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50 lines
1.8 KiB
C++
50 lines
1.8 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 <cstdint>
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#include "../BlockEncoder.h"
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#include "../BlockView.h"
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#include "../ndebug.h"
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#include "BC4Block.h"
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namespace rgbcx {
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class BC4Encoder : public BlockEncoderTemplate<BC4Block, 4, 4> {
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public:
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BC4Encoder(const uint8_t channel) { SetChannel(channel); }
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void EncodeBlock(Color4x4 pixels, BC4Block *const dest) const override { EncodeBlock(pixels.GetChannel(_channel), dest); }
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void EncodeBlock(Color4x4 pixels, BC4Block *const dest, uint8_t channel) const noexcept(ndebug) { EncodeBlock(pixels.GetChannel(channel), dest); }
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void EncodeBlock(Byte4x4 pixels, BC4Block *const dest) const noexcept(ndebug);
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uint8_t GetChannel() const { return _channel; }
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void SetChannel(uint8_t channel) {
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if (channel >= 4) throw std::invalid_argument("Channel out of range");
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_channel = channel;
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}
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private:
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uint8_t _channel;
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};
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} // namespace rgbcx
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