用于批量更改打开的图片的尺寸的photoshop 脚本 (javascript)。

用法：

把解压出来的 “改变尺寸.jsx” 文件复制到 “ps安装目录预置脚本” 下，重新打开ps以后就可以在~
[菜单- 文件-脚本] 里面找到 “改变尺寸”

或者解压出来，在开着ps的情况下，直接双击也可以用。

功能介绍：

1. 可以把当前文档（包括未保存过的）直接修改尺寸并保存为jpg。（注意会关闭当前文档！）
2. 可以针对整个文件夹进行操作。(程序设定为“不包括隐藏文件”，因此不想处理和不能处理的文件可以先设置为[隐藏]属性)
3. 可选择另存jpg 、gif、psd、tiff至另一个文件夹。
4. 另存时支持文件名前后添加字符。
5. 处理进度条，在大量文件处理的时候对进度掌握更好。(3月2日修正了隐藏文件导致进度条不准的bug)
6. 修改了改变尺寸的算法，允许对不需要控制的尺寸留空（小于1或不填写即为留空，留空值将根据选项 不改变或者等比计算）
7. 水印添加功能—可以平铺或添加独个的水印；并可以使用ps众多的图层混合模式。
8. 修正了1.2版本保存gif 格式时颜色位数错误的bug 。

如果有朋友问：想要半透明水印怎么办？想要倾斜水印怎么办？
答：把水印文件做成半透明（保存为png或者psd 之类）和倾斜的即可，脚本界面就不另外放置参数了。

界面图示：

脚本下载

其他旧版本及具体版本更新情况请到论坛交流：

经典论坛交流：
http://bbs.blueidea.com/thread-2831563-1-2.html

function shui(){ //水印处理函数
    if (!win.group.shuiSet.other.open.e.text) {
        alert("您没有选择水印文件");
    }else{
            var shuiFlie = File(win.group.shuiSet.other.open.e.text);
            docShui= open(shuiFlie);
            docShui.changeMode(ChangeMode.RGB);
            if (docShui.layers.length>1) docShui.mergeVisibleLayers(); //合并可见层
            var shuiLayer = docShui.activeLayer;
            
