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62 lines
2.4 KiB
62 lines
2.4 KiB
/* |
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
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Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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#include "Atlas.h" |
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#include "Magnum/Math/Functions.h" |
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#include "Magnum/Math/Range.h" |
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namespace Magnum { namespace TextureTools { |
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std::vector<Range2Di> atlas(const Vector2i& atlasSize, const std::vector<Vector2i>& sizes, const Vector2i& padding) { |
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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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maxSize = Math::max(maxSize, size); |
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std::vector<Range2Di> atlas; |
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/* Columns and rows */ |
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const Vector2i paddedSize = maxSize+2*padding; |
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const Vector2i gridSize = atlasSize/paddedSize; |
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if(std::size_t(gridSize.product()) < sizes.size()) { |
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Error() << "TextureTools::atlas(): requested atlas size" << atlasSize |
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<< "is too small to fit" << sizes.size() << paddedSize |
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<< "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(Range2Di::fromSize(Vector2i(i%gridSize.x(), i/gridSize.x())*paddedSize+padding, sizes[i])); |
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return atlas; |
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} |
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}}
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