| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003 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 | |
| 28 | /* |
| 29 | * FUNCTION |
| 30 | * mlib_ImageConvVersion - Get Conv* funtions version |
| 31 | * 0 - "C" version |
| 32 | * 1 - "VIS" version |
| 33 | * 2 - "i386" version |
| 34 | * 3 - "MMX" version |
| 35 | * |
| 36 | * SYNOPSIS |
| 37 | * mlib_s32 mlib_ImageConvVersion(mlib_s32 m, |
| 38 | * mlib_s32 n, |
| 39 | * mlib_s32 scale, |
| 40 | * mlib_type type) |
| 41 | * |
| 42 | */ |
| 43 | |
| 44 | #include "mlib_image.h" |
| 45 | |
| 46 | /***************************************************************/ |
| 47 | #define MAX_U8 8 |
| 48 | #define MAX_S16 32 |
| 49 | |
| 50 | /***************************************************************/ |
| 51 | mlib_s32 mlib_ImageConvVersion(mlib_s32 m, |
| 52 | mlib_s32 n, |
| 53 | mlib_s32 scale, |
| 54 | mlib_type type) |
| 55 | { |
| 56 | mlib_d64 dscale = 1.0 / (1 << scale); /* 16 < scale <= 31 */ |
| 57 | |
| 58 | if (type == MLIB_BYTE) { |
| 59 | if ((m * n * dscale * 32768.0 * 512.0) > MAX_U8) |
| 60 | return 0; |
| 61 | return 1; |
| 62 | } |
| 63 | else if ((type == MLIB_USHORT) || (type == MLIB_SHORT)) { |
| 64 | |
| 65 | if ((m != 2) || (n != 2)) |
| 66 | return 0; |
| 67 | |
| 68 | if ((m * n * dscale * 32768.0 * 32768.0) > MAX_S16) |
| 69 | return 0; |
| 70 | return 1; |
| 71 | } |
| 72 | else |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | /***************************************************************/ |