/* VIPS image class.
 *
 * 7/7/09
 * 	- from vips.h
 * 2/3/11
 * 	- move to GObject
 */

/*

	This file is part of VIPS.

	VIPS 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 of the License, or
	(at your option) any later version.

	This program 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 program; 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_IMAGE_H
#define VIPS_IMAGE_H

#include <glib.h>
#include <glib-object.h>
#include <vips/object.h>
#include <vips/connection.h>
#include <vips/rect.h>
#include <vips/region.h>

#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/

/* If you read MSB first, you get these two values.
 * intel order: byte 0 = b6
 * SPARC order: byte 0 = 08
 */
#define VIPS_MAGIC_INTEL (0xb6a6f208U)
#define VIPS_MAGIC_SPARC (0x08f2a6b6U)

/* We have a maximum value for a coordinate at various points for sanity
 * checking. For example, vips_black() has a max with and height. We use int
 * for width/height so we could go up to 2bn, but it's good to have a lower
 * value set so we can see crazy numbers early.
 *
 * This can be overridden with the `VIPS_MAX_COORD` env var, or the
 * `--vips-max-coord` CLI arg.
 */
#define VIPS_DEFAULT_MAX_COORD (100000000)

/* Fetch the overridden value.
 */
#define VIPS_MAX_COORD (vips_max_coord_get())

typedef enum {
	VIPS_DEMAND_STYLE_ERROR = -1,
	VIPS_DEMAND_STYLE_SMALLTILE,
	VIPS_DEMAND_STYLE_FATSTRIP,
	VIPS_DEMAND_STYLE_THINSTRIP,
	VIPS_DEMAND_STYLE_ANY
} VipsDemandStyle;

/* Types of image descriptor we may have. The type field is advisory only: it
 * does not imply that any fields in IMAGE have valid data.
 */
typedef enum {
	VIPS_IMAGE_ERROR = -1,
	VIPS_IMAGE_NONE,		   /* no type set */
	VIPS_IMAGE_SETBUF,		   /* malloced memory array */
	VIPS_IMAGE_SETBUF_FOREIGN, /* memory array, don't free on close */
	VIPS_IMAGE_OPENIN,		   /* input from fd with a window */
	VIPS_IMAGE_MMAPIN,		   /* memory mapped input file */
	VIPS_IMAGE_MMAPINRW,	   /* memory mapped read/write file */
	VIPS_IMAGE_OPENOUT,		   /* output to fd */
	VIPS_IMAGE_PARTIAL		   /* partial image */
} VipsImageType;

typedef enum {
	VIPS_INTERPRETATION_ERROR = -1,
	VIPS_INTERPRETATION_MULTIBAND = 0,
	VIPS_INTERPRETATION_B_W = 1,
	VIPS_INTERPRETATION_HISTOGRAM = 10,
	VIPS_INTERPRETATION_XYZ = 12,
	VIPS_INTERPRETATION_LAB = 13,
	VIPS_INTERPRETATION_CMYK = 15,
	VIPS_INTERPRETATION_LABQ = 16,
	VIPS_INTERPRETATION_RGB = 17,
	VIPS_INTERPRETATION_CMC = 18,
	VIPS_INTERPRETATION_LCH = 19,
	VIPS_INTERPRETATION_LABS = 21,
	VIPS_INTERPRETATION_sRGB = 22,
	VIPS_INTERPRETATION_YXY = 23,
	VIPS_INTERPRETATION_FOURIER = 24,
	VIPS_INTERPRETATION_RGB16 = 25,
	VIPS_INTERPRETATION_GREY16 = 26,
	VIPS_INTERPRETATION_MATRIX = 27,
	VIPS_INTERPRETATION_scRGB = 28,
	VIPS_INTERPRETATION_HSV = 29,
	VIPS_INTERPRETATION_LAST = 30
} VipsInterpretation;

typedef enum {
	VIPS_FORMAT_NOTSET = -1,
	VIPS_FORMAT_UCHAR = 0,
	VIPS_FORMAT_CHAR = 1,
	VIPS_FORMAT_USHORT = 2,
	VIPS_FORMAT_SHORT = 3,
	VIPS_FORMAT_UINT = 4,
	VIPS_FORMAT_INT = 5,
	VIPS_FORMAT_FLOAT = 6,
	VIPS_FORMAT_COMPLEX = 7,
	VIPS_FORMAT_DOUBLE = 8,
	VIPS_FORMAT_DPCOMPLEX = 9,
	VIPS_FORMAT_LAST = 10
} VipsBandFormat;

