X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Frender%2Ftag.h;fp=source%2Frender%2Ftag.h;h=28b4fa010e8b0f12980df476f7ac8160a2c922fb;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/render/tag.h b/source/render/tag.h
new file mode 100644
index 00000000..28b4fa01
--- /dev/null
+++ b/source/render/tag.h
@@ -0,0 +1,28 @@
+#ifndef MSP_GL_TAG_H_
+#define MSP_GL_TAG_H_
+
+#include <string>
+
+namespace Msp {
+namespace GL {
+
+/**
+Provides transparent string-to-hash conversion for faster comparison.  An empty
+string is guaranteed to have an id of 0.
+*/
+struct Tag
+{
+	unsigned id;
+
+	Tag(): id(0) { }
+	Tag(const char *);
+	Tag(const std::string &s);
+
+	bool operator<(const Tag &t) const { return id<t.id; }
+	bool operator==(const Tag &t) const { return id==t.id; }
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif