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6417 | ashmew2 | 1 | /* |
2 | * transupp.c |
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3 | * |
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4 | * Copyright (C) 1997, Thomas G. Lane. |
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5 | * This file is part of the Independent JPEG Group's software. |
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6 | * For conditions of distribution and use, see the accompanying README file. |
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7 | * |
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8 | * This file contains image transformation routines and other utility code |
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9 | * used by the jpegtran sample application. These are NOT part of the core |
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10 | * JPEG library. But we keep these routines separate from jpegtran.c to |
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11 | * ease the task of maintaining jpegtran-like programs that have other user |
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12 | * interfaces. |
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13 | */ |
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14 | |||
15 | /* Although this file really shouldn't have access to the library internals, |
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16 | * it's helpful to let it call jround_up() and jcopy_block_row(). |
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17 | */ |
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18 | #define JPEG_INTERNALS |
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19 | |||
20 | #include "jinclude.h" |
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21 | #include "jpeglib.h" |
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22 | #include "transupp.h" /* My own external interface */ |
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23 | |||
24 | |||
25 | #if TRANSFORMS_SUPPORTED |
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26 | |||
27 | /* |
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28 | * Lossless image transformation routines. These routines work on DCT |
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29 | * coefficient arrays and thus do not require any lossy decompression |
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30 | * or recompression of the image. |
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31 | * Thanks to Guido Vollbeding for the initial design and code of this feature. |
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32 | * |
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33 | * Horizontal flipping is done in-place, using a single top-to-bottom |
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34 | * pass through the virtual source array. It will thus be much the |
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35 | * fastest option for images larger than main memory. |
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36 | * |
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37 | * The other routines require a set of destination virtual arrays, so they |
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38 | * need twice as much memory as jpegtran normally does. The destination |
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39 | * arrays are always written in normal scan order (top to bottom) because |
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40 | * the virtual array manager expects this. The source arrays will be scanned |
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41 | * in the corresponding order, which means multiple passes through the source |
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42 | * arrays for most of the transforms. That could result in much thrashing |
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43 | * if the image is larger than main memory. |
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44 | * |
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45 | * Some notes about the operating environment of the individual transform |
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46 | * routines: |
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47 | * 1. Both the source and destination virtual arrays are allocated from the |
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48 | * source JPEG object, and therefore should be manipulated by calling the |
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49 | * source's memory manager. |
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50 | * 2. The destination's component count should be used. It may be smaller |
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51 | * than the source's when forcing to grayscale. |
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52 | * 3. Likewise the destination's sampling factors should be used. When |
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53 | * forcing to grayscale the destination's sampling factors will be all 1, |
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54 | * and we may as well take that as the effective iMCU size. |
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55 | * 4. When "trim" is in effect, the destination's dimensions will be the |
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56 | * trimmed values but the source's will be untrimmed. |
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57 | * 5. All the routines assume that the source and destination buffers are |
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58 | * padded out to a full iMCU boundary. This is true, although for the |
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59 | * source buffer it is an undocumented property of jdcoefct.c. |
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60 | * Notes 2,3,4 boil down to this: generally we should use the destination's |
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61 | * dimensions and ignore the source's. |
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62 | */ |
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63 | |||
64 | |||
65 | LOCAL(void) |
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66 | do_flip_h (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
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67 | jvirt_barray_ptr *src_coef_arrays) |
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68 | /* Horizontal flip; done in-place, so no separate dest array is required */ |
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69 | { |
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70 | JDIMENSION MCU_cols, comp_width, blk_x, blk_y; |
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71 | int ci, k, offset_y; |
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72 | JBLOCKARRAY buffer; |
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73 | JCOEFPTR ptr1, ptr2; |
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74 | JCOEF temp1, temp2; |
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75 | jpeg_component_info *compptr; |
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76 | |||
