ReactOS  0.4.15-dev-1384-g878186b
jcapistd.c File Reference
#include "jinclude.h"
#include "jpeglib.h"
Include dependency graph for jcapistd.c:

Go to the source code of this file.

Macros

#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)
 

Macro Definition Documentation

◆ JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 18 of file jcapistd.c.

Function Documentation

◆ jpeg_start_compress()

jpeg_start_compress ( j_compress_ptr  cinfo,
boolean  write_all_tables 
)

Definition at line 39 of file jcapistd.c.

40 {
41  if (cinfo->global_state != CSTATE_START)
42  ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
43 
44  if (write_all_tables)
45  jpeg_suppress_tables(cinfo, FALSE); /* mark all tables to be written */
46 
47  /* (Re)initialize error mgr and destination modules */
48  (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
49  (*cinfo->dest->init_destination) (cinfo);
50  /* Perform master selection of active modules */
51  jinit_compress_master(cinfo);
52  /* Set up for the first pass */
53  (*cinfo->master->prepare_for_pass) (cinfo);
54  /* Ready for application to drive first pass through jpeg_write_scanlines
55  * or jpeg_write_raw_data.
56  */
57  cinfo->next_scanline = 0;
58  cinfo->global_state = (cinfo->raw_data_in ? CSTATE_RAW_OK : CSTATE_SCANNING);
59 }
#define CSTATE_START
Definition: jpegint.h:26
#define CSTATE_RAW_OK
Definition: jpegint.h:28
#define CSTATE_SCANNING
Definition: jpegint.h:27
jpeg_suppress_tables(j_compress_ptr cinfo, boolean suppress)
Definition: jcapimin.c:127
JDIMENSION next_scanline
Definition: jpeglib.h:395
#define FALSE
Definition: types.h:117
struct jpeg_destination_mgr * dest
Definition: jpeglib.h:295
#define ERREXIT1(cinfo, code, p1)
Definition: jerror.h:212
boolean write_all_tables
Definition: jpeglib.h:1014
jinit_compress_master(j_compress_ptr cinfo)
Definition: jcinit.c:193
boolean raw_data_in
Definition: jpeglib.h:357
struct jpeg_comp_master * master
Definition: jpeglib.h:443

Referenced by main(), and write_JPEG_file().

◆ jpeg_write_raw_data()

jpeg_write_raw_data ( j_compress_ptr  cinfo,
JSAMPIMAGE  data,
JDIMENSION  num_lines 
)

Definition at line 121 of file jcapistd.c.

123 {
124  JDIMENSION lines_per_iMCU_row;
125 
126  if (cinfo->global_state != CSTATE_RAW_OK)
127  ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
128  if (cinfo->next_scanline >= cinfo->image_height) {
129  WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
130  return 0;
131  }
132 
133  /* Call progress monitor hook if present */
134  if (cinfo->progress != NULL) {
135  cinfo->progress->pass_counter = (long) cinfo->next_scanline;
136  cinfo->progress->pass_limit = (long) cinfo->image_height;
137  (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
138  }
139 
140  /* Give master control module another chance if this is first call to
141  * jpeg_write_raw_data. This lets output of the frame/scan headers be
142  * delayed so that application can write COM, etc, markers between
143  * jpeg_start_compress and jpeg_write_raw_data.
144  */
145  if (cinfo->master->call_pass_startup)
146  (*cinfo->master->pass_startup) (cinfo);
147 
148  /* Verify that at least one iMCU row has been passed. */
149  lines_per_iMCU_row = cinfo->max_v_samp_factor * cinfo->min_DCT_v_scaled_size;
150  if (num_lines < lines_per_iMCU_row)
151  ERREXIT(cinfo, JERR_BUFFER_SIZE);
152 
153  /* Directly compress the row. */
154  if (! (*cinfo->coef->compress_data) (cinfo, data)) {
155  /* If compressor did not consume the whole row, suspend processing. */
156  return 0;
157  }
158 
159  /* OK, we processed one iMCU row. */
160  cinfo->next_scanline += lines_per_iMCU_row;
161  return lines_per_iMCU_row;
162 }
#define ERREXIT(msg)
Definition: rdjpgcom.c:72
JDIMENSION image_height
Definition: jpeglib.h:303
JSAMPARRAY JDIMENSION num_lines
Definition: jpeglib.h:1016
#define CSTATE_RAW_OK
Definition: jpegint.h:28
JDIMENSION next_scanline
Definition: jpeglib.h:395
struct jpeg_c_coef_controller * coef
Definition: jpeglib.h:446
#define WARNMS(cinfo, code)
Definition: jerror.h:251
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl.h:1950
#define ERREXIT1(cinfo, code, p1)
Definition: jerror.h:212
#define long
Definition: qsort.c:33
#define NULL
Definition: types.h:112
unsigned int JDIMENSION
Definition: jmorecfg.h:229
struct jpeg_comp_master * master
Definition: jpeglib.h:443

◆ jpeg_write_scanlines()

jpeg_write_scanlines ( j_compress_ptr  cinfo,
JSAMPARRAY  scanlines,
JDIMENSION  num_lines 
)

Definition at line 78 of file jcapistd.c.

80 {
81  JDIMENSION row_ctr, rows_left;
82 
83  if (cinfo->global_state != CSTATE_SCANNING)
84  ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
85  if (cinfo->next_scanline >= cinfo->image_height)
86  WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
87 
88  /* Call progress monitor hook if present */
89  if (cinfo->progress != NULL) {
90  cinfo->progress->pass_counter = (long) cinfo->next_scanline;
91  cinfo->progress->pass_limit = (long) cinfo->image_height;
92  (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
93  }
94 
95  /* Give master control module another chance if this is first call to
96  * jpeg_write_scanlines. This lets output of the frame/scan headers be
97  * delayed so that application can write COM, etc, markers between
98  * jpeg_start_compress and jpeg_write_scanlines.
99  */
100  if (cinfo->master->call_pass_startup)
101  (*cinfo->master->pass_startup) (cinfo);
102 
103  /* Ignore any extra scanlines at bottom of image. */
104  rows_left = cinfo->image_height - cinfo->next_scanline;
105  if (num_lines > rows_left)
106  num_lines = rows_left;
107 
108  row_ctr = 0;
109  (*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, num_lines);
110  cinfo->next_scanline += row_ctr;
111  return row_ctr;
112 }
JDIMENSION image_height
Definition: jpeglib.h:303
JSAMPARRAY JDIMENSION num_lines
Definition: jpeglib.h:1016
#define CSTATE_SCANNING
Definition: jpegint.h:27
JDIMENSION next_scanline
Definition: jpeglib.h:395
struct jpeg_c_main_controller * main
Definition: jpeglib.h:444
#define WARNMS(cinfo, code)
Definition: jerror.h:251
#define ERREXIT1(cinfo, code, p1)
Definition: jerror.h:212
JSAMPARRAY scanlines
Definition: jpeglib.h:1016
#define long
Definition: qsort.c:33
#define NULL
Definition: types.h:112
unsigned int JDIMENSION
Definition: jmorecfg.h:229
struct jpeg_comp_master * master
Definition: jpeglib.h:443

Referenced by main(), and write_JPEG_file().