diff options
Diffstat (limited to 'awt/org/apache/harmony/awt/gl/image/JpegDecoder.java')
| -rw-r--r-- | awt/org/apache/harmony/awt/gl/image/JpegDecoder.java | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/awt/org/apache/harmony/awt/gl/image/JpegDecoder.java b/awt/org/apache/harmony/awt/gl/image/JpegDecoder.java deleted file mode 100644 index 2e64427..0000000 --- a/awt/org/apache/harmony/awt/gl/image/JpegDecoder.java +++ /dev/null @@ -1,231 +0,0 @@ -/* -* 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 Oleg V. Khaschansky - * @version $Revision$ - */ -package org.apache.harmony.awt.gl.image; - -import java.awt.image.*; -import java.awt.color.ColorSpace; -import java.awt.*; -import java.io.IOException; -import java.io.InputStream; -import java.util.Hashtable; - -import org.apache.harmony.awt.internal.nls.Messages; - -public class JpegDecoder extends ImageDecoder { - // Only 2 output colorspaces expected. Others are converted into - // these ones. - // 1. Grayscale - public static final int JCS_GRAYSCALE = 1; - // 2. RGB - public static final int JCS_RGB = 2; - - // Flags for the consumer, progressive JPEG - private static final int hintflagsProgressive = - ImageConsumer.SINGLEFRAME | // JPEG is a static image - ImageConsumer.TOPDOWNLEFTRIGHT | // This order is only one possible - ImageConsumer.COMPLETESCANLINES; // Don't deliver incomplete scanlines - // Flags for the consumer, singlepass JPEG - private static final int hintflagsSingle = - ImageConsumer.SINGLEPASS | - hintflagsProgressive; - - // Buffer for the stream - private static final int BUFFER_SIZE = 1024; - private byte buffer[] = new byte[BUFFER_SIZE]; - - // 3 possible color models only - private static ColorModel cmRGB; - private static ColorModel cmGray; - - // initializes proper field IDs - private static native void initIDs(); - - // Pointer to native structure which store decoding state - // between subsequent decoding/IO-suspension cycles - private long hNativeDecoder = 0; // NULL initially - - private boolean headerDone = false; - - // Next 4 members are filled by the native method (decompress). - // We can simply check if imageWidth is still negative to find - // out if they are already filled. - private int imageWidth = -1; - private int imageHeight = -1; - private boolean progressive = false; - private int jpegColorSpace = 0; - - // Stores number of bytes consumed by the native decoder - private int bytesConsumed = 0; - // Stores current scanline returned by the decoder - private int currScanline = 0; - - private ColorModel cm = null; - - static { - System.loadLibrary("jpegdecoder"); //$NON-NLS-1$ - - cmGray = new ComponentColorModel( - ColorSpace.getInstance(ColorSpace.CS_GRAY), - false, false, - Transparency.OPAQUE, DataBuffer.TYPE_BYTE - ); - - // Create RGB color model - cmRGB = new DirectColorModel(24, 0xFF0000, 0xFF00, 0xFF); - - initIDs(); - } - - public JpegDecoder(DecodingImageSource src, InputStream is) { - super(src, is); - } - - /* - public JpegDecoder(InputStream iStream, ImageConsumer iConsumer) { - inputStream = iStream; - consumer = iConsumer; - } - */ - - /** - * @return - not NULL if call is successful - */ - private native Object decode( - byte[] input, - int bytesInBuffer, - long hDecoder); - - private static native void releaseNativeDecoder(long hDecoder); - - @Override - public void decodeImage() throws IOException { - try { - int bytesRead = 0, dataLength = 0; - boolean eosReached = false; - int needBytes, offset, bytesInBuffer = 0; - byte byteOut[] = null; - int intOut[] = null; - // Read from the input stream - for (;;) { - needBytes = BUFFER_SIZE - bytesInBuffer; - offset = bytesInBuffer; - - bytesRead = inputStream.read(buffer, offset, needBytes); - - if (bytesRead < 0) { - bytesRead = 0;//break; - eosReached = true; - } // Don't break, maybe something left in buffer - - // Keep track on how much bytes left in buffer - bytesInBuffer += bytesRead; - - // Here we pass overall number of bytes left in the java buffer - // (bytesInBuffer) since jpeg decoder has its own buffer and consumes - // as many bytes as it can. If there are any unconsumed bytes - // it didn't add them to its buffer... - Object arr = decode( - buffer, - bytesInBuffer, - hNativeDecoder); - - // Keep track on how much bytes left in buffer - bytesInBuffer -= bytesConsumed; - - if (!headerDone && imageWidth != -1) { - returnHeader(); - headerDone = true; - } - - if (bytesConsumed < 0) { - break; // Error exit - } - - if (arr instanceof byte[]) { - byteOut = (byte[]) arr; - dataLength = byteOut.length; - returnData(byteOut, currScanline); - } else if (arr instanceof int[]) { - intOut = (int[]) arr; - dataLength = intOut.length; - returnData(intOut, currScanline); - } else { - dataLength = 0; - } - - if (hNativeDecoder == 0) { - break; - } - - if (dataLength == 0 && eosReached) { - releaseNativeDecoder(hNativeDecoder); - break; // Probably image is truncated - } - } - imageComplete(ImageConsumer.STATICIMAGEDONE); - } catch (IOException e) { - throw e; - } finally { - closeStream(); - } - } - - public void returnHeader() { - setDimensions(imageWidth, imageHeight); - - switch (jpegColorSpace) { - case JCS_GRAYSCALE: cm = cmGray; break; - case JCS_RGB: cm = cmRGB; break; - default: - // awt.3D=Unknown colorspace - throw new IllegalArgumentException(Messages.getString("awt.3D")); //$NON-NLS-1$ - } - setColorModel(cm); - - setHints(progressive ? hintflagsProgressive : hintflagsSingle); - - setProperties(new Hashtable<Object, Object>()); // Empty - } - - // Send the data to the consumer - public void returnData(int data[], int currScanLine) { - // Send 1 or more scanlines to the consumer. - int numScanlines = data.length / imageWidth; - if (numScanlines > 0) { - setPixels( - 0, currScanLine - numScanlines, - imageWidth, numScanlines, - cm, data, 0, imageWidth - ); - } - } - - public void returnData(byte data[], int currScanLine) { - int numScanlines = data.length / imageWidth; - if (numScanlines > 0) { - setPixels( - 0, currScanLine - numScanlines, - imageWidth, numScanlines, - cm, data, 0, imageWidth - ); - } - } -} |