更改在HTML5画布元素上绘制的图像的颜色。
为了更改在HTML5Canvas元素上绘制的图像的颜色，可以尝试运行以下代码。使用drawImage()方法-
function display(img1, red, gr, bl) { //func to change color of image
var canvas1 = document.createElement('canvas');//canvas element initialisation
canvas1.width = img.width;//canvas width initialisation
canvas1.height = img.height; //canvas height initialisation
var ctx1 = canvas1.getContext('2d');
ctx1.drawImage(img, 0, 0);
var myImg =ctx1.getImageData(0, 0, canvas1.width, canvas1.height);
for (var t=0;t< myImg.data.length;t+=4) {
myImg.data[t]= red | myImg.data[t];
myImg.data[t+1]= gr | myImg.data[t+1];
myImg.data[t+2]= bl | myImg.data[t+2];
}
ctx1.putImageData(myImg,0,0); // Image data is adjusted according to context
return c;
},