tom-weatherhead/thaw-image-processing.ts

// thaw-image-processing.ts/src/flip.ts

// import { IOperationOptions } from './file-types/jpeg';

import {
    createAffineTransformationMatrix,
    doAffineTransformation
} from './affine';

import { createThAWImage, IThAWImage } from '../util/image';

export function flipImage(srcImage: IThAWImage): IThAWImage {
    const dstImage = createThAWImage(
        srcImage.width,
        srcImage.height,
        srcImage.bytesPerPixel
    );
    const flipMatrix = createAffineTransformationMatrix(
        1,
        0,
        0,
        0,
        -1,
        srcImage.height - 1
    );

    doAffineTransformation(dstImage, srcImage, flipMatrix);

    return dstImage;
}