Mixing
how to implement eraser in fabric js
0
var width = $('#image').width();
var height = $('#image').height();
var canvas = new fabric.Canvas('kv_mark', { selection: false , width: width, height: height });
var mark="";
var i=0;
var linex1=;
var linex2=;
var liney1=;
var liney2=;
var rightx=;
var righty=;
var wrongx=;
var wrongy=;
$('.mark-button').click(function(){
// alert('here');
mark = $(this).data('value');
if(mark=='right'){
img = "img/tick-green.png";
}
if(mark=='wrong'){
img = "img/wrong.png";
}
if(mark==""){alert('please select a tool');}
});
var line, isDown;
canvas.on('mouse:down', function(o){
if(mark=='line'){
isDown = true;
var pointer = canvas.getPointer(o.e);
var points = [ pointer.x, pointer.y, pointer.x, pointer.y ];
x1=pointer.x;
y1=pointer.y;
linex1.push(x1);
liney1.push(y1);
line = new fabric.Line(points, {
strokeWidth: 1 ,
fill: 'red',
stroke: 'red',
originX: 'center',
originY: 'center'
});
canvas.add(line);
}
});
canvas.on('mouse:move', function(o){
if(mark=='line'){
if (!isDown) return;
var pointer = canvas.getPointer(o.e);
line.set({ x2: pointer.x, y2: pointer.y });
canvas.renderAll();
// console.log(pointer);
}
});
canvas.on('mouse:up', function(o){
var pointer = canvas.getPointer(o.e);
x2=pointer.x;
y2=pointer.y;
linex2.push(x2);
liney2.push(y2);
if(mark=='line'){isDown = false;}
});
canvas.on('mouse:dblclick', function(o){
if(mark=='wrong' || mark=='right'){
var pointer = canvas.getPointer(o.e);
var x = pointer.x;
var y = pointer.y;
if(mark=='wrong'){
wrongx.push(x);
wrongy.push(y);
}
if(mark=='right'){
rightx.push(x);
righty.push(y);
}
$("#container").append('<img class="mark" src="http://localhost:9000/'+img+'" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:3;width:20px;height:20">');
//
// // $("#kv_mark").append('<img class="mark" src="{{ asset('wrong.png')}}" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:2;width:20px;height:20">');
i++;}
});
$('#container').on("click",".mark",function(e){
$(this).remove();
});
$('#kv_mark').on("click",".mark",function(e){
$(this).remove();
});
$("#kv_mark").dblclick(function(e){
a[i] = (e.pageX - this.offsetLeft)-17;
b[i] = (e.pageY - this.offsetTop)-17;
// console.log(a);
// console.log(b);
}) .correction-block{
width:100%;
position: relative;
}
.correction-block img{
width:100%;
}
.canvas-body{
position:relative;
/*top:0;
left:0;
height:100%;
width:100%;*/
}
.correction-block .canvas-container{
position: absolute!important;
top:0;
left:0;
width:100%!important;
height:100%!important;
border:1px solid #333;
}
.correction-block canvas{
position: absolute;
top:0;
left:0;
width:100%!important;
height:100%!important;
}
.relative{
position: relative;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.4.3/fabric.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" class="relative">
<div class="correction-block">
<img src="{{ asset('img/scanned1.jpeg') }}" alt="" id="image">
<canvas id="kv_mark"> </canvas>
</div>
</div>I implemented fabric js to draw over an image I don't how to erase on it I tried something but it is not erasing it is just adding white so my image is not showing there can anyone suggest how to add an eraser to fabric the way that it won't affect the image behind that canvas or any other approach to my problem
javascript html5-canvas fabricjs
asked Nov 20 '18 at 5:53
kritarthkritarth
62
add a comment |
0
