Image

[mahesh_aquarius]

hello

im trying to clip an immuatable image for that i first converted it to mutable and displayed the mutable image to user also to get clipping area i display a cursor which is used to select coordinates by the user.
im getting to coordinates but the problem is in

getRGB method were im not getting expected image

g.drawRGB(pixels,x1,width,x1,y1,x2,y2,false);

pixels=original image int array

[jappit]

Hi,

as you can read in getRGB() method JavaDocs:

The returned values are not guaranteed to be identical to values from the original source, such as from createRGBImage or from a PNG image. Color values may be resampled to reflect the display capabilities of the device (for example, red, green or blue pixels may all be represented by the same gray value on a grayscale device).

So, there's no guarantee that retrieved pixels are the original ones.

Pit

[raj_J2ME]

Hi Mahesh,
Exactly no need for creating the mutable image in order to set the clip..Is this your requirement.If yes then please make it more clear what exactly you are looking for..

Thanks,

[mahesh_aquarius]

can u give me any alternative method for taking new coordinates and drawing the part of the image from the given coordinates

[mahesh_aquarius]

hi raj

can do the appl w/o converting immutable image to mutable one but i had to display cursor over it thats why converted it
now after getting 2 coordinated how to display the image for that 2 coordinates

[raj_J2ME]

Hi,
If I am wrong then make me correct...
You want to display the part of the image on given points...correct..

Thanks,

[mahesh_aquarius]

hi

yes you are right i want to display part of image with the given coordinates

[raj_J2ME]

Hi Mahesh,
I will give you an indea..ok
Take the X params array....right.
Take the Y params array....right.

Can you calculate the WIDTH and HEIGHT of the portion that will be displayed actually....
if not then
WIDTH = X2 - X1
HEIGHT = Y2 - Y1

(For the array you have to change this formula..)
then set Clip like this..

g.setClip(X[i),Y[i],WIDTH[i],HEIGHT[i]);
g.drawImage(image_x,image_y,Anchor)
g.setClip(0,0,SCREEN_WIDTH,SCREEN_HEIGHT)


Make sure that you do not need to touch the image..just draw the image once..and then you set the clip..

Hope this can help youu.
For more Query I will give you the code..tommarrow.
Thanks,

[mahesh_aquarius]

hey raj

given concept is not working can you elaborate the code in detail
if possible

thnks

[raj_J2ME]

Hi Mahesh,
Do you have the X and Y co-ordinates..
And you have the width and height of the piece of the image you want to draw..
Thanks,

[mahesh_aquarius]

hi raj

I am having new coordinates also i am having width and height of original image and for new image width=x2-x1 ,height=y2-y1

x1,x2,y1,y2 are my new coordinates from which i have to draw new image from original image

[raj_J2ME]

Mahesh,
Please read the demo and see how the clip() works,
http://www.java2s.com/Code/Java/J2ME/ClippingRegion.htm
Just check,
Thanks,

[mahesh_aquarius]

its not working as per my requirements

[raj_J2ME]

Well,
Write step by step..what you need to do with clip..just point by point..

[mahesh_aquarius]

im displaying an image on canvas
over the image im displaying a char "+" acts as cursors this can be move over the screen if user press fire key x and y coord are taken ......
so im taking 2 coord x1,y1 x2,y2 which is the clipping area
using this coord i want to clip the original image

this might clear the scenario now.....