auto import from //depot/cupcake/@135843

1 files changed, 481 insertions, 0 deletions

diff --git a/awt/java/awt/image/DataBuffer.java b/awt/java/awt/image/DataBuffer.java
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+/*
+ *  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.
+ */
+/**
+ * @author Igor V. Stolyarov
+ * @version $Revision$
+ */
+
+package java.awt.image;
+
+import org.apache.harmony.awt.gl.image.DataBufferListener;
+import org.apache.harmony.awt.internal.nls.Messages;
+
+/**
+ * The Class DataBuffer is a wrapper class for a data array to be used for the
+ * situation where a suite of functionality acts on a set of data in a
+ * consistent way even though the primitive type of the data may vary from one
+ * use to the next.
+ * 
+ * @since Android 1.0
+ */
+public abstract class DataBuffer {
+
+    /**
+     * The Constant TYPE_BYTE.
+     */
+    public static final int TYPE_BYTE = 0;
+
+    /**
+     * The Constant TYPE_USHORT.
+     */
+    public static final int TYPE_USHORT = 1;
+
+    /**
+     * The Constant TYPE_SHORT.
+     */
+    public static final int TYPE_SHORT = 2;
+
+    /**
+     * The Constant TYPE_INT.
+     */
+    public static final int TYPE_INT = 3;
+
+    /**
+     * The Constant TYPE_FLOAT.
+     */
+    public static final int TYPE_FLOAT = 4;
+
+    /**
+     * The Constant TYPE_DOUBLE.
+     */
+    public static final int TYPE_DOUBLE = 5;
+
+    /**
+     * The Constant TYPE_UNDEFINED.
+     */
+    public static final int TYPE_UNDEFINED = 32;
+
+    /**
+     * The data type indicates the primitive type of the data in this
+     * DataBuffer.
+     */
+    protected int dataType;
+
+    /**
+     * The number of data arrays in this DataBuffer.
+     */
+    protected int banks;
+
+    /**
+     * The starting index for reading the data from the first (or only) internal
+     * data array.
+     */
+    protected int offset;
+
+    /**
+     * The length (number of elements) of the data arrays.
+     */
+    protected int size;
+
+    /**
+     * The starting indices for reading the data from the internal data arrays.
+     */
+    protected int offsets[];
+
+    /**
+     * The data changed.
+     */
+    boolean dataChanged = true;
+
+    /**
+     * The data taken.
+     */
+    boolean dataTaken = false;
+
+    /**
+     * The listener.
+     */
+    DataBufferListener listener;
+
+    static {
+        AwtImageBackdoorAccessorImpl.init();
+    }
+
+    /**
+     * Instantiates a new data buffer.
+     * 
+     * @param dataType
+     *            the data type.
+     * @param size
+     *            the length (number of elements) of the data arrays.
+     * @param numBanks
+     *            the number of data arrays to create.
+     * @param offsets
+     *            the starting indices for reading the data from the internal
+     *            data arrays.
+     */
+    protected DataBuffer(int dataType, int size, int numBanks, int[] offsets) {
+        this.dataType = dataType;
+        this.size = size;
+        this.banks = numBanks;
+        this.offsets = offsets.clone();
+        this.offset = offsets[0];
+    }
+
+    /**
+     * Instantiates a new data buffer with all of the data arrays starting at
+     * the same index.
+     * 
+     * @param dataType
+     *            the data type.
+     * @param size
+     *            the length (number of elements) of the data arrays.
+     * @param numBanks
+     *            the number of data arrays to create.
+     * @param offset
+     *            the offset to use for all of the data arrays.
+     */
+    protected DataBuffer(int dataType, int size, int numBanks, int offset) {
+        this.dataType = dataType;
+        this.size = size;
+        this.banks = numBanks;
+        this.offset = offset;
+        this.offsets = new int[numBanks];
+        int i = 0;
+        while (i < numBanks) {
+            offsets[i++] = offset;
+        }
+    }
+
+    /**
+     * Instantiates a new data buffer with all of the data arrays read from the
+     * beginning (at offset zero).
+     * 
+     * @param dataType
+     *            the data type.
+     * @param size
+     *            the length (number of elements) of the data arrays.
+     * @param numBanks
+     *            the number of data arrays to create.
+     */
+    protected DataBuffer(int dataType, int size, int numBanks) {
+        this.dataType = dataType;
+        this.size = size;
+        this.banks = numBanks;
+        this.offset = 0;
+        this.offsets = new int[numBanks];
+    }
+
+    /**
+     * Instantiates a new data buffer with one internal data array read from the
+     * beginning (at offset zero).
+     * 
+     * @param dataType
+     *            the data type.
+     * @param size
+     *            the length (number of elements) of the data arrays.
+     */
+    protected DataBuffer(int dataType, int size) {
+        this.dataType = dataType;
+        this.size = size;
+        this.banks = 1;
+        this.offset = 0;
+        this.offsets = new int[1];
+    }
+
+    /**
+     * Sets the data value in the specified array at the specified index.
+     * 
+     * @param bank
+     *            the internal array to the data to.
+     * @param i
+     *            the index within the array where the data should be written.
+     * @param val
+     *            the value to write into the array.
+     */
+    public abstract void setElem(int bank, int i, int val);
+
+    /**
+     * Sets the float data value in the specified array at the specified index.
+     * 
+     * @param bank
+     *            the internal array to the data to.
+     * @param i
+     *            the index within the array where the data should be written.
+     * @param val
+     *            the value to write into the array.
+     */
+    public void setElemFloat(int bank, int i, float val) {
+        setElem(bank, i, (int)val);
+    }
+
+    /**
+     * Sets the double data value in the specified array at the specified index.
+     * 
+     * @param bank
+     *            the internal array to the data to.
