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00019 #define JPEG_INTERNALS
00020 #include "jinclude.h"
00021 #include "jpeglib.h"
00022
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00025
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00027
00028
00029 GLOBAL(void)
00030 jpeg_CreateCompress (j_compress_ptr cinfo, int version, size_t structsize)
00031 {
00032 int i;
00033
00034
00035 cinfo->mem = NULL;
00036 if (version != JPEG_LIB_VERSION)
00037 ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
00038 if (structsize != SIZEOF(struct jpeg_compress_struct))
00039 ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE,
00040 (int) SIZEOF(struct jpeg_compress_struct), (int) structsize);
00041
00042
00043
00044
00045
00046
00047
00048 {
00049 struct jpeg_error_mgr * err = cinfo->err;
00050 void * client_data = cinfo->client_data;
00051 MEMZERO(cinfo, SIZEOF(struct jpeg_compress_struct));
00052 cinfo->err = err;
00053 cinfo->client_data = client_data;
00054 }
00055 cinfo->is_decompressor = FALSE;
00056
00057
00058 jinit_memory_mgr((j_common_ptr) cinfo);
00059
00060
00061 cinfo->progress = NULL;
00062 cinfo->dest = NULL;
00063
00064 cinfo->comp_info = NULL;
00065
00066 for (i = 0; i < NUM_QUANT_TBLS; i++)
00067 cinfo->quant_tbl_ptrs[i] = NULL;
00068
00069 for (i = 0; i < NUM_HUFF_TBLS; i++) {
00070 cinfo->dc_huff_tbl_ptrs[i] = NULL;
00071 cinfo->ac_huff_tbl_ptrs[i] = NULL;
00072 }
00073
00074 cinfo->script_space = NULL;
00075
00076 cinfo->input_gamma = 1.0;
00077
00078
00079 cinfo->global_state = CSTATE_START;
00080 }
00081
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00085
00086
00087 GLOBAL(void)
00088 jpeg_destroy_compress (j_compress_ptr cinfo)
00089 {
00090 jpeg_destroy((j_common_ptr) cinfo);
00091 }
00092
00093
00094
00095
00096
00097
00098
00099 GLOBAL(void)
00100 jpeg_abort_compress (j_compress_ptr cinfo)
00101 {
00102 jpeg_abort((j_common_ptr) cinfo);
00103 }
00104
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00117
00118 GLOBAL(void)
00119 jpeg_suppress_tables (j_compress_ptr cinfo, boolean suppress)
00120 {
00121 int i;
00122 JQUANT_TBL * qtbl;
00123 JHUFF_TBL * htbl;
00124
00125 for (i = 0; i < NUM_QUANT_TBLS; i++) {
00126 if ((qtbl = cinfo->quant_tbl_ptrs[i]) != NULL)
00127 qtbl->sent_table = suppress;
00128 }
00129
00130 for (i = 0; i < NUM_HUFF_TBLS; i++) {
00131 if ((htbl = cinfo->dc_huff_tbl_ptrs[i]) != NULL)
00132 htbl->sent_table = suppress;
00133 if ((htbl = cinfo->ac_huff_tbl_ptrs[i]) != NULL)
00134 htbl->sent_table = suppress;
00135 }
00136 }
00137
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00144
00145
00146 GLOBAL(void)
00147 jpeg_finish_compress (j_compress_ptr cinfo)
00148 {
00149 JDIMENSION iMCU_row;
00150
00151 if (cinfo->global_state == CSTATE_SCANNING ||
00152 cinfo->global_state == CSTATE_RAW_OK) {
00153
00154 if (cinfo->next_scanline < cinfo->image_height)
00155 ERREXIT(cinfo, JERR_TOO_LITTLE_DATA);
00156 (*cinfo->master->finish_pass) (cinfo);
00157 } else if (cinfo->global_state != CSTATE_WRCOEFS)
00158 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00159
00160 while (! cinfo->master->is_last_pass) {
00161 (*cinfo->master->prepare_for_pass) (cinfo);
00162 for (iMCU_row = 0; iMCU_row < cinfo->total_iMCU_rows; iMCU_row++) {
00163 if (cinfo->progress != NULL) {
00164 cinfo->progress->pass_counter = (long) iMCU_row;
00165 cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows;
00166 (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
00167 }
00168
00169
00170
00171 if (! (*cinfo->coef->compress_data) (cinfo, (JSAMPIMAGE) NULL))
00172 ERREXIT(cinfo, JERR_CANT_SUSPEND);
00173 }
00174 (*cinfo->master->finish_pass) (cinfo);
00175 }
00176
00177 (*cinfo->marker->write_file_trailer) (cinfo);
00178 (*cinfo->dest->term_destination) (cinfo);
00179
00180 jpeg_abort((j_common_ptr) cinfo);
00181 }
00182
00183
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00188
00189
00190
00191 GLOBAL(void)
00192 jpeg_write_marker (j_compress_ptr cinfo, int marker,
00193 const JOCTET *dataptr, unsigned int datalen)
00194 {
00195 JMETHOD(void, write_marker_byte, (j_compress_ptr info, int val));
00196
00197 if (cinfo->next_scanline != 0 ||
00198 (cinfo->global_state != CSTATE_SCANNING &&
00199 cinfo->global_state != CSTATE_RAW_OK &&
00200 cinfo->global_state != CSTATE_WRCOEFS))
00201 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00202
00203 (*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
00204 write_marker_byte = cinfo->marker->write_marker_byte;
00205 while (datalen--) {
00206 (*write_marker_byte) (cinfo, *dataptr);
00207 dataptr++;
00208 }
00209 }
00210
00211
00212
00213 GLOBAL(void)
00214 jpeg_write_m_header (j_compress_ptr cinfo, int marker, unsigned int datalen)
00215 {
00216 if (cinfo->next_scanline != 0 ||
00217 (cinfo->global_state != CSTATE_SCANNING &&
00218 cinfo->global_state != CSTATE_RAW_OK &&
00219 cinfo->global_state != CSTATE_WRCOEFS))
00220 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00221
00222 (*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
00223 }
00224
00225 GLOBAL(void)
00226 jpeg_write_m_byte (j_compress_ptr cinfo, int val)
00227 {
00228 (*cinfo->marker->write_marker_byte) (cinfo, val);
00229 }
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00253 GLOBAL(void)
00254 jpeg_write_tables (j_compress_ptr cinfo)
00255 {
00256 if (cinfo->global_state != CSTATE_START)
00257 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00258
00259
00260 (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
00261 (*cinfo->dest->init_destination) (cinfo);
00262
00263 jinit_marker_writer(cinfo);
00264
00265 (*cinfo->marker->write_tables_only) (cinfo);
00266
00267 (*cinfo->dest->term_destination) (cinfo);
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00280 }