mirror of
https://github.com/drewcassidy/quicktex.git
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70 lines
2.4 KiB
C++
70 lines
2.4 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 <array>
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#include <type_traits>
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#include "Vec.h"
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namespace quicktex {
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template <typename T, size_t M, size_t N> class Matrix : Vec<Vec<T, N>, M> {
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// N: width, M:height
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// when using as a buffer for batches, vectors are actually *columns*
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public:
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Vec<T, N> &row(size_t m) { return this->at(m); }
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const Vec<T, N> &row(size_t m) const { return this->at(m); }
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Vec<T, M> get_column(size_t n) {
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Vec<T, M> res;
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for (unsigned m = 0; m < M; m++) { res[m] = row(m)[n]; }
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return res;
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}
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void set_column(size_t n, const Vec<T, M> &col) {
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for (unsigned m = 0; m < M; m++) { row(m)[n] = col[m]; }
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}
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std::array<T *, M> get_column_ptrs(size_t index) const {
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std::array<T *, M> ptrs;
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for (unsigned m = 0; m < M; m++) { ptrs[m] = &(row(m)[index]); }
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return ptrs;
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}
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Matrix<T, N, M> transpose() {
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Matrix<T, N, M> res;
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for (unsigned m = 0; m < M; m++) { res.set_column(m, row(m)); }
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return res;
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}
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};
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/**
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* Extension of Matrix with some helper aliases for use as a vector of channels
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*/
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template <typename T, size_t M, size_t N> class ChannelSet : Matrix<T, M, N> {
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Vec<T, N> &channel(size_t m) { return this->row(m); }
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const Vec<T, N> &channel(size_t m) const { return this->row(m); }
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Vec<T, M> get_pixel(size_t n) { return this->get_column(n); }
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void set_pixel(size_t n, const Vec<T, M> &pixel) { this->set_column(n, pixel); }
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};
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} // namespace quicktex
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