96 lines
3.5 KiB
JavaScript
96 lines
3.5 KiB
JavaScript
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/**
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* @experimental
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*/
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var CanvasRenderingTarget2D = /** @class */ (function () {
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function CanvasRenderingTarget2D(context, mediaSize, bitmapSize) {
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if (mediaSize.width === 0 || mediaSize.height === 0) {
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throw new TypeError('Rendering target could only be created on a media with positive width and height');
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}
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this._mediaSize = mediaSize;
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// !Number.isInteger(bitmapSize.width) || !Number.isInteger(bitmapSize.height)
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if (bitmapSize.width === 0 || bitmapSize.height === 0) {
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throw new TypeError('Rendering target could only be created using a bitmap with positive integer width and height');
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}
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this._bitmapSize = bitmapSize;
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this._context = context;
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}
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CanvasRenderingTarget2D.prototype.useMediaCoordinateSpace = function (f) {
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try {
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this._context.save();
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// do not use resetTransform to support old versions of Edge
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this._context.setTransform(1, 0, 0, 1, 0, 0);
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this._context.scale(this._horizontalPixelRatio, this._verticalPixelRatio);
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return f({
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context: this._context,
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mediaSize: this._mediaSize,
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});
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}
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finally {
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this._context.restore();
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}
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};
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CanvasRenderingTarget2D.prototype.useBitmapCoordinateSpace = function (f) {
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try {
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this._context.save();
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// do not use resetTransform to support old versions of Edge
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this._context.setTransform(1, 0, 0, 1, 0, 0);
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return f({
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context: this._context,
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mediaSize: this._mediaSize,
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bitmapSize: this._bitmapSize,
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horizontalPixelRatio: this._horizontalPixelRatio,
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verticalPixelRatio: this._verticalPixelRatio,
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});
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}
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finally {
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this._context.restore();
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}
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};
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Object.defineProperty(CanvasRenderingTarget2D.prototype, "_horizontalPixelRatio", {
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get: function () {
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return this._bitmapSize.width / this._mediaSize.width;
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},
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enumerable: false,
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configurable: true
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});
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Object.defineProperty(CanvasRenderingTarget2D.prototype, "_verticalPixelRatio", {
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get: function () {
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return this._bitmapSize.height / this._mediaSize.height;
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},
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enumerable: false,
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configurable: true
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});
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return CanvasRenderingTarget2D;
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}());
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export { CanvasRenderingTarget2D };
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/**
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* @experimental
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*/
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export function createCanvasRenderingTarget2D(binding, contextOptions) {
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var mediaSize = binding.canvasElementClientSize;
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var bitmapSize = binding.bitmapSize;
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var context = binding.canvasElement.getContext('2d', contextOptions);
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if (context === null) {
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throw new Error('Could not get 2d drawing context from bound canvas element. Has the canvas already been set to a different context mode?');
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}
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return new CanvasRenderingTarget2D(context, mediaSize, bitmapSize);
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}
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/**
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* @experimental
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*/
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export function tryCreateCanvasRenderingTarget2D(binding, contextOptions) {
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var mediaSize = binding.canvasElementClientSize;
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if (mediaSize.width === 0 || mediaSize.height === 0) {
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return null;
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}
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var bitmapSize = binding.bitmapSize;
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if (bitmapSize.width === 0 || bitmapSize.height === 0) {
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return null;
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}
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var context = binding.canvasElement.getContext('2d', contextOptions);
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if (context === null) {
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return null;
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}
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return new CanvasRenderingTarget2D(context, mediaSize, bitmapSize);
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}
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