667 lines
17 KiB
JavaScript
667 lines
17 KiB
JavaScript
import FillStylePattern from './FillStylePattern';
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import FillStyleLinearGradient from './FillStyleLinearGradient';
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import FillStyleRadialGradient from './FillStyleRadialGradient';
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import GImage from '../env/image.js';
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import {
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ArrayBufferToBase64,
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Base64ToUint8ClampedArray
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} from '../env/tool.js';
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export default class CanvasRenderingContext2D {
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_drawCommands = '';
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_globalAlpha = 1.0;
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_fillStyle = 'rgb(0,0,0)';
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_strokeStyle = 'rgb(0,0,0)';
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_lineWidth = 1;
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_lineCap = 'butt';
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_lineJoin = 'miter';
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_miterLimit = 10;
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_globalCompositeOperation = 'source-over';
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_textAlign = 'start';
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_textBaseline = 'alphabetic';
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_font = '10px sans-serif';
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_savedGlobalAlpha = [];
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timer = null;
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componentId = null;
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_notCommitDrawImageCache = [];
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_needRedrawImageCache = [];
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_redrawCommands = '';
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_autoSaveContext = true;
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// _imageMap = new GHashMap();
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// _textureMap = new GHashMap();
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constructor() {
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this.className = 'CanvasRenderingContext2D';
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//this.save()
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}
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setFillStyle(value) {
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this.fillStyle = value;
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}
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set fillStyle(value) {
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this._fillStyle = value;
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if (typeof(value) == 'string') {
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this._drawCommands = this._drawCommands.concat("F" + value + ";");
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} else if (value instanceof FillStylePattern) {
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const image = value._img;
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if (!image.complete) {
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image.onload = () => {
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var index = this._needRedrawImageCache.indexOf(image);
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if (index > -1) {
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this._needRedrawImageCache.splice(index, 1);
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CanvasRenderingContext2D.GBridge.bindImageTexture(this.componentId, image.src, image._id);
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this._redrawflush(true);
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}
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}
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this._notCommitDrawImageCache.push(image);
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} else {
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CanvasRenderingContext2D.GBridge.bindImageTexture(this.componentId, image.src, image._id);
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}
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//CanvasRenderingContext2D.GBridge.bindImageTexture(this.componentId, image.src, image._id);
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this._drawCommands = this._drawCommands.concat("G" + image._id + "," + value._style + ";");
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} else if (value instanceof FillStyleLinearGradient) {
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var command = "D" + value._start_pos._x.toFixed(2) + "," + value._start_pos._y.toFixed(2) + "," +
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value._end_pos._x.toFixed(2) + "," + value._end_pos._y.toFixed(2) + "," +
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value._stop_count;
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for (var i = 0; i < value._stop_count; ++i) {
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command += ("," + value._stops[i]._pos + "," + value._stops[i]._color);
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}
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this._drawCommands = this._drawCommands.concat(command + ";");
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} else if (value instanceof FillStyleRadialGradient) {
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var command = "H" + value._start_pos._x.toFixed(2) + "," + value._start_pos._y.toFixed(2) + "," + value._start_pos._r
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.toFixed(2) + "," +
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value._end_pos._x.toFixed(2) + "," + value._end_pos._y.toFixed(2) + "," + value._end_pos._r.toFixed(2) + "," +
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value._stop_count;
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for (var i = 0; i < value._stop_count; ++i) {
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command += ("," + value._stops[i]._pos + "," + value._stops[i]._color);
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}
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this._drawCommands = this._drawCommands.concat(command + ";");
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}
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}
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get fillStyle() {
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return this._fillStyle;
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}
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get globalAlpha() {
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return this._globalAlpha;
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}
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setGlobalAlpha(value) {
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this.globalAlpha = value;
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}
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set globalAlpha(value) {
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this._globalAlpha = value;
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this._drawCommands = this._drawCommands.concat("a" + value.toFixed(2) + ";");
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}
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get strokeStyle() {
