gistfile1.cpp

static Shader<type> createShaderFromFile(std::string filepath)
	{
		Shader<type> shader;

		std::string shaderSource(util::loadFileContent<std::string>(filepath));
		assert(!shaderSource.empty());

		GLint shaderLength = shaderSource.length();
		auto shaderString = shaderSource.c_str();

		gl::ShaderSource(shader.id_.get(), 1, &shaderString, &shaderLength);
		gl::CompileShader(shader.id_.get());

        GLint compileError = gl::GetError();

		GLint isCompiled = 0;
		gl::GetShaderiv(shader.id_.get(), gl::COMPILE_STATUS, &isCompiled);

		if(compileError)
		{
			std::cout << "Error: " << compileError << "." << std::endl;
		}
		else
		{
			std::cout << "No errors." << std::endl;
		}

        GLint logLength = 0;
        gl::GetShaderiv(shader.id_.get(), gl::INFO_LOG_LENGTH, &logLength);

        if(logLength > 1)
        {
            std::vector<char> infoLog(logLength);
            gl::GetShaderInfoLog(shader.id_.get(), logLength, &logLength, infoLog.data());
            
            std::cout << "Shader compilation log for " << filepath <<": " << std::endl;
            std::cout << infoLog.data() << std::endl;
        }

		assert(isCompiled == gl::TRUE_);

		return shader;
	}