<?php
/**
?* gd image mask
?*
?* @copyright ugia.cn
?
?*/
function imagemask(&$im, $x1, $y1, $x2, $y2, $deep)
{
??? for($x = $x1; $x < $x2; $x += $deep)
??? {
??????? for ($y = $y1; $y < $y2; $y += $deep)
??????? {
??????????? $color = imagecolorat ($im, $x + round($deep / 2), $y + round($deep / 2));
??????????? imagefilledrectangle ($im, $x, $y, $x + $deep, $y + $deep, $color);
??????? }
??? }
}
//馬賽克用法示例：
header("content-type: image/png");
$im = imagecreatefromjpeg("test.jpg");
imagemask($im, 57, 22, 103, 40, 8);
imagepng($im);
imagedestroy($im);
?>

<?php
/**
?* gd image text outer
?*
?* @copyright ugia.cn
?
?*/
function imagetextouter(&$im, $size, $x, $y, $color, $fontfile, $text, $outer)
{
??? if (!function_exists('imagecolorallocatehex'))
??? {
??????? function imagecolorallocatehex($im, $s)
??????? {
?????????? if($s{0} == "#") $s = substr($s,1);
?????????? $bg_dec = hexdec($s);
?????????? return imagecolorallocate($im,
?????????????????????? ($bg_dec & 0xff0000) >> 16,
?????????????????????? ($bg_dec & 0x00ff00) >>? 8,
?????????????????????? ($bg_dec & 0x0000ff)
?????????????????????? );
??????? }
??? }
??? $ttf = false;
??? if (is_file($fontfile))
??? {
??????? $ttf = true;
??????? $area = imagettfbbox($size, $angle, $fontfile, $text);
??????? $width? = $area[2] - $area[0] + 2;
??????? $height = $area[1] - $area[5] + 2;
??? }
??? else
??? {
??????? $width? = strlen($text) * 10;
??????? $height = 16;
??? }
??? $im_tmp = imagecreate($width, $height);
??? $white = imagecolorallocate($im_tmp, 255, 255, 255);
??? $black = imagecolorallocate($im_tmp, 0, 0, 0);
??? $color = imagecolorallocatehex($im, $color);
??? $outer = imagecolorallocatehex($im, $outer);
??? if ($ttf)
??? {
??????? imagettftext($im_tmp, $size, 0, 0, $height - 2, $black, $fontfile, $text);
??????? imagettftext($im, $size, 0, $x, $y, $color, $fontfile, $text);
??????? $y = $y - $height + 2;
??? }
??? else
??? {
??????? imagestring($im_tmp, $size, 0, 0, $text, $black);
??????? imagestring($im, $size, $x, $y, $text, $color);
??? }
??? for ($i = 0; $i < $width; $i ++)
??? {
??????? for ($j = 0; $j < $height; $j ++)
??????? {
??????????? $c = imagecolorat($im_tmp, $i, $j);
??????????? if ($c !== $white)
??????????? {
??????????????? imagecolorat ($im_tmp, $i, $j - 1) != $white || imagesetpixel($im, $x + $i, $y + $j - 1, $outer);
??????????????? imagecolorat ($im_tmp, $i, $j + 1) != $white || imagesetpixel($im, $x + $i, $y + $j + 1, $outer);
??????????????? imagecolorat ($im_tmp, $i - 1, $j) != $white || imagesetpixel($im, $x + $i - 1, $y + $j, $outer);
??????????????? imagecolorat ($im_tmp, $i + 1, $j) != $white || imagesetpixel($im, $x + $i + 1, $y + $j, $outer);
??????????????? // 取消注釋,與fireworks的發(fā)光效果相同
??????????????? /*
??????????????? imagecolorat ($im_tmp, $i - 1, $j - 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j - 1, $outer);
??????????????? imagecolorat ($im_tmp, $i + 1, $j - 1) != $white || imagesetpixel($im, $x + $i + 1, $y + $j - 1, $outer);
??????????????? imagecolorat ($im_tmp, $i - 1, $j + 1) != $white || imagesetpixel($im, $x + $i - 1, $y + $j + 1, $outer);
??????????????? imagecolorat ($im_tmp, $i + 1, $j + 1) != $white || imagesetpixel($im, $x + $i + 1, $y + $j + 1, $outer);
??????????????? */
??????????? }
??????? }
??? }
??? imagedestroy($im_tmp);
}

//用法示例：
header("content-type: image/png");
$im = imagecreatefromjpeg("bluesky.jpg");
$white = imagecolorallocate($im, 255,255,255);
imagetextouter($im, 9, 10, 20, '#000000', "simsun.ttc", '新年快樂', '#ffffff');
imagetextouter($im, 2, 10, 30, '#ffff00', "", 'hello, world!' , '#103993');
imagepng($im);
imagedestroy($im);
?>PHP教程