4
* Copyright (C) 1991-1998, Thomas G. Lane.
5
* Modified 2002-2009 by Guido Vollbeding.
6
* This file is part of the Independent JPEG Group's software.
7
* For conditions of distribution and use, see the accompanying README file.
9
* This file defines the application interface for the JPEG library.
10
* Most applications using the library need only include this file,
11
* and perhaps jerror.h if they want to know the exact error codes.
18
* First we include the configuration files that record how this
19
* installation of the JPEG library is set up. jconfig.h can be
20
* generated automatically for many systems. jmorecfg.h contains
21
* manual configuration options that most people need not worry about.
24
#ifndef JCONFIG_INCLUDED /* in case jinclude.h already did */
25
#include "jconfig.h" /* widely used configuration options */
27
#include "jmorecfg.h" /* seldom changed options */
31
#ifndef DONT_USE_EXTERN_C
36
/* Version ID for the JPEG library.
37
* Might be useful for tests like "#if JPEG_LIB_VERSION >= 80".
40
#define JPEG_LIB_VERSION 80 /* Version 8.0 */
43
/* Various constants determining the sizes of things.
44
* All of these are specified by the JPEG standard, so don't change them
45
* if you want to be compatible.
48
#define DCTSIZE 8 /* The basic DCT block is 8x8 samples */
49
#define DCTSIZE2 64 /* DCTSIZE squared; # of elements in a block */
50
#define NUM_QUANT_TBLS 4 /* Quantization tables are numbered 0..3 */
51
#define NUM_HUFF_TBLS 4 /* Huffman tables are numbered 0..3 */
52
#define NUM_ARITH_TBLS 16 /* Arith-coding tables are numbered 0..15 */
53
#define MAX_COMPS_IN_SCAN 4 /* JPEG limit on # of components in one scan */
54
#define MAX_SAMP_FACTOR 4 /* JPEG limit on sampling factors */
55
/* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard;
56
* the PostScript DCT filter can emit files with many more than 10 blocks/MCU.
57
* If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU
58
* to handle it. We even let you do this from the jconfig.h file. However,
59
* we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe
60
* sometimes emits noncompliant files doesn't mean you should too.
62
#define C_MAX_BLOCKS_IN_MCU 10 /* compressor's limit on blocks per MCU */
63
#ifndef D_MAX_BLOCKS_IN_MCU
64
#define D_MAX_BLOCKS_IN_MCU 10 /* decompressor's limit on blocks per MCU */
68
/* Data structures for images (arrays of samples and of DCT coefficients).
69
* On 80x86 machines, the image arrays are too big for near pointers,
70
* but the pointer arrays can fit in near memory.
73
typedef JSAMPLE FAR *JSAMPROW; /* ptr to one image row of pixel samples. */
74
typedef JSAMPROW *JSAMPARRAY; /* ptr to some rows (a 2-D sample array) */
75
typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */
77
typedef JCOEF JBLOCK[DCTSIZE2]; /* one block of coefficients */
78
typedef JBLOCK FAR *JBLOCKROW; /* pointer to one row of coefficient blocks */
79
typedef JBLOCKROW *JBLOCKARRAY; /* a 2-D array of coefficient blocks */
80
typedef JBLOCKARRAY *JBLOCKIMAGE; /* a 3-D array of coefficient blocks */
82
typedef JCOEF FAR *JCOEFPTR; /* useful in a couple of places */
85
/* Types for JPEG compression parameters and working tables. */
88
/* DCT coefficient quantization tables. */
91
/* This array gives the coefficient quantizers in natural array order
92
* (not the zigzag order in which they are stored in a JPEG DQT marker).
93
* CAUTION: IJG versions prior to v6a kept this array in zigzag order.
95
UINT16 quantval[DCTSIZE2]; /* quantization step for each coefficient */
96
/* This field is used only during compression. It's initialized FALSE when
97
* the table is created, and set TRUE when it's been output to the file.
98
* You could suppress output of a table by setting this to TRUE.
99
* (See jpeg_suppress_tables for an example.)
101
boolean sent_table; /* TRUE when table has been output */
105
/* Huffman coding tables. */
108
/* These two fields directly represent the contents of a JPEG DHT marker */
109
UINT8 bits[17]; /* bits[k] = # of symbols with codes of */
110
/* length k bits; bits[0] is unused */
111
UINT8 huffval[256]; /* The symbols, in order of incr code length */
112
/* This field is used only during compression. It's initialized FALSE when
113
* the table is created, and set TRUE when it's been output to the file.
114
* You could suppress output of a table by setting this to TRUE.
115
* (See jpeg_suppress_tables for an example.)
117
boolean sent_table; /* TRUE when table has been output */
121
/* Basic info about one component (color channel). */
124
/* These values are fixed over the whole image. */
125
/* For compression, they must be supplied by parameter setup; */
126
/* for decompression, they are read from the SOF marker. */
127
int component_id; /* identifier for this component (0..255) */
128
int component_index; /* its index in SOF or cinfo->comp_info[] */
129
int h_samp_factor; /* horizontal sampling factor (1..4) */
130
int v_samp_factor; /* vertical sampling factor (1..4) */
131
int quant_tbl_no; /* quantization table selector (0..3) */
132
/* These values may vary between scans. */
133
/* For compression, they must be supplied by parameter setup; */
134
/* for decompression, they are read from the SOS marker. */
135
/* The decompressor output side may not use these variables. */
136
int dc_tbl_no; /* DC entropy table selector (0..3) */
137
int ac_tbl_no; /* AC entropy table selector (0..3) */
139
/* Remaining fields should be treated as private by applications. */
141
/* These values are computed during compression or decompression startup: */
142
/* Component's size in DCT blocks.
143
* Any dummy blocks added to complete an MCU are not counted; therefore
144
* these values do not depend on whether a scan is interleaved or not.
146
JDIMENSION width_in_blocks;
147
JDIMENSION height_in_blocks;
148
/* Size of a DCT block in samples,
149
* reflecting any scaling we choose to apply during the DCT step.
150
* Values from 1 to 16 are supported.
151
* Note that different components may receive different DCT scalings.
