diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/codec/PngImage.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/codec/PngImage.java | 987 |
1 files changed, 0 insertions, 987 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/codec/PngImage.java b/src/main/java/com/lowagie/text/pdf/codec/PngImage.java deleted file mode 100644 index b82e17b..0000000 --- a/src/main/java/com/lowagie/text/pdf/codec/PngImage.java +++ /dev/null @@ -1,987 +0,0 @@ -/*
- * Copyright 2003 by Paulo Soares.
- *
- * The contents of this file are subject to the Mozilla Public License Version 1.1
- * (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.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the License.
- *
- * The Original Code is 'iText, a free JAVA-PDF library'.
- *
- * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
- * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
- * All Rights Reserved.
- * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
- * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
- *
- * Contributor(s): all the names of the contributors are added in the source code
- * where applicable.
- *
- * Alternatively, the contents of this file may be used under the terms of the
- * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
- * provisions of LGPL are applicable instead of those above. If you wish to
- * allow use of your version of this file only under the terms of the LGPL
- * License and not to allow others to use your version of this file under
- * the MPL, indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by the LGPL.
- * If you do not delete the provisions above, a recipient may use your version
- * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the MPL as stated above or under the terms of the GNU
- * Library General Public License as published by the Free Software Foundation;
- * either version 2 of the License, or any later version.
- *
- * This library 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 Library general Public License for more
- * details.
- *
- * If you didn't download this code from the following link, you should check if
- * you aren't using an obsolete version:
- * http://www.lowagie.com/iText/
- *
- *
- * The original JAI codecs have the following license
- *
- * Copyright (c) 2001 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * -Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * -Redistribution in binary form must reproduct the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
- * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
- * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
- * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
- * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
- * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
- * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
- * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
- * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that Software is not designed,licensed or intended for use in
- * the design, construction, operation or maintenance of any nuclear facility.
- */
-
-package com.lowagie.text.pdf.codec;
-
-import java.awt.color.ICC_Profile;
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.DataInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.URL;
-import java.util.zip.Inflater;
-import java.util.zip.InflaterInputStream;
-
-import com.lowagie.text.ExceptionConverter;
-import com.lowagie.text.Image;
-import com.lowagie.text.ImgRaw;
-import com.lowagie.text.pdf.ByteBuffer;
-import com.lowagie.text.pdf.PdfArray;
-import com.lowagie.text.pdf.PdfDictionary;
-import com.lowagie.text.pdf.PdfLiteral;
-import com.lowagie.text.pdf.PdfName;
-import com.lowagie.text.pdf.PdfNumber;
-import com.lowagie.text.pdf.PdfObject;
-import com.lowagie.text.pdf.PdfReader;
-import com.lowagie.text.pdf.PdfString;
-
-/** Reads a PNG image. All types of PNG can be read.
- * <p>
- * It is based in part in the JAI codec.
- *
- * @author Paulo Soares (psoares@consiste.pt)
- */
-public class PngImage {
-/** Some PNG specific values. */
- public static final int[] PNGID = {137, 80, 78, 71, 13, 10, 26, 10};
-
-/** A PNG marker. */
- public static final String IHDR = "IHDR";
-
-/** A PNG marker. */
- public static final String PLTE = "PLTE";
-
-/** A PNG marker. */
- public static final String IDAT = "IDAT";
-
-/** A PNG marker. */
- public static final String IEND = "IEND";
-
-/** A PNG marker. */
- public static final String tRNS = "tRNS";
-
-/** A PNG marker. */
- public static final String pHYs = "pHYs";
-
-/** A PNG marker. */
- public static final String gAMA = "gAMA";
-
-/** A PNG marker. */
- public static final String cHRM = "cHRM";
-
-/** A PNG marker. */
- public static final String sRGB = "sRGB";
-
-/** A PNG marker. */
- public static final String iCCP = "iCCP";
-
- private static final int TRANSFERSIZE = 4096;
- private static final int PNG_FILTER_NONE = 0;
- private static final int PNG_FILTER_SUB = 1;
- private static final int PNG_FILTER_UP = 2;
- private static final int PNG_FILTER_AVERAGE = 3;
- private static final int PNG_FILTER_PAETH = 4;
- private static final PdfName intents[] = {PdfName.PERCEPTUAL,
- PdfName.RELATIVECALORIMETRIC,PdfName.SATURATION,PdfName.ABSOLUTECALORIMETRIC};
-
- InputStream is;
- DataInputStream dataStream;
- int width;
- int height;
- int bitDepth;
- int colorType;
- int compressionMethod;
- int filterMethod;
- int interlaceMethod;
- PdfDictionary additional = new PdfDictionary();
- byte image[];
- byte smask[];
- byte trans[];
- NewByteArrayOutputStream idat = new NewByteArrayOutputStream();
- int dpiX;
- int dpiY;
- float XYRatio;
- boolean genBWMask;
- boolean palShades;
- int transRedGray = -1;
- int transGreen = -1;
- int transBlue = -1;
- int inputBands;
- int bytesPerPixel; // number of bytes per input pixel
- byte colorTable[];
- float gamma = 1f;
- boolean hasCHRM = false;
- float xW, yW, xR, yR, xG, yG, xB, yB;
- PdfName intent;
- ICC_Profile icc_profile;
-
-
-
- /** Creates a new instance of PngImage */
- PngImage(InputStream is) {
- this.is = is;
- }
-
- /** Reads a PNG from an url.
