| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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) |