Thanks for all replies.. By merge I mean adding, one image with
another.
Nithin
On Mar 16, 6:28 pm, Warren <warrenba...@gmail.com> wrote:
> I use something like the following function. It really depends what
> you mean by "merge". Do you mean average, alpha over, multiply, add,
> etc.?
> Anyway, you can change the arithmetic here to suit your needs. The
> important parts are that you copy the bitmap you wish to change so
> that you have a mutable/changeable bitmap, and that you call
> setPixel() to change the bitmap pixels to their new color.
>
> In this example, I'm looping over all the pixels and assuming both
> bitmaps are the same size.
>
> You can also do this with a canvas, but this approach is the most
> flexible. It is not terribly fast. I only use it at the startup of my
> program. But unless you are calling it repeatedly, it shouldn't slow
> you down too much.
>
> private static Bitmap applyMask(Bitmap tileBitmap, Bitmap maskBitmap)
> {
> Bitmap workingBitmap = tileBitmap.copy(bitmapConfig, true); //
> IMPORTANT
> int width = tileBitmap.getWidth();
> int height = tileBitmap.getHeight();
> for(int x=0; x<width; x++){
> for(int y=0; y<height; y++){
> int maskPixel = maskBitmap.getPixel(x, y);
> int tilePixel = tileBitmap.getPixel(x, y);
>
> //change this line for different color
> mixing types
> int newPixel = Color.argb(
> Color.red(maskPixel),
> Color.red(tilePixel), Color.green(tilePixel), Color.blue(tilePixel));
>
> workingBitmap.setPixel(x, y, newPixel);
> //IMPORTANT
> }
> }
> return workingBitmap;
> }
>
> On Mar 16, 1:08 am, NapoleonLiu <liuwa...@neusoft.com> wrote:
>
> > I am a new one in UI coding. So may be my way is not the best..
>
> > Panit mPaint = new Paint();
> > mPaint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
> > mPaint.setAlpha(XX);
> > notice that Mode.DST_IN is important(Better to see it's api-doc.)
> > Use this paint to draw a "ALPHA_8" bitmap on your org bitmap ,then you can
> > get a Bitmap which have special alpha.
> > So you can get two special alpha bitmap ,then draw them with Mode.DST_IN.
> > I think you will get you want.
> > But there must be a nice way, to do a calculation on the alpha area of
> > bitmap.
> > hope it can help you.
>
> > On Tue, 16 Mar 2010 13:20:01 +0800, BobG <bobgard...@aol.com> wrote:
> > > How about set the Alpha channel in each one to 50% so they are both
> > > half see through?
>
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