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| <!DOCTYPE html>
<title>modif image</title>
<style>
#csv {
position: absolute;
top: 50%;
left: 50%;
margin: -180px 0 0 20px;
border :1px solid #444444;
cursor:crosshair
}
</style>
<script>
var code={"0":0,"1":1,"2":2,"3":3,"4":4,"5":5,"6":6,"7":7,"8":8,"9":9,"a":10,"b":11,"c":12,"d":13,"e":14,"f":15}
var cvs_originale=""
var cvs=''
var valeur =000000
var r2 = 00
var g2 = 00
var b2 = 00
addEventListener('load',function(){
cvs_originale=document.createElement("canvas");
cvs_originale.height=400
cvs_originale.width=500
},false);
function drop(e) {
var fichier = document.getElementById('fileinput').files;
if (fichier[0].type.match('image.*')) {
var urimg=window.URL.createObjectURL(fichier[0]);
var img = new Image;
img.src = urimg;
img.onload = function() {
var cvs=document.getElementById('csv')
var contexte = cvs.getContext('2d');
contexte.drawImage(img, 0,0,cvs.width,cvs.height);
cvs_originale.getContext('2d').drawImage(img, 0,0,cvs.width,cvs.height);
window.URL.revokeObjectURL(urimg);
}
}
}
function val_inp() {
valeur = document.getElementById('choi_coul').value
valeur=valeur.substring(1, valeur.length)
r2 = code[valeur[0]]*16+code[valeur[1]]
g2 = code[valeur[2]]*16+code[valeur[3]]
b2 = code[valeur[4]]*16+code[valeur[5]]
}
function val_pipete(e) {
var cvs=document.getElementById('csv');
var dde=(navigator.vendor) ? document.body : document.documentElement;
var X =e.clientX + dde.scrollLeft-cvs.offsetLeft;
var Y =e.clientY + dde.scrollTop-cvs.offsetTop;
var idata = cvs.getContext('2d').getImageData(X,Y,1,1);
var data = idata.data;
r2 = data[0]
g2 = data[1]
b2 = data[2];
var rgb='rgb('+data[0]+','+data[1]+','+data[2]+')';
document.getElementById('choi_coul').style.backgroundColor=rgb;
}
function modifier() {
var sensib=parseInt(document.getElementById('rg').value)
var cvs=document.getElementById('csv');
var idata = cvs_originale.getContext('2d').getImageData(0,0,cvs.width,cvs.height);
var data = idata.data;
for(var i = 0; i < data.length; i+=4) {
var r = data[i];
var g = data[i+1];
var b = data[i+2];
if ((r < r2+sensib && r > r2-sensib) && (g < g2+sensib && g > g2-sensib) && (b < b2+sensib && b > b2-sensib)){;
data[i+3] = 0;
}
}
idata.data = data;
cvs.getContext('2d').putImageData(idata,0,0);
}
function telecharger(e){
if(navigator.msSaveOrOpenBlob){
var blobObject=document.getElementById("canvas").msToBlob()
window.navigator.msSaveOrOpenBlob(blobObject, this.input_fichier.value+".png");
}
else{
var canvas = document.getElementById("csv");
var elem = document.createElement('a');
elem.href = canvas.toDataURL("image/png");
elem.download = "nom.png";
var evt = new MouseEvent("click", { bubbles: true,cancelable: true,view: window,});
elem.dispatchEvent(evt);
}
}
</script>
<input type='file' multiple='multiple' id='fileinput' onchange='drop()'>
<br><br>
<label for="favcolor">choisir couleur</label>
<input type="color" id="choi_coul" value="#ff0000" oninput="val_inp()">
<br><br>
<label for="rg">sensibilite</label>
<input type='range' min="0" max="256" step="4" id="rg" oninput="modifier()">
<br><br>
<button onclick="telecharger(event)">telecharger</button>
<canvas id="csv" height=400 width="500" onclick="val_pipete(event)" ></canvas> |