153
int DCT_h_scaled_size;
154
int DCT_v_scaled_size;
155
/* The downsampled dimensions are the component's actual, unpadded number
156
* of samples at the main buffer (preprocessing/compression interface);
157
* DCT scaling is included, so
158
* downsampled_width = ceil(image_width * Hi/Hmax * DCT_h_scaled_size/DCTSIZE)
159
* and similarly for height.
161
JDIMENSION downsampled_width; /* actual width in samples */
162
JDIMENSION downsampled_height; /* actual height in samples */
163
/* This flag is used only for decompression. In cases where some of the
164
* components will be ignored (eg grayscale output from YCbCr image),
165
* we can skip most computations for the unused components.
167
boolean component_needed; /* do we need the value of this component? */
169
/* These values are computed before starting a scan of the component. */
170
/* The decompressor output side may not use these variables. */
171
int MCU_width; /* number of blocks per MCU, horizontally */
172
int MCU_height; /* number of blocks per MCU, vertically */
173
int MCU_blocks; /* MCU_width * MCU_height */
174
int MCU_sample_width; /* MCU width in samples: MCU_width * DCT_h_scaled_size */
175
int last_col_width; /* # of non-dummy blocks across in last MCU */
176
int last_row_height; /* # of non-dummy blocks down in last MCU */
178
/* Saved quantization table for component; NULL if none yet saved.
179
* See jdinput.c comments about the need for this information.
180
* This field is currently used only for decompression.
182
JQUANT_TBL * quant_table;
184
/* Private per-component storage for DCT or IDCT subsystem. */
186
} jpeg_component_info;
189
/* The script for encoding a multiple-scan file is an array of these: */
192
int comps_in_scan; /* number of components encoded in this scan */
193
int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */
194
int Ss, Se; /* progressive JPEG spectral selection parms */
195
int Ah, Al; /* progressive JPEG successive approx. parms */
198
/* The decompressor can save APPn and COM markers in a list of these: */
200
typedef struct jpeg_marker_struct FAR * jpeg_saved_marker_ptr;
202
struct jpeg_marker_struct {
203
jpeg_saved_marker_ptr next; /* next in list, or NULL */
204
UINT8 marker; /* marker code: JPEG_COM, or JPEG_APP0+n */
205
unsigned int original_length; /* # bytes of data in the file */
206
unsigned int data_length; /* # bytes of data saved at data[] */
207
JOCTET FAR * data; /* the data contained in the marker */
208
/* the marker length word is not counted in data_length or original_length */
211
/* Known color spaces. */
214
JCS_UNKNOWN, /* error/unspecified */
215
JCS_GRAYSCALE, /* monochrome */
216
JCS_RGB, /* red/green/blue */
217
JCS_YCbCr, /* Y/Cb/Cr (also known as YUV) */
218
JCS_CMYK, /* C/M/Y/K */
219
JCS_YCCK /* Y/Cb/Cr/K */
222
/* DCT/IDCT algorithm options. */
225
JDCT_ISLOW, /* slow but accurate integer algorithm */
226
JDCT_IFAST, /* faster, less accurate integer method */
227
JDCT_FLOAT /* floating-point: accurate, fast on fast HW */
230
#ifndef JDCT_DEFAULT /* may be overridden in jconfig.h */
231
#define JDCT_DEFAULT JDCT_ISLOW
233
#ifndef JDCT_FASTEST /* may be overridden in jconfig.h */
234
#define JDCT_FASTEST JDCT_IFAST
237
/* Dithering options for decompression. */
240
JDITHER_NONE, /* no dithering */
241
JDITHER_ORDERED, /* simple ordered dither */
242
JDITHER_FS /* Floyd-Steinberg error diffusion dither */
246
/* Common fields between JPEG compression and decompression master structs. */
248
#define jpeg_common_fields \
249
struct jpeg_error_mgr * err; /* Error handler module */\
250
struct jpeg_memory_mgr * mem; /* Memory manager module */\
251
struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\
252
void * client_data; /* Available for use by application */\
253
boolean is_decompressor; /* So common code can tell which is which */\
254
int global_state /* For checking call sequence validity */
256
/* Routines that are to be used by both halves of the library are declared
257
* to receive a pointer to this structure. There are no actual instances of
258
* jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct.
260
struct jpeg_common_struct {
261
jpeg_common_fields; /* Fields common to both master struct types */
262
/* Additional fields follow in an actual jpeg_compress_struct or
263
* jpeg_decompress_struct. All three structs must agree on these
264
* initial fields! (This would be a lot cleaner in C++.)
268
typedef struct jpeg_common_struct * j_common_ptr;
269
typedef struct jpeg_compress_struct * j_compress_ptr;
270
typedef struct jpeg_decompress_struct * j_decompress_ptr;
273
/* Master record for a compression instance */
275
struct jpeg_compress_struct {
276
jpeg_common_fields; /* Fields shared with jpeg_decompress_struct */
278
/* Destination for compressed data */
279
struct jpeg_destination_mgr * dest;
281
/* Description of source image --- these fields must be filled in by
282
* outer application before starting compression. in_color_space must
283
* be correct before you can even call jpeg_set_defaults().
286
JDIMENSION image_width; /* input image width */
287
JDIMENSION image_height; /* input image height */
288
int input_components; /* # of color components in input image */
289
J_COLOR_SPACE in_color_space; /* colorspace of input image */
291
double input_gamma; /* image gamma of input image */
293
/* Compression parameters --- these fields must be set before calling
294
* jpeg_start_compress(). We recommend calling jpeg_set_defaults() to
295
* initialize everything to reasonable defaults, then changing anything
296
* the application specifically wants to change. That way you won't get
297
* burnt when new parameters are added. Also note that there are several
298
* helper routines to simplify changing parameters.
301
unsigned int scale_num, scale_denom; /* fraction by which to scale image */
303
JDIMENSION jpeg_width; /* scaled JPEG image width */
304
JDIMENSION jpeg_height; /* scaled JPEG image height */
305
/* Dimensions of actual JPEG image that will be written to file,
306
* derived from input dimensions by scaling factors above.
307
* These fields are computed by jpeg_start_compress().
