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gbmxbm.c
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C/C++ Source or Header
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1993-09-12
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13KB
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541 lines
/*
GBMXBM.C X Windows Bitmap support
Reads and writes most X bitmaps
*/
/*...sincludes:0:*/
#include <stdio.h>
#include <ctype.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <malloc.h>
#ifdef AIX
#include <unistd.h>
#else
#include <io.h>
#endif
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "standard.h"
#include "gbm.h"
/*...vgbm\46\h:0:*/
/*...e*/
static GBMFT xbm_gbmft =
{
"XBitmap",
"X Windows Bitmap",
"XBM",
GBM_FT_R1|
GBM_FT_W1,
};
#define GBM_ERR_XBM_EXP_ID ((GBM_ERR) 1300)
#define GBM_ERR_XBM_UNEXP_EOF ((GBM_ERR) 1301)
#define GBM_ERR_XBM_EXP_CHAR ((GBM_ERR) 1302)
#define GBM_ERR_XBM_EXP_LSQR ((GBM_ERR) 1303)
#define GBM_ERR_XBM_EXP_RSQR ((GBM_ERR) 1304)
#define GBM_ERR_XBM_EXP_EQUALS ((GBM_ERR) 1305)
#define GBM_ERR_XBM_EXP_LCUR ((GBM_ERR) 1306)
#define GBM_ERR_XBM_EXP_RCUR ((GBM_ERR) 1307)
#define GBM_ERR_XBM_EXP_COMMA ((GBM_ERR) 1308)
#define GBM_ERR_XBM_EXP_NUMBER ((GBM_ERR) 1309)
#define GBM_ERR_XBM_EXP_SEMI ((GBM_ERR) 1310)
#define MAX_BUF 1024
#define MAX_ID 100
typedef struct
{
int fd;
int inx, cnt;
byte buf [MAX_BUF];
byte id [MAX_ID+1];
int number;
int size;
} XBM_PRIV;
/*...srev:0:*/
static byte rev [0x100] =
{
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
};
/*...e*/
/*...sbuffered text read:0:*/
static int nextbuf(XBM_PRIV *xbm_priv)
{
int cnt;
if ( (cnt = read(xbm_priv -> fd, xbm_priv -> buf, MAX_BUF)) <= 0 )
return ( -1 );
xbm_priv -> cnt = cnt;
xbm_priv -> inx = 1;
return ( xbm_priv -> buf [0] );
}
#define nextchar(x) ( ((x)->inx<(x)->cnt) ? \
(int) (unsigned int) ((x)->buf[((x)->inx)++]) : nextbuf(x) )
static void pushchar(XBM_PRIV *xbm_priv, int c)
{
if ( c != -1 )
xbm_priv -> buf [--(xbm_priv -> inx)] = (byte) c;
}
typedef byte SYM;
#define S_DEFINE ((SYM) 1)
#define S_ID ((SYM) 2)
#define S_NUMBER ((SYM) 3)
#define S_STATIC ((SYM) 4)
#define S_CHAR ((SYM) 5)
#define S_SHORT ((SYM) 6)
#define S_LSQR ((SYM) 7)
#define S_RSQR ((SYM) 8)
#define S_LCUR ((SYM) 9)
#define S_RCUR ((SYM) 10)
#define S_COMMA ((SYM) 11)
#define S_SEMI ((SYM) 12)
#define S_EQUALS ((SYM) 13)
#define S_EOF ((SYM) 14)
#define S_ERROR_COMMENT ((SYM) 15)
#define S_ERROR_ID ((SYM) 16)
#define S_ERROR_MINUS ((SYM) 17)
#define S_ERROR_NUMBER ((SYM) 18)
static int valof(char c)
{
if ( c >= 'a' && c <= 'f' )
return ( c - 'a' + 10 );
if ( c >= 'A' && c <= 'F' )
return ( c - 'A' + 10 );
return ( c - '0' );
}
static SYM nextsym(XBM_PRIV *xbm_priv)
{
int c, i, sign = 1;
for ( ;; )
{
while ( (c = nextchar(xbm_priv)) != -1 && isspace(c) )
