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1 /* |
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2 * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 |
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27 /* |
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28 * FUNCTIONS |
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29 * mlib_ImageConvCopyEdge - Copy src edges to dst edges |
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30 * |
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31 * |
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32 * SYNOPSIS |
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33 * mlib_status mlib_ImageConvCopyEdge(mlib_image *dst, |
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34 * const mlib_image *src, |
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35 * mlib_s32 dx_l, |
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36 * mlib_s32 dx_r, |
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37 * mlib_s32 dy_t, |
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38 * mlib_s32 dy_b, |
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39 * mlib_s32 cmask) |
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40 * |
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41 * ARGUMENT |
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42 * dst Pointer to an dst image. |
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43 * src Pointer to an src image. |
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44 * dx_l Number of columns on the left side of the |
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45 * image to be copyed. |
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46 * dx_r Number of columns on the right side of the |
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47 * image to be copyed. |
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48 * dy_t Number of rows on the top edge of the |
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49 * image to be copyed. |
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50 * dy_b Number of rows on the top edge of the |
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51 * image to be copyed. |
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52 * cmask Channel mask to indicate the channels to be convolved. |
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53 * Each bit of which represents a channel in the image. The |
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54 * channels corresponded to 1 bits are those to be processed. |
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55 * |
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56 * RESTRICTION |
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57 * The src and the dst must be the same type, same width, same height and have same number |
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58 * of channels (1, 2, 3, or 4). The unselected channels are not |
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59 * overwritten. If both src and dst have just one channel, |
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60 * cmask is ignored. |
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61 * |
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62 * DESCRIPTION |
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63 * Copy src edges to dst edges. |
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64 * |
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65 * The unselected channels are not overwritten. |
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66 * If src and dst have just one channel, |
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67 * cmask is ignored. |
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68 */ |
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69 |
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70 #include "mlib_image.h" |
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71 #include "mlib_ImageConvEdge.h" |
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72 |
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73 /***************************************************************/ |
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74 #define EDGES(chan, type, mask) \ |
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75 { \ |
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76 type *pdst = (type *) mlib_ImageGetData(dst); \ |
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77 type *psrc = (type *) mlib_ImageGetData(src); \ |
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78 mlib_s32 dst_stride = mlib_ImageGetStride(dst) / sizeof(type); \ |
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79 mlib_s32 src_stride = mlib_ImageGetStride(src) / sizeof(type); \ |
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80 mlib_s32 i, j, l; \ |
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81 mlib_s32 testchan; \ |
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82 \ |
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83 testchan = 1; \ |
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84 for (l = chan - 1; l >= 0; l--) { \ |
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85 if ((mask & testchan) == 0) { \ |
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86 testchan <<= 1; \ |
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87 continue; \ |
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88 } \ |
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89 testchan <<= 1; \ |
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90 for (j = 0; j < dx_l; j++) { \ |
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91 for (i = dy_t; i < (img_height - dy_b); i++) { \ |
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92 pdst[i*dst_stride + l + j*chan] = psrc[i*src_stride + l + j*chan]; \ |
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93 } \ |
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94 } \ |
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95 for (j = 0; j < dx_r; j++) { \ |
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96 for (i = dy_t; i < (img_height - dy_b); i++) { \ |
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97 pdst[i*dst_stride + l+(img_width-1 - j)*chan] = \ |
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98 psrc[i*src_stride + l+(img_width-1 - j)*chan]; \ |
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99 } \ |
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100 } \ |
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101 for (i = 0; i < dy_t; i++) { \ |
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102 for (j = 0; j < img_width; j++) { \ |
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103 pdst[i*dst_stride + l + j*chan] = psrc[i*src_stride + l + j*chan]; \ |
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104 } \ |
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105 } \ |
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106 for (i = 0; i < dy_b; i++) { \ |
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107 for (j = 0; j < img_width; j++) { \ |
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108 pdst[(img_height-1 - i)*dst_stride + l + j*chan] = \ |
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109 psrc[(img_height-1 - i)*src_stride + l + j*chan]; \ |
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110 } \ |
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111 } \ |
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112 } \ |
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113 } |
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114 |
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115 /***************************************************************/ |
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116 mlib_status mlib_ImageConvCopyEdge(mlib_image *dst, |
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117 const mlib_image *src, |
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118 mlib_s32 dx_l, |
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119 mlib_s32 dx_r, |
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120 mlib_s32 dy_t, |
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121 mlib_s32 dy_b, |
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122 mlib_s32 cmask) |
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123 { |
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124 mlib_s32 img_width = mlib_ImageGetWidth(dst); |
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125 mlib_s32 img_height = mlib_ImageGetHeight(dst); |
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126 mlib_s32 channel = mlib_ImageGetChannels(dst); |
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127 |
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128 if (dx_l + dx_r > img_width) { |
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129 dx_l = img_width; |
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130 dx_r = 0; |
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131 } |
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132 |
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133 if (dy_t + dy_b > img_height) { |
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134 dy_t = img_height; |
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135 dy_b = 0; |
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136 } |
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137 |
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138 if (channel == 1) |
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139 cmask = 1; |
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140 |
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141 switch (mlib_ImageGetType(src)) { |
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142 case MLIB_BIT: |
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143 return mlib_ImageConvCopyEdge_Bit(dst, src, dx_l, dx_r, dy_t, dy_b, cmask); |
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144 case MLIB_BYTE: |
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145 EDGES(channel, mlib_u8, cmask) |
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146 break; |
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147 case MLIB_SHORT: |
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148 case MLIB_USHORT: |
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149 EDGES(channel, mlib_u16, cmask) |
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150 break; |
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151 case MLIB_INT: |
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152 case MLIB_FLOAT: |
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153 EDGES(channel, mlib_u32, cmask) |
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154 break; |
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155 case MLIB_DOUBLE: |
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156 EDGES(channel, mlib_d64, cmask) |
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157 break; |
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158 default: |
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159 return MLIB_FAILURE; |
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160 } |
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161 |
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162 return MLIB_SUCCESS; |
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163 } |
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164 |
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165 /***************************************************************/ |