41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
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#ifndef STAR_IMAGE_METADATA_DATABASE_HPP
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#define STAR_IMAGE_METADATA_DATABASE_HPP
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#include "StarRect.hpp"
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#include "StarMap.hpp"
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#include "StarString.hpp"
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#include "StarThread.hpp"
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namespace Star {
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STAR_CLASS(ImageMetadataDatabase);
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// Caches image size, image spaces, and nonEmptyRegion completely until a
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// reload, does not expire cached values in a TTL based way like Assets,
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// because they are expensive to compute and cheap to keep around.
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class ImageMetadataDatabase {
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public:
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Vec2U imageSize(String const& path) const;
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List<Vec2I> imageSpaces(String const& path, Vec2F position, float fillLimit, bool flip) const;
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RectU nonEmptyRegion(String const& path) const;
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private:
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// Removes image processing directives that don't affect image spaces /
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// non-empty regions.
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static String filterProcessing(String const& path);
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Vec2U calculateImageSize(String const& path) const;
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// Path, position, fillLimit, and flip
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typedef tuple<String, Vec2I, float, bool> SpacesEntry;
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mutable Mutex m_mutex;
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mutable StringMap<Vec2U> m_sizeCache;
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mutable HashMap<SpacesEntry, List<Vec2I>> m_spacesCache;
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mutable StringMap<RectU> m_regionCache;
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};
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}
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#endif
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