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return this._strokeStyle;
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}
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setStrokeStyle(value) {
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this.strokeStyle = value;
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}
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set strokeStyle(value) {
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this._strokeStyle = value;
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if (typeof(value) == 'string') {
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this._drawCommands = this._drawCommands.concat("S" + value + ";");
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} else if (value instanceof FillStylePattern) {
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CanvasRenderingContext2D.GBridge.bindImageTexture(this.componentId, image.src, image._id);
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this._drawCommands = this._drawCommands.concat("G" + image._id + "," + value._style + ";");
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} else if (value instanceof FillStyleLinearGradient) {
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var command = "D" + value._start_pos._x.toFixed(2) + "," + value._start_pos._y.toFixed(2) + "," +
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value._end_pos._x.toFixed(2) + "," + value._end_pos._y.toFixed(2) + "," +
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value._stop_count;
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for (var i = 0; i < value._stop_count; ++i) {
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command += ("," + value._stops[i]._pos + "," + value._stops[i]._color);
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}
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this._drawCommands = this._drawCommands.concat(command + ";");
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} else if (value instanceof FillStyleRadialGradient) {
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var command = "H" + value._start_pos._x.toFixed(2) + "," + value._start_pos._y.toFixed(2) + "," + value._start_pos._r
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.toFixed(2) + "," +
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value._end_pos._x.toFixed(2) + "," + value._end_pos._y + ",".toFixed(2) + value._end_pos._r.toFixed(2) + "," +
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value._stop_count;
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for (var i = 0; i < value._stop_count; ++i) {
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command += ("," + value._stops[i]._pos + "," + value._stops[i]._color);
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}
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this._drawCommands = this._drawCommands.concat(command + ";");
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}
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}
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get lineWidth() {
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return this._lineWidth;
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}
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setLineWidth(value) {
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this.lineWidth = value;
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}
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set lineWidth(value) {
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this._lineWidth = value;
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this._drawCommands = this._drawCommands.concat("W" + value + ";");
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}
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get lineCap() {
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return this._lineCap;
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}
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setLineCap(value) {
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this.lineCap = value;
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}
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set lineCap(value) {
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this._lineCap = value;
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this._drawCommands = this._drawCommands.concat("C" + value + ";");
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}
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get lineJoin() {
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return this._lineJoin;
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}
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setLineJoin(value) {
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this.lineJoin = value
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}
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set lineJoin(value) {
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this._lineJoin = value;
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this._drawCommands = this._drawCommands.concat("J" + value + ";");
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}
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get miterLimit() {
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return this._miterLimit;
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}
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setMiterLimit(value) {
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this.miterLimit = value
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}
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set miterLimit(value) {
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this._miterLimit = value;
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this._drawCommands = this._drawCommands.concat("M" + value + ";");
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}
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get globalCompositeOperation() {
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return this._globalCompositeOperation;
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}
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set globalCompositeOperation(value) {
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this._globalCompositeOperation = value;
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let mode = 0;
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switch (value) {
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case "source-over":
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mode = 0;
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break;
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case "source-atop":
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mode = 5;
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break;
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case "source-in":
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mode = 0;
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break;
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case "source-out":
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mode = 2;
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break;
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case "destination-over":
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mode = 4;
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break;
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case "destination-atop":
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mode = 4;
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break;
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case "destination-in":
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mode = 4;
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break;
