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>
37 using boost::shared_ptr;
38 using boost::optional;
39 using boost::dynamic_pointer_cast;
41 MagickImageProxy::MagickImageProxy (boost::filesystem::path path)
44 /* Read the file into a Blob */
46 boost::uintmax_t const size = boost::filesystem::file_size (path);
47 FILE* f = fopen_boost (path, "rb");
49 throw OpenFileError (path, errno, true);
52 uint8_t* data = new uint8_t[size];
53 if (fread (data, 1, size, f) != size) {
55 throw ReadFileError (path);
59 _blob.update (data, size);
63 MagickImageProxy::MagickImageProxy (shared_ptr<cxml::Node>, shared_ptr<Socket> socket)
65 uint32_t const size = socket->read_uint32 ();
66 uint8_t* data = new uint8_t[size];
67 socket->read (data, size);
68 _blob.update (data, size);
72 pair<shared_ptr<Image>, int>
73 MagickImageProxy::image (optional<dcp::NoteHandler>, optional<dcp::Size>) const
75 boost::mutex::scoped_lock lm (_mutex);
78 return make_pair (_image, 0);
81 Magick::Image* magick_image = 0;
84 magick_image = new Magick::Image (_blob);
85 } catch (Magick::Exception& e) {
90 /* ImageMagick cannot auto-detect Targa files, it seems, so try here with an
91 explicit format. I can't find it documented that passing a (0, 0) geometry
92 is allowed, but it seems to work.
95 magick_image = new Magick::Image (_blob, Magick::Geometry (0, 0), "TGA");
102 /* If we failed both an auto-detect and a forced-Targa we give the error from
106 throw DecodeError (String::compose (_("Could not decode image file %1 (%2)"), _path->string(), error));
108 throw DecodeError (String::compose (_("Could not decode image file (%1)"), error));
112 unsigned char const * data = static_cast<unsigned char const *>(_blob.data());
113 if (data[801] == 1 || magick_image->image()->colorspace == Magick::sRGBColorspace) {
115 1. The transfer characteristic in this file is "printing density"; in this case ImageMagick sets the colour space
119 Empirically we find that in these cases if we subsequently call colorSpace(Magick::RGBColorspace) the colours
120 are very wrong. To prevent this, set the image colour space to RGB to stop the ::colorSpace call below doing
121 anything. See #1123 and others.
123 magick_image->image()->colorspace = Magick::RGBColorspace;
126 magick_image->colorSpace(Magick::RGBColorspace);
128 dcp::Size size (magick_image->columns(), magick_image->rows());
130 _image.reset (new Image (AV_PIX_FMT_RGB24, size, true));
132 /* Write line-by-line here as _image must be aligned, and write() cannot be told about strides */
133 uint8_t* p = _image->data()[0];
134 for (int i = 0; i < size.height; ++i) {
135 #ifdef DCPOMATIC_HAVE_MAGICKCORE_NAMESPACE
136 using namespace MagickCore;
138 #ifdef DCPOMATIC_HAVE_MAGICKLIB_NAMESPACE
139 using namespace MagickLib;
141 magick_image->write (0, i, size.width, 1, "RGB", CharPixel, p);
142 p += _image->stride()[0];
147 return make_pair (_image, 0);
151 MagickImageProxy::add_metadata (xmlpp::Node* node) const
153 node->add_child("Type")->add_child_text (N_("Magick"));
157 MagickImageProxy::send_binary (shared_ptr<Socket> socket) const
159 socket->write (_blob.length ());
160 socket->write ((uint8_t *) _blob.data (), _blob.length ());
164 MagickImageProxy::same (shared_ptr<const ImageProxy> other) const
166 shared_ptr<const MagickImageProxy> mp = dynamic_pointer_cast<const MagickImageProxy> (other);
171 if (_blob.length() != mp->_blob.length()) {
175 return memcmp (_blob.data(), mp->_blob.data(), _blob.length()) == 0;
179 MagickImageProxy::pixel_format () const
181 return AV_PIX_FMT_RGB24;
185 MagickImageProxy::memory_used () const
187 size_t m = _blob.length();
189 m += _image->memory_used();