/** * Assigns a constant rectangle to the input Gray8Image, replacing values in the image. * * @param image the input image (output replaces input). * @throws Error if the input is not a Gray8Image. */ public void push(Image image) throws Error { if (!(image instanceof Gray8Image)) { throw new Error( Error.PACKAGE.ALGORITHM, ErrorCodes.IMAGE_NOT_GRAY8IMAGE, image.toString(), null, null); } Gray8Image input = (Gray8Image) image; byte[] data = input.getData(); int nLimitY = Math.min(input.getHeight(), this.cY + this.nHeight); int nLimitX = Math.min(input.getWidth(), this.cX + this.nWidth); for (int i = this.cY; i < nLimitY; i++) { int nStart = i * image.getWidth(); for (int j = this.cX; j < nLimitX; j++) { data[nStart + j] = this.bValue; } } super.setOutput(input); }
/** * Accepts a new MaskedGray8Image and initializes all the generator indices. * * @param image The input MaskedGray8Image. * @throws jjil.core.Error if the input is not of type MaskedGray8Image or is smaller than the * subimages to be generated. */ public void push(Image image) throws jjil.core.Error { if (!(image instanceof Gray8MaskedImage)) { throw new Error( Error.PACKAGE.ALGORITHM, ErrorCodes.OBJECT_NOT_EXPECTED_TYPE, image.toString(), "Gray8MaskedImage", null); } if (image.getWidth() < this.nWidth || image.getHeight() < this.nHeight) { throw new Error( Error.PACKAGE.ALGORITHM, ErrorCodes.IMAGE_TOO_SMALL, image.toString(), new Integer(this.nWidth).toString(), new Integer(this.nHeight).toString()); } this.imageInput = (Gray8MaskedImage) image; // we want to find the largest integer l such that // (l-1) * w + w <= iw // where l = computed limit on index // w = subimage width or height // iw = image width or height // or l = (iw - w) / w + 1 (truncated) // Java division truncates this.nHorizLimit = (image.getWidth() - this.nWidth) / this.nXOffset; this.nVertLimit = (image.getHeight() - this.nHeight) / this.nYOffset; this.nHorizIndex = -1; // first time through increments this.nVertIndex = 0; this.oSubImageReady = false; }