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