276 lines
11 KiB
JavaScript
276 lines
11 KiB
JavaScript
class SelectionTool extends Tool {
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switchFunc = undefined;
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moveTool = undefined;
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boundingBox = {minX: 9999999, maxX: -1, minY: 9999999, maxY: -1};
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currSelection = {};
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outlineData = undefined;
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previewData = undefined;
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selectedPixel = undefined;
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moveOffset = [0, 0];
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boundingBoxCenter = [0,0];
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reconstruct = {left:false, right:false, top:false, bottom:false};
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constructor(name, options, switchFunc, moveTool) {
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super(name, options);
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this.moveTool = moveTool;
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this.switchFunc = switchFunc;
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}
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onStart(mousePos, mouseTarget) {
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super.onStart(mousePos);
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if (mouseTarget == undefined || Util.isChildOfByClass(mouseTarget, "editor-top-menu") ||
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!Util.cursorInCanvas(currFile.canvasSize, [mousePos[0]/currFile.zoom, mousePos[1]/currFile.zoom]))
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return;
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// Putting the vfx layer on top of everything
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currFile.VFXLayer.canvas.style.zIndex = MAX_Z_INDEX;
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currFile.VFXLayer.context.fillStyle = "rgba(0,0,0,1)";
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this.startMousePos = [Math.floor(mousePos[0] / currFile.zoom),
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Math.floor(mousePos[1] / currFile.zoom)];
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this.endMousePos = [this.startMousePos[0], this.startMousePos[1]];
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let mouseX = mousePos[0] / currFile.zoom;
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let mouseY = mousePos[1] / currFile.zoom;
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this.boundingBox = {minX: 9999999, maxX: -1, minY: 9999999, maxY: -1};
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this.reconstruct = {left:false, right:false, top:false, bottom:false};
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this.currSelection = {};
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this.moveOffset = [0, 0];
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this.updateBoundingBox(Math.min(Math.max(mouseX, 0), currFile.canvasSize[0]-1),
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Math.min(Math.max(mouseY, 0), currFile.canvasSize[1]-1));
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}
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onDrag(mousePos) {
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super.onDrag(mousePos);
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let mouseX = mousePos[0] / currFile.zoom;
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let mouseY = mousePos[1] / currFile.zoom;
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if (mouseX > currFile.canvasSize[0])
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this.reconstruct.right = true;
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else if (mouseX < 0)
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this.reconstruct.left = true;
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if (mouseY > currFile.canvasSize[1])
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this.reconstruct.bottom = true;
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else if (mouseY < 0)
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this.reconstruct.top = true;
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if (Util.cursorInCanvas(currFile.canvasSize, [mousePos[0]/currFile.zoom, mousePos[1]/currFile.zoom])) {
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this.updateBoundingBox(Math.min(Math.max(mouseX, 0), currFile.canvasSize[0]-1),
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Math.min(Math.max(mouseY, 0), currFile.canvasSize[1]-1));
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}
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}
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onEnd(mousePos, mouseTarget) {
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super.onEnd(mousePos);
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if (mouseTarget == undefined || Util.isChildOfByClass(mouseTarget, "editor-top-menu"))
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return;
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let mouseX = mousePos[0] / currFile.zoom;
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let mouseY = mousePos[1] / currFile.zoom;
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if (Util.cursorInCanvas(currFile.canvasSize, [mousePos[0]/currFile.zoom, mousePos[1]/currFile.zoom])) {
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this.updateBoundingBox(Math.min(Math.max(mouseX, 0), currFile.canvasSize[0]-1),
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Math.min(Math.max(mouseY, 0), currFile.canvasSize[1]-1));
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}
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this.boundingBoxCenter = [this.boundingBox.minX + (this.boundingBox.maxX - this.boundingBox.minX) / 2,
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this.boundingBox.minY + (this.boundingBox.maxY - this.boundingBox.minY) / 2];
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}
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cutSelection() {
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let currLayerData = currFile.currentLayer.context.getImageData(0, 0, currFile.canvasSize[0], currFile.canvasSize[1]).data;
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// Save the selected pixels so that they can be moved and pasted back in the right place
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for (const key in this.currSelection) {
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let x = parseInt(key.split(",")[0]);
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let y = parseInt(key.split(",")[1]);
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let index = (y * currFile.canvasSize[0] + x) * 4;
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for (let i=0; i<4; i++) {
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// Save the pixel
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this.previewData.data[index + i] = currLayerData[index + i];
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// Delete the data below
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currLayerData[index + i] = 0;
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}
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}
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currFile.currentLayer.context.putImageData(new ImageData(currLayerData, currFile.canvasSize[0]), 0, 0);
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}
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pasteSelection(){
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if (this.currSelection == undefined)
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return;
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// I have to save the underlying data, so that the transparent pixels in the clipboard
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// don't override the coloured pixels in the canvas
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let underlyingImageData = currFile.currentLayer.context.getImageData(0, 0, currFile.canvasSize[0], currFile.canvasSize[1]);
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let pasteData = currFile.TMPLayer.context.getImageData(0, 0, currFile.canvasSize[0], currFile.canvasSize[1]);
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// Clearing the tmp (move preview) and vfx (ants) layers
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currFile.TMPLayer.context.clearRect(0, 0, currFile.canvasSize[0], currFile.canvasSize[1]);
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currFile.VFXLayer.context.clearRect(0, 0, currFile.canvasSize[0], currFile.canvasSize[1]);
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Util.pasteData(underlyingImageData, pasteData, currFile.currentLayer.context);
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currFile.currentLayer.updateLayerPreview();
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currFile.VFXLayer.canvas.style.zIndex = MIN_Z_INDEX;
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}
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cursorInSelectedArea(mousePos) {
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let floored = [Math.floor(mousePos[0] / currFile.zoom) - this.moveOffset[0],
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Math.floor(mousePos[1] / currFile.zoom) - this.moveOffset[1]];
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if (this.currSelection[floored] != undefined)
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return true;
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return false;
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}
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visit(pixel, visited, data) {
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let toVisit = [pixel];