;
if ( c == -1 )
return ( S_EOF );
if ( c != '/' )
break;
if ( (c = nextchar(xbm_priv)) != '*' )
return ( S_ERROR_COMMENT );
if ( (c = nextchar(xbm_priv)) == -1 )
return ( S_EOF );
do
while ( c != '*' )
if ( (c = nextchar(xbm_priv)) == -1 )
return ( S_EOF );
while ( (c = nextchar(xbm_priv)) != -1 && c != '/' );
if ( c == -1 )
return ( S_EOF );
}
switch ( c )
{
case '[': return ( S_LSQR );
case ']': return ( S_RSQR );
case '{': return ( S_LCUR );
case '}': return ( S_RCUR );
case ',': return ( S_COMMA );
case ';': return ( S_SEMI );
case '=': return ( S_EQUALS );
}
if ( isdigit(c) || c == '-' )
{
if ( c == '-' )
{
sign = -1;
if ( (c = nextchar(xbm_priv)) == -1 )
return ( S_ERROR_MINUS );
if ( !isdigit(c) )
return ( S_ERROR_NUMBER );
}
if ( c == '0' )
{
xbm_priv -> number = 0;
if ( (c = nextchar(xbm_priv)) == 'x' || c == 'X' )
/* Hex number */
{
while ( (c = nextchar(xbm_priv)) != -1 && isxdigit(c) )
{
xbm_priv -> number <<= 4;
xbm_priv -> number += valof(c);
}
}
else
/* Octal number */
while ( c != -1 && c >= '0' && c <= '7' )
{
xbm_priv -> number <<= 3;
xbm_priv -> number += ( c - '0' );
c = nextchar(xbm_priv);
}
}
else
{
xbm_priv -> number = ( c - '0' );
while ( (c = nextchar(xbm_priv)) != -1 && isdigit(c) )
{
xbm_priv -> number *= 10;
xbm_priv -> number += ( c - '0' );
}
}
xbm_priv -> number *= sign;
pushchar(xbm_priv, c);
return ( S_NUMBER );
}
i = 0;
do
xbm_priv -> id [i++] = c;
while ( (c = nextchar(xbm_priv)) != -1 && (isalnum(c) || c == '_') && i < MAX_ID );
xbm_priv -> id [i] = '\0';
pushchar(xbm_priv, c);
if ( !strcmp(xbm_priv -> id, "#define") ) return ( S_DEFINE );
if ( !strcmp(xbm_priv -> id, "static" ) ) return ( S_STATIC );
if ( !strcmp(xbm_priv -> id, "char" ) ) return ( S_CHAR );
if ( !strcmp(xbm_priv -> id, "short" ) ) return ( S_SHORT );
if ( !isalnum(xbm_priv -> id [0]) )
return ( S_ERROR_ID );
return ( S_ID );
}
/*...e*/
/*...sxbm_qft:0:*/
GBM_ERR xbm_qft(GBMFT *gbmft)
{
*gbmft = xbm_gbmft;
return ( GBM_ERR_OK );
}
/*...e*/
/*...sxbm_rhdr:0:*/
GBM_ERR xbm_rhdr(char *fn, int fd, GBM *gbm, char *opt)
{
XBM_PRIV *xbm_priv = (XBM_PRIV *) gbm -> priv;
SYM sym;
fn=fn; opt=opt; /* Suppress 'unref arg' compiler warnings */
lseek(fd, 0L, SEEK_SET);
xbm_priv -> fd = fd;
xbm_priv -> inx = 0;
xbm_priv -> cnt = 0;
gbm -> w = -1;
gbm -> h = -1;
gbm -> bpp = 1;
while ( (sym = nextsym(xbm_priv)) == S_DEFINE )
{
char *p;
if ( (sym = nextsym(xbm_priv)) != S_ID )
return ( GBM_ERR_XBM_EXP_ID );
if ( (p = strrchr(xbm_priv -> id, '_')) != NULL )
p++;
else
p = (char *) (xbm_priv -> id);
if ( !strcmp(p, "width") )
{
if ( (sym = nextsym(xbm_priv)) != S_NUMBER )
return ( GBM_ERR_XBM_EXP_NUMBER );
gbm -> w = xbm_priv -> number;
}
else if ( !strcmp(p, "height") )
{
if ( (sym = nextsym(xbm_priv)) != S_NUMBER )
return ( GBM_ERR_XBM_EXP_NUMBER );
