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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import logger from './logger.mjs';
class CanvasPlus {
constructor(options = {}) {
this.logger = new logger('CanvasPlus');
this.options = options;
this.screenCanvas = null;
this.composeCanvas = null;
this.screenContext = null;
this.composeContext = null;
this.width = options.width || 800;
this.height = options.height || 600;
this.initCanvas(this.width, this.height);
}
initCanvas(width = 800, height = 600) {
this.width = width;
this.height = height;
this.screenCanvas = this.createCanvas(width, height);
this.screenContext = this.screenCanvas.getContext('2d');
this.composeCanvas = this.createCanvas(width, height);
this.composeContext = this.composeCanvas.getContext('2d');
if (this.options.appendTo) {
this.options.appendTo.appendChild(this.screenCanvas);
}
this.logger.log(`Canvas initialized with dimensions ${width}x${height}`);
return this;
}
createCanvas(width, height) {
let canvas = document.createElement('canvas');
canvas.width = width;
canvas.height = height;
return canvas;
}
get2DComposeContext(){
if(this.composeContext===null){
try {
this.composeContext = this.composeCanvas.getContext('2d');
}
catch {
throw new Error("Canvas context is not initialized. Call initCanvas() first.");
}
}
return this.composeContext;
}
get2DScreenContext(){
if(this.screenContext===null){
try {
this.screenContext = this.screenCanvas.getContext('2d');
}
catch {
throw new Error("Canvas context is not initialized. Call initCanvas() first.");
}
}
return this.screenContext;
}
clearScreenCanvas() {
if (this.screenContext) {
this.screenContext.clearRect(0, 0, this.width, this.height);
}
}
clearComposeCanvas(color) {
if (this.composeContext) {
if(color){
this.composeContext.fillStyle = color;
this.composeContext.fillRect(0, 0, this.width, this.height);
return;
} else {
this.composeContext.clearRect(0, 0, this.width, this.height);
}
}
}
clearCanvas(color = null) {
this.clearComposeCanvas(color);
}
renderCanvas() {
this.clearScreenCanvas();
if (this.composeContext && this.screenContext) {
this.screenContext.drawImage(this.composeCanvas, 0, 0, this.width, this.height);
}
}
drawRectangle(x, y, width, height, color = 'black') {
if (this.composeContext) {
this.composeContext.fillStyle = color;
this.composeContext.fillRect(x, y, width, height);
}
}
drawLine(x1, y1, x2, y2, color = 'black', lineWidth = 1) {
if (this.composeContext) {
this.composeContext.strokeStyle = color;
this.composeContext.lineWidth = lineWidth;
this.composeContext.beginPath();
this.composeContext.moveTo(x1, y1);
this.composeContext.lineTo(x2, y2);
this.composeContext.stroke();
}
}
drawCircle(x, y, radius, color = 'black') {
if (this.composeContext) {
this.composeContext.fillStyle = color;
this.composeContext.beginPath();
this.composeContext.arc(x, y, radius, 0, Math.PI * 2);
this.composeContext.fill();
}
}
drawImage(img, x, y, width = null, height = null) {
if (this.composeContext) {
if (width && height) {
this.composeContext.drawImage(img, x, y, width, height);
} else {
this.composeContext.drawImage(img, x, y);
}
}
}
drawText(text, x, y, font = '16px Arial', color = 'black') {
if (this.composeContext) {
this.composeContext.font = font;
this.composeContext.fillStyle = color;
this.composeContext.fillText(text, x, y);
}
}
}
export default CanvasPlus;
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