77 | /* Horizontal mirroring of DCT blocks is accomplished by swapping |
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78 | * pairs of blocks in-place. Within a DCT block, we perform horizontal |
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79 | * mirroring by changing the signs of odd-numbered columns. |
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80 | * Partial iMCUs at the right edge are left untouched. |
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81 | */ |
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82 | MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE); |
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83 | |||
84 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
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85 | compptr = dstinfo->comp_info + ci; |
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86 | comp_width = MCU_cols * compptr->h_samp_factor; |
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87 | for (blk_y = 0; blk_y < compptr->height_in_blocks; |
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88 | blk_y += compptr->v_samp_factor) { |
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89 | buffer = (*srcinfo->mem->access_virt_barray) |
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90 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], blk_y, |
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91 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
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92 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
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93 | for (blk_x = 0; blk_x * 2 < comp_width; blk_x++) { |
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94 | ptr1 = buffer[offset_y][blk_x]; |
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95 | ptr2 = buffer[offset_y][comp_width - blk_x - 1]; |
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96 | /* this unrolled loop doesn't need to know which row it's on... */ |
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97 | for (k = 0; k < DCTSIZE2; k += 2) { |
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98 | temp1 = *ptr1; /* swap even column */ |
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99 | temp2 = *ptr2; |
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100 | *ptr1++ = temp2; |
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101 | *ptr2++ = temp1; |
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102 | temp1 = *ptr1; /* swap odd column with sign change */ |
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103 | temp2 = *ptr2; |
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104 | *ptr1++ = -temp2; |
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105 | *ptr2++ = -temp1; |
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106 | } |
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107 | } |
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108 | } |
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109 | } |
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110 | } |
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111 | } |
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112 | |||
113 | |||
114 | LOCAL(void) |
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115 | do_flip_v (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
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116 | jvirt_barray_ptr *src_coef_arrays, |
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117 | jvirt_barray_ptr *dst_coef_arrays) |
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118 | /* Vertical flip */ |
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119 | { |
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120 | JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y; |
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121 | int ci, i, j, offset_y; |
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122 | JBLOCKARRAY src_buffer, dst_buffer; |
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123 | JBLOCKROW src_row_ptr, dst_row_ptr; |
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124 | JCOEFPTR src_ptr, dst_ptr; |
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125 | jpeg_component_info *compptr; |
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126 | |||
127 | /* We output into a separate array because we can't touch different |
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128 | * rows of the source virtual array simultaneously. Otherwise, this |
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129 | * is a pretty straightforward analog of horizontal flip. |
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130 | * Within a DCT block, vertical mirroring is done by changing the signs |
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131 | * of odd-numbered rows. |
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132 | * Partial iMCUs at the bottom edge are copied verbatim. |
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133 | */ |
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134 | MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE); |
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135 | |||
136 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
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137 | compptr = dstinfo->comp_info + ci; |
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138 | comp_height = MCU_rows * compptr->v_samp_factor; |
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139 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
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140 | dst_blk_y += compptr->v_samp_factor) { |
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141 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
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142 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
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143 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
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144 | if (dst_blk_y < comp_height) { |
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145 | /* Row is within the mirrorable area. */ |
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146 | src_buffer = (*srcinfo->mem->access_virt_barray) |
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147 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
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148 | comp_height - dst_blk_y - (JDIMENSION) compptr->v_samp_factor, |
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149 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
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150 | } else { |
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151 | /* Bottom-edge blocks will be copied verbatim. */ |
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152 | src_buffer = (*srcinfo->mem->access_virt_barray) |
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153 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_y, |
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154 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
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155 | } |
