<?php
/*
   ----------------------------------------------------------------
   banner.php

   generates a banner out of random images. 	  
   
   By Craig Eisler 03/24/06
   
   You may copy and modify this code, but may not delete the attribution.
  
   ----------------------------------------------------------------
 */
include 'picture_common.php';


/*
 * MakeThumbnail
 *
 * build a thumbnail of a file with a specified width
 */
function MakeThumbnail( $image_url, $target_height = 90 ) 
{
	
	/*
	 * get the image
	 */
    $original_image = imageCreateFromJPEG($image_url) ;
	$original_width = imagesx( $original_image );
	$original_height = imagesy( $original_image );

	/*
	 * don't scale up!
	 */
	if( $original_height < $target_height )
	{
		return $original_image;
	}
		
	/*
	 * scale down the image
	 */
	$target_width = round( $original_width * $target_height / $original_height ) ; 
	$tmp_image = imageCreateTrueColor( $target_width,$target_height );
		
	imageCopyResampled( $tmp_image, $original_image, 0, 0, 0, 0, $target_width, $target_height, $original_width, $original_height );
		
	imageDestroy( $original_image );

	return $tmp_image;
		
} /* MakeThumbnail */

/*
 * prepare to spew image header
 */
header("Content-type: image/jpeg");

/*
 * get the image info
 *
 * variables: height, width, filename, quality, r, g, b, fontsize, fontname
 */
reset($HTTP_GET_VARS); 
$height = (int) $HTTP_GET_VARS['height'];
if( $height == 0 )
{
	$height = 90;
}
$width = (int) $HTTP_GET_VARS['width'];
if( $width == 0 )
{
	$width = 902;
}
$filename = $HTTP_GET_VARS['filename'];
if( $filename == "" )
{
	$filename = "newlogo.jpg";
}
$quality = (int) $HTTP_GET_VARS['quality'];
if( $quality == 0 )
{
	$quality = 90;
}
$r = (int) $HTTP_GET_VARS['r'];
$g = (int) $HTTP_GET_VARS['g'];
$b = (int) $HTTP_GET_VARS['b'];
if( $r == 0 && $g == 0 && $b == 0 )
{
	$r = 255;
	$g = 255;
	$b = 255;
}

$fontsize = (int) $HTTP_GET_VARS['fontsize'];
if( $fontsize == 0 )
{
	$fontsize = 20;
}

$fontname = $HTTP_GET_VARS['fontname'];
if( $fontname == "" )
{
	$fontname = "comic";
}
$font = '/fonts/'  . $fontname . '.ttf';



/* 
 * generate the individual thumbnails
 */
global $szKeyWords;
$file = "http://www.theeislers.com/picturelist.txt";
$szKeywords =  GetFileData( $file );
$imagecount = 0;
$images[0] = NULL;
$totalwidth = 0;

while( 1 )
{
    /*
     * find a random directory
     */
	$cnt = (int) $entries- 1;
	$index = randNum( 0, $cnt );
	$a = $szKeywords[$index];
	$dir = $a[DIRECTORY];
	$url = $a[URL];
	$title = $a[TITLE];
	$path = sprintf( "%s/images", $dir );

    /* 
     * get a random file from that directory
     */
	$files = GetDirContents( $path );
	$numfiles = count( $files );
	$numfiles = $numfiles-1;
	$file_index = randNum( 0,$numfiles );
    $url .= $files[$file_index];

    /*
     * get a thumbnail of that random file file
     */
    $images[$imagecount] = makeThumbnail($url, $height );

    /*
     * once we have enough pixels to make a full image, quit
     */
	$totalwidth += imagesx( $images[$imagecount] );
    $imagecount++;
    if( $totalwidth  >= $width )
    {
    	break;
    }
    if( $imagecount > 99 )  // bug trapper
    {
		break;
    }
    
} /* while */

/*
 * compute what we need to trim from each image
 */
$tmp = $totalwidth-$width;
$trim = floor( $tmp/$imagecount );
$trim_left = floor( $trim/2 );
$trim_right = $trim-$trim_left;
 
/*
 * now paste them all together
 */
$image = imagecreatetruecolor($width, $height);
$x = 0;
for( $i=0; $i<$imagecount; $i++ )
{
	$im = $images[$i];
	$im_width = imagesx( $im );
	//bool imagecopy ( resource dst_im, resource src_im, int dst_x, int dst_y, int src_x, int src_y, int src_w, int src_h )
	imagecopy( $image, $im, $x, 0, $trim_left, 0, $im_width-$trim, $height );
	imageDestroy( $im );

	$x = $x + $im_width - $trim; 
	
} /* for */

/*
 * add the text
 */
$text = "ANGUS AND DUNCAN'S EXCELLENT ADVENTURE";
$text_color = imagecolorallocate( $image, $r, $g, $b);

$bbox = imageftbbox( $fontsize, 0, $font, $text, array("linespacing" => 1) );
$text_width = abs($bbox[0]) + abs($bbox[2]); // distance from left to right
$text_height = abs($bbox[1]) + abs($bbox[5]); // distance from top to bottom
$text_x = floor( ($width - $text_width) / 2 );   
$text_y = floor( ($height - $text_height) / 2 + $text_height);
imagettftext( $image, $fontsize, 0, $text_x, $text_y, $text_color, $font, $text );

/*
 * write the image
 */
imagejpeg( $image, $filename, $quality );
imagejpeg( $image, "", $quality );
imageDestroy( $image );

?>