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45 lines
1.5 KiB
C++
45 lines
1.5 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 2020 <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 "BC1Decoder.h"
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#include <array>
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#include "ColorBlock.h"
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void rgbcx::BC1Decoder::DecodeBlock(const Color4x4 *dest, const BC1Block *block) {
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const unsigned l = block->GetLowColor();
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const unsigned h = block->GetHighColor();
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const auto l_color = Color32::Unpack565(l);
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const auto h_color = Color32::Unpack565(h);
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std::array<Color32, 4> colors;
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colors[0] = l_color;
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colors[1] = h_color;
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bool three_color = (h >= l);
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if (three_color) {
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colors[2] = _interpolator.InterpolateHalfColor(l_color, h_color);
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colors[3] = Color32(0,0,0);
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} else {
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colors[2] = _interpolator.InterpolateColor()
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}
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}
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