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156 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
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157 | if (dst_blk_y < comp_height) { |
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158 | /* Row is within the mirrorable area. */ |
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159 | dst_row_ptr = dst_buffer[offset_y]; |
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160 | src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1]; |
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161 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
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162 | dst_blk_x++) { |
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163 | dst_ptr = dst_row_ptr[dst_blk_x]; |
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164 | src_ptr = src_row_ptr[dst_blk_x]; |
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165 | for (i = 0; i < DCTSIZE; i += 2) { |
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166 | /* copy even row */ |
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167 | for (j = 0; j < DCTSIZE; j++) |
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168 | *dst_ptr++ = *src_ptr++; |
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169 | /* copy odd row with sign change */ |
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170 | for (j = 0; j < DCTSIZE; j++) |
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171 | *dst_ptr++ = - *src_ptr++; |
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172 | } |
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173 | } |
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174 | } else { |
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175 | /* Just copy row verbatim. */ |
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176 | jcopy_block_row(src_buffer[offset_y], dst_buffer[offset_y], |
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177 | compptr->width_in_blocks); |
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178 | } |
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179 | } |
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180 | } |
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181 | } |
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182 | } |
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183 | |||
184 | |||
185 | LOCAL(void) |
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186 | do_transpose (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
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187 | jvirt_barray_ptr *src_coef_arrays, |
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188 | jvirt_barray_ptr *dst_coef_arrays) |
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189 | /* Transpose source into destination */ |
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190 | { |
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191 | JDIMENSION dst_blk_x, dst_blk_y; |
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192 | int ci, i, j, offset_x, offset_y; |
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193 | JBLOCKARRAY src_buffer, dst_buffer; |
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194 | JCOEFPTR src_ptr, dst_ptr; |
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195 | jpeg_component_info *compptr; |
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196 | |||
197 | /* Transposing pixels within a block just requires transposing the |
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198 | * DCT coefficients. |
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199 | * Partial iMCUs at the edges require no special treatment; we simply |
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200 | * process all the available DCT blocks for every component. |
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201 | */ |
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202 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
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203 | compptr = dstinfo->comp_info + ci; |
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204 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
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205 | dst_blk_y += compptr->v_samp_factor) { |
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206 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
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207 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
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208 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
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209 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
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210 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
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211 | dst_blk_x += compptr->h_samp_factor) { |
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212 | src_buffer = (*srcinfo->mem->access_virt_barray) |
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213 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x, |
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214 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
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215 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
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216 | src_ptr = src_buffer[offset_x][dst_blk_y + offset_y]; |
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217 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
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218 | for (i = 0; i < DCTSIZE; i++) |
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219 | for (j = 0; j < DCTSIZE; j++) |
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220 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
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221 | } |
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222 | } |
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223 | } |
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224 | } |
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225 | } |
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226 | } |
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227 | |||
228 | |||
229 | LOCAL(void) |
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230 | do_rot_90 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
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231 | jvirt_barray_ptr *src_coef_arrays, |
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232 | jvirt_barray_ptr *dst_coef_arrays) |
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233 | /* 90 degree rotation is equivalent to |
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234 | * 1. Transposing the image; |
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235 | * 2. Horizontal mirroring. |
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236 | * These two steps are merged into a single processing routine. |
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237 | */ |
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238 | { |