            if (parseInt(shuiLayer.bounds.toString().replace(/D/g,"")) == 0) {
                docShui.close(SaveOptions.DONOTSAVECHANGES);
                if(confirm("水印文件内容为空，继续操作将不会添加任何水印")) go(false);//继续操作，只是不添加水印        
            }else{
                //拷贝水印
                var suo=Number(win.group.shuiSet.other.hun.e.text);
                if (!suo) suo=1; //容错
                if (suo<0) suo=1;
                docShui.resizeImage(docShui.width*suo,docShui.height*suo,PRESOLUTION, ResampleMethod.BICUBIC); //变换水印大小
                var sW=Number(shuiLayer.bounds[2]-shuiLayer.bounds[0]);
                var sH=Number(shuiLayer.bounds[3]-shuiLayer.bounds[1]);
                docShui.selection.selectAll();
                docShui.selection.copy();
                docShui.close(SaveOptions.DONOTSAVECHANGES);                
                //新建文档定义水印为图案
                if (win.group.shui.g.fill.value){
                    var newDR = app.documents.add(Number(win.group.shuiSet.other.dis.e1.text)+sW, Number(win.group.shuiSet.other.dis.e2.text)+sH, 72, "ShuiTu", NewDocumentMode.RGB, DocumentFill.TRANSPARENT);
                    newDR.paste();
                    newDR.selection.selectAll();
                    setPattern("BlueIdea-Script-Watermark-"+nowTime.toString());
                    newDR.close(SaveOptions.DONOTSAVECHANGES);                    
                    newDR= null;
                    }
                go(true,sW,sH);
            }
    }
}
function pasteShui(nWidth,nHeight,moveX,moveY,sW,sH,sHun){ //粘贴水印及偏移or 填充
    app.activeDocument.changeMode(ChangeMode.RGB);
    if(win.group.shui.g.one.value){
                switch (true) {
                    case (allp.po1.c1.value||allp.po2.c4.value||allp.po3.c7.value):
                        NowMX=moveX-nWidth/2+sW/2;
                        break;
                    case (allp.po1.c2.value||allp.po2.c5.value||allp.po3.c8.value):
                        NowMX=moveX;
                        break;
                    case (allp.po1.c3.value||allp.po2.c6.value||allp.po3.c9.value):
                        NowMX=nWidth/2-moveX-sW/2;
                        break;
                    default :
                        NowMX=0;
                }
                switch (true) {
                    case (allp.po1.c1.value||allp.po1.c2.value||allp.po1.c3.value):
                        NowMY=moveY-nHeight/2+sH/2;
                        break;
                    case (allp.po2.c4.value||allp.po2.c5.value||allp.po2.c6.value):
                        NowMY=moveY;
                        break;
                    case (allp.po3.c7.value||allp.po3.c8.value||allp.po3.c9.value):
                        NowMY=nHeight/2-moveY-sH/2;
                        break;
                    default :
                        NowMY=0;
                }                 
                app.activeDocument.paste();
                app.activeDocument.activeLayer.translate (NowMX,NowMY);
    }else{
            app.activeDocument.artLayers.add();
            app.activeDocument.selection.selectAll();
            fillPattern("BlueIdea-Script-Watermark-"+nowTime.toString(),"id",100);
    }
    app.activeDocument.activeLayer.blendMode =eval("BlendMode."+sHun);
}
function save(docRef) {    //储存函数
        if (win.group.other.c.value){ //判断是否另存
            var don=win.group.otherSet.Quality;
            var inEmbedICC=win.group.otherSet.icc.value;
            var saveOptions;
            switch (saveType) {
                case "jpeg" :
                            docRef.flatten() ;//合并图层，以储存jpg                            
                            docRef.changeMode(ChangeMode.RGB); // 更改为rgb模式，避免其它模式无法储存
                            docRef.bitsPerChannel = BitsPerChannelType.EIGHT;
                            saveOptions = new JPEGSaveOptions();
                            saveOptions.quality = don.d.selection.index; //获取压缩质量
                            if (don.c.value) {
                                docRef.convertProfile("sRGB IEC61966-2.1", Intent.RELATIVECOLORIMETRIC, true, true);
                                }
                            saveOptions.embedColorProfile = inEmbedICC;
                            var typeName="jpg"; //定义后缀
                            break;
                case "gif" :
                            if (docRef.artLayers.length>1)docRef.mergeVisibleLayers(); //合并可见层
                            docRef.changeMode(ChangeMode.RGB);
                            saveOptions = new GIFSaveOptions();
                            saveOptions.colors = Math.pow(2,don.d.selection.index+1);
                            if (don.c.value){
                                saveOptions.dither = Dither.DIFFUSION; //扩散仿色        
                                }else{
                                saveOptions.dither = Dither.NONE;    
                                } ;
                            if (don.c2.value) {
                                saveOptions.transparency=1;
                                }else{
                                saveOptions.transparency=0;
                                };
                            //saveOptions.matte = MatteType.NONE; //杂边无，否则为白色
                            saveOptions.interlaced = 0; //不交错
                            var typeName="gif";
                            break;
                case "psd" :
                            saveOptions = new PhotoshopSaveOptions();
                            saveOptions.embedColorProfile = inEmbedICC;                            
                            var typeName="psd";
                            break;
                case "tiff" :
                            docRef.flatten() ;    
                            saveOptions = new TiffSaveOptions();
                            saveOptions.embedColorProfile = inEmbedICC;
                            if (don.c.value) {
                                saveOptions.imageCompression = TIFFEncoding.TIFFLZW;
                            } else {
                                saveOptions.imageCompression = TIFFEncoding.NONE;
                            }
                            var typeName="tif";    
                            break;
                default :
                            alert ("-_-!!! SaveType");
                }
            
