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#pike __REAL_VERSION__ 
 
inherit Image._PSD; 
 
class Layer 
{ 
  string mode, name; 
  int opacity; 
  object image; 
  object alpha; 
   
  int flags; 
  int xoffset, yoffset; 
  int width, height; 
 
  int mask_flags; 
  int mask_xoffset, mask_yoffset; 
  int mask_width, mask_height; 
} 
 
int foo; 
Layer decode_layer(mapping layer, mapping i) 
{ 
//   int stt = gethrtime(); 
  Layer l = Layer(); 
  int use_cmap; 
  l->opacity = layer->opacity; 
  l->width = layer->right-layer->left; 
  l->height = layer->bottom-layer->top; 
  l->xoffset = layer->left; 
  l->yoffset = layer->top; 
  l->image = Image.image( l->width, l->height ); 
  l->mode = layer->mode; 
  l->flags = layer->flags; 
  l->name = layer->name; 
  
  l->mask_width = layer->mask_right-layer->mask_left; 
  l->mask_height = layer->mask_bottom-layer->mask_top; 
  l->mask_xoffset = layer->mask_left; 
  l->mask_yoffset = layer->mask_top; 
 
  if( !(l->mask_flags & 1 ) ) // pos relative to layer 
  { 
    l->mask_xoffset -= l->xoffset; 
    l->mask_yoffset -= l->yoffset; 
  } 
  array colors; 
  int inverted; 
 
  switch(i->mode) 
  { 
   case RGB: 
     array lays = ({}); 
     foreach( layer->channels, mapping c ) 
     { 
       string mode; 
       switch( (int)c->id ) 
       { 
        case 0: 
          mode = "red";  
          break; 
        case 1: 
          mode = "green";  
          break; 
        case 2: 
          mode = "blue";  
          break; 
       } 
       if( mode ) 
       { 
//          int st = gethrtime(); 
         if( !sizeof(lays) ) 
           lays += ({  
             Image.Layer(___decode_image_channel(l->width, 
                                                 l->height, 
                                                 c->data)) 
           }); 
         else 
           lays += (({ Image.Layer( ([ 
             "image":___decode_image_channel(l->width, l->height, c->data), 
//             "alpha_value":1.0, 
             "mode":mode,  
           ]) ) 
           })); 
//          werror(mode+" took %4.5f seconds\n", (gethrtime()-st)/1000000.0 ); 
         c->data = 0; 
       } 
     } 
//      int st = gethrtime(); 
     l->image = Image.lay( lays )->image(); 
//      werror("combine took %4.5f seconds\n", (gethrtime()-st)/1000000.0 ); 
     break; 
    case CMYK: 
     inverted = 1; 
     colors = ({ ({255,0,0,}), 
                 ({0,255,0,}), 
                 ({0,0,255,}), 
               }) + ({ 255,255,255 }) * 24; 
     l->image = Image.image( l->width, l->height, 255, 255, 255); 
     break; 
 
   case Indexed: 
     use_cmap = 1; 
     break; 
   default: 
     werror("Unsupported layer format mode ("+i->mode+"), using greyscale\n"); 
   case Greyscale: 
     colors = ({ 
       255,255,255 
     })*24; 
     break; 
  } 
//   int st = gethrtime(); 
  foreach(layer->channels, mapping c) 
  { 
    object tmp; 
 
    if( !colors && (c->id >= 0 )) 
      continue; 
 
