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/* common defs for jpeg read/write
*/
/*
Copyright (C) 1991-2005 The National Gallery
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifndef VIPS_JPEG_H
#define VIPS_JPEG_H
#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/
/* jpeglib defines its own boolean type as an enum which then clashes with
* everyone elses. Rename it as jboolean.
*/
#define boolean jboolean
/* Any TRUE/FALSE macros which have crept in will cause terrible confusion as
* well.
*/
#ifdef TRUE
#undef TRUE
#endif /*TRUE*/
#ifdef FALSE
#undef FALSE
#endif /*FALSE*/
#include <setjmp.h>
#include <jpeglib.h>
#include <jerror.h>
/* Our custom error message codes.
*/
#define JERR_VIPS_IMAGE_EOF (1000)
#define JWRN_VIPS_IMAGE_EOF JERR_VIPS_IMAGE_EOF
#define JERR_VIPS_TARGET_WRITE (1001)
/* Define a new error handler for when we bomb out.
*/
typedef struct {
/* Public fields.
*/
struct jpeg_error_mgr pub;
/* Private stuff for us.
*/
jmp_buf jmp; /* longjmp() here to get back to VIPS */
FILE *fp; /* fclose() if non-NULL */
} ErrorManager;
/* Stuff we track during a read.
*/
typedef struct _ReadJpeg {
VipsImage *out;
/* Shrink by this much during load. 1, 2, 4, 8.
*/
int shrink;
/* Types of error to cause failure.
*/
VipsFailOn fail_on;
struct jpeg_decompress_struct cinfo;
ErrorManager eman;
gboolean invert_pels;
/* Use orientation tag to automatically rotate and flip image
* during load.
*/
gboolean autorotate;
/* Remove DoS limits.
*/
gboolean unlimited;
/* cinfo->output_width and height can be larger than we want since
* libjpeg rounds up on shrink-on-load. This is the real size we will
* output, as opposed to the size we decompress to.
*/
int output_width;
int output_height;
/* The source we read from.
*/
VipsSource *source;
} ReadJpeg;
extern const char *vips__jpeg_message_table[];
void vips__new_output_message(j_common_ptr cinfo);
void vips__new_error_exit(j_common_ptr cinfo);
ReadJpeg *vips__readjpeg_new(VipsSource *source, VipsImage *out,
int shrink, VipsFailOn fail_on, gboolean autorotate,
gboolean unlimited);
int vips__readjpeg_open_input(ReadJpeg *jpeg);
#ifdef __cplusplus
}
#endif /*__cplusplus*/
#endif /*VIPS_JPEG_H*/
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