                // 获取另存文件夹及前后追加字段
                var headWord = win.group.otherSet.head.e.text;
                var footWord = win.group.otherSet.foot.e.text;    
                
                if (win.group.otherSet.otherF.c.value){ //如果选中另存至文件夹
                            if (win.group.otherSet.folderS.s.text){
                                var saveFolder = win.group.otherSet.folderS.s.text+"/";    
                            }else{    
                                var saveFolder = docRef.path+"/newsize_";  //容错，避免没有具体选择另存到那个文件夹
                            }
                }else{
                            if (headWord || footWord){
                                var saveFolder = docRef.path+"/";
                            }else{
                                var saveFolder = docRef.path+"/newsize_"; //容错，避免没有添加前后缀而保存在本文件夹
                            }
                }
                if (docRef.name.lastIndexOf('.')==-1){  //根据原文件名有否后缀，判断是否去掉后缀
                        var oldname=docRef.name;
                    }else{
                        var oldname=docRef.name.substring(0,docRef.name.lastIndexOf('.'));
                    }
                
            docRef.saveAs(new File(saveFolder + headWord + oldname + footWord + "."+ typeName),saveOptions, true,Extension.LOWERCASE);    //设定输出文件名称            
        }else{
            docRef.save();
        }
        docRef.close(SaveOptions.DONOTSAVECHANGES); //关闭当前文档    
}
function go(shuiOK,sW,sH) { //最后循环处理及关闭
        var x=Number(win.group.corrdination.x.e.text);
        var y=Number(win.group.corrdination.y.e.text);
        var a=win.group.a.c.value;
        var b=win.group.b.c.value; //选中则不颠倒横竖，以输入值为准    
    
        if (saveType=="psd"){ //变更首选项
        var rememberMaximize = app.preferences.maximizeCompatibility; //psd格式最大兼容 原始选项 --记录
        var needMaximize = win.group.otherSet.Quality.c.value? QueryStateType.ALWAYS : QueryStateType.NEVER;
            if ( app.preferences.maximizeCompatibility != needMaximize ) {
                        app.preferences.maximizeCompatibility = needMaximize;
                }
        }        
        
        if (shuiOK){ //获取水印偏移量及混合模式
        var mdis =win.group.shuiSet.other.dis;
        var moveX=Number(mdis.e1.text),moveY=Number(mdis.e2.text);
            for (i=0;i<23;i++) {
                if (win.group.shuiSet.other.hun.d.items[i].selected==true){
                    var sHun=sBlend[i].substring(sBlend[i].indexOf(",")+1);
                    break;
                    }
            }
        }
        
        if (!win.group.now.c.value) {  // 当前活动文档为操作对象    
                var k=100/app.documents.length; //定义每个文件所占进度比例
                while (app.documents.length){
                        var docRef = app.activeDocument;
                        newsize(docRef,a,b,x,y);
                        if(shuiOK) pasteShui(Number(docRef.width),Number(docRef.height),moveX,moveY,sW,sH,sHun);
                        save(docRef);
                        win.group.timeline.value =win.group.timeline.value+k;
                }
        }else{ // 文件夹为操作对象            
                var openFolder = Folder(win.group.folderO.s.text);                
                var fileList = openFolder.getFiles() //获取open文件夹下所有文件
                var k=100/fileList.length;
                for (i=0;i<fileList.length;i++){
                    if (fileList[i] instanceof File && fileList[i].hidden == false){ //不处理隐藏文件
                        open(fileList[i]);
                        var docRef = app.activeDocument;
                        newsize(docRef,a,b,x,y);
                        if(shuiOK) pasteShui(Number(docRef.width),Number(docRef.height),moveX,moveY,sW,sH,sHun);
                        save(docRef);
                    }
                    win.group.timeline.value =win.group.timeline.value+k;
                }
        }
    
    if ( rememberMaximize != undefined )  app.preferences.maximizeCompatibility = rememberMaximize;  //psd格式最大兼容选项还原
    app.preferences.rulerUnits = startRulerUnits;
    app.preferences.typeUnits = startTypeUnits;
    if (shuiOK && win.group.shui.g.fill.value) delPattern(); //清除图案定义
    this.parent.parent.close();
}
win.buttons.Btnok.onClick = function () {    
        if (win.group.shui.c.value) {
            shui(); //处理水印及最后完成
        }else{
            go(false);
        }
}
win.center();
win.show();

本文链接：http://www.blueidea.com/tech/graph/2008/6216.asp