Function astc_init

encoder/basisu_bc7enc.cpp:97–175

static uint8_t g_astc_nearest_sorted_index[BC7ENC_TOTAL_ASTC_RANGES][256];

static void astc_init()
{
	for (uint32_t range = 0; range < BC7ENC_TOTAL_ASTC_RANGES; range++)
	{
		if (!astc_is_valid_endpoint_range(range))
			continue;

		const uint32_t levels = astc_get_levels(range);

		uint32_t vals[256];
		// TODO
		for (uint32_t i = 0; i < levels; i++)
			vals[i] = (unquant_astc_endpoint_val(i, range) << 8) | i;

		std::sort(vals, vals + levels);

		for (uint32_t i = 0; i < levels; i++)
		{
			uint32_t order = vals[i] & 0xFF;
			uint32_t unq = vals[i] >> 8;

			g_astc_sorted_order_unquant[range][i].m_unquant = (uint8_t)unq;
			g_astc_sorted_order_unquant[range][i].m_index = (uint8_t)order;

		} // i

#if 0
		if (g_astc_bise_range_table[range][1] || g_astc_bise_range_table[range][2])
		{
			printf("// Range: %u, Levels: %u, Bits: %u, Trits: %u, Quints: %u\n", range, levels, g_astc_bise_range_table[range][0], g_astc_bise_range_table[range][1], g_astc_bise_range_table[range][2]);

			printf("{");
			for (uint32_t i = 0; i < levels; i++)
			{
				printf("{%u,%u}", g_astc_sorted_order_unquant[range][i].m_index, g_astc_sorted_order_unquant[range][i].m_unquant);
				if (i != (levels - 1))
					printf(",");
			}
			printf("}\n");
		}
#endif

#if 0
		if (g_astc_bise_range_table[range][1] || g_astc_bise_range_table[range][2])
		{
			printf("// Range: %u, Levels: %u, Bits: %u, Trits: %u, Quints: %u\n", range, levels, g_astc_bise_range_table[range][0], g_astc_bise_range_table[range][1], g_astc_bise_range_table[range][2]);

			printf("{");
			for (uint32_t i = 0; i < levels; i++)
			{
				printf("{%u,%u}", g_astc_unquant[range][i].m_index, g_astc_unquant[range][i].m_unquant);
				if (i != (levels - 1))
					printf(",");
			}
			printf("}\n");
		}
#endif