ZBarBuffer.H

// ZBarBuffer.H     $Revision: 1.4 $    $Date: 2003/12/10 08:54:35 $ 

#if !defined __ZBarBuffer_H

#define __ZBarBuffer_H

#include <zm/ZBarDraw.H>


/*************************************************************
 * Draw color bars (sticks) with smart bufferization by
 * merging two overlapped sticks of the same color into one
 * stick.
 *************************************************************/

class ZBarBuffer : public ZBarDraw
{
protected:

  int       prev_nocolor_bar;
  int       *start_vect;    /* line of sticks' starts */
  int       *end_vect;  /* line of sticks' ends */
  unsigned  *color_vect;    /* line of color indeces */
  ColorPixel    *pixel_vect;    /* line of real color pixels */
  enum SpecType {
    NoStick = 0,
    ColorWillBeLater,
    StickIsHere,        /* see color_vect */
    ExactColor          /* see pixel_vect */
  };

  enum SpecType *spec_vect; /* species */

  /* merges two bars and returns TRUE if it's needed flush bar
     with returned coords. */
  Logic     merge_2_bars (int& pos, int& start, int& end);

public:

  ZBarBuffer (const ZConnect& zconnect, Drawable drawable);
  ZBarBuffer (const ZDrawable& zdrawable);
  virtual ~ZBarBuffer ();

  /* set rectangle of clip drawings */
  virtual void  set_cliprect (ZRect& r);

  /* interpret position as x-coord (vertical bars -- flip FALSE)
     or as y-coord (horizontal bars -- flip TRUE) */
  virtual void  flip (Logic new_flag);

  /* draw one bar in pointed position from start to end
     with color index in attached palette (Not ColorPixel!!!) */
  virtual void  draw_bar (int pos, int start, int end,
              unsigned color);

  /* draw one bar in pointed position from start to end
     with undefined color index -- will be known after set_color() */
  virtual void  draw_bar (int pos, int start, int end);

  /* assign color index to all previously "drawn" bars */
  virtual void  set_color (unsigned color);

  /* draw one bar in pointed position from start to end
     with exact ColorPixel as a color */
  virtual void  draw_bar_cp (int pos, int start, int end,
                 ColorPixel cp);

  /* send all segment buffers to X-server */
  virtual void  flush_bars ();

};

#endif  // ZBarBuffer.H