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case "destination-out":
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mode = 3;
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break;
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case "lighter":
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mode = 1;
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break;
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case "copy":
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mode = 2;
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break;
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case "xor":
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mode = 6;
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break;
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default:
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mode = 0;
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}
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this._drawCommands = this._drawCommands.concat("B" + mode + ";");
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}
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get textAlign() {
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return this._textAlign;
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}
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setTextAlign(value) {
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this.textAlign = value
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}
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set textAlign(value) {
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this._textAlign = value;
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let Align = 0;
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switch (value) {
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case "start":
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Align = 0;
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break;
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case "end":
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Align = 1;
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break;
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case "left":
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Align = 2;
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break;
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case "center":
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Align = 3;
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break;
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case "right":
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Align = 4;
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break;
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default:
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Align = 0;
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}
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this._drawCommands = this._drawCommands.concat("A" + Align + ";");
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}
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get textBaseline() {
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return this._textBaseline;
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}
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setTextBaseline(value) {
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this.textBaseline = value
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}
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set textBaseline(value) {
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this._textBaseline = value;
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let baseline = 0;
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switch (value) {
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case "alphabetic":
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baseline = 0;
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break;
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case "middle":
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baseline = 1;
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break;
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case "top":
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baseline = 2;
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break;
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case "hanging":
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baseline = 3;
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break;
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case "bottom":
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baseline = 4;
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break;
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case "ideographic":
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baseline = 5;
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break;
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default:
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baseline = 0;
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break;
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}
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this._drawCommands = this._drawCommands.concat("E" + baseline + ";");
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}
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get font() {
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return this._font;
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}
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setFontSize(size) {
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var str = this._font;
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var strs = str.trim().split(/\s+/);
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for (var i = 0; i < strs.length; i++) {
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var values = ["normal", "italic", "oblique", "normal", "small-caps", "normal", "bold",
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"bolder", "lighter", "100", "200", "300", "400", "500", "600", "700", "800", "900",
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"normal", "ultra-condensed", "extra-condensed", "condensed", "semi-condensed",
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"semi-expanded", "expanded", "extra-expanded", "ultra-expanded"
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];
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if (-1 == values.indexOf(strs[i].trim())) {
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if (typeof size === 'string') {
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strs[i] = size;
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} else if (typeof size === 'number') {
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strs[i] = String(size) + 'px';
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}
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break;
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}
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}
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this.font = strs.join(" ");
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}
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set font(value) {
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this._font = value;
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this._drawCommands = this._drawCommands.concat("j" + value + ";");
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}
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setTransform(a, b, c, d, tx, ty) {
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this._drawCommands = this._drawCommands.concat("t" +
