SLOptixHelper.cpp

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/**
 * \file      SLOptixHelper.cpp
 * \authors   Nic Dorner
 * \date      October 2019
 * \authors   Nic Dorner
 * \copyright http://opensource.org/licenses/GPL-3.0
 * \remarks   Please use clangformat to format the code. See more code style on
 *            https://github.com/cpvrlab/SLProject4/wiki/SLProject-Coding-Style
*/
 
#ifdef SL_HAS_OPTIX
#    include <optix_function_table_definition.h>
#    include <string>
#    include <fstream>
#    include <sstream>
#    include <cuda_runtime.h>
#    include <SLOptix.h>
#    include <SLOptixHelper.h>
 
//-----------------------------------------------------------------------------
static bool readSourceFile(string& str, const string& filename)
{
    // Try to open file
    std::ifstream file(filename.c_str());
    if (file.good())
    {
        // Found usable source file
        stringstream source_buffer;
        source_buffer << file.rdbuf();
        str = source_buffer.str();
        return true;
    }
    return false;
}
//-----------------------------------------------------------------------------
static string getPtxFilename(string filename)
{
    string ptxFilename;
    ptxFilename += '/';
    ptxFilename += "cuda_compile_ptx_1";
    ptxFilename += "_generated_";
    ptxFilename += filename;
    ptxFilename += ".ptx";
    return ptxFilename;
}
//-----------------------------------------------------------------------------
string getPtxStringFromFile(string       filename,
                            const char** log)
{
    if (log)
        *log = NULL;
 
    string* ptx            = new string();
    string  sourceFilePath = SLOptix::exePath +
                            "../modules/sl" +
                            getPtxFilename(filename);
 
    // Try to open source PTX file
    if (!readSourceFile(*ptx, sourceFilePath))
    {
        string err = "Couldn't open source file " + sourceFilePath;
        cout << err << endl;
        throw std::runtime_error(err.c_str());
    }
 
    return *ptx;
}
//-----------------------------------------------------------------------------
float4 make_float4(const SLVec4f& f)
{
    return {f.x, f.y, f.z, f.w};
}
//-----------------------------------------------------------------------------
float3 make_float3(const SLVec3f& f)
{
    return {f.x, f.y, f.z};
}
//-----------------------------------------------------------------------------
 
#endif // SL_HAS_OPTIX