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src/share/native/sun/awt/image/jpeg/jpeglib.h@badfd40f15ac
src/share/native/sun/awt/image/jpeg/jpeglib.h
Fri, 11 Sep 2020 16:12:45 +0000
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- prr
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- Fri, 11 Sep 2020 16:12:45 +0000
- changeset 14221
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8253019: Enhanced JPEG decoding
Reviewed-by: rhalade, mschoene, serb, psadhukhan
1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 /*
6 * jpeglib.h
7 *
8 * Copyright (C) 1991-1998, Thomas G. Lane.
9 * This file is part of the Independent JPEG Group's software.
10 * For conditions of distribution and use, see the accompanying README file.
11 *
12 * This file defines the application interface for the JPEG library.
13 * Most applications using the library need only include this file,
14 * and perhaps jerror.h if they want to know the exact error codes.
15 */
17 #ifndef JPEGLIB_H
18 #define JPEGLIB_H
20 /*
21 * First we include the configuration files that record how this
22 * installation of the JPEG library is set up. jconfig.h can be
23 * generated automatically for many systems. jmorecfg.h contains
24 * manual configuration options that most people need not worry about.
25 */
27 #ifndef JCONFIG_INCLUDED /* in case jinclude.h already did */
28 #include "jconfig.h" /* widely used configuration options */
29 #endif
30 #include "jmorecfg.h" /* seldom changed options */
33 /* Version ID for the JPEG library.
34 * Might be useful for tests like "#if JPEG_LIB_VERSION >= 60".
35 */
37 #define JPEG_LIB_VERSION 62 /* Version 6b */
40 /* Various constants determining the sizes of things.
41 * All of these are specified by the JPEG standard, so don't change them
42 * if you want to be compatible.
43 */
45 #define DCTSIZE 8 /* The basic DCT block is 8x8 samples */
46 #define DCTSIZE2 64 /* DCTSIZE squared; # of elements in a block */
47 #define NUM_QUANT_TBLS 4 /* Quantization tables are numbered 0..3 */
48 #define NUM_HUFF_TBLS 4 /* Huffman tables are numbered 0..3 */
49 #define NUM_ARITH_TBLS 16 /* Arith-coding tables are numbered 0..15 */
50 #define MAX_COMPS_IN_SCAN 4 /* JPEG limit on # of components in one scan */
51 #define MAX_SAMP_FACTOR 4 /* JPEG limit on sampling factors */
52 /* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard;
53 * the PostScript DCT filter can emit files with many more than 10 blocks/MCU.
54 * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU
55 * to handle it. We even let you do this from the jconfig.h file. However,
56 * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe
57 * sometimes emits noncompliant files doesn't mean you should too.
58 */
59 #define C_MAX_BLOCKS_IN_MCU 10 /* compressor's limit on blocks per MCU */
60 #ifndef D_MAX_BLOCKS_IN_MCU
61 #define D_MAX_BLOCKS_IN_MCU 10 /* decompressor's limit on blocks per MCU */
62 #endif
65 /* Data structures for images (arrays of samples and of DCT coefficients).
66 * On 80x86 machines, the image arrays are too big for near pointers,
67 * but the pointer arrays can fit in near memory.
68 */
70 typedef JSAMPLE FAR *JSAMPROW; /* ptr to one image row of pixel samples. */
71 typedef JSAMPROW *JSAMPARRAY; /* ptr to some rows (a 2-D sample array) */
72 typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */
74 typedef JCOEF JBLOCK[DCTSIZE2]; /* one block of coefficients */
75 typedef JBLOCK FAR *JBLOCKROW; /* pointer to one row of coefficient blocks */
76 typedef JBLOCKROW *JBLOCKARRAY; /* a 2-D array of coefficient blocks */
77 typedef JBLOCKARRAY *JBLOCKIMAGE; /* a 3-D array of coefficient blocks */
79 typedef JCOEF FAR *JCOEFPTR; /* useful in a couple of places */
82 /* Types for JPEG compression parameters and working tables. */
85 /* DCT coefficient quantization tables. */
87 typedef struct {
88 /* This array gives the coefficient quantizers in natural array order
89 * (not the zigzag order in which they are stored in a JPEG DQT marker).
90 * CAUTION: IJG versions prior to v6a kept this array in zigzag order.
91 */
92 UINT16 quantval[DCTSIZE2]; /* quantization step for each coefficient */
93 /* This field is used only during compression. It's initialized FALSE when
94 * the table is created, and set TRUE when it's been output to the file.
95 * You could suppress output of a table by setting this to TRUE.
96 * (See jpeg_suppress_tables for an example.)
97 */
98 boolean sent_table; /* TRUE when table has been output */
99 } JQUANT_TBL;
102 /* Huffman coding tables. */
104 typedef struct {
105 /* These two fields directly represent the contents of a JPEG DHT marker */
106 UINT8 bits[17]; /* bits[k] = # of symbols with codes of */
107 /* length k bits; bits[0] is unused */
108 UINT8 huffval[256]; /* The symbols, in order of incr code length */
109 /* This field is used only during compression. It's initialized FALSE when
110 * the table is created, and set TRUE when it's been output to the file.
111 * You could suppress output of a table by setting this to TRUE.
112 * (See jpeg_suppress_tables for an example.)
113 */
114 boolean sent_table; /* TRUE when table has been output */
115 } JHUFF_TBL;
118 /* Basic info about one component (color channel). */
120 typedef struct {
121 /* These values are fixed over the whole image. */
122 /* For compression, they must be supplied by parameter setup; */
123 /* for decompression, they are read from the SOF marker. */
124 int component_id; /* identifier for this component (0..255) */
125 int component_index; /* its index in SOF or cinfo->comp_info[] */
126 int h_samp_factor; /* horizontal sampling factor (1..4) */
127 int v_samp_factor; /* vertical sampling factor (1..4) */
128 int quant_tbl_no; /* quantization table selector (0..3) */
129 /* These values may vary between scans. */
130 /* For compression, they must be supplied by parameter setup; */
131 /* for decompression, they are read from the SOS marker. */
132 /* The decompressor output side may not use these variables. */
133 int dc_tbl_no; /* DC entropy table selector (0..3) */
134 int ac_tbl_no; /* AC entropy table selector (0..3) */
136 /* Remaining fields should be treated as private by applications. */
138 /* These values are computed during compression or decompression startup: */
139 /* Component's size in DCT blocks.
