--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/DLD-FUNCTIONS/__magick_read__.cc	Sat Jul 12 10:11:30 2008 -0400
@@ -0,0 +1,364 @@
+/*
+
+Copyright (C) 2002 Andy Adler
+              2008 Thomas L. Scofield
+
+This file is part of Octave.
+
+Octave 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 3 of the License, or (at your
+option) any later version.
+
+Octave 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 Octave; see the file COPYING.  If not, see
+<http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include <octave/oct.h>
+#include <GraphicsMagick/Magick++.h>
+#include <iostream>
+using namespace std;
+using namespace Magick;
+
+unsigned int
+scaleQuantumToDepth (const Quantum &_quantum, unsigned int depth)
+{
+  return (static_cast<unsigned int> (static_cast<double>(_quantum) / 
+                                     MaxRGB * ((1 << depth) - 1)));
+}
+
+octave_value_list
+read_indexed_images( vector<Image> imvec, Array<int> frameidx, bool wantalpha )
+{
+  octave_value_list output;
+  int rows = imvec[0].baseRows ();
+  int columns = imvec[0].baseColumns ();
+  int nframes = frameidx.length ();
+  ImageType type = imvec[0].type ();
+    
+  unsigned int mapsize = imvec[0].colorMapSize ();
+  int i = mapsize;
+  unsigned int depth = 0;
+  while (i >>= 1) depth++;
+  i = 0;
+  depth--;
+  while (depth >>= 1) i++;
+  depth = 1 << i;
+
+  int x, y, frame;
+  const IndexPacket *pix;
+  switch (depth)
+    {
+    case 1:
+    case 2:
+    case 4:
+    case 8:
+      {
+      uint8NDArray im = uint8NDArray(dim_vector ( rows, columns, nframes ));
+      for (frame=0; frame < nframes; frame++)
+        {
+        imvec[frameidx(frame)].getConstPixels ( 0, 0, columns, rows );
+        pix = imvec[frameidx(frame)].getConstIndexes ();
+        i = 0;      
+        for ( y=0; y < rows; y++ )
+          for ( x=0; x < columns; x++ )
+            im(y, x, frame) = static_cast<octave_uint8>(pix[i++]);
+        }
+      im.chop_trailing_singletons ();
+      output(0) = octave_value (im);
+      }
+      break;
+    case 16:
+      {
+      uint16NDArray im = uint16NDArray(dim_vector( rows, columns, nframes ));
+      for (frame=0; frame < nframes; frame++)
+        {
+        imvec[frameidx(frame)].getConstPixels ( 0, 0, columns, rows );
+        pix = imvec[frameidx(frame)].getConstIndexes ();        
+        i = 0;      
+        for ( y=0; y < rows; y++ )
+          for ( x=0; x < columns; x++ )
+            im(y, x, frame) = static_cast<octave_uint16>(pix[i++]);
+        }
+        im.chop_trailing_singletons ();
+        output(0) = octave_value (im);
+      }
+      break;
+    default:
+      error ("Index depths bigger than 16-bit not supported");
+      return octave_value_list ();
+    }
+
+  ColorRGB c;
+  Matrix map = Matrix ( mapsize, 3 );
+  Matrix alpha;
+  switch (type)
+    {
+    case PaletteMatteType:
+/*    warning ("palettematte");
+      map = Matrix ( mapsize, 3 );
+      alpha = Matrix ( mapsize, 1 );
+      for ( i = 0; i < mapsize; i++ )
+        {
+        warning ( "%d", i );
+        c = imvec[0].colorMap (i);
+        map(i, 0) = c.red ();
+        map(i, 1) = c.green ();
+        map(i, 2) = c.blue ();
+        alpha(i, 1) = c.alpha ();                
+        }
+      break;        */
+    case PaletteType:
+      alpha = Matrix ( 0, 0 );
+      for ( i = 0; i < mapsize; i++ )
+        {
+        c = imvec[0].colorMap (i);
+        map(i, 0) = c.red ();
+        map(i, 1) = c.green ();
