mirror of https://github.com/mosra/magnum.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.7 KiB
54 lines
1.7 KiB
14 years ago
|
/*
|
||
|
|
Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz>
|
||
|
|
|
||
|
|
This file is part of Magnum.
|
||
|
|
|
||
|
|
Magnum is free software: you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU Lesser General Public License version 3
|
||
|
|
only, as published by the Free Software Foundation.
|
||
|
|
|
||
|
|
Magnum is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU Lesser General Public License version 3 for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "Atlas.h"
|
||
|
|
|
||
|
|
#include "Math/Geometry/Rectangle.h"
|
||
|
|
|
||
|
|
namespace Magnum { namespace TextureTools {
|
||
|
|
|
||
|
|
std::vector<Rectanglei> atlas(const Vector2i& atlasSize, const std::vector<Vector2i>& sizes) {
|
||
|
|
if(sizes.empty()) return {};
|
||
|
|
|
||
|
|
/* Size of largest texture */
|
||
|
|
Vector2i maxSize;
|
||
|
|
for(const Vector2i& size: sizes) {
|
||
|
|
/** @todo max() for vector types */
|
||
|
|
if(size.x() > maxSize.x()) maxSize.x() = size.x();
|
||
|
|
if(size.y() > maxSize.y()) maxSize.y() = size.y();
|
||
|
|
}
|
||
|
|
|
||
|
|
std::vector<Rectanglei> atlas;
|
||
|
|
|
||
|
|
/* Columns and rows */
|
||
|
|
Vector2i gridSize = atlasSize/maxSize;
|
||
|
|
if(std::size_t(gridSize.product()) < sizes.size()) {
|
||
|
|
Error() << "TextureTools::Atlas::create(): requested atlas size"
|
||
|
|
<< atlasSize << "is too small to fit" << sizes.size()
|
||
|
|
<< maxSize << "textures. Generated atlas will be empty.";
|
||
|
|
return atlas;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** @todo actual magic implementation, not this joke */
|
||
|
|
|
||
|
|
atlas.reserve(sizes.size());
|
||
|
|
for(std::size_t i = 0; i != sizes.size(); ++i)
|
||
|
|
atlas.push_back(Rectanglei::fromSize(Vector2i(i%gridSize.x(), i/gridSize.x())*maxSize, sizes[i]));
|
||
|
|
|
||
|
|
return atlas;
|
||
|
|
}
|
||
|
|
|
||
|
|
}}
|