jpeg.cc File Reference

#include <algorithm>
#include <csetjmp>
#include <cstdio>
#include "MEM_guardedalloc.h"
#include "BLI_fileops.h"
#include "BLI_listbase.h"
#include "BLI_string.h"
#include "BLI_utildefines.h"
#include "BKE_idprop.hh"
#include "DNA_ID.h"
#include "IMB_colormanagement.hh"
#include "IMB_filetype.hh"
#include "IMB_imbuf.hh"
#include "IMB_imbuf_types.hh"
#include "IMB_metadata.hh"
#include <cstring>
#include <jerror.h>
#include <jpeglib.h>

Go to the source code of this file.

Classes
struct	my_error_mgr
struct	my_source_mgr
struct	NeoGeo_Word

Macros
#define	MAKESTMT(stuff)
#define	INPUT_VARS(cinfo)
#define	INPUT_SYNC(cinfo)    (datasrc->next_input_byte = next_input_byte, datasrc->bytes_in_buffer = bytes_in_buffer)
#define	INPUT_RELOAD(cinfo)    (next_input_byte = datasrc->next_input_byte, bytes_in_buffer = datasrc->bytes_in_buffer)
#define	MAKE_BYTE_AVAIL(cinfo, action)
#define	INPUT_BYTE(cinfo, V, action)    MAKESTMT(MAKE_BYTE_AVAIL(cinfo, action); bytes_in_buffer--; V = GETJOCTET(*next_input_byte++);)
#define	INPUT_2BYTES(cinfo, V, action)
#define	JPEG_MARKER_MSB   (0xFF)
#define	JPEG_MARKER_SOI   (0xD8)
#define	JPEG_MARKER_APP1   (0xE1)
#define	JPEG_APP1_MAX   (1 << 16)

Typedefs
using	my_error_ptr = my_error_mgr *
using	my_src_ptr = my_source_mgr *

Functions
static void	jpeg_error (j_common_ptr cinfo) ATTR_NORETURN
static void	init_source (j_decompress_ptr cinfo)
static boolean	fill_input_buffer (j_decompress_ptr cinfo)
static void	skip_input_data (j_decompress_ptr cinfo, long num_bytes)
static void	term_source (j_decompress_ptr cinfo)
static void	memory_source (j_decompress_ptr cinfo, const uchar *buffer, size_t size)
static boolean	handle_app1 (j_decompress_ptr cinfo)
static ImBuf *	ibJpegImageFromCinfo (jpeg_decompress_struct *cinfo, int flags, int max_size, size_t *r_width, size_t *r_height)
bool	imb_is_a_jpeg (const uchar *mem, const size_t size)
	BLI_STATIC_ASSERT (sizeof(NeoGeo_Word)==4, "Must be 4 bytes")
ImBuf *	imb_load_jpeg (const uchar *buffer, size_t size, int flags, char colorspace[IM_MAX_SPACE])
ImBuf *	imb_thumbnail_jpeg (const char *filepath, const int flags, const size_t max_thumb_size, char colorspace[IM_MAX_SPACE], size_t *r_width, size_t *r_height)
static void	write_jpeg (jpeg_compress_struct *cinfo, ImBuf *ibuf)
static int	init_jpeg (FILE *outfile, jpeg_compress_struct *cinfo, ImBuf *ibuf)
static bool	save_stdjpeg (const char *filepath, ImBuf *ibuf)
bool	imb_savejpeg (ImBuf *ibuf, const char *filepath, int flags)

Variables
static const uchar	jpeg_default_quality = 75
static uchar	ibuf_quality

Macro Definition Documentation

INPUT_2BYTES

#define INPUT_2BYTES	(		cinfo,
			V,
			action )

Value:

  MAKESTMT(MAKE_BYTE_AVAIL(cinfo, action); bytes_in_buffer--; \
           V = uint(GETJOCTET(*next_input_byte++)) << 8; \
           MAKE_BYTE_AVAIL(cinfo, action); \
           bytes_in_buffer--; \
           V += GETJOCTET(*next_input_byte++);)

Definition at line 201 of file jpeg.cc.

Referenced by handle_app1().

INPUT_BYTE

#define INPUT_BYTE	(		cinfo,
			V,
			action )    MAKESTMT(MAKE_BYTE_AVAIL(cinfo, action); bytes_in_buffer--; V = GETJOCTET(*next_input_byte++);)

Definition at line 195 of file jpeg.cc.

Referenced by handle_app1().

