@scandit/web-datacapture-core
Version:
Scandit Data Capture SDK for the Web
56 lines (53 loc) • 2.46 kB
TypeScript
/// <reference types="emscripten" />
import { bl as FrameReaderAbstract, bm as ColorType, bn as PoolCapacityOptions, bo as FrameCapture } from '../../Camera-BoUtNCzS.js';
import { WatermarkStack } from './WatermarkStack.js';
import { Optional } from '../../tsHelper.js';
import '../Serializable.js';
import '../../Common.js';
import '../../ScanditIcon.js';
import '../utils/ScanditHTMLElement.js';
import '../../DataCaptureContextSettings.js';
import '../../DataCaptureViewPlusRelated.js';
import '../../NotificationPresenter/NotificationPresenter.js';
import '../../NotificationPresenter/NotificationConfiguration.js';
import '../../NotificationPresenter/NotificationStyle.js';
import '../../ViewControls.js';
import '../CustomLocationsView.js';
import '../View.js';
import '../AnchorPositions.js';
import '../nativeHandle.js';
import '../../license/OpenSourceSoftwareLicenseInfo.js';
import '../HtmlElementState.js';
import '../../worker/OverrideState.js';
import '../../logger.js';
import '../../LoadingStatus.js';
declare class GrayScaleFrameReader extends FrameReaderAbstract {
colorType: ColorType;
protected _framePool: Optional<WatermarkStack<Uint8ClampedArray>>;
private _shaderProgram;
private _canvas;
private _ctx;
private _positionBuffer;
private _texture;
private _frameSize;
/**
* When these vertices are connected, they form a full-screen quad that covers the entire viewport.
* This quad is used as the rendering target for the grayscale effect.
* The vertices are specified in normalized device coordinates, where (-1, -1) is the bottom-left corner of the viewport, and (1, 1) is the top-right corner.
* These positions are used in conjunction with the vertex and fragment shaders to apply the grayscale effect to the input RGBA frame across the entire screen.
* The transformation is performed on each pixel within these triangles using the shaders.
* https://www.khronos.org/opengl/wiki/Primitive#Triangle_primitives
*/
private _positions;
constructor(originalGLContext: WebGLRenderingContext, options?: PoolCapacityOptions | undefined);
private get _webglContext();
readFromSource(source: TexImageSource): FrameCapture;
setup(): void;
dispose(): void;
private updateCanvasSizeIfNeeded;
private updateFrameSizeIfNeeded;
private initShaderProgram;
private initBuffers;
private initTexture;
}
export { GrayScaleFrameReader };