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diff --git a/libcrystfel/src/integration.h b/libcrystfel/src/integration.h
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+/*
+ * integration.h
+ *
+ * Integration of intensities
+ *
+ * Copyright © 2012-2013 Deutsches Elektronen-Synchrotron DESY,
+ *                  a research centre of the Helmholtz Association.
+ *
+ * Authors:
+ *   2010-2013 Thomas White <taw@physics.org>
+ *
+ * This file is part of CrystFEL.
+ *
+ * CrystFEL 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.
+ *
+ * CrystFEL 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 CrystFEL.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef INTEGRATION_H
+#define INTEGRATION_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define INTEGRATION_DEFAULTS_RINGS (INTEGRATION_RINGS | INTEGRATION_SATURATED)
+#define INTEGRATION_DEFAULTS_REFINE (INTEGRATION_REFINE | INTEGRATION_SATURATED)
+
+/**
+ * IntegrationMethod:
+ * @INTEGRATION_NONE: No integration at all
+ * @INTEGRATION_RINGS: Predict reflections and integrate them all
+ * @INTEGRATION_REFINE: As @INTEGRATION_RINGS, but
+ *
+ * @INTEGRATION_SATURATED: Integrate saturated reflections
+ *
+ * An enumeration of all the available integration methods.
+ **/
+typedef enum {
+
+	INTEGRATION_NONE   = 0,
+
+	/* The core integration methods themselves */
+	INTEGRATION_RINGS  = 1,
+	INTEGRATION_REFINE = 2,
+
+	/* Bits at the top of the IntegrationMethod are flags which modify the
+	 * behaviour of the integration. */
+	INTEGRATION_SATURATED = 256,
+	INTEGRATION_CLOSER = 512,
+
+} IntegrationMethod;
+
+/* This defines the bits in "IntegrationMethod" which are used to represent the
+ * core of the integration method */
+#define INTEGRATION_METHOD_MASK (0xff)
+
+extern IntegrationMethod integration_method(const char *t, int *err);
+
+extern void integrate_all(struct image *image, IntegrationMethod meth,
+	                  int use_closer, double min_snr,
+	                  double ir_inn, double ir_mid, double ir_out,
+	                  int integrate_saturated);
+
+#endif	/* INTEGRATION_H */