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112 lines
4.8 KiB
112 lines
4.8 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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2020, 2021, 2022, 2023 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 "AbstractGlyphCache.h" |
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#include <Corrade/Containers/StridedArrayView.h> |
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#include <Corrade/Containers/ArrayViewStl.h> /** @todo remove once std::vector is gone */ |
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#include "Magnum/Image.h" |
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#include "Magnum/ImageView.h" |
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#include "Magnum/PixelFormat.h" |
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#include "Magnum/TextureTools/Atlas.h" |
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namespace Magnum { namespace Text { |
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AbstractGlyphCache::AbstractGlyphCache(const Vector2i& size, const Vector2i& padding): _size{size}, _padding{padding} { |
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/* Default "Not Found" glyph. Can't do just `.insert({0, {}})` because |
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that's ambiguous in C++17, due to a new insert(node_type&&) overload. */ |
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glyphs.insert({0, std::pair<Vector2i, Range2Di>{}}); |
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} |
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AbstractGlyphCache::~AbstractGlyphCache() = default; |
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std::vector<Range2Di> AbstractGlyphCache::reserve(const std::vector<Vector2i>& sizes) { |
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CORRADE_ASSERT((glyphs.size() == 1 && glyphs.at(0) == std::pair<Vector2i, Range2Di>()), |
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"Text::AbstractGlyphCache::reserve(): reserving space in non-empty cache is not yet implemented", {}); |
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glyphs.reserve(glyphs.size() + sizes.size()); |
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/* Rotations are not yet supported */ |
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TextureTools::AtlasLandfill atlas{_size}; |
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atlas.setPadding(_padding) |
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.clearFlags(TextureTools::AtlasLandfillFlag::RotatePortrait| |
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TextureTools::AtlasLandfillFlag::RotateLandscape); |
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/* Create the output array. Because the new atlas packer doesn't accept |
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zero sizes, change those to be (1, 1) instead. A new interface will |
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disallow them as well, but here we want to keep backwards |
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compatibility. */ |
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std::vector<Range2Di> out(sizes.size()); |
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for(std::size_t i = 0; i != sizes.size(); ++i) |
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out[i].max() = Math::max(sizes[i], Vector2i{1}); |
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/* The error message matches what the old TextureTools::atlas() did. Not |
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great, but that's the interface we should stay compatible with. */ |
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if(!atlas.add(Containers::stridedArrayView(out).slice(&Range2Di::max), |
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Containers::stridedArrayView(out).slice(&Range2Di::min))) |
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{ |
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Error{} << "Text::AbstractGlyphCache::reserve(): requested atlas size" |
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<< _size << "is too small to fit" << sizes.size() |
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<< "textures. Generated atlas will be empty."; |
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return {}; |
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} |
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/* Update the ranges max values to match the new offsets, undo the zero |
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sizes being (1, 1) */ |
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for(std::size_t i = 0; i != sizes.size(); ++i) |
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out[i].max() = out[i].min() + sizes[i]; |
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return out; |
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} |
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void AbstractGlyphCache::insert(const UnsignedInt glyph, const Vector2i& position, const Range2Di& rectangle) { |
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const std::pair<Vector2i, Range2Di> glyphData = {position-_padding, rectangle.padded(_padding)}; |
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/* Overwriting "Not Found" glyph */ |
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if(glyph == 0) glyphs[0] = glyphData; |
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/* Inserting new glyph */ |
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else CORRADE_INTERNAL_ASSERT_OUTPUT(glyphs.insert({glyph, glyphData}).second); |
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} |
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void AbstractGlyphCache::setImage(const Vector2i& offset, const ImageView2D& image) { |
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CORRADE_ASSERT((offset >= Vector2i{} && offset + image.size() <= _size).all(), |
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"Text::AbstractGlyphCache::setImage():" << Range2Di::fromSize(offset, image.size()) << "out of range for texture size" << _size, ); |
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doSetImage(offset, image); |
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} |
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Image2D AbstractGlyphCache::image() { |
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CORRADE_ASSERT(features() & GlyphCacheFeature::ImageDownload, |
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"Text::AbstractGlyphCache::image(): feature not supported", Image2D{PixelFormat::R8Unorm}); |
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return doImage(); |
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} |
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Image2D AbstractGlyphCache::doImage() { |
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CORRADE_ASSERT_UNREACHABLE("Text::AbstractGlyphCache::image(): feature advertised but not implemented", Image2D{PixelFormat::R8Unorm}); |
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} |
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}}
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