    if( c->id != -2) 
      tmp = ___decode_image_channel(l->width, l->height, c->data); 
    else 
      tmp = ___decode_image_channel(l->mask_width,l->mask_height,c->data); 
    switch( c->id ) 
    { 
     default: 
       if(!use_cmap) 
       { 
         if(inverted) 
           l->image -= tmp*colors[c->id%sizeof(colors)]; 
         else 
           l->image += tmp*colors[c->id%sizeof(colors)]; 
       } else { 
         __apply_cmap( tmp, i->color_data ); 
         l->image = tmp; 
       } 
       break; 
     case -1: /* alpha */ 
       if(!l->alpha) 
         l->alpha = tmp; 
       else 
         l->alpha *= tmp; 
       break; 
     case -2: /* user mask */ 
       if(!(l->mask_flags & 2 )) /* layer mask disabled */ 
       { 
         array pad_color = ({ 0, 0, 0 }); 
         if( (l->mask_flags & 4 ) ) { 
           /* invert mask */ 
           tmp = tmp->invert(); 
           pad_color = ({ 255, 255, 255 }); 
         } 
 
         tmp = tmp->copy( -l->mask_xoffset, -l->mask_yoffset,  
                          l->image->xsize()-1, l->image->ysize()-1, 
                          @pad_color ) 
           ->copy(0,0,l->image->xsize()-1,l->image->ysize()-1, 
                  @pad_color); 
         if(!l->alpha) 
           l->alpha = tmp; 
         else 
           l->alpha *= tmp; 
         break; 
       } 
    } 
    c->data = 0; 
  } 
//   werror(" mode %s image %O alpha %O\n", 
//     l->mode, l->image, l->alpha ); 
//   werror("alpha/mask took %4.5f seconds\n", (gethrtime()-st)/1000000.0 ); 
//   werror("TOTAL took %4.5f seconds\n\n", (gethrtime()-stt)/1000000.0 ); 
  return l; 
} 
 
mapping __decode( mapping|string what, mapping|void options ) 
{ 
  mapping data; 
  if(mappingp(what)) 
    data = what; 
  else  
    data = ___decode( what ); 
  what=0; 
  array rl = ({}); 
  foreach( data->layers, mapping l ) 
    rl += ({ decode_layer( l, data ) }); 
 
  data->layers = rl; 
  return data; 
} 
 
 
array(object) decode_background( mapping data ) 
{ 
  object img; 
 
  if( data->image_data ) 
    img = ___decode_image_data(data->width,       data->height,  
                               data->channels,    data->mode, 
                               data->compression, data->image_data, 
 
                               data->color_data); 
  return ({ img, 0 }); 
} 
 
string translate_mode( string mode ) 
{ 
  switch( mode ) 
  { 
   case "norm":      return "normal"; 
   case "mul ":      return "multiply"; 
   case "add ":      return "add"; 
   case "diff":      return "difference"; 
   case "sub ":      return "subtract"; 
   case "diss":      return "dissolve"; 
   case "scrn":      return "screen"; 
   case "over":      return "overlay"; 
   case "dark":      return "min"; 
   case "lite":      return "max"; 
   case "hue ":      return "hue"; 
   case "div ":      return "idivide"; 
   case "hLit":      return "hardlight"; 
 
   case "colr":      return "color"; // Not 100% like photoshop. 
   case "lum ":      return "value"; // Not 100% like photoshop. 
   case "sat ":      return "saturation";// Not 100% like photoshop. 
 
      // Colorburn, not really multiply, but the best aproximation soo far. 
    case "idiv": 
     return "multiply"; 
 
     // Exclusion. Not really difference, but very close. 
    case "smud":      
     return "difference"; 
 
     // Soft light. Not really supported yet. For now, use hardlight with lower 
     // opacity. Gives a rather good aproximation. 
    case "sLit":      
     return "hardlight"; 
 
   default: 
     werror("WARNING: PSD: Unsupported mode: "+mode+". Skipping layer\n"); 
     return 0; 
  } 
} 
 
array decode_layers( string|mapping what, mapping|void opts ) 
{ 
  if(!opts) opts = ([]); 
 
  if(!mappingp( what ) ) 
    what = __decode( what ); 
   
  mapping lopts = ([ "tiled":1, ]); 
 
