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 **      Copyright (c) 2008 Chris Moore
  10 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 */
  22 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include "layer_composite.h"
  34 #include "context.h"
  35 #include "time.h"
  36 #include "color.h"
  37 #include "surface.h"
  38 #include "renddesc.h"
  39 #include "target.h"
  40
  41 #include "layer_bitmap.h"
  42
  43 #include "general.h"
  44 #include "render.h"
  45 #include "paramdesc.h"
  46
  47 #endif
  48
  49 /* === U S I N G =========================================================== */
  50
  51 using namespace std;
  52 using namespace etl;
  53 using namespace synfig;
  54
  55 /* === M A C R O S ========================================================= */
  56
  57 /* === G L O B A L S ======================================================= */
  58
  59 /* === P R O C E D U R E S ================================================= */
  60
  61 /* === M E T H O D S ======================================================= */
  62
  63 bool
  64 Layer_Composite::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc_, ProgressCallback *cb)  const
  65 {
  66         RendDesc renddesc(renddesc_);
  67
  68         if(!amount_)
  69                 return context.accelerated_render(surface,quality,renddesc,cb);
  70
  71         CanvasBase image;
  72
  73         SuperCallback stageone(cb,0,50000,100000);
  74         SuperCallback stagetwo(cb,50000,100000,100000);
  75
  76         Layer_Bitmap::Handle surfacelayer(new class Layer_Bitmap());
  77
  78         Context iter;
  79
  80         for(iter=context;*iter;iter++)
  81                 image.push_back(*iter);
  82
  83         image.push_front(surfacelayer.get());
  84
  85         // We want to go ahead and schedule any other
  86         // layers...
  87 //      while(dynamic_cast<Layer_Composite*>(context->get()))
  88 //      while(context->get() &&
  89 //              &context->get()->AcceleratedRender==
  90 //              &Layer_Composite::AcceleratedRender)
  91 //              image.push_back(*(context++));
  92
  93         image.push_back(0);     // Alpha black
  94
  95         // Render the backdrop
  96         if(!context.accelerated_render(&surfacelayer->surface,quality,renddesc,&stageone))
  97                 return false;
  98
  99         if(quality<=4)surfacelayer->c=3;else
 100         if(quality<=5)surfacelayer->c=2;
 101         else if(quality<=6)surfacelayer->c=1;
 102         else surfacelayer->c=0;
 103         surfacelayer->tl=renddesc.get_tl();
 104         surfacelayer->br=renddesc.get_br();
 105         surfacelayer->set_blend_method(Color::BLEND_STRAIGHT);
 106
 107         image.push_front(const_cast<synfig::Layer_Composite*>(this));
 108
 109         // Set up a surface target
 110         Target::Handle target(surface_target(surface));
 111
 112         if(!target)
 113         {
 114                 if(cb)cb->error(_("Unable to create surface target"));
 115                 return false;
 116         }
 117
 118         RendDesc desc(renddesc);
 119
 120         target->set_rend_desc(&desc);
 121
 122         // Render the scene
 123         return render(Context(image.begin()),target,desc,&stagetwo);
 124         //return render_threaded(Context(image.begin()),target,desc,&stagetwo,2);
 125 }
 126
 127 Rect
 128 Layer_Composite::get_full_bounding_rect(Context context)const
 129 {
 130         if(is_disabled() || Color::is_onto(get_blend_method()))
 131                 return context.get_full_bounding_rect();
 132
 133         return context.get_full_bounding_rect()|get_bounding_rect();
 134 }
 135
 136 Layer::Vocab
 137 Layer_Composite::get_param_vocab()const
 138 {
 139         Layer::Vocab ret(Layer::get_param_vocab());
 140
 141         ret.push_back(ParamDesc(amount_,"amount")
 142                 .set_local_name(_("Amount"))
 143         );
 144         ret.push_back(ParamDesc(blend_method_,"blend_method")
 145                 .set_local_name(_("Blend Method"))
 146         );
 147
 148         return ret;
 149 }
 150
 151 bool
 152 Layer_Composite::set_param(const String & param, const ValueBase &value)
 153 {
 154         if(param=="amount" && value.same_type_as(amount_))
 155                 amount_=value.get(amount_);
 156         else
 157         if(param=="blend_method" && value.same_type_as(int()))
 158         {
 159                 blend_method_ = static_cast<Color::BlendMethod>(value.get(int()));
 160
 161                 if (blend_method_ < 0 || blend_method_ >= Color::BLEND_END)
 162                 {
 163                         warning("illegal value (%d) for blend_method - using Composite instead", blend_method_);
 164                         blend_method_ = Color::BLEND_COMPOSITE;
 165                         return false;
 166                 }
 167
 168                 if (blend_method_ == Color::BLEND_STRAIGHT && !reads_context())
 169                 {
 170                         Canvas::Handle canvas(get_canvas());
 171                         if (canvas)
 172                         {
 173                                 String version(canvas->get_version());
 174
 175                                 if (version == "0.1" || version == "0.2")
 176                                 {
 177                                         if (get_name() == "PasteCanvas")
 178                                                 warning("loaded a version %s canvas with a 'Straight' blended PasteCanvas (%s) - check it renders OK",
 179                                                                 version.c_str(), get_non_empty_description().c_str());
 180                                         else
 181                                         {
 182                                                 blend_method_ = Color::BLEND_COMPOSITE;
 183                                                 converted_blend_ = true;
 184
 185                                                 // if this layer has a transparent color, go back and set the color again
 186                                                 // now that we know we are converting the blend method as well.  that will
 187                                                 // make the color non-transparent, and change the blend method to alpha over
 188                                                 if (transparent_color_)
 189                                                         set_param("color", get_param("color"));
 190                                         }
 191                                 }
 192                         }
 193                 }
 194         }
 195         else
 196                 return Layer::set_param(param,value);
 197         return true;
 198 }
 199
 200 ValueBase
 201 Layer_Composite::get_param(const String & param)const
 202 {
 203         if(param=="amount")
 204                 return get_amount();
 205         if(param=="blend_method")
 206                 return static_cast<int>(get_blend_method());
 207         return Layer::get_param(param);
 208 }