#include "gfx.h"
#include "program.h"

namespace gfx {
    Program::Program() {
        _program_id = glCreateProgram();
    }
    Program::Program(Program&& other) : _program_id(other._program_id) {
        other._program_id = 0;
    }
    Program::~Program() {
        if (!_program_id)
            return;

        // Delete the program
        glDeleteProgram(_program_id);
    }
    void Program::attach(Shader& shader) {
        glAttachShader(_program_id, shader.shader_id());
    }
    void Program::link() {
        glLinkProgram(_program_id);
    }
    void Program::use() {
        if (state::current_program_id == _program_id)
            return;
        
        glUseProgram(_program_id);
        state::current_program_id = _program_id;
    }
    GLuint Program::program_id() {
        return _program_id;
    }
}