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Diffstat (limited to 'awt/org/apache/harmony/awt/gl/image/PngDecoder.java')
-rw-r--r--awt/org/apache/harmony/awt/gl/image/PngDecoder.java270
1 files changed, 0 insertions, 270 deletions
diff --git a/awt/org/apache/harmony/awt/gl/image/PngDecoder.java b/awt/org/apache/harmony/awt/gl/image/PngDecoder.java
deleted file mode 100644
index 7e85600..0000000
--- a/awt/org/apache/harmony/awt/gl/image/PngDecoder.java
+++ /dev/null
@@ -1,270 +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 $Revision$
- *
- * @date: Jul 22, 2005
- */
-
-package org.apache.harmony.awt.gl.image;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.Hashtable;
-import java.awt.color.ColorSpace;
-import java.awt.image.*;
-import java.awt.*;
-
-import org.apache.harmony.awt.internal.nls.Messages;
-
-public class PngDecoder extends ImageDecoder {
- // initializes proper field IDs
- private static native void initIDs();
-
- static {
- System.loadLibrary("gl"); //$NON-NLS-1$
- initIDs();
- }
-
- private static final int hintflags =
- ImageConsumer.SINGLEFRAME | // PNG is a static image
- ImageConsumer.TOPDOWNLEFTRIGHT | // This order is only one possible
- ImageConsumer.COMPLETESCANLINES; // Don't deliver incomplete scanlines
-
- // Each pixel is a grayscale sample.
- private static final int PNG_COLOR_TYPE_GRAY = 0;
- // Each pixel is an R,G,B triple.
- private static final int PNG_COLOR_TYPE_RGB = 2;
- // Each pixel is a palette index, a PLTE chunk must appear.
- private static final int PNG_COLOR_TYPE_PLTE = 3;
- // Each pixel is a grayscale sample, followed by an alpha sample.
- private static final int PNG_COLOR_TYPE_GRAY_ALPHA = 4;
- // Each pixel is an R,G,B triple, followed by an alpha sample.
- private static final int PNG_COLOR_TYPE_RGBA = 6;
-
- private static final int INPUT_BUFFER_SIZE = 4096;
- private byte buffer[] = new byte[INPUT_BUFFER_SIZE];
-
- // Buffers for decoded image data
- byte byteOut[];
- int intOut[];
-
- // Native pointer to png decoder data
- private long hNativeDecoder;
-
- int imageWidth, imageHeight;
- int colorType;
- int bitDepth;
- byte cmap[];
-
- boolean transferInts; // Is transfer type int?.. or byte?
- int dataElementsPerPixel = 1;
-
- ColorModel cm;
-
- int updateFromScanline; // First scanline to update
- int numScanlines; // Number of scanlines to update
-
- private native long decode(byte[] input, int bytesInBuffer, long hDecoder);
-
- private static native void releaseNativeDecoder(long hDecoder);
-
- public PngDecoder(DecodingImageSource src, InputStream is) {
- super(src, is);
- }
-
- @Override
- public void decodeImage() throws IOException {
- try {
- int bytesRead = 0;
- int needBytes, offset, bytesInBuffer = 0;
- // Read from the input stream
- for (;;) {
- needBytes = INPUT_BUFFER_SIZE - bytesInBuffer;
- offset = bytesInBuffer;
-
- bytesRead = inputStream.read(buffer, offset, needBytes);
-
- if (bytesRead < 0) { // Break, nothing to read from buffer, image truncated?
- releaseNativeDecoder(hNativeDecoder);
- break;
- }
-
- // Keep track on how much bytes left in buffer
- bytesInBuffer += bytesRead;
- hNativeDecoder = decode(buffer, bytesInBuffer, hNativeDecoder);
- // PNG decoder always consumes all bytes at once
- bytesInBuffer = 0;
-
- // if (bytesConsumed < 0)
- //break; // Error exit
-
- returnData();
-
- // OK, we decoded all the picture in the right way...
