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56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
/* Python-rgbcx Texture Compression Library
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Copyright (C) 2021 Andrew Cassidy <drewcassidy@me.com>
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Partially derived from rgbcx.h written by Richard Geldreich <richgel99@gmail.com>
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and licenced under the public domain
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <cassert>
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include "../BC4/BC4Decoder.h"
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#include "../BlockDecoder.h"
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#include "../BlockView.h"
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#include "../ndebug.h"
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#include "BC5Block.h"
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namespace rgbcx {
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class BC5Decoder : public BlockDecoder<BC5Block, 4, 4> {
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public:
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using BC4DecoderPtr = std::shared_ptr<BC4Decoder>;
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BC5Decoder(uint8_t chan0 = 0, uint8_t chan1 = 1) : BC5Decoder(std::make_shared<BC4Decoder>(), chan0, chan1) {}
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BC5Decoder(BC4DecoderPtr bc4_decoder, uint8_t chan0 = 0, uint8_t chan1 = 1) : _bc4_decoder(bc4_decoder), _chan0(chan0), _chan1(chan1) {
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assert(chan0 < 4U);
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assert(chan1 < 4U);
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assert(chan0 != chan1);
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}
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void DecodeBlock(Color4x4 dest, BC5Block *const block) const noexcept(ndebug) override;
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constexpr size_t GetChannel0() const { return _chan0; }
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constexpr size_t GetChannel1() const { return _chan1; }
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private:
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const BC4DecoderPtr _bc4_decoder;
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const uint8_t _chan0;
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const uint8_t _chan1;
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};
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} // namespace rgbcx
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