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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2006 Richard Wilson <info@tinct.net>
*/
/** \file
* BMP file decoding (interface).
*/
#ifndef _NETSURF_IMAGE_BMPREAD_H_
#define _NETSURF_IMAGE_BMPREAD_H_
#include <stdbool.h>
#include "netsurf/image/bitmap.h"
/* error return values */
typedef enum {
BMP_OK = 0,
BMP_INSUFFICIENT_MEMORY = 1,
BMP_INSUFFICIENT_DATA = 2,
BMP_DATA_ERROR = 3
} bmp_result;
/* encoding types */
typedef enum {
BMP_ENCODING_RGB = 0,
BMP_ENCODING_RLE8 = 1,
BMP_ENCODING_RLE4 = 2,
BMP_ENCODING_BITFIELDS = 3
} bmp_encoding;
struct bmp_image {
unsigned char *bmp_data; /** pointer to BMP data */
unsigned int buffer_size; /** total number of bytes of BMP data available */
unsigned int width; /** width of BMP (valid after _analyse) */
unsigned int height; /** heigth of BMP (valid after _analyse) */
bmp_encoding encoding; /** pixel encoding type */
unsigned int bitmap_offset; /** offset of bitmap data */
unsigned int bpp; /** bits per pixel */
unsigned int colours; /** number of colours */
unsigned int *colour_table; /** colour table */
bool reversed; /** scanlines are top to bottom */
bool decoded; /** whether the image has been decoded */
struct bitmap *bitmap; /** decoded image */
};
bmp_result bmp_analyse(struct bmp_image *bmp);
bmp_result bmp_decode(struct bmp_image *bmp);
void bmp_finalise(struct bmp_image *bmp);
#endif
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