How to save or save a drawing in a PNG or any Image file format ?

Hi,
I am working on a signature capturing application using J2ME MIDP 2.0 for Palm Treo 750 with Windows Mobile 6.0
I am taking signatures as a drawing on a CustomItem.
Now, i want to send it to a php script running on Apache server to save this signature as a PNG, jpeg or any image file at server end.
or how can i save this drawing on my local file system as a png or any other type of image file.
Plz help if anybody knows the right way....
Thanks.

Hi Hithayath,
Thnx for the reply.
Actually, i hv no problem in storing a data locally or sending it on a web server. The problem in related with the formats.
I mean, how can we create a png or jpg file using the raw bytes of an image drawn on a canvas or CustomItem.. ?
We can get the integer array of RGB points using getRGB() method of image object. Now, if i will write this data after converting to binary in a file then that file
will show a message like "Preview not available". It means the format is not recognized.
So, my question is how can we convert this raw data in a png or jpg format so it can be displayed on a web page or stored in a png or jpg file..?
I think now u can better understand the problem.
Waiting for the reply....
Thanks. :)

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John Bo wrote:
Hi ppl.That words is 'people'. By leaving out three letters, you do not appear cool, just lazy & foolish.
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hiee
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* SaveAsGif_Demo.java
* Created on 13 mars 2005, 11:26
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.NoSuchElementException;
import javax.swing.*;
* @author Andr� Uhres
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if(!(obj instanceof Integer)) {
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if(!(obj instanceof Integer)) {
throw new InternalError("key is not an Integer");
} else {
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for(int i = ainthashtableentry.length; --i >= 0;)
ainthashtableentry[i] = null;
count = 0;
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inthashtable.table = new IntHashtableEntry[table.length];
for(int i = table.length; i-- > 0;)
inthashtable.table[i] = table[i] == null ? null : (IntHashtableEntry)table[i].clone();
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throw new InternalError();
public synchronized String toString() {
int i = size() - 1;
StringBuffer stringbuffer = new StringBuffer();
Enumeration enumeration = keys();
Enumeration enumeration1 = elements();
stringbuffer.append("{");
for(int j = 0; j <= i; j++) {
String s = enumeration.nextElement().toString();
String s1 = enumeration1.nextElement().toString();
stringbuffer.append(s + "=" + s1);
if(j < i)
stringbuffer.append(", ");
stringbuffer.append("}");
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private int count;
private int threshold;
private float loadFactor;
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encodePixelsWrapper(i, j + k1, k, 1, ai, 0, k);
catch(IOException ioexception) {
iox = ioexception;
stop();
return;
public void setPixels(int i, int j, int k, int l, ColorModel colormodel, int ai[], int i1,
int j1) {
if(colormodel == rgbModel) {
try {
encodePixelsWrapper(i, j, k, l, ai, i1, j1);
return;
catch(IOException ioexception) {
iox = ioexception;
stop();
return;
int ai1[] = new int[k];
for(int k1 = 0; k1 < l; k1++) {
int l1 = i1 + k1 * j1;
for(int i2 = 0; i2 < k; i2++)
ai1[i2] = colormodel.getRGB(ai[l1 + i2]);
try {
encodePixelsWrapper(i, j + k1, k, 1, ai1, 0, k);
catch(IOException ioexception1) {
iox = ioexception1;
stop();
return;
public void imageComplete(int i) {
producer.removeConsumer(this);
if(i == 4)
iox = new IOException("image aborted");
else
try {
encodeFinish();
encodeDone();
catch(IOException ioexception) {
iox = ioexception;
stop();
protected OutputStream out;
private ImageProducer producer;
private int width;
private int height;
private int hintflags;
private boolean started;
private boolean encoding;
private IOException iox;
private static final ColorModel rgbModel = ColorModel.getRGBdefault();
private Hashtable props;
