TGAImporter: adopted to Magnum changes, allow direct file opening.

src/Plugins/TGAImporter/TGAImporter.cpp

@@ -28,6 +28,13 @@ namespace Magnum { namespace Plugins { namespace TGAImporter {
 
 static_assert(sizeof(TGAImporter::Header) == 18, "TGAImporter: header size is not 18 bytes");
 
+bool TGAImporter::TGAImporter::open(const string& filename) {
+    ifstream in(filename.c_str());
+    bool status = open(in);
+    in.close();
+    return status;
+}
+
 bool TGAImporter::open(std::istream& in) {
     if(_image) close();
     if(!in.good()) return false;

src/Plugins/TGAImporter/TGAImporter.h

@@ -28,10 +28,12 @@ namespace Magnum { namespace Plugins { namespace TGAImporter {
 class TGAImporter: public AbstractImporter {
     public:
         TGAImporter(Corrade::PluginManager::AbstractPluginManager* manager = 0, const std::string& plugin = ""): AbstractImporter(manager, plugin) {}
-
         inline virtual ~TGAImporter() { close(); }
 
+        inline int features() const { return OpenFile|OpenStream; }
+
         bool open(std::istream& in);
+        bool open(const std::string& filename);
         void close();
 
         inline size_t image2DCount() const { return _image ? 1 : 0; }