2 Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "magick_image_proxy.h"
23 #include "exceptions.h"
24 #include "dcpomatic_socket.h"
26 #include "compose.hpp"
28 #include <libxml++/libxml++.h>
35 using boost::shared_ptr;
36 using boost::optional;
37 using boost::dynamic_pointer_cast;
39 MagickImageProxy::MagickImageProxy (boost::filesystem::path path)
41 /* Read the file into a Blob */
43 boost::uintmax_t const size = boost::filesystem::file_size (path);
44 FILE* f = fopen_boost (path, "rb");
46 throw OpenFileError (path, errno, true);
49 uint8_t* data = new uint8_t[size];
50 if (fread (data, 1, size, f) != size) {
52 throw ReadFileError (path);
56 _blob.update (data, size);
60 MagickImageProxy::MagickImageProxy (shared_ptr<cxml::Node>, shared_ptr<Socket> socket)
62 uint32_t const size = socket->read_uint32 ();
63 uint8_t* data = new uint8_t[size];
64 socket->read (data, size);
65 _blob.update (data, size);
70 MagickImageProxy::image (optional<dcp::NoteHandler>, optional<dcp::Size>) const
72 boost::mutex::scoped_lock lm (_mutex);
78 Magick::Image* magick_image = 0;
81 magick_image = new Magick::Image (_blob);
82 } catch (Magick::Exception& e) {
87 /* ImageMagick cannot auto-detect Targa files, it seems, so try here with an
88 explicit format. I can't find it documented that passing a (0, 0) geometry
89 is allowed, but it seems to work.
92 magick_image = new Magick::Image (_blob, Magick::Geometry (0, 0), "TGA");
99 /* If we failed both an auto-detect and a forced-Targa we give the error from
102 throw DecodeError (String::compose (_("Could not decode image file (%1)"), error));
105 unsigned char const * data = static_cast<unsigned char const *>(_blob.data());
106 if (data[801] == 1) {
107 /* The transfer characteristic in this file is "printing density"; in this case ImageMagick sets the colour space
108 to LogColorspace. Empirically we find that if we subsequently call colorSpace(Magick::RGBColorspace) the colours
109 are very wrong. To prevent this, set the image colour space to RGB to stop the ::colorSpace call below doing
110 anything. See #1123 and others.
112 magick_image->image()->colorspace = Magick::RGBColorspace;
115 magick_image->colorSpace(Magick::RGBColorspace);
117 dcp::Size size (magick_image->columns(), magick_image->rows());
119 _image.reset (new Image (AV_PIX_FMT_RGB24, size, true));
121 /* Write line-by-line here as _image must be aligned, and write() cannot be told about strides */
122 uint8_t* p = _image->data()[0];
123 for (int i = 0; i < size.height; ++i) {
124 #ifdef DCPOMATIC_HAVE_MAGICKCORE_NAMESPACE
125 using namespace MagickCore;
127 #ifdef DCPOMATIC_HAVE_MAGICKLIB_NAMESPACE
128 using namespace MagickLib;
130 magick_image->write (0, i, size.width, 1, "RGB", CharPixel, p);
131 p += _image->stride()[0];
140 MagickImageProxy::add_metadata (xmlpp::Node* node) const
142 node->add_child("Type")->add_child_text (N_("Magick"));
146 MagickImageProxy::send_binary (shared_ptr<Socket> socket) const
148 socket->write (_blob.length ());
149 socket->write ((uint8_t *) _blob.data (), _blob.length ());
153 MagickImageProxy::same (shared_ptr<const ImageProxy> other) const
155 shared_ptr<const MagickImageProxy> mp = dynamic_pointer_cast<const MagickImageProxy> (other);
160 if (_blob.length() != mp->_blob.length()) {
164 return memcmp (_blob.data(), mp->_blob.data(), _blob.length()) == 0;
168 MagickImageProxy::pixel_format () const
170 return AV_PIX_FMT_RGB24;