comparing colors

[coffeyesplease]

i i've just started using nokia's extensions for midp, and there are some things that i'm not getting.
for example the DirectGraphics, in my paint method i have something like this, in the very end

public void paint(Graphics g){
........
offScreen = DirectUtils.getDirectGraphics(g);
}
then later on my have one of the most requested methods in the whole app

public boolean hasHit(int posX, posY){
int[] pixels = new int[20];
int format = offScreen.getNativePixelFormat();
offScreen.getPixels(pixels, 0,0,posX,posY,1,20, format);
for(int i = 0; i < pixels.length; i++){
if(pixels[i] != GAME_BLUE){
hasHit = true;
}
}

and this is simply not working, more likely because of something i'm doing wrong, but just can't see what.
my intention is to get a heigth 20 verical line with 1 width, and to check the values in it.
but i when i look into the array, i only see zero's.
and another thing, how do i transform 0x05143F into TYPE_USHORT_4444_ARGB;
thanks in advance for your time
wills

[artkim]

Hi,

I dont think you should do you collision detecion this way, i think it will be to slow.

But also, the getPixels needs to have a scanlength which you should set to 1 as you are get'ing a 1 pixel wide area from the screen.

so offScreen.getPixels( pixels, 0, 1, posX, posY, 1, 20, format); might help.

but it think it would be best to do the collision detection by not checking the pixels.

to "transform 0x05143F" to the TYPE_USHORT_4444_ARGB format you can do the following;
int blue = 0x05143F & 0x0000FF;
int green = (0x05143F & 0x00FF00)>>8;
int red = (0x05143F & 0xFF0000)>>16;
int newShort = 0xF000 | ((red>>4)<<8) | ((greeb>>4)<<4) | (blue>>4);

something like that