- * @param url the url
- * @throws IOException on error
- * @return the image
- */
- public static Image getImage(URL url) throws IOException {
- InputStream is = null;
- try {
- is = url.openStream();
- Image img = getImage(is);
- img.setUrl(url);
- return img;
- }
- finally {
- if (is != null) {
- is.close();
- }
- }
- }
-
- /** Reads a PNG from a stream.
- * @param is the stream
- * @throws IOException on error
- * @return the image
- */
- public static Image getImage(InputStream is) throws IOException {
- PngImage png = new PngImage(is);
- return png.getImage();
- }
-
- /** Reads a PNG from a file.
- * @param file the file
- * @throws IOException on error
- * @return the image
- */
- public static Image getImage(String file) throws IOException {
- return getImage(Image.toURL(file));
- }
-
- /** Reads a PNG from a byte array.
- * @param data the byte array
- * @throws IOException on error
- * @return the image
- */
- public static Image getImage(byte data[]) throws IOException {
- InputStream is = null;
- try {
- is = new ByteArrayInputStream(data);
- Image img = getImage(is);
- img.setOriginalData(data);
- return img;
- }
- finally {
- if (is != null) {
- is.close();
- }
- }
- }
-
- boolean checkMarker(String s) {
- if (s.length() != 4)
- return false;
- for (int k = 0; k < 4; ++k) {
- char c = s.charAt(k);
- if ((c < 'a' || c > 'z') && (c < 'A' || c > 'Z'))
- return false;
- }
- return true;
- }
-
- void readPng() throws IOException {
- for (int i = 0; i < PNGID.length; i++) {
- if (PNGID[i] != is.read()) {
- throw new IOException("File is not a valid PNG.");
- }
- }
- byte buffer[] = new byte[TRANSFERSIZE];
- while (true) {
- int len = getInt(is);
- String marker = getString(is);
- if (len < 0 || !checkMarker(marker))
- throw new IOException("Corrupted PNG file.");
- if (IDAT.equals(marker)) {
- int size;
- while (len != 0) {
- size = is.read(buffer, 0, Math.min(len, TRANSFERSIZE));
- if (size < 0)
- return;
- idat.write(buffer, 0, size);
- len -= size;
- }
- }
- else if (tRNS.equals(marker)) {
- switch (colorType) {
- case 0:
- if (len >= 2) {
- len -= 2;
- int gray = getWord(is);
- if (bitDepth == 16)
- transRedGray = gray;
- else
- additional.put(PdfName.MASK, new PdfLiteral("["+gray+" "+gray+"]"));
- }
- break;
- case 2:
- if (len >= 6) {
- len -= 6;
- int red = getWord(is);
- int green = getWord(is);
- int blue = getWord(is);
- if (bitDepth == 16) {
- transRedGray = red;
- transGreen = green;
- transBlue = blue;
- }
- else
- additional.put(PdfName.MASK, new PdfLiteral("["+red+" "+red+" "+green+" "+green+" "+blue+" "+blue+"]"));
- }
- break;
- case 3:
- if (len > 0) {
- trans = new byte[len];
- for (int k = 0; k < len; ++k)
- trans[k] = (byte)is.read();
- len = 0;
- }
- break;
- }
- Image.skip(is, len);
- }
- else if (IHDR.equals(marker)) {
- width = getInt(is);
- height = getInt(is);
-
- bitDepth = is.read();
- colorType = is.read();
- compressionMethod = is.read();
- filterMethod = is.read();
- interlaceMethod = is.read();
- }
- else if (PLTE.equals(marker)) {
- if (colorType == 3) {
- PdfArray colorspace = new PdfArray();
- colorspace.add(PdfName.INDEXED);
- colorspace.add(getColorspace());
