mirror of
https://github.com/lospec/pixel-editor.git
synced 2023-08-10 21:12:51 +03:00
702 lines
26 KiB
JavaScript
702 lines
26 KiB
JavaScript
class File {
|
|
// Canvas, canvas state
|
|
canvasSize = [];
|
|
zoom = 7;
|
|
canvasView = document.getElementById("canvas-view");
|
|
inited = false;
|
|
|
|
// Layers
|
|
layers = [];
|
|
currentLayer = undefined;
|
|
VFXLayer = undefined;
|
|
TMPLayer = undefined;
|
|
pixelGrid = undefined;
|
|
hSymmetricLayer = undefined;
|
|
vSymmetricLayer = undefined;
|
|
checkerBoard = undefined
|
|
|
|
// Canvas resize attributes
|
|
// Resize canvas pop up window
|
|
resizeCanvasContainer = document.getElementById("resize-canvas");
|
|
// Start pivot
|
|
rcPivot = "middle";
|
|
// Selected pivot button
|
|
currentPivotObject = undefined;
|
|
// Border offsets
|
|
rcBorders = {left: 0, right: 0, top: 0, bottom: 0};
|
|
|
|
// Sprite scaling attributes
|
|
// Should I keep the sprite ratio?
|
|
keepRatio = true;
|
|
// Used to store the current ratio
|
|
currentRatio = undefined;
|
|
// The currenty selected resizing algorithm (nearest-neighbor or bilinear-interpolation)
|
|
currentAlgo = 'nearest-neighbor';
|
|
// Current resize data
|
|
data = {width: 0, height: 0, widthPercentage: 100, heightPercentage: 100};
|
|
// Start resize data
|
|
startData = {width: 0, height:0, widthPercentage: 100, heightPercentage: 100};
|
|
|
|
|
|
openResizeCanvasWindow() {
|
|
if (!this.inited) {
|
|
this.initResizeCanvasInputs();
|
|
this.inited = true;
|
|
}
|
|
// Initializes the inputs
|
|
Dialogue.showDialogue('resize-canvas');
|
|
}
|
|
|
|
initResizeCanvasInputs() {
|
|
// Getting the pivot buttons
|
|
let buttons = document.getElementsByClassName("pivot-button");
|
|
|
|
// Adding the event handlers for them
|
|
for (let i=0; i<buttons.length; i++) {
|
|
Events.on("click", buttons[i], this.changePivot.bind(this));
|
|
if (buttons[i].getAttribute("value").includes("middle")) {
|
|
this.currentPivotObject = buttons[i];
|
|
}
|
|
}
|
|
|
|
document.getElementById("rc-width").value = currFile.canvasSize[0];
|
|
document.getElementById("rc-height").value = currFile.canvasSize[1];
|
|
|
|
Events.on("change", "rc-border-left", this.rcChangedBorder.bind(this));
|
|
Events.on("change", "rc-border-right", this.rcChangedBorder.bind(this));
|
|
Events.on("change", "rc-border-top", this.rcChangedBorder.bind(this));
|
|
Events.on("change", "rc-border-bottom", this.rcChangedBorder.bind(this));
|
|
|
|
Events.on("change", "rc-width", this.rcChangedSize.bind(this));
|
|
Events.on("change", "rc-height", this.rcChangedSize.bind(this));
|
|
|
|
Events.on("click", "resize-canvas-confirm", this.resizeCanvas.bind(this));
|
|
}
|
|
|
|
/** Fired when a border offset is changed: it updates the width and height
|
|
*/
|
|
rcChangedBorder() {
|
|
this.rcUpdateBorders();
|
|
|
|
document.getElementById("rc-width").value = parseInt(currFile.canvasSize[0]) +
|
|
this.rcBorders.left + this.rcBorders.right;
|
|
document.getElementById("rc-height").value = parseInt(currFile.canvasSize[1]) +
|
|
this.rcBorders.top + this.rcBorders.bottom;
|
|
}
|
|
|
|
/** Fired when width or height are changed: updates the border offsets
|
|
*/
|
|
rcChangedSize() {
|
|
