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 Storing category of 28 * the macros used by the generic scaleloop function. 29 * 30 * This implementation can store 8-bit or 16-bit pixels into an array 31 * of bytes or shorts such that the pixel for (srcX, srcY) is stored at 32 * index (srcOff + srcY * srcScan + srcX) in the array. 33 * 34 * This implementation can also store 24-bit pixels into an array of bytes 35 * as three consecutive bytes such that the pixel for (srcX, srcY) is 36 * stored at indices (srcOff + srcY * srcScan + srcX * 3 + C) in the 37 * array, where C == 0 for the blue component, 1 for the green component, 38 * and 2 for the red component. 39 */ 40 41 #define DeclareOutputVars \ 42 pixptr dstP; \ 43 int pixsz; 44 45 #define InitOutput(cvdata, clrdata, dstX, dstY) \ 46 do { \ 47 switch (clrdata->bitsperpixel) { \ 48 case 8: pixsz = 1; break; \ 49 case 16: pixsz = 2; break; \ 50 case 24: pixsz = 3; break; \ 51 default: \ 52 SignalError(0, JAVAPKG "InternalError", \ 53 "unsupported screen depth"); \ 54 return SCALEFAILURE; \ 55 } \ 56 img_check(pixsz != 2 || (ScanBytes(cvdata) & 1) == 0); \ 57 dstP.vp = cvdata->outbuf; \ 58 dstP.bp += dstY * ScanBytes(cvdata) + dstX * pixsz; \ 59 } while (0) 60 61 #define PutPixelInc(pixel, red, green, blue) \ 62 do { \ 63 switch (pixsz) { \ 64 case 1: \ 65 *dstP.bp++ = ((unsigned char) pixel); \ 66 break; \ 67 case 2: \ 68 *dstP.sp++ = ((unsigned short) pixel); \ 69 break; \ 70 case 3: \ 71 *dstP.bp++ = blue; \ 72 *dstP.bp++ = green; \ 73 *dstP.bp++ = red; \ 74 break; \ 75 } \ 76 } while (0) 77 78 #define EndOutputRow(cvdata, dstY, dstX1, dstX2) \ 79 do { \ 80 SendRow(cvdata, dstY, dstX1, dstX2); \ 81 dstP.bp += ScanBytes(cvdata) - (dstX2 - dstX1) * pixsz; \ 82 } while (0) 83 84 #define EndOutputRect(cvdata, dstX1, dstY1, dstX2, dstY2) \ 85 SendBuffer(cvdata, dstX1, dstY1, dstX2, dstY2) 86