140 * Any dummy blocks added to complete an MCU are not counted; therefore
141 * these values do not depend on whether a scan is interleaved or not.
142 */
143 JDIMENSION width_in_blocks;
144 JDIMENSION height_in_blocks;
145 /* Size of a DCT block in samples. Always DCTSIZE for compression.
146 * For decompression this is the size of the output from one DCT block,
147 * reflecting any scaling we choose to apply during the IDCT step.
148 * Values of 1,2,4,8 are likely to be supported. Note that different
149 * components may receive different IDCT scalings.
150 */
151 int DCT_scaled_size;
152 /* The downsampled dimensions are the component's actual, unpadded number
153 * of samples at the main buffer (preprocessing/compression interface), thus
154 * downsampled_width = ceil(image_width * Hi/Hmax)
155 * and similarly for height. For decompression, IDCT scaling is included, so
156 * downsampled_width = ceil(image_width * Hi/Hmax * DCT_scaled_size/DCTSIZE)
157 */
158 JDIMENSION downsampled_width; /* actual width in samples */
159 JDIMENSION downsampled_height; /* actual height in samples */
160 /* This flag is used only for decompression. In cases where some of the
161 * components will be ignored (eg grayscale output from YCbCr image),
162 * we can skip most computations for the unused components.
163 */
164 boolean component_needed; /* do we need the value of this component? */
166 /* These values are computed before starting a scan of the component. */
167 /* The decompressor output side may not use these variables. */
168 int MCU_width; /* number of blocks per MCU, horizontally */
169 int MCU_height; /* number of blocks per MCU, vertically */
170 int MCU_blocks; /* MCU_width * MCU_height */
171 int MCU_sample_width; /* MCU width in samples, MCU_width*DCT_scaled_size */
172 int last_col_width; /* # of non-dummy blocks across in last MCU */
173 int last_row_height; /* # of non-dummy blocks down in last MCU */
175 /* Saved quantization table for component; NULL if none yet saved.
176 * See jdinput.c comments about the need for this information.
177 * This field is currently used only for decompression.
178 */
179 JQUANT_TBL * quant_table;
181 /* Private per-component storage for DCT or IDCT subsystem. */
182 void * dct_table;
183 } jpeg_component_info;
186 /* The script for encoding a multiple-scan file is an array of these: */
188 typedef struct {
189 int comps_in_scan; /* number of components encoded in this scan */
190 int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */
191 int Ss, Se; /* progressive JPEG spectral selection parms */
192 int Ah, Al; /* progressive JPEG successive approx. parms */
193 } jpeg_scan_info;
195 /* The decompressor can save APPn and COM markers in a list of these: */
197 typedef struct jpeg_marker_struct FAR * jpeg_saved_marker_ptr;
199 struct jpeg_marker_struct {
200 jpeg_saved_marker_ptr next; /* next in list, or NULL */
201 UINT8 marker; /* marker code: JPEG_COM, or JPEG_APP0+n */
202 unsigned int original_length; /* # bytes of data in the file */
203 unsigned int data_length; /* # bytes of data saved at data[] */
204 JOCTET FAR * data; /* the data contained in the marker */
205 /* the marker length word is not counted in data_length or original_length */
206 };
208 /* Known color spaces. */
210 typedef enum {
211 JCS_UNKNOWN, /* error/unspecified */
212 JCS_GRAYSCALE, /* monochrome */
213 JCS_RGB, /* red/green/blue */
214 JCS_YCbCr, /* Y/Cb/Cr (also known as YUV) */
215 JCS_CMYK, /* C/M/Y/K */
216 JCS_YCCK /* Y/Cb/Cr/K */
217 } J_COLOR_SPACE;
219 /* DCT/IDCT algorithm options. */
221 typedef enum {
222 JDCT_ISLOW, /* slow but accurate integer algorithm */
223 JDCT_IFAST, /* faster, less accurate integer method */
224 JDCT_FLOAT /* floating-point: accurate, fast on fast HW */
225 } J_DCT_METHOD;
227 #ifndef JDCT_DEFAULT /* may be overridden in jconfig.h */
228 #define JDCT_DEFAULT JDCT_ISLOW
229 #endif
230 #ifndef JDCT_FASTEST /* may be overridden in jconfig.h */
231 #define JDCT_FASTEST JDCT_IFAST
232 #endif
234 /* Dithering options for decompression. */
236 typedef enum {
237 JDITHER_NONE, /* no dithering */
238 JDITHER_ORDERED, /* simple ordered dither */
239 JDITHER_FS /* Floyd-Steinberg error diffusion dither */
240 } J_DITHER_MODE;
243 /* Common fields between JPEG compression and decompression master structs. */
245 #define jpeg_common_fields \
246 struct jpeg_error_mgr * err; /* Error handler module */\
247 struct jpeg_memory_mgr * mem; /* Memory manager module */\
248 struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\
249 void * client_data; /* Available for use by application */\
250 boolean is_decompressor; /* So common code can tell which is which */\
251 int global_state /* For checking call sequence validity */
253 /* Routines that are to be used by both halves of the library are declared
254 * to receive a pointer to this structure. There are no actual instances of
255 * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct.
256 */
257 struct jpeg_common_struct {
258 jpeg_common_fields; /* Fields common to both master struct types */
259 /* Additional fields follow in an actual jpeg_compress_struct or
260 * jpeg_decompress_struct. All three structs must agree on these
261 * initial fields! (This would be a lot cleaner in C++.)
262 */
263 };
265 typedef struct jpeg_common_struct * j_common_ptr;
266 typedef struct jpeg_compress_struct * j_compress_ptr;
267 typedef struct jpeg_decompress_struct * j_decompress_ptr;
270 /* Master record for a compression instance */
272 struct jpeg_compress_struct {
273 jpeg_common_fields; /* Fields shared with jpeg_decompress_struct */
275 /* Destination for compressed data */
276 struct jpeg_destination_mgr * dest;
278 /* Description of source image --- these fields must be filled in by
279 * outer application before starting compression. in_color_space must
280 * be correct before you can even call jpeg_set_defaults().
