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A PHP engine implemented in 100% Java
/*
* Copyright (c) 1998-2012 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.quercus.lib.pdf;
import com.caucho.util.L10N;
import com.caucho.vfs.Path;
import com.caucho.vfs.ReadStream;
import com.caucho.vfs.TempBuffer;
import com.caucho.vfs.TempStream;
import com.caucho.vfs.Vfs;
import com.caucho.vfs.WriteStream;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
/**
* deals with an image
*/
public class PDFImage extends PDFObject {
private static final Logger log
= Logger.getLogger(PDFImage.class.getName());
private static final L10N L = new L10N(PDFImage.class);
private Path _path;
private ReadStream _is;
private BufferedImage _image;
private int _id;
private String _type;
private int _width;
private int _height;
private int _bits;
private TempBuffer _jpegHead;
public PDFImage(Path path)
throws IOException
{
_path = path;
_is = path.openRead();
try {
parseImage();
} finally {
_is.close();
}
}
/**
* Returns the object id.
*/
public int getId()
{
return _id;
}
/**
* Sets the object id.
*/
public void setId(int id)
{
_id = id;
}
public double get_width()
{
return _width;
}
public double get_height()
{
return _height;
}
private boolean parseImage()
throws IOException
{
_image = ImageIO.read(_is);
_width = _image.getWidth();
_height = _image.getHeight();
TempStream ts = new TempStream();
WriteStream os = new WriteStream(ts);
try {
ImageIO.write(_image, "jpeg", os);
} finally {
os.close();
}
/*
os = Vfs.openWrite("file:/tmp/caucho/qa/test.jpg");
try {
ImageIO.write(_image, "jpeg", os);
} finally {
os.close();
}
os = Vfs.openWrite("file:/tmp/caucho/qa/test.png");
try {
ImageIO.write(_image, "png", os);
} finally {
os.close();
}
*/
return parseImageJpeg(ts.openRead());
}
private boolean parseImageJpeg(ReadStream is)
throws IOException
{
int ch = is.read();
if (ch != 0xff)
return false;
if (is.read() != 0xd8)
return false;
TempStream ts = new TempStream();
WriteStream ws = new WriteStream(ts);
ws.write(0xff);
ws.write(0xd8);
is.writeToStream(ws);
ws.close();
// XXX: issues with _jpegHead vs ts.openReadAndSaveBuffer()
_jpegHead = ts.getHead();
is.close();
_is = new ReadStream();
ts.openRead(_is);
parseJPEG();
return true;
}
private boolean parseGIF()
throws IOException
{
int width = (_is.read() & 0xff) + 256 * (_is.read() & 0xff);
int heigth = (_is.read() & 0xff) + 256 * (_is.read() & 0xff);
int flags = _is.read();
int background = _is.read();
int pad = _is.read();
int depth = (flags & 0x7) + 1;
int []colorMap = null;
if ((flags & 0x80) != 0) {
colorMap = parseGIFColorMap(depth);
}
else {
System.out.println("GIF: can't cope with local");
return false;
}
int ch = _is.read();
if (ch != ',')
return false;
int imgLeft = (_is.read() & 0xff) + 256 * (_is.read() & 0xff);
int imgTop = (_is.read() & 0xff) + 256 * (_is.read() & 0xff);
int imgWidth = (_is.read() & 0xff) + 256 * (_is.read() & 0xff);
int imgHeight = (_is.read() & 0xff) + 256 * (_is.read() & 0xff);
flags = _is.read() & 0xff;
if ((flags & 0x80) != 0) {
System.out.println("GIF: can't cope with local");
return false;
}
if ((flags & 0x40) != 0) {
System.out.println("GIF: can't cope with interlaced");
return false;
}
parseGIFData(colorMap);
return false;
}
private int []parseGIFColorMap(int depth)
throws IOException
{
int []values = new int[1 << depth];
for (int i = 0; i < values.length; i++) {
int value = (0x10000 * (_is.read() & 0xff) +
0x100 * (_is.read() & 0xff) +
0x1 * (_is.read() & 0xff));
values[i] = value;
}
return values;
}
private void parseGIFData(int []colorMap)
throws IOException
{
/*
System.out.println("CS: " + codeSize);
int []strings = new int[4096];
for (int i = 0; i < clearCode; i++)
strings[i] = i;
while ((blockCount = _is.read()) > 0) {
int offset = 0;
int prev = 0;
for (int i = 0; i < blockCount; i++) {
int data = _is.read();
if (i == 0) {
System.out.println("C: " + data);
System.out.println("C: " + (data & _codeMask));
}
}
}
*/
}
private boolean parseJPEG()
throws IOException
{
if (_is.read() != 0xff ||
_is.read() != 0xd8)
return false;
int ch;
while ((ch = _is.read()) == 0xff) {
ch = _is.read();
if (ch == 0xff) {
_is.unread();
}
else if (0xd0 <= ch && ch <= 0xd9) {
// rst
}
else if (0x01 == ch) {
// rst
}
else if (ch == 0xc0) {
int len = 256 * _is.read() + _is.read();
_bits = _is.read();
_height = 256 * _is.read() + _is.read();
_width = 256 * _is.read() + _is.read();
_type = "jpeg";
return true;
}
else {
int len = 256 * _is.read() + _is.read();
_is.skip(len - 2);
}
}
return false;
}
String getResourceName()
{
return "/XObject";
}
String getResource()
{
return ("<< /I" + _id + " " + _id + " 0 R >>");
}
/**
* Writes the object to the stream
*/
public void writeObjectNew(PDFWriter out)
throws IOException
{
long length = _path.getLength();
out.println("<< /Type /XObject");
out.println(" /Subtype /Image");
out.println(" /Width " + _width);
out.println(" /Height " + _height);
out.println(" /ColorSpace /DeviceRGB");
out.println(" /BitsPerComponent " + _bits);
// out.println(" /Filter /DCTDecode");
out.println(" /Length " + length);
out.println(">>");
out.println("stream");
TempBuffer tb = TempBuffer.allocate();
byte []buffer = tb.getBuffer();
int sublen;
InputStream is = _path.openRead();
while ((sublen = is.read(buffer, 0, buffer.length)) > 0) {
out.write(buffer, 0, sublen);
}
out.println();
out.println("endstream");
}
public void writeObject(PDFWriter out)
throws IOException
{
int length = 0;
for (TempBuffer ptr = _jpegHead; ptr != null; ptr = ptr.getNext())
length += ptr.getLength();
out.println("<< /Type /XObject");
out.println(" /Subtype /Image");
out.println(" /Width " + _width);
out.println(" /Height " + _height);
out.println(" /ColorSpace /DeviceRGB");
out.println(" /BitsPerComponent " + _bits);
out.println(" /Filter /DCTDecode");
out.println(" /Length " + length);
out.println(">>");
out.println("stream");
for (TempBuffer ptr = _jpegHead; ptr != null; ptr = ptr.getNext()) {
out.write(ptr.getBuffer(), 0, ptr.getLength());
}
out.println();
out.println("endstream");
}
static class GIFDecode {
private final int _codeSize;
private final int _clearCode;
private final int _endOfCode;
private ReadStream _is;
private int _blockSize;
GIFDecode(ReadStream is)
throws IOException
{
_is = is;
_codeSize = _is.read();
_clearCode = 1 << _codeSize;
_endOfCode = _clearCode + 1;
}
int readByte()
throws IOException
{
if (_blockSize < 0)
return -1;
else if (_blockSize == 0) {
_blockSize = _is.read();
if (_blockSize == 0) {
_blockSize = -1;
return -1;
}
}
_blockSize--;
return _is.read();
}
}
}