Does ImageIO.write of GIF support transparent?

I have been use ImageIO.write and BufferedImage to save current Panel's paint(). with transparency.
BufferedImage image = new BufferedImage(panel.getWidth(), panel.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = image.createGraphics();
components[0].paint(g2);
g2.dispose();
final File file = new File(save_File, "tt.png");
ImageIO.write(image, "png", file);success at PNG with transparency.
but now I want to save as GIF file,not png.
but I change png -> gif
final File file = new File(save_File, "tt.gif");
ImageIO.write(image, "gif", file);it will be all black color picture.
Why?
And how can I success to do this.
Does ImageIO.write of GIF support transparent?
Or it should be some other setting ?

Lots of questions above -- I'll answer one:
There is a handwriting app for the iPad. See http://www.geewhizstuff.com

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ImageIO.write converting to gif

It seems that I can't ImageIO to convert a BufferedImage to the GIF format. Other formats work. According to the program's output (see below), ImageIO should be able to handle GIF. Yet the returned byte array is zero length. What is the problem?
import java.awt.*;
import java.awt.image.*;
import javax.imageio.*;
import java.io.*;
public class JPGTest {
     public static void main(String[] args) {
          try {
               Rectangle screenRectangle = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
               Robot robo = new Robot();
               // take a screenshot
               BufferedImage bufferedImage = robo.createScreenCapture(screenRectangle);
               ByteArrayOutputStream baos = new ByteArrayOutputStream();
               // this line seems to fail
               ImageIO.write(bufferedImage, "gif", baos);
               System.out.println("check whether the \"gif\" format is supported");
               String formatNames[] = ImageIO.getReaderFormatNames();
               for (int i = 0; i < formatNames.length; i ++)
                    System.out.println(formatNames);
               // returns a zero byte array when "gif" is passed into ImageIO.write above
               // yet works when "jpg" is passed in
               byte imageBytes[] = baos.toByteArray();
               System.out.println("Image bytes length: " + imageBytes.length);
          } catch (Exception e) {
               System.out.println(e.getMessage());
And here is the output:
1: the supported images, followed by
2: the obvious conversion-to-gif failure:
check whether the "gif" format is supported
BMP
bmp
jpeg
wbmp
gif
png
JPG
jpg
WBMP
JPEG
Image bytes length: 0

It used to be that some corporation had a patent (or something like that) on the GIF format, so you had to buy a licence from them to be able to produce GIFs. I suspect that is why Sun did not distribute software that could produce GIFs. That's my guess, anyway. Here's a link to a small bit of information about that:
http://mindprod.com/jgloss/gif.html

ImageIO.write to save as GIF file

I have been use ImageIO.write and BufferedImage to save current Panel's paint(). with transparency.
BufferedImage image = new BufferedImage(panel.getWidth(), panel.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = image.createGraphics();
components[0].paint(g2);
g2.dispose();
final File file = new File(save_File, "tt.png");
ImageIO.write(image, "png", file);success at PNG with transparency.
but now I want to save as GIF file,not png.
but I change png -> gif
final File file = new File(save_File, "tt.gif");
ImageIO.write(image, "gif", file);it will be all black color picture.
Why?
And how can I success to do this.

GIF doen't do well for transparent images. For transparent images, you can find total solutions from this theread, including the reasons why gif doen't work;
http://forum.java.sun.com/thread.jspa?threadID=5227456

Problem with ImageIO.write

Hello I am trying to write to file. Here is my code
    try
      File file = new File("C://images//queryX.gif");
    if (file.exists())
        {file.delete();}
      ImageIO.write(bi_new, "GIF", file); // bi_new is my bufferedImage
    catch (IOException e)
      e.printStackTrace();
    }The file is being created but it is blank. The buffered image is fine because i am having it displayed to screen with an imageicon on a Jlabel.
Any ideas why the file is blank?
Cheers.

The likely problem is that an encoder can not be found.
First check the return value from the ImageIO.write() method. If it is false it means that an appropriate
encoder could not be found. (This is quite likely as GIF encoders have some patenting problems and
Im not sure if SUN has included a GIF encoder.
Also it should not be necessary to delete the file if it already exists as the ImageIO.write method will
overwrite it anyway.
matfud

ImageIO.write not working for GIF files

Hi, I downloaded the JAI Image IO tools which contains a class called
com/sun/media/imageioimpl/plugins/gif/GIFImageWriter
I am able to save png files using just the ImageIO apis and without the JAI.
But for GIF images, I read in the forum that the JAI has a writer. Though
the JAI documentation doesn't explicitly mention support for GIF writing,
seeing this class in jai_imageio.jar, I thought I could write the GIF files.

I had to create a BufferedImage with IndexColorModel
to be able to save it as a GIF file.
Then it worked. However, I still seem to have a
problem with the saved image. I opened
a GIF file and saved it back and I see that the color
pallette has completely changed.As you know GIF format supports only up to 256 colors. That's why any good GIF encoder should contain a Java Color Quantizer to reduce the number on unique colors. The best solution I've found is the Gif4J PRO (http://www.gif4j.com/java-gif-imaging-gif4j-pro-library.htm). This library very fast and powerful and contains the fastest, most intelligent and qualitative Java color quantizer (http://www.gif4j.com/java-color-quantizer.htm).
Regards

Gif support true transparency?

gif support true transparency?

Tiff is a big image, so probably not. Do a web search for gif vs png. Might look at this also http://animation.about.com/b/2010/10/08/animated-gifs-vs-animated-pngs.htm

Does iphoto support transparency in images?

does iphoto support transparency in images?

