bekgram/process.php at master · reibengu/bekgram · GitHub

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<?php

$images = array('coffee.jpg', 'bicycle.jpg', 'girl.jpg', 'dusk.jpg', 'dog.jpg', 'hero.jpg', 'guitar.jpg');

if ($_GET['image'] && $_GET['filter']) {
	$id = substr($_GET['image'], 5, 1);
	if (isset($images[$id])) {
		gd_filter_image('images/' . $images[$id], $_GET['filter']);
	}
}

function gd_filter_image($image_path, $filter_name)
{
	$filter = 'gd_filter_' . $filter_name;
	if (function_exists($filter)) {
		list($width, $height) = getimagesize($image_path);

		$im = imagecreatetruecolor($width, $height);
		$src = imagecreatefromjpeg($image_path);
		imagecopyresampled($im, $src, 0, 0, 0, 0, $width, $height, $width, $height);

		$im = $filter($im);

		header('Content-type: image/jpeg');
		imagejpeg($im, null, 100);
		imagedestroy($im);
		imagedestroy($src);
	}
}

function gd_filter_dreamy($im)
{
	imagefilter($im, IMG_FILTER_BRIGHTNESS, 20);
	imagefilter($im, IMG_FILTER_CONTRAST, -35);
	imagefilter($im, IMG_FILTER_COLORIZE, 60, -10, 35);
	imagefilter($im, IMG_FILTER_SMOOTH, 7);
	$im = gd_apply_overlay($im, 'scratch', 10);
	$im = gd_apply_overlay($im, 'vignette', 100);
	return $im;
}

function gd_filter_velvet($im)
{
	imagefilter($im, IMG_FILTER_BRIGHTNESS, 5);
	imagefilter($im, IMG_FILTER_CONTRAST, -25);
	imagefilter($im, IMG_FILTER_COLORIZE, -10, 45, 65);
	$im = gd_apply_overlay($im, 'noise', 45);
	$im = gd_apply_overlay($im, 'vignette', 100);
	return $im;
}

function gd_filter_chrome($im)
{
	imagefilter($im, IMG_FILTER_BRIGHTNESS, 15);
	imagefilter($im, IMG_FILTER_CONTRAST, -15);
	imagefilter($im, IMG_FILTER_COLORIZE, -5, -10, -15);
	$im = gd_apply_overlay($im, 'noise', 45);
	$im = gd_apply_overlay($im, 'vignette', 100);
	return $im;
}

function gd_filter_lift($im)
{
	imagefilter($im, IMG_FILTER_BRIGHTNESS, 50);
	imagefilter($im, IMG_FILTER_CONTRAST, -25);
	imagefilter($im, IMG_FILTER_COLORIZE, 75, 0, 25);
	$im = gd_apply_overlay($im, 'emulsion', 100);
	return $im;
}

function gd_filter_canvas($im)
{
	imagefilter($im, IMG_FILTER_BRIGHTNESS, 25);
	imagefilter($im, IMG_FILTER_CONTRAST, -25);
	imagefilter($im, IMG_FILTER_COLORIZE, 50, 25, -35);
	$im = gd_apply_overlay($im, 'canvas', 100);
	return $im;
}

function gd_filter_vintage($im)
{
	imagefilter($im, IMG_FILTER_BRIGHTNESS, 15);
	imagefilter($im, IMG_FILTER_CONTRAST, -25);
	imagefilter($im, IMG_FILTER_COLORIZE, -10, -5, -15);
	imagefilter($im, IMG_FILTER_SMOOTH, 7);
	$im = gd_apply_overlay($im, 'scratch', 7);
	return $im;
}

function gd_filter_monopin($im)
{
	imagefilter($im, IMG_FILTER_GRAYSCALE);
	imagefilter($im, IMG_FILTER_BRIGHTNESS, -15);
	imagefilter($im, IMG_FILTER_CONTRAST, -15);
	$im = gd_apply_overlay($im, 'vignette', 100);
	return $im;
}

function gd_filter_antique($im)
{
	imagefilter($im, IMG_FILTER_BRIGHTNESS, 0);
	imagefilter($im, IMG_FILTER_CONTRAST, -30);
	imagefilter($im, IMG_FILTER_COLORIZE, 75, 50, 25);
	return $im;
}

function gd_filter_blackwhite($im)
{
	imagefilter($im, IMG_FILTER_GRAYSCALE);
	imagefilter($im, IMG_FILTER_BRIGHTNESS, 10);
	imagefilter($im, IMG_FILTER_CONTRAST, -20);
	return $im;
}

function gd_filter_boost($im)
{
	imagefilter($im, IMG_FILTER_CONTRAST, -35);
	imagefilter($im, IMG_FILTER_COLORIZE, 25, 25, 25);
	return $im;
}

function gd_filter_sepia($im)
{
	imagefilter($im, IMG_FILTER_GRAYSCALE);
	imagefilter($im, IMG_FILTER_BRIGHTNESS, -10);
	imagefilter($im, IMG_FILTER_CONTRAST, -20);
	imagefilter($im, IMG_FILTER_COLORIZE, 60, 30, -15);
	return $im;
}

function gd_filter_blur($im)
{
	imagefilter($im, IMG_FILTER_SELECTIVE_BLUR);
	imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR);
	imagefilter($im, IMG_FILTER_CONTRAST, -15);
	imagefilter($im, IMG_FILTER_SMOOTH, -2);
	return $im;
}

function gd_apply_overlay($im, $type, $amount)
{
	$width = imagesx($im);
	$height = imagesy($im);
	$filter = imagecreatetruecolor($width, $height);

	imagealphablending($filter, false);
	imagesavealpha($filter, true);

	$transparent = imagecolorallocatealpha($filter, 255, 255, 255, 127);
	imagefilledrectangle($filter, 0, 0, $width, $height, $transparent);

	$overlay = 'filters/' . $type . '.png';
	$png = imagecreatefrompng($overlay);
	imagecopyresampled($filter, $png, 0, 0, 0, 0, $width, $height, $width, $height);

	$comp = imagecreatetruecolor($width, $height);
	imagecopy($comp, $im, 0, 0, 0, 0, $width, $height);
	imagecopy($comp, $filter, 0, 0, 0, 0, $width, $height);
	imagecopymerge($im, $comp, 0, 0, 0, 0, $width, $height, $amount);

	imagedestroy($comp);
	return $im;
}