61 lines
2.0 KiB
C++
61 lines
2.0 KiB
C++
/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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#pragma once
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#include <osgEarth/Common>
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#include <vector>
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#include <functional>
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#include <string>
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namespace osgEarth { namespace Util
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{
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/**
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* Utility that reads GLSL source code and lexes it into chunks that
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* you can then perform operations on.
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*/
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class OSGEARTH_EXPORT GLSLChunker
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{
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public:
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struct Chunk {
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enum Type { TYPE_STATEMENT, TYPE_DIRECTIVE, TYPE_FUNCTION, TYPE_COMMENT };
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Type type;
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std::string text;
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std::vector<std::string> tokens;
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};
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typedef std::vector<Chunk> Chunks;
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public:
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/** Read GLSL into chunks */
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void read(const std::string& input, Chunks& output) const;
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/** Write chunks (read using the read() method) back to GLSL */
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void write(const Chunks& input, std::string& output, bool reindent=true) const;
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/** Search and replace a string */
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void replace(Chunks& input, const std::string& target, const std::string& replacement) const;
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/** Dump chunks to notify (for debugging) */
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void dump(const std::string&, const Chunks&) const;
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/** Create a chunk from a line. */
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Chunk chunkLine(const std::string& line) const;
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};
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} }
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