diff options
Diffstat (limited to 'nx-X11/lib/Xmu/RdBitF.c')
| -rw-r--r-- | nx-X11/lib/Xmu/RdBitF.c | 401 |
1 files changed, 401 insertions, 0 deletions
diff --git a/nx-X11/lib/Xmu/RdBitF.c b/nx-X11/lib/Xmu/RdBitF.c new file mode 100644 index 000000000..eb5fe598d --- /dev/null +++ b/nx-X11/lib/Xmu/RdBitF.c @@ -0,0 +1,401 @@ +/* $Xorg: RdBitF.c,v 1.4 2001/02/09 02:03:53 xorgcvs Exp $ */ + +/* + +Copyright 1988, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +*/ +/* $XFree86: xc/lib/Xmu/RdBitF.c,v 3.12 2001/12/14 19:55:48 dawes Exp $ */ + +/* + * This file contains miscellaneous utility routines and is not part of the + * Xlib standard. + * + * Public entry points: + * + * XmuReadBitmapData read data from FILE descriptor + * XmuReadBitmapDataFromFile read X10 or X11 format bitmap files + * and return data + * + * Note that this file and ../X/XRdBitF.c look very similar.... Keep them + * that way (but don't use common source code so that people can have one + * without the other). + */ + + +/* + * Based on an optimized version provided by Jim Becker, Auguest 5, 1988. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <X11/Xos.h> +#include <X11/Xlib.h> +#include <X11/Xutil.h> +#include <X11/Xlibint.h> +#include <stdio.h> +#include <ctype.h> +#include <X11/Xmu/Drawing.h> + +#define MAX_SIZE 255 + +/* + * Prototypes + */ +static void initHexTable(void); +static int NextInt(FILE*); + +/* shared data for the image read/parse logic */ +static short hexTable[256]; /* conversion value */ +static Bool initialized = False; /* easier to fill in at run time */ + + +/* + * Table index for the hex values. Initialized once, first time. + * Used for translation value or delimiter significance lookup. + */ +static void +initHexTable(void) +{ + /* + * We build the table at run time for several reasons: + * + * 1. portable to non-ASCII machines. + * 2. still reentrant since we set the init flag after setting table. + * 3. easier to extend. + * 4. less prone to bugs. + */ + hexTable['0'] = 0; hexTable['1'] = 1; + hexTable['2'] = 2; hexTable['3'] = 3; + hexTable['4'] = 4; hexTable['5'] = 5; + hexTable['6'] = 6; hexTable['7'] = 7; + hexTable['8'] = 8; hexTable['9'] = 9; + hexTable['A'] = 10; hexTable['B'] = 11; + hexTable['C'] = 12; hexTable['D'] = 13; + hexTable['E'] = 14; hexTable['F'] = 15; + hexTable['a'] = 10; hexTable['b'] = 11; + hexTable['c'] = 12; hexTable['d'] = 13; + hexTable['e'] = 14; hexTable['f'] = 15; + + /* delimiters of significance are flagged w/ negative value */ + hexTable[' '] = -1; hexTable[','] = -1; + hexTable['}'] = -1; hexTable['\n'] = -1; + hexTable['\t'] = -1; + + initialized = True; +} + +/* + * read next hex value in the input stream, return -1 if EOF + */ +static int +NextInt(FILE *fstream) +{ + int ch; + int value = 0; + int gotone = 0; + int done = 0; + + /* loop, accumulate hex value until find delimiter */ + /* skip any initial delimiters found in read stream */ + + while (!done) { + ch = getc(fstream); + if (ch == EOF) { + value = -1; + done++; + } else { + /* trim high bits, check type and accumulate */ + ch &= 0xff; + if (isascii(ch) && isxdigit(ch)) { + value = (value << 4) + hexTable[ch]; + gotone++; + } else if ((hexTable[ch]) < 0 && gotone) + done++; + } + } + return value; +} + + +/* + * The data returned by the following routine is always in left-most byte + * first and left-most bit first. If it doesn't return BitmapSuccess then + * its arguments won't have been touched. This routine should look as much + * like the Xlib routine XReadBitmapfile as possible. + */ +int +XmuReadBitmapData(FILE *fstream, unsigned int *width, unsigned int *height, + unsigned char **datap, int *x_hot, int *y_hot) +{ + unsigned char *data = NULL; /* working variable */ + char line[MAX_SIZE]; /* input line from file */ + int size; /* number of bytes of data */ + char name_and_type[MAX_SIZE]; /* an input line */ + char *type; /* for parsing */ + int value; /* from an input line */ + int version10p; /* boolean, old format */ + int padding; /* to handle alignment */ + int bytes_per_line; /* per scanline of data */ + unsigned int ww = 0; /* width */ + unsigned int hh = 0; /* height */ + int hx = -1; /* x hotspot */ + int hy = -1; /* y hotspot */ + +#undef Xmalloc /* see MALLOC_0_RETURNS_NULL in Xlibint.h */ +#define Xmalloc(size) malloc(size) + + /* first time initialization */ + if (initialized == False) initHexTable(); + + /* error cleanup and return macro */ +#define RETURN(code) { if (data) free (data); return code; } + + while (fgets(line, MAX_SIZE, fstream)) { + if (strlen(line) == MAX_SIZE-1) { + RETURN (BitmapFileInvalid); + } + if (sscanf(line,"#define %s %d",name_and_type,&value) == 2) { + if (!