i have created a javascript canvas in which when user types a text, it will print on the image. the code is below:
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<style type="text/css">
canvas {
height: 500px;
width: 500px;
}
</style>
<div class="container">
<div style="margin-top: 5%;" class="row">
<div class="col-md-6"><canvas id="imageCanvas"></canvas></div>
<div class="col-md-6"><input type="text" id="name" placeholder="Name" /></div>
</div>
</div>
<script type="text/javascript">
var text_title = "Heading";
var canvas = document.getElementById('imageCanvas');
var ctx = canvas.getContext('2d');
var img = new Image();
// img.crossOrigin = "anonymous";
window.addEventListener('load', DrawPlaceholder)
function DrawPlaceholder() {
img.onload = function() {
DrawOverlay(img);
DrawText(text_title);
DynamicText(img)
};
img.src = 'card.png';
}
function DrawOverlay(img) {
ctx.drawImage(img, 0, 0, img.width, img.height, 0, 0, canvas.width, canvas.height);
ctx.fillStyle = 'rgba(230, 14, 14, 0)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
}
function DrawText(text) {
ctx.fillStyle = "black";
ctx.textBaseline = 'middle';
ctx.font = "50px 'Montserrat'";
ctx.fillText(text, 50, 50);
}
function DynamicText(img) {
document.getElementById('name').addEventListener('keyup', function() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
DrawOverlay(img);
text_title = this.value;
DrawText(text_title);
});
}
</script>everything is fine except the image. The image is not correctly coming in the canvas. Its being stretched or not getting its original size. i tried resizing the canvas and all. I want the original size of the image to appear as it is. Can anyone please tell me what should i do in my code to get the original size of the image. thanks in advance
ctx.drawImage(img, 0, 0);, instead of cropping the image.naturalWidth/Heightproperties of the image,widthandheightrepresent the presentation dimensions of the image placed on the page.