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53 lines
1.7 KiB
53 lines
1.7 KiB
/* |
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz> |
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This file is part of Magnum. |
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Magnum 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 version 3 |
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only, as published by the Free Software Foundation. |
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Magnum 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 version 3 for more details. |
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*/ |
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#include "Atlas.h" |
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#include "Math/Geometry/Rectangle.h" |
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namespace Magnum { namespace TextureTools { |
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std::vector<Rectanglei> atlas(const Vector2i& atlasSize, const std::vector<Vector2i>& sizes) { |
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if(sizes.empty()) return {}; |
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/* Size of largest texture */ |
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Vector2i maxSize; |
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for(const Vector2i& size: sizes) { |
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/** @todo max() for vector types */ |
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if(size.x() > maxSize.x()) maxSize.x() = size.x(); |
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if(size.y() > maxSize.y()) maxSize.y() = size.y(); |
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} |
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std::vector<Rectanglei> atlas; |
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/* Columns and rows */ |
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Vector2i gridSize = atlasSize/maxSize; |
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if(std::size_t(gridSize.product()) < sizes.size()) { |
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Error() << "TextureTools::Atlas::create(): requested atlas size" |
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<< atlasSize << "is too small to fit" << sizes.size() |
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<< maxSize << "textures. Generated atlas will be empty."; |
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return atlas; |
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} |
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/** @todo actual magic implementation, not this joke */ |
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atlas.reserve(sizes.size()); |
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for(std::size_t i = 0; i != sizes.size(); ++i) |
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atlas.push_back(Rectanglei::fromSize(Vector2i(i%gridSize.x(), i/gridSize.x())*maxSize, sizes[i])); |
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return atlas; |
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} |
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}}
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