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19e707ce19
This simply moves the new ColorQuantizer class out of the SCUMM engine and into the Graphics namespace where I think it belongs. It reduces a potentially large number of colors into a reasonable palette of the desired size. The SCUMM engine uses this so that the Mac versions can present the thumbnail image (which is at least 16 bpp) stored in savegames.
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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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 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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*
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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 General Public License for more details.
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*
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* You should have received a copy of the GNU 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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*/
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#ifndef GRAPHICS_COLOR_QUANTIZER_H
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#define GRAPHICS_COLOR_QUANTIZER_H
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namespace Graphics {
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class Octree;
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class Palette;
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/**
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* @brief Class for selecting a good palette from a large number of colors.
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*
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* Colors are added one by one, after which a palette with at most maxColors
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* entries can be retrieved. The caller is responsible for freeing the palette
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* afterwards.
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*/
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class ColorQuantizer {
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private:
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Octree *_octree = nullptr;
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public:
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/**
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* @brief Construct a new ColorQuantizer object
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*
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* @param maxColors the maximum number of colors in the final palette
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*/
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ColorQuantizer(int maxColors);
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~ColorQuantizer();
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/**
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* @brief Add a single color to the quantizer
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*
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* @param r the R component of the color
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* @param g the G component of the color
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* @param b the B component of the color
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*/
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void addColor(byte r, byte g, byte b);
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/**
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* @brief Retrieve the resulting palette from the quantizer.
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*
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* @return A Palette object with at most maxColor entries.
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*/
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Palette *getPalette();
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};
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} // End of namespace Graphics
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#endif
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