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/*
Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "magick_image_proxy.h"
#include "cross.h"
#include "exceptions.h"
#include "dcpomatic_socket.h"
#include "image.h"
#include "compose.hpp"
#include <Magick++.h>
#include <libxml++/libxml++.h>
#include <iostream>
#include "i18n.h"
using std::string;
using std::cout;
using std::pair;
using std::make_pair;
using boost::shared_ptr;
using boost::optional;
using boost::dynamic_pointer_cast;
MagickImageProxy::MagickImageProxy (boost::filesystem::path path)
{
/* Read the file into a Blob */
boost::uintmax_t const size = boost::filesystem::file_size (path);
FILE* f = fopen_boost (path, "rb");
if (!f) {
throw OpenFileError (path, errno, true);
}
uint8_t* data = new uint8_t[size];
if (fread (data, 1, size, f) != size) {
delete[] data;
throw ReadFileError (path);
}
fclose (f);
_blob.update (data, size);
delete[] data;
}
MagickImageProxy::MagickImageProxy (shared_ptr<cxml::Node>, shared_ptr<Socket> socket)
{
uint32_t const size = socket->read_uint32 ();
uint8_t* data = new uint8_t[size];
socket->read (data, size);
_blob.update (data, size);
delete[] data;
}
pair<shared_ptr<Image>, int>
MagickImageProxy::image (optional<dcp::NoteHandler>, optional<dcp::Size>) const
{
boost::mutex::scoped_lock lm (_mutex);
if (_image) {
return make_pair (_image, 0);
}
Magick::Image* magick_image = 0;
string error;
try {
magick_image = new Magick::Image (_blob);
} catch (Magick::Exception& e) {
error = e.what ();
}
if (!magick_image) {
/* ImageMagick cannot auto-detect Targa files, it seems, so try here with an
explicit format. I can't find it documented that passing a (0, 0) geometry
is allowed, but it seems to work.
*/
try {
magick_image = new Magick::Image (_blob, Magick::Geometry (0, 0), "TGA");
} catch (...) {
}
}
if (!magick_image) {
/* If we failed both an auto-detect and a forced-Targa we give the error from
the auto-detect.
*/
throw DecodeError (String::compose (_("Could not decode image file (%1)"), error));
}
unsigned char const * data = static_cast<unsigned char const *>(_blob.data());
if (data[801] == 1 || magick_image->image()->colorspace == Magick::sRGBColorspace) {
/* Either:
1. The transfer characteristic in this file is "printing density"; in this case ImageMagick sets the colour space
to LogColorspace, or
2. The file is sRGB.
Empirically we find that in these cases if we subsequently call colorSpace(Magick::RGBColorspace) the colours
are very wrong. To prevent this, set the image colour space to RGB to stop the ::colorSpace call below doing
anything. See #1123 and others.
*/
magick_image->image()->colorspace = Magick::RGBColorspace;
}
magick_image->colorSpace(Magick::RGBColorspace);
dcp::Size size (magick_image->columns(), magick_image->rows());
_image.reset (new Image (AV_PIX_FMT_RGB24, size, true));
/* Write line-by-line here as _image must be aligned, and write() cannot be told about strides */
uint8_t* p = _image->data()[0];
for (int i = 0; i < size.height; ++i) {
#ifdef DCPOMATIC_HAVE_MAGICKCORE_NAMESPACE
using namespace MagickCore;
#endif
#ifdef DCPOMATIC_HAVE_MAGICKLIB_NAMESPACE
using namespace MagickLib;
#endif
magick_image->write (0, i, size.width, 1, "RGB", CharPixel, p);
p += _image->stride()[0];
}
delete magick_image;
return make_pair (_image, 0);
}
void
MagickImageProxy::add_metadata (xmlpp::Node* node) const
{
node->add_child("Type")->add_child_text (N_("Magick"));
}
void
MagickImageProxy::send_binary (shared_ptr<Socket> socket) const
{
socket->write (_blob.length ());
socket->write ((uint8_t *) _blob.data (), _blob.length ());
}
bool
MagickImageProxy::same (shared_ptr<const ImageProxy> other) const
{
shared_ptr<const MagickImageProxy> mp = dynamic_pointer_cast<const MagickImageProxy> (other);
if (!mp) {
return false;
}
if (_blob.length() != mp->_blob.length()) {
return false;
}
return memcmp (_blob.data(), mp->_blob.data(), _blob.length()) == 0;
}
AVPixelFormat
MagickImageProxy::pixel_format () const
{
return AV_PIX_FMT_RGB24;
}
size_t
MagickImageProxy::memory_used () const
{
size_t m = _blob.length();
if (_image) {
m += _image->memory_used();
}
return m;
}
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