- colorspace.add(new PdfNumber(len / 3 - 1));
- ByteBuffer colortable = new ByteBuffer();
- while ((len--) > 0) {
- colortable.append_i(is.read());
- }
- colorspace.add(new PdfString(colorTable = colortable.toByteArray()));
- additional.put(PdfName.COLORSPACE, colorspace);
- }
- else {
- Image.skip(is, len);
- }
- }
- else if (pHYs.equals(marker)) {
- int dx = getInt(is);
- int dy = getInt(is);
- int unit = is.read();
- if (unit == 1) {
- dpiX = (int)((float)dx * 0.0254f);
- dpiY = (int)((float)dy * 0.0254f);
- }
- else {
- if (dy != 0)
- XYRatio = (float)dx / (float)dy;
- }
- }
- else if (cHRM.equals(marker)) {
- xW = (float)getInt(is) / 100000f;
- yW = (float)getInt(is) / 100000f;
- xR = (float)getInt(is) / 100000f;
- yR = (float)getInt(is) / 100000f;
- xG = (float)getInt(is) / 100000f;
- yG = (float)getInt(is) / 100000f;
- xB = (float)getInt(is) / 100000f;
- yB = (float)getInt(is) / 100000f;
- hasCHRM = !(Math.abs(xW)<0.0001f||Math.abs(yW)<0.0001f||Math.abs(xR)<0.0001f||Math.abs(yR)<0.0001f||Math.abs(xG)<0.0001f||Math.abs(yG)<0.0001f||Math.abs(xB)<0.0001f||Math.abs(yB)<0.0001f);
- }
- else if (sRGB.equals(marker)) {
- int ri = is.read();
- intent = intents[ri];
- gamma = 2.2f;
- xW = 0.3127f;
- yW = 0.329f;
- xR = 0.64f;
- yR = 0.33f;
- xG = 0.3f;
- yG = 0.6f;
- xB = 0.15f;
- yB = 0.06f;
- hasCHRM = true;
- }
- else if (gAMA.equals(marker)) {
- int gm = getInt(is);
- if (gm != 0) {
- gamma = 100000f / (float)gm;
- if (!hasCHRM) {
- xW = 0.3127f;
- yW = 0.329f;
- xR = 0.64f;
- yR = 0.33f;
- xG = 0.3f;
- yG = 0.6f;
- xB = 0.15f;
- yB = 0.06f;
- hasCHRM = true;
- }
- }
- }
- else if (iCCP.equals(marker)) {
- do {
- --len;
- } while (is.read() != 0);
- is.read();
- --len;
- byte icccom[] = new byte[len];
- int p = 0;
- while (len > 0) {
- int r = is.read(icccom, p, len);
- if (r < 0)
- throw new IOException("Premature end of file.");
- p += r;
- len -= r;
- }
- byte iccp[] = PdfReader.FlateDecode(icccom, true);
- icccom = null;
- try {
- icc_profile = ICC_Profile.getInstance(iccp);
- }
- catch (Exception e) {
- icc_profile = null;
- }
- }
- else if (IEND.equals(marker)) {
- break;
- }
- else {
- Image.skip(is, len);
- }
- Image.skip(is, 4);
- }
- }
-
- PdfObject getColorspace() {
- if (icc_profile != null) {
- if ((colorType & 2) == 0)
- return PdfName.DEVICEGRAY;
- else
- return PdfName.DEVICERGB;
- }
- if (gamma == 1f && !hasCHRM) {
- if ((colorType & 2) == 0)
- return PdfName.DEVICEGRAY;
- else
- return PdfName.DEVICERGB;
- }
- else {
- PdfArray array = new PdfArray();
- PdfDictionary dic = new PdfDictionary();
- if ((colorType & 2) == 0) {
- if (gamma == 1f)
- return PdfName.DEVICEGRAY;
- array.add(PdfName.CALGRAY);
- dic.put(PdfName.GAMMA, new PdfNumber(gamma));
- dic.put(PdfName.WHITEPOINT, new PdfLiteral("[1 1 1]"));
- array.add(dic);
- }
- else {
- PdfObject wp = new PdfLiteral("[1 1 1]");
- array.add(PdfName.CALRGB);
- if (gamma != 1f) {
- PdfArray gm = new PdfArray();
- PdfNumber n = new PdfNumber(gamma);
- gm.add(n);
- gm.add(n);
- gm.add(n);
- dic.put(PdfName.GAMMA, gm);
- }
- if (hasCHRM) {
- float z = yW*((xG-xB)*yR-(xR-xB)*yG+(xR-xG)*yB);
- float YA = yR*((xG-xB)*yW-(xW-xB)*yG+(xW-xG)*yB)/z;
