#include "SDL.h"
#include "SDL_ttf.h"
#include <SDL_opengl.h>
#include <fstream>

const int SCREEN_WIDTH = 800;
const int SCREEN_HEIGHT = 600;
const int SCREEN_BPP = 32;

SDL_Surface* screen = NULL;
TTF_Font *fntCourier;

void drawText(char * text);
void render();
bool init();

void render() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();

    drawText("some text");

    SDL_GL_SwapBuffers();
}

void drawText(char * text) {
    glLoadIdentity();
    SDL_Color clrFg = {60,60,60};
    SDL_Surface *sText;
    sText = TTF_RenderUTF8_Solid( fntCourier, "lols", clrFg);
    GLuint texture[1]; // done because glGenTextures expects an array, even though array[1] == *GLuint
    if(sText == NULL) {
        return;
    }
    glGenTextures(1, texture);
    glBindTexture(GL_TEXTURE_2D, *texture);
    std::fstream myfile;
    myfile.open("lol.txt");
    for(int i = 0; i < sText->w; ++i) {
        for(int j = 0; j < sText->h; ++j) { // this will print out BGR
            myfile << (((int*)(sText->pixels))[j*sText->h+i] & 0xFF) << ((((int*)(sText->pixels))[j*sText->h+i] >> 8) & 0xFF) << ((((int*)(sText->pixels))[j*sText->h+i] >> 16) & 0xFF) << " ";
        }
        myfile << std::endl;
    }
    myfile.close();
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, sText->w, sText->h, 0, GL_RGB, GL_UNSIGNED_BYTE, sText->pixels);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    glBegin(GL_QUADS); {
            glTexCoord2i(0, 0); glVertex3f(0, 0, 0);
            glTexCoord2i(1, 0); glVertex3f(sText->w, 0, 0);
            glTexCoord2i(1, 1); glVertex3f(sText->w, sText->h, 0);
            glTexCoord2i(0, 1); glVertex3f(0, sText->h, 0);
    } glEnd();
    SDL_FreeSurface( sText );
    glDeleteTextures( 1, texture );
}

bool init() {
    SDL_Init(SDL_INIT_EVERYTHING);
    TTF_Init();

    SDL_GL_SetAttribute(SDL_GL_RED_SIZE,   8);
    SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
    SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE,  8);
    SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);

    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE,  16);
    SDL_GL_SetAttribute(SDL_GL_BUFFER_SIZE, 32);

    SDL_GL_SetAttribute(SDL_GL_ACCUM_RED_SIZE,   8);
    SDL_GL_SetAttribute(SDL_GL_ACCUM_GREEN_SIZE, 8);
    SDL_GL_SetAttribute(SDL_GL_ACCUM_BLUE_SIZE,  8);
    SDL_GL_SetAttribute(SDL_GL_ACCUM_ALPHA_SIZE, 8);

    SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
    SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 2);

    screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_HWSURFACE | SDL_GL_DOUBLEBUFFER | SDL_OPENGL);
    if(screen == NULL) return false;

    glClearColor(0, 0, 0, 0);
    glClearDepth(1.0f);
    glViewport(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0, SCREEN_WIDTH, 0, SCREEN_HEIGHT, 1, -1);
    glMatrixMode(GL_MODELVIEW);

    glEnable(GL_TEXTURE_2D);
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

    glLoadIdentity();

    SDL_WM_SetCaption("drawText", NULL);

    fntCourier = TTF_OpenFont( "Fonts\\cour.ttf", 26 );
    if(fntCourier == NULL) return false;

    return true;
}

int main( int argc, char* argv[] ) {

        if(init() == false) return 1;

        render();

        system("pause");

        SDL_FreeSurface(screen);
        TTF_CloseFont(fntCourier);
        TTF_Quit();
        SDL_Quit();
        return 0;
}