+     * @param i
+     *            the index within the array where the data should be written.
+     * @param val
+     *            the value to write into the array.
+     */
+    public void setElemDouble(int bank, int i, double val) {
+        setElem(bank, i, (int)val);
+    }
+
+    /**
+     * Sets the data value in the first array at the specified index.
+     * 
+     * @param i
+     *            the index within the array where the data should be written.
+     * @param val
+     *            the value to write into the array.
+     */
+    public void setElem(int i, int val) {
+        setElem(0, i, val);
+    }
+
+    /**
+     * Gets the data value from the specified data array at the specified index.
+     * 
+     * @param bank
+     *            the data array to read from.
+     * @param i
+     *            the index within the array where the data should be read.
+     * @return the data element.
+     */
+    public abstract int getElem(int bank, int i);
+
+    /**
+     * Gets the float-type data value from the specified data array at the
+     * specified index.
+     * 
+     * @param bank
+     *            the data array to read from.
+     * @param i
+     *            the index within the array where the data should be read.
+     * @return the data element.
+     */
+    public float getElemFloat(int bank, int i) {
+        return getElem(bank, i);
+    }
+
+    /**
+     * Gets the double-type data value from the specified data array at the
+     * specified index.
+     * 
+     * @param bank
+     *            the data array to read from.
+     * @param i
+     *            the index within the array where the data should be read.
+     * @return the data element.
+     */
+    public double getElemDouble(int bank, int i) {
+        return getElem(bank, i);
+    }
+
+    /**
+     * Sets the float data value in the first array at the specified index.
+     * 
+     * @param i
+     *            the index within the array where the data should be written.
+     * @param val
+     *            the value to write into the array.
+     */
+    public void setElemFloat(int i, float val) {
+        setElemFloat(0, i, val);
+    }
+
+    /**
+     * Sets the double data value in the first array at the specified index.
+     * 
+     * @param i
+     *            the index within the array where the data should be written.
+     * @param val
+     *            the value to write into the array.
+     */
+    public void setElemDouble(int i, double val) {
+        setElemDouble(0, i, val);
+    }
+
+    /**
+     * Gets the data value from the first data array at the specified index and
+     * returns it as an integer.
+     * 
+     * @param i
+     *            the index within the array where the data should be read.
+     * @return the data element.
+     */
+    public int getElem(int i) {
+        return getElem(0, i);
+    }
+
+    /**
+     * Gets the data value from the first data array at the specified index and
+     * returns it as a float.
+     * 
+     * @param i
+     *            the index within the array where the data should be read.
+     * @return the data element.
+     */
+    public float getElemFloat(int i) {
+        return getElem(0, i);
+    }
+
+    /**
+     * Gets the data value from the first data array at the specified index and
+     * returns it as a double.
+     * 
+     * @param i
+     *            the index within the array where the data should be read.
+     * @return the data element.
+     */
+    public double getElemDouble(int i) {
+        return getElem(i);
+    }
+
+    /**
+     * Gets the array giving the offsets corresponding to the internal data
+     * arrays.
+     * 
+     * @return the array of offsets.
+     */
+    public int[] getOffsets() {
+        return offsets;
+    }
+
+    /**
+     * Gets the size in bits of the primitive data type.
+     * 
+     * @return the size in bits of the primitive data type.
+     */
+    public int getSize() {
+        return size;
+    }
+
+    /**
+     * Gets the offset corresponding to the first internal data array.
+     * 
+     * @return the offset.
+     */
+    public int getOffset() {
+        return offset;
+    }
+
+    /**
+     * Gets the number of data arrays in this DataBuffer.
+     * 
+     * @return the number of data arrays.
+     */
+    public int getNumBanks() {
+        return banks;
+    }
+
+    /**
+     * Gets the primitive type of this buffer's data.
+     * 
+     * @return the data type.
+     */
+    public int getDataType() {
+        return this.dataType;
+    }
+
+    /**
+     * Gets the size in bits of the primitive data type.
+     * 
+     * @param type
+     *            the primitive type.
+     * @return the size in bits of the primitive data type.
+     */
+    public static int getDataTypeSize(int type) {
+        switch (type) {
+
+            case TYPE_BYTE:
+                return 8;
+
+            case TYPE_USHORT:
+            case TYPE_SHORT:
+                return 16;
+
+            case TYPE_INT:
+            case TYPE_FLOAT:
+                return 32;
+
+            case TYPE_DOUBLE:
+                return 64;
+
+            default:
+                // awt.22C=Unknown data type {0}
+                throw new IllegalArgumentException(Messages.getString("awt.22C", type)); //$NON-NLS-1$
+        }
+    }
+
+    /**
+     * Notifies the listener that the data has changed.
+     */
+    void notifyChanged() {
+        if (listener != null && !dataChanged) {
+            dataChanged = true;
+            listener.dataChanged();
+        }
+    }
+
+    /**
+     * Notifies the listener that the data has been released.
+     */
+    void notifyTaken() {
+        if (listener != null && !dataTaken) {
+            dataTaken = true;
+            listener.dataTaken();
+        }
+    }
+
+    /**
+     * Release the data.
+     */
+    void releaseData() {
+        if (listener != null && dataTaken) {
+            dataTaken = false;
+            listener.dataReleased();
+        }
+    }
+
+    /**
+     * Adds the data buffer listener.
+     * 
+     * @param listener
+     *            the listener.
+     */
+    void addDataBufferListener(DataBufferListener listener) {
+        this.listener = listener;
+    }
+
+    /**
+     * Removes the data buffer listener.
+     */
+    void removeDataBufferListener() {
+        listener = null;
+    }
+
+    /**
+     * Validate.
+     */
+    void validate() {
+        dataChanged = false;
+    }
+
+}