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239 | JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y; |
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240 | int ci, i, j, offset_x, offset_y; |
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241 | JBLOCKARRAY src_buffer, dst_buffer; |
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242 | JCOEFPTR src_ptr, dst_ptr; |
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243 | jpeg_component_info *compptr; |
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244 | |||
245 | /* Because of the horizontal mirror step, we can't process partial iMCUs |
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246 | * at the (output) right edge properly. They just get transposed and |
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247 | * not mirrored. |
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248 | */ |
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249 | MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE); |
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250 | |||
251 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
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252 | compptr = dstinfo->comp_info + ci; |
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253 | comp_width = MCU_cols * compptr->h_samp_factor; |
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254 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
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255 | dst_blk_y += compptr->v_samp_factor) { |
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256 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
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257 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
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258 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
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259 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
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260 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
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261 | dst_blk_x += compptr->h_samp_factor) { |
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262 | src_buffer = (*srcinfo->mem->access_virt_barray) |
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263 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x, |
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264 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
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265 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
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266 | src_ptr = src_buffer[offset_x][dst_blk_y + offset_y]; |
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267 | if (dst_blk_x < comp_width) { |
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268 | /* Block is within the mirrorable area. */ |
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269 | dst_ptr = dst_buffer[offset_y] |
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270 | [comp_width - dst_blk_x - offset_x - 1]; |
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271 | for (i = 0; i < DCTSIZE; i++) { |
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272 | for (j = 0; j < DCTSIZE; j++) |
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273 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
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274 | i++; |
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275 | for (j = 0; j < DCTSIZE; j++) |
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276 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
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277 | } |
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278 | } else { |
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279 | /* Edge blocks are transposed but not mirrored. */ |
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280 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
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281 | for (i = 0; i < DCTSIZE; i++) |
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282 | for (j = 0; j < DCTSIZE; j++) |
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283 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
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284 | } |
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285 | } |
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286 | } |
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287 | } |
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288 | } |
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289 | } |
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290 | } |
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291 | |||
292 | |||
293 | LOCAL(void) |
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294 | do_rot_270 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
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295 | jvirt_barray_ptr *src_coef_arrays, |
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296 | jvirt_barray_ptr *dst_coef_arrays) |
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297 | /* 270 degree rotation is equivalent to |
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298 | * 1. Horizontal mirroring; |
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299 | * 2. Transposing the image. |
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300 | * These two steps are merged into a single processing routine. |
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301 | */ |
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302 | { |
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303 | JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y; |
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304 | int ci, i, j, offset_x, offset_y; |
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305 | JBLOCKARRAY src_buffer, dst_buffer; |
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306 | JCOEFPTR src_ptr, dst_ptr; |
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307 | jpeg_component_info *compptr; |
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308 | |||
309 | /* Because of the horizontal mirror step, we can't process partial iMCUs |
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310 | * at the (output) bottom edge properly. They just get transposed and |
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311 | * not mirrored. |
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312 | */ |
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313 | MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE); |
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314 | |||
315 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
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316 | compptr = dstinfo->comp_info + ci; |
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317 | comp_height = MCU_rows * compptr->v_samp_factor; |
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318 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
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319 | dst_blk_y += compptr->v_samp_factor) { |
