1/*
2 * Copyright (c) 1997, 2003, 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/*
28 * FUNCTIONS
29 * mlib_ImageConvCopyEdge - Copy src edges to dst edges
30 *
31 *
32 * SYNOPSIS
33 * mlib_status mlib_ImageConvCopyEdge(mlib_image *dst,
34 * const mlib_image *src,
35 * mlib_s32 dx_l,
36 * mlib_s32 dx_r,
37 * mlib_s32 dy_t,
38 * mlib_s32 dy_b,
39 * mlib_s32 cmask)
40 *
41 * ARGUMENT
42 * dst Pointer to an dst image.
43 * src Pointer to an src image.
44 * dx_l Number of columns on the left side of the
45 * image to be copyed.
46 * dx_r Number of columns on the right side of the
47 * image to be copyed.
48 * dy_t Number of rows on the top edge of the
49 * image to be copyed.
50 * dy_b Number of rows on the top edge of the
51 * image to be copyed.
52 * cmask Channel mask to indicate the channels to be convolved.
53 * Each bit of which represents a channel in the image. The
54 * channels corresponded to 1 bits are those to be processed.
55 *
56 * RESTRICTION
57 * The src and the dst must be the same type, same width, same height and have same number
58 * of channels (1, 2, 3, or 4). The unselected channels are not
59 * overwritten. If both src and dst have just one channel,
60 * cmask is ignored.
61 *
62 * DESCRIPTION
63 * Copy src edges to dst edges.
64 *
65 * The unselected channels are not overwritten.
66 * If src and dst have just one channel,
67 * cmask is ignored.
68 */
69
70#include "mlib_image.h"
71#include "mlib_ImageConvEdge.h"
72
73/***************************************************************/
74#define EDGES(chan, type, mask) \
75 { \
76 type *pdst = (type *) mlib_ImageGetData(dst); \
77 type *psrc = (type *) mlib_ImageGetData(src); \
78 mlib_s32 dst_stride = mlib_ImageGetStride(dst) / sizeof(type); \
79 mlib_s32 src_stride = mlib_ImageGetStride(src) / sizeof(type); \
80 mlib_s32 i, j, l; \
81 mlib_s32 testchan; \
82 \
83 testchan = 1; \
84 for (l = chan - 1; l >= 0; l--) { \
85 if ((mask & testchan) == 0) { \
86 testchan <<= 1; \
87 continue; \
88 } \
89 testchan <<= 1; \
90 for (j = 0; j < dx_l; j++) { \
91 for (i = dy_t; i < (img_height - dy_b); i++) { \
92 pdst[i*dst_stride + l + j*chan] = psrc[i*src_stride + l + j*chan]; \
93 } \
94 } \
95 for (j = 0; j < dx_r; j++) { \
96 for (i = dy_t; i < (img_height - dy_b); i++) { \
97 pdst[i*dst_stride + l+(img_width-1 - j)*chan] = \
98 psrc[i*src_stride + l+(img_width-1 - j)*chan]; \
99 } \
100 } \
101 for (i = 0; i < dy_t; i++) { \
102 for (j = 0; j < img_width; j++) { \
103 pdst[i*dst_stride + l + j*chan] = psrc[i*src_stride + l + j*chan]; \
104 } \
105 } \
106 for (i = 0; i < dy_b; i++) { \
107 for (j = 0; j < img_width; j++) { \
108 pdst[(img_height-1 - i)*dst_stride + l + j*chan] = \
109 psrc[(img_height-1 - i)*src_stride + l + j*chan]; \
110 } \
111 } \
112 } \
113 }
114
115/***************************************************************/
116mlib_status mlib_ImageConvCopyEdge(mlib_image *dst,
117 const mlib_image *src,
118 mlib_s32 dx_l,
119 mlib_s32 dx_r,
120 mlib_s32 dy_t,
121 mlib_s32 dy_b,
122 mlib_s32 cmask)
123{
124 mlib_s32 img_width = mlib_ImageGetWidth(dst);
125 mlib_s32 img_height = mlib_ImageGetHeight(dst);
126 mlib_s32 channel = mlib_ImageGetChannels(dst);
127
128 if (dx_l + dx_r > img_width) {
129 dx_l = img_width;
130 dx_r = 0;
131 }
132
133 if (dy_t + dy_b > img_height) {
134 dy_t = img_height;
135 dy_b = 0;
136 }
137
138 if (channel == 1)
139 cmask = 1;
140
141 switch (mlib_ImageGetType(src)) {
142 case MLIB_BIT:
143 return mlib_ImageConvCopyEdge_Bit(dst, src, dx_l, dx_r, dy_t, dy_b, cmask);
144 case MLIB_BYTE:
145 EDGES(channel, mlib_u8, cmask)
146 break;
147 case MLIB_SHORT:
148 case MLIB_USHORT:
149 EDGES(channel, mlib_u16, cmask)
150 break;
151 case MLIB_INT:
152 case MLIB_FLOAT:
153 EDGES(channel, mlib_u32, cmask)
154 break;
155 case MLIB_DOUBLE:
156 EDGES(channel, mlib_d64, cmask)
157 break;
158 default:
159 return MLIB_FAILURE;
160 }
161
162 return MLIB_SUCCESS;
163}
164
165/***************************************************************/
166