pixel-editor/js/_pixelEditorUtility.js
unsettledgames 927be7c310 Implemented save management
HAHA I was joking, I still had to make it save stuff. Ok, now I can only implement the history. It will take ages.
2020-06-23 23:10:56 +02:00

108 lines
3.2 KiB
JavaScript

function mergeLayers(belowLayer, topLayer) {
// Copying the above content on the layerBelow
let belowImageData = belowLayer.getImageData(0, 0, canvas.width, canvas.height);
let toMergeImageData = topLayer.getImageData(0, 0, canvas.width, canvas.height);
for (let i=0; i<belowImageData.data.length; i+=4) {
let currentMovePixel = [
toMergeImageData.data[i], toMergeImageData.data[i+1],
toMergeImageData.data[i+2], toMergeImageData.data[i+3]
];
let currentUnderlyingPixel = [
belowImageData.data[i], belowImageData.data[i+1],
belowImageData.data[i+2], belowImageData.data[i+3]
];
if (isPixelEmpty(currentMovePixel)) {
if (!isPixelEmpty(belowImageData)) {
toMergeImageData.data[i] = currentUnderlyingPixel[0];
toMergeImageData.data[i+1] = currentUnderlyingPixel[1];
toMergeImageData.data[i+2] = currentUnderlyingPixel[2];
toMergeImageData.data[i+3] = currentUnderlyingPixel[3];
}
}
}
belowLayer.putImageData(toMergeImageData, 0, 0);
}
function simulateInput(keyCode, ctrl, alt, shift) {
let keyboardEvent = document.createEvent("KeyboardEvent");
let initMethod = typeof keyboardEvent.initKeyboardEvent !== 'undefined' ? "initKeyboardEvent" : "initKeyEvent";
keyboardEvent[initMethod](
"keydown", // event type: keydown, keyup, keypress
true, // bubbles
true, // cancelable
window, // view: should be window
ctrl, // ctrlKey
alt, // altKey
shift, // shiftKey
false, // metaKey
keyCode, // keyCode: unsigned long - the virtual key code, else 0
keyCode // charCode: unsigned long - the Unicode character associated with the depressed key, else 0
);
document.dispatchEvent(keyboardEvent);
}
function isPixelEmpty(pixel) {
if (pixel == null || pixel === undefined) {
return false;
}
if ((pixel[0] == 0 && pixel[1] == 0 && pixel[2] == 0) || pixel[3] == 0) {
return true;
}
return false;
}
function isChildOfByClass(element, className) {
while (element != null && element.classList != null && !element.classList.contains(className)) {
element = element.parentElement;
}
if (element != null && element.classList != null && element.classList.contains(className)) {
return true;
}
return false;
}
function getEyedropperColor(cursorLocation) {
let max = -1;
let tmpColour;
let selectedColor;
for (let i=1; i<layers.length; i++) {
tmpColour = layers[i].context.getImageData(Math.floor(cursorLocation[0]/zoom),Math.floor(cursorLocation[1]/zoom),1,1).data;
if (layers[i].canvas.style.zIndex > max || isPixelEmpty(selectedColor) || selectedColor === undefined) {
max = layers[i].canvas.style.zIndex;
if (!isPixelEmpty(tmpColour)) {
selectedColor = tmpColour;
}
}
}
if (isPixelEmpty(tmpColour) && selectedColor === undefined) {
selectedColor = [0, 0, 0];
}
return selectedColor;
}
function getElementAbsolutePosition(element) {
let curleft = curtop = 0;
if (element.offsetParent) {
do {
curleft += element.offsetLeft;
curtop += element.offsetTop;
} while (element = element.offsetParent);
}
return [curleft,curtop];
}