2362N/A * Copyright (c) 1996, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 0N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 0N/A * This file contains macro definitions for the Encoding category of 0N/A * the macros used by the generic scaleloop function. 0N/A * This implementation uses a Floyd-Steinberg error diffusion technique 0N/A * to produce a very high quality version of an image with only an 8-bit 0N/A * (or less) RGB colormap. The error diffusion technique requires that 0N/A * the input color information be delivered in a special order from the 0N/A * top row to the bottom row and then left to right within each row, thus 0N/A * it is only valid in cases where the ImageProducer has specified the 0N/A * TopDownLeftRight delivery hint. If the data is not read in that order, 0N/A * no mathematical or memory access errors should occur, but the dithering 0N/A * error will be spread through the pixels of the output image in an 0N/A * unpleasant manner. 0N/A * These definitions vector the standard macro names to the "Color" 0N/A * versions of those macros only if the "DitherDeclared" keyword has 0N/A * not yet been defined elsewhere. The "DitherDeclared" keyword is 0N/A * also defined here to claim ownership of the primary implementation 0N/A * even though this file does not rely on the definitions in any other 0N/A /* add previous errors */ \
0N/A /* bounds checking */ \
0N/A /* Store the closest color in the destination pixel */ \
0N/A /* Set the error from the previous lap */ \
0N/A /* compute the errors */ \
0N/A /* distribute the errors */ \