troubleshooting Question

Set and get pixel class.

Avatar of Unimatrix_001
Unimatrix_001Flag for United Kingdom of Great Britain and Northern Ireland asked on
Java
5 Comments1 Solution556 ViewsLast Modified:
Hi,

I'm trying to create a simple class that I can initialise with an image, perform set and get operations on a per pixel basis then call another method and get the new image. I've got something along the lines of:



      class Pixelator{
      
            private Image image;
            private int rows;
            private int columns;
            private int pixels[];
            private PixelGrabber pixelGrabber;
            
            public boolean setImage(Image aImage){
                  image=aImage;
                  
                  rows=image.getHeight(null);
                  columns=image.getWidth(null);
                  pixels=new int[rows*columns];
                  pixelGrabber=new PixelGrabber(image, 0, 0, columns, rows, pixels, 0, columns);
                  try{ pixelGrabber.grabPixels(); }catch(Exception e){return false;}
                  
                  return true;
            }
                        
            public Image getImage(){
                  return Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(columns, rows, pixels, 0, columns));
            }
            
            public void setPixel(int x, int y, int red, int green, int blue){
                  int singlePix[]=new int[1];
                  singlePix[0]=(1<<24)+(red<<16)+(green<<8)+blue;
                  pixelGrabber.setPixels(1, 1, 1, 1, pixelGrabber.getColorModel(), singlePix, 0, 0);
            }
            
            public int getPixelRed(int x, int y){
                  int singlePix=pixels[y*columns+x];
                  return (singlePix>>16)&0xff;
            }
            
            public int getPixelGreen(int x, int y){
                  int singlePix=pixels[y*columns+x];
                  return (singlePix>>8)&0xff;
            }
            
            public int getPixelBlue(int x, int y){
                  int singlePix=pixels[y*columns+x];
                  return (singlePix)&0xff;
            }
            
      }


However it doesn't seem to be working. Can anybody please have a play around and see what's up with it?

Much appreciated!
Uni
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