/usr/include/osgEarth/NativeProgramAdapter is in libosgearth-dev 2.7.0+dfsg-2+b3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | /* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2015 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTH_NATIVE_PROGRAM_ADAPTER
#define OSGEARTH_NATIVE_PROGRAM_ADAPTER
#include <osg/State>
#include <osg/Uniform>
#include <osg/GL2Extensions>
#include <osg/Referenced>
#include <osg/MixinVector>
#include <osgEarth/Notify>
#include <vector>
#undef LC
#define LC "[NativeProgramAdapter] "
//#undef OE_DEBUG
//#define OE_DEBUG OE_INFO
namespace osgEarth
{
/**
* Wraps a native glProgram handle so we can earch it form uniforms and
* apply values to them.
*/
class NativeProgramAdapter : public osg::Referenced
{
public:
/** Create a program adapter under the current state that wraps the provided glProgram handle. */
NativeProgramAdapter(const osg::State* state, GLint handle, const char* prefix = 0L)
{
OE_DEBUG << LC << "Create adapter for glProgram " << handle << "\n";
_handle = handle;
_ext = osg::GL2Extensions::Get( state->getContextID(), true );
GLint numUniforms = 0;
GLsizei maxLen = 0;
_ext->glGetProgramiv( _handle, GL_ACTIVE_UNIFORMS, &numUniforms );
_ext->glGetProgramiv( _handle, GL_ACTIVE_UNIFORM_MAX_LENGTH, &maxLen );
if ( (numUniforms > 0) && (maxLen > 1) )
{
GLint size = 0;
GLenum type = 0;
GLchar* name = new GLchar[maxLen];
for( GLint i = 0; i < numUniforms; ++i )
{
_ext->glGetActiveUniform( _handle, i, maxLen, 0, &size, &type, name );
if ( !prefix || (::strlen(name) >= ::strlen(prefix) && ::strncmp(name, prefix, ::strlen(prefix)) == 0) )
{
GLint loc = _ext->glGetUniformLocation( _handle, name );
if ( loc != -1 )
{
_uniformLocations[osg::Uniform::getNameID(reinterpret_cast<const char*>(name))] = loc;
OE_DEBUG << LC << " Uniform = \"" << name << "\", location = " << loc << "\n";
}
}
}
}
else
{
OE_DEBUG << LC << " No uniforms found.\n";
}
}
void apply(const osg::State* state)
{
reinterpret_cast<const StateEx*>(state)->applyUniformsToProgram(*this);
}
private:
GLint _handle;
typedef std::map<unsigned, GLint> UniformMap;
UniformMap _uniformLocations;
const osg::GL2Extensions* _ext;
/** Apply the uniform to this program, optionally calling glUseProgram if necessary. */
bool apply(const osg::Uniform* uniform, bool useProgram) const
{
UniformMap::const_iterator location = _uniformLocations.find( uniform->getNameID() );
if ( location != _uniformLocations.end() )
{
if ( useProgram )
_ext->glUseProgram( _handle );
uniform->apply( _ext, location->second );
return true;
}
else return false;
}
struct StateEx : public osg::State
{
void applyUniformsToProgram(const NativeProgramAdapter& adapter) const
{
bool useProgram = true;
for(UniformMap::const_iterator i = _uniformMap.begin(); i != _uniformMap.end(); ++i)
{
const UniformStack& as = i->second;
if ( !as.uniformVec.empty() )
{
const osg::Uniform* uniform = as.uniformVec.back().first;
if (adapter.apply(uniform, useProgram))
useProgram = false;
}
}
}
};
friend struct StateEx;
};
/**
* Collection of program adapters.
*/
class NativeProgramAdapterCollection: public osg::MixinVector< osg::ref_ptr<NativeProgramAdapter> >
{
public:
void apply(const osg::State* state) const
{
for(const_iterator i = begin(); i != end(); ++i )
i->get()->apply( state );
}
};
}
#undef LC
#endif // OSGEARTH_NATIVE_PROGRAM_ADAPTER
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