- float XA = YA*xR/yR;
- float ZA = YA*((1-xR)/yR-1);
- float YB = -yG*((xR-xB)*yW-(xW-xB)*yR+(xW-xR)*yB)/z;
- float XB = YB*xG/yG;
- float ZB = YB*((1-xG)/yG-1);
- float YC = yB*((xR-xG)*yW-(xW-xG)*yW+(xW-xR)*yG)/z;
- float XC = YC*xB/yB;
- float ZC = YC*((1-xB)/yB-1);
- float XW = XA+XB+XC;
- float YW = 1;//YA+YB+YC;
- float ZW = ZA+ZB+ZC;
- PdfArray wpa = new PdfArray();
- wpa.add(new PdfNumber(XW));
- wpa.add(new PdfNumber(YW));
- wpa.add(new PdfNumber(ZW));
- wp = wpa;
- PdfArray matrix = new PdfArray();
- matrix.add(new PdfNumber(XA));
- matrix.add(new PdfNumber(YA));
- matrix.add(new PdfNumber(ZA));
- matrix.add(new PdfNumber(XB));
- matrix.add(new PdfNumber(YB));
- matrix.add(new PdfNumber(ZB));
- matrix.add(new PdfNumber(XC));
- matrix.add(new PdfNumber(YC));
- matrix.add(new PdfNumber(ZC));
- dic.put(PdfName.MATRIX, matrix);
- }
- dic.put(PdfName.WHITEPOINT, wp);
- array.add(dic);
- }
- return array;
- }
- }
-
- Image getImage() throws IOException {
- readPng();
- try {
- int pal0 = 0;
- int palIdx = 0;
- palShades = false;
- if (trans != null) {
- for (int k = 0; k < trans.length; ++k) {
- int n = trans[k] & 0xff;
- if (n == 0) {
- ++pal0;
- palIdx = k;
- }
- if (n != 0 && n != 255) {
- palShades = true;
- break;
- }
- }
- }
- if ((colorType & 4) != 0)
- palShades = true;
- genBWMask = (!palShades && (pal0 > 1 || transRedGray >= 0));
- if (!palShades && !genBWMask && pal0 == 1) {
- additional.put(PdfName.MASK, new PdfLiteral("["+palIdx+" "+palIdx+"]"));
- }
- boolean needDecode = (interlaceMethod == 1) || (bitDepth == 16) || ((colorType & 4) != 0) || palShades || genBWMask;
- switch (colorType) {
- case 0:
- inputBands = 1;
- break;
- case 2:
- inputBands = 3;
- break;
- case 3:
- inputBands = 1;
- break;
- case 4:
- inputBands = 2;
- break;
- case 6:
- inputBands = 4;
- break;
- }
- if (needDecode)
- decodeIdat();
- int components = inputBands;
- if ((colorType & 4) != 0)
- --components;
- int bpc = bitDepth;
- if (bpc == 16)
- bpc = 8;
- Image img;
- if (image != null)
- img = Image.getInstance(width, height, components, bpc, image);
- else {
- img = new ImgRaw(width, height, components, bpc, idat.toByteArray());
- img.setDeflated(true);
- PdfDictionary decodeparms = new PdfDictionary();
- decodeparms.put(PdfName.BITSPERCOMPONENT, new PdfNumber(bitDepth));
- decodeparms.put(PdfName.PREDICTOR, new PdfNumber(15));
- decodeparms.put(PdfName.COLUMNS, new PdfNumber(width));
- decodeparms.put(PdfName.COLORS, new PdfNumber((colorType == 3 || (colorType & 2) == 0) ? 1 : 3));
- additional.put(PdfName.DECODEPARMS, decodeparms);
- }
- if (additional.get(PdfName.COLORSPACE) == null)
- additional.put(PdfName.COLORSPACE, getColorspace());
- if (intent != null)
- additional.put(PdfName.INTENT, intent);
- if (additional.size() > 0)
- img.setAdditional(additional);
- if (icc_profile != null)
- img.tagICC(icc_profile);
- if (palShades) {
- Image im2 = Image.getInstance(width, height, 1, 8, smask);
- im2.makeMask();
- img.setImageMask(im2);
- }
- if (genBWMask) {
- Image im2 = Image.getInstance(width, height, 1, 1, smask);
- im2.makeMask();
- img.setImageMask(im2);
- }
- img.setDpi(dpiX, dpiY);
