Solved

ImageIO.write produces incomplete image

Posted on 2004-08-20
5
1,411 Views
Last Modified: 2010-08-05
I'm using Java 1.4.2-04 and ImageIO.write to create a jpeg.  Occassionaly the complete image is produced for a file size of about 150K. However, the image is usually incomplete with no consistency on what parts are drawn,

File file = new File(fileName);
BufferedImage b = new BufferedImage((int)diagramWidth, (int)diagramHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D g = (Graphics2D)b.getGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, (int)diagramWidth, (int)diagramHeight);
g.setColor(Color.black);
ColorModel cm = b.getColorModel();
...draw lost of text and shapes...
ImageIO.write(b, "jpg", file);

Thanks
0
Comment
Question by:John4343
5 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 11851716
Unfortunately it's around

>>...draw lost of text and shapes...

that the problem is likely to lie ;-)
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 11851741
... which you may be able to (and would be good to) confirm by

g.setColor(Color.red);
g.fillRect(0, 0, (int)diagramWidth, (int)diagramHeight);
// DON'T draw lots of text and shapes
ImageIO.write(b, "jpg", file);


and THEN check it
0
 
LVL 20

Expert Comment

by:Venabili
ID: 11852180
Try to use BufferedImage.TYPE_INT_ARGB instead of  BufferedImage.TYPE_INT_RGB
I had similar troubles with the  BufferedImage.TYPE_INT_RGB
0
 
LVL 1

Accepted Solution

by:
SlimHealer earned 250 total points
ID: 11854564
The problem is that the graphics pipeline doesn't know that you are finished using the graphics object you obtained with the call to getGraphics().

Add a

     g.dispose();

before the line:

   ImageIO.write(b, "jpg", file);

This should force java to flush the graphics pipleines.
0
 
LVL 92

Expert Comment

by:objects
ID: 11856875
>>>...draw lost of text and shapes...
>that the problem is likely to lie ;-)

Can you explain why you think that whats painted to the image is causing the problem, and what problems painting to the image can cause?
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
groupSumClump challenge 9 115
Java Loop 6 61
why cannot we forward request once the response is committed 2 42
Should localization be done inside spring controller 5 26
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question