281 */
283 JDIMENSION image_width; /* input image width */
284 JDIMENSION image_height; /* input image height */
285 int input_components; /* # of color components in input image */
286 J_COLOR_SPACE in_color_space; /* colorspace of input image */
288 double input_gamma; /* image gamma of input image */
290 /* Compression parameters --- these fields must be set before calling
291 * jpeg_start_compress(). We recommend calling jpeg_set_defaults() to
292 * initialize everything to reasonable defaults, then changing anything
293 * the application specifically wants to change. That way you won't get
294 * burnt when new parameters are added. Also note that there are several
295 * helper routines to simplify changing parameters.
296 */
298 int data_precision; /* bits of precision in image data */
300 int num_components; /* # of color components in JPEG image */
301 J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
303 jpeg_component_info * comp_info;
304 /* comp_info[i] describes component that appears i'th in SOF */
306 JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
307 /* ptrs to coefficient quantization tables, or NULL if not defined */
309 JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
310 JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
311 /* ptrs to Huffman coding tables, or NULL if not defined */
313 UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
314 UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
315 UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
317 int num_scans; /* # of entries in scan_info array */
318 const jpeg_scan_info * scan_info; /* script for multi-scan file, or NULL */
319 /* The default value of scan_info is NULL, which causes a single-scan
320 * sequential JPEG file to be emitted. To create a multi-scan file,
321 * set num_scans and scan_info to point to an array of scan definitions.
322 */
324 boolean raw_data_in; /* TRUE=caller supplies downsampled data */
325 boolean arith_code; /* TRUE=arithmetic coding, FALSE=Huffman */
326 boolean optimize_coding; /* TRUE=optimize entropy encoding parms */
327 boolean CCIR601_sampling; /* TRUE=first samples are cosited */
328 int smoothing_factor; /* 1..100, or 0 for no input smoothing */
329 J_DCT_METHOD dct_method; /* DCT algorithm selector */
331 /* The restart interval can be specified in absolute MCUs by setting
332 * restart_interval, or in MCU rows by setting restart_in_rows
333 * (in which case the correct restart_interval will be figured
334 * for each scan).
335 */
336 unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */
337 int restart_in_rows; /* if > 0, MCU rows per restart interval */
339 /* Parameters controlling emission of special markers. */
341 boolean write_JFIF_header; /* should a JFIF marker be written? */
342 UINT8 JFIF_major_version; /* What to write for the JFIF version number */
343 UINT8 JFIF_minor_version;
344 /* These three values are not used by the JPEG code, merely copied */
345 /* into the JFIF APP0 marker. density_unit can be 0 for unknown, */
346 /* 1 for dots/inch, or 2 for dots/cm. Note that the pixel aspect */
347 /* ratio is defined by X_density/Y_density even when density_unit=0. */
348 UINT8 density_unit; /* JFIF code for pixel size units */
349 UINT16 X_density; /* Horizontal pixel density */
350 UINT16 Y_density; /* Vertical pixel density */
351 boolean write_Adobe_marker; /* should an Adobe marker be written? */
353 /* State variable: index of next scanline to be written to
354 * jpeg_write_scanlines(). Application may use this to control its
355 * processing loop, e.g., "while (next_scanline < image_height)".
356 */
358 JDIMENSION next_scanline; /* 0 .. image_height-1 */
360 /* Remaining fields are known throughout compressor, but generally
361 * should not be touched by a surrounding application.
362 */
364 /*
365 * These fields are computed during compression startup
366 */
367 boolean progressive_mode; /* TRUE if scan script uses progressive mode */
368 int max_h_samp_factor; /* largest h_samp_factor */
369 int max_v_samp_factor; /* largest v_samp_factor */
371 JDIMENSION total_iMCU_rows; /* # of iMCU rows to be input to coef ctlr */
372 /* The coefficient controller receives data in units of MCU rows as defined
373 * for fully interleaved scans (whether the JPEG file is interleaved or not).
374 * There are v_samp_factor * DCTSIZE sample rows of each component in an
375 * "iMCU" (interleaved MCU) row.
376 */
378 /*
379 * These fields are valid during any one scan.
380 * They describe the components and MCUs actually appearing in the scan.
381 */
382 int comps_in_scan; /* # of JPEG components in this scan */
383 jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
384 /* *cur_comp_info[i] describes component that appears i'th in SOS */
386 JDIMENSION MCUs_per_row; /* # of MCUs across the image */
387 JDIMENSION MCU_rows_in_scan; /* # of MCU rows in the image */
389 int blocks_in_MCU; /* # of DCT blocks per MCU */
390 int MCU_membership[C_MAX_BLOCKS_IN_MCU];
391 /* MCU_membership[i] is index in cur_comp_info of component owning */
392 /* i'th block in an MCU */
394 int Ss, Se, Ah, Al; /* progressive JPEG parameters for scan */
396 /*
397 * Links to compression subobjects (methods and private variables of modules)
398 */
399 struct jpeg_comp_master * master;
400 struct jpeg_c_main_controller * main;
401 struct jpeg_c_prep_controller * prep;
402 struct jpeg_c_coef_controller * coef;
403 struct jpeg_marker_writer * marker;
404 struct jpeg_color_converter * cconvert;
405 struct jpeg_downsampler * downsample;
406 struct jpeg_forward_dct * fdct;
407 struct jpeg_entropy_encoder * entropy;
408 jpeg_scan_info * script_space; /* workspace for jpeg_simple_progression */
409 int script_space_size;
410 };
413 /* Master record for a decompression instance */
415 struct jpeg_decompress_struct {
416 jpeg_common_fields; /* Fields shared with jpeg_compress_struct */
418 /* Source of compressed data */
419 struct jpeg_source_mgr * src;
421 /* Basic description of image --- filled in by jpeg_read_header(). */
422 /* Application may inspect these values to decide how to process image. */
424 JDIMENSION image_width; /* nominal image width (from SOF marker) */
425 JDIMENSION image_height; /* nominal image height */
426 int num_components; /* # of color components in JPEG image */
427 J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
429 /* Decompression processing parameters --- these fields must be set before
430 * calling jpeg_start_decompress(). Note that jpeg_read_header() initializes
431 * them to default values.
