//

// "$Id: fltk.cpp,v 1.1 2002/01/30 23:51:19 edgomez Exp $"

//

// fl_draw_image test program for the Fast Light Tool Kit (FLTK).

//

// Be sure to try every visual with the -v switch and try -m (monochrome)

// on each of them.

//

// This program requires either the libjpeg.a library or an internal DD

// library to read images (this is chosen by the presence of the "DD"

// #define).

//

// To get the jpeg library:

//

// The "official" archive site for this software is ftp.uu.net (Internet

// address 192.48.96.9).  The most recent released version can always be

// found there in directory graphics/jpeg.  This particular version will

// be archived as graphics/jpeg/jpegsrc.v6a.tar.gz.

//

// The makefile assummes you decompressed and build these in a directory

// called "jpeg-6a" in the same location as the "FL" directory.

//

// Copyright 1998-2000 by Bill Spitzak and others.

//

// This library is free software; you can redistribute it and/or

// modify it under the terms of the GNU Library General Public

// License as published by the Free Software Foundation; either

// version 2 of the License, or (at your option) any later version.

//

// This library 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

// Library General Public License for more details.

//

// You should have received a copy of the GNU Library General Public

// License along with this library; if not, write to the Free Software

// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307

// USA.

//

// Please report all bugs and problems to "fltk-bugs@fltk.org".

//



#include <FL/Fl.H>

#include <FL/fl_draw.H>

#include <stdio.h>

#include <stdlib.h>



void readtheimage(const char *name); // below

int width;

int height;

int depth;

int linedelta;

uchar *ibuffer;





#pragma comment(lib, "libjpeg.lib")





////////////////////////////////////////////////////////////////



#include <FL/Fl_Window.H>

int mono;



class image_window : public Fl_Window {

  void draw();

public:

  image_window(int w,int h) : Fl_Window(w,h) {box(FL_NO_BOX);}

};



void image_window::draw() {

  if (mono)

    fl_draw_image_mono(ibuffer+1,0,0,width,height,depth,linedelta);

  else

    fl_draw_image(ibuffer,0,0,width,height,depth,linedelta);

}



////////////////////////////////////////////////////////////////



#include <FL/x.H>

#include "list_visuals.cxx"



////////////////////////////////////////////////////////////////



int visid = -1;

int arg(int argc, char **argv, int &i) {

  if (argv[i][1] == 'm') {mono = 1; i++; return 1;}



  if (argv[i][1] == 'v') {

    if (i+1 >= argc) return 0;

    visid = atoi(argv[i+1]);

    i += 2;

    return 2;

  }



  return 0;

}



int main(int argc, char ** argv) {



  int i = 1;

  if (!Fl::args(argc,argv,i,arg) || i != argc-1) {

    fprintf(stderr,"usage: %s <switches> image_file\n"

" -v # : use visual\n"

" -m : monochrome\n"

"%s\n",

	    argv[0],Fl::help);

    exit(1);

  }



  readtheimage(argv[i]);

  image_window *window = new image_window(width,height);



  if (visid>=0) {

    /*fl_open_display();

    XVisualInfo templt; int num;

    templt.visualid = visid;

    fl_visual = XGetVisualInfo(fl_display, VisualIDMask, &templt, &num);

    if (!fl_visual) {

      fprintf(stderr, "No visual with id %d, use one of:\n",visid);

      //list_visuals();

      exit(1);

    }

    fl_colormap = XCreateColormap(fl_display, RootWindow(fl_display,fl_screen),

				fl_visual->visual, AllocNone);

    fl_xpixel(FL_BLACK); // make sure black is allocated*/

  }



  window->show(argc,argv);

  return Fl::run();

}



////////////////////////////////////////////////////////////////



extern "C" {

#include "jpeglib.h"

}



void readtheimage(const char *name) {

  struct jpeg_decompress_struct cinfo;

  struct jpeg_error_mgr jerr;

  FILE * infile = fopen(name, "rb");

  if (!infile) {

    fprintf(stderr, "can't open %s\n", name);

    exit(1);

  }

  cinfo.err = jpeg_std_error(&jerr);

  jpeg_create_decompress(&cinfo);

  jpeg_stdio_src(&cinfo, infile);

  jpeg_read_header(&cinfo, TRUE);

  jpeg_start_decompress(&cinfo);

  width = cinfo.output_width;

  height = cinfo.output_height;

  depth = cinfo.output_components;

  ibuffer = new uchar[width*height*depth];

  uchar *rp = ibuffer;

  //  for (int i=0; i<height; i++) {

  for (int i=height; i--; ) {

    jpeg_read_scanlines(&cinfo, &rp, 1);

    rp += width*depth;

  }

  jpeg_finish_decompress(&cinfo);

  jpeg_destroy_decompress(&cinfo);

  fclose(infile);

}