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 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) 73