432 */
434 J_COLOR_SPACE out_color_space; /* colorspace for output */
436 unsigned int scale_num, scale_denom; /* fraction by which to scale image */
438 double output_gamma; /* image gamma wanted in output */
440 boolean buffered_image; /* TRUE=multiple output passes */
441 boolean raw_data_out; /* TRUE=downsampled data wanted */
443 J_DCT_METHOD dct_method; /* IDCT algorithm selector */
444 boolean do_fancy_upsampling; /* TRUE=apply fancy upsampling */
445 boolean do_block_smoothing; /* TRUE=apply interblock smoothing */
447 boolean quantize_colors; /* TRUE=colormapped output wanted */
448 /* the following are ignored if not quantize_colors: */
449 J_DITHER_MODE dither_mode; /* type of color dithering to use */
450 boolean two_pass_quantize; /* TRUE=use two-pass color quantization */
451 int desired_number_of_colors; /* max # colors to use in created colormap */
452 /* these are significant only in buffered-image mode: */
453 boolean enable_1pass_quant; /* enable future use of 1-pass quantizer */
454 boolean enable_external_quant;/* enable future use of external colormap */
455 boolean enable_2pass_quant; /* enable future use of 2-pass quantizer */
457 /* Description of actual output image that will be returned to application.
458 * These fields are computed by jpeg_start_decompress().
459 * You can also use jpeg_calc_output_dimensions() to determine these values
460 * in advance of calling jpeg_start_decompress().
461 */
463 JDIMENSION output_width; /* scaled image width */
464 JDIMENSION output_height; /* scaled image height */
465 int out_color_components; /* # of color components in out_color_space */
466 int output_components; /* # of color components returned */
467 /* output_components is 1 (a colormap index) when quantizing colors;
468 * otherwise it equals out_color_components.
469 */
470 int rec_outbuf_height; /* min recommended height of scanline buffer */
471 /* If the buffer passed to jpeg_read_scanlines() is less than this many rows
472 * high, space and time will be wasted due to unnecessary data copying.
473 * Usually rec_outbuf_height will be 1 or 2, at most 4.
474 */
476 /* When quantizing colors, the output colormap is described by these fields.
477 * The application can supply a colormap by setting colormap non-NULL before
478 * calling jpeg_start_decompress; otherwise a colormap is created during
479 * jpeg_start_decompress or jpeg_start_output.
480 * The map has out_color_components rows and actual_number_of_colors columns.
481 */
482 int actual_number_of_colors; /* number of entries in use */
483 JSAMPARRAY colormap; /* The color map as a 2-D pixel array */
485 /* State variables: these variables indicate the progress of decompression.
486 * The application may examine these but must not modify them.
487 */
489 /* Row index of next scanline to be read from jpeg_read_scanlines().
490 * Application may use this to control its processing loop, e.g.,
491 * "while (output_scanline < output_height)".
492 */
493 JDIMENSION output_scanline; /* 0 .. output_height-1 */
495 /* Current input scan number and number of iMCU rows completed in scan.
496 * These indicate the progress of the decompressor input side.
497 */
498 int input_scan_number; /* Number of SOS markers seen so far */
499 JDIMENSION input_iMCU_row; /* Number of iMCU rows completed */
501 /* The "output scan number" is the notional scan being displayed by the
502 * output side. The decompressor will not allow output scan/row number
503 * to get ahead of input scan/row, but it can fall arbitrarily far behind.
504 */
505 int output_scan_number; /* Nominal scan number being displayed */
506 JDIMENSION output_iMCU_row; /* Number of iMCU rows read */
508 /* Current progression status. coef_bits[c][i] indicates the precision
509 * with which component c's DCT coefficient i (in zigzag order) is known.
510 * It is -1 when no data has yet been received, otherwise it is the point
511 * transform (shift) value for the most recent scan of the coefficient
512 * (thus, 0 at completion of the progression).
513 * This pointer is NULL when reading a non-progressive file.
514 */
515 int (*coef_bits)[DCTSIZE2]; /* -1 or current Al value for each coef */
517 /* Internal JPEG parameters --- the application usually need not look at
518 * these fields. Note that the decompressor output side may not use
519 * any parameters that can change between scans.
520 */
522 /* Quantization and Huffman tables are carried forward across input
523 * datastreams when processing abbreviated JPEG datastreams.
524 */
526 JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
527 /* ptrs to coefficient quantization tables, or NULL if not defined */
529 JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
530 JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
531 /* ptrs to Huffman coding tables, or NULL if not defined */
533 /* These parameters are never carried across datastreams, since they
534 * are given in SOF/SOS markers or defined to be reset by SOI.
535 */
537 int data_precision; /* bits of precision in image data */
539 jpeg_component_info * comp_info;
540 /* comp_info[i] describes component that appears i'th in SOF */
542 boolean progressive_mode; /* TRUE if SOFn specifies progressive mode */
543 boolean arith_code; /* TRUE=arithmetic coding, FALSE=Huffman */
545 UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
546 UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
547 UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
549 unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */
551 /* These fields record data obtained from optional markers recognized by
552 * the JPEG library.
553 */
554 boolean saw_JFIF_marker; /* TRUE iff a JFIF APP0 marker was found */
555 /* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */
556 UINT8 JFIF_major_version; /* JFIF version number */
557 UINT8 JFIF_minor_version;
558 UINT8 density_unit; /* JFIF code for pixel size units */
559 UINT16 X_density; /* Horizontal pixel density */
560 UINT16 Y_density; /* Vertical pixel density */
561 boolean saw_Adobe_marker; /* TRUE iff an Adobe APP14 marker was found */
562 UINT8 Adobe_transform; /* Color transform code from Adobe marker */
564 boolean CCIR601_sampling; /* TRUE=first samples are cosited */
566 /* Aside from the specific data retained from APPn markers known to the
567 * library, the uninterpreted contents of any or all APPn and COM markers
568 * can be saved in a list for examination by the application.
