image.hh

#ifndef _IMAGE_HH_
#define _IMAGE_HH_

#include <stdint.h>

#define RGB_SIZE  3
#define RGBA_SIZE 4

enum _image_format{	IMAGE_DEFAULT = 0, \
					IMAGE_PPM, \
					IMAGE_LIBRARY, \
					IMAGE_FORMAT_MAX \
				};

enum _image_model{	IMAGE_RGB, \
					IMAGE_RGBA, \
					IMAGE_MODEL_MAX
				};

typedef struct _image_ctx{
	size_t width;
	size_t height;
	int model;
	int format;
	uint8_t *canvas;
	uint8_t *next_pixel;
	uint32_t initialized;
	char *extension;
	void *_dt;
} image_ctx_t, *pimage_ctx_t;

typedef int _init(image_ctx_t*);
typedef int _add_pixel(image_ctx_t*,const uint8_t,const uint8_t,const uint8_t,const uint8_t);
typedef int _set_pixel(image_ctx_t*,const size_t,const size_t,const uint8_t,const uint8_t,const uint8_t,const uint8_t);
typedef int _get_pixel(image_ctx_t*,const size_t,const size_t,const uint8_t*,const uint8_t*,const uint8_t*,const uint8_t*);
typedef int _write(image_ctx_t*,FILE*);
typedef void _free(image_ctx_t*);

typedef struct _image_dispatch_table{
	_init		*init;
	_add_pixel	*add_pixel;
	_set_pixel	*set_pixel;
	_get_pixel	*get_pixel;
	_write		*write;
	_free		*free;
} image_dispatch_table_t;

int image_set_format(int);
int image_init(image_ctx_t*, const size_t, const size_t, const int, const int);
int image_add_pixel(image_ctx_t* ctx, const uint8_t, const uint8_t, const uint8_t, const uint8_t);
int image_set_pixel(image_ctx_t* ctx, const size_t, const size_t, const uint8_t, const uint8_t, const uint8_t, const uint8_t);
int image_get_pixel(image_ctx_t* ctx,const size_t,const size_t, uint8_t const*, uint8_t const*, uint8_t const*, uint8_t const*);
int image_get_filename(image_ctx_t*, char*, size_t, char*);
int image_write(image_ctx_t*, FILE*);
void image_free(image_ctx_t*);
int image_set_library(char*);

#define ADD_PIXEL(ctx,r,g,b) image_add_pixel((ctx),(r),(g),(b),0xff)
#define ADD_PIXELA(ctx,r,g,b,a) image_add_pixel((ctx),(r),(g),(b),(a))

#define PIXEL_OFFSET(x,y,width,pixel_size) (((x) * (pixel_size)) + ((width) * (pixel_size) * (y)))

#endif