private boolean accumulate;
private int accumulator[];
class GifEncoderHashitem {
public GifEncoderHashitem(int i, int j, int k, boolean flag) {
rgb = i;
count = j;
index = k;
isTransparent = flag;
public int rgb;
public int count;
public int index;
public boolean isTransparent;
class GifEncoder extends ImageEncoder {
public GifEncoder(Image image, OutputStream outputstream) throws IOException {
super(image, outputstream);
interlace = false;
maxbits = 12;
maxmaxcode = 4096;
htab = new int[5003];
codetab = new int[5003];
hsize = 5003;
clear_flg = false;
accum = new byte[256];
public GifEncoder(Image image, OutputStream outputstream, boolean flag) throws IOException {
super(image, outputstream);
interlace = false;
maxbits = 12;
maxmaxcode = 4096;
htab = new int[5003];
codetab = new int[5003];
hsize = 5003;
clear_flg = false;
accum = new byte[256];
interlace = flag;
public GifEncoder(ImageProducer imageproducer, OutputStream outputstream) throws IOException {
super(imageproducer, outputstream);
interlace = false;
maxbits = 12;
maxmaxcode = 4096;
htab = new int[5003];
codetab = new int[5003];
hsize = 5003;
clear_flg = false;
accum = new byte[256];
public GifEncoder(ImageProducer imageproducer, OutputStream outputstream, boolean flag) throws IOException {
super(imageproducer, outputstream);
interlace = false;
maxbits = 12;
maxmaxcode = 4096;
htab = new int[5003];
codetab = new int[5003];
hsize = 5003;
clear_flg = false;
accum = new byte[256];
interlace = flag;
void encodeStart(int i, int j) throws IOException {
width = i;
height = j;
rgbPixels = new int[j][i];
void encodePixels(int i, int j, int k, int l, int ai[], int i1, int j1) throws IOException {
for(int k1 = 0; k1 < l; k1++)
System.arraycopy(ai, k1 * j1 + i1, rgbPixels[j + k1], i, k);
void encodeDone() throws IOException {
int i = -1;
int j = -1;
colorHash = new IntHashtable();
int k = 0;
for(int l = 0; l < height; l++) {
for(int i1 = 0; i1 < width; i1++) {
int j1 = rgbPixels[l][i1];
boolean flag = j1 >>> 24 < 128;
if(flag)
if(i < 0) {
i = k;
j = j1;
} else
if(j1 != j)
rgbPixels[l][i1] = j1 = j;
GifEncoderHashitem gifencoderhashitem = (GifEncoderHashitem)colorHash.get(j1);
if(gifencoderhashitem == null) {
if(k >= 256)
throw new IOException("too many colors for a GIF");
gifencoderhashitem = new GifEncoderHashitem(j1, 1, k, flag);
k++;
colorHash.put(j1, gifencoderhashitem);
} else {
gifencoderhashitem.count++;
byte byte0;
if(k <= 2)
byte0 = 1;
else
if(k <= 4)
byte0 = 2;
else
if(k <= 16)
byte0 = 4;
else
byte0 = 8;
int k1 = 1 << byte0;
byte abyte0[] = new byte[k1];
byte abyte1[] = new byte[k1];
byte abyte2[] = new byte[k1];
for(Enumeration enumeration = colorHash.elements(); enumeration.hasMoreElements();) {
GifEncoderHashitem gifencoderhashitem1 = (GifEncoderHashitem)enumeration.nextElement();
abyte0[gifencoderhashitem1.index] = (byte)(gifencoderhashitem1.rgb >> 16 & 0xff);
abyte1[gifencoderhashitem1.index] = (byte)(gifencoderhashitem1.rgb >> 8 & 0xff);
abyte2[gifencoderhashitem1.index] = (byte)(gifencoderhashitem1.rgb & 0xff);
GIFEncode(super.out, width, height, interlace, (byte)0, i, byte0, abyte0, abyte1, abyte2);
byte GetPixel(int i, int j) throws IOException {
GifEncoderHashitem gifencoderhashitem = (GifEncoderHashitem)colorHash.get(rgbPixels[j][i]);
if(gifencoderhashitem == null)
throw new IOException("color not found");
else
return (byte)gifencoderhashitem.index;
static void writeString(OutputStream outputstream, String s) throws IOException {
byte abyte0[] = s.getBytes();
outputstream.write(abyte0);
void GIFEncode(OutputStream outputstream, int i, int j, boolean flag, byte byte0, int k, int l,
byte abyte0[], byte abyte1[], byte abyte2[]) throws IOException {
Width = i;
Height = j;
Interlace = flag;
int k1 = 1 << l;
int j1;
int i1 = j1 = 0;
CountDown = i * j;
Pass = 0;
int l1;
if(l <= 1)
l1 = 2;
else
l1 = l;
curx = 0;
cury = 0;
writeString(outputstream, "GIF89a");
Putword(i, outputstream);
Putword(j, outputstream);
char c = '\uFF80';
c |= 'p';
c |= (byte)(l - 1);
Putbyte((byte)c, outputstream);
Putbyte(byte0, outputstream);
Putbyte((byte)0, outputstream);
for(int i2 = 0; i2 < k1; i2++) {
Putbyte(abyte0[i2], outputstream);
Putbyte(abyte1[i2], outputstream);
Putbyte(abyte2[i2], outputstream);
