diff options
Diffstat (limited to 'plugins/FreeImage/Source/LibJPEG/jdatadst.c')
| -rw-r--r-- | plugins/FreeImage/Source/LibJPEG/jdatadst.c | 534 | 
1 files changed, 267 insertions, 267 deletions
diff --git a/plugins/FreeImage/Source/LibJPEG/jdatadst.c b/plugins/FreeImage/Source/LibJPEG/jdatadst.c index 0e9f14b84e..6981fb73de 100644 --- a/plugins/FreeImage/Source/LibJPEG/jdatadst.c +++ b/plugins/FreeImage/Source/LibJPEG/jdatadst.c @@ -1,267 +1,267 @@ -/*
 - * jdatadst.c
 - *
 - * Copyright (C) 1994-1996, Thomas G. Lane.
 - * Modified 2009 by Guido Vollbeding.
 - * This file is part of the Independent JPEG Group's software.
 - * For conditions of distribution and use, see the accompanying README file.
 - *
 - * This file contains compression data destination routines for the case of
 - * emitting JPEG data to memory or to a file (or any stdio stream).
 - * While these routines are sufficient for most applications,
 - * some will want to use a different destination manager.
 - * IMPORTANT: we assume that fwrite() will correctly transcribe an array of
 - * JOCTETs into 8-bit-wide elements on external storage.  If char is wider
 - * than 8 bits on your machine, you may need to do some tweaking.
 - */
 -
 -/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
 -#include "jinclude.h"
 -#include "jpeglib.h"
 -#include "jerror.h"
 -
 -#ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare malloc(),free() */
 -extern void * malloc JPP((size_t size));
 -extern void free JPP((void *ptr));
 -#endif
 -
 -
 -/* Expanded data destination object for stdio output */
 -
 -typedef struct {
 -  struct jpeg_destination_mgr pub; /* public fields */
 -
 -  FILE * outfile;		/* target stream */
 -  JOCTET * buffer;		/* start of buffer */
 -} my_destination_mgr;
 -
 -typedef my_destination_mgr * my_dest_ptr;
 -
 -#define OUTPUT_BUF_SIZE  4096	/* choose an efficiently fwrite'able size */
 -
 -
 -/* Expanded data destination object for memory output */
 -
 -typedef struct {
 -  struct jpeg_destination_mgr pub; /* public fields */
 -
 -  unsigned char ** outbuffer;	/* target buffer */
 -  unsigned long * outsize;
 -  unsigned char * newbuffer;	/* newly allocated buffer */
 -  JOCTET * buffer;		/* start of buffer */
 -  size_t bufsize;
 -} my_mem_destination_mgr;
 -
 -typedef my_mem_destination_mgr * my_mem_dest_ptr;
 -
 -
 -/*
 - * Initialize destination --- called by jpeg_start_compress
 - * before any data is actually written.
 - */
 -
 -METHODDEF(void)
 -init_destination (j_compress_ptr cinfo)
 -{
 -  my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
 -
 -  /* Allocate the output buffer --- it will be released when done with image */
 -  dest->buffer = (JOCTET *)
 -      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
 -				  OUTPUT_BUF_SIZE * SIZEOF(JOCTET));
 -
 -  dest->pub.next_output_byte = dest->buffer;
 -  dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
 -}
 -
 -METHODDEF(void)
 -init_mem_destination (j_compress_ptr cinfo)
 -{
 -  /* no work necessary here */
 -}
 -
 -
 -/*
 - * Empty the output buffer --- called whenever buffer fills up.
 - *
 - * In typical applications, this should write the entire output buffer
 - * (ignoring the current state of next_output_byte & free_in_buffer),
 - * reset the pointer & count to the start of the buffer, and return TRUE
 - * indicating that the buffer has been dumped.
 - *
 - * In applications that need to be able to suspend compression due to output
 - * overrun, a FALSE return indicates that the buffer cannot be emptied now.
