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#pike __REAL_VERSION__ 
 
 
//! @appears Image.PSD 
//! PhotoShop Document image format. 
 
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 mask_default_color; 
  //! 
} 
 
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_flags = layer->mask_flags; 
  l->mask_default_color = layer->mask_default_color; 
 
  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 = ({ l->mask_default_color }) * 3; 
         int x0 = l->xoffset - l->mask_xoffset; 
         int y0 = l->yoffset - l->mask_yoffset; 
         tmp = tmp->copy(x0, y0, 
                         x0 + l->image->xsize() - 1, 
                         y0 + l->image->ysize() - 1, 
                         @pad_color); 
 
         if(l->mask_flags & 4) /* invert mask */ 
           tmp = tmp->invert(); 
 
         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; 
} 
 
//! @decl mapping __decode(string|mapping data) 
//! 
//! Decodes a PSD image to a mapping, defined as follows. 
//! 
//! @mapping 
//!   @member int(1..24) "channels" 
//!     The number of channels in the image, including any alpha channels. 
//!   @member int(1..30000) "height" 
//!   @member int(1..30000) "width" 
//!     The image dimensions. 
//!   @member int(0..1) "compression" 
//!     1 if the image is compressed, 0 if not. 
//!   @member int(1..1)|int(8..8)|int(16..16) "depth" 
//!     The number of bits per channel. 
//!   @member int(0..4)|int(7..9) "mode" 
//!     The color mode of the file. 
//!     @int 
//!       @value 0 
//!         Bitmap 
//!       @value 1 
//!         Greyscale 
//!       @value 2 
//!         Indexed 
//!       @value 3 
//!         RGB 
//!       @value 4 
//!         CMYK 
//!       @value 7 
//!         Multichannel 
//!       @value 8 
//!         Duotone 
//!       @value 9 
//!         Lab 
//!     @endint 
//!   @member string "color_data" 
//!     Raw color data. 
//!   @member string "image_data" 
//!     Ram image data. 
//!   @member  mapping(string|int:mixed) "resources" 
//!     Additional image data. See mappping below. 
//!   @member array(Layer) "layers" 
//!     An array with the layers of the image. See mapping below. 
//! @endmapping 
//! 
//! The resources mapping. Unknown resources will be identified 
//! by their ID number (as an int). 
//! @mapping 
//!   @member string "caption" 
//!     Image caption. 
//!   @member string "url" 
//!     Image associated URL. 
//!   @member int "active_layer" 
//!     Which layer is active. 
//!   @member array(mapping(string:int)) "guides" 
//!     An array with all guides stored in the image file. 
//!     @mapping 
//!       @member int "pos" 
//!         The position of the guide. 
//!       @member int(0..1) "vertical" 
//!         1 if the guide is vertical, 0 if it is horizontal. 
//!     @endmapping 
//!   @member mapping(string:int) "resinfo" 
//!     Resolution information 
//!     @mapping 
//!       @member int "hres" 
//!       @member int "hres_unit" 
//!       @member int "width_unit" 
//!       @member int "vres" 
//!       @member int "vres_unit" 
//!       @member int "height_unit" 
//!         FIXME: Document these. 
//!     @endmapping 
//! @endmapping 
//! 
//! The layer members: 
//! @mapping 
//!   @member int "top" 
//!   @member int "left" 
//!   @member int "right" 
//!   @member int "bottom" 
//!     The rectangle containing the contents of the layer. 
//!   @member int "mask_top" 
//!   @member int "mask_left" 
//!   @member int "mask_right" 
//!   @member int "mask_bottom" 
//!   @member int "mask_flags" 
//!     FIXME: Document these 
//!   @member int(0..255) "opacity" 
//!     0=transparent, 255=opaque. 
//!   @member int "clipping" 
//!     0=base, 1=non-base. 
//!   @member int "flags" 
//!     bit 0=transparency protected 
//!     bit 1=visible 
//!   @member string "mode" 
//!     Blend mode. 
//!     @string 
//!       @value "norm" 
//!         Normal 
//!       @value "dark" 
//!         Darken 
//!       @value "lite" 
//!         Lighten 
//!       @value "hue " 
//!         Hue 
//!       @value "sat " 
//!         Saturation 
//!       @value "colr" 
//!         Color 
//!       @value "lum " 
//!         Luminosity 
//!       @value "mul " 
//!         Multiply 
//!       @value "scrn" 
//!         Screen 
//!       @value "diss" 
//!         Dissolve 
//!       @value "over" 
//!         Overlay 
//!       @value "hLit" 
//!         Hard light 
//!       @value "sLit" 
//!         Soft light 
//!       @value "diff" 
//!         Difference 
//!     @endstring 
//!   @member string "extra_data" 
//!     Raw extra data. 
//!   @member string "name" 
//!     The name of the layer 
//!   @member array(mapping(string:int|string)) "channels" 
//!     The channels of the layer. Each array element is a 
//!     mapping as follows 
//!     @mapping 
//!       @member int "id" 
//!         The ID of the channel 
//!         @int 
//!           @value -2 
//!             User supplied layer mask 
//!           @value -1 
//!             Transparency mask 
//!           @value 0 
//!             Red 
//!           @value 1 
//!             Green 
//!           @value 2 
//!             Blue 
//!         @endint 
//!       @member string "data" 
//!         The image data 
//!     @endmapping 
//! @endmapping 
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 }); 
} 
 
