocks, pBlocks, pBlock_pixels, params, flags, total_skipped, total_refined, total_modified);
+ }
+ else
+ {
+ bool all_succeeded = true;
+
+ for (uint32_t block_index_iter = 0; block_index_iter < num_blocks; block_index_iter += blocks_per_job)
+ {
+ const uint32_t first_index = block_index_iter;
+ const uint32_t last_index = minimum<uint32_t>(num_blocks, block_index_iter + blocks_per_job);
+
+ pJob_pool->add_job([first_index, last_index, pBlocks, pBlock_pixels, ¶ms, flags, &total_skipped, &total_modified, &total_refined, &all_succeeded, &stat_mutex] {
+
+ uint32_t job_skipped = 0, job_modified = 0, job_refined = 0;
+
+ bool status = uastc_rdo_blocks(first_index, last_index, pBlocks, pBlock_pixels, params, flags, job_skipped, job_refined, job_modified);
+
+ {
+ std::lock_guard<std::mutex> lck(stat_mutex);
+
+ all_succeeded = all_succeeded && status;
+ total_skipped += job_skipped;
+ total_modified += job_modified;
+ total_refined += job_refined;
+ }
+
+ }
+ );
+ } // block_index_iter
+
+ pJob_pool->wait_for_all();
+
+ status = all_succeeded;
+ }
+
+ debug_printf("uastc_rdo: Total modified: %3.2f%%, total skipped: %3.2f%%, total refined: %3.2f%%\n", total_modified * 100.0f / num_blocks, total_skipped * 100.0f / num_blocks, total_refined * 100.0f / num_blocks);
+
+ return status;
+ }
+} // namespace basisu
+
+
+
+
+
diff --git a/basisu_uastc_enc.h b/basisu_uastc_enc.h
new file mode 100644
index 0000000..20a143b
--- /dev/null
+++ b/basisu_uastc_enc.h
@@ -0,0 +1,125 @@
+// basisu_uastc_enc.h
+// Copyright (C) 2019-2020 Binomial LLC. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#pragma once
+#include "basisu_etc.h"
+
+#include "transcoder/basisu_transcoder_uastc.h"
+
+namespace basisu
+{
+ const uint32_t TOTAL_PACK_UASTC_LEVELS = 5;
+
+ enum
+ {
+ // Fastest is the lowest quality, although it's stil substantially higher quality vs. BC1/ETC1. It supports 5 modes.
+ // The output may be somewhat blocky because this setting doesn't support 2/3-subset UASTC modes, but it should be less blocky vs. BC1/ETC1.
+ // This setting doesn't write BC1 hints, so BC1 transcoding will be slower.
+ // Transcoded ETC1 quality will be lower because it only considers 2 hints out of 32.
+ // Avg. 43.45 dB
+ cPackUASTCLevelFastest = 0,
+
+ // Faster is ~3x slower than fastest. It supports 9 modes.
+ // Avg. 46.49 dB
+ cPackUASTCLevelFaster = 1,
+
+ // Default is ~5.5x slower than fastest. It supports 14 modes.
+ // Avg. 47.47 dB
+ cPackUASTCLevelDefault = 2,
+
+ // Slower is ~14.5x slower than fastest. It supports all 18 modes.
+ // Avg. 48.01 dB
+ cPackUASTCLevelSlower = 3,
+
+ // VerySlow is ~200x slower than fastest.
+ // The best quality the codec is capable of, but you'll need to be patient or have a lot of cores.
+ // Avg. 48.24 dB
+ cPackUASTCLevelVerySlow = 4,
+
+ cPackUASTCLevelMask = 0xF,
+
+ // By default the encoder tries to strike a balance between UASTC and transcoded BC7 quality.
+ // These flags allow you to favor only optimizing for lowest UASTC error, or lowest BC7 error.
+ cPackUASTCFavorUASTCError = 8,
+ cPackUASTCFavorBC7Error = 16,
+
+ cPackUASTCETC1FasterHints = 64,
+ cPackUASTCETC1FastestHints = 128,
+ cPackUASTCETC1DisableFlipAndIndividual = 256,
+ };
+
+ // pRGBAPixels: Pointer to source 4x4 block of RGBA pixels (R first in memory).