 - * In this situation, the compressor will return to its caller (possibly with
 - * an indication that it has not accepted all the supplied scanlines).  The
 - * application should resume compression after it has made more room in the
 - * output buffer.  Note that there are substantial restrictions on the use of
 - * suspension --- see the documentation.
 - *
 - * When suspending, the compressor will back up to a convenient restart point
 - * (typically the start of the current MCU). next_output_byte & free_in_buffer
 - * indicate where the restart point will be if the current call returns FALSE.
 - * Data beyond this point will be regenerated after resumption, so do not
 - * write it out when emptying the buffer externally.
 - */
 -
 -METHODDEF(boolean)
 -empty_output_buffer (j_compress_ptr cinfo)
 -{
 -  my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
 -
 -  if (JFWRITE(dest->outfile, dest->buffer, OUTPUT_BUF_SIZE) !=
 -      (size_t) OUTPUT_BUF_SIZE)
 -    ERREXIT(cinfo, JERR_FILE_WRITE);
 -
 -  dest->pub.next_output_byte = dest->buffer;
 -  dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
 -
 -  return TRUE;
 -}
 -
 -METHODDEF(boolean)
 -empty_mem_output_buffer (j_compress_ptr cinfo)
 -{
 -  size_t nextsize;
 -  JOCTET * nextbuffer;
 -  my_mem_dest_ptr dest = (my_mem_dest_ptr) cinfo->dest;
 -
 -  /* Try to allocate new buffer with double size */
 -  nextsize = dest->bufsize * 2;
 -  nextbuffer = malloc(nextsize);
 -
 -  if (nextbuffer == NULL)
 -    ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 10);
 -
 -  MEMCOPY(nextbuffer, dest->buffer, dest->bufsize);
 -
 -  if (dest->newbuffer != NULL)
 -    free(dest->newbuffer);
 -
 -  dest->newbuffer = nextbuffer;
 -
 -  dest->pub.next_output_byte = nextbuffer + dest->bufsize;
 -  dest->pub.free_in_buffer = dest->bufsize;
 -
 -  dest->buffer = nextbuffer;
 -  dest->bufsize = nextsize;
 -
 -  return TRUE;
 -}
 -
 -
 -/*
 - * Terminate destination --- called by jpeg_finish_compress
 - * after all data has been written.  Usually needs to flush buffer.
 - *
 - * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
 - * application must deal with any cleanup that should happen even
 - * for error exit.
 - */
 -
 -METHODDEF(void)
 -term_destination (j_compress_ptr cinfo)
 -{
 -  my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
 -  size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
 -
 -  /* Write any data remaining in the buffer */
 -  if (datacount > 0) {
 -    if (JFWRITE(dest->outfile, dest->buffer, datacount) != datacount)
 -      ERREXIT(cinfo, JERR_FILE_WRITE);
 -  }
 -  fflush(dest->outfile);
 -  /* Make sure we wrote the output file OK */
 -  if (ferror(dest->outfile))
 -    ERREXIT(cinfo, JERR_FILE_WRITE);
 -}
 -
 -METHODDEF(void)
 -term_mem_destination (j_compress_ptr cinfo)
 -{
 -  my_mem_dest_ptr dest = (my_mem_dest_ptr) cinfo->dest;
 -
 -  *dest->outbuffer = dest->buffer;
 -  *dest->outsize = dest->bufsize - dest->pub.free_in_buffer;
 -}
 -
 -
 -/*
 - * Prepare for output to a stdio stream.
 - * The caller must have already opened the stream, and is responsible
 - * for closing it after finishing compression.
 - */
 -
 -GLOBAL(void)
 -jpeg_stdio_dest (j_compress_ptr cinfo, FILE * outfile)
 -{
 -  my_dest_ptr dest;
 -
 -  /* The destination object is made permanent so that multiple JPEG images
 -   * can be written to the same file without re-executing jpeg_stdio_dest.
 -   * This makes it dangerous to use this manager and a different destination
 -   * manager serially with the same JPEG object, because their private object
 -   * sizes may be different.  Caveat programmer.