typedef enum {
	VIPS_CODING_ERROR = -1,
	VIPS_CODING_NONE = 0,
	VIPS_CODING_LABQ = 2,
	VIPS_CODING_RAD = 6,
	VIPS_CODING_LAST = 7
} VipsCoding;

typedef enum {
	VIPS_ACCESS_RANDOM,
	VIPS_ACCESS_SEQUENTIAL,
	VIPS_ACCESS_SEQUENTIAL_UNBUFFERED,
	VIPS_ACCESS_LAST
} VipsAccess;

typedef void *(*VipsStartFn)(VipsImage *out, void *a, void *b);
typedef int (*VipsGenerateFn)(VipsRegion *out,
	void *seq, void *a, void *b, gboolean *stop);
typedef int (*VipsStopFn)(void *seq, void *a, void *b);

/* Struct we keep a record of execution time in. Passed to eval signal so
 * it can assess progress.
 */
typedef struct _VipsProgress {
	/*< private >*/
	VipsImage *im; /* Image we are part of */

	/*< public >*/
	int run;	   /* Time we have been running */
	int eta;	   /* Estimated seconds of computation left */
	gint64 tpels;  /* Number of pels we expect to calculate */
	gint64 npels;  /* Number of pels calculated so far */
	int percent;   /* Percent complete */
	GTimer *start; /* Start time */
} VipsProgress;

#define VIPS_TYPE_IMAGE (vips_image_get_type())
#define VIPS_IMAGE(obj) \
	(G_TYPE_CHECK_INSTANCE_CAST((obj), \
		VIPS_TYPE_IMAGE, VipsImage))
#define VIPS_IMAGE_CLASS(klass) \
	(G_TYPE_CHECK_CLASS_CAST((klass), \
		VIPS_TYPE_IMAGE, VipsImageClass))
#define VIPS_IS_IMAGE(obj) \
	(G_TYPE_CHECK_INSTANCE_TYPE((obj), VIPS_TYPE_IMAGE))
#define VIPS_IS_IMAGE_CLASS(klass) \
	(G_TYPE_CHECK_CLASS_TYPE((klass), VIPS_TYPE_IMAGE))
#define VIPS_IMAGE_GET_CLASS(obj) \
	(G_TYPE_INSTANCE_GET_CLASS((obj), \
		VIPS_TYPE_IMAGE, VipsImageClass))

/* Matching typedef in basic.h.
 */
struct _VipsImage {
	VipsObject parent_instance;

	/*< private >*/

	/* We have to keep these names for compatibility with the old API.
	 * Don't use them though, use vips_image_get_width() and friends.
	 */

	int Xsize; /* image width, in pixels */
	int Ysize; /* image height, in pixels */
	int Bands; /* number of image bands */

	VipsBandFormat BandFmt;	 /* pixel format */
	VipsCoding Coding;		 /* pixel coding */
	VipsInterpretation Type; /* pixel interpretation */
	double Xres;			 /* horizontal pixels per millimetre */
	double Yres;			 /* vertical pixels per millimetre */

	int Xoffset; /* image origin hint */
	int Yoffset; /* image origin hint */

	/* No longer used, the names are here for compat with very, very old
	 * code.
	 */
	int Length;
	short Compression;
	short Level;
	int Bbits; /* was number of bits in this format */

	/* Old code expects to see this member, newer code has a param on
	 * eval().
	 */
	VipsProgress *time;

	/* Derived fields that some code can fiddle with. New code should use
	 * vips_image_get_history() and friends.
	 */
	char *Hist;		/* don't use, see vips_image_get_history() */
	char *filename; /* pointer to copy of filename */
	VipsPel *data;	/* start of image data for WIO */
	int kill;		/* set to non-zero to block eval */

	/* Everything below this private and only used internally by
	 * VipsImage.
	 */

	/* During vips image read and write we need temporary float-sized
	 * fields in the struct for staging xres/yres. Don't use these any
	 * other time.
	 */
	float Xres_float;
	float Yres_float;

	char *mode;			 /* mode string passed to _new() */
	VipsImageType dtype; /* descriptor type */
	int fd;				 /* file descriptor */
	void *baseaddr;		 /* pointer to the start of an mmap file */
	size_t length;		 /* size of mmap area */
	guint32 magic;		 /* magic from header, endian-ness of image */