- img.setXYRatio(XYRatio);
- img.setOriginalType(Image.ORIGINAL_PNG);
- return img;
- }
- catch (Exception e) {
- throw new ExceptionConverter(e);
- }
- }
-
- void decodeIdat() {
- int nbitDepth = bitDepth;
- if (nbitDepth == 16)
- nbitDepth = 8;
- int size = -1;
- bytesPerPixel = (bitDepth == 16) ? 2 : 1;
- switch (colorType) {
- case 0:
- size = (nbitDepth * width + 7) / 8 * height;
- break;
- case 2:
- size = width * 3 * height;
- bytesPerPixel *= 3;
- break;
- case 3:
- if (interlaceMethod == 1)
- size = (nbitDepth * width + 7) / 8 * height;
- bytesPerPixel = 1;
- break;
- case 4:
- size = width * height;
- bytesPerPixel *= 2;
- break;
- case 6:
- size = width * 3 * height;
- bytesPerPixel *= 4;
- break;
- }
- if (size >= 0)
- image = new byte[size];
- if (palShades)
- smask = new byte[width * height];
- else if (genBWMask)
- smask = new byte[(width + 7) / 8 * height];
- ByteArrayInputStream bai = new ByteArrayInputStream(idat.getBuf(), 0, idat.size());
- InputStream infStream = new InflaterInputStream(bai, new Inflater());
- dataStream = new DataInputStream(infStream);
-
- if (interlaceMethod != 1) {
- decodePass(0, 0, 1, 1, width, height);
- }
- else {
- decodePass(0, 0, 8, 8, (width + 7)/8, (height + 7)/8);
- decodePass(4, 0, 8, 8, (width + 3)/8, (height + 7)/8);
- decodePass(0, 4, 4, 8, (width + 3)/4, (height + 3)/8);
- decodePass(2, 0, 4, 4, (width + 1)/4, (height + 3)/4);
- decodePass(0, 2, 2, 4, (width + 1)/2, (height + 1)/4);
- decodePass(1, 0, 2, 2, width/2, (height + 1)/2);
- decodePass(0, 1, 1, 2, width, height/2);
- }
-
- }
-
- void decodePass( int xOffset, int yOffset,
- int xStep, int yStep,
- int passWidth, int passHeight) {
- if ((passWidth == 0) || (passHeight == 0)) {
- return;
- }
-
- int bytesPerRow = (inputBands*passWidth*bitDepth + 7)/8;
- byte[] curr = new byte[bytesPerRow];
- byte[] prior = new byte[bytesPerRow];
-
- // Decode the (sub)image row-by-row
- int srcY, dstY;
- for (srcY = 0, dstY = yOffset;
- srcY < passHeight;
- srcY++, dstY += yStep) {
- // Read the filter type byte and a row of data
- int filter = 0;
- try {
- filter = dataStream.read();
- dataStream.readFully(curr, 0, bytesPerRow);
- } catch (Exception e) {
- // empty on purpose
- }
-
- switch (filter) {
- case PNG_FILTER_NONE:
- break;
- case PNG_FILTER_SUB:
- decodeSubFilter(curr, bytesPerRow, bytesPerPixel);
- break;
- case PNG_FILTER_UP:
- decodeUpFilter(curr, prior, bytesPerRow);
- break;
- case PNG_FILTER_AVERAGE:
- decodeAverageFilter(curr, prior, bytesPerRow, bytesPerPixel);
- break;
- case PNG_FILTER_PAETH:
- decodePaethFilter(curr, prior, bytesPerRow, bytesPerPixel);
- break;
- default:
- // Error -- uknown filter type
- throw new RuntimeException("PNG filter unknown.");
- }
-
- processPixels(curr, xOffset, xStep, dstY, passWidth);
-
- // Swap curr and prior
- byte[] tmp = prior;
- prior = curr;
- curr = tmp;
- }
- }
-
- void processPixels(byte curr[], int xOffset, int step, int y, int width) {
- int srcX, dstX;
-
- int out[] = getPixel(curr);
- int sizes = 0;
- switch (colorType) {
- case 0:
- case 3:
- case 4:
- sizes = 1;
- break;
- case 2:
- case 6:
- sizes = 3;
- break;
- }
- if (image != null) {