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320 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
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321 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
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322 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
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323 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
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324 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
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325 | dst_blk_x += compptr->h_samp_factor) { |
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326 | src_buffer = (*srcinfo->mem->access_virt_barray) |
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327 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x, |
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328 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
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329 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
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330 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
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331 | if (dst_blk_y < comp_height) { |
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332 | /* Block is within the mirrorable area. */ |
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333 | src_ptr = src_buffer[offset_x] |
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334 | [comp_height - dst_blk_y - offset_y - 1]; |
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335 | for (i = 0; i < DCTSIZE; i++) { |
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336 | for (j = 0; j < DCTSIZE; j++) { |
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337 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
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338 | j++; |
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339 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
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340 | } |
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341 | } |
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342 | } else { |
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343 | /* Edge blocks are transposed but not mirrored. */ |
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344 | src_ptr = src_buffer[offset_x][dst_blk_y + offset_y]; |
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345 | for (i = 0; i < DCTSIZE; i++) |
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346 | for (j = 0; j < DCTSIZE; j++) |
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347 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
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348 | } |
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349 | } |
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350 | } |
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351 | } |
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352 | } |
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353 | } |
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354 | } |
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355 | |||
356 | |||
357 | LOCAL(void) |
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358 | do_rot_180 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
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359 | jvirt_barray_ptr *src_coef_arrays, |
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360 | jvirt_barray_ptr *dst_coef_arrays) |
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361 | /* 180 degree rotation is equivalent to |
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362 | * 1. Vertical mirroring; |
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363 | * 2. Horizontal mirroring. |
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364 | * These two steps are merged into a single processing routine. |
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365 | */ |
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366 | { |
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367 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y; |
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368 | int ci, i, j, offset_y; |
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369 | JBLOCKARRAY src_buffer, dst_buffer; |
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370 | JBLOCKROW src_row_ptr, dst_row_ptr; |
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371 | JCOEFPTR src_ptr, dst_ptr; |
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372 | jpeg_component_info *compptr; |
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373 | |||
374 | MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE); |
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375 | MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE); |
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376 | |||
377 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
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378 | compptr = dstinfo->comp_info + ci; |
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379 | comp_width = MCU_cols * compptr->h_samp_factor; |
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380 | comp_height = MCU_rows * compptr->v_samp_factor; |
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381 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
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382 | dst_blk_y += compptr->v_samp_factor) { |
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383 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
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384 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
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385 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
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386 | if (dst_blk_y < comp_height) { |
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387 | /* Row is within the vertically mirrorable area. */ |
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388 | src_buffer = (*srcinfo->mem->access_virt_barray) |
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389 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
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390 | comp_height - dst_blk_y - (JDIMENSION) compptr->v_samp_factor, |
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391 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
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392 | } else { |
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393 | /* Bottom-edge rows are only mirrored horizontally. */ |
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394 | src_buffer = (*srcinfo->mem->access_virt_barray) |
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395 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_y, |
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396 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
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397 | } |
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398 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
