mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-24 15:29:45 +03:00
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*
|
|
* This file is part of NetSurf, http://netsurf-browser.org/
|
|
* 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 */
|
|
bool ico; /** image is part of an ICO, mask follows */
|
|
unsigned int mask[4]; /** four bitwise mask */
|
|
int shift[4]; /** four bitwise shifts */
|
|
struct bitmap *bitmap; /** decoded image */
|
|
};
|
|
|
|
struct ico_image {
|
|
struct bmp_image bmp;
|
|
struct ico_image *next;
|
|
};
|
|
|
|
struct ico_collection {
|
|
unsigned char *ico_data; /** pointer to ICO data */
|
|
unsigned int buffer_size; /** total number of bytes of ICO data available */
|
|
unsigned int width; /** width of largest BMP */
|
|
unsigned int height; /** heigth of largest BMP */
|
|
struct ico_image *first;
|
|
};
|
|
|
|
bmp_result bmp_analyse(struct bmp_image *bmp);
|
|
bmp_result bmp_decode(struct bmp_image *bmp);
|
|
void bmp_finalise(struct bmp_image *bmp);
|
|
|
|
bmp_result ico_analyse(struct ico_collection *ico);
|
|
struct bmp_image *ico_find(struct ico_collection *ico, int width, int height);
|
|
void ico_finalise(struct ico_collection *ico);
|
|
|
|
#endif
|