- dstX = xOffset;
- int yStride = (sizes*this.width*(bitDepth == 16 ? 8 : bitDepth)+ 7)/8;
- for (srcX = 0; srcX < width; srcX++) {
- setPixel(image, out, inputBands * srcX, sizes, dstX, y, bitDepth, yStride);
- dstX += step;
- }
- }
- if (palShades) {
- if ((colorType & 4) != 0) {
- if (bitDepth == 16) {
- for (int k = 0; k < width; ++k)
- out[k * inputBands + sizes] >>>= 8;
- }
- int yStride = this.width;
- dstX = xOffset;
- for (srcX = 0; srcX < width; srcX++) {
- setPixel(smask, out, inputBands * srcX + sizes, 1, dstX, y, 8, yStride);
- dstX += step;
- }
- }
- else { //colorType 3
- int yStride = this.width;
- int v[] = new int[1];
- dstX = xOffset;
- for (srcX = 0; srcX < width; srcX++) {
- int idx = out[srcX];
- if (idx < trans.length)
- v[0] = trans[idx];
- setPixel(smask, v, 0, 1, dstX, y, 8, yStride);
- dstX += step;
- }
- }
- }
- else if (genBWMask) {
- switch (colorType) {
- case 3: {
- int yStride = (this.width + 7) / 8;
- int v[] = new int[1];
- dstX = xOffset;
- for (srcX = 0; srcX < width; srcX++) {
- int idx = out[srcX];
- if (idx < trans.length)
- v[0] = (trans[idx] == 0 ? 1 : 0);
- setPixel(smask, v, 0, 1, dstX, y, 1, yStride);
- dstX += step;
- }
- break;
- }
- case 0: {
- int yStride = (this.width + 7) / 8;
- int v[] = new int[1];
- dstX = xOffset;
- for (srcX = 0; srcX < width; srcX++) {
- int g = out[srcX];
- v[0] = (g == transRedGray ? 1 : 0);
- setPixel(smask, v, 0, 1, dstX, y, 1, yStride);
- dstX += step;
- }
- break;
- }
- case 2: {
- int yStride = (this.width + 7) / 8;
- int v[] = new int[1];
- dstX = xOffset;
- for (srcX = 0; srcX < width; srcX++) {
- int markRed = inputBands * srcX;
- v[0] = (out[markRed] == transRedGray && out[markRed + 1] == transGreen
- && out[markRed + 2] == transBlue ? 1 : 0);
- setPixel(smask, v, 0, 1, dstX, y, 1, yStride);
- dstX += step;
- }
- break;
- }
- }
- }
- }
-
- static int getPixel(byte image[], int x, int y, int bitDepth, int bytesPerRow) {
- if (bitDepth == 8) {
- int pos = bytesPerRow * y + x;
- return image[pos] & 0xff;
- }
- else {
- int pos = bytesPerRow * y + x / (8 / bitDepth);
- int v = image[pos] >> (8 - bitDepth * (x % (8 / bitDepth))- bitDepth);
- return v & ((1 << bitDepth) - 1);
- }
- }
-
- static void setPixel(byte image[], int data[], int offset, int size, int x, int y, int bitDepth, int bytesPerRow) {
- if (bitDepth == 8) {
- int pos = bytesPerRow * y + size * x;
- for (int k = 0; k < size; ++k)
- image[pos + k] = (byte)data[k + offset];
- }
- else if (bitDepth == 16) {
- int pos = bytesPerRow * y + size * x;
- for (int k = 0; k < size; ++k)
- image[pos + k] = (byte)(data[k + offset] >>> 8);
- }
- else {
- int pos = bytesPerRow * y + x / (8 / bitDepth);
- int v = data[offset] << (8 - bitDepth * (x % (8 / bitDepth))- bitDepth);
- image[pos] |= v;
- }
- }
-
- int[] getPixel(byte curr[]) {
- switch (bitDepth) {
- case 8: {
- int out[] = new int[curr.length];
- for (int k = 0; k < out.length; ++k)
- out[k] = curr[k] & 0xff;
- return out;
- }
- case 16: {
- int out[] = new int[curr.length / 2];
- for (int k = 0; k < out.length; ++k)
- out[k] = ((curr[k * 2] & 0xff) << 8) + (curr[k * 2 + 1] & 0xff);
- return out;
- }
- default: {
