#include "main.h"

#include "font.h"
#include "glapi.h"
#include <string.h>

Texture *fonttexture;

void drawChar(float x, float y, char ch, float size) {
  fonttexture->enable();

  int tx = (ch & 15) * 64;
  int ty = (ch >> 4) * 64;

  float w = size, h = size * 4 / 3;

  glEnable(GL_BLEND);
  glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_COLOR);

  glBegin(GL_QUADS);
  glTexCoord2f((tx) / 1024.0, (ty) / 1024.0);
  glVertex2f(x, y);

  glTexCoord2f((tx) / 1024.0, (ty + 64) / 1024.0);
  glVertex2f(x, y + h);

  glTexCoord2f((tx + 64) / 1024.0, (ty + 64) / 1024.0);
  glVertex2f(x + w, y + h);

  glTexCoord2f((tx + 64) / 1024.0, (ty) / 1024.0);
  glVertex2f(x + w, y);

  glEnd();

  fonttexture->disable();
}

float letterwidth[256] = {
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 0.5,  0.2,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 0.45, 0.2,  0.5,  0.6,  0.5, 0.6,  0.6,
    0.65, 0.65, 0.6, 0.65, 0.6,  0.6, 0.2,  1.0,  1.0,  1.0,  1.0, 0.5,  1.0,
    0.7,  0.6,  0.7, 0.7,  0.65, 0.6, 0.7,  0.8,  0.6,  0.7,  0.7, 0.6,  0.9,
    0.85, 0.8,  0.6, 0.9,  0.7,  0.7, 0.7,  0.7,  0.7,  1.0,  0.8, 0.7,  0.8,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 0.6,  0.6,  0.6,  0.6,  0.6, 0.5,  0.6,
    0.6,  0.2,  0.4, 0.6,  0.2,  0.8, 0.5,  0.55, 0.55, 0.55, 0.5, 0.55, 0.55,
    0.55, 0.6,  0.8, 0.6,  0.6,  0.6, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0,  1.0,  1.0, 1.0,  1.0,
    1.0,  1.0,  1.0, 1.0,  1.0,  1.0, 1.0,  1.0,  1.0};

void print(float x, float y, char *text, float size) {
  int i;
  int textlength = strlen(text);
  float px = x;
  float py = y;
  for (i = 0; i < textlength; i++) {
    unsigned char ch = text[i];
    if (ch == '\n') {
      px = x;
      py += size * 1.2;
    } else {
      drawChar(px, py, ch, size);
      px += size * letterwidth[ch];
    }
  }
}