 -   */
 -  if (cinfo->dest == NULL) {	/* first time for this JPEG object? */
 -    cinfo->dest = (struct jpeg_destination_mgr *)
 -      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
 -				  SIZEOF(my_destination_mgr));
 -  }
 -
 -  dest = (my_dest_ptr) cinfo->dest;
 -  dest->pub.init_destination = init_destination;
 -  dest->pub.empty_output_buffer = empty_output_buffer;
 -  dest->pub.term_destination = term_destination;
 -  dest->outfile = outfile;
 -}
 -
 -
 -/*
 - * Prepare for output to a memory buffer.
 - * The caller may supply an own initial buffer with appropriate size.
 - * Otherwise, or when the actual data output exceeds the given size,
 - * the library adapts the buffer size as necessary.
 - * The standard library functions malloc/free are used for allocating
 - * larger memory, so the buffer is available to the application after
 - * finishing compression, and then the application is responsible for
 - * freeing the requested memory.
 - */
 -
 -GLOBAL(void)
 -jpeg_mem_dest (j_compress_ptr cinfo,
 -	       unsigned char ** outbuffer, unsigned long * outsize)
 -{
 -  my_mem_dest_ptr dest;
 -
 -  if (outbuffer == NULL || outsize == NULL)	/* sanity check */
 -    ERREXIT(cinfo, JERR_BUFFER_SIZE);
 -
 -  /* The destination object is made permanent so that multiple JPEG images
 -   * can be written to the same buffer without re-executing jpeg_mem_dest.
 -   */
 -  if (cinfo->dest == NULL) {	/* first time for this JPEG object? */
 -    cinfo->dest = (struct jpeg_destination_mgr *)
 -      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
 -				  SIZEOF(my_mem_destination_mgr));
 -  }
 -
 -  dest = (my_mem_dest_ptr) cinfo->dest;
 -  dest->pub.init_destination = init_mem_destination;
 -  dest->pub.empty_output_buffer = empty_mem_output_buffer;
 -  dest->pub.term_destination = term_mem_destination;
 -  dest->outbuffer = outbuffer;
 -  dest->outsize = outsize;
 -  dest->newbuffer = NULL;
 -
 -  if (*outbuffer == NULL || *outsize == 0) {
 -    /* Allocate initial buffer */
 -    dest->newbuffer = *outbuffer = malloc(OUTPUT_BUF_SIZE);
 -    if (dest->newbuffer == NULL)
 -      ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 10);
 -    *outsize = OUTPUT_BUF_SIZE;
 -  }
 -
 -  dest->pub.next_output_byte = dest->buffer = *outbuffer;
 -  dest->pub.free_in_buffer = dest->bufsize = *outsize;
 -}
 +/* + * jdatadst.c + * + * Copyright (C) 1994-1996, Thomas G. Lane. + * Modified 2009-2012 by Guido Vollbeding. + * This file is part of the Independent JPEG Group's software. + * For conditions of distribution and use, see the accompanying README file. + * + * This file contains compression data destination routines for the case of + * emitting JPEG data to memory or to a file (or any stdio stream). + * While these routines are sufficient for most applications, + * some will want to use a different destination manager. + * IMPORTANT: we assume that fwrite() will correctly transcribe an array of + * JOCTETs into 8-bit-wide elements on external storage.  If char is wider + * than 8 bits on your machine, you may need to do some tweaking. + */ + +/* this is not a core library module, so it doesn't define JPEG_INTERNALS */ +#include "jinclude.h" +#include "jpeglib.h" +#include "jerror.h" + +#ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare malloc(),free() */ +extern void * malloc JPP((size_t size)); +extern void free JPP((void *ptr)); +#endif + + +/* Expanded data destination object for stdio output */ + +typedef struct { +  struct jpeg_destination_mgr pub; /* public fields */ + +  FILE * outfile;		/* target stream */ +  JOCTET * buffer;		/* start of buffer */ +} my_destination_mgr; + +typedef my_destination_mgr * my_dest_ptr; + +#define