	/* Partial image stuff. All these fields are initialised
	 * to NULL and ignored unless set by vips_image_generate() etc.
	 */
	VipsStartFn start_fn;
	VipsGenerateFn generate_fn;
	VipsStopFn stop_fn;
	void *client1; /* user arguments */
	void *client2;
	GMutex *sslock;		   /* start-stop lock */
	GSList *regions;	   /* list of regions current for this image */
	VipsDemandStyle dhint; /* demand style hint */

	/* Extra user-defined fields ... see vips_image_get() etc.
	 */
	GHashTable *meta;	   /* GhashTable of GValue */
	GSList *meta_traverse; /* traverse order for Meta */

	/* Part of mmap() read ... the sizeof() the header we skip from the
	 * file start. Usually VIPS_SIZEOF_HEADER, but can be something else
	 * for binary file read.
	 *
	 * guint64 so that we can guarantee to work even on systems with
	 * strange ideas about large files.
	 */
	gint64 sizeof_header;

	/* If this is a large disc image, don't map the whole thing, instead
	 * have a set of windows shared between the regions active on the
	 * image. List of VipsWindow.
	 */
	GSList *windows;

	/* Upstream/downstream relationships, built from args to
	 * vips_demand_hint().
	 *
	 * We use these to invalidate downstream pixel buffers.
	 * Use 'serial' to spot circular dependencies.
	 *
	 * See also hint_set below.
	 */
	GSList *upstream;
	GSList *downstream;
	int serial;

	/* Keep a list of recounted GValue strings so we can share hist
	 * efficiently.
	 */
	GSList *history_list;

	/* The VipsImage (if any) we should signal eval progress on.
	 */
	VipsImage *progress_signal;

	/* Record the file length here. We use this to stop ourselves mapping
	 * things beyond the end of the file in the case that the file has
	 * been truncated.
	 *
	 * gint64 so that we can guarantee to work even on systems with
	 * strange ideas about large files.
	 */
	gint64 file_length;

	/* Set this when vips_demand_hint_array() is called, and check in any
	 * operation that will demand pixels from the image.
	 *
	 * We use vips_demand_hint_array() to build the tree of
	 * upstream/downstream relationships, so it's a mandatory thing.
	 */
	gboolean hint_set;

	/* Delete-on-close is hard to do with signals and callbacks since we
	 * really need to do this in finalize after the fd has been closed,
	 * but you can't emit signals then.
	 *
	 * Also keep a private copy of the filename string to be deleted,
	 * since image->filename will be freed in _dispose().
	 */
	gboolean delete_on_close;
	char *delete_on_close_filename;
};

typedef struct _VipsImageClass {
	VipsObjectClass parent_class;

	/* Signals we emit.
	 */

	/* Evaluation is starting.
	 */
	void (*preeval)(VipsImage *image, VipsProgress *progress, void *data);

	/* Evaluation progress.
	 */
	void (*eval)(VipsImage *image, VipsProgress *progress, void *data);

	/* Evaluation is ending.
	 */
	void (*posteval)(VipsImage *image, VipsProgress *progress, void *data);

	/* An image has been written to.
	 * Used by eg. vips_image_new_mode("x.jpg", "w") to do the
	 * final write to jpeg.
	 * Set *result to non-zero to indicate an error on write.
	 */
	void (*written)(VipsImage *image, int *result, void *data);

	/* An image has been modified in some way and all caches
	 * need dropping.
	 */
	void (*invalidate)(VipsImage *image, void *data);

	/* Minimise this pipeline.
	 *
	 * This is triggered (sometimes) at the end of eval to signal that
	 * we're probably done and that operations involved should try to
	 * minimise memory use by, for example, dropping caches.
	 *
	 * See vips_tilecache().
	 */
	void (*minimise)(VipsImage *image, void *data);

} VipsImageClass;

/* Don't put spaces around void here, it breaks gtk-doc.
 */
VIPS_API
GType vips_image_get_type(void);

/* Has to be guint64 and not size_t/off_t since we have to be able to address
 * huge images on platforms with 32-bit files.
 */

/* Pixel address calculation macros.
 */
#define VIPS_IMAGE_SIZEOF_ELEMENT(I) \
	(vips_format_sizeof_unsafe((I)->BandFmt))
#define VIPS_IMAGE_SIZEOF_PEL(I) \
	(VIPS_IMAGE_SIZEOF_ELEMENT(I) * (I)->Bands)
#define VIPS_IMAGE_SIZEOF_LINE(I) \
	(VIPS_IMAGE_SIZEOF_PEL(I) * (I)->Xsize)
#define VIPS_IMAGE_SIZEOF_IMAGE(I) \
	(VIPS_IMAGE_SIZEOF_LINE(I) * (I)->Ysize)
#define VIPS_IMAGE_N_ELEMENTS(I) \
	((I)->Bands * (I)->Xsize)
#define VIPS_IMAGE_N_PELS(I) \
	((guint64) (I)->Xsize * (I)->Ysize)