+ // block: Reference to destination UASTC block.
+ // level: Controls compression speed vs. performance tradeoff.
+ void encode_uastc(const uint8_t* pRGBAPixels, basist::uastc_block& output_block, uint32_t flags = cPackUASTCLevelDefault);
+
+ struct uastc_encode_results
+ {
+ uint32_t m_uastc_mode;
+ uint32_t m_common_pattern;
+ basist::astc_block_desc m_astc;
+ color_rgba m_solid_color;
+ uint64_t m_astc_err;
+ };
+
+ void pack_uastc(basist::uastc_block& blk, const uastc_encode_results& result, const etc_block& etc1_blk, uint32_t etc1_bias, const eac_a8_block& etc_eac_a8_blk, bool bc1_hint0, bool bc1_hint1);
+ const float UASTC_RDO_DEFAULT_MAX_ALLOWED_RMS_INCREASE_RATIO = 10.0f;
+ const float UASTC_RDO_DEFAULT_SKIP_BLOCK_RMS_THRESH = 8.0f;
+
+ struct uastc_rdo_params
+ {
+ uastc_rdo_params()
+ {
+ clear();
+ }
+
+ void clear()
+ {
+ m_quality_scaler = 1.0f;
+ m_lz_dict_size = 32768;
+ m_langrangian_multiplier = 0.025f;
+ m_max_allowed_rms_increase_ratio = UASTC_RDO_DEFAULT_MAX_ALLOWED_RMS_INCREASE_RATIO;
+ m_skip_block_rms_thresh = UASTC_RDO_DEFAULT_SKIP_BLOCK_RMS_THRESH;
+ m_endpoint_refinement = true;
+ m_lz_literal_cost = 100;
+ }
+
+ // m_quality_scaler: This value controls the overall quality vs. size tradeoff. Smaller values=larger/higher quality, 0=no change, larger values=smaller/lower quality.
+ // Good range to try is .2-2.5.
+ float m_quality_scaler;
+
+ // m_lz_dict_size: Size of LZ dictionary to simulate in bytes. The larger this value, the slower the encoder but the higher the quality per LZ compressed bit.
+ uint32_t m_lz_dict_size;
+
+ // m_langrangian_multiplier: The post-processor tries to reduce rate+distortion*langrangian_mul (rate is approximate LZ bits and distortion is squared error).
+ // Larger values push the postprocessor towards optimizing more for lower distortion, and smaller values more for rate.
+ float m_langrangian_multiplier;
+
+ // m_max_allowed_rms_increase_ratio: How much the RMS error of a block is allowed to increase before a trial is rejected. 1.0=no increase allowed, 1.05=5% increase allowed, etc.
+ float m_max_allowed_rms_increase_ratio;
+
+ // m_skip_block_rms_thresh: Blocks with this much RMS error or more are completely skipped by the RDO encoder.
+ float m_skip_block_rms_thresh;
+
+ // m_endpoint_refinement: If true, the post-process will attempt to refine the endpoints of blocks with modified selectors.
+ bool m_endpoint_refinement;
+
+ uint32_t m_lz_literal_cost;
+ };
+
+ // num_blocks, pBlocks: Number of blocks and pointer to UASTC blocks to process.
+ // pBlock_pixels: Pointer to an array of 4x4 blocks containing the original texture pixels. This is NOT a raster image, but a pointer to individual 4x4 blocks.
+ // flags: Pass in the same flags used to encode the UASTC blocks. The flags are used to reencode the transcode hints in the same way.
+ bool uastc_rdo(uint32_t num_blocks, basist::uastc_block* pBlocks, const color_rgba* pBlock_pixels, const uastc_rdo_params ¶ms, uint32_t flags = cPackUASTCLevelDefault, job_pool* pJob_pool = nullptr, uint32_t total_jobs = 0);
+} // namespace basisu
\ No newline at end of file
