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50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
/*
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* This file is part of RGBDS.
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*
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* Copyright (c) 2022, Eldred Habert and RGBDS contributors.
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*
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* SPDX-License-Identifier: MIT
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*/
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#ifndef RGBDS_GFX_PROTO_PALETTE_HPP
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#define RGBDS_GFX_PROTO_PALETTE_HPP
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#include <algorithm>
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#include <array>
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#include <stddef.h>
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#include <stdint.h>
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class ProtoPalette {
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public:
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static constexpr size_t capacity = 4;
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private:
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// Up to 4 colors, sorted, and where SIZE_MAX means the slot is empty
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// (OK because it's not a valid color index)
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// Sorting is done on the raw numerical values to lessen `compare`'s complexity
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std::array<uint16_t, capacity> _colorIndices{UINT16_MAX, UINT16_MAX, UINT16_MAX, UINT16_MAX};
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public:
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/*
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* Adds the specified color to the set, or **silently drops it** if the set is full.
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*
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* Returns whether the color was unique.
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*/
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bool add(uint16_t color);
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enum ComparisonResult {
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NEITHER,
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WE_BIGGER,
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THEY_BIGGER = -1,
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};
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ComparisonResult compare(ProtoPalette const &other) const;
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size_t size() const;
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bool empty() const;
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decltype(_colorIndices)::const_iterator begin() const;
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decltype(_colorIndices)::const_iterator end() const;
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};
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#endif // RGBDS_GFX_PROTO_PALETTE_HPP
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