shared_ptr load_program()

in roboschool/cpp-household/render-simple.cpp [80:115]

• 32 lines of code
• 10 McCabe index (conditional complexity)

shared_ptr<QGLShaderProgram> load_program(
	const std::string& vert_fn, const std::string& geom_fn, const std::string& frag_fn,
	const char* vert_defines, const char* geom_defines, const char* frag_defines)
{
	shared_ptr<QGLShaderProgram> prog(new QGLShaderProgram);
	std::string common_header;

	if (!vert_fn.empty()) {
		std::string vert_prog_text = read_file(glsl_path + "/" + vert_fn);
		common_header = "";
		if (vert_defines) common_header += vert_defines;
		prog->addShaderFromSourceCode(QGLShader::Vertex, (common_header + vert_prog_text).c_str());
		if (!prog->log().isEmpty())
			fprintf(stderr, "%s LOG: '%s'\n", vert_fn.c_str(), prog->log().toUtf8().data());
	}

	if (!geom_fn.empty()) {
		std::string geom_prog_text = read_file(glsl_path + "/" + geom_fn);
		common_header = "";
		if (geom_defines) common_header += geom_defines;
		prog->addShaderFromSourceCode(QGLShader::Geometry, (common_header + geom_prog_text).c_str());
		if (!prog->log().isEmpty())
			fprintf(stderr, "%s LOG: '%s'\n", geom_fn.c_str(), prog->log().toUtf8().data());
	}

	if (!frag_fn.empty()) {
		std::string frag_prog_text = read_file(glsl_path + "/" + frag_fn);
		common_header = "";
		if (frag_defines) common_header += frag_defines;
		prog->addShaderFromSourceCode(QGLShader::Fragment, (common_header + frag_prog_text).c_str());
		if (!prog->log().isEmpty())
			fprintf(stderr, "%s LOG: '%s'\n", frag_fn.c_str(), prog->log().toUtf8().data());
	}

	return prog;
}