let widthOffset = Math.abs(document.getElementById("rc-width").value) - currFile.canvasSize[0];
|
|
let heightOffset = Math.abs(document.getElementById("rc-height").value) - currFile.canvasSize[1];
|
|
|
|
let left = Math.round(widthOffset / 2);
|
|
let right = widthOffset - left;
|
|
let top = Math.round(heightOffset / 2);
|
|
let bottom = heightOffset - top;
|
|
|
|
document.getElementById("rc-border-left").value = left;
|
|
document.getElementById("rc-border-right").value = right;
|
|
document.getElementById("rc-border-top").value = top;
|
|
document.getElementById("rc-border-bottom").value = bottom;
|
|
|
|
this.rcBorders.left = left;
|
|
this.rcBorders.right = right;
|
|
this.rcBorders.top = top;
|
|
this.rcBorders.bottom = bottom;
|
|
}
|
|
|
|
/** Resizes the canvas
|
|
*
|
|
* @param {*} event The event that triggered the canvas resizing
|
|
* @param {*} size The new size of the picture
|
|
* @param {*} customData Used when ctrl+z ing
|
|
* @param {*} saveHistory Should I save the history? You shouldn't if you're undoing
|
|
*/
|
|
resizeCanvas(event, size, customData, saveHistory = true) {
|
|
let imageDatas = [];
|
|
let leftOffset = 0;
|
|
let topOffset = 0;
|
|
let copiedDataIndex = 0;
|
|
|
|
// If I'm undoing and I'm not trimming, I manually put the values in the window
|
|
if (size != null && customData == null) {
|
|
document.getElementById("rc-width").value = size.x;
|
|
document.getElementById("rc-height").value = size.y;
|
|
|
|
this.rcChangedSize();
|
|
}
|
|
|
|
this.rcUpdateBorders();
|
|
|
|
// Save all imageDatas
|
|
for (let i=0; i<currFile.layers.length; i++) {
|
|
if (currFile.layers[i].hasCanvas()) {
|
|
imageDatas.push(currFile.layers[i].context.getImageData(
|
|
0, 0, currFile.canvasSize[0], currFile.canvasSize[1])
|
|
);
|
|
}
|
|
}
|
|
|
|
// Saving the history only if I'm not already undoing or redoing
|
|
if (saveHistory && event != null) {
|
|
// Saving history
|
|
new HistoryState().ResizeCanvas(
|
|
{x: parseInt(currFile.canvasSize[0]) + this.rcBorders.left + this.rcBorders.right,
|
|
y: parseInt(currFile.canvasSize[1]) + this.rcBorders.top + this.rcBorders.bottom},
|
|
|
|
{x: currFile.canvasSize[0],
|
|
y: currFile.canvasSize[1]},
|
|
imageDatas.slice(), customData != null && saveHistory
|
|
);
|
|
}
|
|
|
|
currFile.canvasSize[0] = parseInt(currFile.canvasSize[0]) +
|
|
this.rcBorders.left + this.rcBorders.right;
|
|
currFile.canvasSize[1] = parseInt(currFile.canvasSize[1]) +
|
|
this.rcBorders.top + this.rcBorders.bottom;
|
|
|
|
console.trace();
|
|
console.log(currFile.canvasSize);
|
|
|
|
// Resize the canvases
|
|
for (let i=0; i<currFile.layers.length; i++) {
|
|
currFile.layers[i].canvas.width = currFile.canvasSize[0];
|
|
currFile.layers[i].canvas.height = currFile.canvasSize[1];
|
|
|
|
currFile.layers[i].resize();
|
|
}
|
|
|
|
// Regenerate the checkerboard
|
|
currFile.checkerBoard.fillCheckerboard();
|
|
currFile.pixelGrid.fillPixelGrid();
|
|
currFile.hSymmetricLayer.fillAxis();
|
|
currFile.vSymmetricLayer.fillAxis();
|
|
// Put the imageDatas in the right position
|
|
switch (this.rcPivot)
|
|
{
|
|
case 'topleft':
|
|
leftOffset = 0;
|
|
topOffset = 0;
|
|
break;
|
|
case 'top':
|
|
leftOffset = (this.rcBorders.left + this.rcBorders.right) / 2;
