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59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
/* Quicktex 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 <utility>
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#include "../bc4/BC4Block.h"
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namespace quicktex::s3tc {
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class alignas(8) BC5Block {
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public:
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static constexpr int Width = 4;
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static constexpr int Height = 4;
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using BlockPair = std::pair<BC4Block, BC4Block>;
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BC4Block chan0_block;
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BC4Block chan1_block;
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constexpr BC5Block() : chan0_block(BC4Block()), chan1_block(BC4Block()) {
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static_assert(sizeof(BC5Block) == 16);
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static_assert(sizeof(std::array<BC5Block, 10>) == 16 * 10);
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static_assert(alignof(BC5Block) >= 8);
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}
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BC5Block(const BC4Block &chan0, const BC4Block &chan1) {
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chan0_block = chan0;
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chan1_block = chan1;
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}
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BlockPair GetBlocks() const { return BlockPair(chan0_block, chan1_block); }
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void SetBlocks(const BlockPair &pair) {
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chan0_block = pair.first;
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chan1_block = pair.second;
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}
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bool operator==(const BC5Block &Rhs) const { return chan0_block == Rhs.chan0_block && chan1_block == Rhs.chan1_block; }
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bool operator!=(const BC5Block &Rhs) const { return !(Rhs == *this); }
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};
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} // namespace quicktex::s3tc
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