缩放图片脚本分享
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">
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<html>
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<head>
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<title> New Document </title>
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<meta name="Generator" content="EditPlus">
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<meta name="Author" content="">
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<meta name="Keywords" content="">
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<meta name="Description" content="">
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<script>
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function AutoResizeImage(maxWidth,maxHeight){
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var objImg = document.getElementById("operImg");
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var img = new Image();
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img.src = objImg.src;
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var hRatio;
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var wRatio;
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var Ratio = 1;
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var w = img.width;
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var h = img.height;
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wRatio = maxWidth / w;
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hRatio = maxHeight / h;
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if (maxWidth ==0 && maxHeight==0){
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Ratio = 1;
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}else if (maxWidth==0){//
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if (hRatio<1) Ratio = hRatio;
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}else if (maxHeight==0){
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if (wRatio<1) Ratio = wRatio;
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}else if (wRatio<1 || hRatio<1){
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Ratio = (wRatio<=hRatio?wRatio:hRatio);
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}
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if (Ratio<1){
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w = w * Ratio;
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h = h * Ratio;
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}
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objImg.height = h;
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objImg.width = w;
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}
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</script>
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</head>
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<body>
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<img src="1111.jpg" border="0" alt="534 X 800" id="operImg"/>
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<input type="button" value="缩放至宽100px，等比例压缩" onclick="AutoResizeImage(100,0)"/>
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<input type="button" value="缩放至300px，等比例压缩" onclick="AutoResizeImage(300,0)"/>
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<input type="button" value="原图" onclick="AutoResizeImage(0,0)"/>
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</body>
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</html>
unity3d
重点js:
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function AutoResizeImage(maxWidth,maxHeight){
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var objImg = document.getElementById("operImg");
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var img = new Image();
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img.src = objImg.src;
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var hRatio;
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var wRatio;
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var Ratio = 1;
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var w = img.width;
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var h = img.height;
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wRatio = maxWidth / w;
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hRatio = maxHeight / h;
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if (maxWidth ==0 && maxHeight==0){
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Ratio = 1;
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}else if (maxWidth==0){//
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if (hRatio<1) Ratio = hRatio;
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}else if (maxHeight==0){
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if (wRatio<1) Ratio = wRatio;
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}else if (wRatio<1 || hRatio<1){
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Ratio = (wRatio<=hRatio?wRatio:hRatio);
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}
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if (Ratio<1){
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w = w * Ratio;
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h = h * Ratio;
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}
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objImg.height = h;
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objImg.width = w;
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}
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