569 */
570 jpeg_saved_marker_ptr marker_list; /* Head of list of saved markers */
572 /* Remaining fields are known throughout decompressor, but generally
573 * should not be touched by a surrounding application.
574 */
576 /*
577 * These fields are computed during decompression startup
578 */
579 int max_h_samp_factor; /* largest h_samp_factor */
580 int max_v_samp_factor; /* largest v_samp_factor */
582 int min_DCT_scaled_size; /* smallest DCT_scaled_size of any component */
584 JDIMENSION total_iMCU_rows; /* # of iMCU rows in image */
585 /* The coefficient controller's input and output progress is measured in
586 * units of "iMCU" (interleaved MCU) rows. These are the same as MCU rows
587 * in fully interleaved JPEG scans, but are used whether the scan is
588 * interleaved or not. We define an iMCU row as v_samp_factor DCT block
589 * rows of each component. Therefore, the IDCT output contains
590 * v_samp_factor*DCT_scaled_size sample rows of a component per iMCU row.
591 */
593 JSAMPLE * sample_range_limit; /* table for fast range-limiting */
595 /*
596 * These fields are valid during any one scan.
597 * They describe the components and MCUs actually appearing in the scan.
598 * Note that the decompressor output side must not use these fields.
599 */
600 int comps_in_scan; /* # of JPEG components in this scan */
601 jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
602 /* *cur_comp_info[i] describes component that appears i'th in SOS */
604 JDIMENSION MCUs_per_row; /* # of MCUs across the image */
605 JDIMENSION MCU_rows_in_scan; /* # of MCU rows in the image */
607 int blocks_in_MCU; /* # of DCT blocks per MCU */
608 int MCU_membership[D_MAX_BLOCKS_IN_MCU];
609 /* MCU_membership[i] is index in cur_comp_info of component owning */
610 /* i'th block in an MCU */
612 int Ss, Se, Ah, Al; /* progressive JPEG parameters for scan */
614 /* This field is shared between entropy decoder and marker parser.
615 * It is either zero or the code of a JPEG marker that has been
616 * read from the data source, but has not yet been processed.
617 */
618 int unread_marker;
620 /*
621 * Links to decompression subobjects (methods, private variables of modules)
622 */
623 struct jpeg_decomp_master * master;
624 struct jpeg_d_main_controller * main;
625 struct jpeg_d_coef_controller * coef;
626 struct jpeg_d_post_controller * post;
627 struct jpeg_input_controller * inputctl;
628 struct jpeg_marker_reader * marker;
629 struct jpeg_entropy_decoder * entropy;
630 struct jpeg_inverse_dct * idct;
631 struct jpeg_upsampler * upsample;
632 struct jpeg_color_deconverter * cconvert;
633 struct jpeg_color_quantizer * cquantize;
634 };
637 /* "Object" declarations for JPEG modules that may be supplied or called
638 * directly by the surrounding application.
639 * As with all objects in the JPEG library, these structs only define the
640 * publicly visible methods and state variables of a module. Additional
641 * private fields may exist after the public ones.
642 */
645 /* Error handler object */
647 struct jpeg_error_mgr {
648 /* Error exit handler: does not return to caller */
649 JMETHOD(void, error_exit, (j_common_ptr cinfo));
650 /* Conditionally emit a trace or warning message */
651 JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level));
652 /* Routine that actually outputs a trace or error message */
653 JMETHOD(void, output_message, (j_common_ptr cinfo));
654 /* Format a message string for the most recent JPEG error or message */
655 JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer));
656 #define JMSG_LENGTH_MAX 200 /* recommended size of format_message buffer */
657 /* Reset error state variables at start of a new image */
658 JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo));
660 /* The message ID code and any parameters are saved here.
661 * A message can have one string parameter or up to 8 int parameters.
662 */
663 int msg_code;
664 #define JMSG_STR_PARM_MAX 80
665 union {
666 int i[8];
667 char s[JMSG_STR_PARM_MAX];
668 } msg_parm;
670 /* Standard state variables for error facility */
672 int trace_level; /* max msg_level that will be displayed */
674 /* For recoverable corrupt-data errors, we emit a warning message,
675 * but keep going unless emit_message chooses to abort. emit_message
676 * should count warnings in num_warnings. The surrounding application
677 * can check for bad data by seeing if num_warnings is nonzero at the
678 * end of processing.
679 */
680 long num_warnings; /* number of corrupt-data warnings */
682 /* These fields point to the table(s) of error message strings.
683 * An application can change the table pointer to switch to a different
684 * message list (typically, to change the language in which errors are
685 * reported). Some applications may wish to add additional error codes
686 * that will be handled by the JPEG library error mechanism; the second
687 * table pointer is used for this purpose.
688 *
689 * First table includes all errors generated by JPEG library itself.
690 * Error code 0 is reserved for a "no such error string" message.
691 */
692 const char * const * jpeg_message_table; /* Library errors */
693 int last_jpeg_message; /* Table contains strings 0..last_jpeg_message */
694 /* Second table can be added by application (see cjpeg/djpeg for example).
695 * It contains strings numbered first_addon_message..last_addon_message.
696 */
697 const char * const * addon_message_table; /* Non-library errors */
698 int first_addon_message; /* code for first string in addon table */
699 int last_addon_message; /* code for last string in addon table */
700 };
703 /* Progress monitor object */
705 struct jpeg_progress_mgr {
706 JMETHOD(void, progress_monitor, (j_common_ptr cinfo));
708 long pass_counter; /* work units completed in this pass */
709 long pass_limit; /* total number of work units in this pass */
710 int completed_passes; /* passes completed so far */
711 int total_passes; /* total number of passes expected */
712 };
715 /* Data destination object for compression */
717 struct jpeg_destination_mgr {
718 JOCTET * next_output_byte; /* => next byte to write in buffer */
719 size_t free_in_buffer; /* # of byte spaces remaining in buffer */
721 JMETHOD(void, init_destination, (j_compress_ptr cinfo));
722 JMETHOD(boolean, empty_output_buffer, (j_compress_ptr cinfo));
723 JMETHOD(void, term_destination, (j_compress_ptr cinfo));
724 };
727 /* Data source object for decompression */
729 struct jpeg_source_mgr {
730 const JOCTET * next_input_byte; /* => next byte to read from buffer */
731 size_t bytes_in_buffer; /* # of bytes remaining in buffer */
733 JMETHOD(void, init_source, (j_decompress_ptr cinfo));
734 JMETHOD(boolean, fill_input_buffer, (j_decompress_ptr cinfo));
735 JMETHOD(void, skip_input_data, (j_decompress_ptr cinfo, long num_bytes));
736 JMETHOD(boolean, resync_to_restart, (j_decompress_ptr cinfo, int desired));
737 JMETHOD(void, term_source, (j_decompress_ptr cinfo));
738 };
741 /* Memory manager object.