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399 | if (dst_blk_y < comp_height) { |
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400 | /* Row is within the mirrorable area. */ |
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401 | dst_row_ptr = dst_buffer[offset_y]; |
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402 | src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1]; |
||
403 | /* Process the blocks that can be mirrored both ways. */ |
||
404 | for (dst_blk_x = 0; dst_blk_x < comp_width; dst_blk_x++) { |
||
405 | dst_ptr = dst_row_ptr[dst_blk_x]; |
||
406 | src_ptr = src_row_ptr[comp_width - dst_blk_x - 1]; |
||
407 | for (i = 0; i < DCTSIZE; i += 2) { |
||
408 | /* For even row, negate every odd column. */ |
||
409 | for (j = 0; j < DCTSIZE; j += 2) { |
||
410 | *dst_ptr++ = *src_ptr++; |
||
411 | *dst_ptr++ = - *src_ptr++; |
||
412 | } |
||
413 | /* For odd row, negate every even column. */ |
||
414 | for (j = 0; j < DCTSIZE; j += 2) { |
||
415 | *dst_ptr++ = - *src_ptr++; |
||
416 | *dst_ptr++ = *src_ptr++; |
||
417 | } |
||
418 | } |
||
419 | } |
||
420 | /* Any remaining right-edge blocks are only mirrored vertically. */ |
||
421 | for (; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) { |
||
422 | dst_ptr = dst_row_ptr[dst_blk_x]; |
||
423 | src_ptr = src_row_ptr[dst_blk_x]; |
||
424 | for (i = 0; i < DCTSIZE; i += 2) { |
||
425 | for (j = 0; j < DCTSIZE; j++) |
||
426 | *dst_ptr++ = *src_ptr++; |
||
427 | for (j = 0; j < DCTSIZE; j++) |
||
428 | *dst_ptr++ = - *src_ptr++; |
||
429 | } |
||
430 | } |
||
431 | } else { |
||
432 | /* Remaining rows are just mirrored horizontally. */ |
||
433 | dst_row_ptr = dst_buffer[offset_y]; |
||
434 | src_row_ptr = src_buffer[offset_y]; |
||
435 | /* Process the blocks that can be mirrored. */ |
||
436 | for (dst_blk_x = 0; dst_blk_x < comp_width; dst_blk_x++) { |
||
437 | dst_ptr = dst_row_ptr[dst_blk_x]; |
||
438 | src_ptr = src_row_ptr[comp_width - dst_blk_x - 1]; |
||
439 | for (i = 0; i < DCTSIZE2; i += 2) { |
||
440 | *dst_ptr++ = *src_ptr++; |
||
441 | *dst_ptr++ = - *src_ptr++; |
||
442 | } |
||
443 | } |
||
444 | /* Any remaining right-edge blocks are only copied. */ |
||
445 | for (; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) { |
||
446 | dst_ptr = dst_row_ptr[dst_blk_x]; |
||
447 | src_ptr = src_row_ptr[dst_blk_x]; |
||
448 | for (i = 0; i < DCTSIZE2; i++) |
||
449 | *dst_ptr++ = *src_ptr++; |
||
450 | } |
||
451 | } |
||
452 | } |
||
453 | } |
||
454 | } |
||
455 | } |
||
456 | |||
457 | |||
458 | LOCAL(void) |
||
459 | do_transverse (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
||
460 | jvirt_barray_ptr *src_coef_arrays, |
||
461 | jvirt_barray_ptr *dst_coef_arrays) |
||
462 | /* Transverse transpose is equivalent to |
||
463 | * 1. 180 degree rotation; |
||
464 | * 2. Transposition; |
||
465 | * or |
||
466 | * 1. Horizontal mirroring; |
||
467 | * 2. Transposition; |
||
468 | * 3. Horizontal mirroring. |
||
469 | * These steps are merged into a single processing routine. |
||
470 | */ |
||
471 | { |
||
472 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y; |
||
473 | int ci, i, j, offset_x, offset_y; |
||
474 | JBLOCKARRAY src_buffer, dst_buffer; |
||
475 | JCOEFPTR src_ptr, dst_ptr; |
||
476 | jpeg_component_info *compptr; |
||
477 | |||
478 | MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE); |
||
479 | MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE); |
||
480 | |||
481 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
||
482 | compptr = dstinfo->comp_info + ci; |
||
483 | comp_width = MCU_cols * compptr->h_samp_factor; |
||
484 | comp_height = MCU_rows * compptr->v_samp_factor; |
||
485 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
||
486 | dst_blk_y += compptr->v_samp_factor) { |
||
487 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
||
488 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
||
489 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
||
490 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
||
491 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
||
492 | dst_blk_x += compptr->h_samp_factor) { |
||
493 | src_buffer = (*srcinfo->mem->access_virt_barray) |
||
494 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x, |
||
495 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
||
496 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
||
497 | if (dst_blk_y < comp_height) { |
||
498 | src_ptr = src_buffer[offset_x] |
||
499 | [comp_height - dst_blk_y - offset_y - 1]; |
||
500 | if (dst_blk_x < comp_width) { |
||
501 | /* Block is within the mirrorable area. */ |
||
502 | dst_ptr = dst_buffer[offset_y] |
||
503 | [comp_width - dst_blk_x - offset_x - 1]; |
||
504 | for (i = 0; i < DCTSIZE; i++) { |
||
505 | for (j = 0; j < DCTSIZE; j++) { |
||
506 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
||
507 | j++; |
||
508 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
||
509 | } |
||
510 | i++; |
||
511 | for (j = 0; j < DCTSIZE; j++) { |
||
512 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
||
513 | j++; |
||
514 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
||
515 | } |
||
516 | } |
||
517 | } else { |
||
518 | /* Right-edge blocks are mirrored in y only */ |
||
519 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
||
520 | for (i = 0; i < DCTSIZE; i++) { |
||
521 | for (j = 0; j < DCTSIZE; j++) { |
||
522 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
||
523 | j++; |
||
524 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
||
525 | } |
||
526 | } |
||
527 | } |
||
528 | } else { |
||
529 | src_ptr = src_buffer[offset_x][dst_blk_y + offset_y]; |
||
530 | if (dst_blk_x < comp_width) { |
||
531 | /* Bottom-edge blocks are mirrored in x only */ |
||
532 | dst_ptr = dst_buffer[offset_y] |
||
533 | [comp_width - dst_blk_x - offset_x - 1]; |
||
534 | for (i = 0; i < DCTSIZE; i++) { |
||
535 | for (j = 0; j < DCTSIZE; j++) |
||
536 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
||
537 | i++; |
||
538 | for (j = 0; j < DCTSIZE; j++) |
||
539 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
||
540 | } |
||
541 | } else { |
||
542 | /* At lower right corner, just transpose, no mirroring */ |
||
543 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
||
544 | for (i = 0; i < DCTSIZE; i++) |
||
545 | for (j = 0; j < DCTSIZE; j++) |
||
546 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
||
547 | } |
||
548 | } |
||
549 | } |
||
550 | } |
||
551 | } |
||
552 | } |
||
553 | } |
||
554 | } |
||
555 | |||
556 | |||
557 | /* Request any required workspace. |
||
558 | * |
||
559 | * We allocate the workspace virtual arrays from the source decompression |
||
560 | * object, so that all the arrays (both the original data and the workspace) |
||
561 | * will be taken into account while making memory management decisions. |
||
562 | * Hence, this routine must be called after jpeg_read_header (which reads |
||
563 | * the image dimensions) and before jpeg_read_coefficients (which realizes |
||
564 | * the source's virtual arrays). |
||
565 | */ |
||
566 | |||
567 | GLOBAL(void) |
||
568 | jtransform_request_workspace (j_decompress_ptr srcinfo, |
||
569 | jpeg_transform_info *info) |
||
570 | { |
||
571 | jvirt_barray_ptr *coef_arrays = NULL; |