308
* You can also use jpeg_calc_jpeg_dimensions() to determine these values
309
* in advance of calling jpeg_start_compress().
312
int data_precision; /* bits of precision in image data */
314
int num_components; /* # of color components in JPEG image */
315
J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
317
jpeg_component_info * comp_info;
318
/* comp_info[i] describes component that appears i'th in SOF */
320
JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
321
int q_scale_factor[NUM_QUANT_TBLS];
322
/* ptrs to coefficient quantization tables, or NULL if not defined,
323
* and corresponding scale factors (percentage, initialized 100).
326
JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
327
JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
328
/* ptrs to Huffman coding tables, or NULL if not defined */
330
UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
331
UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
332
UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
334
int num_scans; /* # of entries in scan_info array */
335
const jpeg_scan_info * scan_info; /* script for multi-scan file, or NULL */
336
/* The default value of scan_info is NULL, which causes a single-scan
337
* sequential JPEG file to be emitted. To create a multi-scan file,
338
* set num_scans and scan_info to point to an array of scan definitions.
341
boolean raw_data_in; /* TRUE=caller supplies downsampled data */
342
boolean arith_code; /* TRUE=arithmetic coding, FALSE=Huffman */
343
boolean optimize_coding; /* TRUE=optimize entropy encoding parms */
344
boolean CCIR601_sampling; /* TRUE=first samples are cosited */
345
boolean do_fancy_downsampling; /* TRUE=apply fancy downsampling */
346
int smoothing_factor; /* 1..100, or 0 for no input smoothing */
347
J_DCT_METHOD dct_method; /* DCT algorithm selector */
349
/* The restart interval can be specified in absolute MCUs by setting
350
* restart_interval, or in MCU rows by setting restart_in_rows
351
* (in which case the correct restart_interval will be figured
354
unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */
355
int restart_in_rows; /* if > 0, MCU rows per restart interval */
357
/* Parameters controlling emission of special markers. */
359
boolean write_JFIF_header; /* should a JFIF marker be written? */
360
UINT8 JFIF_major_version; /* What to write for the JFIF version number */
361
UINT8 JFIF_minor_version;
362
/* These three values are not used by the JPEG code, merely copied */
363
/* into the JFIF APP0 marker. density_unit can be 0 for unknown, */
364
/* 1 for dots/inch, or 2 for dots/cm. Note that the pixel aspect */
365
/* ratio is defined by X_density/Y_density even when density_unit=0. */
366
UINT8 density_unit; /* JFIF code for pixel size units */
367
UINT16 X_density; /* Horizontal pixel density */
368
UINT16 Y_density; /* Vertical pixel density */
369
boolean write_Adobe_marker; /* should an Adobe marker be written? */
371
/* State variable: index of next scanline to be written to
372
* jpeg_write_scanlines(). Application may use this to control its
373
* processing loop, e.g., "while (next_scanline < image_height)".
376
JDIMENSION next_scanline; /* 0 .. image_height-1 */
378
/* Remaining fields are known throughout compressor, but generally
379
* should not be touched by a surrounding application.
383
* These fields are computed during compression startup
385
boolean progressive_mode; /* TRUE if scan script uses progressive mode */
386
int max_h_samp_factor; /* largest h_samp_factor */
387
int max_v_samp_factor; /* largest v_samp_factor */
389
int min_DCT_h_scaled_size; /* smallest DCT_h_scaled_size of any component */
390
int min_DCT_v_scaled_size; /* smallest DCT_v_scaled_size of any component */
392
JDIMENSION total_iMCU_rows; /* # of iMCU rows to be input to coef ctlr */
393
/* The coefficient controller receives data in units of MCU rows as defined
394
* for fully interleaved scans (whether the JPEG file is interleaved or not).
395
* There are v_samp_factor * DCTSIZE sample rows of each component in an
396
* "iMCU" (interleaved MCU) row.
400
* These fields are valid during any one scan.
401
* They describe the components and MCUs actually appearing in the scan.
403
int comps_in_scan; /* # of JPEG components in this scan */
404
jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
405
/* *cur_comp_info[i] describes component that appears i'th in SOS */
407
JDIMENSION MCUs_per_row; /* # of MCUs across the image */
408
JDIMENSION MCU_rows_in_scan; /* # of MCU rows in the image */
410
int blocks_in_MCU; /* # of DCT blocks per MCU */
411
int MCU_membership[C_MAX_BLOCKS_IN_MCU];
412
/* MCU_membership[i] is index in cur_comp_info of component owning */
413
/* i'th block in an MCU */
415
int Ss, Se, Ah, Al; /* progressive JPEG parameters for scan */
417
int block_size; /* the basic DCT block size: 1..16 */
418
const int * natural_order; /* natural-order position array */
419
int lim_Se; /* min( Se, DCTSIZE2-1 ) */
422
* Links to compression subobjects (methods and private variables of modules)
424
struct jpeg_comp_master * master;
425
struct jpeg_c_main_controller * main;
426
struct jpeg_c_prep_controller * prep;
427
struct jpeg_c_coef_controller * coef;
428
struct jpeg_marker_writer * marker;
429
struct jpeg_color_converter * cconvert;
430
struct jpeg_downsampler * downsample;
431
struct jpeg_forward_dct * fdct;
432
struct jpeg_entropy_encoder * entropy;
433
jpeg_scan_info * script_space; /* workspace for jpeg_simple_progression */
434
int script_space_size;
438
/* Master record for a decompression instance */
440
struct jpeg_decompress_struct {
441
jpeg_common_fields; /* Fields shared with jpeg_compress_struct */
443
/* Source of compressed data */
444
struct jpeg_source_mgr * src;
446
/* Basic description of image --- filled in by jpeg_read_header(). */
447
/* Application may inspect these values to decide how to process image. */
449
JDIMENSION image_width; /* nominal image width (from SOF marker) */
450
JDIMENSION image_height; /* nominal image height */
451
int num_components; /* # of color components in JPEG image */
452
J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
454
/* Decompression processing parameters --- these fields must be set before
455
* calling jpeg_start_decompress(). Note that jpeg_read_header() initializes
456
* them to default values.
