void setup(const ShaderPtr& shader, bool) override
{
shader->setVertexSource(ShaderLoader::vertexSource());
shader->setFragmentSource(ShaderLoader::fragmentSource());
shader->compile();
}
ShaderPtr
Shader::from_file(GLenum type, std::string const& filename,
std::vector<std::string> const& defines)
{
std::ifstream in(filename);
if (!in)
{
throw std::runtime_error((boost::format("%s: failed to open file") % filename).str());
}
else
{
std::vector<std::string> sources;
// add version declaration
#ifdef HAVE_OPENGLES2
sources.emplace_back("#version 100\n");
#else
sources.emplace_back("#version 330 core\n");
#endif
{ // add custom defines
std::ostringstream os;
for(auto const& def : defines)
{
auto equal_pos = def.find('=');
if (equal_pos == std::string::npos)
{
os << "#define " << def << '\n';
}
else
{
os << "#define " << def.substr(0, equal_pos) << ' ' << def.substr(equal_pos+1) << '\n';
}
}
sources.emplace_back(os.str());
}
{ // add the actual source file
std::regex include_rx("^#\\s*include\\s+\"([^\"]*)\".*$");
int line_count = 0;
std::ostringstream os;
std::string line;
while(std::getline(in, line))
{
std::smatch rx_results;
if (std::regex_match(line, rx_results, include_rx))
{
boost::filesystem::path include_filename(rx_results[1]);
if (include_filename.is_absolute())
{
include_file(include_filename.string(), os);
}
else
{
include_file((boost::filesystem::path(filename).parent_path() / include_filename).string(),
os);
}
os << "#line " << line_count << '\n';
}
else
{
os << line << '\n';
}
line_count += 1;
}
sources.emplace_back(os.str());
}
ShaderPtr shader = std::make_shared<Shader>(type);
shader->source(sources);
shader->compile();
if (!shader->get_compile_status())
{
throw std::runtime_error((boost::format("%s: error:\n %s") % filename % shader->get_info_log()).str());
}
//log_debug("%s: shader compile successful", filename);
return shader;
}
}