||
572 | jpeg_component_info *compptr; |
||
573 | int ci; |
||
574 | |||
575 | if (info->force_grayscale && |
||
576 | srcinfo->jpeg_color_space == JCS_YCbCr && |
||
577 | srcinfo->num_components == 3) { |
||
578 | /* We'll only process the first component */ |
||
579 | info->num_components = 1; |
||
580 | } else { |
||
581 | /* Process all the components */ |
||
582 | info->num_components = srcinfo->num_components; |
||
583 | } |
||
584 | |||
585 | switch (info->transform) { |
||
586 | case JXFORM_NONE: |
||
587 | case JXFORM_FLIP_H: |
||
588 | /* Don't need a workspace array */ |
||
589 | break; |
||
590 | case JXFORM_FLIP_V: |
||
591 | case JXFORM_ROT_180: |
||
592 | /* Need workspace arrays having same dimensions as source image. |
||
593 | * Note that we allocate arrays padded out to the next iMCU boundary, |
||
594 | * so that transform routines need not worry about missing edge blocks. |
||
595 | */ |
||
596 | coef_arrays = (jvirt_barray_ptr *) |
||
597 | (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE, |
||
598 | SIZEOF(jvirt_barray_ptr) * info->num_components); |
||
599 | for (ci = 0; ci < info->num_components; ci++) { |
||
600 | compptr = srcinfo->comp_info + ci; |
||
601 | coef_arrays[ci] = (*srcinfo->mem->request_virt_barray) |
||
602 | ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE, |
||
603 | (JDIMENSION) jround_up((long) compptr->width_in_blocks, |
||
604 | (long) compptr->h_samp_factor), |
||
605 | (JDIMENSION) jround_up((long) compptr->height_in_blocks, |
||
606 | (long) compptr->v_samp_factor), |
||
607 | (JDIMENSION) compptr->v_samp_factor); |
||
608 | } |
||
609 | break; |
||
610 | case JXFORM_TRANSPOSE: |
||
611 | case JXFORM_TRANSVERSE: |
||
612 | case JXFORM_ROT_90: |
||
613 | case JXFORM_ROT_270: |
||
614 | /* Need workspace arrays having transposed dimensions. |
||
615 | * Note that we allocate arrays padded out to the next iMCU boundary, |
||
616 | * so that transform routines need not worry about missing edge blocks. |
||
617 | */ |
||
618 | coef_arrays = (jvirt_barray_ptr *) |
||
619 | (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE, |
||
620 | SIZEOF(jvirt_barray_ptr) * info->num_components); |
||
621 | for (ci = 0; ci < info->num_components; ci++) { |
||
622 | compptr = srcinfo->comp_info + ci; |
||
623 | coef_arrays[ci] = (*srcinfo->mem->request_virt_barray) |
||
624 | ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE, |
||
625 | (JDIMENSION) jround_up((long) compptr->height_in_blocks, |
||
626 | (long) compptr->v_samp_factor), |
||
627 | (JDIMENSION) jround_up((long) compptr->width_in_blocks, |
||
628 | (long) compptr->h_samp_factor), |
||
629 | (JDIMENSION) compptr->h_samp_factor); |
||
630 | } |
||
631 | break; |
||
632 | } |
||
633 | info->workspace_coef_arrays = coef_arrays; |
||
634 | } |
||
635 | |||
636 | |||
637 | /* Transpose destination image parameters */ |
||
638 | |||
639 | LOCAL(void) |
||
640 | transpose_critical_parameters (j_compress_ptr dstinfo) |
||
641 | { |
||
642 | int tblno, i, j, ci, itemp; |
||
643 | jpeg_component_info *compptr; |
||
644 | JQUANT_TBL *qtblptr; |
||
645 | JDIMENSION dtemp; |
||
646 | UINT16 qtemp; |
||
647 | |||
648 | /* Transpose basic image dimensions */ |
||
649 | dtemp = dstinfo->image_width; |
||
650 | dstinfo->image_width = dstinfo->image_height; |
||
651 | dstinfo->image_height = dtemp; |
||
652 | |||
653 | /* Transpose sampling factors */ |
||
654 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
||
655 | compptr = dstinfo->comp_info + ci; |
||
656 | itemp = compptr->h_samp_factor; |
||
657 | compptr->h_samp_factor = compptr->v_samp_factor; |
||
658 | compptr->v_samp_factor = itemp; |
||
659 | } |
||
660 | |||
661 | /* Transpose quantization tables */ |
||
662 | for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) { |
||
663 | qtblptr = dstinfo->quant_tbl_ptrs[tblno]; |
||
664 | if (qtblptr != NULL) { |
||
665 | for (i = 0; i < DCTSIZE; i++) { |
||
666 | for (j = 0; j < i; j++) { |
||
667 | qtemp = qtblptr->quantval[i*DCTSIZE+j]; |
||
668 | qtblptr->quantval[i*DCTSIZE+j] = qtblptr->quantval[j*DCTSIZE+i]; |
||
669 | qtblptr->quantval[j*DCTSIZE+i] = qtemp; |
||
670 | } |
||
671 | } |
||
672 | } |
||
673 | } |
||
674 | } |
||
675 | |||
676 | |||
677 | /* Trim off any partial iMCUs on the indicated destination edge */ |
||
678 | |||
679 | LOCAL(void) |
||
680 | trim_right_edge (j_compress_ptr dstinfo) |
||
681 | { |
||
682 | int ci, max_h_samp_factor; |
||
683 | JDIMENSION MCU_cols; |
||
684 | |||
685 | /* We have to compute max_h_samp_factor ourselves, |
||
686 | * because it hasn't been set yet in the destination |
||
687 | * (and we don't want to use the source's value). |
||
688 | */ |
||
689 | max_h_samp_factor = 1; |
||
690 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
||
691 | int h_samp_factor = dstinfo->comp_info[ci].h_samp_factor; |
||
692 | max_h_samp_factor = MAX(max_h_samp_factor, h_samp_factor); |
||
693 | } |
||
694 | MCU_cols = dstinfo->image_width / (max_h_samp_factor * DCTSIZE); |
||
695 | if (MCU_cols > 0) /* can't trim to 0 pixels */ |
||
696 | dstinfo->image_width = MCU_cols * (max_h_samp_factor * DCTSIZE); |
||
697 | } |
||
698 | |||
699 | LOCAL(void) |
||
700 | trim_bottom_edge (j_compress_ptr dstinfo) |
||
701 | { |
||
702 | int ci, max_v_samp_factor; |
||
703 | JDIMENSION MCU_rows; |
||
704 | |||
705 | /* We have to compute max_v_samp_factor ourselves, |
||
706 | * because it hasn't been set yet in the destination |
||
707 | * (and we don't want to use the source's value). |
||
708 | */ |
||
709 | max_v_samp_factor = 1; |
||
710 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
||
711 | int v_samp_factor = dstinfo->comp_info[ci].v_samp_factor; |
||
712 | max_v_samp_factor = MAX(max_v_samp_factor, v_samp_factor); |
||
713 | } |
||
714 | MCU_rows = dstinfo->image_height / (max_v_samp_factor * DCTSIZE); |
||
715 | if (MCU_rows > 0) /* can't trim to 0 pixels */ |
||
716 | dstinfo->image_height = MCU_rows * (max_v_samp_factor * DCTSIZE); |
||
717 | } |
||
718 | |||
719 | |||
720 | /* Adjust output image parameters as needed. |
||
721 | * |
||
722 | * This must be called after jpeg_copy_critical_parameters() |
||
723 | * and before jpeg_write_coefficients(). |
||
724 | * |
||
725 | * The return value is the set of virtual coefficient arrays to be written |
||
726 | * (either the ones allocated by jtransform_request_workspace, or the |
||
727 | * original source data arrays). The caller will need to pass this value |
||
728 | * to jpeg_write_coefficients(). |
||
729 | */ |
||
730 | |||
731 | GLOBAL(jvirt_barray_ptr *) |
||
732 | jtransform_adjust_parameters (j_decompress_ptr srcinfo, |
||
733 | j_compress_ptr dstinfo, |
||
734 | jvirt_barray_ptr *src_coef_arrays, |
||
735 | jpeg_transform_info *info) |
||
736 | { |
||
737 | /* If force-to-grayscale is requested, adjust destination parameters */ |
||
738 | if (info->force_grayscale) { |
||
739 | /* We use jpeg_set_colorspace to make sure subsidiary settings get fixed |
||
740 | * properly. Among other things, the target h_samp_factor & v_samp_factor |
||
741 | * will get set to 1, which typically won't match the source. |
||
742 | * In fact we do this even if the source is already grayscale; that |
||
743 | * provides an easy way of coercing a grayscale JPEG with funny sampling |
