/*
 * image.h -- Image structure manipulating library header
 * (C)Copyright 1999 by Hiroshi Takekawa
 * Last Modified: Mon Jun 26 18:31:52 2000.
 * $Id: image.h,v 1.6 2000/06/27 18:19:05 sian Exp $
 */

#ifndef _IMAGE_H_
#define _IMAGE_H_

#define CONNECT_RESIZE    1
#define CONNECT_VERTICAL  2

#define GRAVITY_MINUS     (-1)
#define GRAVITY_CENTER    0
#define GRAVITY_PLUS      1

/* 内部フォーマットを統一するためにmaskの方を固定する… */
/* _RGB15のbit mask */
#define RED_MASK15   0x7c00
#define GREEN_MASK15 0x03e0
#define BLUE_MASK15  0x001f

/* _RGB16のbit mask */
#define RED_MASK     0xf800
#define GREEN_MASK   0x07e0
#define BLUE_MASK    0x001f

typedef enum {
  _UNKNOWN,
  _MONO,
  _GRAY,
  _INDEX,
  _RGB16,
  _RGB24,
  _RGB15 = 255 /* ugly... */
} ImageType;

typedef enum {
  _DONOTHING,
  _TRANSPARENT,
#ifdef SHAPE
  _SHAPE
#endif
} Transparent;

typedef enum {
  _NOTHING_DISPOSAL,
  _LEFTIMAGE,
  _RESTOREBACKGROUND,
  _RESTOREPREVIOUS
} Disposal;

typedef struct _color {
  int red;
  int green;
  int blue;
  int index;
} Color;

typedef struct _image Image;
struct _image {
  int left, top;
  int width, height;
  int ncolors;
  Transparent transparent_disposal;
  Disposal image_disposal;
  Color transparent;
  Color background;
  int delay;
  unsigned char colormap[256][3];
  int image_size;
  int bytes_per_line;
  ImageType type;
  unsigned char *image;
#ifdef SHAPE
  unsigned char *mask;
  int mask_size;
  Pixmap pixmask;
#endif
  Image *next;
};

#include "effect.h"

Image *image_allocate(void);
int image_calculate_bytes_per_line(int, ImageType);
Image *image_create(int, int, ImageType);
void image_destroy(Image *);
Image *image_duplicate(Image *);
int image_expand(Image *, ImageType);
void image_expand_auto(Image *, int);
int image_reduce(Image *, ImageType);
int image_magnify_generic(Image *, int, int, Interpolate_method);
int image_magnify(Image *, double, Interpolate_method);
int image_flip_vertical(Image *p);
int image_flip_horizontal(Image *p);
void image_copy_sub(Image *, Image *, int, int, int, int, int, int);
void image_copy(Image *, Image *, int, int);
Image *image_resize(Image *, int, int, int);
Image *image_connect(Image *, Image *, int);
#ifdef SHAPE
int image_create_mask(Image *);
#endif

#endif