+        map(i, 2) = c.blue ();        
+        }
+      break;        
+    default:
+      error ("Unsupported indexed image type");
+      return octave_value_list ();
+    }
+
+  output(1) = octave_value (map);
+  if (wantalpha)
+    output(2) = octave_value (alpha);
+  return output;
+}
+
+template <class T>
+octave_value_list read_images( vector<Image> imvec, Array<int> frameidx,
+                               unsigned int depth )
+{
+  int i;
+  T im;  
+  int rows = imvec[0].baseRows ();
+  int columns = imvec[0].baseColumns ();
+  int nframes = frameidx.length ();
+  ImageType type = imvec[0].type ();
+  int x, y, frame;
+  const PixelPacket *pix;
+  dim_vector idim = dim_vector ();
+  idim.resize (4);
+  idim(0) = rows;
+  idim(1) = columns;
+  idim(2) = 1;
+  idim(3) = nframes;
+  Array<int> idx (dim_vector (4));
+  switch (type)
+    {
+    case BilevelType:
+    //    break;
+    case GrayscaleType:
+      im = T(dim_vector ( rows, columns, nframes ));
+      for ( frame=0; frame < nframes; frame++ )
+        {
+        pix = imvec[frameidx(frame)].getConstPixels ( 0, 0, columns, rows );
+        i = 0;      
+        for ( y=0; y < rows; y++ )
+          for ( x=0; x < columns; x++ )
+            im(y, x, frame) = scaleQuantumToDepth ( pix[i++].red, depth );
+        }
+      break;
+    case GrayscaleMatteType:
+      idim(2) = 2;
+      im = T(idim);
+      for ( frame=0; frame < nframes; frame++ )
+        {
+        idx(3) = frame;
+        i = 0;
+        pix = imvec[frameidx(frame)].getConstPixels ( 0, 0, columns, rows );
+        for ( y=0; y < rows; y++ )
+          {
+          idx(0) = y;
+          for ( x=0; x < columns; x++ )
+            {
+            idx(1) = x;
+            idx(2) = 0;
+            im(idx) = scaleQuantumToDepth ( pix[i].red, depth );
+            idx(2) = 1;
+            im(idx) = scaleQuantumToDepth ( pix[i].opacity, depth );
+            i++;
+            }
+          }
+        }    
+      break;
+    case PaletteType:
+    case TrueColorType:
+      idim(2) = 3;
+      im = T(idim);      
+      for ( frame=0; frame < nframes; frame++ )
+        {
+        idx(3) = frame;
+        i = 0;
+        pix = imvec[frameidx(frame)].getConstPixels ( 0, 0, columns, rows );
+        for ( y=0; y < rows; y++ )
+          {
+          idx(0) = y;
+          for ( x=0; x < columns; x++ )
+            {
+            idx(1) = x;
+            idx(2) = 0;
+            im(idx) = scaleQuantumToDepth ( pix[i].red, depth );
+            idx(2) = 1;
+            im(idx) = scaleQuantumToDepth ( pix[i].green, depth );
+            idx(2) = 2;
+            im(idx) = scaleQuantumToDepth ( pix[i].blue, depth );
+            i++;
+            }
+          }
+        }      
+      break;
+    case PaletteMatteType:
+    case TrueColorMatteType:
+    case ColorSeparationType:
+      idim(2) = 4;
+      im = T(idim);            
+      for ( frame=0; frame < nframes; frame++ )
+        {
+        idx(3) = frame;
+        i = 0;
+        pix = imvec[frameidx(frame)].getConstPixels ( 0, 0, columns, rows );
+        for ( y=0; y < rows; y++ )
+          {
+          idx(0) = y;
+          for ( x=0; x < columns; x++ )
+            {
+            idx(1) = x;
+            idx(2) = 0;
+            im(idx) = scaleQuantumToDepth ( pix[i].red, depth );
+            idx(2) = 1;
+            im(idx) = scaleQuantumToDepth ( pix[i].green, depth );
+            idx(2) = 2;
