J2ME - zoom in

Hi,

To zoom follow the following procedure

1) Get the RGB data of image.

2) According to zooming factors(x and y) copy the number of pixels

down and horrizontally

3) Then from this create a new image which is zoomed image

following is the code I have tried which is possible in MIDP2.0 in

MIDP1.0 you have to use another APIs to get the RGB data of Image

public static Image zoomImage(Image Img,int ZoomFactor)

{

ImgHeight=Img.getHeight();

ImgWidth=Img.getWidth();

ImgRGBdata=new int[ImgWidth*ImgHeight];

NewImgRGBdata=new int[(ImgWidth*ZoomFactor)*(ImgHeight*ZoomFactor)];

Img.getRGB(ImgRGBdata,0,ImgWidth,0,0,ImgWidth,ImgHeight);

//System.out.println("length"+ImgRGBdata.length);

//System.out.println(ImgHeight);

//System.out.println(ImgWidth);

//System.out.println(ZoomFactor);

//System.out.println(ImgRGBdata.length);

//System.out.println(NewImgRGBdata.length);

int j=0;

if(ZoomFactor<=1)

return Img;

for(int i=0;i<ImgRGBdata.length;i++)

{

for(int k=0;k<ZoomFactor;k++)

{

NewImgRGBdata[j]=ImgRGBdata[i];

j++;

}

if(j%(ImgWidth*ZoomFactor)==0)

{

for(int l=0;l<(ImgWidth*ZoomFactor);l++)

{

for(int m=0;m<(ZoomFactor-1);m++)

{

NewImgRGBdata[j]=NewImgRGBdata[j-(ImgWidth*ZoomFactor)];

j++;

}

}

}

}

//for(int i=0;i<NewImgRGBdata.length;i++)

//System.out.println(i+1+" "+NewImgRGBdata[i]);

//

ZoomedImg=Image.createRGBImage(NewImgRGBdata,(ImgWidth*ZoomFactor),(ImgHeight*ZoomFactor),true);

return ZoomedImg;

}

@rjun

>

arjunamatea at 2007-7-14 21:18:27 >

what is zoomingFactor value, Image memory size and image type. If image size is very large and you again zoom it then it can give heapsize proble or execution will hang

first just try with small images if it runs fine then there is no fault in code otherwise i will again check the code

@rjun

arjunamatea at 2007-7-14 21:18:28 >