1 /* 2 * Copyright (c) 1996, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* 27 * This file contains macro definitions for the Encoding category of 28 * the macros used by the generic scaleloop function. 29 * 30 * This implementation can encode the color information into 32-bit 31 * output pixels directly by using shift amounts to specify which 32 * bits of the 32-bit output pixel should contain the red, green, 33 * and blue components. 34 */ 35 36 #define DeclareDitherVars \ 37 int red_dither_shift, green_dither_shift, blue_dither_shift; 38 39 #define InitDither(cvdata, clrdata, dstTW) \ 40 do { \ 41 red_dither_shift = clrdata->rOff; \ 42 green_dither_shift = clrdata->gOff; \ 43 blue_dither_shift = clrdata->bOff; \ 44 } while (0) 45 46 #define StartDitherLine(cvdata, dstX1, dstY) \ 47 do {} while (0) 48 49 #define DitherPixel(dstX, dstY, pixel, red, green, blue) \ 50 do { \ 51 pixel = ((red << red_dither_shift) | \ 52 (green << green_dither_shift) | \ 53 (blue << blue_dither_shift)); \ 54 } while (0) 55 56 #define DitherBufComplete(cvdata, dstX1) \ 57 do {} while (0) 58