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/* Generic functions and macros for reading XCF files
*
* This file was written by Henning Makholm <henning@makholm.net>
* It is hereby in the public domain.
*
* In jurisdictions that do not recognise grants of copyright to the
* public domain: I, the author and (presumably, in those jurisdictions)
* copyright holder, hereby permit anyone to distribute and use this code,
* in source code or binary form, with or without modifications. This
* permission is world-wide and irrevocable.
*
* Of course, I will not be liable for any errors or shortcomings in the
* code, since I give it away without asking any compenstations.
*
* If you use or distribute this code, I would appreciate receiving
* credit for writing it, in whichever way you find proper and customary.
*/
#ifndef XCFTOOLS_H
#define XCFTOOLS_H
#include "config.h"
#include "enums.h"
#include <stddef.h>
#include <stdio.h>
#if defined(HAVE_GETTEXT) && defined(ENABLE_NLS)
#include <libintl.h>
#define _(s) gettext(s)
void nls_init(void);
#else
#define _(s) (s)
#define nls_init() (void)0
#endif
#define N_(s) (s)
#if HAVE_INTTYPES_H
# define __STDC_FORMAT_MACROS
# include <inttypes.h>
#else
/* These legacy fall-backs will probably work on every system
* that does not supply a inttypes.h ... */
typedef unsigned char uint8_t ;
typedef unsigned long int uint32_t, uintptr_t ;
typedef signed char int8_t ;
typedef signed long int int32_t ;
# define PRIX32 "lX"
# define PRIu32 "lu"
# define PRIXPTR "lX"
#endif
#if __GNUC__
# define __ATTRIBUTE__ __attribute__
#else
# define __ATTRIBUTE__(x)
#endif
#if HAVE_NETINET_IN_H
# include <netinet/in.h>
#elif HAVE_ARPA_INET_H
# include <arpa/inet.h>
#elif WORDS_BIGENDIAN
# define ntohl(x) (x)
#else
static inline uint32_t ntohl(uint32_t a) {
return (a << 24) + ((a & 0xFF00) << 8) + ((a >> 8) & 0xFF00) + (a >> 24) ;
}
#endif
#ifndef HAVE_STRCASECMP
#define strcasecmp strcmp
#endif
/* Read a single word value from the XCF file */
/* Use + instead of | because that allows LEA instructions */
#define xcfBE(a) ( ((uint32_t)xcf_file[(a) ] << 24) + \
((uint32_t)xcf_file[(a)+1] << 16) + \
((uint32_t)xcf_file[(a)+2] << 8 ) + \
((uint32_t)xcf_file[(a)+3] ) )
#define xcfLE(a) ( ((uint32_t)xcf_file[(a) ] ) + \
((uint32_t)xcf_file[(a)+1] << 8 ) + \
((uint32_t)xcf_file[(a)+2] << 16) + \
((uint32_t)xcf_file[(a)+3] << 24) )
#if CAN_DO_UNALIGNED_WORDS
# define xcfL(a) ntohl(*(uint32_t *)(xcf_file + (a)))
#else
# define xcfL(a) ((a) & 3 ? xcfBE(a) : ntohl(*(uint32_t *)(xcf_file + (a))))
#endif
/* ****************************************************************** */
/* The following are exported from am OS-specific source file;
* io-unix.c on unixish systems.
*/
void read_or_mmap_xcf(const char* filename, const char *unzipper);
void free_or_close_xcf(void);
/* ****************************************************************** */
/* utils.c */
extern const char *progname ;
extern int verboseFlag ;
void *xcfmalloc(size_t size);
void xcffree(void*);
void FatalGeneric(int status,const char* format,...)
__ATTRIBUTE__((format(printf,2,3),noreturn)) ;
void FatalUnexpected(const char* format,...)
__ATTRIBUTE__((format(printf,1,2),noreturn)) ;
void FatalBadXCF(const char* format,...)
__ATTRIBUTE__((format(printf,1,2),noreturn)) ;
void FatalUnsupportedXCF(const char* format,...)
__ATTRIBUTE__((format(printf,1,2),noreturn)) ;
void gpl_blurb(void) __ATTRIBUTE__((noreturn));
FILE* openout(const char*);
void closeout(FILE *,const char*);
struct rect {
int t, b, l, r ;
};
#define isSubrect(A,B) \
((A).l >= (B).l && (A).r <= (B).r && (A).t >= (B).t && (A).b <= (B).b)
#define disjointRects(A,B) \
((A).l >= (B).r || (A).r <= (B).l || (A).t >= (B).b || (A).b <= (B).t)
/* ****************************************************************** */
/* xcf-general.c */
extern uint8_t *xcf_file ;
extern size_t xcf_length ;
extern int use_utf8 ;
void xcfCheckspace(uint32_t addr,int spaceafter, const char *format,...)
__ATTRIBUTE__((format(printf,3,4)));
uint32_t xcfOffset(uint32_t addr,int spaceafter);
int xcfNextprop(uint32_t *master,uint32_t *body);
const char* xcfString(uint32_t ptr,uint32_t *after);
/* These are hardcoded in the Gimp sources: */
#define TILE_SHIFT 6
#define TILE_WIDTH (1<<TILE_SHIFT)
#define TILE_HEIGHT (1<<TILE_SHIFT)
/* These definitions of TILE_LEFT and TILE_TOP work correctly for negative
* numbers, but on the other hand depend on TILE_WIDTH and TILE_HEIGHT
* being powers of 2. That's okay, because the tile size cannot change
* anyway.
*/
#define TILE_LEFT(x) ((x) & -TILE_WIDTH)
#define TILE_TOP(y) ((y) & -TILE_HEIGHT)
#define TILE_NUM(x) ((x) >> TILE_SHIFT)
struct tileDimensions {
struct rect c ;
unsigned width, height ;
unsigned tilesx, tilesy ;
unsigned ntiles ;
};
/* computeDimensions assumes that width, height, c.l, and c.t are set */
void computeDimensions(struct tileDimensions *);
struct xcfTiles {
const struct _convertParams *params ;
uint32_t *tileptrs ;
uint32_t hierarchy ;
};
struct xcfLayer {
struct tileDimensions dim ;
const char *name ;
GimpLayerModeEffects mode ;
GimpImageType type ;
unsigned int opacity ;
int isVisible, hasMask ;
uint32_t propptr ;
struct xcfTiles pixels ;
struct xcfTiles mask ;
int isGroup ;
unsigned pathLength ;
unsigned *path ;
};
extern struct xcfImage {
int version ;
unsigned width, height ;
GimpImageBaseType type ;
XcfCompressionType compression ;
int numLayers ;
struct xcfLayer *layers ;
uint32_t colormapptr ;
} XCF ;
void getBasicXcfInfo(void);
#endif /* XCFTOOLS_H */
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