var width = $('#image').width();
var height = $('#image').height();
var canvas = new fabric.Canvas('kv_mark', { selection: false , width: width, height: height });
var mark="";
var i=0;
var linex1=;
var linex2=;
var liney1=;
var liney2=;
var rightx=;
var righty=;
var wrongx=;
var wrongy=;
$('.mark-button').click(function(){
// alert('here');
mark = $(this).data('value');
if(mark=='right'){
img = "img/tick-green.png";
}
if(mark=='wrong'){
img = "img/wrong.png";
}
if(mark==""){alert('please select a tool');}
});
var line, isDown;
canvas.on('mouse:down', function(o){
if(mark=='line'){
isDown = true;
var pointer = canvas.getPointer(o.e);
var points = [ pointer.x, pointer.y, pointer.x, pointer.y ];
x1=pointer.x;
y1=pointer.y;
linex1.push(x1);
liney1.push(y1);
line = new fabric.Line(points, {
strokeWidth: 1 ,
fill: 'red',
stroke: 'red',
originX: 'center',
originY: 'center'
});
canvas.add(line);
}
});
canvas.on('mouse:move', function(o){
if(mark=='line'){
if (!isDown) return;
var pointer = canvas.getPointer(o.e);
line.set({ x2: pointer.x, y2: pointer.y });
canvas.renderAll();
// console.log(pointer);
}
});
canvas.on('mouse:up', function(o){
var pointer = canvas.getPointer(o.e);
x2=pointer.x;
y2=pointer.y;
linex2.push(x2);
liney2.push(y2);
if(mark=='line'){isDown = false;}
});
canvas.on('mouse:dblclick', function(o){
if(mark=='wrong' || mark=='right'){
var pointer = canvas.getPointer(o.e);
var x = pointer.x;
var y = pointer.y;
if(mark=='wrong'){
wrongx.push(x);
wrongy.push(y);
}
if(mark=='right'){
rightx.push(x);
righty.push(y);
}
$("#container").append('<img class="mark" src="http://localhost:9000/'+img+'" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:3;width:20px;height:20">');
//
// // $("#kv_mark").append('<img class="mark" src="{{ asset('wrong.png')}}" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:2;width:20px;height:20">');
i++;}
});
$('#container').on("click",".mark",function(e){
$(this).remove();
});
$('#kv_mark').on("click",".mark",function(e){
$(this).remove();
});
$("#kv_mark").dblclick(function(e){
a[i] = (e.pageX - this.offsetLeft)-17;
b[i] = (e.pageY - this.offsetTop)-17;
// console.log(a);
// console.log(b);
}) .correction-block{
width:100%;
position: relative;
}
.correction-block img{
width:100%;
}
.canvas-body{
position:relative;
/*top:0;
left:0;
height:100%;
width:100%;*/
}
.correction-block .canvas-container{
position: absolute!important;
top:0;
left:0;
width:100%!important;
height:100%!important;
border:1px solid #333;
}
.correction-block canvas{
position: absolute;
top:0;
left:0;
width:100%!important;
height:100%!important;
}
.relative{
position: relative;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.4.3/fabric.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" class="relative">
<div class="correction-block">
<img src="{{ asset('img/scanned1.jpeg') }}" alt="" id="image">
<canvas id="kv_mark"> </canvas>
</div>
</div>I implemented fabric js to draw over an image I don't how to erase on it I tried something but it is not erasing it is just adding white so my image is not showing there can anyone suggest how to add an eraser to fabric the way that it won't affect the image behind that canvas or any other approach to my problem
javascript html5-canvas fabricjs
asked Nov 20 '18 at 5:53
kritarthkritarth
62
can please add your code to jsfiddle? it is easy for others to provide solution.
