interface.c

#include "interface.h"

static SDL_Surface *health_bar = NULL;
static TTF_Font *interface_font = NULL;

static void interface_exit(void)
{
  SDL_FreeSurface(health_bar);
  TTF_CloseFont(interface_font);
}
int init_interface(void)
{
  if(!(health_bar = load_image("gfx/health_bar.png")))
    return 0;
  
  if(!(interface_font = TTF_OpenFont("gfx/LiberationSans-Regular.ttf", 20)))
    return 0;
  
  atexit(interface_exit);
  return 1;
}
void blit_interface(SDL_Surface *dst)
{
  spaceship *ship = get_spaceship();
  
  SDL_Rect tmp_src, tmp_dst;
  
  SDL_Surface *tmp_surface = NULL;
  SDL_Color text_color = {0, 0, 0, 0};
  char tmp_string[256] = {0};
  
  /* draw healthbar */
  tmp_src.x = 0;
  tmp_src.y = 0;
  tmp_src.w = 2;
  tmp_src.h = health_bar->h;
  
  tmp_dst.x = 0;
  tmp_dst.y = 0;
  SDL_BlitSurface(health_bar, &tmp_src, dst, &tmp_dst);
  
  for(tmp_src.x += tmp_src.w, tmp_dst.x += tmp_src.w; tmp_dst.x < ship->hp_max/10; tmp_dst.x += tmp_src.w)
    SDL_BlitSurface(health_bar, &tmp_src, dst, &tmp_dst);
  
  SDL_BlitSurface(health_bar, &tmp_src, dst, &tmp_dst);
  tmp_src.x += tmp_src.w;
  tmp_dst.x += tmp_src.w;
  SDL_BlitSurface(health_bar, &tmp_src, dst, &tmp_dst);
  
  if(ship->hp > ship->hp_max * 0.5)
    tmp_src.x = 7;
  else if(ship->hp > ship->hp_max * 0.25)
    tmp_src.x = 8;
  else
    tmp_src.x = 9;
  
  for(tmp_dst.x = 3; tmp_dst.x < ship->hp/10; tmp_dst.x += 3)
    SDL_BlitSurface(health_bar, &tmp_src, dst, &tmp_dst);
  
  /* draw points */
  sprintf(tmp_string, "%i", ship->points);
  tmp_surface = TTF_RenderText_Blended(interface_font, tmp_string, text_color);;
  tmp_dst.x = 0;
  tmp_dst.y += health_bar->h;
  SDL_BlitSurface(tmp_surface, NULL, dst, &tmp_dst);
  SDL_FreeSurface(tmp_surface);
}