xshmimg.h

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/* Gxsm - Gnome X Scanning Microscopy
 * universal STM/AFM/SARLS/SPALEED/... controlling and
 * data analysis software
 * 
 * Copyright (C) 1999,2000,2001,2002,2003 Percy Zahl
 *
 * Authors: Percy Zahl <zahl@users.sf.net>
 * additional features: Andreas Klust <klust@users.sf.net>
 * WWW Home: http://gxsm.sf.net
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

/* -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 8 c-style: "K&R" -*- */

#ifndef __XSHMIMG_H
#define __XSHMIMG_H

#include <stdio.h>
#include <stdlib.h>

#include <libgnome/libgnome.h>
#include <libgnomecanvas/libgnomecanvas.h>
# include <gdk-pixbuf/gdk-pixbuf.h>

#define IMGMAXCOLORENTRYS 1024

/*
 * XShm Image Object
 * ============================================================
 */

#define UUS24(N) ((U24*)((char*)uus+(3*N)))->rgb

typedef union { unsigned long rgb:24; } U24; /* Achtung sizof( U24 ) == 4 !!! */

class ShmImage2D{
 public:
  ShmImage2D(GtkWidget *area, 
             int Width, int Height, 
             int xorigin, int yorigin
             );
  ~ShmImage2D();

  void Resize(int Width, int Height);
  GnomeCanvasItem *GetGimg(){ return gitem_image; };

  unsigned long GetMaxCol(){ return maxcol; };
  void MkPalette(char *name=NULL);

  void saveimage(gchar *name);

  void SetZoomFac(int zf){ ZoomFac = zf; };

  void PutPixel(unsigned long x, unsigned long y, unsigned long val);

  void ShowPic(int xs=0, int ys=0);
  void ShowSubPic(int xs, int ys, int w, int h);
  
private:

/*my palette of greys / LookUp Table*/
  unsigned long ULColorTable[IMGMAXCOLORENTRYS+2];

  GnomeCanvasPoints *red_line_points;
  GdkPixbuf *gdk_pixbuf;

  GtkWidget *imgarea;
  GnomeCanvasItem *gitem_image;
  GnomeCanvasItem *gitem_red_line;

  unsigned int maxcol;
  int rowstride, bpp, width, height, x0, y0;
  guchar *pixels;

  int ZoomFac;
};

#endif

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