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 32-bit pixels into an array
31  * of either bytes or longs such that the pixel for (srcX, srcY) is
32  * stored at index (srcOff + srcY * srcScan + srcX) in the array.
33  */
34 
35 #define DeclareOutputVars                               \
36     pixptr dstP;                                        \
37     int dst32;
38 
39 #define InitOutput(cvdata, clrdata, dstX, dstY)                 \
40     do {                                                        \
41         switch (clrdata->bitsperpixel) {                        \
42         case 8: dst32 = 0; break;                               \
43         case 32: dst32 = 2; break;                              \
44         default:                                                \
45             SignalError(0, JAVAPKG "InternalError",             \
46                         "unsupported screen depth");            \
47             return SCALEFAILURE;                                \
48         }                                                       \
49         img_check((ScanBytes(cvdata) & ((1 << dst32)-1)) == 0); \
50         dstP.vp = cvdata->outbuf;                               \
51         dstP.bp += dstY * ScanBytes(cvdata) + (dstX << dst32);  \
52     } while (0)
53 
54 #define PutPixelInc(pixel, red, green, blue)                    \
55     do {                                                        \
56         if (dst32) {                                            \
57             *dstP.ip++ = pixel;                                 \
58         } else {                                                \
59             *dstP.bp++ = ((unsigned char) pixel);               \
60         }                                                       \
61     } while (0)
62 
63 #define EndOutputRow(cvdata, dstY, dstX1, dstX2)                \
64     do {                                                        \
65         SendRow(cvdata, dstY, dstX1, dstX2);                    \
66         dstP.bp += (ScanBytes(cvdata)                           \
67                     - ((dstX2 - dstX1) << dst32));              \
68     } while (0)
69 
70 #define EndOutputRect(cvdata, dstX1, dstY1, dstX2, dstY2)       \
71     SendBuffer(cvdata, dstX1, dstY1, dstX2, dstY2)
72