Zooming in and Zooming out of Images

[nicenouman]

hi guys

i need some help out here. i have an image of size 600x800 i have manage to get it into byte array using file connection api. i am using nokia 6680 and problem is it only displays image with maximum size of 256x256. this means i need to include Zoom in and Out Functionality. can abody give me some advice how i can do that. i am using cldc 1.1 and MIDP 2.0
any kind of code, advice will be appreciated.

[jini_1]

hi
Hope that this will help u

public Image createThumbnail(Image image, int thumbWidth,
int thumbHeight) {
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();

if (thumbHeight == -1)
thumbHeight = thumbWidth * sourceHeight / sourceWidth;

Image thumb = Image.createImage(thumbWidth, thumbHeight);
Graphics g = thumb.getGraphics();

for (int y = 0; y < thumbHeight; y++) {
for (int x = 0; x < thumbWidth; x++) {
g.setClip(x, y, 1, 1);
int dx = x * sourceWidth / thumbWidth;
int dy = y * sourceHeight / thumbHeight;
g
.drawImage(image, x - dx, y - dy, Graphics.LEFT
| Graphics.TOP);
}
}

Image immutableThumb = Image.createImage(thumb);

return immutableThumb;
}

jini

[nicenouman]

thanx pal that did help. but i have another problem. i am facing a problem that i need to give zoom in and zoom out options. when from thumb nail image i zoom in to lets say 100 percent then the mobile doesnt dispalay my image. this is probably because mobile only display images upto 255x255.
and form.append(ImageItem)
where ImageItem is representing my image.

Now if u could please tell me how can i display an image which is bigger then mobile screen size. i have a 600x800 size image. do i need to create a some special canvas and any other things.
how can i manage an image bigger then mobile screen size

[jini_1]

hi

Image scrolling sample

http://www.microjava.com/developer/f...ontent_id=1835

jini

[nicenouman]

does anyone has an idea how photo editor is handling images. i know its a long shot. but whats wrong in askin

[juarezjunior]

Hi Nouman,

Check this link:

http://www.java-tips.org/java-me-tip...-zoom-out.html

I have not tested it, though.

I hope this helps!

Juarez Junior

[shmoove]

And if you want smoother (but slower and more memory consuming) scaling you can base your code on this.

shmoove

[nicenouman]

thanx guys for all of ur help.

i have manage to display a thumbnail image. thanks for the code above and then zoom it again thanx for the code. but i have a problem. there is a vertical scroll which are shown by the small arrows for up and down which works fine. but my image also needs a horizontal scroll to move left and right but they arent been shown does. anybody know how i can do that?