1/*
2 * Copyright (c) 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_c_ImageConvClearEdge  - Set edge of an image to a specific
30 *                                        color. (for float-point image)
31 *
32 * SYNOPSIS
33 *      mlib_status mlib_c_ImageConvClearEdge_Fp(mlib_image     *img,
34 *                                               mlib_s32       dx_l,
35 *                                               mlib_s32       dx_r,
36 *                                               mlib_s32       dy_t,
37 *                                               mlib_s32       dy_b,
38 *                                               const mlib_d64 *color,
39 *                                               mlib_s32       cmask)
40 *
41 * ARGUMENT
42 *      img       Pointer to an image.
43 *      dx_l      Number of columns on the left side of the
44 *                image to be cleared.
45 *      dx_r      Number of columns on the right side of the
46 *                image to be cleared.
47 *      dy_t      Number of rows on the top edge of the
48 *                image to be cleared.
49 *      dy_b      Number of rows on the top edge of the
50 *                image to be cleared.
51 *      color     Pointer to the color that the edges are set to.
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 *      img can have 1, 2, 3 or 4 channels of MLIB_FLOAT or MLIB_DOUBLE
58 *      data type.
59 *
60 * DESCRIPTION
61 *      Set edge of an image to a specific color.
62 *      The unselected channels are not overwritten.
63 *      If src and dst have just one channel,
64 *      cmask is ignored.
65 */
66
67#include "mlib_image.h"
68#include "mlib_ImageConvEdge.h"
69
70/***************************************************************/
71#define EDGES(chan, type, mask)                                           \
72{                                                                         \
73  type *pimg = (type *) mlib_ImageGetData(img);                           \
74  type color_i;                                                           \
75  mlib_s32 img_stride = mlib_ImageGetStride(img) / sizeof(type);          \
76  mlib_s32 i, j, l;                                                       \
77  mlib_s32 testchan;                                                      \
78                                                                          \
79  testchan = 1;                                                           \
80  for (l = chan - 1; l >= 0; l--) {                                       \
81    if ((mask & testchan) == 0) {                                         \
82      testchan <<= 1;                                                     \
83      continue;                                                           \
84    }                                                                     \
85    testchan <<= 1;                                                       \
86    color_i = (type) color[l];                                            \
87    for (j = 0; j < dx_l; j++) {                                          \
88      for (i = dy_t; i < (img_height - dy_b); i++) {                      \
89        pimg[i * img_stride + l + j * chan] = color_i;                    \
90      }                                                                   \
91    }                                                                     \
92    for (j = 0; j < dx_r; j++) {                                          \
93      for (i = dy_t; i < (img_height - dy_b); i++) {                      \
94        pimg[i * img_stride + l + (img_width - 1 - j) * chan] = color_i;  \
95      }                                                                   \
96    }                                                                     \
97    for (i = 0; i < dy_t; i++) {                                          \
98      for (j = 0; j < img_width; j++) {                                   \
99        pimg[i * img_stride + l + j * chan] = color_i;                    \
100      }                                                                   \
101    }                                                                     \
102    for (i = 0; i < dy_b; i++) {                                          \
103      for (j = 0; j < img_width; j++) {                                   \
104        pimg[(img_height - 1 - i) * img_stride + l + j * chan] = color_i; \
105      }                                                                   \
106    }                                                                     \
107  }                                                                       \
108}
109
110/***************************************************************/
111mlib_status mlib_ImageConvClearEdge_Fp(mlib_image     *img,
112                                       mlib_s32       dx_l,
113                                       mlib_s32       dx_r,
114                                       mlib_s32       dy_t,
115                                       mlib_s32       dy_b,
116                                       const mlib_d64 *color,
117                                       mlib_s32       cmask)
118{
119  mlib_s32 img_width  = mlib_ImageGetWidth(img);
120  mlib_s32 img_height = mlib_ImageGetHeight(img);
121  mlib_s32 channel    = mlib_ImageGetChannels(img);
122
123  if (dx_l + dx_r > img_width) {
124    dx_l = img_width;
125    dx_r = 0;
126  }
127
128  if (dy_t + dy_b > img_height) {
129    dy_t = img_height;
130    dy_b = 0;
131  }
132
133  if (channel == 1) cmask = 1;
134
135  switch (mlib_ImageGetType(img)) {
136    case MLIB_FLOAT:
137      EDGES(channel,mlib_f32, cmask);
138      break;
139    case MLIB_DOUBLE:
140      EDGES(channel,mlib_d64, cmask);
141      break;
142    default:
143      return MLIB_FAILURE;
144  }
145
146  return MLIB_SUCCESS;
147}
148
149/***************************************************************/
150