/*

* @(#)imageutil.php

*

* Copyright 2007 SoftRoad. All Rights Reserved.

*

*====================================================================

* 変更履歴

*

* 新規作成                            2007年5月11日   蒋　彪

*/

require ("bmp.php"); //http://blog.csdn.net/joliny/archive/2007/06/20/1659441.aspx

/**

* イメージ操作共通クラス

*

* @author 蒋　彪

*/

class ImageUtil {

/*

* イメージ拡大・縮小

* $uploadfile 絶対パス(元)

* $thumbfile 絶対パス(先)

* $width 新しいサイズ・幅

* $height 新しいサイズ・高さ

*/

function resize($uploadfile, $thumbfile, $width, $height) {

$size = GetImageSize($uploadfile);

if ($size[2] == 1)

$im_in = imagecreatefromgif($uploadfile);

if ($size[2] == 2)

$im_in = imagecreatefromjpeg($uploadfile);

if ($size[2] == 3)

$im_in = imagecreatefrompng($uploadfile);

if ($size[2] == 6) {

$im_in = imagecreatefrombmp($uploadfile);

}

if ($width == "" || $width == 0) {

$width = $size[0];

}

if ($height == "" || $height == 0) {

$height = $size[1];

}

$im_out = ImageCreateTrueColor($width, $height);

/*ImageCopyResized*/

imagecopyresampled($im_out, $im_in, 0, 0, 0, 0, $width, $height, $size[0], $size[1]);

Imagejpeg($im_out, $thumbfile);

chmod($thumbfile, 0777);

ImageDestroy($im_in);

ImageDestroy($im_out);

}

function imgResize($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) {

ImagePaletteCopy($dst_img, $src_img);

$rX = $src_w / $dst_w;

$rY = $src_h / $dst_h;

$nY = 0;

for ($y = $src_y; $y < $dst_h; $y++) {

$oY = $nY;

$nY = intval(($y +1) * $rY +.5);

$nX = 0;

for ($x = $src_x; $x < $dst_w; $x++) {

$r = $g = $b = $a = 0;

$oX = $nX;

$nX = intval(($x +1) * $rX +.5);

for ($i = $nY; -- $i >= $oY;) {

for ($j = $nX; -- $j >= $oX;) {

$c = ImageColorsForIndex($src_img, ImageColorAt($src_img, $j, $i));

$r += $c['red'];

$g += $c['green'];

$b += $c['blue'];

$a++;

}

}

ImageSetPixel($dst_img, ($x + $dst_x - $src_x), ($y + $dst_y - $src_y), ImageColorClosest($dst_img, $r / $a, $g / $a, $b / $a));

}

}

}

}?>