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(a === 1 ? "1" : a.toFixed(2)) + "," +
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(b === 0 ? "0" : b.toFixed(2)) + "," +
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(c === 0 ? "0" : c.toFixed(2)) + "," +
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(d === 1 ? "1" : d.toFixed(2)) + "," + tx.toFixed(2) + "," + ty.toFixed(2) + ";");
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}
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transform(a, b, c, d, tx, ty) {
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this._drawCommands = this._drawCommands.concat("f" +
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(a === 1 ? "1" : a.toFixed(2)) + "," +
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(b === 0 ? "0" : b.toFixed(2)) + "," +
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(c === 0 ? "0" : c.toFixed(2)) + "," +
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(d === 1 ? "1" : d.toFixed(2)) + "," + tx + "," + ty + ";");
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}
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resetTransform() {
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this._drawCommands = this._drawCommands.concat("m;");
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}
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scale(a, d) {
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this._drawCommands = this._drawCommands.concat("k" + a.toFixed(2) + "," +
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d.toFixed(2) + ";");
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}
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rotate(angle) {
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this._drawCommands = this._drawCommands
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.concat("r" + angle.toFixed(6) + ";");
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}
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translate(tx, ty) {
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this._drawCommands = this._drawCommands.concat("l" + tx.toFixed(2) + "," + ty.toFixed(2) + ";");
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}
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save() {
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this._savedGlobalAlpha.push(this._globalAlpha);
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this._drawCommands = this._drawCommands.concat("v;");
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}
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restore() {
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this._drawCommands = this._drawCommands.concat("e;");
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this._globalAlpha = this._savedGlobalAlpha.pop();
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}
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createPattern(img, pattern) {
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if (typeof img === 'string') {
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var imgObj = new GImage();
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imgObj.src = img;
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img = imgObj;
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}
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return new FillStylePattern(img, pattern);
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}
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createLinearGradient(x0, y0, x1, y1) {
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return new FillStyleLinearGradient(x0, y0, x1, y1);
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}
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createRadialGradient = function(x0, y0, r0, x1, y1, r1) {
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return new FillStyleRadialGradient(x0, y0, r0, x1, y1, r1);
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};
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createCircularGradient = function(x0, y0, r0) {
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return new FillStyleRadialGradient(x0, y0, 0, x0, y0, r0);
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};
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strokeRect(x, y, w, h) {
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this._drawCommands = this._drawCommands.concat("s" + x + "," + y + "," + w + "," + h + ";");
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}
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clearRect(x, y, w, h) {
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this._drawCommands = this._drawCommands.concat("c" + x + "," + y + "," + w +
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"," + h + ";");
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}
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clip() {
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this._drawCommands = this._drawCommands.concat("p;");
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}
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resetClip() {
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this._drawCommands = this._drawCommands.concat("q;");
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}
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closePath() {
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this._drawCommands = this._drawCommands.concat("o;");
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}
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moveTo(x, y) {
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this._drawCommands = this._drawCommands.concat("g" + x.toFixed(2) + "," + y.toFixed(2) + ";");
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}
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lineTo(x, y) {
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this._drawCommands = this._drawCommands.concat("i" + x.toFixed(2) + "," + y.toFixed(2) + ";");
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}
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quadraticCurveTo = function(cpx, cpy, x, y) {
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this._drawCommands = this._drawCommands.concat("u" + cpx + "," + cpy + "," + x + "," + y + ";");
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}
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bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y, ) {
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this._drawCommands = this._drawCommands.concat(
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"z" + cp1x.toFixed(2) + "," + cp1y.toFixed(2) + "," + cp2x.toFixed(2) + "," + cp2y.toFixed(2) + "," +
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x.toFixed(2) + "," + y.toFixed(2) + ";");
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}
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arcTo(x1, y1, x2, y2, radius) {
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this._drawCommands = this._drawCommands.concat("h" + x1 + "," + y1 + "," + x2 + "," + y2 + "," + radius + ";");
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}
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beginPath() {
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this._drawCommands = this._drawCommands.concat("b;");
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}
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fillRect(x, y, w, h) {
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this._drawCommands = this._drawCommands.concat("n" + x + "," + y + "," + w +
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"," + h + ";");
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}
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rect(x, y, w, h) {
