Hand-apply 80562fe5dce5fd625da583ca6f7c2833f9db8754 from master (remove default scale...

[dcpomatic.git] / src / lib / ratio.cc

diff --git a/src/lib/ratio.cc b/src/lib/ratio.cc
index 275f4ef15ab5215a14b6679b6e52ed58b01b77dd..bc83ae87c4059d0ba07b5d2d50cba70c64ec7c1c 100644 (file)
--- a/src/lib/ratio.cc
+++ b/src/lib/ratio.cc
@@ -24,7 +24,6 @@
 #include "i18n.h"
 
 using std::string;
-using std::stringstream;
 using std::vector;
 
 vector<Ratio const *> Ratio::_ratios;
@@ -32,12 +31,12 @@ vector<Ratio const *> Ratio::_ratios;
 void
 Ratio::setup_ratios ()
 {
-       _ratios.push_back (new Ratio (float(1290) / 1080, "119", _("1.19"), "F"));
-       _ratios.push_back (new Ratio (float(1440) / 1080, "133", _("4:3"), "F"));
-       _ratios.push_back (new Ratio (float(1480) / 1080, "137", _("Academy"), "F"));
-       _ratios.push_back (new Ratio (float(1485) / 1080, "138", _("1.375"), "F"));
-       _ratios.push_back (new Ratio (float(1800) / 1080, "166", _("1.66"), "F"));
-       _ratios.push_back (new Ratio (float(1920) / 1080, "178", _("16:9"), "F"));
+       _ratios.push_back (new Ratio (float(1290) / 1080, "119", _("1.19"), "119"));
+       _ratios.push_back (new Ratio (float(1440) / 1080, "133", _("4:3"), "133"));
+       _ratios.push_back (new Ratio (float(1480) / 1080, "137", _("Academy"), "137"));
+       _ratios.push_back (new Ratio (float(1485) / 1080, "138", _("1.375"), "137"));
+       _ratios.push_back (new Ratio (float(1800) / 1080, "166", _("1.66"), "166"));
+       _ratios.push_back (new Ratio (float(1920) / 1080, "178", _("16:9"), "178"));
        _ratios.push_back (new Ratio (float(1998) / 1080, "185", _("Flat"), "F"));
        _ratios.push_back (new Ratio (float(2048) /  858, "239", _("Scope"), "S"));
        _ratios.push_back (new Ratio (float(2048) / 1080, "full-frame", _("Full frame"), "C"));
@@ -57,3 +56,36 @@ Ratio::from_id (string i)
 
        return *j;
 }
+
+/** @return Ratio corresponding to a given fractional ratio (+/- 0.01), or 0 */
+Ratio const *
+Ratio::from_ratio (float r)
+{
+       vector<Ratio const *>::iterator j = _ratios.begin ();
+       while (j != _ratios.end() && fabs ((*j)->ratio() - r) > 0.01) {
+               ++j;
+       }
+
+       if (j == _ratios.end ()) {
+               return 0;
+       }
+
+       return *j;
+}
+   
+Ratio const *
+Ratio::nearest_from_ratio (float r)
+{
+       Ratio const * nearest = 0;
+       float distance = FLT_MAX;
+       
+       for (vector<Ratio const *>::iterator i = _ratios.begin (); i != _ratios.end(); ++i) {
+               float const d = fabs ((*i)->ratio() - r);
+               if (d < distance) {
+                       distance = d;
+                       nearest = *i;
+               }
+       }
+
+       return nearest;
+}