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Diffstat (limited to 'thirdparty/basis_universal/encoder/basisu_bc7enc.h')
| -rw-r--r-- | thirdparty/basis_universal/encoder/basisu_bc7enc.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/thirdparty/basis_universal/encoder/basisu_bc7enc.h b/thirdparty/basis_universal/encoder/basisu_bc7enc.h new file mode 100644 index 0000000000..23469912e2 --- /dev/null +++ b/thirdparty/basis_universal/encoder/basisu_bc7enc.h @@ -0,0 +1,131 @@ +// File: basisu_bc7enc.h +// Copyright (C) 2019-2021 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_enc.h" +#include "../transcoder/basisu_transcoder_uastc.h" + +namespace basisu +{ + +#define BC7ENC_MAX_PARTITIONS1 (64) +#define BC7ENC_MAX_UBER_LEVEL (4) + + typedef uint8_t bc7enc_bool; + +#define BC7ENC_TRUE (1) +#define BC7ENC_FALSE (0) + + typedef struct { float m_c[4]; } bc7enc_vec4F; + + extern const float g_bc7_weights1x[2 * 4]; + extern const float g_bc7_weights2x[4 * 4]; + extern const float g_bc7_weights3x[8 * 4]; + extern const float g_bc7_weights4x[16 * 4]; + extern const float g_astc_weights4x[16 * 4]; + extern const float g_astc_weights5x[32 * 4]; + extern const float g_astc_weights_3levelsx[3 * 4]; + + extern basist::astc_quant_bin g_astc_sorted_order_unquant[basist::BC7ENC_TOTAL_ASTC_RANGES][256]; // [sorted unquantized order] + + struct color_cell_compressor_params + { + uint32_t m_num_pixels; + const basist::color_quad_u8* m_pPixels; + + uint32_t m_num_selector_weights; + const uint32_t* m_pSelector_weights; + + const bc7enc_vec4F* m_pSelector_weightsx; + uint32_t m_comp_bits; + + const uint8_t *m_pForce_selectors; + + // Non-zero m_astc_endpoint_range enables ASTC mode. m_comp_bits and m_has_pbits are always false. We only support 2, 3, or 4 bit weight encodings. + uint32_t m_astc_endpoint_range; + + uint32_t m_weights[4]; + bc7enc_bool m_has_alpha; + bc7enc_bool m_has_pbits; + bc7enc_bool m_endpoints_share_pbit; + bc7enc_bool m_perceptual; + }; + + struct color_cell_compressor_results + { + uint64_t m_best_overall_err; + basist::color_quad_u8 m_low_endpoint; + basist::color_quad_u8 m_high_endpoint; + uint32_t m_pbits[2]; + uint8_t* m_pSelectors; + uint8_t* m_pSelectors_temp; + + // Encoded ASTC indices, if ASTC mode is enabled + basist::color_quad_u8 m_astc_low_endpoint; + basist::color_quad_u8 m_astc_high_endpoint; + }; + + struct bc7enc_compress_block_params + { + // m_max_partitions_mode1 may range from 0 (disables mode 1) to BC7ENC_MAX_PARTITIONS1. The higher this value, the slower the compressor, but the higher the quality. + uint32_t m_max_partitions_mode1; + + // Relative RGBA or YCbCrA weights. + uint32_t m_weights[4]; + + // m_uber_level may range from 0 to BC7ENC_MAX_UBER_LEVEL. The higher this value, the slower the compressor, but the higher the quality. + uint32_t m_uber_level; + + // If m_perceptual is true, colorspace error is computed in YCbCr space, otherwise RGB. + bc7enc_bool m_perceptual; + + uint32_t m_least_squares_passes; + }; + + uint64_t color_cell_compression(uint32_t mode, const color_cell_compressor_params* pParams, color_cell_compressor_results* pResults, const bc7enc_compress_block_params* pComp_params); + + uint64_t color_cell_compression_est_astc( + uint32_t num_weights, uint32_t num_comps, const uint32_t* pWeight_table, + uint32_t num_pixels, const basist::color_quad_u8* pPixels, + uint64_t best_err_so_far, const uint32_t weights[4]); + + inline void bc7enc_compress_block_params_init_linear_weights(bc7enc_compress_block_params* p) + { + p->m_perceptual = BC7ENC_FALSE; + p->m_weights[0] = 1; + p->m_weights[1] = 1; + p->m_weights[2] = 1; + p->m_weights[3] = 1; + } + + inline void bc7enc_compress_block_params_init_perceptual_weights(bc7enc_compress_block_params* p) + { + p->m_perceptual = BC7ENC_TRUE; + p->m_weights[0] = 128; + p->m_weights[1] = 64; + p->m_weights[2] = 16; + p->m_weights[3] = 32; + } + + inline void bc7enc_compress_block_params_init(bc7enc_compress_block_params* p) + { + p->m_max_partitions_mode1 = BC7ENC_MAX_PARTITIONS1; + p->m_least_squares_passes = 1; + p->m_uber_level = 0; + bc7enc_compress_block_params_init_perceptual_weights(p); + } + + // bc7enc_compress_block_init() MUST be called before calling bc7enc_compress_block() (or you'll get artifacts). + void bc7enc_compress_block_init(); + +} // namespace basisu |