//! Convert a photoshop mode name to pike @[Image.lay] mode names 
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; 
  } 
} 
 
//! @decl array(Image.Layer) decode_layers( string data, mapping|void options ) 
//! 
//! Decodes a PSD image to an array of Image.Layer objects 
//! 
//! The layer object have the following extra variables (to be queried 
//! using @[Image.Layer()->get_misc_value]): 
//! 
//! @string 
//!   @value "image_guides" 
//!     Returns array containing guide definitions. 
//!   @value "name" 
//!     Returns string containing the name of the layer. 
//!   @value "visible" 
//!     Is 1 of the layer is visible and 0 if it is hidden. 
//! @endstring 
//! 
//! Accepts these options: 
//! @mapping 
//! @member bool "draw_all_layers" 
//!   If included, all layers will be decoded, even the non-visible ones. 
//! @member bool "crop_to_bounds" 
//!   Remove areas that are outside the image boundaries in all layers 
//! @member Image.Color "background" 
//!   If included, include a solid background layer with the given color 
//! @endmapping 
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 && lay->image()) { 
          //  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 ); 
  layers->set_misc_value( "size", ({ what->width, what->height }) ); 
  return layers; 
} 
 
//! @decl mapping _decode(string|mapping data, mapping|void options) 
//! 
//! Decodes a PSD image to a mapping, with at least an 
//! 'image' and possibly an 'alpha' object. Data is either a PSD image, or 
//! a mapping (as received from @[__decode]) 
//! 
//! @param options 
//! @mapping 
//!   @member array(int)|Image.Color "background" 
//!     Sets the background to the given color. Arrays should be in 
//!     the format ({r,g,b}). 
//! 
//!   @member bool "draw_all_layers" 
//!     Draw invisible layers as well. 
//! 
//!   @member bool "draw_guides" 
//!     Draw the guides. 
//! 
//!   @member bool "draw_selection" 
//!     Mark the selection using an overlay. 
//! 
//!   @member bool "ignore_unknown_layer_modes" 
//!     Do not asume 'Normal' for unknown layer modes. 
//! 
//!   @member bool "mark_layers" 
//!     Draw an outline around all (drawn) layers. 
//! 
//!   @member Image.Font "mark_layer_names" 
//!     Write the name of all layers using the font object, 
//! 
//!   @member bool "mark_active_layer" 
//!     Draw an outline around the active layer 
//! @endmapping 
//! 
//! @returns 
//! @mapping 
//!   @member Image.Image "image" 
//!     The image object. 
//!   @member Image.Image "alpha" 
//!     The alpha channel image object. 
//! @endmapping 
//! 
//! @note 
//!   Throws upon error in data. For more information, see @[__decode] 
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, 
    "type":"application/x-photoshop", 
  ]); 
} 
 
//! @decl Image.Image decode(string data) 
//!   Decodes a PSD image to a single image object. 
//! 
//! @note 
//!   Throws upon error in data. To get access to more information like 
//!   alpha channels and layer names, see @[_decode] and @[__decode]. 
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(); 
}