/* If VIPS_DEBUG is defined, add bounds checking.
 */
#ifdef VIPS_DEBUG
#define VIPS_IMAGE_ADDR(I, X, Y) \
	(((X) >= 0 && (X) < VIPS_IMAGE(I)->Xsize && \
		 (Y) >= 0 && (Y) < VIPS_IMAGE(I)->Ysize && \
		 VIPS_IMAGE(I)->data) \
			? (VIPS_IMAGE(I)->data + \
				  (Y) *VIPS_IMAGE_SIZEOF_LINE(I) + \
				  (X) *VIPS_IMAGE_SIZEOF_PEL(I)) \
			: (fprintf(stderr, \
				   "VIPS_IMAGE_ADDR: point out of bounds, " \
				   "file \"%s\", line %d\n" \
				   "(point x=%d, y=%d\n" \
				   " should have been within VipsRect left=%d, top=%d, " \
				   "width=%d, height=%d)\n", \
				   __FILE__, __LINE__, \
				   (X), (Y), \
				   0, 0, \
				   VIPS_IMAGE(I)->Xsize, \
				   VIPS_IMAGE(I)->Ysize), \
				  (VipsPel *) NULL))
#else /*!VIPS_DEBUG*/
#define VIPS_IMAGE_ADDR(I, X, Y) \
	((I)->data + \
		(Y) *VIPS_IMAGE_SIZEOF_LINE(I) + \
		(X) *VIPS_IMAGE_SIZEOF_PEL(I))
#endif /*VIPS_DEBUG*/

#ifdef VIPS_DEBUG
#define VIPS_MATRIX(I, X, Y) \
	((VIPS_IMAGE(I)->BandFmt == VIPS_FORMAT_DOUBLE && \
		 VIPS_IMAGE(I)->Bands == 1) \
			? ((double *) VIPS_IMAGE_ADDR(I, X, Y)) \
			: (fprintf(stderr, "VIPS_MATRIX: not a matrix image\n"), \
				  (double *) NULL))
#else /*!VIPS_DEBUG*/
#define VIPS_MATRIX(I, X, Y) \
	((double *) VIPS_IMAGE_ADDR(I, X, Y))
#endif /*VIPS_DEBUG*/

VIPS_API
void vips_progress_set(gboolean progress);

VIPS_API
void vips_image_invalidate_all(VipsImage *image);

VIPS_API
void vips_image_minimise_all(VipsImage *image);

VIPS_API
gboolean vips_image_is_sequential(VipsImage *image);

VIPS_API
void vips_image_set_progress(VipsImage *image, gboolean progress);
VIPS_API
gboolean vips_image_iskilled(VipsImage *image);
VIPS_API
void vips_image_set_kill(VipsImage *image, gboolean kill);

VIPS_API
char *vips_filename_get_filename(const char *vips_filename);
VIPS_API
char *vips_filename_get_options(const char *vips_filename);

VIPS_API
VipsImage *vips_image_new(void);
VIPS_API
VipsImage *vips_image_new_memory(void);
VIPS_API
VipsImage *vips_image_memory(void);
VIPS_API
VipsImage *vips_image_new_from_file(const char *name, ...)
	G_GNUC_NULL_TERMINATED;
VIPS_API
VipsImage *vips_image_new_from_file_RW(const char *filename);
VIPS_API
VipsImage *vips_image_new_from_file_raw(const char *filename,
	int xsize, int ysize, int bands, guint64 offset);
VIPS_API
VipsImage *vips_image_new_from_memory(const void *data, size_t size,
	int width, int height, int bands, VipsBandFormat format);
VIPS_API
VipsImage *vips_image_new_from_memory_copy(const void *data, size_t size,
	int width, int height, int bands, VipsBandFormat format);
VIPS_API
VipsImage *vips_image_new_from_buffer(const void *buf, size_t len,
	const char *option_string, ...)
	G_GNUC_NULL_TERMINATED;
VIPS_API
VipsImage *vips_image_new_from_source(VipsSource *source,
	const char *option_string, ...) G_GNUC_NULL_TERMINATED;
VIPS_API
VipsImage *vips_image_new_matrix(int width, int height);
VIPS_API
VipsImage *vips_image_new_matrixv(int width, int height, ...);
VIPS_API
VipsImage *vips_image_new_matrix_from_array(int width, int height,
	const double *array, int size);
VIPS_API
VipsImage *vips_image_matrix_from_array(int width, int height,
	const double *array, int size);
VIPS_API
VipsImage *vips_image_new_from_image(VipsImage *image,
	const double *c, int n);
VIPS_API
VipsImage *vips_image_new_from_image1(VipsImage *image, double c);

