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 24-bit pixels into an array of bytes
31  * as three consecutive bytes such that the pixel for (srcX, srcY) is
32  * stored at indices (srcOff + srcY * srcScan + srcX * 3 + C) in the
33  * array, where C == 0 for the blue component, 1 for the green component,
34  * and 2 for the red component.
35  */
36 
37 #define DeclareOutputVars                               \
38     pixptr dstP;
39 
40 #define InitOutput(cvdata, clrdata, dstX, dstY)                 \
41     do {                                                        \
42         img_check(clrdata->bitsperpixel == 24);                 \
43         dstP.vp = cvdata->outbuf;                               \
44         dstP.bp += dstY * ScanBytes(cvdata) + dstX * 3;         \
45     } while (0)
46 
47 #define PutPixelInc(pixel, red, green, blue)                    \
48     do {                                                        \
49         *dstP.bp++ = blue;                                      \
50         *dstP.bp++ = green;                                     \
51         *dstP.bp++ = red;                                       \
52     } while (0)
53 
54 #define EndOutputRow(cvdata, dstY, dstX1, dstX2)                \
55     do {                                                        \
56         SendRow(cvdata, dstY, dstX1, dstX2);                    \
57         dstP.bp += ScanBytes(cvdata) - (dstX2 - dstX1) * 3;     \
58     } while (0)
59 
60 #define EndOutputRect(cvdata, dstX1, dstY1, dstX2, dstY2)       \
61     SendBuffer(cvdata, dstX1, dstY1, dstX2, dstY2)
62