|
|
topOffset = 0;
|
|
break;
|
|
case 'topright':
|
|
leftOffset = this.rcBorders.left + this.rcBorders.right;
|
|
topOffset = 0;
|
|
break;
|
|
case 'left':
|
|
leftOffset = 0;
|
|
topOffset = (this.rcBorders.top + this.rcBorders.bottom) / 2;
|
|
break;
|
|
case 'middle':
|
|
leftOffset = (this.rcBorders.left + this.rcBorders.right) / 2;
|
|
topOffset = (this.rcBorders.top + this.rcBorders.bottom) / 2;
|
|
break;
|
|
case 'right':
|
|
leftOffset = this.rcBorders.left + this.rcBorders.right;
|
|
topOffset = (this.rcBorders.top + this.rcBorders.bottom) / 2;
|
|
break;
|
|
case 'bottomleft':
|
|
leftOffset = 0;
|
|
topOffset = this.rcBorders.top + this.rcBorders.bottom;
|
|
break;
|
|
case 'bottom':
|
|
leftOffset = (this.rcBorders.left + this.rcBorders.right) / 2;
|
|
topOffset = this.rcBorders.top + this.rcBorders.bottom;
|
|
break;
|
|
case 'bottomright':
|
|
leftOffset = this.rcBorders.left + this.rcBorders.right;
|
|
topOffset = this.rcBorders.top + this.rcBorders.bottom;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Putting all the data for each layer with the right offsets (decided by the pivot)
|
|
for (let i=0; i<currFile.layers.length; i++) {
|
|
if (currFile.layers[i].hasCanvas()) {
|
|
if (customData == undefined) {
|
|
currFile.layers[i].context.putImageData(imageDatas[copiedDataIndex], leftOffset, topOffset);
|
|
}
|
|
else {
|
|
currFile.layers[i].context.putImageData(customData[copiedDataIndex], 0, 0);
|
|
}
|
|
currFile.layers[i].updateLayerPreview();
|
|
copiedDataIndex++;
|
|
}
|
|
}
|
|
|
|
Dialogue.closeDialogue();
|
|
}
|
|
|
|
/** Trims the canvas so tat the sprite is perfectly contained in it
|
|
*
|
|
* @param {*} event
|
|
* @param {*} saveHistory Should I save the history? You shouldn't if you're undoing
|
|
*/
|
|
trimCanvas(event, saveHistory) {
|
|
let minY = Infinity;
|
|
let minX = Infinity;
|
|
let maxX = -Infinity;
|
|
let maxY = -Infinity;
|
|
let tmp;
|
|
let imageDatas = [];
|
|
let historySave = saveHistory == null;
|
|
let prevPivot = rcPivot;
|
|
|
|
this.rcPivot = "topleft";
|
|
|
|
// Computing the min and max coordinates in which there's a non empty pixel
|
|
for (let i=1; i<currFile.layers.length - nAppLayers; i++) {
|
|
let imageData = currFile.layers[i].context.getImageData(0, 0, currFile.canvasSize[0], currFile.canvasSize[1]);
|
|
let pixelPosition;
|
|
|
|
for (let i=imageData.data.length - 1; i>= 0; i-=4) {
|
|
if (!Util.isPixelEmpty(
|
|
[imageData.data[i - 3], imageData.data[i - 2],
|
|
-imageData.data[i - 1], imageData.data[i]])) {
|
|
pixelPosition = getPixelPosition(i);
|
|
|
|
// max x
|
|
if (pixelPosition[0] > maxX) {
|
|
maxX = pixelPosition[0];
|
|
}
|
|
// min x
|
|
if (pixelPosition[0] < minX) {
|
|
minX = pixelPosition[0];
|
|
}
|
|
// max y
|
|
if (pixelPosition[1] > maxY) {
|
|
maxY = pixelPosition[1];
|
|
}
|
|
// min y
|
|
if (pixelPosition[1] < minY) {
|
|
minY = pixelPosition[1];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
tmp = minY;
|
|
minY = maxY;
|
|
maxY = tmp;
|
|
|
|
minY = currFile.canvasSize[1] - minY;
|
|
maxY = currFile.canvasSize[1] - maxY;
|
|
|
|
// Setting the borders coherently with the values I've just computed
|
|
this.rcBorders.right = (maxX - currFile.canvasSize[0]) + 1;
