[Image] Improved cover art handling

src/image/Image.cpp

@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2015 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS 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 LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "logger/Logger.hpp"
+
+#include "Image.hpp"
+
+
+namespace Image {
+
+static
+std::string format_to_magick(Format format)
+{
+	switch (format)
+	{
+		case Format::JPEG: return "JPEG";
+	}
+
+	return "JPEG";
+}
+
+std::string format_to_mimeType(Format format)
+{
+	switch (format)
+	{
+		case Format::JPEG: return "JPEG";
+	}
+
+	return "application/octet-stream";
+}
+
+void
+init(const char *path)
+{
+	Magick::InitializeMagick(path);
+}
+
+bool
+Image::load(const std::vector<unsigned char>& rawData)
+{
+	try
+	{
+		Magick::Blob blob(&rawData[0], rawData.size());
+		_image.read(blob);
+
+		return true;
+	}
+	catch (Magick::Exception& e)
+	{
+		LMS_LOG(COVER, ERROR) << "Caught Magick exception while loading raw image: " << e.what();
+		return false;
+	}
+}
+
+bool
+Image::load(boost::filesystem::path p)
+{
+	try
+	{
+		_image.read(p.string());
+
+		return true;
+	}
+	catch (Magick::Exception& e)
+	{
+		LMS_LOG(COVER, ERROR) << "Caught Magick exception while loading image from file '" << p << "': " << e.what();
+		return false;
+	}
+}
+
+bool
+Image::scale(std::size_t size)
+{
+	if (!size)
+		return false;
+
+	try
+	{
+		_image.resize( Magick::Geometry(size, size ) );
+
+		return true;
+	}
+	catch (Magick::Exception& e)
+	{
+		LMS_LOG(COVER, ERROR) << "Caught Magick exception: " << e.what();
+		return false;
+	}
+}
+
+void
+Image::save(std::vector<unsigned char>& data, Format format) const
+{
+	Magick::Image outputImage(_image);
+
+	outputImage.magick( format_to_magick(format));
+
+	Magick::Blob blob;
+	outputImage.write(&blob);
+
+	unsigned char *charBuf = (unsigned char*)blob.data();
+	data.assign( charBuf, charBuf + blob.length() );
+}
+
+} // namespace Image

src/image/Image.hpp

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2015 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS 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 LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <vector>
+
+#include <boost/filesystem/path.hpp>
+
+#include <Magick++.h>
+
+namespace Image
+{
+
+enum class Format
+{
+	JPEG,
+};
+
+std::string format_to_mimeType(Format format);
+
+void init(const char *path);
+
+class Image
+{
+	public:
+
+		// input
+		bool	load(const std::vector<unsigned char>& rawData);
+		bool	load(boost::filesystem::path p);
+
+		// Operations
+		bool	scale(std::size_t size);
+
+		// output
+		void	save(std::vector<unsigned char>& rawData, Format format) const;
+
+	private:
+		Magick::Image	_image;
+};
+
+
+} // namespace Image
+