oil-station/pos-uni/uni_modules/Sansnn-uQRCode/js_sdk/gcanvas/context-2d/RenderingContext.js
2024-08-16 18:26:19 +08:00

667 lines
17 KiB
JavaScript

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);
}
});
}
}