Method init_global_codebooks

engine/dlib/src/basis/encoder/basisu_frontend.cpp:318–569

	}

	bool basisu_frontend::init_global_codebooks()
	{
		const basist::basisu_lowlevel_etc1s_transcoder* pTranscoder = m_params.m_pGlobal_codebooks;

		const basist::basisu_lowlevel_etc1s_transcoder::endpoint_vec& endpoints = pTranscoder->get_endpoints();
		const basist::basisu_lowlevel_etc1s_transcoder::selector_vec& selectors = pTranscoder->get_selectors();
				
		m_endpoint_cluster_etc_params.resize(endpoints.size());
		for (uint32_t i = 0; i < endpoints.size(); i++)
		{
			m_endpoint_cluster_etc_params[i].m_inten_table[0] = endpoints[i].m_inten5;
			m_endpoint_cluster_etc_params[i].m_inten_table[1] = endpoints[i].m_inten5;

			m_endpoint_cluster_etc_params[i].m_color_unscaled[0].set(endpoints[i].m_color5.r, endpoints[i].m_color5.g, endpoints[i].m_color5.b, 255);
			m_endpoint_cluster_etc_params[i].m_color_used[0] = true;
			m_endpoint_cluster_etc_params[i].m_valid = true;
		}

		m_optimized_cluster_selectors.resize(selectors.size());
		for (uint32_t i = 0; i < m_optimized_cluster_selectors.size(); i++)
		{
			for (uint32_t y = 0; y < 4; y++)
				for (uint32_t x = 0; x < 4; x++)
					m_optimized_cluster_selectors[i].set_selector(x, y, selectors[i].get_selector(x, y));
		}

		m_block_endpoint_clusters_indices.resize(m_total_blocks);

		m_orig_encoded_blocks.resize(m_total_blocks);

		m_block_selector_cluster_index.resize(m_total_blocks);

#if 0
		for (uint32_t block_index_iter = 0; block_index_iter < m_total_blocks; block_index_iter += N)
		{
			const uint32_t first_index = block_index_iter;
			const uint32_t last_index = minimum<uint32_t>(m_total_blocks, first_index + N);

#ifndef __EMSCRIPTEN__
			m_params.m_pJob_pool->add_job([this, first_index, last_index] {
#endif

				for (uint32_t block_index = first_index; block_index < last_index; block_index++)
				{
					const etc_block& blk = m_etc1_blocks_etc1s[block_index];

					const uint32_t block_endpoint_index = m_block_endpoint_clusters_indices[block_index][0];

					etc_block trial_blk;
					trial_blk.set_block_color5_etc1s(blk.m_color_unscaled[0]);
					trial_blk.set_flip_bit(true);

					uint64_t best_err = UINT64_MAX;
					uint32_t best_index = 0;

					for (uint32_t i = 0; i < m_optimized_cluster_selectors.size(); i++)
					{
						trial_blk.set_raw_selector_bits(m_optimized_cluster_selectors[i].get_raw_selector_bits());