| // basisu_transcoder_uastc.h |
| #pragma once |
| #include "basisu_transcoder_internal.h" |
| |
| namespace basist |
| { |
| struct color_quad_u8 |
| { |
| uint8_t m_c[4]; |
| }; |
| |
| const uint32_t TOTAL_UASTC_MODES = 19; |
| const uint32_t UASTC_MODE_INDEX_SOLID_COLOR = 8; |
| |
| const uint32_t TOTAL_ASTC_BC7_COMMON_PARTITIONS2 = 30; |
| const uint32_t TOTAL_ASTC_BC7_COMMON_PARTITIONS3 = 11; |
| const uint32_t TOTAL_BC7_3_ASTC2_COMMON_PARTITIONS = 19; |
| |
| extern const uint8_t g_uastc_mode_weight_bits[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_weight_ranges[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_endpoint_ranges[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_subsets[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_planes[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_comps[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_has_etc1_bias[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_has_bc1_hint0[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_has_bc1_hint1[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_has_alpha[TOTAL_UASTC_MODES]; |
| extern const uint8_t g_uastc_mode_is_la[TOTAL_UASTC_MODES]; |
| |
| struct astc_bc7_common_partition2_desc |
| { |
| uint8_t m_bc7; |
| uint16_t m_astc; |
| bool m_invert; |
| }; |
| |
| extern const astc_bc7_common_partition2_desc g_astc_bc7_common_partitions2[TOTAL_ASTC_BC7_COMMON_PARTITIONS2]; |
| |
| struct bc73_astc2_common_partition_desc |
| { |
| uint8_t m_bc73; |
| uint16_t m_astc2; |
| uint8_t k; // 0-5 - how to modify the BC7 3-subset pattern to match the ASTC pattern (LSB=invert) |
| }; |
| |
| extern const bc73_astc2_common_partition_desc g_bc7_3_astc2_common_partitions[TOTAL_BC7_3_ASTC2_COMMON_PARTITIONS]; |
| |
| struct astc_bc7_common_partition3_desc |
| { |
| uint8_t m_bc7; |
| uint16_t m_astc; |
| uint8_t m_astc_to_bc7_perm; // converts ASTC to BC7 partition using g_astc_bc7_partition_index_perm_tables[][] |
| }; |
| |
| extern const astc_bc7_common_partition3_desc g_astc_bc7_common_partitions3[TOTAL_ASTC_BC7_COMMON_PARTITIONS3]; |
| |
| extern const uint8_t g_astc_bc7_patterns2[TOTAL_ASTC_BC7_COMMON_PARTITIONS2][16]; |
| extern const uint8_t g_astc_bc7_patterns3[TOTAL_ASTC_BC7_COMMON_PARTITIONS3][16]; |
| extern const uint8_t g_bc7_3_astc2_patterns2[TOTAL_BC7_3_ASTC2_COMMON_PARTITIONS][16]; |
| |
| extern const uint8_t g_astc_bc7_pattern2_anchors[TOTAL_ASTC_BC7_COMMON_PARTITIONS2][3]; |
| extern const uint8_t g_astc_bc7_pattern3_anchors[TOTAL_ASTC_BC7_COMMON_PARTITIONS3][3]; |
| extern const uint8_t g_bc7_3_astc2_patterns2_anchors[TOTAL_BC7_3_ASTC2_COMMON_PARTITIONS][3]; |
| |
| extern const uint32_t g_uastc_mode_huff_codes[TOTAL_UASTC_MODES + 1][2]; |
| |
| extern const uint8_t g_astc_to_bc7_partition_index_perm_tables[6][3]; |
| extern const uint8_t g_bc7_to_astc_partition_index_perm_tables[6][3]; // inverse of g_astc_to_bc7_partition_index_perm_tables |
| |
| extern const uint8_t* s_uastc_to_bc1_weights[6]; |
