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 Fetching category of
28 * the macros used by the generic scaleloop function.
29 *
30 * This implementation can load either 8-bit or 32-bit pixels from an
31 * array of bytes or longs where the data for pixel (srcX, srcY) is
32 * loaded from index (srcOff + srcY * srcScan + srcX) in the array.
33 *
34 * This file can be used to provide the default implementation of the
35 * Fetching macros to handle all input sizes.
36 */
37
38#define DeclareInputVars                                        \
39    pixptr srcP;                                                \
40    int src32;
41
42#define InitInput(srcBPP)                                               \
43    do {                                                                \
44        switch (srcBPP) {                                               \
45        case 8: src32 = 0; break;                                       \
46        case 32: src32 = 1; break;                                      \
47        default:                                                        \
48            SignalError(0, JAVAPKG "InternalError",                     \
49                        "unsupported source depth");                    \
50            return SCALEFAILURE;                                        \
51        }                                                               \
52    } while (0)
53
54#define SetInputRow(pixels, srcOff, srcScan, srcY, srcOY)               \
55    do {                                                                \
56        srcP.vp = pixels;                                               \
57        if (src32) {                                                    \
58            srcP.ip += srcOff + ((srcY-srcOY) * srcScan);               \
59        } else {                                                        \
60            srcP.bp += srcOff + ((srcY-srcOY) * srcScan);               \
61        }                                                               \
62    } while (0)
63
64#define GetPixelInc()                                                   \
65    (src32 ? *srcP.ip++ : ((int) *srcP.bp++))
66
67#define GetPixel(srcX)                                                  \
68    (src32 ? srcP.ip[srcX] : ((int) srcP.bp[srcX]))
69
70#define InputPixelInc(X)                                                \
71    do {                                                                \
72        if (src32) {                                                    \
73            srcP.ip += X;                                               \
74        } else {                                                        \
75            srcP.bp += X;                                               \
76        }                                                               \
77    } while (0)
78
79#define VerifyPixelRange(pixel, mapsize)                                \
80    do {                                                                \
81        if (((unsigned int) pixel) >= mapsize) {                        \
82            SignalError(0, JAVAPKG "ArrayIndexOutOfBoundsException", 0);\
83            return SCALEFAILURE;                                        \
84        }                                                               \
85    } while (0)
86