1 /*
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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
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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
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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24  */
25 
26 /*
27  * This file contains macro definitions for the Encoding category of
28  * the macros used by the generic scaleloop function.
29  *
30  * This implementation can encode the color information into 32-bit
31  * output pixels directly by using shift amounts to specify which
32  * bits of the 32-bit output pixel should contain the red, green,
33  * and blue components.
34  */
35 
36 #define DeclareDitherVars                                               \
37     int red_dither_shift, green_dither_shift, blue_dither_shift;
38 
39 #define InitDither(cvdata, clrdata, dstTW)                      \
40     do {                                                        \
41         red_dither_shift = clrdata->rOff;                       \
42         green_dither_shift = clrdata->gOff;                     \
43         blue_dither_shift = clrdata->bOff;                      \
44     } while (0)
45 
46 #define StartDitherLine(cvdata, dstX1, dstY)                    \
47     do {} while (0)
48 
49 #define DitherPixel(dstX, dstY, pixel, red, green, blue)        \
50     do {                                                        \
51         pixel = ((red << red_dither_shift) |                    \
52                  (green << green_dither_shift) |                \
53                  (blue << blue_dither_shift));                  \
54     } while (0)
55 
56 #define DitherBufComplete(cvdata, dstX1)                        \
57     do {} while (0)
58