#ifndef IMG_H
#define IMG_H

#if HAVE_BG_PIXMAP && BG_IMAGE_FROM_FILE && ENABLE_TRANSPARENCY && HAVE_PIXBUF
  #define HAVE_IMG 1
#endif

#if HAVE_IMG

#define float_to_component(d) ((d) * 65535.99)

#include <X11/extensions/Xrender.h>

class rxvt_img
{
  void alloc ();
  void destroy ();
  Picture src_picture ();

public:
  // *could* also hold the Pixmap itself
  struct pixref
  {
    int cnt;
    int w, h;
    bool ours; // false if we don't own the pixmap at all

    pixref (int w, int h)
    : cnt(1), w(w), h(h), ours(true)
    {
    }
  };

  rxvt_screen *s;
  Pixmap pm;
  pixref *ref; // shared refcnt
  int x, y, w, h, repeat;
  XRenderPictFormat *format;

  rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height);
  rxvt_img (const rxvt_img &img);

  //rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int width, int height, Pixmap pixmap);
  static rxvt_img *new_from_root (rxvt_screen *s); // get root pixmap
  static rxvt_img *new_from_file (rxvt_screen *s, const char *filename); // from pixbuf

  ~rxvt_img ();

  Pixmap steal ()
  {
    ref->ours = false;
    return pm;
  }

  // inplace
  void move (int dx, int dy)
  {
    x += dx;
    y += dy;
  }

  void repeat_mode (int repeat)
  {
    this->repeat = repeat;
  }

  void unshare (); // prepare for write
  void fill (const rxvt_color &c);
  void brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a);
  void contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a);

  void brightness (double r, double g, double b, double a = 1.)
  {
    brightness (float_to_component (r),
                float_to_component (g),
                float_to_component (b),
                float_to_component (a));
  }

  void contrast (double r, double g, double b, double a = 1.)
  {
    contrast (float_to_component (r),
              float_to_component (g),
              float_to_component (b),
              float_to_component (a));
  }

  bool render_pixbuf (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y);

  // copy
  rxvt_img *reify (); // make x, y 0, make real width/height
  rxvt_img *blur (int rh, int rv);
  rxvt_img *clone ();
  rxvt_img *sub_rect (int x, int y, int width, int height);
  rxvt_img *transform (int new_width, int new_height, double matrix[9]);
  rxvt_img *scale (int new_width, int new_height);
  rxvt_img *rotate (int new_width, int new_height, int x, int y, double phi);
  rxvt_img *convert_to (XRenderPictFormat *format, const rxvt_color &bg);
  rxvt_img *blend (rxvt_img *img, double factor);
};

#endif

#endif