| |
| uint32_t bc7_convert_partition_index_3_to_2(uint32_t p, uint32_t k); |
| |
| inline uint32_t astc_interpolate(uint32_t l, uint32_t h, uint32_t w, bool srgb) |
| { |
| if (srgb) |
| { |
| l = (l << 8) | 0x80; |
| h = (h << 8) | 0x80; |
| } |
| else |
| { |
| l = (l << 8) | l; |
| h = (h << 8) | h; |
| } |
| |
| uint32_t k = (l * (64 - w) + h * w + 32) >> 6; |
| |
| return k >> 8; |
| } |
| |
| struct astc_block_desc |
| { |
| int m_weight_range; // weight BISE range |
| |
| int m_subsets; // number of ASTC partitions |
| int m_partition_seed; // partition pattern seed |
| int m_cem; // color endpoint mode used by all subsets |
| |
| int m_ccs; // color component selector (dual plane only) |
| bool m_dual_plane; // true if dual plane |
| |
| // Weight and endpoint BISE values. |
| // Note these values are NOT linear, they must be BISE encoded. See Table 97 and Table 107. |
| uint8_t m_endpoints[18]; // endpoint values, in RR GG BB etc. order |
| uint8_t m_weights[64]; // weight index values, raster order, in P0 P1, P0 P1, etc. or P0, P0, P0, P0, etc. order |
| }; |
| |
| const uint32_t BC7ENC_TOTAL_ASTC_RANGES = 21; |
| |
| // See tables 81, 93, 18.13.Endpoint Unquantization |
| const uint32_t TOTAL_ASTC_RANGES = 21; |
| extern const int g_astc_bise_range_table[TOTAL_ASTC_RANGES][3]; |
| |
| struct astc_quant_bin |
| { |
| uint8_t m_unquant; // unquantized value |
| uint8_t m_index; // sorted index |
| }; |
| |
| extern astc_quant_bin g_astc_unquant[BC7ENC_TOTAL_ASTC_RANGES][256]; // [ASTC encoded endpoint index] |
| |
| int astc_get_levels(int range); |
| bool astc_is_valid_endpoint_range(uint32_t range); |
| uint32_t unquant_astc_endpoint(uint32_t packed_bits, uint32_t packed_trits, uint32_t packed_quints, uint32_t range); |
| uint32_t unquant_astc_endpoint_val(uint32_t packed_val, uint32_t range); |
| |
| const uint8_t* get_anchor_indices(uint32_t subsets, uint32_t mode, uint32_t common_pattern, const uint8_t*& pPartition_pattern); |
| |
| // BC7 |
| const uint32_t BC7ENC_BLOCK_SIZE = 16; |
| |
| struct bc7_block |
| { |
| uint64_t m_qwords[2]; |
| }; |
| |
| struct bc7_optimization_results |
| { |
| uint32_t m_mode; |
| uint32_t m_partition; |
| uint8_t m_selectors[16]; |
| uint8_t m_alpha_selectors[16]; |
| color_quad_u8 m_low[3]; |
| color_quad_u8 m_high[3]; |
| uint32_t m_pbits[3][2]; |
| uint32_t m_index_selector; |
| uint32_t m_rotation; |
| }; |
| |
| extern const uint32_t g_bc7_weights1[2]; |
| extern const uint32_t g_bc7_weights2[4]; |
| extern const uint32_t g_bc7_weights3[8]; |
| extern const uint32_t g_bc7_weights4[16]; |
| extern const uint32_t g_astc_weights4[16]; |
| extern const uint32_t g_astc_weights5[32]; |
| extern const uint32_t g_astc_weights_3levels[3]; |
| extern const uint8_t g_bc7_partition1[16]; |
| extern const uint8_t g_bc7_partition2[64 * 16]; |
| extern const uint8_t g_bc7_partition3[64 * 16]; |
| extern const uint8_t g_bc7_table_anchor_index_second_subset[64]; |
