From b96ad1327c25d5de8d61ed73a1c0e207e67f1226 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Thu, 11 Oct 2012 01:18:24 +0100
Subject: Use PNG for thumbs so that we get alpha blending in wxwidgets.

---
 src/lib/imagemagick_encoder.cc | 99 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 src/lib/imagemagick_encoder.cc

(limited to 'src/lib/imagemagick_encoder.cc')

diff --git a/src/lib/imagemagick_encoder.cc b/src/lib/imagemagick_encoder.cc
new file mode 100644
index 000000000..b7b79ed0c
--- /dev/null
+++ b/src/lib/imagemagick_encoder.cc
@@ -0,0 +1,99 @@
+/*
+    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+/** @file src/imagemagick_encoder.cc
+ *  @brief An encoder that writes image files using ImageMagick (and does nothing with audio).
+ */
+
+#include <stdexcept>
+#include <vector>
+#include <sstream>
+#include <iomanip>
+#include <iostream>
+#include <fstream>
+#include <boost/filesystem.hpp>
+#include <Magick++/Image.h>
+#include "imagemagick_encoder.h"
+#include "film.h"
+#include "film_state.h"
+#include "options.h"
+#include "exceptions.h"
+#include "image.h"
+#include "subtitle.h"
+
+using namespace std;
+using namespace boost;
+
+/** @param s FilmState of the film that we are encoding.
+ *  @param o Options.
+ *  @param l Log.
+ */
+ImageMagickEncoder::ImageMagickEncoder (shared_ptr<const FilmState> s, shared_ptr<const Options> o, Log* l)
+	: Encoder (s, o, l)
+{
+	
+}
+
+void
+ImageMagickEncoder::process_video (shared_ptr<Image> image, int frame, shared_ptr<Subtitle> sub)
+{
+	shared_ptr<Image> scaled = image->scale_and_convert_to_rgb (_opt->out_size, _opt->padding, _fs->scaler);
+
+	string tmp_file = _opt->frame_out_path (frame, true);
+	Magick::Image thumb (_opt->out_size.width, _opt->out_size.height, "RGB", MagickCore::CharPixel, scaled->data()[0]);
+	thumb.magick ("PNG");
+	thumb.write (tmp_file);
+	filesystem::rename (tmp_file, _opt->frame_out_path (frame, false));
+
+	if (sub) {
+		float const x_scale = float (_opt->out_size.width) / _fs->size.width;
+		float const y_scale = float (_opt->out_size.height) / _fs->size.height;
+
+		string tmp_metadata_file = _opt->frame_out_path (frame, false, ".sub");
+		ofstream metadata (tmp_metadata_file.c_str ());
+		
+		list<shared_ptr<SubtitleImage> > images = sub->images ();
+		int n = 0;
+		for (list<shared_ptr<SubtitleImage> >::iterator i = images.begin(); i != images.end(); ++i) {
+			stringstream ext;
+			ext << ".sub." << n << ".png";
+
+			Size new_size = (*i)->image()->size ();
+			new_size.width *= x_scale;
+			new_size.height *= y_scale;
+			shared_ptr<Image> scaled = (*i)->image()->scale (new_size, _fs->scaler);
+			
+			string tmp_sub_file = _opt->frame_out_path (frame, true, ext.str ());
+			Magick::Image sub_thumb (scaled->size().width, scaled->size().height, "RGBA", MagickCore::CharPixel, scaled->data()[0]);
+			sub_thumb.magick ("PNG");
+			sub_thumb.write (tmp_sub_file);
+			filesystem::rename (tmp_sub_file, _opt->frame_out_path (frame, false, ext.str ()));
+
+			metadata << "image " << n << "\n"
+				 << "x " << (*i)->position().x << "\n"
+				 << "y " << (*i)->position().y << "\n";
+
+			metadata.close ();
+			filesystem::rename (tmp_metadata_file, _opt->frame_out_path (frame, false, ".sub"));
+		}
+
+	}
+	
+	frame_done (frame);
+}
-- 
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