VIPS_API
void vips_image_set_delete_on_close(VipsImage *image,
	gboolean delete_on_close);
VIPS_API
guint64 vips_get_disc_threshold(void);
VIPS_API
VipsImage *vips_image_new_temp_file(const char *format);

VIPS_API
int vips_image_write(VipsImage *image, VipsImage *out);
VIPS_API
int vips_image_write_to_file(VipsImage *image, const char *name, ...)
	G_GNUC_NULL_TERMINATED;
VIPS_API
int vips_image_write_to_buffer(VipsImage *in,
	const char *suffix, void **buf, size_t *size, ...)
	G_GNUC_NULL_TERMINATED;
VIPS_API
int vips_image_write_to_target(VipsImage *in,
	const char *suffix, VipsTarget *target, ...)
	G_GNUC_NULL_TERMINATED;
VIPS_API
void *vips_image_write_to_memory(VipsImage *in, size_t *size);

VIPS_API
int vips_image_decode_predict(VipsImage *in,
	int *bands, VipsBandFormat *format);
VIPS_API
int vips_image_decode(VipsImage *in, VipsImage **out);
VIPS_API
int vips_image_encode(VipsImage *in, VipsImage **out, VipsCoding coding);

VIPS_API
gboolean vips_image_isMSBfirst(VipsImage *image);
VIPS_API
gboolean vips_image_isfile(VipsImage *image);
VIPS_API
gboolean vips_image_ispartial(VipsImage *image);
VIPS_API
gboolean vips_image_hasalpha(VipsImage *image);

VIPS_API
VipsImage *vips_image_copy_memory(VipsImage *image);
VIPS_API
int vips_image_wio_input(VipsImage *image);
VIPS_API
int vips_image_pio_input(VipsImage *image);
VIPS_API
int vips_image_pio_output(VipsImage *image);
VIPS_API
int vips_image_inplace(VipsImage *image);
VIPS_API
int vips_image_write_prepare(VipsImage *image);

VIPS_API
int vips_image_write_line(VipsImage *image, int ypos, VipsPel *linebuffer);

VIPS_API
gboolean vips_band_format_isint(VipsBandFormat format);
VIPS_API
gboolean vips_band_format_isuint(VipsBandFormat format);
VIPS_API
gboolean vips_band_format_is8bit(VipsBandFormat format);
VIPS_API
gboolean vips_band_format_isfloat(VipsBandFormat format);
VIPS_API
gboolean vips_band_format_iscomplex(VipsBandFormat format);

VIPS_API
int vips_system(const char *cmd_format, ...)
	G_GNUC_NULL_TERMINATED;

/* Defined in type.c but declared here, since they use VipsImage.
 */
VIPS_API
VipsArrayImage *vips_array_image_new(VipsImage **array, int n);
VIPS_API
VipsArrayImage *vips_array_image_newv(int n, ...);
VIPS_API
VipsArrayImage *vips_array_image_new_from_string(const char *string,
	VipsAccess flags);
VIPS_API
VipsArrayImage *vips_array_image_empty(void);
VIPS_API
VipsArrayImage *vips_array_image_append(VipsArrayImage *array,
	VipsImage *image);
VIPS_API
VipsImage **vips_array_image_get(VipsArrayImage *array, int *n);
VIPS_API
VipsImage **vips_value_get_array_image(const GValue *value, int *n);
VIPS_API
void vips_value_set_array_image(GValue *value, int n);

/* Defined in reorder.c, but really a function on image.
 */
VIPS_API
int vips_reorder_prepare_many(VipsImage *image,
	VipsRegion **regions, VipsRect *r);
VIPS_API
void vips_reorder_margin_hint(VipsImage *image, int margin);

VIPS_API
void vips_image_free_buffer(VipsImage *image, void *buffer);

#ifdef __cplusplus
}
#endif /*__cplusplus*/

#endif /*VIPS_IMAGE_H*/