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let selected = [];
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let currVisited = {};
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currFile.TMPLayer.context.clearRect(0, 0, 512, 512);
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while (toVisit.length > 0) {
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pixel = toVisit.pop();
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selected.push(pixel);
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visited[pixel] = true;
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currVisited[pixel] = true;
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let col = Util.getPixelColor(data, pixel[0], pixel[1], currFile.canvasSize[0]);
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if (col[3] == 255)
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continue;
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if (this.isBorderOfBox(pixel))
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return [];
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let top, bottom, left, right;
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if (pixel[1] > 0)
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top = [pixel[0], pixel[1] - 1];
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else
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top = undefined;
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if (pixel[0] > 0)
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left = [pixel[0] - 1, pixel[1]];
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else
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left = undefined;
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if (pixel[1] < currFile.canvasSize[1])
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bottom = [pixel[0], pixel[1] + 1];
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else
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bottom = undefined;
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if (pixel[0] < currFile.canvasSize[0])
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right = [pixel[0] + 1, pixel[1]];
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else
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right = undefined;
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if (right != undefined && currVisited[right] == undefined)
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toVisit.push(right);
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if (left != undefined && currVisited[left] == undefined)
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toVisit.push(left);
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if (top != undefined && currVisited[top] == undefined)
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toVisit.push(top);
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if (bottom != undefined && currVisited[bottom] == undefined)
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toVisit.push(bottom);
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}
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return selected;
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}
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getSelection() {
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let selected = [];
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let visited = {};
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let data = currFile.VFXLayer.context.getImageData(0, 0, currFile.canvasSize[0], currFile.canvasSize[1]).data;
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// BFS: a pixel that causes the algorithm to visit a pixel of the bounding box is outside the
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// selection. Otherwise, since the algorithm stops visiting when it reaches the outline,
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// the pixel is inside the selection (and so are all the ones that have been visited)
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for (let x=this.boundingBox.minX-1; x<=this.boundingBox.maxX+1; x++) {
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for (let y=this.boundingBox.minY-1; y<=this.boundingBox.maxY+1; y++) {
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if (visited[[x, y]] == undefined) {
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let insidePixels = this.visit([x,y], visited, data);
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for (let i=0; i<insidePixels.length; i++) {
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selected.push(insidePixels[i]);
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this.currSelection[insidePixels[i]] = true;
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}
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}
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}
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}
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// Save the selection outline
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this.outlineData = currFile.VFXLayer.context.getImageData(this.boundingBox.minX,
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this.boundingBox.minY, this.boundingBox.maxX - this.boundingBox.minX,
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this.boundingBox.maxY - this.boundingBox.minY);
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// Create the image data containing the selected pixels
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this.previewData = new ImageData(currFile.canvasSize[0], currFile.canvasSize[1]);
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// Cut the selection
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this.cutSelection();
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// Put it on the TMP layer
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currFile.TMPLayer.context.putImageData(this.previewData, 0, 0);
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// Draw the selected area and the bounding box
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this.drawSelectedArea();
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this.drawBoundingBox();
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return this.previewData;
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}
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drawSelectedArea() {
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for (const key in this.currSelection) {
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let x = parseInt(key.split(",")[0]);
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let y = parseInt(key.split(",")[1]);
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currFile.VFXLayer.context.fillStyle = "rgba(10, 0, 40, 0.3)";
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currFile.VFXLayer.context.fillRect(x + this.moveOffset[0], y + this.moveOffset[1], 1, 1);
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}
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}
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drawOutline() {
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currFile.VFXLayer.context.clearRect(0, 0, currFile.canvasSize[0], currFile.canvasSize[1]);
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currFile.VFXLayer.context.putImageData(this.outlineData, this.boundingBox.minX + this.moveOffset[0],
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this.boundingBox.minY + this.moveOffset[1]);
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}
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drawBoundingBox() {
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currFile.VFXLayer.context.fillStyle = "red";
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currFile.VFXLayer.context.fillRect(this.boundingBox.minX + this.moveOffset[0],
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this.boundingBox.minY + this.moveOffset[1], 1, 1);
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currFile.VFXLayer.context.fillRect(this.boundingBox.minX+ this.moveOffset[0],
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this.boundingBox.maxY + this.moveOffset[1], 1, 1);
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currFile.VFXLayer.context.fillRect(this.boundingBox.maxX+ this.moveOffset[0],
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this.boundingBox.minY + this.moveOffset[1], 1, 1);
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currFile.VFXLayer.context.fillRect(this.boundingBox.maxX+ this.moveOffset[0],
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this.boundingBox.maxY + this.moveOffset[1], 1, 1);
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}
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isBorderOfBox(pixel) {
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return pixel[0] == this.boundingBox.minX || pixel[0] == this.boundingBox.maxX ||
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pixel[1] == this.boundingBox.minY || pixel[1] == this.boundingBox.maxY;
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}
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updateBoundingBox(mouseX, mouseY) {
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if (mouseX > this.boundingBox.maxX)
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this.boundingBox.maxX = Math.floor(mouseX);
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if (mouseX < this.boundingBox.minX)
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this.boundingBox.minX = Math.floor(mouseX);
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if (mouseY < this.boundingBox.minY)
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this.boundingBox.minY = Math.floor(mouseY);
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if (mouseY > this.boundingBox.maxY)
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this.boundingBox.maxY = Math.floor(mouseY);
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}
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} |