FGFS-4.1/OpenSceneGraph
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Added reassignment of the #version line to the first entry in the source list.

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git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14688 16af8721-9629-0410-8352-f15c8da7e697
This commit is contained in:
Robert Osfield 2015-02-11 16:41:31 +00:00
parent 4a9f4aae9d
commit 9fa3defb0e
1 changed files with 45 additions and 4 deletions
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41
src/osg/Shader.cpp
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@ -633,12 +633,53 @@ void Shader::PerContextShader::compileShader(osg::State& state)
_extensions->glShaderSource( _glShaderHandle, 1, &sourceText, NULL );
}
else
{
std::string versionLine;
unsigned int lineNum = 0;
std::string::size_type previous_pos = 0;
do
{
std::string::size_type start_of_line = source.find_first_not_of(" \t", previous_pos);
std::string::size_type end_of_line = (start_of_line != std::string::npos) ? source.find_first_of("\n\r", start_of_line) : std::string::npos;
if (end_of_line != std::string::npos)
{
// OSG_NOTICE<<"A Checking line "<<lineNum<<" ["<<source.substr(start_of_line, end_of_line-start_of_line)<<"]"<<std::endl;
if ((end_of_line-start_of_line)>=8 && source.compare(start_of_line, 8, "#version")==0)
{
versionLine = source.substr(start_of_line, end_of_line-start_of_line+1);
source.insert(start_of_line, "// following version spec has been automatically reassigned to start of source list: ");
//source.erase(start_of_line, end_of_line-start_of_line);
break;
}
previous_pos = end_of_line+1<source.size() ? end_of_line+1 : std::string::npos;
}
else
{
// OSG_NOTICE<<"B Checking line "<<lineNum<<" ["<<source.substr(start_of_line, end_of_line-start_of_line)<<"]"<<std::endl;
previous_pos = std::string::npos;
}
++lineNum;
} while (previous_pos != std::string::npos);
if (!versionLine.empty())
{
// OSG_NOTICE<<"Shader::PerContextShader::compileShader() : Found #version, lineNum = "<<lineNum<<" ["<<versionLine<<"] new source = ["<<source<<"]"<<std::endl;
const GLchar* sourceText[3];
sourceText[0] = reinterpret_cast<const GLchar*>(versionLine.c_str());
sourceText[1] = reinterpret_cast<const GLchar*>(_defineStr.c_str());
sourceText[2] = reinterpret_cast<const GLchar*>(source.c_str());
_extensions->glShaderSource( _glShaderHandle, 3, sourceText, NULL );
}
else
{
const GLchar* sourceText[2];
sourceText[0] = reinterpret_cast<const GLchar*>(_defineStr.c_str());
sourceText[1] = reinterpret_cast<const GLchar*>(source.c_str());
_extensions->glShaderSource( _glShaderHandle, 2, sourceText, NULL );
}
}
_extensions->glCompileShader( _glShaderHandle );
_extensions->glGetShaderiv( _glShaderHandle, GL_COMPILE_STATUS, &compiled );