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#ifndef CRIMP_io_bmp_H
#define CRIMP_io_bmp_H
/*
* CRIMP :: BMP helper dclarations. INTERNAL. Do not export.
* Copyright (c) 1997-2003 Jan Nijtmans <nijtmans@users.sourceforge.net>
* Copyright (c) 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
*/
#include <crimp_core/crimp_coreDecls.h>
/* Compression types */
#define BI_RGB 0
#define BI_RLE8 1
#define BI_RLE4 2
#define BI_BITFIELDS 3
extern int
bmp_read_header (crimp_buffer* buf,
int* w, int* h,
unsigned char **colorMap,
int* numBits, int* numCols, int* comp,
unsigned int* mask);
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#ifndef CRIMP_io_bmp_H
#define CRIMP_io_bmp_H
/*
* CRIMP :: BMP helper dclarations. INTERNAL. Do not export.
* Copyright (c) 1997-2003 Jan Nijtmans <nijtmans@users.sourceforge.net>
* Copyright (c) 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
*/
#include <crimp_core/crimp_coreDecls.h>
/* Structure for reading bit masks for compression type BI_BITFIELDS */
typedef struct {
unsigned int mask;
unsigned int shiftin;
unsigned int shiftout;
} BitmapChannel;
/*
* Compression types
*/
typedef enum {
bc_rgb, /* Uncompressed pixels */
bc_rle4, /* RLE-encoding for 4 bits/pixel */
bc_rle8, /* RLE-encoding for 8 bits/pixel */
bc_bitfield, /* Packed RGB (or 1d huffman) */
bc_jpeg, /* Embedded JPEG, or RLE-24 -- NOT SUPPORTED */
bc_png, /* Embedded PNG -- NOT SUPPORTED */
bc_alphabit /* -- NOT SUPPORTED */
} bmp_compression;
/*
* bmp decoder information.
*/
typdef struct bmp_info {
unsigned int w; /* Image width */
unsigned int h; /* Image height */
unsigned char* colorMap; /* Palette, NULL if not used */
unsigned int numColors; /* #colors in the palette */
unsigned int numBits; /* bits/pixel */
bmp_compression mode; /* Pixel compression method, s.a. */
int topdown; /* Direction of scan-line storage */
unsigned int numPixelBytes; /* #bytes of pixel data */
crimp_buffer* input; /* buffer holding the BMP */
} bmp_info;
/*
* Main functions.
*/
extern int
bmp_read_header (Tcl_Interp* interp,
crimp_buffer* buf,
bmp_info* info);
extern void
bmp_read_pixels (bmp_info* info,
crimp_image* destination);
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
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