– varit05
Nov 20 '18 at 6:05
add a comment |
0
0
0
var width = $('#image').width();
var height = $('#image').height();
var canvas = new fabric.Canvas('kv_mark', { selection: false , width: width, height: height });
var mark="";
var i=0;
var linex1=;
var linex2=;
var liney1=;
var liney2=;
var rightx=;
var righty=;
var wrongx=;
var wrongy=;
$('.mark-button').click(function(){
// alert('here');
mark = $(this).data('value');
if(mark=='right'){
img = "img/tick-green.png";
}
if(mark=='wrong'){
img = "img/wrong.png";
}
if(mark==""){alert('please select a tool');}
});
var line, isDown;
canvas.on('mouse:down', function(o){
if(mark=='line'){
isDown = true;
var pointer = canvas.getPointer(o.e);
var points = [ pointer.x, pointer.y, pointer.x, pointer.y ];
x1=pointer.x;
y1=pointer.y;
linex1.push(x1);
liney1.push(y1);
line = new fabric.Line(points, {
strokeWidth: 1 ,
fill: 'red',
stroke: 'red',
originX: 'center',
originY: 'center'
});
canvas.add(line);
}
});
canvas.on('mouse:move', function(o){
if(mark=='line'){
if (!isDown) return;
var pointer = canvas.getPointer(o.e);
line.set({ x2: pointer.x, y2: pointer.y });
canvas.renderAll();
// console.log(pointer);
}
});
canvas.on('mouse:up', function(o){
var pointer = canvas.getPointer(o.e);
x2=pointer.x;
y2=pointer.y;
linex2.push(x2);
liney2.push(y2);
if(mark=='line'){isDown = false;}
});
canvas.on('mouse:dblclick', function(o){
if(mark=='wrong' || mark=='right'){
var pointer = canvas.getPointer(o.e);
var x = pointer.x;
var y = pointer.y;
if(mark=='wrong'){
wrongx.push(x);
wrongy.push(y);
}
if(mark=='right'){
rightx.push(x);
righty.push(y);
}
$("#container").append('<img class="mark" src="http://localhost:9000/'+img+'" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:3;width:20px;height:20">');
//
// // $("#kv_mark").append('<img class="mark" src="{{ asset('wrong.png')}}" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:2;width:20px;height:20">');
i++;}
});
$('#container').on("click",".mark",function(e){
$(this).remove();
});
$('#kv_mark').on("click",".mark",function(e){
$(this).remove();
});
$("#kv_mark").dblclick(function(e){
a[i] = (e.pageX - this.offsetLeft)-17;
b[i] = (e.pageY - this.offsetTop)-17;
// console.log(a);
// console.log(b);
}) .correction-block{
width:100%;
position: relative;
}
.correction-block img{
width:100%;
}
.canvas-body{
position:relative;
/*top:0;
left:0;
height:100%;
width:100%;*/
}
.correction-block .canvas-container{
position: absolute!important;
top:0;
left:0;
width:100%!important;
height:100%!important;
border:1px solid #333;
}
.correction-block canvas{
position: absolute;
top:0;
left:0;
width:100%!important;
height:100%!important;
}
.relative{
position: relative;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.4.3/fabric.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" class="relative">
<div class="correction-block">
<img src="{{ asset('img/scanned1.jpeg') }}" alt="" id="image">
<canvas id="kv_mark"> </canvas>
</div>
</div>I implemented fabric js to draw over an image I don't how to erase on it I tried something but it is not erasing it is just adding white so my image is not showing there can anyone suggest how to add an eraser to fabric the way that it won't affect the image behind that canvas or any other approach to my problem
javascript html5-canvas fabricjs
asked Nov 20 '18 at 5:53
kritarthkritarth
62
var width = $('#image').width();
var height = $('#image').height();
var canvas = new fabric.Canvas('kv_mark', { selection: false , width: width, height: height });
var mark="";
var i=0;
var linex1=;
var linex2=;
var liney1=;
var liney2=;
var rightx=;
var righty=;
var wrongx=;
var wrongy=;
$('.mark-button').click(function(){
// alert('here');
mark = $(this).data('value');
if(mark=='right'){
img = "img/tick-green.png";
}
if(mark=='wrong'){
img = "img/wrong.png";
}
if(mark==""){alert('please select a tool');}
});
var line, isDown;
canvas.on('mouse:down', function(o){
if(mark=='line'){
isDown = true;
var pointer = canvas.getPointer(o.e);
var points = [ pointer.x, pointer.y, pointer.x, pointer.y ];
x1=pointer.x;
y1=pointer.y;
linex1.push(x1);
liney1.push(y1);
line = new fabric.Line(points, {
strokeWidth: 1 ,
fill: 'red',
stroke: 'red',
originX: 'center',
originY: 'center'
});
canvas.add(line);
}
});