+            im(idx) = scaleQuantumToDepth ( pix[i].blue, depth );
+            idx(2) = 3;
+            im(idx) = scaleQuantumToDepth ( pix[i].opacity, depth );
+            i++;
+            }
+          }
+        }      
+      break;
+    default:
+      error ("Undefined Imagemagick image type");
+      return octave_value_list ();
+    }
+
+  im.chop_trailing_singletons ();
+  return octave_value_list (octave_value (im));
+}
+
+// instantiate templates
+template octave_value_list
+read_images<boolNDArray> ( vector<Image>, Array<int>, unsigned int depth );
+template octave_value_list
+read_images<uint8NDArray> ( vector<Image>, Array<int>, unsigned int depth );
+template octave_value_list
+read_images<uint16NDArray> ( vector<Image>, Array<int>, unsigned int depth );
+
+DEFUN_DLD ( __magick_read__, args, nargout, "\
+-*- texinfo -*-\n\
+@deftypefn {Function File} {@var{m} =} __imagemagick_read__(@var{fname}, @var{index})\n\
+@deftypefnx{Function File} {[@var{m}, @var{colormap}] =} __imagemagick_read__(@var{fname}, @var{index})\n\
+@deftypefnx{Function File} {[@var{m}, @var{colormap}, @var{alpha}] =} __imagemagick_read__(@var{fname}, @var{index})\n\
+Read images with ImageMagick++. In general you should not be using this function.\n\
+Instead you should use @code{imread}.\n\
+@seealso{imread}\n\
+@end deftypefn\n\
+" )
+{
+  octave_value_list output;
+  int i;    
+  if( args.length() > 2 || args.length() < 1 || !args(0).is_string() \
+            || nargout > 3 )
+    {
+      print_usage ();
+      return octave_value_list ();
+    }
+  Array<int> frameidx;
+  if ( args.length() == 2 && args(1).is_real_type() )
+    frameidx = args(1).int_vector_value();
+  else
+    {
+    frameidx = Array<int> (1);
+    frameidx(0) = 1;
+    }
+
+  vector<Image> imvec;
+  try
+    {
+    // Read a file into vector of image objects
+    readImages(&imvec, args(0).string_value ());
+    }
+  catch (Warning &warning_)
+    { warning ( "Magick++ warning: %s", warning_.what () ); }
+  catch (ErrorCoder &error_)
+    { warning ( "Magick++ coder error: %s", error_.what () ); }
+  catch (Exception &error_)
+    {
+    error ( "Magick++ exception: %s", error_.what () );
+    imvec.clear ();
+    return octave_value_list ();
+    }
+
+  int nframes = imvec.size ();
+  for ( i = 0; i < frameidx.length(); i++ )
+    {
+    frameidx(i) = frameidx(i) - 1;
+    if ( frameidx(i) >= nframes || frameidx(i) < 0 )
+      {
+      error ("Invalid index vector");
+      imvec.clear ();
+      return output;
+      }
+    }
+    
+  ClassType klass = imvec[0].classType ();
+  if ( klass == PseudoClass && nargout > 1 )
+    output = read_indexed_images( imvec, frameidx, (nargout == 3) );
+  else
+    {
+    unsigned int depth = imvec[0].modulusDepth ();
+    i = 0;
+    while (depth >>= 1) i++;
+    depth = 1 << i;
+    
+    switch (depth)
+      {
+      case 1:
+        output = read_images<boolNDArray> ( imvec, frameidx, depth );
+        break;
+      case 2:
+      case 4:
+      case 8:
+        output = read_images<uint8NDArray> ( imvec, frameidx, depth) ;
+        break;
+      case 16:
+        output = read_images<uint16NDArray> ( imvec, frameidx, depth );
+        break;
+      case 32:
+      case 64:
+        default:
+        error ("Image depths bigger than 16-bit not supported");
+      }
+    if (nargout > 1)
+      {
+      output(1) = Matrix ( 0, 0 );
+      if (nargout > 2)
+        output(2) = Matrix ( 0, 0 );
+      }
+    }
+  imvec.clear ();
+
+  return output;
+}