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this._drawCommands = this._drawCommands.concat("w" + x + "," + y + "," + w + "," + h + ";");
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}
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fill() {
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this._drawCommands = this._drawCommands.concat("L;");
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}
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stroke(path) {
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this._drawCommands = this._drawCommands.concat("x;");
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}
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arc(x, y, radius, startAngle, endAngle, anticlockwise) {
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let ianticlockwise = 0;
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if (anticlockwise) {
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ianticlockwise = 1;
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}
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this._drawCommands = this._drawCommands.concat(
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"y" + x.toFixed(2) + "," + y.toFixed(2) + "," +
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radius.toFixed(2) + "," + startAngle + "," + endAngle + "," + ianticlockwise +
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";"
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);
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}
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fillText(text, x, y) {
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let tmptext = text.replace(/!/g, "!!");
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tmptext = tmptext.replace(/,/g, "!,");
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tmptext = tmptext.replace(/;/g, "!;");
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this._drawCommands = this._drawCommands.concat("T" + tmptext + "," + x + "," + y + ",0.0;");
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}
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strokeText = function(text, x, y) {
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let tmptext = text.replace(/!/g, "!!");
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tmptext = tmptext.replace(/,/g, "!,");
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tmptext = tmptext.replace(/;/g, "!;");
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this._drawCommands = this._drawCommands.concat("U" + tmptext + "," + x + "," + y + ",0.0;");
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}
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measureText(text) {
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return CanvasRenderingContext2D.GBridge.measureText(text, this.font, this.componentId);
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}
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isPointInPath = function(x, y) {
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throw new Error('GCanvas not supported yet');
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}
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drawImage(image, sx, sy, sw, sh, dx, dy, dw, dh) {
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if (typeof image === 'string') {
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var imgObj = new GImage();
|
|
imgObj.src = image;
|
|
image = imgObj;
|
|
}
|
|
if (image instanceof GImage) {
|
|
if (!image.complete) {
|
|
imgObj.onload = () => {
|
|
var index = this._needRedrawImageCache.indexOf(image);
|
|
if (index > -1) {
|
|
this._needRedrawImageCache.splice(index, 1);
|
|
CanvasRenderingContext2D.GBridge.bindImageTexture(this.componentId, image.src, image._id);
|
|
this._redrawflush(true);
|
|
}
|
|
}
|
|
this._notCommitDrawImageCache.push(image);
|
|
} else {
|
|
CanvasRenderingContext2D.GBridge.bindImageTexture(this.componentId, image.src, image._id);
|
|
}
|
|
var srcArgs = [image, sx, sy, sw, sh, dx, dy, dw, dh];
|
|
var args = [];
|
|
for (var arg in srcArgs) {
|
|
if (typeof(srcArgs[arg]) != 'undefined') {
|
|
args.push(srcArgs[arg]);
|
|
}
|
|
}
|
|
this.__drawImage.apply(this, args);
|
|
//this.__drawImage(image,sx, sy, sw, sh, dx, dy, dw, dh);
|
|
}
|
|
}
|
|
|
|
__drawImage(image, sx, sy, sw, sh, dx, dy, dw, dh) {
|
|
const numArgs = arguments.length;
|
|
|
|
function drawImageCommands() {
|
|
|
|
if (numArgs === 3) {
|
|
const x = parseFloat(sx) || 0.0;
|
|
const y = parseFloat(sy) || 0.0;
|
|
|
|
return ("d" + image._id + ",0,0," +
|
|
image.width + "," + image.height + "," +
|
|
x + "," + y + "," + image.width + "," + image.height + ";");
|
|
} else if (numArgs === 5) {
|
|
const x = parseFloat(sx) || 0.0;
|
|
const y = parseFloat(sy) || 0.0;
|
|
const width = parseInt(sw) || image.width;
|
|
const height = parseInt(sh) || image.height;
|
|
|
|
return ("d" + image._id + ",0,0," +
|
|
image.width + "," + image.height + "," +
|
|
x + "," + y + "," + width + "," + height + ";");
|
|
} else if (numArgs === 9) {
|
|
sx = parseFloat(sx) || 0.0;
|
|
sy = parseFloat(sy) || 0.0;
|
|
sw = parseInt(sw) || image.width;
|
|
sh = parseInt(sh) || image.height;
|
|
dx = parseFloat(dx) || 0.0;
|
|
dy = parseFloat(dy) || 0.0;
|
|
dw = parseInt(dw) || image.width;
|
|
dh = parseInt(dh) || image.height;
|
|
|
|
return ("d" + image._id + "," +
|
|
sx + "," + sy + "," + sw + "," + sh + "," +
|
|
dx + "," + dy + "," + dw + "," + dh + ";");
|
|
}
|
|
}
|
|
this._drawCommands += drawImageCommands();
|
|
}
|
|
|
|
_flush(reserve, callback) {
|
|
const commands = this._drawCommands;
|
|
this._drawCommands = '';
|
|
CanvasRenderingContext2D.GBridge.render2d(this.componentId, commands, callback);
|
|
this._needRender = false;
|
|
}
|
|
|
|
_redrawflush(reserve, callback) {
|
|
const commands = this._redrawCommands;
|
|
CanvasRenderingContext2D.GBridge.render2d(this.componentId, commands, callback);
|
|
if (this._needRedrawImageCache.length == 0) {
|
|
this._redrawCommands = '';
|
|
}
|
|
}
|
|
|
|
draw(reserve, callback) {
|
|
if (!reserve) {
|
|
this._globalAlpha = this._savedGlobalAlpha.pop();
|
|
this._savedGlobalAlpha.push(this._globalAlpha);
|
|
this._redrawCommands = this._drawCommands;
|
|
this._needRedrawImageCache = this._notCommitDrawImageCache;
|
|
if (this._autoSaveContext) {
|
|
this._drawCommands = ("v;" + this._drawCommands);
|
|
this._autoSaveContext = false;
|
|
} else {
|
|
this._drawCommands = ("e;X;v;" + this._drawCommands);
|
|
}
|
|
} else {
|
|
this._needRedrawImageCache = this._needRedrawImageCache.concat(this._notCommitDrawImageCache);
|
|
this._redrawCommands += this._drawCommands;
|
|
if (this._autoSaveContext) {
|
|
this._drawCommands = ("v;" + this._drawCommands);
|
|
this._autoSaveContext = false;
|
|
}
|
|
}
|
|
this._notCommitDrawImageCache = [];
|
|
if (this._flush) {
|
|
this._flush(reserve, callback);
|
|
}
|
|
}
|
|
|
|
getImageData(x, y, w, h, callback) {
|
|
CanvasRenderingContext2D.GBridge.getImageData(this.componentId, x, y, w, h, function(res) {
|
|
res.data = Base64ToUint8ClampedArray(res.data);
|
|
if (typeof(callback) == 'function') {
|
|
callback(res);
|
|
}
|
|
});
|
|
}
|
|
|
|
putImageData(data, x, y, w, h, callback) {
|
|
if (data instanceof Uint8ClampedArray) {
|
|
data = ArrayBufferToBase64(data);
|
|
CanvasRenderingContext2D.GBridge.putImageData(this.componentId, data, x, y, w, h, function(res) {
|
|
if (typeof(callback) == 'function') {
|
|
callback(res);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
toTempFilePath(x, y, width, height, destWidth, destHeight, fileType, quality, callback) {
|
|
CanvasRenderingContext2D.GBridge.toTempFilePath(this.componentId, x, y, width, height, destWidth, destHeight,
|
|
fileType, quality,
|
|
function(res) {
|
|
if (typeof(callback) == 'function') {
|
|
callback(res);
|
|
}
|
|
});
|
|
}
|
|
}
|