canvas.on('mouse:move', function(o){
if(mark=='line'){
if (!isDown) return;
var pointer = canvas.getPointer(o.e);
line.set({ x2: pointer.x, y2: pointer.y });
canvas.renderAll();
// console.log(pointer);
}
});
canvas.on('mouse:up', function(o){
var pointer = canvas.getPointer(o.e);
x2=pointer.x;
y2=pointer.y;
linex2.push(x2);
liney2.push(y2);
if(mark=='line'){isDown = false;}
});
canvas.on('mouse:dblclick', function(o){
if(mark=='wrong' || mark=='right'){
var pointer = canvas.getPointer(o.e);
var x = pointer.x;
var y = pointer.y;
if(mark=='wrong'){
wrongx.push(x);
wrongy.push(y);
}
if(mark=='right'){
rightx.push(x);
righty.push(y);
}
$("#container").append('<img class="mark" src="http://localhost:9000/'+img+'" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:3;width:20px;height:20">');
//
// // $("#kv_mark").append('<img class="mark" src="{{ asset('wrong.png')}}" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:2;width:20px;height:20">');
i++;}
});
$('#container').on("click",".mark",function(e){
$(this).remove();
});
$('#kv_mark').on("click",".mark",function(e){
$(this).remove();
});
$("#kv_mark").dblclick(function(e){
a[i] = (e.pageX - this.offsetLeft)-17;
b[i] = (e.pageY - this.offsetTop)-17;
// console.log(a);
// console.log(b);
}) .correction-block{
width:100%;
position: relative;
}
.correction-block img{
width:100%;
}
.canvas-body{
position:relative;
/*top:0;
left:0;
height:100%;
width:100%;*/
}
.correction-block .canvas-container{
position: absolute!important;
top:0;
left:0;
width:100%!important;
height:100%!important;
border:1px solid #333;
}
.correction-block canvas{
position: absolute;
top:0;
left:0;
width:100%!important;
height:100%!important;
}
.relative{
position: relative;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.4.3/fabric.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" class="relative">
<div class="correction-block">
<img src="{{ asset('img/scanned1.jpeg') }}" alt="" id="image">
<canvas id="kv_mark"> </canvas>
</div>
</div>I implemented fabric js to draw over an image I don't how to erase on it I tried something but it is not erasing it is just adding white so my image is not showing there can anyone suggest how to add an eraser to fabric the way that it won't affect the image behind that canvas or any other approach to my problem
var width = $('#image').width();
var height = $('#image').height();
var canvas = new fabric.Canvas('kv_mark', { selection: false , width: width, height: height });
var mark="";
var i=0;
var linex1=;
var linex2=;
var liney1=;
var liney2=;
var rightx=;
var righty=;
var wrongx=;
var wrongy=;
$('.mark-button').click(function(){
// alert('here');
mark = $(this).data('value');
if(mark=='right'){
img = "img/tick-green.png";
}
if(mark=='wrong'){
img = "img/wrong.png";
}
if(mark==""){alert('please select a tool');}
});
var line, isDown;
canvas.on('mouse:down', function(o){
if(mark=='line'){
isDown = true;
var pointer = canvas.getPointer(o.e);
var points = [ pointer.x, pointer.y, pointer.x, pointer.y ];
x1=pointer.x;
y1=pointer.y;
linex1.push(x1);
liney1.push(y1);
line = new fabric.Line(points, {
strokeWidth: 1 ,
fill: 'red',
stroke: 'red',
originX: 'center',
originY: 'center'
});
canvas.add(line);
}
});
canvas.on('mouse:move', function(o){
if(mark=='line'){
if (!isDown) return;
var pointer = canvas.getPointer(o.e);
line.set({ x2: pointer.x, y2: pointer.y });
canvas.renderAll();
// console.log(pointer);
}
});
canvas.on('mouse:up', function(o){
var pointer = canvas.getPointer(o.e);
x2=pointer.x;
y2=pointer.y;
linex2.push(x2);
liney2.push(y2);
if(mark=='line'){isDown = false;}
});
canvas.on('mouse:dblclick', function(o){
if(mark=='wrong' || mark=='right'){
var pointer = canvas.getPointer(o.e);
var x = pointer.x;
var y = pointer.y;
if(mark=='wrong'){
wrongx.push(x);
wrongy.push(y);
}
if(mark=='right'){
rightx.push(x);
righty.push(y);
}
$("#container").append('<img class="mark" src="http://localhost:9000/'+img+'" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:3;width:20px;height:20">');
//
// // $("#kv_mark").append('<img class="mark" src="{{ asset('wrong.png')}}" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:2;width:20px;height:20">');
i++;}
});
$('#container').on("click",".mark",function(e){
$(this).remove();
});
$('#kv_mark').on("click",".mark",function(e){
