synfig-core/trunk/src/synfig/layer_composite.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file layer_composite.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 */
  21 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include "layer_composite.h"
  33 #include "context.h"
  34 #include "time.h"
  35 #include "color.h"
  36 #include "surface.h"
  37 #include "renddesc.h"
  38 #include "target.h"
  39
  40 #include "layer_bitmap.h"
  41
  42 #include "general.h"
  43 #include "render.h"
  44 #include "paramdesc.h"
  45
  46 #endif
  47
  48 /* === U S I N G =========================================================== */
  49
  50 using namespace std;
  51 using namespace etl;
  52 using namespace synfig;
  53
  54 /* === M A C R O S ========================================================= */
  55
  56 /* === G L O B A L S ======================================================= */
  57
  58 /* === P R O C E D U R E S ================================================= */
  59
  60 /* === M E T H O D S ======================================================= */
  61
  62 bool
  63 Layer_Composite::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc_, ProgressCallback *cb)  const
  64 {
  65         RendDesc renddesc(renddesc_);
  66
  67         if(!amount_)
  68                 return context.accelerated_render(surface,quality,renddesc,cb);
  69
  70         CanvasBase image;
  71
  72         SuperCallback stageone(cb,0,50000,100000);
  73         SuperCallback stagetwo(cb,50000,100000,100000);
  74
  75         Layer_Bitmap::Handle surfacelayer(new class Layer_Bitmap());
  76
  77         Context iter;
  78
  79         for(iter=context;*iter;iter++)
  80                 image.push_back(*iter);
  81
  82         image.push_front(surfacelayer.get());
  83
  84         // We want to go ahead and schedule any other
  85         // layers...
  86 //      while(dynamic_cast<Layer_Composite*>(context->get()))
  87 //      while(context->get() &&
  88 //              &context->get()->AcceleratedRender==
  89 //              &Layer_Composite::AcceleratedRender)
  90 //              image.push_back(*(context++));
  91
  92         image.push_back(0);     // Alpha black
  93
  94         // Render the backdrop
  95         if(!context.accelerated_render(&surfacelayer->surface,quality,renddesc,&stageone))
  96                 return false;
  97
  98         if(quality<=4)surfacelayer->c=3;else
  99         if(quality<=5)surfacelayer->c=2;
 100         else if(quality<=6)surfacelayer->c=1;
 101         else surfacelayer->c=0;
 102         surfacelayer->tl=renddesc.get_tl();
 103         surfacelayer->br=renddesc.get_br();
 104         surfacelayer->set_blend_method(Color::BLEND_STRAIGHT);
 105
 106         image.push_front(const_cast<synfig::Layer_Composite*>(this));
 107
 108         // Set up a surface target
 109         Target::Handle target(surface_target(surface));
 110
 111         if(!target)
 112         {
 113                 if(cb)cb->error(_("Unable to create surface target"));
 114                 return false;
 115         }
 116
 117         RendDesc desc(renddesc);
 118
 119         target->set_rend_desc(&desc);
 120
 121         // Render the scene
 122         return render(Context(image.begin()),target,desc,&stagetwo);
 123         //return render_threaded(Context(image.begin()),target,desc,&stagetwo,2);
 124 }
 125
 126 Rect
 127 Layer_Composite::get_full_bounding_rect(Context context)const
 128 {
 129         if(is_disabled() || Color::is_onto(get_blend_method()))
 130                 return context.get_full_bounding_rect();
 131
 132         return context.get_full_bounding_rect()|get_bounding_rect();
 133 }
 134
 135 Layer::Vocab
 136 Layer_Composite::get_param_vocab()const
 137 {
 138         Layer::Vocab ret(Layer::get_param_vocab());
 139
 140         ret.push_back(ParamDesc(amount_,"amount")
 141                 .set_local_name(_("Amount"))
 142         );
 143         ret.push_back(ParamDesc(blend_method_,"blend_method")
 144                 .set_local_name(_("Blend Method"))
 145         );
 146
 147         return ret;
 148 }
 149
 150 bool
 151 Layer_Composite::set_param(const String & param, const ValueBase &value)
 152 {
 153         if(param=="amount" && value.same_type_as(amount_))
 154                 amount_=value.get(amount_);
 155         else
 156         if(param=="blend_method" && value.same_type_as(int()))
 157         {
 158                 blend_method_ = static_cast<Color::BlendMethod>(value.get(int()));
 159
 160                 if (blend_method_ < 0 || blend_method_ >= Color::BLEND_END)
 161                 {
 162                         warning("illegal value (%d) for blend_method - using Composite instead", blend_method_);
 163                         blend_method_ = Color::BLEND_COMPOSITE;
 164                         return false;
 165                 }
 166
 167                 if (blend_method_ == Color::BLEND_STRAIGHT && !reads_context())
 168                 {
 169                         Canvas::Handle canvas(get_canvas());
 170                         if (canvas)
 171                         {
 172                                 String version(canvas->get_version());
 173
 174                                 if (version == "0.1" || version == "0.2")
 175                                 {
 176                                         if (get_name() == "PasteCanvas")
 177                                                 warning("loaded a version %s canvas with a 'Straight' blended PasteCanvas (%s) - check it renders OK",
 178                                                                 version.c_str(), get_non_empty_description().c_str());
 179                                         else
 180                                         {
 181                                                 blend_method_ = Color::BLEND_COMPOSITE;
 182                                                 converted_blend_ = true;
 183
 184                                                 // if this layer has a transparent color, go back and set the color again
 185                                                 // now that we know we are converting the blend method as well.  that will
 186                                                 // make the color non-transparent, and change the blend method to alpha over
 187                                                 if (transparent_color_)
 188                                                         set_param("color", get_param("color"));
 189                                         }
 190                                 }
 191                         }
 192                 }
 193         }
 194         else
 195                 return Layer::set_param(param,value);
 196         return true;
 197 }
 198
 199 ValueBase
 200 Layer_Composite::get_param(const String & param)const
 201 {
 202         if(param=="amount")
 203                 return get_amount();
 204         if(param=="blend_method")
 205                 return static_cast<int>(get_blend_method());
 206         return Layer::get_param(param);
 207 }