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Groups > comp.lang.java.programmer > #36509

Re: BufferedImage and int[] array

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On Friday, April 21, 2017 at 4:54:43 PM UTC-4, Eric Douglas wrote:
> On Friday, April 21, 2017 at 4:37:47 PM UTC-4, Rick C. Hodgin wrote:
> > That code was all written last night and when I ran into the issue
> > with reading in a transparent enabled PNG file and it losing the
> > alpha channel I sort of stopped.
> > 
> > The algorithm is inverting the color.  This line reverses the color
> > of each pixel color channel:
> > 
> 
> I believe I did figure out the invert was trying to invert the colors not the horizontal.  Change the pixels line in the invert to pass the actual alpha:
> pixels[offset] = rgba(255 - red, 255 - grn, 255 - blu, (rgba & 0xff000000) >> 24);
> 
> Then change the rgba method to just add them.
> return(red + (grn << 8) + (blu << 16) + (alp << 24));

LOL!  Well, they should be OR operations, not AND:

    return (red | (grn << 8) | (blu << 16) | <alp << 24);

I code like that all of the time.  I know what I'm intending, but it
literally gets translated out of my fingers differently than what's
in my mind.  It's very frustrating at times.  A symptom of dylsexia
and the associated family of the spectrum. :-)

Thank you,
Rick C. Hodgin

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BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-21 08:28 -0700
  Re: BufferedImage and int[] array Eric Douglas <e.d.programmer@gmail.com> - 2017-04-21 08:54 -0700
    Re: BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-21 09:03 -0700
      Re: BufferedImage and int[] array Eric Douglas <e.d.programmer@gmail.com> - 2017-04-21 10:41 -0700
        Re: BufferedImage and int[] array Eric Douglas <e.d.programmer@gmail.com> - 2017-04-21 10:46 -0700
        Re: BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-21 11:13 -0700
          Re: BufferedImage and int[] array Eric Douglas <e.d.programmer@gmail.com> - 2017-04-21 12:12 -0700
          Re: BufferedImage and int[] array Eric Douglas <e.d.programmer@gmail.com> - 2017-04-21 13:24 -0700
            Re: BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-21 13:37 -0700
              Re: BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-21 13:40 -0700
              Re: BufferedImage and int[] array Eric Douglas <e.d.programmer@gmail.com> - 2017-04-21 13:54 -0700
                Re: BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-21 13:59 -0700
              Re: BufferedImage and int[] array Eric Douglas <e.d.programmer@gmail.com> - 2017-04-21 13:58 -0700
                Re: BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-21 14:06 -0700
  Re: BufferedImage and int[] array Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2017-04-22 11:28 -0500
    Re: BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-24 07:33 -0700
      Re: BufferedImage and int[] array Eric Douglas <e.d.programmer@gmail.com> - 2017-04-24 08:04 -0700
    Re: BufferedImage and int[] array "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-04-24 08:17 -0700
      Re: BufferedImage and int[] array Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2017-04-24 11:25 -0500

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