| extern const uint8_t g_bc7_table_anchor_index_third_subset_1[64]; |
| extern const uint8_t g_bc7_table_anchor_index_third_subset_2[64]; |
| extern const uint8_t g_bc7_num_subsets[8]; |
| extern const uint8_t g_bc7_partition_bits[8]; |
| extern const uint8_t g_bc7_color_index_bitcount[8]; |
| extern const uint8_t g_bc7_mode_has_p_bits[8]; |
| extern const uint8_t g_bc7_mode_has_shared_p_bits[8]; |
| extern const uint8_t g_bc7_color_precision_table[8]; |
| extern const int8_t g_bc7_alpha_precision_table[8]; |
| extern const uint8_t g_bc7_alpha_index_bitcount[8]; |
| |
| inline bool get_bc7_mode_has_seperate_alpha_selectors(int mode) { return (mode == 4) || (mode == 5); } |
| inline int get_bc7_color_index_size(int mode, int index_selection_bit) { return g_bc7_color_index_bitcount[mode] + index_selection_bit; } |
| inline int get_bc7_alpha_index_size(int mode, int index_selection_bit) { return g_bc7_alpha_index_bitcount[mode] - index_selection_bit; } |
| |
| struct endpoint_err |
| { |
| uint16_t m_error; uint8_t m_lo; uint8_t m_hi; |
| }; |
| |
| extern endpoint_err g_bc7_mode_6_optimal_endpoints[256][2]; // [c][pbit] |
| const uint32_t BC7ENC_MODE_6_OPTIMAL_INDEX = 5; |
| |
| extern endpoint_err g_bc7_mode_5_optimal_endpoints[256]; // [c] |
| const uint32_t BC7ENC_MODE_5_OPTIMAL_INDEX = 1; |
| |
| // Packs a BC7 block from a high-level description. Handles all BC7 modes. |
| void encode_bc7_block(void* pBlock, const bc7_optimization_results* pResults); |
| |
| // Packs an ASTC block |
| // Constraints: Always 4x4, all subset CEM's must be equal, only tested with LDR CEM's. |
| bool pack_astc_block(uint32_t* pDst, const astc_block_desc* pBlock, uint32_t mode); |
| |
| void pack_astc_solid_block(void* pDst_block, const color32& color); |
| |
| #ifdef _DEBUG |
| int astc_compute_texel_partition(int seed, int x, int y, int z, int partitioncount, bool small_block); |
| #endif |
| |
| struct uastc_block |
| { |
| union |
| { |
| uint8_t m_bytes[16]; |
| uint32_t m_dwords[4]; |
| }; |
| }; |
| |
| struct unpacked_uastc_block |
| { |
| astc_block_desc m_astc; |
| |
| uint32_t m_mode; |
| uint32_t m_common_pattern; |
| |
| color32 m_solid_color; |
| |
| bool m_bc1_hint0; |
| bool m_bc1_hint1; |
| |
| bool m_etc1_flip; |
| bool m_etc1_diff; |
| uint32_t m_etc1_inten0; |
| uint32_t m_etc1_inten1; |
| |
| uint32_t m_etc1_bias; |
| |
| uint32_t m_etc2_hints; |
| |
| uint32_t m_etc1_selector; |
| uint32_t m_etc1_r, m_etc1_g, m_etc1_b; |
| }; |
| |
| color32 apply_etc1_bias(const color32 &block_color, uint32_t bias, uint32_t limit, uint32_t subblock); |
| |
| struct decoder_etc_block; |
| struct eac_block; |
| |
| bool unpack_uastc(uint32_t mode, uint32_t common_pattern, const color32& solid_color, const astc_block_desc& astc, color32* pPixels, bool srgb); |
| bool unpack_uastc(const unpacked_uastc_block& unpacked_blk, color32* pPixels, bool srgb); |
| |
| bool unpack_uastc(const uastc_block& blk, color32* pPixels, bool srgb); |