(type = strrchr(name_and_type, '_'))) + type = name_and_type; + else + type++; + + if (!strcmp("width", type)) + ww = (unsigned int) value; + if (!strcmp("height", type)) + hh = (unsigned int) value; + if (!strcmp("hot", type)) { + if (type-- == name_and_type || type-- == name_and_type) + continue; + if (!strcmp("x_hot", type)) + hx = value; + if (!strcmp("y_hot", type)) + hy = value; + } + continue; + } + + if (sscanf(line, "static short %s = {", name_and_type) == 1) + version10p = 1; + else if (sscanf(line,"static unsigned char %s = {",name_and_type) == 1) + version10p = 0; + else if (sscanf(line, "static char %s = {", name_and_type) == 1) + version10p = 0; + else + continue; + + if (!(type = strrchr(name_and_type, '_'))) + type = name_and_type; + else + type++; + + if (strcmp("bits[]", type)) + continue; + + if (!ww || !hh) + RETURN (BitmapFileInvalid); + + if ((ww % 16) && ((ww % 16) < 9) && version10p) + padding = 1; + else + padding = 0; + + bytes_per_line = (ww+7)/8 + padding; + + size = bytes_per_line * hh; + data = (unsigned char *) Xmalloc ((unsigned int) size); + if (!data) + RETURN (BitmapNoMemory); + + if (version10p) { + unsigned char *ptr; + int bytes; + + for (bytes=0, ptr=data; bytes<size; (bytes += 2)) { + if ((value = NextInt(fstream)) < 0) + RETURN (BitmapFileInvalid); + *(ptr++) = value; + if (!padding || ((bytes+2) % bytes_per_line)) + *(ptr++) = value >> 8; + } + } else { + unsigned char *ptr; + int bytes; + + for (bytes=0, ptr=data; bytes<size; bytes++, ptr++) { + if ((value = NextInt(fstream)) < 0) + RETURN (BitmapFileInvalid); + *ptr=value; + } + } + break; + } /* end while */ + + if (data == NULL) { + RETURN (BitmapFileInvalid); + } + + *datap = data; + data = NULL; + *width = ww; + *height = hh; + if (x_hot) *x_hot = hx; + if (y_hot) *y_hot = hy; + + RETURN (BitmapSuccess); +} + +#if defined(WIN32) +static int +access_file(char *path, char *pathbuf, int len_pathbuf, char **pathret) +{ + if (access (path, F_OK) == 0) { + if (strlen (path) < len_pathbuf) + *pathret = pathbuf; + else + *pathret = malloc (strlen (path) + 1); + if (*pathret) { + strcpy (*pathret, path); + return 1; + } + } + return 0; +} + +static int +AccessFile(char *path, char *pathbuf, int len_pathbuf, char **pathret) +{ +#ifndef MAX_PATH +#define MAX_PATH 512 +#endif + + unsigned long drives; + int i, len; + char* drive; + char buf[MAX_PATH]; + char* bufp; + + /* just try the "raw" name first and see if it works */ + if (access_file (path, pathbuf, len_pathbuf, pathret)) + return 1; + + /* try the places set in the environment */ + drive = getenv ("_XBASEDRIVE"); +#ifdef __UNIXOS2__ + if (!drive) + drive = getenv ("X11ROOT"); +#endif + if (!drive) + drive = "C:"; + len = strlen (drive) + strlen (path); + if (len < MAX_PATH) bufp = buf; + else bufp = malloc (len + 1); + strcpy (bufp, drive); + strcat (bufp, path); + if (access_file (bufp, pathbuf, len_pathbuf, pathret)) { + if (bufp != buf) free (bufp); + return 1; + } + +#ifndef __UNIXOS2__ + /* one last place to look */ + drive = getenv ("HOMEDRIVE"); + if (drive) { + len = strlen (drive) + strlen (path); + if (len < MAX_PATH) bufp = buf; + else bufp = malloc (len + 1); + strcpy (bufp, drive); + strcat (bufp, path); + if (access_file (bufp, pathbuf, len_pathbuf, pathret)) { + if (bufp != buf) free (bufp); + return 1; + } + } + + /* does OS/2 (with or with gcc-emx) have getdrives? */ + /* tried everywhere else, go fishing */ +#define C_DRIVE ('C' - 'A') +#define Z_DRIVE ('Z' - 'A') + drives = _getdrives (); + for (i = C_DRIVE; i <= Z_DRIVE; i++) { /* don't check on A: or B: */ + if ((1 << i) & drives) { + len = 2 + strlen (path); + if (len < MAX_PATH) bufp = buf; + else bufp = malloc (len + 1); + *bufp = 'A' + i; + *(bufp + 1) = ':'; + *(bufp + 2) = '\0'; + strcat (bufp, path); + if (access_file (bufp, pathbuf, len_pathbuf, pathret)) { + if (bufp != buf) free (bufp); + return 1; + } + } + } +#endif + return 0; +} + +FILE * +fopen_file(char *path, char *mode) +{ + char buf[MAX_PATH]; + char* bufp; + void* ret = NULL; + UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS); + + if (AccessFile (path, buf, MAX_PATH, &bufp)) + ret = fopen (bufp, mode); + + (void) SetErrorMode (olderror); + + if (bufp != buf) free (bufp); + + return ret; +} + +#else +#define fopen_file fopen +#endif + + +int +XmuReadBitmapDataFromFile(_Xconst char *filename, unsigned int *width, + unsigned int *height, unsigned char **datap, + int *x_hot, int *y_hot) +{ + FILE *fstream; + int status; + +#ifdef __UNIXOS2__ + filename = __XOS2RedirRoot(filename); +#endif + if ((fstream = fopen_file (filename, "r")) == NULL) { + return BitmapOpenFailed; + } + status = XmuReadBitmapData(fstream, width, height, datap, x_hot, y_hot); + fclose (fstream); + return status; +} |