if(k != -1) {
Putbyte((byte)33, outputstream);
Putbyte((byte)-7, outputstream);
Putbyte((byte)4, outputstream);
Putbyte((byte)1, outputstream);
Putbyte((byte)0, outputstream);
Putbyte((byte)0, outputstream);
Putbyte((byte)k, outputstream);
Putbyte((byte)0, outputstream);
Putbyte((byte)44, outputstream);
Putword(i1, outputstream);
Putword(j1, outputstream);
Putword(i, outputstream);
Putword(j, outputstream);
if(flag)
Putbyte((byte)64, outputstream);
else
Putbyte((byte)0, outputstream);
Putbyte((byte)l1, outputstream);
compress(l1 + 1, outputstream);
Putbyte((byte)0, outputstream);
Putbyte((byte)59, outputstream);
void BumpPixel() {
curx++;
if(curx == Width) {
curx = 0;
if(!Interlace) {
cury++;
return;
switch(Pass) {
default:
break;
case 0: // '\0'
cury += 8;
if(cury >= Height) {
Pass++;
cury = 4;
return;
break;
case 1: // '\001'
cury += 8;
if(cury >= Height) {
Pass++;
cury = 2;
return;
break;
case 2: // '\002'
cury += 4;
if(cury >= Height) {
Pass++;
cury = 1;
return;
break;
case 3: // '\003'
cury += 2;
return;
int GIFNextPixel() throws IOException {
if(CountDown == 0) {
return -1;
} else {
CountDown--;
byte byte0 = GetPixel(curx, cury);
BumpPixel();
return byte0 & 0xff;
void Putword(int i, OutputStream outputstream) throws IOException {
Putbyte((byte)(i & 0xff), outputstream);
Putbyte((byte)(i >> 8 & 0xff), outputstream);
void Putbyte(byte byte0, OutputStream outputstream) throws IOException {
outputstream.write(byte0);
final int MAXCODE(int i) {
return (1 << i) - 1;
void compress(int i, OutputStream outputstream) throws IOException {
g_init_bits = i;
clear_flg = false;
n_bits = g_init_bits;
maxcode = MAXCODE(n_bits);
ClearCode = 1 << i - 1;
EOFCode = ClearCode + 1;
free_ent = ClearCode + 2;
char_init();
int j1 = GIFNextPixel();
int i2 = 0;
for(int j = hsize; j < 0x10000; j *= 2)
i2++;
i2 = 8 - i2;
int l1 = hsize;
cl_hash(l1);
output(ClearCode, outputstream);
int i1;
label0:
while((i1 = GIFNextPixel()) != -1) {
int k = (i1 << maxbits) + j1;
int l = i1 << i2 ^ j1;
if(htab[l] == k) {
j1 = codetab[l];
continue;
if(htab[l] >= 0) {
int k1 = l1 - l;
if(l == 0)
k1 = 1;
do {
if((l -= k1) < 0)
l += l1;
if(htab[l] == k) {
j1 = codetab[l];
continue label0;
} while(htab[l] >= 0);
output(j1, outputstream);
j1 = i1;
if(free_ent < maxmaxcode) {
codetab[l] = free_ent++;
htab[l] = k;
} else {
cl_block(outputstream);
output(j1, outputstream);
output(EOFCode, outputstream);
void output(int i, OutputStream outputstream) throws IOException {
cur_accum &= masks[cur_bits];
if(cur_bits > 0)
cur_accum |= i << cur_bits;
else
cur_accum = i;
for(cur_bits += n_bits; cur_bits >= 8; cur_bits -= 8) {
char_out((byte)(cur_accum & 0xff), outputstream);
cur_accum >>= 8;
if(free_ent > maxcode || clear_flg)
if(clear_flg) {
maxcode = MAXCODE(n_bits = g_init_bits);
clear_flg = false;
} else {
n_bits++;
if(n_bits == maxbits)
maxcode = maxmaxcode;
else
maxcode = MAXCODE(n_bits);
if(i == EOFCode) {
for(; cur_bits > 0; cur_bits -= 8) {
char_out((byte)(cur_accum & 0xff), outputstream);
cur_accum >>= 8;
flush_char(outputstream);
void cl_block(OutputStream outputstream) throws IOException {
cl_hash(hsize);
free_ent = ClearCode + 2;
clear_flg = true;
output(ClearCode, outputstream);
void cl_hash(int i) {
for(int j = 0; j < i; j++)
htab[j] = -1;
void char_init() {
a_count = 0;
void char_out(byte byte0, OutputStream outputstream) throws IOException {
accum[a_count++] = byte0;
if(a_count >= 254)
flush_char(outputstream);
void flush_char(OutputStream outputstream) throws IOException {
if(a_count > 0) {
outputstream.write(a_count);
outputstream.write(accum, 0, a_count);
a_count = 0;
private boolean interlace;
int width;
int height;
int rgbPixels[][];
IntHashtable colorHash;
int Width;
int Height;
boolean Interlace;
int curx;
int cury;
int CountDown;
int Pass;
static final int EOF = -1;
static final int BITS = 12;
static final int HSIZE = 5003;
int n_bits;
int maxbits;
int maxcode;
int maxmaxcode;
int htab[];
int codetab[];
int hsize;
int free_ent;
boolean clear_flg;
int g_init_bits;
int ClearCode;
int EOFCode;
int cur_accum;
int cur_bits;
int masks[] = {
0, 1, 3, 7, 15, 31, 63, 127, 255, 511,
1023, 2047, 4095, 8191, 16383, 32767, 65535
int a_count;
byte accum[];

