ACC SHELL

<?php

define("PEREX_IMAGE_WIDTH", 150);		// default perex width
define("PEREX_IMAGE_HEIGHT", 120);		// default perex height
define("THUMB_MAX_WIDTH", 300);			// maximum width of the thumbnail
define("THUMB_MAX_HEIGHT", 300);		// maximum height of the thumbnail
define("IMAGE_MAX_WIDTH", 640);			// maximum width of the scaled-down image
define("IMAGE_MAX_HEIGHT", 640);			// maximum height of the scaled-down image

function open_image($filename)
{
	 $im = @imagecreatefromjpeg($filename);
     if($im !== false) 
     	return $im; 

     $im = @imagecreatefrompng($filename);
     if($im !== false)
     	return $im; 
     	
     $im = @imagecreatefromgif($filename);
     if($im !== false) 
     	return $im;
     	
     return false;
}

function clean_up($filename)
{
	
}

function resize_image($x1, $y1, $x2, $y2, $max_width, $max_height, &$image)
{
	$width = abs($x1 - $x2);
	$height = abs($y1 - $y2);
	
	// calculate the resulting image size
	$safety_break = 0;
	
	while(1)
	{
		// if the image is small enough in both coordinates, then break
		if($max_width / $width >= 1.0 && $max_height / $height >= 1.0)
			break;
			
		$coef = min($max_width / $width, $max_height / $height);
	
		// multiplying both coords by the same coef won't change aspect ratio	
		$width *= $coef;
		$height *= $coef;
		
		// just to make sure
		$safety_break++;
		if($safety_break > 2)
			die("Nepodarilo se spravne zmenit velikost obrazku");
	}
	
	// create the new image and resample it
	$new_image = imagecreatetruecolor($width, $height);
	
	imagecopyresampled(
		$new_image,
		$image,
		0, 0,
		min($x1, $x2), min($y1, $y2),
		$width, $height, 
		abs($x1 - $x2),
		abs($y1 - $y2)
	);
	
	return $new_image;		
}


function create_perex($x1, $y1, $x2, $y2)
{
	if(abs($x1 - $x2) < 3 || abs($y1 - $y2) < 3)
	{
		admin_msgbox("Výběr pro perex byl příliš malý, není možné pokračovat");
		die();
	}
	
	$perex_image = imagecreatetruecolor(PEREX_IMAGE_WIDTH, PEREX_IMAGE_HEIGHT);
	
	// load the original
	$preview = open_image("../gfx/temp/preview" . get_filename());
	$original = open_image("../gfx/temp/orig" . get_filename());
	
	$coef = imagesx($original) / imagesx($preview);
	
	$preview = NULL;
	
	$x1 *= $coef;
	$y1 *= $coef;
	$x2 *= $coef;
	$y2 *= $coef;
	
	imagecopyresampled(
		$perex_image,
		$original,
		0, 0, 		// dest top left corner
		min($x1, $x2), min($y1, $y2),		// source top left corner
		PEREX_IMAGE_WIDTH, PEREX_IMAGE_HEIGHT,				 	// dest size
		abs($x1 - $x2), abs($y1 - $y2)
	);
	
	imagejpeg($perex_image, "../gfx/temp/" . get_filename() . "_perex.jpg");
}

function crop_image($x1, $y1, $x2, $y2)
{
	
	// load the original
		
	$preview = open_image("../gfx/temp/preview" . get_filename());
	$original = open_image("../gfx/temp/orig" . get_filename());
	
	$coef = imagesx($original) / imagesx($preview);
	
	// handle some of the degenerate cases (handles the -1,-1,-1,-1 case as well)
	if(abs($x1 - $x2) < 3 || abs($y1 - $y2) < 3 )
	{
		admin_display_warning("Výběr je příliš malý nebo nebyl vůbec aplikován, obrázek si zachová svojí původní velikost");
		$x1 = $y1 = 0;
		$x2 = imagesx($original);
		$y2 = imagesy($original);
		
		// the user didn't choose, no scaling to be done
		$coef = 1.0;
	}
	
	$preview = NULL;
	
	$x1 *= $coef;
	$y1 *= $coef;
	$x2 *= $coef;
	$y2 *= $coef;
	

	// create the cropped picture	
	$cropped = imagecreatetruecolor(abs($x2 - $x1), abs($y2 - $y1));
		
	imagecopyresampled(
		$cropped,
		$original,
		0, 0, 							// dest to
		min($x1, $x2), min($y1, $y2),	// src from
		abs($x2 - $x1), abs($y2 - $y1),	// dest size
		abs($x2 - $x1), abs($y2 - $y1)	// src size
	);
	
	//imagejpeg($cropped, "../gfx/temp/cropped.jpg");
	
	$original = NULL;
		
	// create thumb from cropped
	$thumb = resize_image(
		0, 0,
		imagesx($cropped), imagesy($cropped),
		THUMB_MAX_WIDTH,
		THUMB_MAX_HEIGHT,
		$cropped
	);
	
	imagejpeg($thumb, "../gfx/temp/" . get_filename() . "_thumb.jpg");
	
	// create smaller image from cropped
	$smaller = resize_image(
		0, 0,
		imagesx($cropped), imagesy($cropped),
		IMAGE_MAX_WIDTH,
		IMAGE_MAX_HEIGHT,
		$cropped
	);
	
	imagejpeg($smaller, "../gfx/temp/" . get_filename() . ".jpg");
}



?>