1 files changed, 121 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/afp/AFPUnitConverter.java b/src/java/org/apache/fop/afp/AFPUnitConverter.java
new file mode 100644
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+++ b/src/java/org/apache/fop/afp/AFPUnitConverter.java
@@ -0,0 +1,121 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.afp;
+
+import java.awt.geom.AffineTransform;
+
+
+
+/**
+ * AFP Unit converter
+ */
+public class AFPUnitConverter {
+
+    /** the AFP state */
+    private final AFPState state;
+
+    /**
+     * Unit converter
+     *
+     * @param state the AFP state
+     */
+    public AFPUnitConverter(AFPState state) {
+        this.state = state;
+    }
+
+    /**
+     * Converts millipoints to units
+     *
+     * @param srcPts source points
+     * @param dstPts destination points
+     * @return transformed points
+     */
+    public int[] mpts2units(float[] srcPts, float[] dstPts) {
+        return transformPoints(srcPts, dstPts, true);
+    }
+
+    /**
+     * Converts points to units
+     *
+     * @param srcPts source points
+     * @param dstPts destination points
+     * @return transformed points
+     */
+    public int[] pts2units(float[] srcPts, float[] dstPts) {
+        return transformPoints(srcPts, dstPts, false);
+    }
+
+    /**
+     * Converts millipoints to units
+     *
+     * @param srcPts source points
+     * @return transformed points
+     */
+    public int[] mpts2units(float[] srcPts) {
+        return transformPoints(srcPts, null, true);
+    }
+
+    /**
+     * Converts points to units
+     *
+     * @param srcPts source points
+     * @return transformed points
+     */
+    public int[] pts2units(float[] srcPts) {
+        return transformPoints(srcPts, null, false);
+    }
+
+    /**
+     * Converts point to unit
+     *
+     * @param pt point
+     * @return transformed point
+     */
+    public float pt2units(float pt) {
+        return pt / ((float)AFPConstants.DPI_72 / state.getResolution());
+    }
+
+    /**
+     * Converts millipoint to unit
+     *
+     * @param mpt millipoint
+     * @return transformed point
+     */
+    public float mpt2units(float mpt) {
+        return mpt / ((float)AFPConstants.DPI_72_MPTS / state.getResolution());
+    }
+
+    private int[] transformPoints(float[] srcPts, float[] dstPts, boolean milli) {
+        if (dstPts == null) {
+            dstPts = new float[srcPts.length];
+        }
+        AffineTransform at = state.getData().getTransform();
+        at.transform(srcPts, 0, dstPts, 0, srcPts.length / 2);
+        int[] coords = new int[srcPts.length];
+        for (int i = 0; i < srcPts.length; i++) {
+            if (!milli) {
+                dstPts[i] *= 1000;
+            }
+            coords[i] = Math.round(dstPts[i]);
+        }
+        return coords;
+    }
+
+}