change particular area of an image and fill color in that area
Edit: Its Possible to get the image data from a canvas and change its pixels. You could also search for algorithms for drawing lines, circles and etc. But the ideia is still the same (Get a canvas image, Edit it, then save it).
Since you are using AngularJS, you can create a directive that gets the color as input and plots that color on a specific area of the image. Then you can use the canvas.toDataURL() or canvas2image() method to parse the canvas into an image with the desired format.
Check the MDN docs for this method here https://developer.mozilla.org/pt-BR/docs/Web/API/HTMLCanvasElement/toDataURL
I have made a small code snippet just to give you an ideia. I think that the color picker feature is a step that you can easely implement and deliver as input to your canvas directive. I hope that helps!
function hexToRgb(color) {
var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
color = color.replace(shorthandRegex, function(m, r, g, b) {
return r + r + g + g + b + b;
});
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(color);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16)
} : {
r: 0,
g: 0,
b: 0
};
}
function colorImage(imgId,hexaColor) {
// create hidden canvas (using image dimensions)
var imgElement = document.getElementById(imgId);
var canvas = document.createElement("canvas");
canvas.width = imgElement.width;
canvas.height = imgElement.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(imgElement,0,0);
var imageData = ctx.getImageData(0,0,canvas.width,canvas.height);
var data = imageData.data;
// convert image to grayscale
var rgbColor = hexToRgb(hexaColor);
//console.log(rgbColor);
for(var p = 0, len = data.length; p < len; p+=4) {
//if(data[p+3] == 0)
// continue;
data[p + 0] = rgbColor.r;
data[p + 1] = rgbColor.g;
data[p + 2] = rgbColor.b;
//data[p + 3] = 255;
}
ctx.putImageData(imageData, 0, 0);
// replace image source with canvas data
imgElement.src = canvas.toDataURL();
}
// changing color of capsule on select event
document.getElementById('sel_top').onchange = function(){
colorImage('img_top', this.value);
}
document.getElementById('sel_bottom').onchange = function(){
colorImage('img_bottom', this.value);
}
$('input[type="color"]').on("change", function(color) {
console.log(this.value);
var colorHex = this.value;
colorImage('img_top',colorHex);
});img.color-img {
position: absolute;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.slim.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tinyColorPicker/1.1.1/jqColorPicker.min.js"></script>
<label for="sel_top">top color: </label>
<select id="sel_top">
<option value="#ffffff">select</option>
<option value="#ff0000">red</option>
<option value="#00ff00">green</option>
<option value="#0000ff">blue</option>
<option value="#FCF153">yellow</option>
</select>
<label for="sel_top">bottom color: </label>
<select id="sel_bottom">
<option value="#ffffff">select</option>
<option value="#ff0000">red</option>
<option value="#00ff00">green</option>
<option value="#0000ff">blue</option>
<option value="#FCF153">yellow</option>
</select>
<div>
<input type="color" value="#ff0000" class="myColorPic">
</div>
<br><br>
<img src="data:image/png;base64,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" />
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<img src="data:image/png;base64,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" class="color-img" />Demo:
Full page: https://angularjs-rj88cu.stackblitz.io/
Code: https://stackblitz.com/edit/angularjs-rj88cu
Explanation:
The editor is an svg containing background image as <image> and areas as <path> both are created from editor.imageUrl and editor.areas
For downloading,
- Background image is drawn on a canvas
- SVG (without
<image>) is converted to dataUrl and then drawn on canvas - Canvas is converted to dataUrl for downloading
Why canvas was not used instead of svg in the first place?
Because mouse interaction are difficult to implement in canvas and is much easier in inline svg as the work like DOM elements (hover pseudo class, click events, etc)
Also I assumed you wanted angularjs because you have tagged it (even though you have not mentioned in the question)
Also there are a lot of bad practices in the code like editor not being a component and styling input[type=color]'s Shadow DOM (you can use some colorpicker plugin instead)
PS: Tell me if something needs to be changed