PHPの各種画像処理関数コードまとめ_PHPチュートリアル

$new=imagecreatetruecolor($n_w, $n_h);

$img=imagecreatefromjpeg($filename);
//画像の一部をコピーして調整します

imagecopyresize($new, $img,0, 0,0, 0,$n_w, $n_h, $width, $height);
//画像出力新しい画像、名前を付けて保存

imagejpeg($new, "./images/hee2.jpg");

imagedestroy($new);
imagedestroy($img);

if ($width && ($s_w < $s_h)) {
$width = ($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");

if ($width && ($s_w < $s_h)) {
$width = ($height / $s_h) * $s_w;
} else {
$height = ($width / $s_w) * $s_h;
}

$new=imagecreatetruecolor($width, $height);

$img=imagecreatefromgif($background);

$otsc=imagecolortransparent($img);
if($otsc >=0 && $otst < imagecolorstotal($img)){// インデックス色判断
$tran=imagecolorsforindex($img, $otsc);/ /インデックス颜色值

$newt=imagecolorallocate($new, $tran["red"], $tran["green"], $tran["blue"]);

imagefill($new, 0, 0, $newt);

imagecolortransparent($new, $newt);
}

imagecopyresize($new, $img, 0, 0, 0, 0, $width, $height, $s_w, $s_h);

imagegif($new, $newfile);

imagedestroy($new);
imagedestroy($img);
}

thumn("images/map.gif", 200, 200, "./images/map3.gif");

$back=imagecreatefromjpeg($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");

$color=imagecolorallocate($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);

$width=imagesx($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);
}

関数turn_x($background, $newfile){
$back=imagecreatefromjpeg($background);

$width=imagesx($back);
$height=imagesy($back);

$new=imagecreatetruecolor($width, $height);

for($y=0; $y < $height; $y++){
imagecopy($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");

$b_x=imagesx($back);
$b_y=imagesy($back);

$dst=imagecreatefromjpeg($background);
for($i=0; $i for($j=0; $j $b_clr1= imagecolorsforindex($back, imagecolorat($back, $i-1, $j-1));\前のピクセルカラー配列
$b_clr2=imagecolorsforindex($back, imagecolorat($back, $i, $j));現在の色の配列を取得します

$r=intval($b_clr2["red"]+$degree*($b_clr2["red"]-$b_clr1["red"]));\深化
$g=intval($b_clr2["green" ]+$degree*($b_clr2["green"]-$b_clr1["green"]));
$b=intval($b_clr2["blue"]+$degree*($b_clr2["blue"]- $b_clr1["青"]));

$r=min(255, max($r, 0));//r の範囲を 0 ～ 255 に制限します
$g=min(255, max($g, 0));
$b=最小 (255, 最大 ($b, 0));

if(($d_clr=imagecolorexact($dst, $r, $g, $b))==-1){//1 に等しいが色の範囲外です
$d_clr=Imagecolorallocate($dst, $r) , $g , $b);//色を作成します
}

imagesetpixel($dst, $i, $j, $d_clr);
}

}
imagejpeg($dst, $save);
imagedestroy($back);
imagedestroy($dst);
}

sharp("./images/hee.jpg", 20, "./images/hee13.jpg");