/* Part of XPCE --- The SWI-Prolog GUI toolkit Author: Jan Wielemaker and Anjo Anjewierden E-mail: jan@swi.psy.uva.nl WWW: http://www.swi.psy.uva.nl/projects/xpce/ Copyright (c) 1995-2013, University of Amsterdam All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #ifndef __WATCOMC__ #include #endif /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Read various bitmap-formats and convert them into an X11 bitmap-data string to be used with XCreateBitmapFromData(). Functions provided: unsigned char *read_bitmap_data(IOSTREAM *fd, int *w, int *h) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ static unsigned char *read_x11_bitmap_file(IOSTREAM *, int *, int *); #define Round(n, r) ((((n) + (r) - 1) / (r)) * (r)) /******************************** * ENTRY POINT * ********************************/ unsigned char * read_bitmap_data(IOSTREAM *fd, int *w, int *h) { long offset = Stell(fd); unsigned char *rval; if ( (rval = read_x11_bitmap_file(fd, w, h)) != NULL ) return rval; Sseek(fd, offset, 0); return NULL; } /******************************** * X10/X11 FORMAT * ********************************/ /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The code below is copied from the MIT X11R5 distribution and modified for the interface required in PCE. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ #define MAX_SIZE 255 /* shared data for the image read/parse logic */ static short hexTable[256]; /* conversion value */ static int initialized = FALSE; /* easier to fill in at run time */ #define HT_NODIGIT (-2) /* * Table index for the hex values. Initialized once, first time. * Used for translation value or delimiter significance lookup. */ static void initHexTable(void) { int i; for(i=0; i<(sizeof(hexTable)/sizeof(short)); i++) hexTable[i] = -HT_NODIGIT; 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(IOSTREAM *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) { if ( Sfeof(fstream) ) { value = -1; done++; } else { int dvalue; ch = Sgetc(fstream) & 0xff; if ( ch == '\r' ) continue; dvalue = hexTable[ch]; if ( dvalue >= 0 ) { value = (value << 4) + dvalue; gotone++; } else if ((hexTable[ch]) == -1 && gotone) done++; } } return value; } static unsigned char * read_x11_bitmap_file(IOSTREAM *fd, int *w, int *h) { unsigned char *data = NULL; char line[LINESIZE]; int size = 0; char name_and_type[LINESIZE]; /* an input line */ char *type; /* for parsing */ int value; /* from an input line */ int version10p; /* bool, 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 */ if (initialized == FALSE) initHexTable(); #define RETURN_ERROR { if (data) pceFree(data); return NULL; } while (Sfgets(line, LINESIZE, fd)) { 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_ERROR; 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 *) pceMalloc(size); if (version10p) { unsigned char *ptr; int bytes; for (bytes=0, ptr=data; bytes> 8; } } else { unsigned char *ptr; int bytes; for (bytes=0, ptr=data; bytes