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55 lines
2.1 KiB
C++
55 lines
2.1 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 <cstdint>
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#include <memory>
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#include <tuple>
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#include <type_traits>
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#include "../../Block.h"
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#include "../../Decoder.h"
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#include "../../Texture.h"
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#include "../bc4/BC4Decoder.h"
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#include "BC5Block.h"
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namespace quicktex::s3tc {
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class BC5Decoder : public BlockDecoder<BlockTexture<BC5Block>> {
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public:
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using ChannelPair = std::tuple<uint8_t, uint8_t>;
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using BC4DecoderPtr = std::shared_ptr<BC4Decoder>;
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using BC4DecoderPair = std::tuple<BC4DecoderPtr, BC4DecoderPtr>;
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BC5Decoder(uint8_t chan0 = 0, uint8_t chan1 = 1) : BC5Decoder(std::make_shared<BC4Decoder>(chan0), std::make_shared<BC4Decoder>(chan1)) {}
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BC5Decoder(BC4DecoderPtr chan0_decoder, BC4DecoderPtr chan1_decoder) : _chan0_decoder(chan0_decoder), _chan1_decoder(chan1_decoder) {}
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ColorBlock<4, 4> DecodeBlock(const BC5Block &block) const override;
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ChannelPair GetChannels() const { return ChannelPair(_chan0_decoder->GetChannel(), _chan1_decoder->GetChannel()); }
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BC4DecoderPair GetBC4Decoders() const { return BC4DecoderPair(_chan0_decoder, _chan1_decoder); }
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private:
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const BC4DecoderPtr _chan0_decoder;
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const BC4DecoderPtr _chan1_decoder;
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};
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} // namespace quicktex::s3tc
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