OUTPUT_BUF_SIZE  4096	/* choose an efficiently fwrite'able size */ + + +/* Expanded data destination object for memory output */ + +typedef struct { +  struct jpeg_destination_mgr pub; /* public fields */ + +  unsigned char ** outbuffer;	/* target buffer */ +  unsigned long * outsize; +  unsigned char * newbuffer;	/* newly allocated buffer */ +  JOCTET * buffer;		/* start of buffer */ +  size_t bufsize; +} my_mem_destination_mgr; + +typedef my_mem_destination_mgr * my_mem_dest_ptr; + + +/* + * Initialize destination --- called by jpeg_start_compress + * before any data is actually written. + */ + +METHODDEF(void) +init_destination (j_compress_ptr cinfo) +{ +  my_dest_ptr dest = (my_dest_ptr) cinfo->dest; + +  /* Allocate the output buffer --- it will be released when done with image */ +  dest->buffer = (JOCTET *) +      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, +				  OUTPUT_BUF_SIZE * SIZEOF(JOCTET)); + +  dest->pub.next_output_byte = dest->buffer; +  dest->pub.free_in_buffer = OUTPUT_BUF_SIZE; +} + +METHODDEF(void) +init_mem_destination (j_compress_ptr cinfo) +{ +  /* no work necessary here */ +} + + +/* + * Empty the output buffer --- called whenever buffer fills up. + * + * In typical applications, this should write the entire output buffer + * (ignoring the current state of next_output_byte & free_in_buffer), + * reset the pointer & count to the start of the buffer, and return TRUE + * indicating that the buffer has been dumped. + * + * In applications that need to be able to suspend compression due to output + * overrun, a FALSE return indicates that the buffer cannot be emptied now. + * In this situation, the compressor will return to its caller (possibly with + * an indication that it has not accepted all the supplied scanlines).  The + * application should resume compression after it has made more room in the + * output buffer.  Note that there are substantial restrictions on the use of + * suspension --- see the documentation. + * + * When suspending, the compressor will back up to a convenient restart point + * (typically the start of the current MCU). next_output_byte & free_in_buffer + * indicate where the restart point will be if the current call returns FALSE. + * Data beyond this point will be regenerated after resumption, so do not + * write it out when emptying the buffer externally. + */ + +METHODDEF(boolean) +empty_output_buffer (j_compress_ptr cinfo) +{ +  my_dest_ptr dest = (my_dest_ptr) cinfo->dest; + +  if (JFWRITE(dest->outfile, dest->buffer, OUTPUT_BUF_SIZE) != +      (size_t) OUTPUT_BUF_SIZE) +    ERREXIT(cinfo, JERR_FILE_WRITE); + +  dest->pub.next_output_byte = dest->buffer; +  dest->pub.free_in_buffer = OUTPUT_BUF_SIZE; + +  return TRUE; +} + +METHODDEF(boolean) +empty_mem_output_buffer (j_compress_ptr cinfo) +{ +  size_t nextsize; +  JOCTET * nextbuffer; +  my_mem_dest_ptr dest = (my_mem_dest_ptr) cinfo->dest; + +  /* Try to allocate new buffer with double size */ +  nextsize = dest->bufsize * 2; +  nextbuffer = (JOCTET *) malloc(nextsize); + +  if (nextbuffer == NULL) +    ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 10); + +  MEMCOPY(nextbuffer, dest->buffer, dest->bufsize); + +  if (dest->newbuffer != NULL) +    free(dest->newbuffer); + +  dest->newbuffer = nextbuffer; + +  dest->pub.next_output_byte = nextbuffer + dest->bufsize; +  dest->pub.free_in_buffer = dest->bufsize; + +  dest->buffer = nextbuffer; +  dest->bufsize = nextsize; + +  return TRUE; +} + + +/* + * Terminate destination --- called by jpeg_finish_compress + * after all data has been written.  