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   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file trgt_magickpp.cpp
   3 **      \brief Magick++ Target Module
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2007, 2008 Chris Moore
   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 ** === N O T E S ===========================================================
  22 **
  23 ** ========================================================================= */
  24
  25 /* === H E A D E R S ======================================================= */
  26
  27 #define SYNFIG_TARGET
  28
  29 #ifdef USING_PCH
  30 #       include "pch.h"
  31 #else
  32 #ifdef HAVE_CONFIG_H
  33 #       include <config.h>
  34 #endif
  35
  36 #include <ETL/misc>
  37 #include "trgt_magickpp.h"
  38
  39 #endif
  40
  41 /* === M A C R O S ========================================================= */
  42
  43 using namespace synfig;
  44 using namespace std;
  45 using namespace etl;
  46
  47 /* === G L O B A L S ======================================================= */
  48
  49 SYNFIG_TARGET_INIT(magickpp_trgt);
  50 SYNFIG_TARGET_SET_NAME(magickpp_trgt,"magick++");
  51 SYNFIG_TARGET_SET_EXT(magickpp_trgt,"gif");
  52 SYNFIG_TARGET_SET_VERSION(magickpp_trgt,"0.1");
  53 SYNFIG_TARGET_SET_CVS_ID(magickpp_trgt,"$Id$");
  54
  55 /* === M E T H O D S ======================================================= */
  56
  57 template <class Container>
  58 MagickLib::Image* copy_image_list(Container& container)
  59 {
  60         typedef typename Container::iterator Iter;
  61         MagickLib::Image* previous = 0;
  62         MagickLib::Image* first = NULL;
  63         MagickLib::ExceptionInfo exceptionInfo;
  64         MagickLib::GetExceptionInfo(&exceptionInfo);
  65         for (Iter iter = container.begin(); iter != container.end(); ++iter)
  66         {
  67                 MagickLib::Image* current;
  68
  69                 try
  70                 {
  71                         current = CloneImage(iter->image(), 0, 0, Magick::MagickTrue, &exceptionInfo);
  72
  73                         if (!first) first = current;
  74
  75                         current->previous = previous;
  76                         current->next     = 0;
  77
  78                         if ( previous != 0) previous->next = current;
  79                         previous = current;
  80                 }
  81                 catch(Magick::Warning warning) {
  82                         synfig::warning("exception '%s'", warning.what());
  83                 }
  84         }
  85
  86         return first;
  87 }
  88
  89 magickpp_trgt::~magickpp_trgt()
  90 {
  91         MagickLib::ExceptionInfo exceptionInfo;
  92         MagickLib::GetExceptionInfo(&exceptionInfo);
  93
  94         try
  95         {
  96                 bool multiple_images = images.size() != 1;
  97                 bool can_adjoin = false;
  98
  99                 if (multiple_images)
 100                 {
 101                         // check whether this file format supports multiple-image files
 102                         Magick::Image image(*(images.begin()));
 103                         image.fileName(filename);
 104                         try
 105                         {
 106                                 SetImageInfo(image.imageInfo(),Magick::MagickTrue,&exceptionInfo);
 107                                 can_adjoin = image.adjoin();
 108                         }
 109                         catch(Magick::Warning warning) {
 110                                 synfig::warning("exception '%s'", warning.what());
 111                         }
 112                 }
 113
 114                 // the file type is now in image.imageInfo()->magick and
 115                 // image.adjoin() tells us whether we can write to a single file
 116                 if (can_adjoin)
 117                 {
 118                         synfig::info("joining images");
 119                         unsigned int delay = round_to_int(100.0 / desc.get_frame_rate());
 120                         for_each(images.begin(), images.end(), Magick::animationDelayImage(delay));
 121
 122                         // optimize the images (only write the pixels that change from frame to frame
 123 #ifdef HAVE_MAGICK_OPTIMIZE
 124                         // make a completely new image list
 125                         // this is required because:
 126                         //   RemoveDuplicateLayers wants a linked list of images, and removes some of them
 127                         //   when it removes an image, it invalidates it using DeleteImageFromList, but we still have it in our container
 128                         //   when we destroy our container, the image is re-freed, failing an assertion
 129
 130                         synfig::info("copying image list");
 131                         MagickLib::Image *image_list = copy_image_list(images);
 132
 133                         synfig::info("clearing old image list");
 134                         images.clear();
 135
 136                         if (!getenv("SYNFIG_DISABLE_REMOVE_DUPS"))
 137                         {
 138                                 synfig::info("removing duplicate frames");
 139                                 try
 140                                 {
 141                                         RemoveDuplicateLayers(&image_list, &exceptionInfo);
 142                                 }
 143                                 catch(Magick::Warning warning) {
 144                                         synfig::warning("exception '%s'", warning.what());
 145                                 }
 146                         }
 147
 148                         if (!getenv("SYNFIG_DISABLE_OPTIMIZE"))
 149                         {
 150                                 synfig::info("optimizing layers");
 151                                 try
 152                                 {
 153                                         image_list = OptimizeImageLayers(image_list,&exceptionInfo);
 154                                 }
 155                                 catch(Magick::Warning warning) {
