Anybody?
On 13 abr, 12:03, qvark <[EMAIL PROTECTED]> wrote:
> Hello all, I have tobluran image and I have implemented my ownblur
> algorithm (gaussian), but it is too slow (I guess it is due to the
> emulator and the interpreted nature of the Dalvik VM).
>
> I have found the class android.graphics.BlurMaskFilter but I haven't
> been able to apply it successfully to an image (Bitmap).
>
> If I try something like:
>
> Paint blurPaint = new Paint();
> blurPaint.setFilterBitmap(true);
> blurPaint.setMaskFilter(new BlurMaskFilter(radius,
> BlurMaskFilter.Blur.NORMAL));
>
> Bitmap blurred = Bitmap.createBitmap(800, 600,
> Bitmap.Config.RGB_565);
> Canvas c = new Canvas(blurred);
> c.drawBitmap(originalBitmap, 0, 0, blurPaint);
>
> nothing happens (well, the borders of the image appear with shade,
> with seems normal, according to "Note: if the paint contains a
> maskfilter that generates a mask which extends beyond the bitmap's
> original width/height (e.g. BlurMaskFilter), then the bitmap will be
> drawn as if it were in a Shader with CLAMP mode. "
>
> But the image is not blurred!!
>
> I have tried a different approach passing the image to grey scale, the
> grey to the alpha channel (because there is only a extractAlpha()
> method that takes a Paint) and then:
>
> Bitmap blurredBitmap = bm.extractAlpha(blurPaint, new int[] {0, 0});
>
> But it makes the VM crash!! (seems like a bug inside the
> extractAlpha() method, because extractAlpha() without params also
> crash). It crashes when I use Bitmap.Config.ARGB_8888 or
> Bitmap.Config.ARGB_4444, but not if I use Bitmap.Config.RGB_565, but
> then obviously I lose the alpha information and the resulting bitmap
> is all black.
>
> Could anybody please provide a working example of blurring an image?
>
> Thanks in advance,
>
> Jose Luis.
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