pixel-editor/js/_move.js

89 lines
3.1 KiB
JavaScript
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var imageDataToMove;
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var originalDataPosition;
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var canMoveSelection = false;
var lastMovePos;
var selectionCanceled = true;
var firstTimeMove = true;
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// TODO: move with arrows
function updateMovePreview(mousePosition) {
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selectionCanceled = false;
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if (firstTimeMove) {
cutSelection(mousePosition);
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}
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firstTimeMove = false;
lastMousePos = mousePosition;
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// clear the entire tmp layer
TMPLayer.context.clearRect(0, 0, TMPLayer.canvas.width, TMPLayer.canvas.height);
// put the image data with offset
TMPLayer.context.putImageData(
imageDataToMove,
Math.round(lastMousePos[0] / zoom) - imageDataToMove.width / 2,
Math.round(lastMousePos[1] / zoom) - imageDataToMove.height / 2);
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lastMovePos = lastMousePos;
moveSelection(lastMousePos[0] / zoom, lastMousePos[1] / zoom, imageDataToMove.width, imageDataToMove.height);
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}
function endSelection() {
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TMPLayer.context.clearRect(0, 0, TMPLayer.canvas.width, TMPLayer.canvas.height);
VFXLayer.context.clearRect(0, 0, VFXLayer.canvas.width, VFXLayer.canvas.height);
let cleanImageData = new ImageData(endX - startX, endY - startY);
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if (imageDataToMove !== undefined) {
console.log("definito");
// Saving the current clipboard before editing it in order to merge it with the current layer
cleanImageData.data.set(imageDataToMove.data);
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let underlyingImageData = currentLayer.context.getImageData(startX, startY, endX - startX, endY - startY);
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for (let i=0; i<underlyingImageData.data.length; i+=4) {
let currentMovePixel = [
imageDataToMove.data[i], imageDataToMove.data[i+1],
imageDataToMove.data[i+2], imageDataToMove.data[i+3]
];
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let currentUnderlyingPixel = [
underlyingImageData.data[i], underlyingImageData.data[i+1],
underlyingImageData.data[i+2], underlyingImageData.data[i+3]
];
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if (isPixelEmpty(currentMovePixel)) {
if (!isPixelEmpty(underlyingImageData)) {
imageDataToMove.data[i] = currentUnderlyingPixel[0];
imageDataToMove.data[i+1] = currentUnderlyingPixel[1];
imageDataToMove.data[i+2] = currentUnderlyingPixel[2];
imageDataToMove.data[i+3] = currentUnderlyingPixel[3];
}
}
}
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if (lastMovePos !== undefined) {
currentLayer.context.putImageData(
imageDataToMove,
Math.round(lastMovePos[0] / zoom) - imageDataToMove.width / 2,
Math.round(lastMovePos[1] / zoom) - imageDataToMove.height / 2);
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}
else {
currentLayer.context.putImageData(
imageDataToMove,
copiedStartX,
copiedStartY);
}
imageDataToMove.data.set(cleanImageData.data);
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}
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selectionCanceled = true;
isRectSelecting = false;
firstTimeMove = true;
imageDataToMove = undefined;
isPasting = false;
isCutting = false;
lastMovePos = undefined;
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new HistoryStateEditCanvas();
}