459
J_COLOR_SPACE out_color_space; /* colorspace for output */
461
unsigned int scale_num, scale_denom; /* fraction by which to scale image */
463
double output_gamma; /* image gamma wanted in output */
465
boolean buffered_image; /* TRUE=multiple output passes */
466
boolean raw_data_out; /* TRUE=downsampled data wanted */
468
J_DCT_METHOD dct_method; /* IDCT algorithm selector */
469
boolean do_fancy_upsampling; /* TRUE=apply fancy upsampling */
470
boolean do_block_smoothing; /* TRUE=apply interblock smoothing */
472
boolean quantize_colors; /* TRUE=colormapped output wanted */
473
/* the following are ignored if not quantize_colors: */
474
J_DITHER_MODE dither_mode; /* type of color dithering to use */
475
boolean two_pass_quantize; /* TRUE=use two-pass color quantization */
476
int desired_number_of_colors; /* max # colors to use in created colormap */
477
/* these are significant only in buffered-image mode: */
478
boolean enable_1pass_quant; /* enable future use of 1-pass quantizer */
479
boolean enable_external_quant;/* enable future use of external colormap */
480
boolean enable_2pass_quant; /* enable future use of 2-pass quantizer */
482
/* Description of actual output image that will be returned to application.
483
* These fields are computed by jpeg_start_decompress().
484
* You can also use jpeg_calc_output_dimensions() to determine these values
485
* in advance of calling jpeg_start_decompress().
488
JDIMENSION output_width; /* scaled image width */
489
JDIMENSION output_height; /* scaled image height */
490
int out_color_components; /* # of color components in out_color_space */
491
int output_components; /* # of color components returned */
492
/* output_components is 1 (a colormap index) when quantizing colors;
493
* otherwise it equals out_color_components.
495
int rec_outbuf_height; /* min recommended height of scanline buffer */
496
/* If the buffer passed to jpeg_read_scanlines() is less than this many rows
497
* high, space and time will be wasted due to unnecessary data copying.
498
* Usually rec_outbuf_height will be 1 or 2, at most 4.
501
/* When quantizing colors, the output colormap is described by these fields.
502
* The application can supply a colormap by setting colormap non-NULL before
503
* calling jpeg_start_decompress; otherwise a colormap is created during
504
* jpeg_start_decompress or jpeg_start_output.
505
* The map has out_color_components rows and actual_number_of_colors columns.
507
int actual_number_of_colors; /* number of entries in use */
508
JSAMPARRAY colormap; /* The color map as a 2-D pixel array */
510
/* State variables: these variables indicate the progress of decompression.
511
* The application may examine these but must not modify them.
514
/* Row index of next scanline to be read from jpeg_read_scanlines().
515
* Application may use this to control its processing loop, e.g.,
516
* "while (output_scanline < output_height)".
518
JDIMENSION output_scanline; /* 0 .. output_height-1 */
520
/* Current input scan number and number of iMCU rows completed in scan.
521
* These indicate the progress of the decompressor input side.
523
int input_scan_number; /* Number of SOS markers seen so far */
524
JDIMENSION input_iMCU_row; /* Number of iMCU rows completed */
526
/* The "output scan number" is the notional scan being displayed by the
527
* output side. The decompressor will not allow output scan/row number
528
* to get ahead of input scan/row, but it can fall arbitrarily far behind.
530
int output_scan_number; /* Nominal scan number being displayed */
531
JDIMENSION output_iMCU_row; /* Number of iMCU rows read */
533
/* Current progression status. coef_bits[c][i] indicates the precision
534
* with which component c's DCT coefficient i (in zigzag order) is known.
535
* It is -1 when no data has yet been received, otherwise it is the point
536
* transform (shift) value for the most recent scan of the coefficient
537
* (thus, 0 at completion of the progression).
538
* This pointer is NULL when reading a non-progressive file.
540
int (*coef_bits)[DCTSIZE2]; /* -1 or current Al value for each coef */
542
/* Internal JPEG parameters --- the application usually need not look at
543
* these fields. Note that the decompressor output side may not use
544
* any parameters that can change between scans.
547
/* Quantization and Huffman tables are carried forward across input
548
* datastreams when processing abbreviated JPEG datastreams.
551
JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
552
/* ptrs to coefficient quantization tables, or NULL if not defined */
554
JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
555
JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
556
/* ptrs to Huffman coding tables, or NULL if not defined */
558
/* These parameters are never carried across datastreams, since they
559
* are given in SOF/SOS markers or defined to be reset by SOI.
562
int data_precision; /* bits of precision in image data */
564
jpeg_component_info * comp_info;
565
/* comp_info[i] describes component that appears i'th in SOF */
567
boolean is_baseline; /* TRUE if Baseline SOF0 encountered */
568
boolean progressive_mode; /* TRUE if SOFn specifies progressive mode */
569
boolean arith_code; /* TRUE=arithmetic coding, FALSE=Huffman */
571
UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
572
UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
573
UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
575
unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */
577
/* These fields record data obtained from optional markers recognized by
580
boolean saw_JFIF_marker; /* TRUE iff a JFIF APP0 marker was found */
581
/* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */
582
UINT8 JFIF_major_version; /* JFIF version number */
583
UINT8 JFIF_minor_version;
584
UINT8 density_unit; /* JFIF code for pixel size units */
585
UINT16 X_density; /* Horizontal pixel density */
586
UINT16 Y_density; /* Vertical pixel density */
587
boolean saw_Adobe_marker; /* TRUE iff an Adobe APP14 marker was found */
588
UINT8 Adobe_transform; /* Color transform code from Adobe marker */
590
boolean CCIR601_sampling; /* TRUE=first samples are cosited */
592
/* Aside from the specific data retained from APPn markers known to the
593
* library, the uninterpreted contents of any or all APPn and COM markers
594
* can be saved in a list for examination by the application.
596
jpeg_saved_marker_ptr marker_list; /* Head of list of saved markers */
598
/* Remaining fields are known throughout decompressor, but generally
599
* should not be touched by a surrounding application.