INPUT_RELOAD

#define INPUT_RELOAD

(

cinfo

)

(next_input_byte = datasrc->next_input_byte, bytes_in_buffer = datasrc->bytes_in_buffer)

Definition at line 176 of file jpeg.cc.

INPUT_SYNC

#define INPUT_SYNC

(

cinfo

)

(datasrc->next_input_byte = next_input_byte, datasrc->bytes_in_buffer = bytes_in_buffer)

Definition at line 172 of file jpeg.cc.

Referenced by handle_app1().

INPUT_VARS

#define INPUT_VARS

(

cinfo

)

Value:

  jpeg_source_mgr *datasrc = (cinfo)->src; \
  const JOCTET *next_input_byte = datasrc->next_input_byte; \
  size_t bytes_in_buffer = datasrc->bytes_in_buffer

Definition at line 166 of file jpeg.cc.

Referenced by handle_app1().

JPEG_APP1_MAX

#define JPEG_APP1_MAX   (1 << 16)

Definition at line 477 of file jpeg.cc.

Referenced by imb_thumbnail_jpeg().

JPEG_MARKER_APP1

#define JPEG_MARKER_APP1   (0xE1)

Definition at line 476 of file jpeg.cc.

Referenced by imb_thumbnail_jpeg().

JPEG_MARKER_MSB

#define JPEG_MARKER_MSB   (0xFF)

Definition at line 474 of file jpeg.cc.

Referenced by imb_thumbnail_jpeg().

JPEG_MARKER_SOI

#define JPEG_MARKER_SOI   (0xD8)

Definition at line 475 of file jpeg.cc.

Referenced by imb_thumbnail_jpeg().

MAKE_BYTE_AVAIL

#define MAKE_BYTE_AVAIL	(		cinfo,
			action )

Value:

  if (bytes_in_buffer == 0) { \
    if (!(*datasrc->fill_input_buffer)(cinfo)) { \
      action; \
    } \
    INPUT_RELOAD(cinfo); \
  } \
  (void)0

Definition at line 183 of file jpeg.cc.

MAKESTMT

#define MAKESTMT

(

stuff

)

Value:

  do { \
    stuff \
  } while (0)

Definition at line 161 of file jpeg.cc.

Typedef Documentation

my_error_ptr

using my_error_ptr = my_error_mgr *

Definition at line 68 of file jpeg.cc.

my_src_ptr

using my_src_ptr = my_source_mgr *

Definition at line 96 of file jpeg.cc.

Function Documentation

BLI_STATIC_ASSERT()

BLI_STATIC_ASSERT	(	sizeof(NeoGeo_Word)	= =4,
		"Must be 4 bytes"	)

fill_input_buffer()

static boolean fill_input_buffer ( j_decompress_ptr cinfo )

static

Definition at line 103 of file jpeg.cc.

References my_source_mgr::pub, and my_source_mgr::terminal.

Referenced by memory_source().

handle_app1()

static boolean handle_app1 ( j_decompress_ptr cinfo )

static

Definition at line 216 of file jpeg.cc.

References ibuf_quality, INPUT_2BYTES, INPUT_BYTE, INPUT_SYNC, INPUT_VARS, length(), NeoGeo_Word::quality, and STRPREFIX.

Referenced by ibJpegImageFromCinfo().

ibJpegImageFromCinfo()

static ImBuf * ibJpegImageFromCinfo ( jpeg_decompress_struct * cinfo, int flags, int max_size, size_t * r_width, size_t * r_height )

static

Definition at line 244 of file jpeg.cc.

References b, BLI_strdupn(), BLI_strnlen(), ImBuf::byte_buffer, ImBufByteBuffer::data, double(), ImBuf::flags, float, ImBuf::foptions, ImBuf::ftype, handle_app1(), IB_metadata, IB_rect, IB_test, IB_uninitialized_pixels, ibuf_quality, IMB_allocImBuf(), IMB_FTYPE_JPG, IMB_metadata_ensure(), IMB_metadata_set_field(), jpeg_default_quality, max_uu(), MEM_freeN(), ImBuf::metadata, min_uu(), ImBuf::ppm, ImbFormatOptions::quality, str, STRPREFIX, ImBuf::x, x, ImBuf::y, and y.

Referenced by imb_load_jpeg(), and imb_thumbnail_jpeg().

imb_is_a_jpeg()

bool imb_is_a_jpeg	(	const uchar *	mem,
		const size_t	size )

Definition at line 49 of file jpeg.cc.

References magic().