 156                                         synfig::warning("exception '%s'", warning.what());
 157                                 }
 158                         }
 159
 160                         if (!getenv("SYNFIG_DISABLE_OPTIMIZE_TRANS"))
 161                         {
 162                                 synfig::info("optimizing layer transparency");
 163                                 try
 164                                 {
 165                                         OptimizeImageTransparency(image_list,&exceptionInfo);
 166                                 }
 167                                 catch(Magick::Warning warning) {
 168                                         synfig::warning("exception '%s'", warning.what());
 169                                 }
 170                         }
 171
 172                         synfig::info("recreating image list");
 173                         insertImages(&images, image_list);
 174 #else
 175                         synfig::info("not optimizing images");
 176                         // DeconstructImages is available in ImageMagic 6.2.* but it doesn't take
 177                         // the 'dispose' method into account, so for frames with transparency where
 178                         // nothing is moving, we end up with objects disappearing when they shouldn't
 179
 180                         // linkImages(images.begin(), images.end());
 181                         // MagickLib::Image* new_images = DeconstructImages(images.begin()->image(),&exceptionInfo);
 182                         // unlinkImages(images.begin(), images.end());
 183                         // images.clear();
 184                         // insertImages(&images, new_images);
 185 #endif
 186                 }
 187                 else if (multiple_images)
 188                 {
 189                         // if we can't write multiple images to a file of this type,
 190                         // include '%04d' in the filename, so the files will be numbered
 191                         // with a fixed width, '0'-padded number
 192                         synfig::info("can't join images of this type - numbering instead");
 193                         filename = (filename_sans_extension(filename) + ".%04d" + filename_extension(filename));
 194                 }
 195
 196                 synfig::info("writing %d image%s to %s", images.size(), images.size() == 1 ? "" : "s", filename.c_str());
 197                 try
 198                 {
 199                         Magick::writeImages(images.begin(), images.end(), filename);
 200                 }
 201                 catch(Magick::Warning warning) {
 202                         synfig::warning("exception '%s'", warning.what());
 203                 }
 204         }
 205         catch(Magick::Warning warning) {
 206                 synfig::warning("exception '%s'", warning.what());
 207         }
 208         catch(Magick::Error error) {
 209                 synfig::error("exception '%s'", error.what());
 210         }
 211         catch(...) {
 212                 synfig::error("unknown exception");
 213         }
 214
 215         if (buffer1 != NULL) delete [] buffer1;
 216         if (buffer2 != NULL) delete [] buffer2;
 217         if (color_buffer != NULL) delete [] color_buffer;
 218 }
 219
 220 bool
 221 magickpp_trgt::set_rend_desc(RendDesc *given_desc)
 222 {
 223         desc = *given_desc;
 224         return true;
 225 }
 226
 227 bool
 228 magickpp_trgt::init()
 229 {
 230         width = desc.get_w();
 231         height = desc.get_h();
 232
 233         start_pointer = NULL;
 234
 235         buffer1 = new unsigned char[4*width*height];
 236         if (buffer1 == NULL)
 237                 return false;
 238
 239         buffer2 = new unsigned char[4*width*height];
 240         if (buffer2 == NULL)
 241         {
 242                 delete [] buffer1;
 243                 return false;
 244         }
 245
 246         color_buffer = new Color[width];
 247         if (color_buffer == NULL)
 248         {
 249                 delete [] buffer1;
 250                 delete [] buffer2;
 251                 return false;
 252         }
 253
 254         return true;
 255 }
 256
 257 void
 258 magickpp_trgt::end_frame()
 259 {
 260         Magick::Image image(width, height, "RGBA", Magick::CharPixel, start_pointer);
 261         if (transparent && images.begin() != images.end())
 262                 (images.end()-1)->gifDisposeMethod(Magick::BackgroundDispose);
 263         images.push_back(image);
 264 }
 265
 266 bool
 267 magickpp_trgt::start_frame(synfig::ProgressCallback *callback __attribute__ ((unused)))
 268 {
 269         previous_buffer_pointer = start_pointer;
 270
 271         if (start_pointer == buffer1)
 272                 start_pointer = buffer_pointer = buffer2;
 273         else
 274                 start_pointer = buffer_pointer = buffer1;
 275
 276         transparent = false;
 277         return true;
 278 }
 279
 280 Color*
 281 magickpp_trgt::start_scanline(int scanline __attribute__ ((unused)))
 282 {
 283         return color_buffer;
 284 }
 285
 286 bool
 287 magickpp_trgt::end_scanline()
 288 {
 289         convert_color_format(buffer_pointer, color_buffer,
 290                                                  width, PF_RGB|PF_A, gamma());
 291
 292         if (!transparent)
 293                 for (int i = 0; i < width; i++)
 294                         if (previous_buffer_pointer &&                                  // this isn't the first frame
 295                                 buffer_pointer[i*4 + 3] < 128 &&                        // our pixel is transparent
 296                                 !(previous_buffer_pointer[i*4 + 3] < 128))      // the previous frame's pixel wasn't
 297                         {
 298                                 transparent = true;
 299                                 break;
 300                         }
 301
 302         buffer_pointer += 4 * width;
 303
 304         if (previous_buffer_pointer)
 305                 previous_buffer_pointer += 4 * width;
 306
 307         return true;
 308 }