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| 文件: | upload.rar |
| 大小: | 1KB |
| 下载: | 下载 |
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很久以前写的一个了,今天有哥们问我要一个.再次整理一下,留着有需要的时候用到.
/* 参数列表,其中[原图路径][新图路径]一定要有,其它参数可使用默认,如:CreateSmallImage("1.jpg", "2.jpg");
* $OldImagePath 原图路径
* $NewImagePath 新图路径
* $WatermarkStr 水印文字
* $WriteInStringSize 水印文字,字体大小
* $NewWidth 新图宽度
* $NewHeight 新图高度
* $fontpath 水印字体路径
*/
function CreateSmallImage( $OldImagePath, $NewImagePath, $WatermarkStr = "", $WriteInStringSize = 15, $NewWidth=250, $NewHeight=185, $fontpath="upload/STXINWEI.TTF" )
{
// 建立目录
$dirArr = explode("/", $NewImagePath);
$newPath = $dirArr[0].'/';
foreach ($dirArr AS $dk => $dv)
{
if (($dk < count($dirArr) - 1) && $dk > 0)
{
$newPath .= $dv.'/';
if (!is_dir($newPath)) mkdir($newPath, 0777); chmod($newPath, 0777);
}
}
// 取出原图，获得图形信息getimagesize参数说明：0(宽),1(高),2(1gif/2jpg/3png),3(width="638" height="340"),后面还有点其它信息好像用处不大
$OldImageInfo = getimagesize($OldImagePath);
if ( $OldImageInfo[2] == 1 ) $OldImg = @imagecreatefromgif($OldImagePath);
elseif ( $OldImageInfo[2] == 2 ) $OldImg = @imagecreatefromjpeg($OldImagePath);
else $OldImg = @imagecreatefrompng($OldImagePath);
// 创建图形,imagecreate参数说明：宽,高
$NewImg = imagecreatetruecolor( $NewWidth, $NewHeight );
// 给图形着背景色
/* 暂时用不着 */
// 创建色彩,参数：图形,red(0-255),green(0-255),blue(0-255)
$black = ImageColorAllocate( $NewImg, 0, 0, 0 ); // 黑色
$white = ImageColorAllocate( $NewImg, 255, 255, 255 ); // 白色
$red = ImageColorAllocate( $NewImg, 255, 0, 0 ); // 红色
$blue = ImageColorAllocate( $NewImg, 0, 0, 255 ); // 蓝色
$other = ImageColorAllocate( $NewImg, 0, 255, 0 ); // 不知道叫什么
// 新图形高宽处理
$WriteNewWidth = $NewHeight*$OldImageInfo[0] / $OldImageInfo[1]; // 要写入的高度
$WriteNewHeight = $NewWidth*$OldImageInfo[1] / $OldImageInfo[0]; // 要写入的宽度
if ( $WriteNewWidth <= $NewWidth ) // 以$NewHeight为基础,如果新宽小于或等于$NewWidth,则成立
{
$WriteNewWidth = $WriteNewWidth; // 用判断后的大小
$WriteNewHeight = $NewHeight; // 用规定的大小
$WriteX = floor( ($NewWidth-$WriteNewWidth) / 2 ); // 在新图片上写入的X位置计算
$WriteY = 0;
} else {
$WriteNewWidth = $NewWidth; // 用规定的大小
$WriteNewHeight = $WriteNewHeight; // 用判断后的大小
$WriteX = 0;
$WriteY = floor( ($NewHeight-$WriteNewHeight) / 2 ); // 在新图片上写入的X位置计算
}
// 旧图形缩小后,写入到新图形上(复制),imagecopyresized参数说明：新旧, 新xy旧xy, 新宽高旧宽高
@imagecopyresampled( $NewImg, $OldImg, $WriteX, $WriteY, 0, 0, $WriteNewWidth, $WriteNewHeight, $OldImageInfo[0], $OldImageInfo[1] );
if( $WatermarkStr != '' )
{
// 计算要写入的字符所占区域,ImageTTFBBox参数说明：字形的尺寸,字型的角度,字体路径,字符串内容
if( $WriteInStringSize == '' ) $WriteInStringSize = 20;
if( $WriteInStringSize < 5 ) $WriteInStringSize = 5;
if( $WriteInStringSize > 72 ) $WriteInStringSize = 72;
$WriteInStringArea = ImageTTFBBox( $WriteInStringSize, 0, $fontpath, $WatermarkStr );
while ( $WriteInStringArea[2] > $NewHeight )
{
$WriteInStringSize -= 5;
$WriteInStringArea = ImageTTFBBox( $WriteInStringSize, 0, $fontpath, $WatermarkStr );
}
$WriteInStringX = $NewWidth - $WriteInStringArea[2] - 5;
$WriteInStringY = $NewHeight - $WriteInStringArea[3] - 5;
// 转换水印编码
$WatermarkStr = iconv( "gb2312", "UTF-8", $WatermarkStr );
// 在新图形上写入文字，ImageTTFText参数说明：要写入的图形,字型尺寸,为字型的角度,x,y,颜色参数,字体路径,字符串内容
ImageTTFText( $NewImg, $WriteInStringSize, 0, $WriteInStringX, $WriteInStringY, $other, $fontpath, $WatermarkStr );
}
// 保存文件
@imagegif( $NewImg, $NewImagePath );
// 结束图形
@imagedestroy($NewImg);
}