- if (hNativeDecoder == 0) {
- break;
- }
- }
-
- imageComplete(ImageConsumer.STATICIMAGEDONE);
- } catch (IOException e) {
- throw e;
- } catch (RuntimeException e) {
- imageComplete(ImageConsumer.IMAGEERROR);
- throw e;
- } finally {
- closeStream();
- }
- }
-
- @SuppressWarnings("unused")
- private void returnHeader() { // Called from native code
- setDimensions(imageWidth, imageHeight);
-
- switch (colorType) {
- case PNG_COLOR_TYPE_GRAY: {
- if (bitDepth != 8 && bitDepth != 4 && bitDepth != 2 && bitDepth != 1) {
- // awt.3C=Unknown PNG color type
- throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$
- }
-
- // Create gray color model
- int numEntries = 1 << bitDepth;
- int scaleFactor = 255 / (numEntries-1);
- byte comps[] = new byte[numEntries];
- for (int i = 0; i < numEntries; i++) {
- comps[i] = (byte) (i * scaleFactor);
- }
- cm = new IndexColorModel(/*bitDepth*/8, numEntries, comps, comps, comps);
-
- transferInts = false;
- break;
- }
-
- case PNG_COLOR_TYPE_RGB: {
- if (bitDepth != 8) {
- // awt.3C=Unknown PNG color type
- throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$
- }
-
- cm = new DirectColorModel(24, 0xFF0000, 0xFF00, 0xFF);
-
- transferInts = true;
- break;
- }
-
- case PNG_COLOR_TYPE_PLTE: {
- if (bitDepth != 8 && bitDepth != 4 && bitDepth != 2 && bitDepth != 1) {
- // awt.3C=Unknown PNG color type
- throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$
- }
-
- cm = new IndexColorModel(/*bitDepth*/8, cmap.length / 3, cmap, 0, false);
-
- transferInts = false;
- break;
- }
-
- case PNG_COLOR_TYPE_GRAY_ALPHA: {
- if (bitDepth != 8) {
- // awt.3C=Unknown PNG color type
- throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$
- }
-
- cm = new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY),
- true, false,
- Transparency.TRANSLUCENT,
- DataBuffer.TYPE_BYTE);
-
- transferInts = false;
- dataElementsPerPixel = 2;
- break;
- }
-
- case PNG_COLOR_TYPE_RGBA: {
- if (bitDepth != 8) {
- // awt.3C=Unknown PNG color type
- throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$
- }
-
- cm = ColorModel.getRGBdefault();
-
- transferInts = true;
- break;
- }
- default:
- // awt.3C=Unknown PNG color type
- throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$
- }
-
- // Create output buffer
- if (transferInts) {
- intOut = new int[imageWidth * imageHeight];
- } else {
- byteOut = new byte[imageWidth * imageHeight * dataElementsPerPixel];
- }
-
- setColorModel(cm);
-
- setHints(hintflags);
- setProperties(new Hashtable<Object, Object>()); // Empty
- }
-
- // Send the data to the consumer
- private void returnData() {
- // Send 1 or more scanlines to the consumer.
- if (numScanlines > 0) {
- // Native decoder could have returned
- // some data from the next pass, handle it here
- int pass1, pass2;
- if (updateFromScanline + numScanlines > imageHeight) {
- pass1 = imageHeight - updateFromScanline;
- pass2 = updateFromScanline + numScanlines - imageHeight;
- } else {
- pass1 = numScanlines;
- pass2 = 0;
- }
-
- transfer(updateFromScanline, pass1);
- if (pass2 != 0) {
- transfer(0, pass2);
- }
- }
- }
-
- private void transfer(int updateFromScanline, int numScanlines) {
- if (transferInts) {
- setPixels(
- 0, updateFromScanline,
- imageWidth, numScanlines,
- cm, intOut,
- updateFromScanline * imageWidth,
- imageWidth
- );
- } else {
- setPixels(
- 0, updateFromScanline,
- imageWidth, numScanlines,
- cm, byteOut,
- updateFromScanline * imageWidth * dataElementsPerPixel,
- imageWidth * dataElementsPerPixel
- );
- }
- }
-}
generated by cgit v1.1 at 2024-05-23 09:19:47 +0000