Ha!!!
I tried with GT-2.3.1-SNAPSHOT-rev24168 and it works GREAT!
I added some time markers to the example code below and here are the
comparisons. Thanks you all for the help.
Steve
GT-2.3.0:
PROCESSING TIME 1: 1.438 SECONDS
PROCESSING TIME 2: 2.563 SECONDS
PROCESSING TIME 3: 171.203 SECONDS
TOTAL PROCESSING TIME: 171.985 SECONDS
GT-2.3.1-SNAPSHOT-rev24168
PROCESSING TIME 1: 1.484 SECONDS
Feb 5, 2007 9:22:35 AM FactoryRegistry scanForPlugins
WARNING: Can't load a service for category "DataSource". Cause is
"NoClassDefFoundError: org/postgresql/jdbc3/Jdbc3SimpleDataSource".
PROCESSING TIME 2: 3.328 SECONDS
PROCESSING TIME 3: 4.141 SECONDS
TOTAL PROCESSING TIME: 4.75 SECONDS
package steve.test;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.awt.image.DataBuffer;
import java.awt.image.WritableRaster;
import java.io.File;
import javax.imageio.ImageIO;
import javax.media.jai.RasterFactory;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.GridCoverageFactory;
import org.geotools.geometry.GeneralEnvelope;
import org.geotools.geometry.jts.ReferencedEnvelope;
import org.geotools.map.DefaultMapContext;
import org.geotools.map.MapContext;
import org.geotools.referencing.crs.DefaultGeographicCRS;
import org.geotools.renderer.lite.StreamingRenderer;
import org.geotools.styling.RasterSymbolizer;
import org.geotools.styling.Style;
import org.geotools.styling.StyleBuilder;
public class RenderGridCoverageExample {
public static void main(String[] args) {
try {
// 1) Create dummy GridCoverage
int width = 800; // set to 400 to create another exception
when scaleX*scaleY > 1.0
int height = 800;
long startTime = System.currentTimeMillis();
GridCoverageFactory gcFactory = new GridCoverageFactory();
java.awt.geom.Rectangle2D.Double rect =
new java.awt.geom.Rectangle2D.Double(-80.0, 30.0, 5.0, 5.0);
GeneralEnvelope envelope = new GeneralEnvelope(rect);
envelope.setCoordinateReferenceSystem(DefaultGeographicCRS.WGS84);
WritableRaster raster =
RasterFactory.createBandedRaster(DataBuffer.TYPE_FLOAT, width, height,
1, null);
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
raster.setSample(i, j, 0, i*j);
}
}
double[] minValues = new double[] { 0.0 };
double[] maxValues = new double[] { width*height };
Color[] colors = new Color[] { Color.BLUE, Color.GREEN };
GridCoverage2D gc = gcFactory.create("My colored coverage",
raster,
envelope, minValues, maxValues, null, new
Color[][]{colors}, null);
//gc.show();
System.out.println("PROCESSING TIME 1:
"+(System.currentTimeMillis()-startTime)/1000.0+" SECONDS");
// 2) Create MapContext
MapContext context = new
DefaultMapContext(DefaultGeographicCRS.WGS84);
// 3 Add GridCoverage
final StyleBuilder sb = new StyleBuilder();
final RasterSymbolizer rs = sb.createRasterSymbolizer();
Style style = sb.createStyle(rs);
context.addLayer(gc, style);
// 4) init renderer
StreamingRenderer renderer = new StreamingRenderer();
// 5) set context in renderer
renderer.setContext(context);
// 6) init image (large black rectangle)
BufferedImage bufImage = new BufferedImage(800, 600,
BufferedImage.TYPE_INT_ARGB);
// 7) create ReferencedEnvelope
ReferencedEnvelope refEnv = new ReferencedEnvelope(envelope,
context.getCoordinateReferenceSystem());
System.out.println("PROCESSING TIME 2:
"+(System.currentTimeMillis()-startTime)/1000.0+" SECONDS");
// 8) paint the context onto the blank image
renderer.paint(
(Graphics2D)bufImage.getGraphics(),
new Rectangle(bufImage.getWidth(),
bufImage.getHeight()),
adjustGeographicBounds(bufImage, refEnv));
System.out.println("PROCESSING TIME 3:
"+(System.currentTimeMillis()-startTime)/1000.0+" SECONDS");
// 9) write image
ImageIO.write(bufImage, "png", new
File("RenderGridCoverageExample.png"));
System.out.println("TOTAL PROCESSING TIME:
"+(System.currentTimeMillis()-startTime)/1000.0+" SECONDS");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static ReferencedEnvelope
adjustGeographicBounds(BufferedImage image, ReferencedEnvelope bounds) {
double imgRatio = (double)image.getWidth() /
(double)image.getHeight();
double geoRatio = bounds.getWidth() / bounds.getHeight();
double dlon = bounds.getWidth();
double dlat = bounds.getHeight();
double geoCenterX = bounds.getMinX() + (dlon / 2.0);
double geoCenterY = bounds.getMinY() + (dlat / 2.0);
double x = imgRatio / geoRatio;
if (x > 1.0) {
dlon = dlon * x;
}
else {
dlat = dlat / x;
}
return new ReferencedEnvelope(
geoCenterX + dlon / 2.0,
geoCenterX - dlon / 2.0,
geoCenterY + dlat / 2.0,
geoCenterY - dlat / 2.0,
bounds.getCoordinateReferenceSystem()
);
} // end adjustGeographicBounds()
}
Andrea Antonello wrote:
I tried the code as well on a Kubuntu distro.