- int out[] = new int[curr.length * 8 / bitDepth];
- int idx = 0;
- int passes = 8 / bitDepth;
- int mask = (1 << bitDepth) - 1;
- for (int k = 0; k < curr.length; ++k) {
- for (int j = passes - 1; j >= 0; --j) {
- out[idx++] = (curr[k] >>> (bitDepth * j)) & mask;
- }
- }
- return out;
- }
- }
- }
-
- private static void decodeSubFilter(byte[] curr, int count, int bpp) {
- for (int i = bpp; i < count; i++) {
- int val;
-
- val = curr[i] & 0xff;
- val += curr[i - bpp] & 0xff;
-
- curr[i] = (byte)val;
- }
- }
-
- private static void decodeUpFilter(byte[] curr, byte[] prev,
- int count) {
- for (int i = 0; i < count; i++) {
- int raw = curr[i] & 0xff;
- int prior = prev[i] & 0xff;
-
- curr[i] = (byte)(raw + prior);
- }
- }
-
- private static void decodeAverageFilter(byte[] curr, byte[] prev,
- int count, int bpp) {
- int raw, priorPixel, priorRow;
-
- for (int i = 0; i < bpp; i++) {
- raw = curr[i] & 0xff;
- priorRow = prev[i] & 0xff;
-
- curr[i] = (byte)(raw + priorRow/2);
- }
-
- for (int i = bpp; i < count; i++) {
- raw = curr[i] & 0xff;
- priorPixel = curr[i - bpp] & 0xff;
- priorRow = prev[i] & 0xff;
-
- curr[i] = (byte)(raw + (priorPixel + priorRow)/2);
- }
- }
-
- private static int paethPredictor(int a, int b, int c) {
- int p = a + b - c;
- int pa = Math.abs(p - a);
- int pb = Math.abs(p - b);
- int pc = Math.abs(p - c);
-
- if ((pa <= pb) && (pa <= pc)) {
- return a;
- } else if (pb <= pc) {
- return b;
- } else {
- return c;
- }
- }
-
- private static void decodePaethFilter(byte[] curr, byte[] prev,
- int count, int bpp) {
- int raw, priorPixel, priorRow, priorRowPixel;
-
- for (int i = 0; i < bpp; i++) {
- raw = curr[i] & 0xff;
- priorRow = prev[i] & 0xff;
-
- curr[i] = (byte)(raw + priorRow);
- }
-
- for (int i = bpp; i < count; i++) {
- raw = curr[i] & 0xff;
- priorPixel = curr[i - bpp] & 0xff;
- priorRow = prev[i] & 0xff;
- priorRowPixel = prev[i - bpp] & 0xff;
-
- curr[i] = (byte)(raw + paethPredictor(priorPixel,
- priorRow,
- priorRowPixel));
- }
- }
-
- static class NewByteArrayOutputStream extends ByteArrayOutputStream {
- public byte[] getBuf() {
- return buf;
- }
- }
-
-/**
- * Gets an <CODE>int</CODE> from an <CODE>InputStream</CODE>.
- *
- * @param is an <CODE>InputStream</CODE>
- * @return the value of an <CODE>int</CODE>
- */
-
- public static final int getInt(InputStream is) throws IOException {
- return (is.read() << 24) + (is.read() << 16) + (is.read() << 8) + is.read();
- }
-
-/**
- * Gets a <CODE>word</CODE> from an <CODE>InputStream</CODE>.
- *
- * @param is an <CODE>InputStream</CODE>
- * @return the value of an <CODE>int</CODE>
- */
-
- public static final int getWord(InputStream is) throws IOException {
- return (is.read() << 8) + is.read();
- }
-
-/**
- * Gets a <CODE>String</CODE> from an <CODE>InputStream</CODE>.
- *
- * @param is an <CODE>InputStream</CODE>
- * @return the value of an <CODE>int</CODE>
- */
-
- public static final String getString(InputStream is) throws IOException {
- StringBuffer buf = new StringBuffer();
- for (int i = 0; i < 4; i++) {
- buf.append((char)is.read());
- }
- return buf.toString();
- }
-
-}
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