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content.js
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content.js
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var clickedTargetElement = null;
var enteredTargetEleemnt = null;
document.addEventListener("mousedown", function(event) {
if (event.button == 2) {
clickedTargetElement = event.target;
}
}, true);
document.addEventListener("mouseenter", function(event) {
enteredTargetEleemnt = event.target;
}, true);
function halfColorAnaglyph(imageDataLeft, imageDataRight) {
// clone the pixel array from original imageData
const originalArrayLeft = imageDataLeft.data;
const originalArrayRight = imageDataRight.data;
const newArray = new Uint8ClampedArray(originalArrayLeft);
for (let i = 0; i < originalArrayLeft.length; i += 4) {
newArray[i + 0] = 0.7* originalArrayLeft[i + 1] + 0.3* originalArrayLeft[i + 2]; // red 🔴
newArray[i + 1] = 1.0* originalArrayRight[i + 1] // green 🟢
newArray[i + 2] = 1.0 * originalArrayRight[i + 2];// blue 🔵
newArray[i + 3] = originalArrayLeft[i + 3] ;// alpha
}
// return a new ImageData object
return new ImageData(newArray, imageDataLeft.width, imageDataLeft.height);
}
function duboisAnaglyph(imageDataLeft, imageDataRight) {
// clone the pixel array from original imageData
const originalArrayLeft = imageDataLeft.data;
const originalArrayRight = imageDataRight.data;
const newArray = new Uint8ClampedArray(originalArrayLeft);
for (let i = 0; i < originalArrayLeft.length; i += 4) {
newArray[i + 0] = 0.456*originalArrayLeft[i + 0] + 0.500*originalArrayLeft[i + 1] + 0.176* originalArrayLeft[i + 2] + (-0.043)*originalArrayRight[i + 0] + (-0.088)*originalArrayRight[i + 1] + (-0.002)* originalArrayRight[i + 2]; // red 🔴
newArray[i + 1] = (-0.040)*originalArrayLeft[i + 0] + (-0.038)*originalArrayLeft[i + 1] + (-0.016)* originalArrayLeft[i + 2] + 0.378*originalArrayRight[i + 0] + 0.734*originalArrayRight[i + 1] + (-0.018)* originalArrayRight[i + 2]; // green 🟢
newArray[i + 2] = (-0.015)*originalArrayLeft[i + 0] + (-0.021)*originalArrayLeft[i + 1] + (-0.005)* originalArrayLeft[i + 2] + (-0.072)*originalArrayRight[i + 0] + (-0.113)*originalArrayRight[i + 1] + (1.226)*originalArrayRight[i + 2];;// blue 🔵
newArray[i + 3] = 0.5*originalArrayLeft[i + 3] + 0.5*originalArrayRight[i + 3] ;// alpha
}
// return a new ImageData object
return new ImageData(newArray, imageDataLeft.width, imageDataLeft.height);
}
function rcd2ri(cnv) {
var img = cnv.original3DImage;
var ctx = cnv.getContext("2d");
ctx.drawImage(img, 0, 0, cnv.width, cnv.height);
const imageDataRight = ctx.getImageData(0, 0, cnv.width/2, cnv.height);
const imageDataLeft = ctx.getImageData(cnv.width/2, 0, cnv.width/2, cnv.height);
const updatedImageData = duboisAnaglyph(imageDataLeft, imageDataRight);
ctx.clearRect(0, 0, cnv.width, cnv.height);
ctx.putImageData(updatedImageData, cnv.width /4, 0, 0, 0, cnv.width /2, cnv.height)
}
function rchc2ri(cnv) {
var img = cnv.original3DImage;
var ctx = cnv.getContext("2d");
ctx.drawImage(img, 0, 0, cnv.width, cnv.height);
const imageDataRight = ctx.getImageData(0, 0, cnv.width/2, cnv.height);
const imageDataLeft = ctx.getImageData(cnv.width/2, 0, cnv.width/2, cnv.height);
const updatedImageData = halfColorAnaglyph(imageDataLeft, imageDataRight);
ctx.clearRect(0, 0, cnv.width, cnv.height);
ctx.putImageData(updatedImageData, cnv.width /4, 0, 0, 0, cnv.width /2, cnv.height)
}
function crd2ri(cnv) {
var img = cnv.original3DImage;
var ctx = cnv.getContext("2d");
ctx.drawImage(img, 0, 0, cnv.width, cnv.height);
const imageDataLeft = ctx.getImageData(0, 0, cnv.width/2, cnv.height);
const imageDataRight = ctx.getImageData(cnv.width/2, 0, cnv.width/2, cnv.height);
const updatedImageData = duboisAnaglyph(imageDataLeft, imageDataRight);
ctx.clearRect(0, 0, cnv.width, cnv.height);
ctx.putImageData(updatedImageData, cnv.width /4, 0, 0, 0, cnv.width /2, cnv.height)
}
function crhc2ri(cnv) {
var img = cnv.original3DImage;
var ctx = cnv.getContext("2d");
ctx.drawImage(img, 0, 0, cnv.width, cnv.height);
const imageDataLeft = ctx.getImageData(0, 0, cnv.width/2, cnv.height);
const imageDataRight = ctx.getImageData(cnv.width/2, 0, cnv.width/2, cnv.height);
const updatedImageData = halfColorAnaglyph(imageDataLeft, imageDataRight);
ctx.clearRect(0, 0, cnv.width, cnv.height);
ctx.putImageData(updatedImageData, cnv.width /4, 0, 0, 0, cnv.width /2, cnv.height)
}
function refresh3DView() {
var eles = document.getElementsByTagName("CANVAS");
for (var i = 0; i < eles.length; i++) {
var cnv = eles[i];
if (cnv.hasOwnProperty("convert3DType")) {
switch (cnv.convert3DType) {
case "rcd2ri":
rcd2ri(cnv);
break;
case "rchc2ri":
rchc2ri(cnv);
break;
case "crd2ri":
crd2ri(cnv);
break;
case "crhc2ri":
crhc2ri(cnv);
break;
}
}
}
}
function restore3DImage(img, cnv) {
if (img.style.display == "none") {
img.style.display = cnv.style.display;
cnv.style.display = "none";
}
}
function convert3DImage(img, cnv, ct) {
if (!cnv) {
cnv = document.createElement("CANVAS");
cnv.original3DImage = img;
cnv.style.cssText = img.style.cssText;
cnv.className = img.className;
img.canvas3DView = cnv;
img.parentElement.insertBefore(cnv, img);
}
cnv.convert3DType = ct;
if (img.style.display != "none") {
cnv.width = img.offsetWidth;
cnv.height = img.offsetHeight;
cnv.style.display = img.style.display;
img.style.display = "none";
}
refresh3DView();
}
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
var targetElement;
switch (request["source"]) {
case "menu":
targetElement = clickedTargetElement;
break;
case "command":
targetElement = enteredTargetEleemnt;
break;
default:
return;
}
if (targetElement) {
var img = null;
var cnv = null;
if (targetElement.tagName == "IMG") {
img = targetElement;
if (img.hasOwnProperty("canvas3DView")) {
cnv = img.canvas3DView;
}
} else if (targetElement.tagName == "CANVAS") {
cnv = targetElement;
if (cnv.hasOwnProperty("original3DImage")) {
img = cnv.original3DImage;
}
}
if (request["from"] == "orig") {
if (img && cnv) {
restore3DImage(img, cnv);
}
} else {
if (img) {
convert3DImage(img, cnv, request["from"] + "2" + request["to"]);
}
}
}
});
window.onscroll = refresh3DView;