|
|
this.rcBorders.left = -minX;
|
|
this.rcBorders.top = maxY - currFile.canvasSize[1] + 1;
|
|
this.rcBorders.bottom = -minY;
|
|
|
|
// Saving the data
|
|
for (let i=0; i<currFile.layers.length; i++) {
|
|
if (currFile.layers[i].hasCanvas()) {
|
|
imageDatas.push(currFile.layers[i].context.getImageData(minX - 1, currFile.layers[i].canvasSize[1] - maxY, maxX-minX + 1, maxY-minY + 1));
|
|
}
|
|
}
|
|
|
|
//console.log("sx: " + borders.left + "dx: " + borders.right + "top: " + borders.top + "btm: " + borders.bottom);
|
|
|
|
document.getElementById("rc-border-left").value = this.rcBorders.left;
|
|
document.getElementById("rc-border-right").value = this.rcBorders.right;
|
|
document.getElementById("rc-border-top").value = this.rcBorders.top;
|
|
document.getElementById("rc-border-bottom").value = this.rcBorders.bottom;
|
|
|
|
// Resizing the canvas with the decided border offsets
|
|
this.resizeCanvas(null, null, imageDatas.slice(), historySave);
|
|
// Resetting the previous pivot
|
|
this.rcPivot = prevPivot;
|
|
}
|
|
|
|
rcUpdateBorders() {
|
|
// Getting input
|
|
this.rcBorders.left = document.getElementById("rc-border-left").value;
|
|
this.rcBorders.right = document.getElementById("rc-border-right").value;
|
|
this.rcBorders.top = document.getElementById("rc-border-top").value;
|
|
this.rcBorders.bottom = document.getElementById("rc-border-bottom").value;
|
|
|
|
// Validating input
|
|
this.rcBorders.left == "" ? this.rcBorders.left = 0 : this.rcBorders.left = Math.round(parseInt(this.rcBorders.left));
|
|
this.rcBorders.right == "" ? this.rcBorders.right = 0 : this.rcBorders.right = Math.round(parseInt(this.rcBorders.right));
|
|
this.rcBorders.top == "" ? this.rcBorders.top = 0 : this.rcBorders.top = Math.round(parseInt(this.rcBorders.top));
|
|
this.rcBorders.bottom == "" ? this.rcBorders.bottom = 0 : this.rcBorders.bottom = Math.round(parseInt(this.rcBorders.bottom));
|
|
}
|
|
|
|
changePivot(event) {
|
|
this.rcPivot = event.target.getAttribute("value");
|
|
|
|
// Setting the selected class
|
|
this.currentPivotObject.classList.remove("rc-selected-pivot");
|
|
this.currentPivotObject = event.target;
|
|
this.currentPivotObject.classList.add("rc-selected-pivot");
|
|
}
|
|
|
|
/** Opens the sprite resizing window
|
|
*
|
|
*/
|
|
openResizeSpriteWindow() {
|
|
// Inits the sprie resize inputs
|
|
this.initResizeSpriteInputs();
|
|
|
|
// Computing the current ratio
|
|
this.currentRatio = currFile.canvasSize[0] / currFile.canvasSize[1];
|
|
|
|
// Initializing the input fields
|
|
this.data.width = currFile.canvasSize[0];
|
|
this.data.height = currFile.canvasSize[1];
|
|
|
|
this.startData.width = parseInt(this.data.width);
|
|
this.startData.height = parseInt(this.data.height);
|
|
this.startData.heightPercentage = 100;
|
|
this.startData.widthPercentage = 100;
|
|
|
|
// Opening the pop up now that it's ready
|
|
Dialogue.showDialogue('resize-sprite');
|
|
}
|
|
|
|
/** Initalizes the input values and binds the elements to their events
|
|
*
|
|
*/
|
|
initResizeSpriteInputs() {
|
|
document.getElementById("rs-width").value = currFile.canvasSize[0];
|
|
document.getElementById("rs-height").value = currFile.canvasSize[1];
|
|
|
|
