[PerlChina] 关于GD画图的一个问题请教

#!D:/perl/bin/perl
    use GD;
    print "Content-type: image/png\n\n";

    # create a new image
    $im = new GD::Image(100,100);

    # allocate some colors
    $white = $im->colorAllocate(255,255,255);
    $black = $im->colorAllocate(0,0,0);      
    $red = $im->colorAllocate(255,0,0);     
    $blue = $im->colorAllocate(0,0,255);

    # make the background transparent and interlaced
    $im->transparent($white);
    $im->interlaced('true');

    # Put a black frame around the picture
    $im->rectangle(0,0,99,99,$black);

    # Draw a blue oval
    $im->arc(50,50,95,75,0,360,$blue);

    # And fill it with red
    $im->fill(50,50,$red);

    # make sure we are writing to a binary stream
    binmode STDOUT;

    # Convert the image to PNG and print it on standard output
    print $im->png;

 

 

上面是cpan上关于GD的一个例子，我想知道怎么样可以在同一个页面画2个或者n个这样的图，我想用循环实现，但是用for循环好像没有效果，请各位指教，谢谢

 

#!D:/perl/bin/perl
 use GD;
 print "Content-type: image/png\n\n";

 
 my $im = new GD::Image(1000,1000);
    my $white = $im->colorAllocate(255,255,255);
    my $black = $im->colorAllocate(0,0,0);      
    my $red = $im->colorAllocate(255,0,0);     
    my $blue = $im->colorAllocate(0,0,255);
    $im->transparent($white);
    $im->interlaced('true');

 for(my $i=0;$i<1000;$i=$i+100){

    # Put a black frame around the picture
    $im->rectangle($i,$i,$i+99,$i+99,$black);

    # make sure we are writing to a binary stream
    binmode STDOUT;

    # Convert the image to PNG and print it on standard output
    print $im->png;

 }

 

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