742 * Allocates "small" objects (a few K total), "large" objects (tens of K),
743 * and "really big" objects (virtual arrays with backing store if needed).
744 * The memory manager does not allow individual objects to be freed; rather,
745 * each created object is assigned to a pool, and whole pools can be freed
746 * at once. This is faster and more convenient than remembering exactly what
747 * to free, especially where malloc()/free() are not too speedy.
748 * NB: alloc routines never return NULL. They exit to error_exit if not
749 * successful.
750 */
752 #define JPOOL_PERMANENT 0 /* lasts until master record is destroyed */
753 #define JPOOL_IMAGE 1 /* lasts until done with image/datastream */
754 #define JPOOL_NUMPOOLS 2
756 typedef struct jvirt_sarray_control * jvirt_sarray_ptr;
757 typedef struct jvirt_barray_control * jvirt_barray_ptr;
760 struct jpeg_memory_mgr {
761 /* Method pointers */
762 JMETHOD(void *, alloc_small, (j_common_ptr cinfo, int pool_id,
763 size_t sizeofobject));
764 JMETHOD(void FAR *, alloc_large, (j_common_ptr cinfo, int pool_id,
765 size_t sizeofobject));
766 JMETHOD(JSAMPARRAY, alloc_sarray, (j_common_ptr cinfo, int pool_id,
767 JDIMENSION samplesperrow,
768 JDIMENSION numrows));
769 JMETHOD(JBLOCKARRAY, alloc_barray, (j_common_ptr cinfo, int pool_id,
770 JDIMENSION blocksperrow,
771 JDIMENSION numrows));
772 JMETHOD(jvirt_sarray_ptr, request_virt_sarray, (j_common_ptr cinfo,
773 int pool_id,
774 boolean pre_zero,
775 JDIMENSION samplesperrow,
776 JDIMENSION numrows,
777 JDIMENSION maxaccess));
778 JMETHOD(jvirt_barray_ptr, request_virt_barray, (j_common_ptr cinfo,
779 int pool_id,
780 boolean pre_zero,
781 JDIMENSION blocksperrow,
782 JDIMENSION numrows,
783 JDIMENSION maxaccess));
784 JMETHOD(void, realize_virt_arrays, (j_common_ptr cinfo));
785 JMETHOD(JSAMPARRAY, access_virt_sarray, (j_common_ptr cinfo,
786 jvirt_sarray_ptr ptr,
787 JDIMENSION start_row,
788 JDIMENSION num_rows,
789 boolean writable));
790 JMETHOD(JBLOCKARRAY, access_virt_barray, (j_common_ptr cinfo,
791 jvirt_barray_ptr ptr,
792 JDIMENSION start_row,
793 JDIMENSION num_rows,
794 boolean writable));
795 JMETHOD(void, free_pool, (j_common_ptr cinfo, int pool_id));
796 JMETHOD(void, self_destruct, (j_common_ptr cinfo));
798 /* Limit on memory allocation for this JPEG object. (Note that this is
799 * merely advisory, not a guaranteed maximum; it only affects the space
800 * used for virtual-array buffers.) May be changed by outer application
801 * after creating the JPEG object.
802 */
803 size_t max_memory_to_use;
805 /* Maximum allocation request accepted by alloc_large. */
806 size_t max_alloc_chunk;
807 };
810 /* Routine signature for application-supplied marker processing methods.
811 * Need not pass marker code since it is stored in cinfo->unread_marker.
812 */
813 typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
816 /* Declarations for routines called by application.
817 * The JPP macro hides prototype parameters from compilers that can't cope.
818 * Note JPP requires double parentheses.
819 */
821 #ifdef HAVE_PROTOTYPES
822 #define JPP(arglist) arglist
823 #else
824 #define JPP(arglist) ()
825 #endif
828 /* Short forms of external names for systems with brain-damaged linkers.
829 * We shorten external names to be unique in the first six letters, which
830 * is good enough for all known systems.
831 * (If your compiler itself needs names to be unique in less than 15
832 * characters, you are out of luck. Get a better compiler.)
