Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/DtHelp/XbmUtils.c

@@ -0,0 +1,303 @@
+/* $XConsortium: XbmUtils.c /main/4 1996/05/09 03:44:48 drk $ */
+/* 
+** XbmUtils.c
+**
+** This module provides routines that allow a pixmap to be generated from 
+** a _DtGrStream containing XBM data.  The module is adapted from the 
+** RdBitF.c module in the X11R6 version of libX11.
+*/
+
+/*
+
+Copyright (c) 1987  X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+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 X CONSORTIUM 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 X Consortium 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 X Consortium.
+
+*/
+
+/*
+ *	Code to read bitmaps from disk files. Interprets 
+ *	data from X10 and X11 bitmap files and creates
+ *	Pixmap representations of files. Returns Pixmap
+ *	ID and specifics about image.
+ *
+ *	Modified for speedup by Jim Becker, changed image
+ *	data parsing logic (removed some fscanf()s). 
+ *	Aug 5, 1988
+ *
+ * Note that this file and ../Xmu/RdBitF.c look very similar....  Keep them
+ * that way (but don't use common source code so that people can have one 
+ * without the other).
+ */
+
+#include <X11/Xlibint.h>
+#include <X11/Xos.h>
+#include <X11/Xutil.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#include "GraphicsP.h"
+#include "Lock.h"
+
+#define MAX_SIZE 255
+
+/* shared data for the image read/parse logic */
+static short hexTable[256];		/* conversion value */
+
+/*
+ *	Table index for the hex values. Initialized once, first time.
+ *	Used for translation value or delimiter significance lookup.
+ */
+static void initHexTable()
+{
+    /*
+     * 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;
+}
+
+/*
+ *	read next hex value in the input stream, return -1 if EOF
+ */
+static NextInt (fstream)
+    _DtGrStream *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 */
+
+    _DtHelpProcessLock();
+    while (!done) {
+	ch = _DtGrGetChar(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++;
+	}
+    }
+    _DtHelpProcessUnlock();
+    return value;
+}
+
+#if NeedFunctionPrototypes
+int _DtGrReadBitmapStreamData (
+    _DtGrStream *fstream,
+    unsigned int *width,                /* RETURNED */
+    unsigned int *height,               /* RETURNED */
+    unsigned char **data,               /* RETURNED */
+    int *x_hot,                         /* RETURNED */
+    int *y_hot)                         /* RETURNED */
+#else
+int _DtGrReadBitmapStreamData (stream, width, height, data, x_hot, y_hot)
+    _DtGrStream *fstream;
+    unsigned int *width, *height;       /* RETURNED */
+    unsigned char **data;               /* RETURNED */
+    int *x_hot, *y_hot;                 /* RETURNED */
+#endif
+{
+    unsigned char *bits = 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 */
+    static Bool initialized = False;	/* easier to fill in at run time */
+
+    /* first time initialization */
+    _DtHelpProcessLock();
+    if (initialized == False)
+      {
+	initHexTable();
+	initialized = True;
+      }
+    _DtHelpProcessUnlock();
+
+    /* error cleanup and return macro	*/
+#define	RETURN(code) \
+{ if (bits) Xfree ((char *)bits); return code; }
+
+    while (_DtGrGetString(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;
+	bits = (unsigned char *) Xmalloc ((unsigned int) size);
+	if (!bits) 
+	  RETURN (BitmapNoMemory);
+
+	if (version10p) {
+	    unsigned char *ptr;
+	    int bytes;
+
+	    for (bytes=0, ptr=bits; 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=bits; bytes<size; bytes++, ptr++) {
+		if ((value = NextInt(fstream)) < 0) 
+		  RETURN (BitmapFileInvalid);
+		*ptr=value;
+	    }
+	}
+    }					/* end while */
+
+    if (!bits)
+	return (BitmapFileInvalid);
+
+    *data = bits;
+    *width = ww;
+    *height = hh;
+    if (x_hot) *x_hot = hx;
+    if (y_hot) *y_hot = hy;
+
+    return (BitmapSuccess);
+}
+
+#if NeedFunctionPrototypes
+int _DtGrReadBitmapStream (
+    Display *display,
+    Drawable d,
+    _DtGrStream *stream,
+    unsigned int *width,                /* RETURNED */
+    unsigned int *height,               /* RETURNED */
+    Pixmap *pixmap,                     /* RETURNED */
+    int *x_hot,                         /* RETURNED */
+    int *y_hot)                         /* RETURNED */
+#else
+int _DtGrReadBitmapStream (display, d, stream, width, height, pixmap, x_hot, y_hot)
+    Display *display;
+    Drawable d;
+    _DtGrStream *stream;
+    char *filename;
+    unsigned int *width, *height;       /* RETURNED */
+    Pixmap *pixmap;                     /* RETURNED */
+    int *x_hot, *y_hot;                 /* RETURNED */
+#endif
+{
+    Pixmap pix;				/* value to return */
+    unsigned char *data;
+    int res;
+
+    res = _DtGrReadBitmapStreamData(stream, width, height, &data, x_hot, y_hot);
+    if (res != BitmapSuccess)
+	return res;
+    *pixmap = XCreateBitmapFromData(display, d, (char *)data, *width, *height);
+    Xfree((char *)data);
+    if (*pixmap == None)
+	return (BitmapNoMemory);
+    return (BitmapSuccess);
+}