||
744 | * factors to the customary 1,1. (Some decoders fail on other factors.) |
||
745 | */ |
||
746 | if ((dstinfo->jpeg_color_space == JCS_YCbCr && |
||
747 | dstinfo->num_components == 3) || |
||
748 | (dstinfo->jpeg_color_space == JCS_GRAYSCALE && |
||
749 | dstinfo->num_components == 1)) { |
||
750 | /* We have to preserve the source's quantization table number. */ |
||
751 | int sv_quant_tbl_no = dstinfo->comp_info[0].quant_tbl_no; |
||
752 | jpeg_set_colorspace(dstinfo, JCS_GRAYSCALE); |
||
753 | dstinfo->comp_info[0].quant_tbl_no = sv_quant_tbl_no; |
||
754 | } else { |
||
755 | /* Sorry, can't do it */ |
||
756 | ERREXIT(dstinfo, JERR_CONVERSION_NOTIMPL); |
||
757 | } |
||
758 | } |
||
759 | |||
760 | /* Correct the destination's image dimensions etc if necessary */ |
||
761 | switch (info->transform) { |
||
762 | case JXFORM_NONE: |
||
763 | /* Nothing to do */ |
||
764 | break; |
||
765 | case JXFORM_FLIP_H: |
||
766 | if (info->trim) |
||
767 | trim_right_edge(dstinfo); |
||
768 | break; |
||
769 | case JXFORM_FLIP_V: |
||
770 | if (info->trim) |
||
771 | trim_bottom_edge(dstinfo); |
||
772 | break; |
||
773 | case JXFORM_TRANSPOSE: |
||
774 | transpose_critical_parameters(dstinfo); |
||
775 | /* transpose does NOT have to trim anything */ |
||
776 | break; |
||
777 | case JXFORM_TRANSVERSE: |
||
778 | transpose_critical_parameters(dstinfo); |
||
779 | if (info->trim) { |
||
780 | trim_right_edge(dstinfo); |
||
781 | trim_bottom_edge(dstinfo); |
||
782 | } |
||
783 | break; |
||
784 | case JXFORM_ROT_90: |
||
785 | transpose_critical_parameters(dstinfo); |
||
786 | if (info->trim) |
||
787 | trim_right_edge(dstinfo); |
||
788 | break; |
||
789 | case JXFORM_ROT_180: |
||
790 | if (info->trim) { |
||
791 | trim_right_edge(dstinfo); |
||
792 | trim_bottom_edge(dstinfo); |
||
793 | } |
||
794 | break; |
||
795 | case JXFORM_ROT_270: |
||
796 | transpose_critical_parameters(dstinfo); |
||
797 | if (info->trim) |
||
798 | trim_bottom_edge(dstinfo); |
||
799 | break; |
||
800 | } |
||
801 | |||
802 | /* Return the appropriate output data set */ |
||
803 | if (info->workspace_coef_arrays != NULL) |
||
804 | return info->workspace_coef_arrays; |
||
805 | return src_coef_arrays; |
||
806 | } |
||
807 | |||
808 | |||
809 | /* Execute the actual transformation, if any. |
||
810 | * |
||
811 | * This must be called *after* jpeg_write_coefficients, because it depends |
||
812 | * on jpeg_write_coefficients to have computed subsidiary values such as |
||
813 | * the per-component width and height fields in the destination object. |
||
814 | * |
||
815 | * Note that some transformations will modify the source data arrays! |
||
816 | */ |
||
817 | |||
818 | GLOBAL(void) |
||
819 | jtransform_execute_transformation (j_decompress_ptr srcinfo, |
||
820 | j_compress_ptr dstinfo, |
||
821 | jvirt_barray_ptr *src_coef_arrays, |
||
822 | jpeg_transform_info *info) |
||
823 | { |
||
824 | jvirt_barray_ptr *dst_coef_arrays = info->workspace_coef_arrays; |
||
825 | |||
826 | switch (info->transform) { |
||
827 | case JXFORM_NONE: |
||
828 | break; |
||
829 | case JXFORM_FLIP_H: |
||
830 | do_flip_h(srcinfo, dstinfo, src_coef_arrays); |
||
831 | break; |
||
832 | case JXFORM_FLIP_V: |
||
833 | do_flip_v(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays); |
||
834 | break; |
||
835 | case JXFORM_TRANSPOSE: |
||
836 | do_transpose(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays); |
||
837 | break; |
||
838 | case JXFORM_TRANSVERSE: |
||
839 | do_transverse(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays); |
||
840 | break; |
||
841 | case JXFORM_ROT_90: |
||
842 | do_rot_90(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays); |
||
843 | break; |
||
844 | case JXFORM_ROT_180: |
||
845 | do_rot_180(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays); |
||
846 | break; |
||
847 | case JXFORM_ROT_270: |
||
848 | do_rot_270(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays); |
||
849 | break; |
||
850 | } |
||
851 | } |
||
852 | |||
853 | #endif /* TRANSFORMS_SUPPORTED */ |
||
854 | |||
855 | |||
856 | /* Setup decompression object to save desired markers in memory. |
||
857 | * This must be called before jpeg_read_header() to have the desired effect. |
||
858 | */ |
||
859 | |||
860 | GLOBAL(void) |
||
861 | jcopy_markers_setup (j_decompress_ptr srcinfo, JCOPY_OPTION option) |
||
862 | { |
||
863 | #ifdef SAVE_MARKERS_SUPPORTED |
||
864 | int m; |
||
865 | |||
866 | /* Save comments except under NONE option */ |
||
867 | if (option != JCOPYOPT_NONE) { |
||
868 | jpeg_save_markers(srcinfo, JPEG_COM, 0xFFFF); |
||
869 | } |
||
870 | /* Save all types of APPn markers iff ALL option */ |
||
871 | if (option == JCOPYOPT_ALL) { |
||
872 | for (m = 0; m < 16; m++) |
||
873 | jpeg_save_markers(srcinfo, JPEG_APP0 + m, 0xFFFF); |
||
874 | } |
||
875 | #endif /* SAVE_MARKERS_SUPPORTED */ |
||
876 | } |
||
877 | |||
878 | /* Copy markers saved in the given source object to the destination object. |
||
879 | * This should be called just after jpeg_start_compress() or |
||
880 | * jpeg_write_coefficients(). |
||
881 | * Note that those routines will have written the SOI, and also the |
||
882 | * JFIF APP0 or Adobe APP14 markers if selected. |
||
883 | */ |
||
884 | |||
885 | GLOBAL(void) |
||
886 | jcopy_markers_execute (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
||
887 | JCOPY_OPTION option) |
||
888 | { |
||
889 | jpeg_saved_marker_ptr marker; |
||
890 | |||
891 | /* In the current implementation, we don't actually need to examine the |
||
892 | * option flag here; we just copy everything that got saved. |
||
893 | * But to avoid confusion, we do not output JFIF and Adobe APP14 markers |
||
894 | * if the encoder library already wrote one. |
||
895 | */ |
||
896 | for (marker = srcinfo->marker_list; marker != NULL; marker = marker->next) { |
||
897 | if (dstinfo->write_JFIF_header && |
||
898 | marker->marker == JPEG_APP0 && |
||
899 | marker->data_length >= 5 && |
||
900 | GETJOCTET(marker->data[0]) == 0x4A && |
||
901 | GETJOCTET(marker->data[1]) == 0x46 && |
||
902 | GETJOCTET(marker->data[2]) == 0x49 && |
||
903 | GETJOCTET(marker->data[3]) == 0x46 && |
||
904 | GETJOCTET(marker->data[4]) == 0) |
||
905 | continue; /* reject duplicate JFIF */ |
||
906 | if (dstinfo->write_Adobe_marker && |
||
907 | marker->marker == JPEG_APP0+14 && |
||
908 | marker->data_length >= 5 && |
||
909 | GETJOCTET(marker->data[0]) == 0x41 && |
||
910 | GETJOCTET(marker->data[1]) == 0x64 && |
||
911 | GETJOCTET(marker->data[2]) == 0x6F && |
||
912 | GETJOCTET(marker->data[3]) == 0x62 && |
||
913 | GETJOCTET(marker->data[4]) == 0x65) |
||
914 | continue; /* reject duplicate Adobe */ |
||
915 | #ifdef NEED_FAR_POINTERS |
||
916 | /* We could use jpeg_write_marker if the data weren't FAR... */ |
||
917 | { |
||
918 | unsigned int i; |
||
919 | jpeg_write_m_header(dstinfo, marker->marker, marker->data_length); |
||
920 | for (i = 0; i < marker->data_length; i++) |
||
921 | jpeg_write_m_byte(dstinfo, marker->data[i]); |
||
922 | } |
||
923 | #else |
||
924 | jpeg_write_marker(dstinfo, marker->marker, |
||
925 | marker->data, marker->data_length); |
||
926 | #endif |
||
927 | } |
||
928 | }>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |