Thanks for the fast response. I can't seem to saw the changes made by the
canvas in the original bitmap, my code is as follows;
int old = input.getPixel(0, 0);
Canvas c = new Canvas(input);
c.drawARGB(a, r, g, b);
int n = input.getPixel(0, 0);
if(old==n)
Log.e(TAG, "Values didn't change!"); // Fires
return input;
'input' is mutable but the returned bitmap retains it's old values. The
'clip' Rect is the size of the bitmap.
Do you know why this is the case?
I'm looking for a finalize or save on the canvas but they don't seem to do
the job.
Kind regards,
Gav
On Thu, May 28, 2009 at 5:19 PM, Streets Of Boston
<flyingdutc...@gmail.com>wrote:
>
> - Create a mutable bitmap from immutable. But instead of a copy, just
> create an empty one with the same width and height as the original
> one.
> - Create a canvas from this mutable bitmap (new Canvas(mutable));
> - Create a ColorFilter object. Set its saturation to 0 (this is one
> way of doing this).
> (ColorMatrixColorFilter with a ColorMatrix whose saturation is set
> to 0).
> - Create a new Paint object and set its color-filter to the
> ColorMatrixColorFilter (bwPaint).
> - Draw the original bitmap onto the new canvas:
> mutableCanvas.drawBitmap(immutable, 0, 0, bwPaint);
> - After this drawBitmap call, the mutable bitmap contains a b&w
> version of your original mutable bitmap.
>
> On May 28, 12:00 pm, Gavin Aiken <gavin.ai...@imperial.ac.uk> wrote:
> > Hi Marco,
> >
> > Would you mind giving a brief code snippet of how this might work? I've
> been
> > trying to get a similar function to run faster but when I use the bitmap
> the
> > values I thought were written by the canvas aren't there.
> >
> > Kind regards,
> >
> > Gav
> >
> > On Tue, Apr 21, 2009 at 12:21 AM, Marco Nelissen <marc...@android.com
> >wrote:
> >
> >
> >
> > > You can do this more efficiently by using a Paint and a ColorFilter.
> >
> > > On Mon, Apr 20, 2009 at 3:59 PM, sm12 <mata...@gmail.com> wrote:
> >
> > >> Solved. The problem was in the parameters of Color.rgb.- Hide quoted
> text -
> >
> > - Show quoted text -
> >
>
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