$(this).remove();
});
$("#kv_mark").dblclick(function(e){
a[i] = (e.pageX - this.offsetLeft)-17;
b[i] = (e.pageY - this.offsetTop)-17;
// console.log(a);
// console.log(b);
}) .correction-block{
width:100%;
position: relative;
}
.correction-block img{
width:100%;
}
.canvas-body{
position:relative;
/*top:0;
left:0;
height:100%;
width:100%;*/
}
.correction-block .canvas-container{
position: absolute!important;
top:0;
left:0;
width:100%!important;
height:100%!important;
border:1px solid #333;
}
.correction-block canvas{
position: absolute;
top:0;
left:0;
width:100%!important;
height:100%!important;
}
.relative{
position: relative;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.4.3/fabric.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" class="relative">
<div class="correction-block">
<img src="{{ asset('img/scanned1.jpeg') }}" alt="" id="image">
<canvas id="kv_mark"> </canvas>
</div>
</div> var width = $('#image').width();
var height = $('#image').height();
var canvas = new fabric.Canvas('kv_mark', { selection: false , width: width, height: height });
var mark="";
var i=0;
var linex1=;
var linex2=;
var liney1=;
var liney2=;
var rightx=;
var righty=;
var wrongx=;
var wrongy=;
$('.mark-button').click(function(){
// alert('here');
mark = $(this).data('value');
if(mark=='right'){
img = "img/tick-green.png";
}
if(mark=='wrong'){
img = "img/wrong.png";
}
if(mark==""){alert('please select a tool');}
});
var line, isDown;
canvas.on('mouse:down', function(o){
if(mark=='line'){
isDown = true;
var pointer = canvas.getPointer(o.e);
var points = [ pointer.x, pointer.y, pointer.x, pointer.y ];
x1=pointer.x;
y1=pointer.y;
linex1.push(x1);
liney1.push(y1);
line = new fabric.Line(points, {
strokeWidth: 1 ,
fill: 'red',
stroke: 'red',
originX: 'center',
originY: 'center'
});
canvas.add(line);
}
});
canvas.on('mouse:move', function(o){
if(mark=='line'){
if (!isDown) return;
var pointer = canvas.getPointer(o.e);
line.set({ x2: pointer.x, y2: pointer.y });
canvas.renderAll();
// console.log(pointer);
}
});
canvas.on('mouse:up', function(o){
var pointer = canvas.getPointer(o.e);
x2=pointer.x;
y2=pointer.y;
linex2.push(x2);
liney2.push(y2);
if(mark=='line'){isDown = false;}
});
canvas.on('mouse:dblclick', function(o){
if(mark=='wrong' || mark=='right'){
var pointer = canvas.getPointer(o.e);
var x = pointer.x;
var y = pointer.y;
if(mark=='wrong'){
wrongx.push(x);
wrongy.push(y);
}
if(mark=='right'){
rightx.push(x);
righty.push(y);
}
$("#container").append('<img class="mark" src="http://localhost:9000/'+img+'" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:3;width:20px;height:20">');
//
// // $("#kv_mark").append('<img class="mark" src="{{ asset('wrong.png')}}" id="'+x+'_'+y+'" style="position:absolute;left:'+x+'px; top:'+y+'px; z-index:2;width:20px;height:20">');
i++;}
});
$('#container').on("click",".mark",function(e){
$(this).remove();
});
$('#kv_mark').on("click",".mark",function(e){
$(this).remove();
});
$("#kv_mark").dblclick(function(e){
a[i] = (e.pageX - this.offsetLeft)-17;
b[i] = (e.pageY - this.offsetTop)-17;
// console.log(a);
// console.log(b);
}) .correction-block{
width:100%;
position: relative;
}
.correction-block img{
width:100%;
}
.canvas-body{
position:relative;
/*top:0;
left:0;
height:100%;
width:100%;*/
}
.correction-block .canvas-container{
position: absolute!important;
top:0;
left:0;
width:100%!important;
height:100%!important;
border:1px solid #333;
}
.correction-block canvas{
position: absolute;
top:0;
left:0;
width:100%!important;
height:100%!important;
}
.relative{
position: relative;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.4.3/fabric.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container" class="relative">
<div class="correction-block">
<img src="{{ asset('img/scanned1.jpeg') }}" alt="" id="image">
<canvas id="kv_mark"> </canvas>
</div>
</div>javascript html5-canvas fabricjs
javascript html5-canvas fabricjs
asked Nov 20 '18 at 5:53
kritarthkritarth
62
asked Nov 20 '18 at 5:53
kritarthkritarth
62
edited Nov 20 '18 at 6:08
kritarth
asked Nov 20 '18 at 5:53
kritarthkritarth
62
asked Nov 20 '18 at 5:53
kritarthkritarth
62
asked Nov 20 '18 at 5:53
kritarthkritarth
62
62
can please add your code to jsfiddle? it is easy for others to provide solution.