833 */
835 #ifdef NEED_SHORT_EXTERNAL_NAMES
836 #define jpeg_std_error jStdError
837 #define jpeg_CreateCompress jCreaCompress
838 #define jpeg_CreateDecompress jCreaDecompress
839 #define jpeg_destroy_compress jDestCompress
840 #define jpeg_destroy_decompress jDestDecompress
841 #define jpeg_stdio_dest jStdDest
842 #define jpeg_stdio_src jStdSrc
843 #define jpeg_set_defaults jSetDefaults
844 #define jpeg_set_colorspace jSetColorspace
845 #define jpeg_default_colorspace jDefColorspace
846 #define jpeg_set_quality jSetQuality
847 #define jpeg_set_linear_quality jSetLQuality
848 #define jpeg_add_quant_table jAddQuantTable
849 #define jpeg_quality_scaling jQualityScaling
850 #define jpeg_simple_progression jSimProgress
851 #define jpeg_suppress_tables jSuppressTables
852 #define jpeg_alloc_quant_table jAlcQTable
853 #define jpeg_alloc_huff_table jAlcHTable
854 #define jpeg_start_compress jStrtCompress
855 #define jpeg_write_scanlines jWrtScanlines
856 #define jpeg_finish_compress jFinCompress
857 #define jpeg_write_raw_data jWrtRawData
858 #define jpeg_write_marker jWrtMarker
859 #define jpeg_write_m_header jWrtMHeader
860 #define jpeg_write_m_byte jWrtMByte
861 #define jpeg_write_tables jWrtTables
862 #define jpeg_read_header jReadHeader
863 #define jpeg_start_decompress jStrtDecompress
864 #define jpeg_read_scanlines jReadScanlines
865 #define jpeg_finish_decompress jFinDecompress
866 #define jpeg_read_raw_data jReadRawData
867 #define jpeg_has_multiple_scans jHasMultScn
868 #define jpeg_start_output jStrtOutput
869 #define jpeg_finish_output jFinOutput
870 #define jpeg_input_complete jInComplete
871 #define jpeg_new_colormap jNewCMap
872 #define jpeg_consume_input jConsumeInput
873 #define jpeg_calc_output_dimensions jCalcDimensions
874 #define jpeg_save_markers jSaveMarkers
875 #define jpeg_set_marker_processor jSetMarker
876 #define jpeg_read_coefficients jReadCoefs
877 #define jpeg_write_coefficients jWrtCoefs
878 #define jpeg_copy_critical_parameters jCopyCrit
879 #define jpeg_abort_compress jAbrtCompress
880 #define jpeg_abort_decompress jAbrtDecompress
881 #define jpeg_abort jAbort
882 #define jpeg_destroy jDestroy
883 #define jpeg_resync_to_restart jResyncRestart
884 #endif /* NEED_SHORT_EXTERNAL_NAMES */
887 /* Default error-management setup */
888 EXTERN(struct jpeg_error_mgr *) jpeg_std_error
889 JPP((struct jpeg_error_mgr * err));
891 /* Initialization of JPEG compression objects.
892 * jpeg_create_compress() and jpeg_create_decompress() are the exported
893 * names that applications should call. These expand to calls on
894 * jpeg_CreateCompress and jpeg_CreateDecompress with additional information
895 * passed for version mismatch checking.
896 * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
897 */
898 #define jpeg_create_compress(cinfo) \
899 jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
900 (size_t) sizeof(struct jpeg_compress_struct))
901 #define jpeg_create_decompress(cinfo) \
902 jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
903 (size_t) sizeof(struct jpeg_decompress_struct))
904 EXTERN(void) jpeg_CreateCompress JPP((j_compress_ptr cinfo,
905 int version, size_t structsize));
906 EXTERN(void) jpeg_CreateDecompress JPP((j_decompress_ptr cinfo,
907 int version, size_t structsize));
908 /* Destruction of JPEG compression objects */
909 EXTERN(void) jpeg_destroy_compress JPP((j_compress_ptr cinfo));
910 EXTERN(void) jpeg_destroy_decompress JPP((j_decompress_ptr cinfo));
912 /* Standard data source and destination managers: stdio streams. */
913 /* Caller is responsible for opening the file before and closing after. */
914 EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
915 EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, FILE * infile));
917 /* Default parameter setup for compression */
918 EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
919 /* Compression parameter setup aids */
920 EXTERN(void) jpeg_set_colorspace JPP((j_compress_ptr cinfo,
921 J_COLOR_SPACE colorspace));
922 EXTERN(void) jpeg_default_colorspace JPP((j_compress_ptr cinfo));
923 EXTERN(void) jpeg_set_quality JPP((j_compress_ptr cinfo, int quality,
924 boolean force_baseline));
925 EXTERN(void) jpeg_set_linear_quality JPP((j_compress_ptr cinfo,
926 int scale_factor,
927 boolean force_baseline));
928 EXTERN(void) jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl,
929 const unsigned int *basic_table,
930 int scale_factor,
931 boolean force_baseline));
932 EXTERN(int) jpeg_quality_scaling JPP((int quality));
933 EXTERN(void) jpeg_simple_progression JPP((j_compress_ptr cinfo));
934 EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo,
935 boolean suppress));
936 EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
937 EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
939 /* Main entry points for compression */
940 EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo,
941 boolean write_all_tables));
942 EXTERN(JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo,
943 JSAMPARRAY scanlines,
944 JDIMENSION num_lines));
945 EXTERN(void) jpeg_finish_compress JPP((j_compress_ptr cinfo));
947 /* Replaces jpeg_write_scanlines when writing raw downsampled data. */
948 EXTERN(JDIMENSION) jpeg_write_raw_data JPP((j_compress_ptr cinfo,
949 JSAMPIMAGE data,
950 JDIMENSION num_lines));
952 /* Write a special marker. See libjpeg.doc concerning safe usage. */
953 EXTERN(void) jpeg_write_marker
954 JPP((j_compress_ptr cinfo, int marker,
955 const JOCTET * dataptr, unsigned int datalen));
956 /* Same, but piecemeal. */
957 EXTERN(void) jpeg_write_m_header
958 JPP((j_compress_ptr cinfo, int marker, unsigned int datalen));
959 EXTERN(void) jpeg_write_m_byte
960 JPP((j_compress_ptr cinfo, int val));
962 /* Alternate compression function: just write an abbreviated table file */
963 EXTERN(void) jpeg_write_tables JPP((j_compress_ptr cinfo));
965 /* Decompression startup: read start of JPEG datastream to see what's there */
966 EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
967 boolean require_image));
968 /* Return value is one of: */
969 #define JPEG_SUSPENDED 0 /* Suspended due to lack of input data */
970 #define JPEG_HEADER_OK 1 /* Found valid image datastream */
971 #define JPEG_HEADER_TABLES_ONLY 2 /* Found valid table-specs-only datastream */
972 /* If you pass require_image = TRUE (normal case), you need not check for
973 * a TABLES_ONLY return code; an abbreviated file will cause an error exit.
974 * JPEG_SUSPENDED is only possible if you use a data source module that can
975 * give a suspension return (the stdio source module doesn't).
