Scale your image on the client side. GWT/HTML has many options to work with
and I'm in love with that!
http://code.google.com/p/gwt-examples/wiki/gwt_hmtl5
Brandon Donnelson
http://gwt-examples.googlecode.com
http://c.gawkat.com
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I'm going to try to get the job done with HTML5 for now, until the server
has the features to do the job.
http://google-web-toolkit.googlecode.com/svn/javadoc/latest/index.html?overview-summary.html
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#images
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I get the correct byte count reading it this way:
private byte[] getImageBytes(BlobData blobData) {
if (blobData == null) {
return null;
}
BlobKey blobKey = new BlobKey(blobData.getKey());
if (blobKey == null) {
return null;
}
long filesize
I think my problem is in reading the bytes into the array. Oh, if this is
it, I'm been barking up the wrong tree.
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I keep getting this error reading data from the blob.
[ERROR] createTiles(): Error: java.lang.IllegalArgumentException:
corruptJPEG
format
java.lang.IllegalArgumentException: corrupt JPEG format
atcom.google.appengine.api.images.ImageImpl.updateJpegDimensions(ImageImpl.java
:261)
Need an Image Service Api Roadmap to new features scheduled to be added.
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Need Exif methods.
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Need a testImageEncoding() to verify its a good image.
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Here is what I'd shoot for having app engine do on the server side, just
like HTML5 could do on the client side.
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#images
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This won't work either. I get the same funky colors. So far I think the
cropping does not work at all.
leftX = .05D;
topY = .05D;
rightX = .10D;
bottomY = .10D;
oldImage = ImagesServiceFactory.makeImageFromBlob(new
BlobKey(fd.getBlobData().getKey()));
Transform transform = ImagesServiceFa
This won't work:
I can't figure out yet why I getting funky colors while cropping an image
both on the dev and production side.
For the file uploaded:
Transform transform = ImagesServiceFactory.makeCrop(0, 0, .10, .10);
Image newImage = imagesService.applyTransform(transform, oldImage);
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It appears I made have spoke to soon about loading the byte data in making
an image and using that to transform. I'm having a problem with cropping. It
crops but the image is funky colored.
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Another note:
You can use any pure java readers on the market due to dependencies:
http://code.google.com/appengine/forum/java-forum.html?place=topic%2Fgoogle-appengine-java%2F61pBMzfv7QU%2Fdiscussion
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Issue created:
http://code.google.com/p/googleappengine/issues/detail?id=2990&q=image%20service&colspec=ID%20Type%20Component%20Status%20Stars%20Summary%20Language%20Priority%20Owner%20Log
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Another thing you can't do with the image api. So far, I can't make an image
from byte data and resize it. Dang!
Transform resize = ImagesServiceFactory.makeResize(resizeWidth.intValue(),
resizeHeight.intValue());
oldImage = ImagesServiceFactory.makeImage(oldImage.getImageData());
Image new
Tiling an image, (mapping it) is a challenge with a percentage, due to
precision, or my perceived precision of division of the image. I figured out
a work around I think using different math to divide it up to have a precise
division that so no overlapping occurs. But to my point, I believe usin
Another image service request:
ImageServiceFactory.makeCrop(..) - uses percentage parameters. I'd like a
exact pixel (px) parameters.
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One more note:
It would be nice to watermark my images with the api.
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The image service has limitations. It won't allow to resize a width thats >
4000px. The image service is for light duty small images. The current
cameras on the market are producing very large images and scaling them is
trouble some. I have panoramic images, where the widths are gigantic and
th
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