67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
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// File: crn_dxt5a.h
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// See Copyright Notice and license at the end of inc/crnlib.h
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#pragma once
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#include "crn_dxt.h"
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namespace crnlib
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{
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class dxt5_endpoint_optimizer
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{
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public:
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dxt5_endpoint_optimizer();
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struct params
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{
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params() :
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m_block_index(0),
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m_pPixels(NULL),
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m_num_pixels(0),
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m_comp_index(3),
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m_quality(cCRNDXTQualityUber),
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m_use_both_block_types(true)
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{
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}
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uint m_block_index;
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const color_quad_u8* m_pPixels;
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uint m_num_pixels;
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uint m_comp_index;
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crn_dxt_quality m_quality;
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bool m_use_both_block_types;
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};
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struct results
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{
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uint8* m_pSelectors;
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uint64 m_error;
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uint8 m_first_endpoint;
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uint8 m_second_endpoint;
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uint8 m_block_type; // 1 if 6-alpha, otherwise 8-alpha
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};
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bool compute(const params& p, results& r);
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private:
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const params* m_pParams;
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results* m_pResults;
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crnlib::vector<uint8> m_unique_values;
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crnlib::vector<uint> m_unique_value_weights;
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crnlib::vector<uint8> m_trial_selectors;
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crnlib::vector<uint8> m_best_selectors;
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int m_unique_value_map[256];
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sparse_bit_array m_flags;
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void evaluate_solution(uint low_endpoint, uint high_endpoint);
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};
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} // namespace crnlib
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