-
-
imagecolorsforindex() - imagecolorat()
- 在图片上画图形 $img=imagecreatefromgif("./images/map.gif");
/**
- * 图片锐化处理
- * edit by bbs.it-home.org
- */
- $red= imagecolorallocate($img, 255, 0, 0);
imageline($img, 0, 0, 100, 100, $red); - imageellipse($img, 200, 100, 100, 100, $red);
- imagegif($img, "./images/map2.gif");
- imagedestroy($img);
-
-
图片普通缩放
-
- function thumn($background, $width, $height, $newfile) {
- list($s_w, $s_h)=getimagesize($background);//获取原图片高度、宽度
- if ($width && ($s_w $width = ($height / $s_h) * $s_w;
- } else {
- $height = ($width / $s_w) * $s_h;
- }
- $new=imagecreatetruecolor($width, $height);
- $img=imagecreatefromjpeg($background);
- imagecopyresampled($new, $img, 0, 0, 0, 0, $width, $height, $s_w, $s_h);
- imagejpeg($new, $newfile);
- imagedestroy($new);
- imagedestroy($img);
- }
- thumn("images/hee.jpg", 200, 200, "./images/hee3.jpg");
gif透明色处理
-
-
/** - * 图片裁剪处理
- * edit by bbs.it-home.org
- */
function cut($background, $cut_x, $cut_y, $cut_width, $cut_height, $location){ - $back=imagecreatefromjpeg($background);
- $new=imagecreatetruecolor($cut_width, $cut_height);
- imagecopyresampled($new, $back, 0, 0, $cut_x, $cut_y, $cut_width, $cut_height,$cut_width,$cut_height);
- imagejpeg($new, $location);
- imagedestroy($new);
- imagedestroy($back);
- }
- cut("./images/hee.jpg", 440, 140, 117, 112, "./images/hee5.jpg");
- ?>
立即学习“PHP免费学习笔记（深入）”；
-
图片加水印 文字水印
-
-
/** - *
- * 图片添加文字水印
- */
function mark_text($background, $text, $x, $y){ - $back=imagecreatefromjpeg($background);
- $color=imagecolorallocate($back, 0, 255, 0);
- imagettftext($back, 20, 0, $x, $y, $color, "simkai.ttf", $text);
- imagejpeg($back, "./images/hee7.jpg");
- imagedestroy($back);
- }
- mark_text("./images/hee.jpg", "细说PHP", 150, 250);
- //图片水印
- function mark_pic($background, $waterpic, $x, $y){
- $back=imagecreatefromjpeg($background);
- $water=imagecreatefromgif($waterpic);
- $w_w=imagesx($water);
- $w_h=imagesy($water);
- imagecopy($back, $water, $x, $y, 0, 0, $w_w, $w_h);
- imagejpeg($back,"./images/hee8.jpg");
- imagedestroy($back);
- imagedestroy($water);
- }
- mark_pic("./images/hee.jpg", "./images/gaolf.gif", 50, 200);
-
图片旋转
-
-
/** - * 图片旋转
- * edit by bbs.it-home.org
- */
- $back=imagecreatefromjpeg("./images/hee.jpg");
$new=imagerotate($back, 45, 0); - imagejpeg($new, "./images/hee9.jpg");
- ?>
-
图片水平翻转垂直翻转
-
-
/** - * 图片水平翻转 垂直翻转
- * edit by bbs.it-home.org
- */
- function turn_y($background, $newfile){
$back=imagecreatefromjpeg($background); - $width=imagesx($back);
- $height=imagesy($back);
- $new=imagecreatetruecolor($width, $height);
- for($x=0; $x imagecopy($new, $back, $width-$x-1, 0, $x, 0, 1, $height);
- }
- imagejpeg($new, $newfile);
- imagedestroy($back);
- imagedestroy($new);
- }
- function turn_x($background, $newfile){
- $back=imagecreatefromjpeg($background);
- $width=imagesx($back);
- $height=imagesy($back);
- $new=imagecreatetruecolor($width, $height);
- for($y=0; $y imagecopy($new, $back,0, $height-$y-1, 0, $y, $width, 1);
- }
- imagejpeg($new, $newfile);
- imagedestroy($back);
- imagedestroy($new);
- }
- turn_y("./images/hee.jpg", "./images/hee11.jpg");
- turn_x("./images/hee.jpg", "./images/hee12.jpg");
- ?>
-
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