Doxygen Source Code Documentation
jcapistd.c File Reference
#include "jinclude.h"
#include "jpeglib.h"
Go to the source code of this file.
Defines | |
#define | JPEG_INTERNALS |
Functions | |
jpeg_start_compress (j_compress_ptr cinfo, boolean write_all_tables) | |
jpeg_write_scanlines (j_compress_ptr cinfo, JSAMPARRAY scanlines, JDIMENSION num_lines) | |
jpeg_write_raw_data (j_compress_ptr cinfo, JSAMPIMAGE data, JDIMENSION num_lines) |
Define Documentation
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Definition at line 17 of file jcapistd.c. |
Function Documentation
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Definition at line 38 of file jcapistd.c. References CSTATE_RAW_OK, CSTATE_SCANNING, CSTATE_START, jpeg_compress_struct::dest, ERREXIT1, jinit_compress_master(), jpeg_suppress_tables(), jpeg_compress_struct::master, jpeg_compress_struct::next_scanline, jpeg_compress_struct::raw_data_in, and write_all_tables. Referenced by write_JPEG_file().
00039 { 00040 if (cinfo->global_state != CSTATE_START) 00041 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); 00042 00043 if (write_all_tables) 00044 jpeg_suppress_tables(cinfo, FALSE); /* mark all tables to be written */ 00045 00046 /* (Re)initialize error mgr and destination modules */ 00047 (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo); 00048 (*cinfo->dest->init_destination) (cinfo); 00049 /* Perform master selection of active modules */ 00050 jinit_compress_master(cinfo); 00051 /* Set up for the first pass */ 00052 (*cinfo->master->prepare_for_pass) (cinfo); 00053 /* Ready for application to drive first pass through jpeg_write_scanlines 00054 * or jpeg_write_raw_data. 00055 */ 00056 cinfo->next_scanline = 0; 00057 cinfo->global_state = (cinfo->raw_data_in ? CSTATE_RAW_OK : CSTATE_SCANNING); 00058 } |
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Definition at line 120 of file jcapistd.c. References jpeg_comp_master::call_pass_startup, jpeg_compress_struct::coef, CSTATE_RAW_OK, ERREXIT, ERREXIT1, jpeg_compress_struct::image_height, JDIMENSION, JSAMPIMAGE, jpeg_compress_struct::master, jpeg_compress_struct::max_v_samp_factor, jpeg_compress_struct::next_scanline, num_lines, and WARNMS.
00122 { 00123 JDIMENSION lines_per_iMCU_row; 00124 00125 if (cinfo->global_state != CSTATE_RAW_OK) 00126 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); 00127 if (cinfo->next_scanline >= cinfo->image_height) { 00128 WARNMS(cinfo, JWRN_TOO_MUCH_DATA); 00129 return 0; 00130 } 00131 00132 /* Call progress monitor hook if present */ 00133 if (cinfo->progress != NULL) { 00134 cinfo->progress->pass_counter = (long) cinfo->next_scanline; 00135 cinfo->progress->pass_limit = (long) cinfo->image_height; 00136 (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo); 00137 } 00138 00139 /* Give master control module another chance if this is first call to 00140 * jpeg_write_raw_data. This lets output of the frame/scan headers be 00141 * delayed so that application can write COM, etc, markers between 00142 * jpeg_start_compress and jpeg_write_raw_data. 00143 */ 00144 if (cinfo->master->call_pass_startup) 00145 (*cinfo->master->pass_startup) (cinfo); 00146 00147 /* Verify that at least one iMCU row has been passed. */ 00148 lines_per_iMCU_row = cinfo->max_v_samp_factor * DCTSIZE; 00149 if (num_lines < lines_per_iMCU_row) 00150 ERREXIT(cinfo, JERR_BUFFER_SIZE); 00151 00152 /* Directly compress the row. */ 00153 if (! (*cinfo->coef->compress_data) (cinfo, data)) { 00154 /* If compressor did not consume the whole row, suspend processing. */ 00155 return 0; 00156 } 00157 00158 /* OK, we processed one iMCU row. */ 00159 cinfo->next_scanline += lines_per_iMCU_row; 00160 return lines_per_iMCU_row; 00161 } |
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Definition at line 77 of file jcapistd.c. References jpeg_comp_master::call_pass_startup, CSTATE_SCANNING, ERREXIT1, jpeg_compress_struct::image_height, JDIMENSION, JSAMPARRAY, jpeg_compress_struct::main, jpeg_compress_struct::master, jpeg_compress_struct::next_scanline, num_lines, scanlines, and WARNMS. Referenced by write_JPEG_file().
00079 { 00080 JDIMENSION row_ctr, rows_left; 00081 00082 if (cinfo->global_state != CSTATE_SCANNING) 00083 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); 00084 if (cinfo->next_scanline >= cinfo->image_height) 00085 WARNMS(cinfo, JWRN_TOO_MUCH_DATA); 00086 00087 /* Call progress monitor hook if present */ 00088 if (cinfo->progress != NULL) { 00089 cinfo->progress->pass_counter = (long) cinfo->next_scanline; 00090 cinfo->progress->pass_limit = (long) cinfo->image_height; 00091 (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo); 00092 } 00093 00094 /* Give master control module another chance if this is first call to 00095 * jpeg_write_scanlines. This lets output of the frame/scan headers be 00096 * delayed so that application can write COM, etc, markers between 00097 * jpeg_start_compress and jpeg_write_scanlines. 00098 */ 00099 if (cinfo->master->call_pass_startup) 00100 (*cinfo->master->pass_startup) (cinfo); 00101 00102 /* Ignore any extra scanlines at bottom of image. */ 00103 rows_left = cinfo->image_height - cinfo->next_scanline; 00104 if (num_lines > rows_left) 00105 num_lines = rows_left; 00106 00107 row_ctr = 0; 00108 (*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, num_lines); 00109 cinfo->next_scanline += row_ctr; 00110 return row_ctr; 00111 } |