| 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 Scaling category of |
| 28 | * the macros used by the generic scaleloop function. |
| 29 | * |
| 30 | * This implementation performs no input resampling whatsoever and |
| 31 | * is only valid if the input data is delivered at the exact same |
| 32 | * resolution as the output data is being generated. At the same |
| 33 | * time, this implementation of the Scaling macros is the most optimal |
| 34 | * such implementation. |
| 35 | */ |
| 36 | |
| 37 | #define DeclareScaleVars \ |
| 38 | int dstX, dstY, dstX2, dstY2; |
| 39 | |
| 40 | #define SRCX dstX |
| 41 | #define SRCY dstY |
| 42 | #define DSTX dstX |
| 43 | #define DSTY dstY |
| 44 | #define DSTX1 srcOX |
| 45 | #define DSTY1 srcOY |
| 46 | #define DSTX2 dstX2 |
| 47 | #define DSTY2 dstY2 |
| 48 | |
| 49 | #define InitScale(pixels, srcOff, srcScan, \ |
| 50 | srcOX, srcOY, srcW, srcH, \ |
| 51 | srcTW, srcTH, dstTW, dstTH) \ |
| 52 | do { \ |
| 53 | dstX2 = srcOX + srcW; \ |
| 54 | dstY2 = srcOY + srcH; \ |
| 55 | SetInputRow(pixels, srcOff, srcScan, srcOY, srcOY); \ |
| 56 | } while (0) |
| 57 | |
| 58 | #define RowLoop(srcOY) \ |
| 59 | for (dstY = srcOY; dstY < dstY2; dstY++) |
| 60 | |
| 61 | #define RowSetup(srcTH, dstTH, srcTW, dstTW, \ |
| 62 | srcOY, pixels, srcOff, srcScan) \ |
| 63 | do {} while (0) |
| 64 | |
| 65 | #define ColLoop(srcOX) \ |
| 66 | for (dstX = srcOX; dstX < dstX2; dstX++) |
| 67 | |
| 68 | #define ColSetup(srcTW, dstTW, pixel) \ |
| 69 | pixel = GetPixelInc() |
| 70 | |
| 71 | #define RowEnd(srcTH, dstTH, srcW, srcScan) \ |
| 72 | InputPixelInc(srcScan - srcW) |