optix::TextureSampler loadTexture( optix::Context context,
const std::string& filename,
const optix::float3& default_color )
{
bool IsHDR = false;
bool HavePPM = false;
if (filename.size() > 0)
{
std::size_t pos_back = filename.find_last_of("/\\");
std::size_t pos_point = filename.find(".");
std::string path = filename.substr(0, pos_back+1);
std::string name = filename.substr(pos_back+1, (filename.size()-pos_back)-(filename.size()-pos_point)-1);
std::string extension = filename.substr(pos_point+1);
std::string new_file = path + name + ".ppm";
std::ifstream exists(new_file);
if (exists)
{
return loadPPMTexture(context, new_file, default_color);
}
if (extension.compare("hdr") == 0 || extension.compare("HDR") == 0)
{
IsHDR = true;
}
if(!IsHDR && extension.compare("ppm") != 0 || extension.compare("PPM") != 0)
{
std::string convert = "convert.exe " + filename + " " + new_file;
system(convert.c_str());
return loadPPMTexture(context, new_file, default_color);
}
}
if (IsHDR)
{
return loadHDRTexture(context, filename, default_color);
}
else
{
return loadPPMTexture(context, filename, default_color);
}
}
SUTILAPI optix::TextureSampler loadTexture( optix::Context context,
const std::string& filename,
const optix::float3& default_color )
{
bool IsHDR = false;
size_t len = filename.length();
if(len >= 3) {
IsHDR = (filename[len-3] == 'H' || filename[len-3] == 'h') &&
(filename[len-2] == 'D' || filename[len-2] == 'd') &&
(filename[len-1] == 'R' || filename[len-1] == 'r');
}
if(IsHDR)
return loadHDRTexture(context, filename, default_color);
else
return loadPPMTexture(context, filename, default_color);
}