  if( opts->background ) 
  { 
    lopts->image = Image.Image( 32, 32, opts->background ); 
    lopts->alpha = Image.Image( 32, 32, Image.Color.white ); 
    lopts->alpha_value = 1.0; 
  } 
 
  object img, alpha; 
  if( !what->layers || !sizeof(what->layers)) 
  { 
    [ img, alpha ] = decode_background( what ); 
    if( img ) 
    { 
      lopts->image = img; 
      if( alpha ) 
        lopts->alpha = alpha; 
      else 
        lopts->alpha = 0; 
      lopts->alpha_value = 1.0; 
    } 
  } 
  array layers; 
  Image.Layer lay; 
  if( lopts->image ) 
  { 
    layers = ({ (lay=Image.Layer( lopts )) }); 
    lay->set_misc_value( "visible", 1 ); 
    lay->set_misc_value( "name",    "Background" ); 
    lay->set_misc_value( "image_guides", what->resources->guides ); 
  } 
  else 
    layers = ({}); 
 
  foreach(reverse(what->layers), object l) 
  { 
    if( !(l->flags & LAYER_FLAG_INVISIBLE) || opts->draw_all_layers ) 
    { 
      if( string m = translate_mode( l->mode ) ) 
      { 
        lay = Image.Layer( l->image, l->alpha, m ); 
 
        lay->set_misc_value( "visible", !(l->flags & LAYER_FLAG_INVISIBLE) ); 
        lay->set_misc_value( "name",      l->name ); 
        lay->set_misc_value( "image_guides", what->resources->guides ); 
        if( l->mode == "sLit" ) 
          l->opacity /= 3; 
 
        l->image = 0; l->alpha = 0; 
         
        if( l->opacity != 255 ) 
        { 
          float lo =  l->opacity / 255.0; 
          if( lay->alpha() ) 
            lay->set_image( lay->image(), lay->alpha()*lo ); 
          else 
            lay->set_image( lay->image(), Image.Image( lay->xsize(), 
                                                       lay->yszize(), 
                                                       (int)(255*lo), 
                                                       (int)(255*lo), 
                                                       (int)(255*lo))); 
        } 
 
        if (opts->crop_to_bounds) { 
          //  Crop/expand this layer so it matches the image bounds. 
          //  This will lose data which extends beyond the image bounds 
          //  but keeps the image dimensions consistent. 
          int x0 = -l->xoffset, y0 = -l->yoffset; 
          int x1 = x0 + what->width - 1, y1 = y0 + what->height - 1; 
          Image.Image new_img = 
            lay->image()->copy(x0, y0, x1, y1); 
          Image.Image new_alpha = 
            lay->alpha() && 
            lay->alpha()->copy(x0, y0, x1, y1); 
          lay->set_image(new_img, new_alpha); 
        } else 
          lay->set_offset( l->xoffset, l->yoffset ); 
 
        layers += ({ lay }); 
      } 
    } 
  } 
//   werror("%O\n", layers ); 
  return layers; 
} 
 
mapping _decode( string|mapping what, mapping|void opts ) 
{ 
  mapping data; 
  if(!opts) opts = ([]); 
  if(mappingp(what)) 
    data = what; 
  else  
    data = __decode( what ); 
  what=0; 
 
  Image.Layer res = Image.lay(decode_layers( data, opts ), 
                              0,0,data->width,data->height ); 
  Image.Image img = res->image(); 
  Image.Image alpha = res->alpha(); 
 
  return  
  ([ 
    "image":img, 
    "alpha":alpha, 
  ]); 
} 
 
Image.Image decode( string|mapping what, mapping|void opts ) 
{ 
  mapping data; 
  if(!opts) opts = ([]); 
  if(mappingp(what)) 
    data = what; 
  else  
    data = __decode( what ); 
  what=0; 
 
  Image.Layer res = Image.lay(decode_layers( data, opts ), 
                              0,0,data->width,data->height ); 
  return res->image(); 
}