Php/docs/function.imagesetpixel
imagesetpixel
(PHP 4, PHP 5, PHP 7)
imagesetpixel — Set a single pixel
Description
imagesetpixel
( resource $image
, int $x
, int $y
, int $color
) : bool
imagesetpixel() draws a pixel at the specified coordinate.
Parameters
image- An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
x- x-coordinate.
y- y-coordinate.
color- A color identifier created with imagecolorallocate().
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 imagesetpixel() example
A random drawing that ends with a regular picture.
<?php$x = 200;$y = 200;$gd = imagecreatetruecolor($x, $y); $corners[0] = array('x' => 100, 'y' => 10);$corners[1] = array('x' => 0, 'y' => 190);$corners[2] = array('x' => 200, 'y' => 190);$red = imagecolorallocate($gd, 255, 0, 0); for ($i = 0; $i < 100000; $i++) { imagesetpixel($gd, round($x),round($y), $red); $a = rand(0, 2); $x = ($x + $corners[$a]['x']) / 2; $y = ($y + $corners[$a]['y']) / 2;} header('Content-Type: image/png');imagepng($gd);?>
The above example will output something similar to:
See Also
- imagecreatetruecolor() - Create a new true color image
- imagecolorallocate() - Allocate a color for an image
- imagecolorat() - Get the index of the color of a pixel
