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/* ilbm.h - header file for IFF ILBM files
*/
#define RowBytes(cols) ( ( ( (cols) + 15 ) / 16 ) * 2 )
/* definitions for BMHD */
typedef struct {
unsigned short w, h;
short x, y;
unsigned char nPlanes, masking, compression, pad1;
unsigned short transparentColor;
unsigned char xAspect, yAspect;
short pageWidth, pageHeight;
} BitMapHeader;
#define BitMapHeaderSize 20
#define mskNone 0
#define mskHasMask 1
#define mskHasTransparentColor 2
#define mskLasso 3
#define cmpNone 0
#define cmpByteRun1 1
#define cmpMAXKNOWN cmpByteRun1
static char * cmpNAME[] = { "none", "byterun1" };
/* definitions for CMAP */
#if 0 /* not used */
typedef struct {
unsigned char r, g, b;
} ColorRegister;
#endif
/* definitions for CAMG */
#define CAMGChunkSize 4
#define vmLACE 0x0004 /* not used */
#define vmEXTRA_HALFBRITE 0x0080
#define vmHAM 0x0800
#define vmHIRES 0x8000 /* not used */
#define HAMCODE_CMAP 0 /* look up color in colormap */
#define HAMCODE_BLUE 1 /* new blue component */
#define HAMCODE_RED 2 /* new red component */
#define HAMCODE_GREEN 3 /* new green component */
/* unofficial DCOL chunk for direct-color */
typedef struct {
unsigned char r, g, b, pad1;
} DirectColor;
#define DirectColorSize 4
/* multipalette PCHG chunk definitions */
/* get number of longwords in line mask from PCHG.LineCount */
#define MaskLongWords(x) (((x) + 31) / 32)
typedef struct {
unsigned short Compression;
unsigned short Flags;
short StartLine; /* may be negative */
unsigned short LineCount;
unsigned short ChangedLines;
unsigned short MinReg;
unsigned short MaxReg;
unsigned short MaxChanges;
unsigned long TotalChanges;
} PCHGHeader;
#define PCHGHeaderSize 20
/* Compression modes */
#define PCHG_COMP_NONE 0
#define PCHG_COMP_HUFFMAN 1
/* Flags */
#define PCHGF_12BIT (1 << 0) /* use SmallLineChanges */
#define PCHGF_32BIT (1 << 1) /* use BigLineChanges */
#define PCHGF_USE_ALPHA (1 << 2) /* meaningful only if PCHG_32BIT is on:
use the Alpha channel info */
typedef struct {
unsigned long CompInfoSize;
unsigned long OriginalDataSize;
} PCHGCompHeader;
#define PCHGCompHeaderSize 8
#if 0 /* not used */
typedef struct {
unsigned char ChangeCount16;
unsigned char ChangeCount32;
unsigned short *PaletteChange;
} SmallLineChanges;
typedef struct {
unsigned short Register;
unsigned char Alpha, Red, Blue, Green; /* ARBG, not ARGB */
} BigPaletteChange;
typedef struct {
unsigned short ChangeCount;
BigPaletteChange *PaletteChange;
} BigLineChanges;
#endif /* 0 */
/* the next three structures are used internally by ilbmtoppm
* The PCHG BigLineChanges and SmallLineChanges are converted
* to these structures
*/
typedef struct {
unsigned short Register;
pixval Alpha, Red, Green, Blue;
} PaletteChange;
typedef struct {
unsigned short Count;
PaletteChange *Palette;
} LineChanges;
typedef struct {
PCHGHeader *PCHG;
unsigned char *LineMask;
LineChanges *Change;
PaletteChange *Palette;
pixval maxval; /* maxval of colors in Palette */
pixel * colormap; /* original colormap */
int colors; /* colors in colormap */
} PCHGInfo;
/* other stuff */
#define ILBM_BIGRAW
#ifdef ILBM_BIGRAW
# define MAXPLANES 16
typedef unsigned short rawtype;
#else
# define MAXPLANES 8
typedef unsigned char rawtype;
#endif
#define MAXCMAPCOLORS (1 << MAXPLANES)
#define MAXCOLVAL 255 /* max value of color component */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.