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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_PIXBUF_H__
#define __ART_PIXBUF_H__
/* A generic data structure for holding a buffer of pixels. One way
to think about this module is as a virtualization over specific
pixel buffer formats. */
#ifdef LIBART_COMPILATION
#include "art_config.h"
#include "art_misc.h"
#else
#include <libart_lgpl/art_config.h>
#include <libart_lgpl/art_misc.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
typedef void (*ArtDestroyNotify) (void *func_data, void *data);
typedef struct _ArtPixBuf ArtPixBuf;
typedef enum {
ART_PIX_RGB
/* gray, cmyk, lab, ... ? */
} ArtPixFormat;
/* The pixel buffer consists of width * height pixels, each of which
has n_channels samples. It is stored in simple packed format. */
struct _ArtPixBuf {
/*< public >*/
ArtPixFormat format;
int n_channels;
int has_alpha;
int bits_per_sample;
art_u8 *pixels;
int width;
int height;
int rowstride;
void *destroy_data;
ArtDestroyNotify destroy;
};
/* allocate an ArtPixBuf from art_alloc()ed pixels (automated destruction) */
LIBART_EXPORT ArtPixBuf *
art_pixbuf_new_rgb (art_u8 *pixels, int width, int height, int rowstride);
LIBART_EXPORT ArtPixBuf *
art_pixbuf_new_rgba (art_u8 *pixels, int width, int height, int rowstride);
/* allocate an ArtPixBuf from constant pixels (no destruction) */
LIBART_EXPORT ArtPixBuf *
art_pixbuf_new_const_rgb (const art_u8 *pixels, int width, int height, int rowstride);
LIBART_EXPORT ArtPixBuf *
art_pixbuf_new_const_rgba (const art_u8 *pixels, int width, int height, int rowstride);
/* allocate an ArtPixBuf and notify creator upon destruction */
LIBART_EXPORT ArtPixBuf *
art_pixbuf_new_rgb_dnotify (art_u8 *pixels, int width, int height, int rowstride,
void *dfunc_data, ArtDestroyNotify dfunc);
LIBART_EXPORT ArtPixBuf *
art_pixbuf_new_rgba_dnotify (art_u8 *pixels, int width, int height, int rowstride,
void *dfunc_data, ArtDestroyNotify dfunc);
/* free an ArtPixBuf with destroy notification */
LIBART_EXPORT void
art_pixbuf_free (ArtPixBuf *pixbuf);
/* deprecated function, use the _dnotify variants for allocation instead */
LIBART_EXPORT void
art_pixbuf_free_shallow (ArtPixBuf *pixbuf);
LIBART_EXPORT ArtPixBuf *
art_pixbuf_duplicate (const ArtPixBuf *pixbuf);
#ifdef __cplusplus
}
#endif
#endif
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