Import the photos and create a small test book -
Before ordering your book preview it using this method - http://support.apple.com/kb/HT1040 - and save the resulting PDF for reference - the delivered book will match it.
If the preview is what you want then you can go ahead and create the book, preview it and order knowing tha the printed version will match the preview
LN

Does oracle 10.1 support transparent data encryption?

hi,
does oracle Release 10.1.0.3.0 support transparent data encryption?
if not, what can i use instead?
thanks

According to http://download-uk.oracle.com/docs/cd/B14117_01/network.101/b10772/asoconfg.htm ,
data encryption is supported for Oracle Net services in release 10.1.

Using imageio to convert .gif to .jpg gives bad image

Hi,
I'm looking at the 1.4 javax.imageio API, and wrote a naive
program to convert images from one format to another.
It will read .gif, .jpg or .png and correctly write .gif and .png
images, but when I try to write a .jpg from a .gif or .png
the result is very black-looking - actually most of the colour
is there but changed to a very dark level and red switched to blue
for example. Presumably there is a reason that this doesn't work,
or is it a bug? I would've though an exception would be thrown
if the image types selected were incompatible.
Also, how does one specify the JPEG quality setting?
Thanks for any clues,
Ed
import javax.imageio.*;
import java.awt.*;
import java.io.*;
import java.awt.image.*;
public class ImageTest
public static void main(String[] argv)
try
File f1 = new File(argv[0]);
BufferedImage bi = ImageIO.read(f1);
System.out.println("Read "+f1+" OK.");
System.out.println("Image="+bi);
File f2 = new File(argv[1]);
String extn = f2.getName();
extn = extn.substring(extn.lastIndexOf('.')+1);
ImageIO.write(bi, extn, f2);
System.out.println("Wrote "+f2+" OK format="+extn);
catch (Exception ex)
ex.printStackTrace();

Interesting, the program works correctly on Windows 2000
and Solaris Sparc; The .jpg file creating problem only
occurs on my Solaris x86 machine.
Ed

Is it possible to create an animated GIF with transparency in AME?

I have Adobe Media Encoder CS5.5 with Windows 7. Is it possible to save a video (I saved it as uncompressed AVI from After Effects) as an animated GIF with transparency in it (eg. black=transparent)?
I also have VirtualDub 1.9.11 but don't see a transparency option in that.
It's for the web where I'd like the normal web background to show in the black (ie. should be transparent) parts of the GIF.

Thanks. But if I wanted to keep using it it costs about £600 to buy. Would Adobe Photoshop Elements 11 be able to do this too (also, seeing as there is an animated gif creation option in AME and used to be in AE, couldn't they just add a checkbox etc. for AME/and AE for doing transparent gifs in those if they don't support it? Since transparency is a standard feature of .GIF is seems strange to allow GIF creation but not allow transparency)?

Using animated gifs with transparent background.

Hi guys,
Keynotes 6.2.
I have been onto apple support with this problem.
I add a transparent animated gif to my project.
It show as a movie correctly in the presentation but when exported as quicktime or HTML the movies fail.
We eventually found out that quicktime does not support animated gifs. ( support.apple.com/kb/ht3775 )
So I exported the animation onto a folder with all the frames separately and brought them into final cut pro.
I then followed these tutorials on how to export with transparent background. ( http://provideocoalition.com/mspencer/video/fcp-x-and-alpha-channels and http://www.larryjordan.biz/fcp-export-transparency ).
I now have a quicktime movie that if I bring back into Final Cut Pro it has a transparent background.
However when I bring into keynotes it still has a black background. (presumably keynotes does not recognise the Apple Prores 444).
Any ideas how I can achieve what I need. ?
I am using a program called crazytalk animator and can output with transparent background. Animated Gif or a series of image stills BMP, JPEG, TGA or PNG.
Cheers
SteveW

This has been an ongoing issue for me since I switched from Powerpoint to Keynote. Most of the animated gifs with transparent backgrounds that I used with Powerpoint are no longer transparent in Keynote. You may want to search for those earlier threads on this topic...
To summarize: I've had to open up my animated gifs in After Effects and use the Color Key effect to restore transparency, with mixed success.
Good luck!

Animated gif with transparent background

When I import in Keynote an animated gif with transparent background. The background becomes white. I did the following tests:
If I extract a single image from the animated gif and import it in keynote the background is actually transparent but it becomes white when I import the whole gif.
I also checked with other applications (NeoOffice) and the animated gif does come out with a transparent background.
Do I do something wrong in Keynote ?

This has been an ongoing issue for me since I switched from Powerpoint to Keynote. Most of the animated gifs with transparent backgrounds that I used with Powerpoint are no longer transparent in Keynote. You may want to search for those earlier threads on this topic...
To summarize: I've had to open up my animated gifs in After Effects and use the Color Key effect to restore transparency, with mixed success.
Good luck!

Does Adobe Acrobat 8 Professional support image which has been converted to a PDF to be edited?

Hi,
Does Adobe Acrobat 8 Professional support the content of an image which has been converted to a PDF file to be edited?
Sometimes when I try to edit the content of a PDF file which was created by converting an image into a PDF file, I notice that Adobe Acrobat 8 Professional tells me that this Adobe Acrobat 8 Professional cannot support this content.
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Thanks very much,
Sometimes when I try to edit the content of PDF files which were created by converting an image into a PDF file, I notice that that Adobe Acrobat 8 Professional tells me that tells me that this content cannot be supported
Even in the case of files created from word processing files, I notice that there are far too many restrictions in editing the content. For example, if you insert extra words or characters, the text does not automatically word-wrap. In addition, the "Enter key" does not work properly to insert a new line at the expected position. As a result, the text is quite crazy.

HT201991 How does one write a review for an app?

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Does PI 7.1 EHP1 supports java version 1.6?

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Does ImageIO.write of GIF support transparent?

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