mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
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52 lines
2.8 KiB
C++
52 lines
2.8 KiB
C++
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/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell 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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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#ifndef SIDECARCOMPRESS_H
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#define SIDECARCOMPRESS_H
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// zstd wrappers for the .ifcview format (v16+). Geometry chunks and metadata
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// blocks are stored zstd-compressed so the network pulls far fewer bytes while
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// keeping HTTP Range streaming intact (unlike server Content-Encoding, which
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// can't be byte-ranged). The baker compresses (desktop only); every loader —
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// desktop and web — decompresses. The web build links the vendored single-file
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// zstd DECODER (third_party/zstddeclib.c); desktop links the full libzstd.
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#include <cstddef>
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#include <cstdint>
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#include <vector>
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namespace SidecarCompress {
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// Decompress a zstd frame in [src, src+src_size) into dst, which must have room
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// for exactly raw_size bytes. Returns false on any zstd error or if the frame
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// doesn't expand to exactly raw_size. Available on all platforms.
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bool decompress(const std::uint8_t* src, std::size_t src_size,
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std::uint8_t* dst, std::size_t raw_size);
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#if !defined(__EMSCRIPTEN__)
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// Compress [src, src+n) with zstd at `level`. Returns the compressed frame, or
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// an empty vector on error. Bake/desktop only — the web build never compresses.
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std::vector<std::uint8_t> compress(const std::uint8_t* src, std::size_t n,
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int level);
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#endif
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} // namespace SidecarCompress
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#endif // SIDECARCOMPRESS_H
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