56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
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/* -*-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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#ifndef OSGEARTH_SHADER_MERGER_H
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#define OSGEARTH_SHADER_MERGER_H 1
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#include <osgEarth/GLSLChunker>
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#include <osg/Shader>
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namespace osg {
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class Program;
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}
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namespace osgEarth { namespace Util
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{
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/**
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* Merges multiple shader objects into one (per type) and installs
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* them in a program. Some platforms (like GLES) only support one
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* shader object, neccesiting this function.
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*/
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class OSGEARTH_EXPORT ShaderMerger
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{
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public:
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//! Adds a shader to the merge set
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void add(const osg::Shader* shader);
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//! Merges all shaders and installs them into the provided program.
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void merge(osg::Program* program);
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private:
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std::vector<const osg::Shader*> _shaders;
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std::set<osg::Shader::Type> _types;
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//! Merge shaders of shaders's type into shader, and returns
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//! the number of shaders merged.
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unsigned merge(osg::Shader* shader);
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};
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} }
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#endif // OSGEARTH_SHADER_MERGER_H
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