| 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 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) |