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81 lines
2.7 KiB
C++
81 lines
2.7 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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#include "Color.h"
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#include <algorithm>
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#include <cassert>
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#include "util.h"
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// region Color implementation
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Color::Color() { SetRGBA(0, 0, 0, 0xFF); }
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Color::Color(uint8_t r, uint8_t g, uint8_t b, uint8_t a) { SetRGBA(r, g, b, a); }
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uint16_t Color::Pack565Unscaled(uint8_t r, uint8_t g, uint8_t b) {
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Assert5Bit(r);
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Assert6Bit(g);
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Assert5Bit(b);
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return static_cast<uint16_t>(b | (g << 5) | (r << 11));
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}
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uint16_t Color::Pack565(uint8_t r, uint8_t g, uint8_t b) { return Pack565Unscaled(scale8To5(r), scale8To6(g), scale8To5(b)); }
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Color Color::Unpack565(uint16_t Packed) {
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uint8_t r = static_cast<uint8_t>(scale5To8((Packed >> 11) & 0x1FU));
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uint8_t g = static_cast<uint8_t>(scale6To8((Packed >> 5) & 0x3FU));
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uint8_t b = static_cast<uint8_t>(scale5To8(Packed & 0x1FU));
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return Color(r, g, b);
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}
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Color Color::Unpack565Unscaled(uint16_t Packed) {
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uint8_t r = (Packed >> 11) & 0x1F;
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uint8_t g = (Packed >> 5) & 0x3F;
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uint8_t b = Packed & 0x1F;
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return Color(r, g, b);
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}
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void Color::SetRGBA(uint8_t vr, uint8_t vg, uint8_t vb, uint8_t va = 0xFF) {
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r = vr;
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g = vg;
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b = vb;
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a = va;
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}
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void Color::SetRGB(uint8_t vr, uint8_t vg, uint8_t vb) {
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r = vr;
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g = vg;
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b = vb;
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}
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Color Color::min(const Color &a, const Color &b) { return Color(std::min(a[0], b[0]), std::min(a[1], b[1]), std::min(a[2], b[2]), std::min(a[3], b[3])); }
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Color Color::max(const Color &a, const Color &b) { return Color(std::max(a[0], b[0]), std::max(a[1], b[1]), std::max(a[2], b[2]), std::max(a[3], b[3])); }
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uint16_t Color::pack565() { return Pack565(r, g, b); }
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uint16_t Color::pack565Unscaled() { return Pack565Unscaled(r, g, b); }
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Color Color::ScaleTo565() const { return Color(scale8To5(r), scale8To6(g), scale8To5(b)); }
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Color Color::ScaleFrom565() const { return Color(scale5To8(r), scale6To8(g), scale5To8(b)); }
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// endregion
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