Unfortunately, using JsArrayInteger is very slow:
public byte[] getBitmap() {
// String str = getImageData(0, 0, width, height);
// byte[] ar = new byte[str.length()];
// for (int i=0; i<ar.length; i++)
// ar[i] = (byte)((int)str.charAt(i) & 0xff);
// return ar;
JsArrayInteger ja = getImageRawData(0, 0, width, height);
int len = ja.length();
byte[] ar = new byte[len];
for (int i=0; i<len; i++)
ar[i] = (byte)(ja.get(i) & 0xff);
return ar;
}
The loop above copying element to a byte array is 10 times above than the
commented codes. Anything doing wrong?
Kevin
On Wed, Mar 4, 2009 at 6:58 AM, Thomas Broyer <t.bro...@gmail.com> wrote:
>
>
> On 3 mar, 23:47, Kevin Tarn <kevn.t...@gmail.com> wrote:
> > Yes. That's what I like to do. Could you give an example of retreiving
> > canvas raw data by GWT instead of JSNI?
>
> Get our JSNI methods the shorter you can. Here, just make it get
> oData.data and return it as a JsArrayNumber; then do all the following
> in Java, with aImgData being the JsArrayNumber.
> My guess is that you could turn it directly to bytes as the array
> length could be computed early from width+height.
>
>
> >
>
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