Doxygen Source Code Documentation
jutils.c File Reference
#include "jinclude.h"#include "jpeglib.h"Go to the source code of this file.
Defines | |
| #define | JPEG_INTERNALS |
| #define | FMEMCOPY(dest, src, size) MEMCOPY(dest,src,size) |
| #define | FMEMZERO(target, size) MEMZERO(target,size) |
Functions | |
| jdiv_round_up (long a, long b) | |
| jround_up (long a, long b) | |
| jcopy_sample_rows (JSAMPARRAY input_array, int source_row, JSAMPARRAY output_array, int dest_row, int num_rows, JDIMENSION num_cols) | |
| jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row, JDIMENSION num_blocks) | |
| jzero_far (void FAR *target, size_t bytestozero) | |
Variables | |
| const int | jpeg_natural_order [DCTSIZE2+16] |
Define Documentation
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Definition at line 100 of file jutils.c. Referenced by jcopy_block_row(), and jcopy_sample_rows(). |
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Definition at line 101 of file jutils.c. Referenced by jzero_far(). |
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Function Documentation
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Definition at line 145 of file jutils.c. References FMEMCOPY, JBLOCKROW, JCOEF, JCOEFPTR, JDIMENSION, output_row, and SIZEOF. Referenced by decompress_smooth_data(), and do_flip_v().
00148 {
00149 #ifdef FMEMCOPY
00150 FMEMCOPY(output_row, input_row, num_blocks * (DCTSIZE2 * SIZEOF(JCOEF)));
00151 #else
00152 register JCOEFPTR inptr, outptr;
00153 register long count;
00154
00155 inptr = (JCOEFPTR) input_row;
00156 outptr = (JCOEFPTR) output_row;
00157 for (count = (long) num_blocks * DCTSIZE2; count > 0; count--) {
00158 *outptr++ = *inptr++;
00159 }
00160 #endif
00161 }
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Definition at line 111 of file jutils.c. References dest_row, FMEMCOPY, JDIMENSION, JSAMPARRAY, JSAMPLE, JSAMPROW, num_cols, num_rows, output_array, SIZEOF, and source_row. Referenced by expand_bottom_edge(), fullsize_downsample(), grayscale_convert(), h2v2_upsample(), int_upsample(), merged_2v_upsample(), and pre_process_context().
00119 {
00120 register JSAMPROW inptr, outptr;
00121 #ifdef FMEMCOPY
00122 register size_t count = (size_t) (num_cols * SIZEOF(JSAMPLE));
00123 #else
00124 register JDIMENSION count;
00125 #endif
00126 register int row;
00127
00128 input_array += source_row;
00129 output_array += dest_row;
00130
00131 for (row = num_rows; row > 0; row--) {
00132 inptr = *input_array++;
00133 outptr = *output_array++;
00134 #ifdef FMEMCOPY
00135 FMEMCOPY(outptr, inptr, count);
00136 #else
00137 for (count = num_cols; count > 0; count--)
00138 *outptr++ = *inptr++; /* needn't bother with GETJSAMPLE() here */
00139 #endif
00140 }
00141 }
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Definition at line 72 of file jutils.c. Referenced by initial_setup(), jpeg_calc_output_dimensions(), and per_scan_setup().
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Definition at line 81 of file jutils.c. Referenced by jinit_c_coef_controller(), jinit_c_main_controller(), jinit_d_coef_controller(), jinit_d_post_controller(), jinit_upsampler(), and jtransform_request_workspace().
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Definition at line 165 of file jutils.c. References bytestozero, and FMEMZERO. Referenced by access_virt_barray(), access_virt_sarray(), compress_data(), compress_first_pass(), decompress_onepass(), quantize_fs_dither(), quantize_ord_dither(), start_pass_1_quant(), start_pass_2_quant(), and transencode_coef_controller().
00168 {
00169 #ifdef FMEMZERO
00170 FMEMZERO(target, bytestozero);
00171 #else
00172 register char FAR * ptr = (char FAR *) target;
00173 register size_t count;
00174
00175 for (count = bytestozero; count > 0; count--) {
00176 *ptr++ = 0;
00177 }
00178 #endif
00179 }
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Variable Documentation
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Initial value: {
0, 1, 8, 16, 9, 2, 3, 10,
17, 24, 32, 25, 18, 11, 4, 5,
12, 19, 26, 33, 40, 48, 41, 34,
27, 20, 13, 6, 7, 14, 21, 28,
35, 42, 49, 56, 57, 50, 43, 36,
29, 22, 15, 23, 30, 37, 44, 51,
58, 59, 52, 45, 38, 31, 39, 46,
53, 60, 61, 54, 47, 55, 62, 63,
63, 63, 63, 63, 63, 63, 63, 63,
63, 63, 63, 63, 63, 63, 63, 63
} |
