How to draw picture in canvas in html5 using javascript?
How to draw picture in canvas in html5 using javascript?
1 answer
by
hal.littel ,
a year ago
@jerad
To draw a picture on a canvas using JavaScript in HTML5, follow these steps:
- Create a canvas element in your HTML file:
1
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<canvas id="myCanvas"></canvas> |
- In your JavaScript file or script tag, select the canvas element and get its 2D rendering context:
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var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
|
- Load the image using the Image() constructor and set its source:
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var image = new Image(); image.src = "path/to/image.jpg"; |
- When the image has loaded, use the drawImage() method to draw it on the canvas:
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image.onload = function() {
ctx.drawImage(image, x, y, width, height);
};
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Note: Replace x, y, width, height with the desired position and size for the image.
- Finally, call the drawImage() method in a button click event or any other event to trigger the drawing.
Here's an example of the complete code:
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<canvas id="myCanvas"></canvas>
<button onclick="drawImageOnCanvas()">Draw Image</button>
<script>
function drawImageOnCanvas() {
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
var image = new Image();
image.src = "path/to/image.jpg";
image.onload = function() {
ctx.drawImage(image, x, y, width, height);
};
}
</script>
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Replace "path/to/image.jpg" with the actual image file path you want to draw.