Usually needs to flush buffer. + * + * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding + * application must deal with any cleanup that should happen even + * for error exit. + */ + +METHODDEF(void) +term_destination (j_compress_ptr cinfo) +{ +  my_dest_ptr dest = (my_dest_ptr) cinfo->dest; +  size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer; + +  /* Write any data remaining in the buffer */ +  if (datacount > 0) { +    if (JFWRITE(dest->outfile, dest->buffer, datacount) != datacount) +      ERREXIT(cinfo, JERR_FILE_WRITE); +  } +  fflush(dest->outfile); +  /* Make sure we wrote the output file OK */ +  if (ferror(dest->outfile)) +    ERREXIT(cinfo, JERR_FILE_WRITE); +} + +METHODDEF(void) +term_mem_destination (j_compress_ptr cinfo) +{ +  my_mem_dest_ptr dest = (my_mem_dest_ptr) cinfo->dest; + +  *dest->outbuffer = dest->buffer; +  *dest->outsize = dest->bufsize - dest->pub.free_in_buffer; +} + + +/* + * Prepare for output to a stdio stream. + * The caller must have already opened the stream, and is responsible + * for closing it after finishing compression. + */ + +GLOBAL(void) +jpeg_stdio_dest (j_compress_ptr cinfo, FILE * outfile) +{ +  my_dest_ptr dest; + +  /* The destination object is made permanent so that multiple JPEG images +   * can be written to the same file without re-executing jpeg_stdio_dest. +   * This makes it dangerous to use this manager and a different destination +   * manager serially with the same JPEG object, because their private object +   * sizes may be different.  Caveat programmer. +   */ +  if (cinfo->dest == NULL) {	/* first time for this JPEG object? */ +    cinfo->dest = (struct jpeg_destination_mgr *) +      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, +				  SIZEOF(my_destination_mgr)); +  } + +  dest = (my_dest_ptr) cinfo->dest; +  dest->pub.init_destination = init_destination; +  dest->pub.empty_output_buffer = empty_output_buffer; +  dest->pub.term_destination = term_destination; +  dest->outfile = outfile; +} + + +/* + * Prepare for output to a memory buffer. + * The caller may supply an own initial buffer with appropriate size. + * Otherwise, or when the actual data output exceeds the given size, + * the library adapts the buffer size as necessary. + * The standard library functions malloc/free are used for allocating + * larger memory, so the buffer is available to the application after + * finishing compression, and then the application is responsible for + * freeing the requested memory. + */ + +GLOBAL(void) +jpeg_mem_dest (j_compress_ptr cinfo, +	       unsigned char ** outbuffer, unsigned long * outsize) +{ +  my_mem_dest_ptr dest; + +  if (outbuffer == NULL || outsize == NULL)	/* sanity check */ +    ERREXIT(cinfo, JERR_BUFFER_SIZE); + +  /* The destination object is made permanent so that multiple JPEG images +   * can be written to the same buffer without re-executing jpeg_mem_dest. +   */ +  if (cinfo->dest == NULL) {	/* first time for this JPEG object? */ +    cinfo->dest = (struct jpeg_destination_mgr *) +      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, +				  SIZEOF(my_mem_destination_mgr)); +  } + +  dest = (my_mem_dest_ptr) cinfo->dest; +  dest->pub.init_destination = init_mem_destination; +  dest->pub.empty_output_buffer = empty_mem_output_buffer; +  dest->pub.term_destination = term_mem_destination; +  dest->outbuffer = outbuffer; +  dest->outsize = outsize; +  dest->newbuffer = NULL; + +  if (*outbuffer == NULL || *outsize == 0) { +    /* Allocate initial buffer */ +    dest->newbuffer = *outbuffer = (unsigned char *) malloc(OUTPUT_BUF_SIZE); +    if (dest->newbuffer == NULL) +      ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 10); +    *outsize = OUTPUT_BUF_SIZE; +  } + +  dest->pub.next_output_byte = dest->buffer = *outbuffer; +  dest->pub.free_in_buffer = dest->bufsize = *outsize; +}  | 