document.getElementById("rs-width-percentage").value = 100;
|
|
document.getElementById("rs-height-percentage").value = 100;
|
|
|
|
document.getElementById("rs-keep-ratio").checked = true;
|
|
|
|
Events.on("change", "rs-width", this.changedWidth.bind(this));
|
|
Events.on("change", "rs-height", this.changedHeight.bind(this));
|
|
|
|
Events.on("change", "rs-width-percentage", this.changedWidthPercentage.bind(this));
|
|
Events.on("change", "rs-height-percentage", this.changedHeightPercentage.bind(this));
|
|
|
|
Events.on("click", "resize-sprite-confirm", this.resizeSprite.bind(this));
|
|
Events.on("click", "rs-keep-ratio", this.toggleRatio.bind(this));
|
|
Events.on("change", "resize-algorithm-combobox", this.changedAlgorithm.bind(this));
|
|
}
|
|
|
|
/** Resizes (scales) the sprite
|
|
*
|
|
* @param {*} event
|
|
* @param {*} ratio Keeps infos about the x ratio and y ratio
|
|
*/
|
|
resizeSprite(event, ratio) {
|
|
// Old data
|
|
let oldWidth, oldHeight;
|
|
// New data
|
|
let newWidth, newHeight;
|
|
// Current imageDatas
|
|
let rsImageDatas = [];
|
|
// Index that will be used a few lines below
|
|
let layerIndex = 0;
|
|
// Copy of the imageDatas that will be stored in the history
|
|
let imageDatasCopy = [];
|
|
|
|
oldWidth = currFile.canvasSize[0];
|
|
oldHeight = currFile.canvasSize[1];
|
|
this.rcPivot = "middle";
|
|
|
|
// Updating values if the user didn't press enter
|
|
switch (document.activeElement.id) {
|
|
case "rs-width-percentage":
|
|
this.changedWidthPercentage();
|
|
break;
|
|
case "rs-width":
|
|
this.changedWidth();
|
|
break;
|
|
case "rs-height-percentage":
|
|
this.changedHeightPercentage();
|
|
break;
|
|
case "rs-height":
|
|
this.changedHeight();
|
|
break;
|
|
default:
|
|
// In this case everything has been updated correctly
|
|
break;
|
|
}
|
|
|
|
// Computing newWidth and newHeight
|
|
if (ratio == null) {
|
|
newWidth = this.data.width;
|
|
newHeight = this.data.height;
|
|
}
|
|
else {
|
|
newWidth = currFile.canvasSize[0] * ratio[0];
|
|
newHeight = currFile.canvasSize[1] * ratio[1];
|
|
}
|
|
|
|
// Get all the image datas
|
|
for (let i=0; i<currFile.layers.length; i++) {
|
|
if (currFile.layers[i].hasCanvas()) {
|
|
rsImageDatas.push(currFile.layers[i].context.getImageData(
|
|
0, 0, currFile.canvasSize[0], currFile.canvasSize[1])
|
|
);
|
|
}
|
|
}
|
|
|
|
// event is null when the user is undoing
|
|
if (event != null) {
|
|
// Copying the image data
|
|
imageDatasCopy = rsImageDatas.slice();
|
|
// Saving the history
|
|
new HistoryState().ResizeSprite(newWidth / oldWidth, newHeight / oldHeight, this.currentAlgo, imageDatasCopy);
|
|
}
|
|
|
|
// Resizing the canvas
|
|
currFile.resizeCanvas(null, {x: newWidth, y: newHeight});
|
|
|
|
// Put the image datas on the new canvases
|
|
for (let i=0; i<currFile.layers.length; i++) {
|
|
if (currFile.layers[i].hasCanvas()) {
|
|
currFile.layers[i].context.putImageData(
|
|
this.resizeImageData(rsImageDatas[layerIndex], newWidth, newHeight, this.currentAlgo), 0, 0
|
|
);
|
|
currFile.layers[i].updateLayerPreview();
|
|
layerIndex++;
|
|
}
|
|
}
|
|
|
|
// Updating start values when I finish scaling the sprite
|
|
// OPTIMIZABLE? Can't I just assign data to startData? Is js smart enough to understand?