976 */
978 /* Main entry points for decompression */
979 EXTERN(boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo));
980 EXTERN(JDIMENSION) jpeg_read_scanlines JPP((j_decompress_ptr cinfo,
981 JSAMPARRAY scanlines,
982 JDIMENSION max_lines));
983 EXTERN(boolean) jpeg_finish_decompress JPP((j_decompress_ptr cinfo));
985 /* Replaces jpeg_read_scanlines when reading raw downsampled data. */
986 EXTERN(JDIMENSION) jpeg_read_raw_data JPP((j_decompress_ptr cinfo,
987 JSAMPIMAGE data,
988 JDIMENSION max_lines));
990 /* Additional entry points for buffered-image mode. */
991 EXTERN(boolean) jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo));
992 EXTERN(boolean) jpeg_start_output JPP((j_decompress_ptr cinfo,
993 int scan_number));
994 EXTERN(boolean) jpeg_finish_output JPP((j_decompress_ptr cinfo));
995 EXTERN(boolean) jpeg_input_complete JPP((j_decompress_ptr cinfo));
996 EXTERN(void) jpeg_new_colormap JPP((j_decompress_ptr cinfo));
997 EXTERN(int) jpeg_consume_input JPP((j_decompress_ptr cinfo));
998 /* Return value is one of: */
999 /* #define JPEG_SUSPENDED 0 Suspended due to lack of input data */
1000 #define JPEG_REACHED_SOS 1 /* Reached start of new scan */
1001 #define JPEG_REACHED_EOI 2 /* Reached end of image */
1002 #define JPEG_ROW_COMPLETED 3 /* Completed one iMCU row */
1003 #define JPEG_SCAN_COMPLETED 4 /* Completed last iMCU row of a scan */
1005 /* Precalculate output dimensions for current decompression parameters. */
1006 EXTERN(void) jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo));
1008 /* Control saving of COM and APPn markers into marker_list. */
1009 EXTERN(void) jpeg_save_markers
1010 JPP((j_decompress_ptr cinfo, int marker_code,
1011 unsigned int length_limit));
1013 /* Install a special processing method for COM or APPn markers. */
1014 EXTERN(void) jpeg_set_marker_processor
1015 JPP((j_decompress_ptr cinfo, int marker_code,
1016 jpeg_marker_parser_method routine));
1018 /* Read or write raw DCT coefficients --- useful for lossless transcoding. */
1019 EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo));
1020 EXTERN(void) jpeg_write_coefficients JPP((j_compress_ptr cinfo,
1021 jvirt_barray_ptr * coef_arrays));
1022 EXTERN(void) jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
1023 j_compress_ptr dstinfo));
1025 /* If you choose to abort compression or decompression before completing
1026 * jpeg_finish_(de)compress, then you need to clean up to release memory,
1027 * temporary files, etc. You can just call jpeg_destroy_(de)compress
1028 * if you're done with the JPEG object, but if you want to clean it up and
1029 * reuse it, call this:
1030 */
1031 EXTERN(void) jpeg_abort_compress JPP((j_compress_ptr cinfo));
1032 EXTERN(void) jpeg_abort_decompress JPP((j_decompress_ptr cinfo));
1034 /* Generic versions of jpeg_abort and jpeg_destroy that work on either
1035 * flavor of JPEG object. These may be more convenient in some places.
1036 */
1037 EXTERN(void) jpeg_abort JPP((j_common_ptr cinfo));
1038 EXTERN(void) jpeg_destroy JPP((j_common_ptr cinfo));
1040 /* Default restart-marker-resync procedure for use by data source modules */
1041 EXTERN(boolean) jpeg_resync_to_restart JPP((j_decompress_ptr cinfo,
1042 int desired));
1045 /* These marker codes are exported since applications and data source modules
1046 * are likely to want to use them.
1047 */
1049 #define JPEG_RST0 0xD0 /* RST0 marker code */
1050 #define JPEG_EOI 0xD9 /* EOI marker code */
1051 #define JPEG_APP0 0xE0 /* APP0 marker code */
1052 #define JPEG_COM 0xFE /* COM marker code */
1055 /* If we have a brain-damaged compiler that emits warnings (or worse, errors)
1056 * for structure definitions that are never filled in, keep it quiet by
1057 * supplying dummy definitions for the various substructures.
1058 */
1060 #ifdef INCOMPLETE_TYPES_BROKEN
1061 #ifndef JPEG_INTERNALS /* will be defined in jpegint.h */
1062 struct jvirt_sarray_control { long dummy; };
1063 struct jvirt_barray_control { long dummy; };
1064 struct jpeg_comp_master { long dummy; };
1065 struct jpeg_c_main_controller { long dummy; };
1066 struct jpeg_c_prep_controller { long dummy; };
1067 struct jpeg_c_coef_controller { long dummy; };
1068 struct jpeg_marker_writer { long dummy; };
1069 struct jpeg_color_converter { long dummy; };
1070 struct jpeg_downsampler { long dummy; };
1071 struct jpeg_forward_dct { long dummy; };
1072 struct jpeg_entropy_encoder { long dummy; };
1073 struct jpeg_decomp_master { long dummy; };
1074 struct jpeg_d_main_controller { long dummy; };
1075 struct jpeg_d_coef_controller { long dummy; };
1076 struct jpeg_d_post_controller { long dummy; };
1077 struct jpeg_input_controller { long dummy; };
1078 struct jpeg_marker_reader { long dummy; };
1079 struct jpeg_entropy_decoder { long dummy; };
1080 struct jpeg_inverse_dct { long dummy; };
1081 struct jpeg_upsampler { long dummy; };
1082 struct jpeg_color_deconverter { long dummy; };
1083 struct jpeg_color_quantizer { long dummy; };
1084 #endif /* JPEG_INTERNALS */
1085 #endif /* INCOMPLETE_TYPES_BROKEN */
1088 /*
1089 * The JPEG library modules define JPEG_INTERNALS before including this file.
1090 * The internal structure declarations are read only when that is true.
1091 * Applications using the library should not include jpegint.h, but may wish
1092 * to include jerror.h.
1093 */
1095 #ifdef JPEG_INTERNALS
1096 #include "jpegint.h" /* fetch private declarations */
1097 #include "jerror.h" /* fetch error codes too */
1098 #endif
1100 #endif /* JPEGLIB_H */