It shows up very quickly both with a jdk1.5 without native jai libs
installed as well as with a 1.6 with jai native install.
Cheers
Andrea
Simone wrote:
Ciao steve,
that might explain this sloweness.
I have tried on fedora 5 and it is even faster than on windows xp.
One advice. please install the JAI ImageIO tools package since it ships with
a nice
native encoder for png which should make things a bit faster anyway.
Let us know if you have more problems.
Regards,
Simone.
----- Original Message -----
From: "Steve.Ansari" <[EMAIL PROTECTED]>
To: "Simone Giannecchini" <[EMAIL PROTECTED]>
Cc: <geotools-gt2-users@lists.sourceforge.net>
Sent: Monday, February 05, 2007 2:59 PM
Subject: Re: [Geotools-gt2-users] Slow rendering of GridCoverage objects
Hi Simone/Andrea,
I'm using:
Java jre1.5.0_04
JAI installed from: jai-1_1_3-lib-windows-i586-jre.exe
ImageIO from standard Java API - no native installs
I isolated the slowness to this line in GridCoverageRenderer:
graphics.drawRenderedImage(finalImage, cloneFinalWorldToGrid);
After some googling, I found this resolved Sun bug report:
http://bugs.sun.com/bugdatabase/view_bug.do;jsessionid=8d01140ef3bea515d4807d013cfa:YfiG?bug_id=5073407
However, this should be fixed in my JRE version and the example code
with the bug report runs fine for me.
I'm now going to try with the nightly snapshot.
Thanks for looking into this,
Steve
Simone Giannecchini wrote:
Ciao Andrea,
I doubt it depends on differences between 2.3.0 and the actual code,
but I want to check.
Since the timed code contains a write operation performed using
ImageIO directly it might be and old version of ImageIO giving
problems, or the absence of the native codec for PNGs, or difference
of performance on a different platform (I only tested on windows for
the moment).
With a bit more info, I will try to spot the source of these problems.
Simone.
On 2/5/07, Andrea Aime <[EMAIL PROTECTED]> wrote:
Simone Giannecchini ha scritto:
Ciao Steve,
I need a couple more info about your platform:
java version
os
JAI and ImageIO version
I ran your example as it was (well, to be honest I removed the line
where you were showing the created coverage) and I got the following
execution time:
PROCESSING TIME: 7.86 SECONDS
I am using geotools 2.3.x compiled from SVN.
If you provide me with more info, I can try to spot the cause of your
problems.
Simone, may it be that the changes performed after the 2.3.0 release
account for this speed difference?
Cheers
Andrea
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Physical Scientist
NOAA's National Climatic Data Center
Veach-Baley Federal Building
151 Patton Avenue
Asheville, NC 28801
Ph: 828-271-4611
Fax: 828-271-4022
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job
easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Geotools-gt2-users mailing list
Geotools-gt2-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Geotools-gt2-users mailing list
Geotools-gt2-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
--
Steve Ansari
Physical Scientist
NOAA's National Climatic Data Center
Veach-Baley Federal Building
151 Patton Avenue
Asheville, NC 28801
Ph: 828-271-4611
Fax: 828-271-4022
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Geotools-gt2-users mailing list
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