#include "sparrowrenderer.h"
#include <glew/glew.h>
#include <iostream>
#include "glassert.h"
#include "camera.h"

SparrowRenderer::SparrowRenderer(int width, int height)
{
    glewExperimental = GL_TRUE;
    GLenum err = glewInit();
    if (GLEW_OK != err)
    {
        std::cerr << "Warning: glewInit failed!" << std::endl;
    }
    if (!GLEW_ARB_vertex_program   ||
        !GLEW_ARB_fragment_program ||
        !GLEW_ARB_texture_float    ||
        !GLEW_ARB_draw_buffers     ||
        !GLEW_ARB_framebuffer_object)
    {
        std::cerr << "Warning: Shaders not supported!" << std::endl;
    }

    std::cout << "OpenGL version " << glGetString(GL_VERSION) << std::endl;
    std::cout << "GLSL version " << glGetString(GL_SHADING_LANGUAGE_VERSION) << std::endl;

    glAssert(glEnable(GL_DEPTH_TEST));
    glAssert(glEnable(GL_CULL_FACE));
    glAssert(glEnable(GL_TEXTURE_2D));
    glAssert(glViewport(0, 0, width, height));
}

void SparrowRenderer::setScene(Scene* myScene)
{
    scene = myScene;
}

void SparrowRenderer::resize(int width, int height)
{
    glAssert(glViewport(0, 0, width, height));
    if(scene != NULL)
        scene->getCamera()->resize(width, height);
}

void SparrowRenderer::render()
{
    glAssert(glClearColor(0.60, 0.65, 0.75, 1.0));
    glAssert(glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT));
    if(scene != NULL)
        scene->drawAll();
}