Refactor aspect ratios out of crop.cc

rtgui/aspectratios.h

@@ -0,0 +1,37 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+ *
+ *  RawTherapee is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  RawTherapee is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  2024-2024 Daniel Gao <daniel.gao.work@gmail.com>
+ */
+
+#pragma once
+
+#include <glibmm/ustring.h>
+
+#include <vector>
+
+struct AspectRatio {
+    Glib::ustring label;
+    double value;
+};
+
+// Pushes known aspect ratios to the given vector.
+//
+// Callers should populate ratios for entries like "As Imange" and "Current"
+// before calling this function.
+void fillAspectRatios(std::vector<AspectRatio>& ratios);