603
* These fields are computed during decompression startup
605
int max_h_samp_factor; /* largest h_samp_factor */
606
int max_v_samp_factor; /* largest v_samp_factor */
608
int min_DCT_h_scaled_size; /* smallest DCT_h_scaled_size of any component */
609
int min_DCT_v_scaled_size; /* smallest DCT_v_scaled_size of any component */
611
JDIMENSION total_iMCU_rows; /* # of iMCU rows in image */
612
/* The coefficient controller's input and output progress is measured in
613
* units of "iMCU" (interleaved MCU) rows. These are the same as MCU rows
614
* in fully interleaved JPEG scans, but are used whether the scan is
615
* interleaved or not. We define an iMCU row as v_samp_factor DCT block
616
* rows of each component. Therefore, the IDCT output contains
617
* v_samp_factor*DCT_v_scaled_size sample rows of a component per iMCU row.
620
JSAMPLE * sample_range_limit; /* table for fast range-limiting */
623
* These fields are valid during any one scan.
624
* They describe the components and MCUs actually appearing in the scan.
625
* Note that the decompressor output side must not use these fields.
627
int comps_in_scan; /* # of JPEG components in this scan */
628
jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
629
/* *cur_comp_info[i] describes component that appears i'th in SOS */
631
JDIMENSION MCUs_per_row; /* # of MCUs across the image */
632
JDIMENSION MCU_rows_in_scan; /* # of MCU rows in the image */
634
int blocks_in_MCU; /* # of DCT blocks per MCU */
635
int MCU_membership[D_MAX_BLOCKS_IN_MCU];
636
/* MCU_membership[i] is index in cur_comp_info of component owning */
637
/* i'th block in an MCU */
639
int Ss, Se, Ah, Al; /* progressive JPEG parameters for scan */
641
/* These fields are derived from Se of first SOS marker.
643
int block_size; /* the basic DCT block size: 1..16 */
644
const int * natural_order; /* natural-order position array for entropy decode */
645
int lim_Se; /* min( Se, DCTSIZE2-1 ) for entropy decode */
647
/* This field is shared between entropy decoder and marker parser.
648
* It is either zero or the code of a JPEG marker that has been
649
* read from the data source, but has not yet been processed.
654
* Links to decompression subobjects (methods, private variables of modules)
656
struct jpeg_decomp_master * master;
657
struct jpeg_d_main_controller * main;
658
struct jpeg_d_coef_controller * coef;
659
struct jpeg_d_post_controller * post;
660
struct jpeg_input_controller * inputctl;
661
struct jpeg_marker_reader * marker;
662
struct jpeg_entropy_decoder * entropy;
663
struct jpeg_inverse_dct * idct;
664
struct jpeg_upsampler * upsample;
665
struct jpeg_color_deconverter * cconvert;
666
struct jpeg_color_quantizer * cquantize;
670
/* "Object" declarations for JPEG modules that may be supplied or called
671
* directly by the surrounding application.
672
* As with all objects in the JPEG library, these structs only define the
673
* publicly visible methods and state variables of a module. Additional
674
* private fields may exist after the public ones.
678
/* Error handler object */
680
struct jpeg_error_mgr {
681
/* Error exit handler: does not return to caller */
682
JMETHOD(void, error_exit, (j_common_ptr cinfo));
683
/* Conditionally emit a trace or warning message */
684
JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level));
685
/* Routine that actually outputs a trace or error message */
686
JMETHOD(void, output_message, (j_common_ptr cinfo));
687
/* Format a message string for the most recent JPEG error or message */
688
JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer));
689
#define JMSG_LENGTH_MAX 200 /* recommended size of format_message buffer */
690
/* Reset error state variables at start of a new image */
691
JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo));
693
/* The message ID code and any parameters are saved here.
694
* A message can have one string parameter or up to 8 int parameters.
697
#define JMSG_STR_PARM_MAX 80
700
char s[JMSG_STR_PARM_MAX];
703
/* Standard state variables for error facility */
705
int trace_level; /* max msg_level that will be displayed */
707
/* For recoverable corrupt-data errors, we emit a warning message,
708
* but keep going unless emit_message chooses to abort. emit_message
709
* should count warnings in num_warnings. The surrounding application
710
* can check for bad data by seeing if num_warnings is nonzero at the
713
long num_warnings; /* number of corrupt-data warnings */
715
/* These fields point to the table(s) of error message strings.
716
* An application can change the table pointer to switch to a different
717
* message list (typically, to change the language in which errors are
718
* reported). Some applications may wish to add additional error codes
719
* that will be handled by the JPEG library error mechanism; the second
720
* table pointer is used for this purpose.
722
* First table includes all errors generated by JPEG library itself.
723
* Error code 0 is reserved for a "no such error string" message.
725
const char * const * jpeg_message_table; /* Library errors */
726
int last_jpeg_message; /* Table contains strings 0..last_jpeg_message */
727
/* Second table can be added by application (see cjpeg/djpeg for example).
728
* It contains strings numbered first_addon_message..last_addon_message.
730
const char * const * addon_message_table; /* Non-library errors */
731
int first_addon_message; /* code for first string in addon table */
732
int last_addon_message; /* code for last string in addon table */
736
/* Progress monitor object */
738
struct jpeg_progress_mgr {
739
JMETHOD(void, progress_monitor, (j_common_ptr cinfo));
741
long pass_counter; /* work units completed in this pass */
742
long pass_limit; /* total number of work units in this pass */
743
int completed_passes; /* passes completed so far */
744
int total_passes; /* total number of passes expected */
748
/* Data destination object for compression */
750
struct jpeg_destination_mgr {
751
JOCTET * next_output_byte; /* => next byte to write in buffer */
752
size_t free_in_buffer; /* # of byte spaces remaining in buffer */
754
JMETHOD(void, init_destination, (j_compress_ptr cinfo));
755
JMETHOD(boolean, empty_output_buffer, (j_compress_ptr cinfo));
756
JMETHOD(void, term_destination, (j_compress_ptr cinfo));
760
/* Data source object for decompression */
762
struct jpeg_source_mgr {
763
const JOCTET * next_input_byte; /* => next byte to read from buffer */
764
size_t bytes_in_buffer; /* # of bytes remaining in buffer */
766
JMETHOD(void, init_source, (j_decompress_ptr cinfo));
767
JMETHOD(boolean, fill_input_buffer, (j_decompress_ptr cinfo));
768
JMETHOD(void, skip_input_data, (j_decompress_ptr cinfo, long num_bytes));
769
JMETHOD(boolean, resync_to_restart, (j_decompress_ptr cinfo, int desired));
770
JMETHOD(void, term_source, (j_decompress_ptr cinfo));
774
/* Memory manager object.