| bool unpack_uastc(const uastc_block& blk, unpacked_uastc_block& unpacked, bool undo_blue_contract, bool read_hints = true); |
| |
| bool transcode_uastc_to_astc(const uastc_block& src_blk, void* pDst); |
| |
| bool transcode_uastc_to_bc7(const unpacked_uastc_block& unpacked_src_blk, bc7_optimization_results& dst_blk); |
| bool transcode_uastc_to_bc7(const uastc_block& src_blk, bc7_optimization_results& dst_blk); |
| bool transcode_uastc_to_bc7(const uastc_block& src_blk, void* pDst); |
| |
| void transcode_uastc_to_etc1(unpacked_uastc_block& unpacked_src_blk, color32 block_pixels[4][4], void* pDst); |
| bool transcode_uastc_to_etc1(const uastc_block& src_blk, void* pDst); |
| bool transcode_uastc_to_etc1(const uastc_block& src_blk, void* pDst, uint32_t channel); |
| |
| void transcode_uastc_to_etc2_eac_a8(unpacked_uastc_block& unpacked_src_blk, color32 block_pixels[4][4], void* pDst); |
| bool transcode_uastc_to_etc2_rgba(const uastc_block& src_blk, void* pDst); |
| |
| // Packs 16 scalar values to BC4. Same PSNR as stb_dxt's BC4 encoder, around 13% faster. |
| void encode_bc4(void* pDst, const uint8_t* pPixels, uint32_t stride); |
| |
| void encode_bc1_solid_block(void* pDst, uint32_t fr, uint32_t fg, uint32_t fb); |
| |
| enum |
| { |
| cEncodeBC1HighQuality = 1, |
| cEncodeBC1HigherQuality = 2, |
| cEncodeBC1UseSelectors = 4, |
| }; |
| void encode_bc1(void* pDst, const uint8_t* pPixels, uint32_t flags); |
| |
| // Alternate PCA-free encoder, around 15% faster, same (or slightly higher) avg. PSNR |
| void encode_bc1_alt(void* pDst, const uint8_t* pPixels, uint32_t flags); |
| |
| void transcode_uastc_to_bc1_hint0(const unpacked_uastc_block& unpacked_src_blk, void* pDst); |
| void transcode_uastc_to_bc1_hint1(const unpacked_uastc_block& unpacked_src_blk, const color32 block_pixels[4][4], void* pDst, bool high_quality); |
| |
| bool transcode_uastc_to_bc1(const uastc_block& src_blk, void* pDst, bool high_quality); |
| bool transcode_uastc_to_bc3(const uastc_block& src_blk, void* pDst, bool high_quality); |
| bool transcode_uastc_to_bc4(const uastc_block& src_blk, void* pDst, bool high_quality, uint32_t chan0); |
| bool transcode_uastc_to_bc5(const uastc_block& src_blk, void* pDst, bool high_quality, uint32_t chan0, uint32_t chan1); |
| |
| bool transcode_uastc_to_etc2_eac_r11(const uastc_block& src_blk, void* pDst, bool high_quality, uint32_t chan0); |
| bool transcode_uastc_to_etc2_eac_rg11(const uastc_block& src_blk, void* pDst, bool high_quality, uint32_t chan0, uint32_t chan1); |
| |
| bool transcode_uastc_to_pvrtc1_4_rgb(const uastc_block* pSrc_blocks, void* pDst_blocks, uint32_t num_blocks_x, uint32_t num_blocks_y, bool high_quality, bool from_alpha); |
| bool transcode_uastc_to_pvrtc1_4_rgba(const uastc_block* pSrc_blocks, void* pDst_blocks, uint32_t num_blocks_x, uint32_t num_blocks_y, bool high_quality); |
| |
| // uastc_init() MUST be called before using this module. |
| void uastc_init(); |
| |
| } // namespace basist |