WIP. Scale cover art option. Seems to work

cover/CoverArt.cpp

@@ -0,0 +1,51 @@
+#include <boost/gil/image.hpp>
+#include <boost/gil/typedefs.hpp>
+#include <boost/gil/extension/io/jpeg_io.hpp>
+#include <boost/gil/extension/numeric/sampler.hpp>
+#include <boost/gil/extension/numeric/resample.hpp>
+#include <boost/gil/extension/io_new/jpeg_all.hpp>
+
+#include "CoverArt.hpp"
+
+namespace CoverArt {
+
+bool
+CoverArt::scale(std::size_t size)
+{
+	bool res = false;
+	try {
+
+		boost::gil::rgb8_image_t source;
+		boost::gil::rgb8_image_t dest(size, size);
+
+		// Read source
+		{
+			std::istringstream iss( std::string(_data.begin(), _data.end()));
+			boost::gil::read_image(iss, source, boost::gil::jpeg_tag());
+		}
+
+		// Resize
+		boost::gil::resize_view(boost::gil::const_view(source),
+				boost::gil::view(dest),
+				boost::gil::bilinear_sampler());
+
+		// Output to dest
+		{
+			std::ostringstream oss;
+			boost::gil::write_view(oss, boost::gil::const_view(dest), boost::gil::jpeg_tag());
+
+			std::string output = oss.str();
+			_data.assign(output.begin(), output.end());
+		}
+
+		res = true;
+	}
+	catch(std::exception& e)
+	{
+		std::cerr << "Caught exception: " << e.what() << std::endl;
+	}
+
+	return res;
+}
+
+} // namespace CoverArt