|
|
if (ratio == null) {
|
|
this.startData.width = this.data.width;
|
|
this.startData.height = this.data.height;
|
|
}
|
|
else {
|
|
this.startData.width = currFile.canvasSize[0];
|
|
this.startData.height = currFile.canvasSize[1];
|
|
}
|
|
|
|
this.startData.widthPercentage = 100;
|
|
this.startData.heightPercentage = 100;
|
|
|
|
Dialogue.closeDialogue();
|
|
}
|
|
|
|
/* Trust me, the math for the functions below works. If you want to optimize them feel free to have a look, though */
|
|
/** Fired when the input field for width is changed. Updates th othe input fields consequently
|
|
*
|
|
* @param {*} event
|
|
*/
|
|
changedWidth(event) {
|
|
let newHeight, newHeightPerc, newWidthPerc;
|
|
this.data.width = event.target.value;
|
|
|
|
newHeight = this.data.width / this.currentRatio;
|
|
newHeightPerc = (newHeight * 100) / this.startData.height;
|
|
newWidthPerc = (this.data.width * 100) / this.startData.width;
|
|
|
|
if (this.keepRatio) {
|
|
document.getElementById("rs-height").value = newHeight;
|
|
this.data.height = newHeight;
|
|
|
|
document.getElementById("rs-height-percentage").value = newHeightPerc;
|
|
this.data.heightPercentage = newHeightPerc;
|
|
}
|
|
|
|
document.getElementById("rs-width-percentage").value = newWidthPerc;
|
|
}
|
|
|
|
/**Fired when the input field for width is changed. Updates the other input fields consequently
|
|
*
|
|
* @param {*} event
|
|
*/
|
|
changedHeight(event) {
|
|
let newWidth, newWidthPerc, newHeightPerc;
|
|
this.data.height = event.target.value;
|
|
|
|
newWidth = this.data.height * this.currentRatio;
|
|
newWidthPerc = (newWidth * 100) / this.startData.width;
|
|
newHeightPerc = (this.data.height * 100) / this.startData.height;
|
|
|
|
if (this.keepRatio) {
|
|
document.getElementById("rs-width").value = newWidth;
|
|
this.data.width = newWidth;
|
|
|
|
document.getElementById("rs-width-percentage").value = newWidthPerc;
|
|
this.data.widthPercentage = newWidthPerc;
|
|
}
|
|
|
|
document.getElementById("rs-height-percentage").value = newHeightPerc;
|
|
this.data.heightPercentage = newHeightPerc;
|
|
}
|
|
|
|
/**Fired when the input field for width percentage is changed. Updates the other input fields consequently
|
|
*
|
|
* @param {*} event
|
|
*/
|
|
changedWidthPercentage(event) {
|
|
let oldValue = 100;
|
|
let ratio;
|
|
let newWidth, newHeight, newHeightPerc;
|
|
|
|
this.data.widthPercentage = event.target.value;
|
|
ratio = this.data.widthPercentage / oldValue;
|
|
|
|
newHeight = this.startData.height * ratio;
|
|
newHeightPerc = this.data.widthPercentage;
|
|
newWidth = this.startData.width * ratio;
|
|
|
|
if (this.keepRatio) {
|
|
document.getElementById("rs-height-percentage").value = newHeightPerc;
|
|
this.data.heightPercentage = newHeightPerc;
|
|
|
|
document.getElementById("rs-height").value = newHeight
|
|
this.data.height = newHeight;
|
|
}
|
|
|
|
document.getElementById("rs-width").value = newWidth;
|
|
this.data.width = newWidth;
|
|
}
|
|
|
|
/**Fired when the input field for height percentage is changed. Updates the other input fields consequently
|
|
*
|
|
* @param {*} event
|
|
*/
|
|
changedHeightPercentage(event) {
|
|
let oldValue = this.data.heightPercentage;
|
|
let ratio;
|
|
let newHeight, newWidth, newWidthPerc;
|
|
|
|
this.data.heightPercentage = event.target.value;
|
|
|
|
ratio = this.data.heightPercentage / oldValue;
|
|
|
|
newWidth = this.startData.width * ratio;
|
|
newWidthPerc = this.data.heightPercentage;
|
|
newHeight = this.startData.height * ratio;
|
|
|
|
if (this.keepRatio) {
|
|
document.getElementById("rs-width-percentage").value = this.data.heightPercentage * currentRatio;
|
|
this.data.widthPercentage = newWidthPerc;
|
|
|
|
document.getElementById("rs-width").value = newWidth;
|
|
this.data.width = newWidth;
