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 the 31 * output pixels directly by using shift and scale amounts to 32 * specify which bits of the output pixel should contain the red, 33 * green, and blue components. The scale factors are only needed 34 * if some of the color components in the output pixels hold less 35 * than 8-bits of information. 36 * 37 * This file can be used to provide the default implementation of the 38 * Encoding macros for direct pixel type displays with any size up to 39 * 8-bits of color information per component. 40 */ 41 42 #define DeclareDitherVars \ 43 int red_dither_shift, green_dither_shift, blue_dither_shift; \ 44 int red_dither_scale, green_dither_scale, blue_dither_scale; 45 46 #define InitDither(cvdata, clrdata, dstTW) \ 47 do { \ 48 red_dither_shift = clrdata->rOff; \ 49 green_dither_shift = clrdata->gOff; \ 50 blue_dither_shift = clrdata->bOff; \ 51 red_dither_scale = clrdata->rScale; \ 52 green_dither_scale = clrdata->gScale; \ 53 blue_dither_scale = clrdata->bScale; \ 54 } while (0) 55 56 #define StartDitherLine(cvdata, dstX1, dstY) \ 57 do {} while (0) 58 59 #define DitherPixel(dstX, dstY, pixel, red, green, blue) \ 60 do { \ 61 pixel = (((red >> red_dither_scale) \ 62 << red_dither_shift) | \ 63 ((green >> green_dither_scale) \ 64 << green_dither_shift) | \ 65 ((blue >> blue_dither_scale) \ 66 << blue_dither_shift)); \ 67 } while (0) 68 69 #define DitherBufComplete(cvdata, dstX1) \ 70 do {} while (0) 71