How to pop up "save" and "open" window - Help with construct xml

In my report there is a column link which is pointing to another HTML page that has xml data displayed in a textarea field. So when user clicks on the column link, he gets to directed to the page that have the xml data in text format.
My question is, how can i make the xml data display as a file, so when the user clicks on the column link, a window with "save" and "open" will pop up so the user can save the xml data as a file?
Has anyone done something similar like this? any help is appreciated!
Regards,
gina
Message was edited by:
gina

Thank you Tine, I tried to use the 'Export XML' report template and tried to do the following query:
SELECT XMLElement("oai_dc:dc",
XMLAttributes('http://www.openarchives.org/OAI/2.0/oai_dc/' AS "xmlns:oai_dc",
'http://purl.org/dc/elements/1.1/' AS "xmlns:dc",
'http://www.w3.org/2001/XMLSchema-instance' AS "xmlns:xsi",
'http://www.loc.gov/mods/v3' AS "xmlns:mods"
XMLForest(
dctitle AS "dc:title",
dccreator AS "dc:creator",
dcsubject AS "dc:subject",
dcdescription AS "dc:description",
dccontributor AS "dc:contributor",
dcdiscovery AS "dc:discovery",
dctype AS "dc:type",
dcformat AS "dc:format",
LOWER('ksl:posters-' || dcidentifier) AS "dc:identifier",
dcsource AS "dc:source",
dclanguage AS "dc:language",
dcrelation AS "dc:relation",
dccoverage AS "dc:coverage",
dcrights AS "dc:rights")) AS "RESULT"
FROM table_name
and here is what returned in the “save as" file:
<?xml version="1.0" encoding="utf-8" ?>
- <XMLREPORTREGION>
- <ROW ROWNUM="1">
<RESULT>[datatype]</RESULT>
</ROW>
</XMLREPORTREGION>
How can i construct the query so that it returns the data in xml format like the following?:
oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
<dc:title>Rose</dc:title>
<dc:creator>Smith Black</dc:creator>
<dc:contributor>Smith Black</dc:contributor>
<dc:type>Stencil</dc:type>
<dc:format>image/tiff</dc:format>
<dc:format>image/jp2</dc:format>
<dc:description>13 3/4" X 9 1/2"</dc:description>
<dc:relation>Some collection</dc:relation>
<dc:date>1987</dc:date>
<dc:subject type="LCSH">Art Project</dc:subject>
<dc:subject type="LCSH">........</dc:subject>
<dc:subject type="LCSH">.........</dc:subject>
<dc:language>eng</dc:language>
<dc:rights>......<dc:rights>
<dc:identifier>.....</dc:identifier>
</oai_dc:dc>
I don't know much about xml, any help would be really appreciated.
Thanks,
gina
Message was edited by:
gina

How to save or save a drawing in a PNG or any Image file format ?

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