From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 2 Nov 2021 09:56:23 +0000 (+0200)
Subject: Add a function to detect image signature without creating a loader
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=b96dd619fe0bc09f31da8bf23f195a2a9916b839;p=libs%2Fgui.git

Add a function to detect image signature without creating a loader
---

diff --git a/source/graphics/imageloader.cpp b/source/graphics/imageloader.cpp
index d2d3ef9..859a34c 100644
--- a/source/graphics/imageloader.cpp
+++ b/source/graphics/imageloader.cpp
@@ -32,6 +32,15 @@ ImageLoader::~ImageLoader()
 	delete source;
 }
 
+bool ImageLoader::detect_signature(const std::string &sig)
+{
+	Registry &registry = get_registry();
+	for(list<RegisterBase *>::const_iterator i=registry.loaders.begin(); i!=registry.loaders.end(); ++i)
+		if((*i)->detect(sig))
+			return true;
+	return false;
+}
+
 ImageLoader *ImageLoader::open_file(const string &fn)
 {
 	try
diff --git a/source/graphics/imageloader.h b/source/graphics/imageloader.h
index 1ad6cc8..fbfd4d6 100644
--- a/source/graphics/imageloader.h
+++ b/source/graphics/imageloader.h
@@ -71,6 +71,7 @@ protected:
 public:
 	virtual ~ImageLoader();
 
+	static bool detect_signature(const std::string &);
 	static ImageLoader *open_file(const std::string &);
 	static ImageLoader *open_io(IO::Seekable &);