gbm -> h = xbm_priv -> number;
}
else
{
if ( (sym = nextsym(xbm_priv)) != S_NUMBER )
return ( GBM_ERR_XBM_EXP_NUMBER );
}
}
if ( gbm -> w == -1 || gbm -> h == -1 )
return ( GBM_ERR_BAD_SIZE );
if ( sym == S_STATIC )
sym = nextsym(xbm_priv);
if ( sym == S_EOF )
return ( GBM_ERR_XBM_UNEXP_EOF );
switch ( sym )
{
case S_CHAR:
xbm_priv -> size = 8;
break;
case S_SHORT:
xbm_priv -> size = 16;
break;
default:
return ( GBM_ERR_XBM_EXP_CHAR );
}
if ( nextsym(xbm_priv) != S_ID )
return ( GBM_ERR_XBM_EXP_ID );
if ( nextsym(xbm_priv) != S_LSQR )
return ( GBM_ERR_XBM_EXP_LSQR );
if ( nextsym(xbm_priv) != S_RSQR )
return ( GBM_ERR_XBM_EXP_RSQR );
if ( nextsym(xbm_priv) != S_EQUALS )
return ( GBM_ERR_XBM_EXP_EQUALS );
if ( nextsym(xbm_priv) != S_LCUR )
return ( GBM_ERR_XBM_EXP_LCUR );
return ( GBM_ERR_OK );
}
/*...e*/
/*...sxbm_rpal:0:*/
GBM_ERR xbm_rpal(int fd, GBM *gbm, GBMRGB *gbmrgb)
{
fd=fd; gbm=gbm; /* Suppress 'unref arg' compiler warnings */
gbmrgb [0].r = 0xff;
gbmrgb [0].g = 0xff;
gbmrgb [0].b = 0xff; /* White background */
gbmrgb [1].r = 0x00;
gbmrgb [1].g = 0x00;
gbmrgb [1].b = 0x00; /* Black background */
return ( GBM_ERR_OK );
}
/*...e*/
/*...sxbm_rdata:0:*/
GBM_ERR xbm_rdata(int fd, GBM *gbm, byte *data)
{
XBM_PRIV *xbm_priv = (XBM_PRIV *) gbm -> priv;
int stride = ( ( gbm -> w * gbm -> bpp + 31 ) / 32 ) * 4;
int x, y;
SYM sym;
BOOLEAN keep_going = TRUE;
fd=fd; /* Suppres 'unref arg' compiler warning */
memset(data, 0, gbm -> h * stride);
data += ( (gbm -> h - 1) * stride );
switch ( xbm_priv -> size )
{
/*...s8:16:*/
case 8:
for ( y = gbm -> h - 1; keep_going && y >= 0; y--, data -= stride )
for ( x = 0; keep_going && x < ((gbm -> w + 7) >> 3); x++ )
if ( (sym = nextsym(xbm_priv)) == S_RCUR )
keep_going = FALSE;
else if ( sym != S_NUMBER )
return ( GBM_ERR_XBM_EXP_NUMBER );
else
{
data [x] = rev [xbm_priv -> number];
sym = nextsym(xbm_priv);
if ( sym == S_RCUR )
keep_going = FALSE;
else if ( sym != S_COMMA )
return ( GBM_ERR_XBM_EXP_COMMA );
}
break;
/*...e*/
/*...s16:16:*/
case 16:
for ( y = gbm -> h - 1; keep_going && y >= 0; y--, data -= stride )
for ( x = 0; keep_going && x < ((gbm -> w + 15) >> 4); x++ )
if ( (sym = nextsym(xbm_priv)) == S_RCUR )
keep_going = FALSE;
else if ( sym != S_NUMBER )
return ( GBM_ERR_XBM_EXP_NUMBER );
else
{
data [x * 2 ] = rev [xbm_priv -> number & 0xff];
data [x * 2 + 1] = rev [xbm_priv -> number >> 8 ];
sym = nextsym(xbm_priv);
if ( sym == S_RCUR )
keep_going = FALSE;
else if ( sym != S_COMMA )
return ( GBM_ERR_XBM_EXP_COMMA );
}
break;
/*...e*/
}
if ( keep_going )
if ( nextsym(xbm_priv) != S_RCUR )
return ( GBM_ERR_XBM_EXP_RCUR );
if ( nextsym(xbm_priv) != S_SEMI )
return ( GBM_ERR_XBM_EXP_SEMI );
return ( GBM_ERR_OK );
}
/*...e*/
/*...sxbm_w:0:*/
/*
Write darkest colour as 1s, lightest colour with 0s.