|
|
}
|
|
|
|
document.getElementById("rs-height").value = newHeight;
|
|
this.data.height = newHeight;
|
|
}
|
|
|
|
/** Toggles the keepRatio value (fired by the checkbox in the pop up window)
|
|
*/
|
|
toggleRatio() {
|
|
this.keepRatio = !this.keepRatio;
|
|
}
|
|
|
|
/** Changes the scaling algorithm (fired by the combobox in the pop up window)
|
|
*
|
|
* @param {*} event
|
|
*/
|
|
changedAlgorithm(event) {
|
|
this.currentAlgo = event.target.value;
|
|
}
|
|
|
|
/** Resizes an imageData depending on the algorithm and on the new width and height
|
|
*
|
|
* @param {*} image The imageData to scale
|
|
* @param {*} width The new width of the imageData
|
|
* @param {*} height The new height of the imageData
|
|
* @param {*} algorithm Scaling algorithm chosen by the user in the dialogue
|
|
*/
|
|
resizeImageData (image, width, height, algorithm) {
|
|
algorithm = algorithm || 'bilinear-interpolation'
|
|
|
|
let resize;
|
|
switch (algorithm) {
|
|
case 'nearest-neighbor': resize = this.nearestNeighbor; break
|
|
case 'bilinear-interpolation': resize = this.bilinearInterpolation; break
|
|
default: return image;
|
|
}
|
|
|
|
const result = new ImageData(width, height)
|
|
|
|
resize(image, result)
|
|
|
|
return result
|
|
}
|
|
|
|
|
|
/** Nearest neighbor algorithm to scale a sprite
|
|
*
|
|
* @param {*} src The source imageData
|
|
* @param {*} dst The destination imageData
|
|
*/
|
|
nearestNeighbor (src, dst) {
|
|
let pos = 0
|
|
|
|
// Just applying the nearest neighbor algorithm
|
|
for (let y = 0; y < dst.height; y++) {
|
|
for (let x = 0; x < dst.width; x++) {
|
|
const srcX = Math.floor(x * src.width / dst.width)
|
|
const srcY = Math.floor(y * src.height / dst.height)
|
|
|
|
let srcPos = ((srcY * src.width) + srcX) * 4
|
|
|
|
dst.data[pos++] = src.data[srcPos++] // R
|
|
dst.data[pos++] = src.data[srcPos++] // G
|
|
dst.data[pos++] = src.data[srcPos++] // B
|
|
dst.data[pos++] = src.data[srcPos++] // A
|
|
}
|
|
}
|
|
}
|
|
|
|
/** Bilinear interpolation used to scale a sprite
|
|
*
|
|
* @param {*} src The source imageData
|
|
* @param {*} dst The destination imageData
|
|
*/
|
|
bilinearInterpolation (src, dst) {
|
|
// Applying the bilinear interpolation algorithm
|
|
|
|
function interpolate (k, kMin, kMax, vMin, vMax) {
|
|
return Math.round((k - kMin) * vMax + (kMax - k) * vMin)
|
|
}
|
|
|
|
function interpolateHorizontal (offset, x, y, xMin, xMax) {
|
|
const vMin = src.data[((y * src.width + xMin) * 4) + offset]
|
|
if (xMin === xMax) return vMin
|
|
|
|
const vMax = src.data[((y * src.width + xMax) * 4) + offset]
|
|
return interpolate(x, xMin, xMax, vMin, vMax)
|
|
}
|
|
|
|
function interpolateVertical (offset, x, xMin, xMax, y, yMin, yMax) {
|
|
const vMin = interpolateHorizontal(offset, x, yMin, xMin, xMax)
|
|
if (yMin === yMax) return vMin
|
|
|
|
const vMax = interpolateHorizontal(offset, x, yMax, xMin, xMax)
|
|
return interpolate(y, yMin, yMax, vMin, vMax)
|
|
}
|
|
|
|
let pos = 0
|
|
|
|
for (let y = 0; y < dst.height; y++) {
|
|
for (let x = 0; x < dst.width; x++) {
|
|
const srcX = x * src.width / dst.width
|
|
const srcY = y * src.height / dst.height
|
|
|
|
const xMin = Math.floor(srcX)
|
|
const yMin = Math.floor(srcY)
|
|
|
|
const xMax = Math.min(Math.ceil(srcX), src.width - 1)
|
|
const yMax = Math.min(Math.ceil(srcY), src.height - 1)
|
|
|
|
dst.data[pos++] = interpolateVertical(0, srcX, xMin, xMax, srcY, yMin, yMax) // R
|
|
dst.data[pos++] = interpolateVertical(1, srcX, xMin, xMax, srcY, yMin, yMax) // G
|
|
dst.data[pos++] = interpolateVertical(2, srcX, xMin, xMax, srcY, yMin, yMax) // B
|
|
dst.data[pos++] = interpolateVertical(3, srcX, xMin, xMax, srcY, yMin, yMax) // A
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
let currFile = new File(); |