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 Fetching category of 28 * the macros used by the generic scaleloop function. 29 * 30 * This implementation can load 8-bit pixels from an array of bytes 31 * where the data for pixel (srcX, srcY) is loaded from index 32 * (srcOff + srcY * srcScan + srcX) in the array. 33 */ 34 35#define DeclareInputVars \ 36 pixptr srcP; 37 38#define InitInput(srcBPP) \ 39 img_check(srcBPP == 8) 40 41#define SetInputRow(pixels, srcOff, srcScan, srcY, srcOY) \ 42 srcP.vp = pixels; \ 43 srcP.bp += srcOff + ((srcY-srcOY) * srcScan) 44 45#define GetPixelInc() \ 46 ((int) *srcP.bp++) 47 48#define GetPixel(srcX) \ 49 ((int) srcP.bp[srcX]) 50 51#define InputPixelInc(X) \ 52 srcP.bp += X 53 54#define VerifyPixelRange(pixel, mapsize) \ 55 do { \ 56 img_check(((unsigned int) pixel) <= 255); \ 57 img_check(mapsize >= 256); \ 58 } while (0) 59