775
* Allocates "small" objects (a few K total), "large" objects (tens of K),
776
* and "really big" objects (virtual arrays with backing store if needed).
777
* The memory manager does not allow individual objects to be freed; rather,
778
* each created object is assigned to a pool, and whole pools can be freed
779
* at once. This is faster and more convenient than remembering exactly what
780
* to free, especially where malloc()/free() are not too speedy.
781
* NB: alloc routines never return NULL. They exit to error_exit if not
785
#define JPOOL_PERMANENT 0 /* lasts until master record is destroyed */
786
#define JPOOL_IMAGE 1 /* lasts until done with image/datastream */
787
#define JPOOL_NUMPOOLS 2
789
typedef struct jvirt_sarray_control * jvirt_sarray_ptr;
790
typedef struct jvirt_barray_control * jvirt_barray_ptr;
793
struct jpeg_memory_mgr {
794
/* Method pointers */
795
JMETHOD(void *, alloc_small, (j_common_ptr cinfo, int pool_id,
796
size_t sizeofobject));
797
JMETHOD(void FAR *, alloc_large, (j_common_ptr cinfo, int pool_id,
798
size_t sizeofobject));
799
JMETHOD(JSAMPARRAY, alloc_sarray, (j_common_ptr cinfo, int pool_id,
800
JDIMENSION samplesperrow,
801
JDIMENSION numrows));
802
JMETHOD(JBLOCKARRAY, alloc_barray, (j_common_ptr cinfo, int pool_id,
803
JDIMENSION blocksperrow,
804
JDIMENSION numrows));
805
JMETHOD(jvirt_sarray_ptr, request_virt_sarray, (j_common_ptr cinfo,
808
JDIMENSION samplesperrow,
810
JDIMENSION maxaccess));
811
JMETHOD(jvirt_barray_ptr, request_virt_barray, (j_common_ptr cinfo,
814
JDIMENSION blocksperrow,
816
JDIMENSION maxaccess));
817
JMETHOD(void, realize_virt_arrays, (j_common_ptr cinfo));
818
JMETHOD(JSAMPARRAY, access_virt_sarray, (j_common_ptr cinfo,
819
jvirt_sarray_ptr ptr,
820
JDIMENSION start_row,
823
JMETHOD(JBLOCKARRAY, access_virt_barray, (j_common_ptr cinfo,
824
jvirt_barray_ptr ptr,
825
JDIMENSION start_row,
828
JMETHOD(void, free_pool, (j_common_ptr cinfo, int pool_id));
829
JMETHOD(void, self_destruct, (j_common_ptr cinfo));
831
/* Limit on memory allocation for this JPEG object. (Note that this is
832
* merely advisory, not a guaranteed maximum; it only affects the space
833
* used for virtual-array buffers.) May be changed by outer application
834
* after creating the JPEG object.
836
long max_memory_to_use;
838
/* Maximum allocation request accepted by alloc_large. */
839
long max_alloc_chunk;
843
/* Routine signature for application-supplied marker processing methods.
844
* Need not pass marker code since it is stored in cinfo->unread_marker.
846
typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
849
/* Declarations for routines called by application.
850
* The JPP macro hides prototype parameters from compilers that can't cope.
851
* Note JPP requires double parentheses.
854
#ifdef HAVE_PROTOTYPES
855
#define JPP(arglist) arglist
857
#define JPP(arglist) ()
861
/* Short forms of external names for systems with brain-damaged linkers.
862
* We shorten external names to be unique in the first six letters, which
863
* is good enough for all known systems.
864
* (If your compiler itself needs names to be unique in less than 15
865
* characters, you are out of luck. Get a better compiler.)
868
#ifdef NEED_SHORT_EXTERNAL_NAMES
869
#define jpeg_std_error jStdError
870
#define jpeg_CreateCompress jCreaCompress
871
#define jpeg_CreateDecompress jCreaDecompress
872
#define jpeg_destroy_compress jDestCompress
873
#define jpeg_destroy_decompress jDestDecompress
874
#define jpeg_stdio_dest jStdDest
875
#define jpeg_stdio_src jStdSrc
876
#define jpeg_mem_dest jMemDest
877
#define jpeg_mem_src jMemSrc
878
#define jpeg_set_defaults jSetDefaults
879
#define jpeg_set_colorspace jSetColorspace
880
#define jpeg_default_colorspace jDefColorspace
881
#define jpeg_set_quality jSetQuality
882
#define jpeg_set_linear_quality jSetLQuality
883
#define jpeg_default_qtables jDefQTables
884
#define jpeg_add_quant_table jAddQuantTable
885
#define jpeg_quality_scaling jQualityScaling
886
#define jpeg_simple_progression jSimProgress
887
#define jpeg_suppress_tables jSuppressTables
888
#define jpeg_alloc_quant_table jAlcQTable
889
#define jpeg_alloc_huff_table jAlcHTable
890
#define jpeg_start_compress jStrtCompress
891
#define jpeg_write_scanlines jWrtScanlines
892
#define jpeg_finish_compress jFinCompress
893
#define jpeg_calc_jpeg_dimensions jCjpegDimensions
894
#define jpeg_write_raw_data jWrtRawData
895
#define jpeg_write_marker jWrtMarker
896
#define jpeg_write_m_header jWrtMHeader
897
#define jpeg_write_m_byte jWrtMByte
898
#define jpeg_write_tables jWrtTables
899
#define jpeg_read_header jReadHeader
900
#define jpeg_start_decompress jStrtDecompress
901
#define jpeg_read_scanlines jReadScanlines
902
#define jpeg_finish_decompress jFinDecompress
903
#define jpeg_read_raw_data jReadRawData
904
#define jpeg_has_multiple_scans jHasMultScn
905
#define jpeg_start_output jStrtOutput
906
#define jpeg_finish_output jFinOutput
907
#define jpeg_input_complete jInComplete
908
#define jpeg_new_colormap jNewCMap
909
#define jpeg_consume_input jConsumeInput
910
#define jpeg_core_output_dimensions jCoreDimensions
911
#define jpeg_calc_output_dimensions jCalcDimensions
912
#define jpeg_save_markers jSaveMarkers
913
#define jpeg_set_marker_processor jSetMarker
914
#define jpeg_read_coefficients jReadCoefs
915
#define jpeg_write_coefficients jWrtCoefs
916
#define jpeg_copy_critical_parameters jCopyCrit
917
#define jpeg_abort_compress jAbrtCompress
918
#define jpeg_abort_decompress jAbrtDecompress
919
#define jpeg_abort jAbort
920
#define jpeg_destroy jDestroy
921
#define jpeg_resync_to_restart jResyncRestart
922
#endif /* NEED_SHORT_EXTERNAL_NAMES */
925
/* Default error-management setup */
926
EXTERN(struct jpeg_error_mgr *) jpeg_std_error
927
JPP((struct jpeg_error_mgr * err));
929
/* Initialization of JPEG compression objects.
