<?php
/* PIMG module: represents a single pixel from the image */
class pimg_pixel
{
/* Resources */
private $pimg;
private $x;
private $y;
private $color;
// PIMG constructor
function __construct($pimg)
{
$this -> pimg = $pimg;
}
/*
Sets pixel properties
@param: $x - the x position in the image
@param: $y - the y position in the image
@param: $color - a valid pimg_color resource
*/
function init($x, $y, $color)
{
/* INPUT VALIDATORS */
if ($x < 0)
{
$x = 0;
$this -> pimg -> setDebug('X position must be >= 0, using 0 as default', 'notice', __CLASS__);
}
if ($y < 0)
{
$y = 0;
$this -> pimg -> setDebug('Y position must be >= 0, using 0 as default', 'notice', __CLASS__);
}
if (!$color instanceOf pimg_color)
$this -> pimg -> setDebug('Passed color is not a valid pimg_color instance', 'error', __CLASS__);
// Set pixel properties
$this -> x = $x;
$this -> y = $y;
$this -> color = $color;
// Return an instance of the class
return $this;
}
/*
If the user wants to view the pixel info for debugging this method will return a string representation of it
@result: string info
*/
function __toString()
{
return 'x: ' . $this -> x . ', y: ' . $this -> y . ', color: [ ' . $this -> color . ' ]';
}
/*
Sets or gets the x value
@param: $x
@result: hande of the class or x value
*/
public function x($x = null)
{
if (isset($x))
{
$this -> x = $x;
return $this;
}
else
return $this -> x;
}
/*
Sets or gets the y value
@param: $y
@result: hande of the class or y value
*/
public function y($y = null)
{
if (isset($y))
{
$this -> y = $y;
return $this;
}
else
return $this -> y;
}
/*
Sets or gets the color value
@param: $color
@result: hande of the class or hande of pimg_color representing pixel's color
*/
public function color($color = null)
{
if (isset($color))
{
$this -> color = $color;
return $this;
}
else
return $this -> color;
}
/*
Draws the pixel to the parent pimg image or the given pimg image
@result: handle of the pimg class
*/
public function draw($pimg = null)
{
// Draw the pixel
$pimg = (empty($pimg)) ? $this -> pimg : $pimg;
imagesetpixel($pimg -> handle(), $this -> x, $this -> y, $this -> color -> allocate());
// Return handle of the class
return $pimg;
}
}
?>
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