*/
GBM_ERR xbm_w(char *fn, int fd, GBM *gbm, GBMRGB *gbmrgb, byte *data, char *opt)
{
int stride = ((gbm -> w * gbm -> bpp + 31) / 32) * 4;
int x, y, col = 0;
char s [100+1], name [100+1], *dot, *p;
int k0, k1, xor;
opt=opt; /* Suppress 'unref arg' compiler warning */
/* Normally palette entry 0 brightest is usual */
/* If not reverse all the bits */
k0 = gbmrgb [0].r * 77 + gbmrgb [0].g * 151 + gbmrgb [0].b * 28;
k1 = gbmrgb [1].r * 77 + gbmrgb [1].g * 151 + gbmrgb [1].b * 28;
xor = ( k0 > k1 ) ? 0 : 0xff;
/* Make the name from the filename, without the extension */
strncpy(name, fn, 100);
if ( (dot = strrchr(name, '.')) != NULL )
*dot = '\0';
/* Nobble any potentially nasty characters */
if ( !isalpha(*name) )
*name = '_';
for ( p = name + 1; *p; p++ )
if ( !isalnum(*p) )
*p = '_';
sprintf(s, "#define %s_width %d\r\n" , name, gbm -> w);
if ( write(fd, s, strlen(s)) != strlen(s) )
return ( GBM_ERR_WRITE );
sprintf(s, "#define %s_height %d\r\n", name, gbm -> h);
if ( write(fd, s, strlen(s)) != strlen(s) )
return ( GBM_ERR_WRITE );
sprintf(s, "static char %s_bits[] = {\r\n", name);
if ( write(fd, s, strlen(s)) != strlen(s) )
return ( GBM_ERR_WRITE );
data += (gbm -> h - 1) * stride;
for ( y = gbm -> h - 1; y >= 0; y--, data -= stride )
for ( x = 0; x < ((gbm -> w + 7) >> 3); x++ )
{
sprintf(s, "0x%02x,", rev [data [x]] ^ xor);
col += 5;
if ( col > 70 )
{
strcat(s, "\r\n");
col = 0;
}
if ( write(fd, s, strlen(s)) != strlen(s) )
return ( GBM_ERR_WRITE );
}
if ( col )
{
if ( write(fd, "\r\n", 2) != 2 )
return ( GBM_ERR_WRITE );
}
if ( write(fd, "};\r\n", 4) != 4 )
return ( GBM_ERR_WRITE );
return ( GBM_ERR_OK );
}
/*...e*/
/*...sxbm_err:0:*/
char *xbm_err(GBM_ERR rc)
{
switch ( (int) rc )
{
case GBM_ERR_XBM_EXP_ID:
return ( "expected identifier" );
case GBM_ERR_XBM_UNEXP_EOF:
return ( "unexpected end of file" );
case GBM_ERR_XBM_EXP_CHAR:
return ( "expected char or short" );
case GBM_ERR_XBM_EXP_LSQR:
return ( "expected [" );
case GBM_ERR_XBM_EXP_RSQR:
return ( "expected ]" );
case GBM_ERR_XBM_EXP_EQUALS:
return ( "expected =" );
case GBM_ERR_XBM_EXP_LCUR:
return ( "expected {" );
case GBM_ERR_XBM_EXP_RCUR:
return ( "expected }" );
case GBM_ERR_XBM_EXP_COMMA:
return ( "expected ," );
case GBM_ERR_XBM_EXP_NUMBER:
return ( "expected number" );
case GBM_ERR_XBM_EXP_SEMI:
return ( "expected ;" );
}
return ( NULL );
}
/*...e*/