930
* jpeg_create_compress() and jpeg_create_decompress() are the exported
931
* names that applications should call. These expand to calls on
932
* jpeg_CreateCompress and jpeg_CreateDecompress with additional information
933
* passed for version mismatch checking.
934
* NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
936
#define jpeg_create_compress(cinfo) \
937
jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
938
(size_t) sizeof(struct jpeg_compress_struct))
939
#define jpeg_create_decompress(cinfo) \
940
jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
941
(size_t) sizeof(struct jpeg_decompress_struct))
942
EXTERN(void) jpeg_CreateCompress JPP((j_compress_ptr cinfo,
943
int version, size_t structsize));
944
EXTERN(void) jpeg_CreateDecompress JPP((j_decompress_ptr cinfo,
945
int version, size_t structsize));
946
/* Destruction of JPEG compression objects */
947
EXTERN(void) jpeg_destroy_compress JPP((j_compress_ptr cinfo));
948
EXTERN(void) jpeg_destroy_decompress JPP((j_decompress_ptr cinfo));
950
/* Standard data source and destination managers: stdio streams. */
951
/* Caller is responsible for opening the file before and closing after. */
952
EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
953
EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, FILE * infile));
955
/* Data source and destination managers: memory buffers. */
956
EXTERN(void) jpeg_mem_dest JPP((j_compress_ptr cinfo,
957
unsigned char ** outbuffer,
958
unsigned long * outsize));
959
EXTERN(void) jpeg_mem_src JPP((j_decompress_ptr cinfo,
960
unsigned char * inbuffer,
961
unsigned long insize));
963
/* Default parameter setup for compression */
964
EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
965
/* Compression parameter setup aids */
966
EXTERN(void) jpeg_set_colorspace JPP((j_compress_ptr cinfo,
967
J_COLOR_SPACE colorspace));
968
EXTERN(void) jpeg_default_colorspace JPP((j_compress_ptr cinfo));
969
EXTERN(void) jpeg_set_quality JPP((j_compress_ptr cinfo, int quality,
970
boolean force_baseline));
971
EXTERN(void) jpeg_set_linear_quality JPP((j_compress_ptr cinfo,
973
boolean force_baseline));
974
EXTERN(void) jpeg_default_qtables JPP((j_compress_ptr cinfo,
975
boolean force_baseline));
976
EXTERN(void) jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl,
977
const unsigned int *basic_table,
979
boolean force_baseline));
980
EXTERN(int) jpeg_quality_scaling JPP((int quality));
981
EXTERN(void) jpeg_simple_progression JPP((j_compress_ptr cinfo));
982
EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo,
984
EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
985
EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
987
/* Main entry points for compression */
988
EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo,
989
boolean write_all_tables));
990
EXTERN(JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo,
991
JSAMPARRAY scanlines,
992
JDIMENSION num_lines));
993
EXTERN(void) jpeg_finish_compress JPP((j_compress_ptr cinfo));
995
/* Precalculate JPEG dimensions for current compression parameters. */
996
EXTERN(void) jpeg_calc_jpeg_dimensions JPP((j_compress_ptr cinfo));
998
/* Replaces jpeg_write_scanlines when writing raw downsampled data. */
999
EXTERN(JDIMENSION) jpeg_write_raw_data JPP((j_compress_ptr cinfo,
1001
JDIMENSION num_lines));
1003
/* Write a special marker. See libjpeg.txt concerning safe usage. */
1004
EXTERN(void) jpeg_write_marker
1005
JPP((j_compress_ptr cinfo, int marker,
1006
const JOCTET * dataptr, unsigned int datalen));
1007
/* Same, but piecemeal. */
1008
EXTERN(void) jpeg_write_m_header
1009
JPP((j_compress_ptr cinfo, int marker, unsigned int datalen));
1010
EXTERN(void) jpeg_write_m_byte
1011
JPP((j_compress_ptr cinfo, int val));
1013
/* Alternate compression function: just write an abbreviated table file */
1014
EXTERN(void) jpeg_write_tables JPP((j_compress_ptr cinfo));
1016
/* Decompression startup: read start of JPEG datastream to see what's there */
1017
EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
1018
boolean require_image));
1019
/* Return value is one of: */
1020
#define JPEG_SUSPENDED 0 /* Suspended due to lack of input data */
1021
#define JPEG_HEADER_OK 1 /* Found valid image datastream */
1022
#define JPEG_HEADER_TABLES_ONLY 2 /* Found valid table-specs-only datastream */
1023
/* If you pass require_image = TRUE (normal case), you need not check for
1024
* a TABLES_ONLY return code; an abbreviated file will cause an error exit.
1025
* JPEG_SUSPENDED is only possible if you use a data source module that can
1026
* give a suspension return (the stdio source module doesn't).