– varit05
Nov 20 '18 at 6:05
add a comment |
can please add your code to jsfiddle? it is easy for others to provide solution.
– varit05
Nov 20 '18 at 6:05
can please add your code to jsfiddle? it is easy for others to provide solution.
– varit05
Nov 20 '18 at 6:05
can please add your code to jsfiddle? it is easy for others to provide solution.
– varit05
Nov 20 '18 at 6:05
add a comment |
1 Answer
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It depends what kind of eraser are you talking about. In case of you'd like to create an object with the eraser characteristic (i.e. a circle or a rect) you just have to add to it the property globalCompositeOperation = 'destination-out'.
If you want a freeDrawingBrush eraser, feel free to ask; at this moment this is not a feature in Fabric (version: '2.4.4') and you should hack the library to do it.
answered Nov 25 '18 at 17:05
ZappescuZappescu
1,0991724
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
It depends what kind of eraser are you talking about. In case of you'd like to create an object with the eraser characteristic (i.e. a circle or a rect) you just have to add to it the property globalCompositeOperation = 'destination-out'.
If you want a freeDrawingBrush eraser, feel free to ask; at this moment this is not a feature in Fabric (version: '2.4.4') and you should hack the library to do it.
answered Nov 25 '18 at 17:05
ZappescuZappescu
1,0991724
add a comment |
0
It depends what kind of eraser are you talking about. In case of you'd like to create an object with the eraser characteristic (i.e. a circle or a rect) you just have to add to it the property globalCompositeOperation = 'destination-out'.
If you want a freeDrawingBrush eraser, feel free to ask; at this moment this is not a feature in Fabric (version: '2.4.4') and you should hack the library to do it.
answered Nov 25 '18 at 17:05
ZappescuZappescu
1,0991724
add a comment |
0
0
0
It depends what kind of eraser are you talking about. In case of you'd like to create an object with the eraser characteristic (i.e. a circle or a rect) you just have to add to it the property globalCompositeOperation = 'destination-out'.
If you want a freeDrawingBrush eraser, feel free to ask; at this moment this is not a feature in Fabric (version: '2.4.4') and you should hack the library to do it.
answered Nov 25 '18 at 17:05
ZappescuZappescu
1,0991724
It depends what kind of eraser are you talking about. In case of you'd like to create an object with the eraser characteristic (i.e. a circle or a rect) you just have to add to it the property globalCompositeOperation = 'destination-out'.
If you want a freeDrawingBrush eraser, feel free to ask; at this moment this is not a feature in Fabric (version: '2.4.4') and you should hack the library to do it.
answered Nov 25 '18 at 17:05
ZappescuZappescu
1,0991724
answered Nov 25 '18 at 17:05
ZappescuZappescu
1,0991724
answered Nov 25 '18 at 17:05
ZappescuZappescu
1,0991724
answered Nov 25 '18 at 17:05
ZappescuZappescu
1,0991724
1,0991724
add a comment |
add a comment |
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can please add your code to jsfiddle? it is easy for others to provide solution.
– varit05
Nov 20 '18 at 6:05