Referenced by imb_load_jpeg().

imb_load_jpeg()

ImBuf * imb_load_jpeg	(	const uchar *	buffer,
		size_t	size,
		int	flags,
		char	colorspace[IM_MAX_SPACE] )

Definition at line 441 of file jpeg.cc.

References COLOR_ROLE_DEFAULT_BYTE, colorspace_set_default_role(), ibJpegImageFromCinfo(), IM_MAX_SPACE, imb_is_a_jpeg(), jpeg_error(), memory_source(), my_error_mgr::pub, and my_error_mgr::setjmp_buffer.

Referenced by imb_thumbnail_jpeg().

imb_savejpeg()

bool imb_savejpeg	(	ImBuf *	ibuf,
		const char *	filepath,
		int	flags )

Definition at line 746 of file jpeg.cc.

References ImBuf::flags, and save_stdjpeg().

imb_thumbnail_jpeg()

ImBuf * imb_thumbnail_jpeg	(	const char *	filepath,
		const int	flags,
		const size_t	max_thumb_size,
		char	colorspace[IM_MAX_SPACE],
		size_t *	r_width,
		size_t *	r_height )

Definition at line 479 of file jpeg.cc.

References BLI_fopen(), COLOR_ROLE_DEFAULT_BYTE, colorspace_set_default_role(), ibJpegImageFromCinfo(), IM_MAX_SPACE, imb_load_jpeg(), JPEG_APP1_MAX, jpeg_error(), JPEG_MARKER_APP1, JPEG_MARKER_MSB, JPEG_MARKER_SOI, MEM_callocN, MEM_SAFE_FREE, my_error_mgr::pub, and my_error_mgr::setjmp_buffer.

init_jpeg()

static int init_jpeg ( FILE * outfile, jpeg_compress_struct * cinfo, ImBuf * ibuf )

static

Definition at line 657 of file jpeg.cc.

References ImBuf::foptions, jpeg_default_quality, ImBuf::planes, ImbFormatOptions::quality, ImBuf::x, and ImBuf::y.

Referenced by save_stdjpeg().

init_source()

static void init_source ( j_decompress_ptr cinfo )

static

Definition at line 98 of file jpeg.cc.

Referenced by memory_source().

jpeg_error()

static void jpeg_error ( j_common_ptr cinfo )

static

Definition at line 70 of file jpeg.cc.

References my_error_mgr::setjmp_buffer.

Referenced by imb_load_jpeg(), imb_thumbnail_jpeg(), and save_stdjpeg().

memory_source()

static void memory_source ( j_decompress_ptr cinfo, const uchar * buffer, size_t size )

static

Definition at line 138 of file jpeg.cc.

References my_source_mgr::buffer, fill_input_buffer(), init_source(), my_source_mgr::pub, my_source_mgr::size, size(), skip_input_data(), and term_source().

Referenced by imb_load_jpeg().

save_stdjpeg()

static bool save_stdjpeg ( const char * filepath, ImBuf * ibuf )

static

Definition at line 712 of file jpeg.cc.

References BLI_fopen(), init_jpeg(), jpeg_error(), my_error_mgr::pub, my_error_mgr::setjmp_buffer, and write_jpeg().

Referenced by imb_savejpeg().

skip_input_data()

static void skip_input_data ( j_decompress_ptr cinfo, long num_bytes )

static

Definition at line 119 of file jpeg.cc.

References my_source_mgr::pub.

Referenced by memory_source().

term_source()

static void term_source ( j_decompress_ptr cinfo )

static

Definition at line 133 of file jpeg.cc.

Referenced by memory_source().

write_jpeg()

static void write_jpeg ( jpeg_compress_struct * cinfo, ImBuf * ibuf )

static

Definition at line 556 of file jpeg.cc.

References ARRAY_SIZE, BLI_snprintf_rlen(), ImBuf::byte_buffer, IDProperty::data, ImBufByteBuffer::data, ImBuf::foptions, IDPropertyData::group, IDP_STRING, IDP_String, LISTBASE_FOREACH, MEM_freeN(), MEM_mallocN, ImBuf::metadata, ImbFormatOptions::quality, NeoGeo_Word::quality, STREQ, STRNCPY, ImBuf::x, x, ImBuf::y, and y.

Referenced by save_stdjpeg().

Variable Documentation

ibuf_quality

uchar ibuf_quality

static

Definition at line 47 of file jpeg.cc.

Referenced by handle_app1(), and ibJpegImageFromCinfo().

jpeg_default_quality

const uchar jpeg_default_quality = 75

static

Definition at line 46 of file jpeg.cc.

Referenced by ibJpegImageFromCinfo(), and init_jpeg().