1029
/* Main entry points for decompression */
1030
EXTERN(boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo));
1031
EXTERN(JDIMENSION) jpeg_read_scanlines JPP((j_decompress_ptr cinfo,
1032
JSAMPARRAY scanlines,
1033
JDIMENSION max_lines));
1034
EXTERN(boolean) jpeg_finish_decompress JPP((j_decompress_ptr cinfo));
1036
/* Replaces jpeg_read_scanlines when reading raw downsampled data. */
1037
EXTERN(JDIMENSION) jpeg_read_raw_data JPP((j_decompress_ptr cinfo,
1039
JDIMENSION max_lines));
1041
/* Additional entry points for buffered-image mode. */
1042
EXTERN(boolean) jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo));
1043
EXTERN(boolean) jpeg_start_output JPP((j_decompress_ptr cinfo,
1045
EXTERN(boolean) jpeg_finish_output JPP((j_decompress_ptr cinfo));
1046
EXTERN(boolean) jpeg_input_complete JPP((j_decompress_ptr cinfo));
1047
EXTERN(void) jpeg_new_colormap JPP((j_decompress_ptr cinfo));
1048
EXTERN(int) jpeg_consume_input JPP((j_decompress_ptr cinfo));
1049
/* Return value is one of: */
1050
/* #define JPEG_SUSPENDED 0 Suspended due to lack of input data */
1051
#define JPEG_REACHED_SOS 1 /* Reached start of new scan */
1052
#define JPEG_REACHED_EOI 2 /* Reached end of image */
1053
#define JPEG_ROW_COMPLETED 3 /* Completed one iMCU row */
1054
#define JPEG_SCAN_COMPLETED 4 /* Completed last iMCU row of a scan */
1056
/* Precalculate output dimensions for current decompression parameters. */
1057
EXTERN(void) jpeg_core_output_dimensions JPP((j_decompress_ptr cinfo));
1058
EXTERN(void) jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo));
1060
/* Control saving of COM and APPn markers into marker_list. */
1061
EXTERN(void) jpeg_save_markers
1062
JPP((j_decompress_ptr cinfo, int marker_code,
1063
unsigned int length_limit));
1065
/* Install a special processing method for COM or APPn markers. */
1066
EXTERN(void) jpeg_set_marker_processor
1067
JPP((j_decompress_ptr cinfo, int marker_code,
1068
jpeg_marker_parser_method routine));
1070
/* Read or write raw DCT coefficients --- useful for lossless transcoding. */
1071
EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo));
1072
EXTERN(void) jpeg_write_coefficients JPP((j_compress_ptr cinfo,
1073
jvirt_barray_ptr * coef_arrays));
1074
EXTERN(void) jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
1075
j_compress_ptr dstinfo));
1077
/* If you choose to abort compression or decompression before completing
1078
* jpeg_finish_(de)compress, then you need to clean up to release memory,
1079
* temporary files, etc. You can just call jpeg_destroy_(de)compress
1080
* if you're done with the JPEG object, but if you want to clean it up and
1081
* reuse it, call this:
1083
EXTERN(void) jpeg_abort_compress JPP((j_compress_ptr cinfo));
1084
EXTERN(void) jpeg_abort_decompress JPP((j_decompress_ptr cinfo));
1086
/* Generic versions of jpeg_abort and jpeg_destroy that work on either
1087
* flavor of JPEG object. These may be more convenient in some places.
1089
EXTERN(void) jpeg_abort JPP((j_common_ptr cinfo));
1090
EXTERN(void) jpeg_destroy JPP((j_common_ptr cinfo));
1092
/* Default restart-marker-resync procedure for use by data source modules */
1093
EXTERN(boolean) jpeg_resync_to_restart JPP((j_decompress_ptr cinfo,
1097
/* These marker codes are exported since applications and data source modules
1098
* are likely to want to use them.
1101
#define JPEG_RST0 0xD0 /* RST0 marker code */
1102
#define JPEG_EOI 0xD9 /* EOI marker code */
1103
#define JPEG_APP0 0xE0 /* APP0 marker code */
1104
#define JPEG_COM 0xFE /* COM marker code */
1107
/* If we have a brain-damaged compiler that emits warnings (or worse, errors)
1108
* for structure definitions that are never filled in, keep it quiet by
1109
* supplying dummy definitions for the various substructures.
1112
#ifdef INCOMPLETE_TYPES_BROKEN
1113
#ifndef JPEG_INTERNALS /* will be defined in jpegint.h */
1114
struct jvirt_sarray_control { long dummy; };
1115
struct jvirt_barray_control { long dummy; };
1116
struct jpeg_comp_master { long dummy; };
1117
struct jpeg_c_main_controller { long dummy; };
1118
struct jpeg_c_prep_controller { long dummy; };
1119
struct jpeg_c_coef_controller { long dummy; };
1120
struct jpeg_marker_writer { long dummy; };
1121
struct jpeg_color_converter { long dummy; };
1122
struct jpeg_downsampler { long dummy; };
1123
struct jpeg_forward_dct { long dummy; };
1124
struct jpeg_entropy_encoder { long dummy; };
1125
struct jpeg_decomp_master { long dummy; };
1126
struct jpeg_d_main_controller { long dummy; };
1127
struct jpeg_d_coef_controller { long dummy; };
1128
struct jpeg_d_post_controller { long dummy; };
1129
struct jpeg_input_controller { long dummy; };
1130
struct jpeg_marker_reader { long dummy; };
1131
struct jpeg_entropy_decoder { long dummy; };
1132
struct jpeg_inverse_dct { long dummy; };
1133
struct jpeg_upsampler { long dummy; };
1134
struct jpeg_color_deconverter { long dummy; };
1135
struct jpeg_color_quantizer { long dummy; };
1136
#endif /* JPEG_INTERNALS */
1137
#endif /* INCOMPLETE_TYPES_BROKEN */
1141
* The JPEG library modules define JPEG_INTERNALS before including this file.
1142
* The internal structure declarations are read only when that is true.
1143
* Applications using the library should not include jpegint.h, but may wish
1144
* to include jerror.h.
1147
#ifdef JPEG_INTERNALS
1148
#include "jpegint.h" /* fetch private declarations */
1149
#include "jerror.h" /* fetch error codes too */
1153
#ifndef DONT_USE_EXTERN_C
1158
#endif /* JPEGLIB_H */
added
removed
source/Irrlicht/jpeglib/jpeglib.h
