透過網頁讀取PSD後，依圖層輸出PNG檔案
在前面介紹過網頁可以讀取PSD檔案並擷取到該檔案的資訊，接著我們會希望能透過網頁上傳PSD檔之後，依照圖層來輸出圖片，同樣是利用PSD.js來輔助進行，可以透過我們製作的範例頁面來進行輸出測試。
預設輸出效果
透過PSD.js可將PSD內的各圖層輸出成PNG圖檔，亦可轉成Base 64圖檔格式，惟輸出時每個圖檔的尺寸並不會根據整體PSD檔大小來配置。
<!DOCTYPE html>
<html>
<head>
<title>psd.js image example</title>
<style type="text/css">
body, html {
padding: 0;
margin: 0;
}
#dropzone {
width: 500px;
height: 100px;
border: 1px #ababab dashed;
margin: 50px auto;
}
#dropzone p {
text-align: center;
line-height: 100px;
margin: 0;
padding: 0;
}
#image {
text-align: center;
}
</style>
<script type="text/javascript" src="psd.min.js"></script>
</head>
<body>
<div id="dropzone">
<p>Drop PSD here</p>
</div>
<div id="image"></div>
<pre id="data"></pre>
<script type="text/javascript">
(function () {
const PSD = require('psd');
document.getElementById('dropzone').addEventListener('dragover', onDragOver, true);
document.getElementById('dropzone').addEventListener('drop', onDrop, true);
function onDragOver(e) {
e.stopPropagation();
e.preventDefault();
e.dataTransfer.dropEffect = 'copy';
}
function onDrop(e) {
e.stopPropagation();
e.preventDefault();
PSD.fromEvent(e).then(function (psd) {
for (var i = 0; i < psd.layers.length; i ++){
document.getElementById('image').appendChild(psd.layers[i].image.toPng());
}
});
}
}());
</script>
</body>
</html>
依照整體PSD配置進行輸出
我們希望讓每個圖片在輸出後能保時相同的尺寸，也就是依照PSD的畫布大小來輸出每一張圖檔，但在原生PSD.js中並不具備這樣的功能，於是我們透過下述的方式來達成：
- 擷取PSD資訊並將圖檔轉為Base 64格式
- 產生與PSD尺寸大小相同的HTML Canvas
- 將產生的Base 64圖檔，依照原始位置放入Canvas中
- 將Canvas轉成PNG圖檔
可以參考我們製作的範例頁面
<!DOCTYPE html>
<html>
<head>
<title>psd.js image example</title>
<style type="text/css">
body, html {
padding: 0;
margin: 0;
}
#dropzone {
width: 500px;
height: 100px;
border: 1px #ababab dashed;
margin: 50px auto;
}
#dropzone p {
text-align: center;
line-height: 100px;
margin: 0;
padding: 0;
}
#image {
text-align: center;
}
</style>
<script type="text/javascript" src="psd.min.js"></script>
</head>
<body>
<div id="dropzone">
<p>Drop PSD here</p>
</div>
<div id="image"></div>
<pre id="data"></pre>
<script type="text/javascript">
(function () {
const PSD = require('psd');
document.getElementById('dropzone').addEventListener('dragover', onDragOver, true);
document.getElementById('dropzone').addEventListener('drop', onDrop, true);
function onDragOver(e) {
e.stopPropagation();
e.preventDefault();
e.dataTransfer.dropEffect = 'copy';
}
function onDrop(e) {
e.stopPropagation();
e.preventDefault();
PSD.fromEvent(e).then(function (psd) {
const PSDWidth = psd.tree().width;
const PSDHeight = psd.tree().height;
for (var i = 0; i < psd.layers.length; i ++){
const img = new Image();
img.src = psd.layers[i].image.toBase64();
console.log(psd);
const layerWidth = psd.layers[i].width;
const layerHeight = psd.layers[i].height;
const layerLeft = psd.layers[i].left;
const layerTop = psd.layers[i].top;
const canvas = document.createElement("canvas");
canvas.setAttribute('class', "canvas");
canvas.width = PSDWidth;
canvas.height = PSDHeight;
console.log("canvas :", canvas);
img.onload = function(){
canvas.getContext("2d").drawImage(img, layerLeft, layerTop, layerWidth, layerHeight);
document.getElementById('image').appendChild(canvas);
}
}
});
}
}());
</script>
</body>
</html>
PSD檔案輸出限制
1. 無法輸出帶有效果的圖片
在PSD中我們可能會針對圖層套用一些效果，例如：陰影、光暈、筆畫…等等，但在輸出後的圖檔將不會帶有這些效果。
解決方法：透過點陣化圖層效果，即可輸出相對應的圖檔。
2. 無法輸出帶有遮色片效果的圖片
解決方法：將圖層轉為智慧型物件，即可輸出相對應的圖檔。
3. 無法依圖層混合模式輸出圖片
解決方法：無法解決
cost of cheap clomid no prescription: clomid rx – where can i get cheap clomid without prescription
buy zithromax without prescription online: buy zithromax online cheap – buy cheap generic zithromax
https://amoxicillin.bid/# amoxicillin price without insurance
http://clomiphene.icu/# can you buy cheap clomid prices
ivermectin 2mg stromectol medicine stromectol 12mg
where to buy amoxicillin pharmacy: amoxicillin 500mg price canada – amoxicillin 500 mg price
where can i get cheap clomid without dr prescription: can i order generic clomid online – cost of generic clomid
where to buy prednisone in canada: prednisone 12 tablets price – buy prednisone online australia
http://clomiphene.icu/# where can i get cheap clomid no prescription
where to buy amoxicillin 500mg without prescription: amoxicillin medicine over the counter – order amoxicillin no prescription
5 mg prednisone daily prednisone without prescription medication prednisone for dogs
https://amoxicillin.bid/# amoxicillin without a prescription
http://ivermectin.store/# stromectol ireland
I likle the valuablee information you provide in your articles.
I’ll bookmark your blog annd trst onjce more right
hwre regularly. I’m slightly suure I’ll bee infomed mahy nnew stuff proper right here!Good luck for
thee next!
Thatt iss a great ttip particulaqrly to thbose new tto thee blogosphere.
Simplle butt vdry accurate information… Thanks for shaaring this one.
A must rdad article!
can i purchase generic clomid without dr prescription: clomid sale – can i order generic clomid without rx
zithromax price canada: buy zithromax 1000 mg online – zithromax antibiotic without prescription
http://ivermectin.store/# п»їwhere to buy stromectol online
buy amoxicillin from canada amoxicillin 500mg without prescription can you buy amoxicillin over the counter in canada
amoxicillin 500 tablet: amoxicillin without prescription – amoxicillin price without insurance
buy generic clomid without prescription can i order generic clomid can i order cheap clomid without rx
http://ivermectin.store/# ivermectin
https://amoxicillin.bid/# where can i buy amoxicillin over the counter
can i get clomid no prescription buy generic clomid without rx order cheap clomid without prescription
stromectol price usa: stromectol ivermectin – ivermectin tablet 1mg
minocycline capsule: minocycline antibiotic – ivermectin rx
cortisol prednisone: prednisone 25mg from canada – prednisone 10 mg tablet
buy amoxicillin 250mg can i buy amoxicillin over the counter where to get amoxicillin over the counter
where buy cheap clomid without insurance: cost clomid tablets – can i purchase generic clomid without prescription
Всем рекомендую!депрессия психолог