#include "Shader.h"

#include <GL/glew.h>
#include <GLFW/glfw3.h>

void Shader::bind() const {
    glUseProgram(handle);
}

void Shader::release() const {
    glUseProgram(0);
}

int Shader::uniform(const std::string &name) {
    // Is it already in the map?
    auto it = locationMap.find(name);
    if (it != locationMap.end()) {
        return it->second;
    }

    // It isn't, get the uniform location and store it
    GLint location = glGetUniformLocation(handle, name.c_str());
    locationMap.insert(std::make_pair<std::string, int>(name, location));

    return location;
}

int Shader::attribute(const std::string &name) {
    // Is it already in the map?
    auto it = locationMap.find(name);
    if (it != locationMap.end()) {
        return it->second;
    }

    // It isn't, get the attribute location and store it
    GLint location = glGetAttribLocation(handle, name.c_str());
    locationMap.insert(std::make_pair<std::string, int>(name, location));

    return location;
}