Add pdfioFileCreateFontObjFromData function (Issue #120)

CHANGES.md

@@ -2,7 +2,14 @@ Changes in PDFio
 ================
 
 
-v1.5.2 - YYYY-MM-DD
+v1.6.0 - YYYY-MM-DD
+-------------------
+
+- Added `pdfioFileCreateFontObjFromData` function for embedding fonts in
+  memory (Issue #120)
+
+
+v1.5.2 - 2025-04-12
 -------------------
 
 - Updated maximum allowed PDF string size to 64k (Issue #117)
@@ -11,6 +18,7 @@ v1.5.2 - YYYY-MM-DD
 - Fixed form detection in `pdfioinfo` example code (Issue #114)
 - Fixed parsing of certain date/time values (Issue #115)
 - Fixed support for empty name values (Issue #116)
+- Fixed range checking in `pdfioImageGetBytesPerLine` (Issue #121)
 
 
 v1.5.1 - 2025-03-28

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.71 for pdfio 1.5.2.
+# Generated by GNU Autoconf 2.71 for pdfio 1.6.0.
 #
 # Report bugs to <https://github.com/michaelrsweet/pdfio/issues>.
 #
@@ -610,8 +610,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='pdfio'
 PACKAGE_TARNAME='pdfio'
-PACKAGE_VERSION='1.5.2'
+PACKAGE_VERSION='1.6.0'
-PACKAGE_STRING='pdfio 1.5.2'
+PACKAGE_STRING='pdfio 1.6.0'
 PACKAGE_BUGREPORT='https://github.com/michaelrsweet/pdfio/issues'
 PACKAGE_URL='https://www.msweet.org/pdfio'
 
@@ -1295,7 +1295,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures pdfio 1.5.2 to adapt to many kinds of systems.
+\`configure' configures pdfio 1.6.0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1361,7 +1361,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of pdfio 1.5.2:";;
+     short | recursive ) echo "Configuration of pdfio 1.6.0:";;
    esac
   cat <<\_ACEOF
 
@@ -1460,7 +1460,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-pdfio configure 1.5.2
+pdfio configure 1.6.0
 generated by GNU Autoconf 2.71
 
 Copyright (C) 2021 Free Software Foundation, Inc.
@@ -1678,7 +1678,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by pdfio $as_me 1.5.2, which was
+It was created by pdfio $as_me 1.6.0, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -2434,9 +2434,9 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
-PDFIO_VERSION="1.5.2"
+PDFIO_VERSION="1.6.0"
-PDFIO_VERSION_MAJOR="`echo 1.5.2 | awk -F. '{print $1}'`"
+PDFIO_VERSION_MAJOR="`echo 1.6.0 | awk -F. '{print $1}'`"
-PDFIO_VERSION_MINOR="`echo 1.5.2 | awk -F. '{printf("%d\n",$2);}'`"
+PDFIO_VERSION_MINOR="`echo 1.6.0 | awk -F. '{printf("%d\n",$2);}'`"
 
 
 
@@ -5099,7 +5099,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by pdfio $as_me 1.5.2, which was
+This file was extended by pdfio $as_me 1.6.0, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -5155,7 +5155,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-pdfio config.status 1.5.2
+pdfio config.status 1.6.0
 configured by $0, generated by GNU Autoconf 2.71,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -21,7 +21,7 @@ AC_PREREQ([2.70])
 
 
 dnl Package name and version...
-AC_INIT([pdfio], [1.5.2], [https://github.com/michaelrsweet/pdfio/issues], [pdfio], [https://www.msweet.org/pdfio])
+AC_INIT([pdfio], [1.6.0], [https://github.com/michaelrsweet/pdfio/issues], [pdfio], [https://www.msweet.org/pdfio])
 
 PDFIO_VERSION="AC_PACKAGE_VERSION"
 PDFIO_VERSION_MAJOR="`echo AC_PACKAGE_VERSION | awk -F. '{print $1}'`"

doc/pdfio.3

@@ -1,4 +1,4 @@
-.TH pdfio 3 "pdf read/write library" "2025-04-04" "pdf read/write library"
+.TH pdfio 3 "pdf read/write library" "2025-04-12" "pdf read/write library"
 .SH NAME
 pdfio \- pdf read/write library
 .SH Introduction

doc/pdfio.html

@@ -4787,7 +4787,7 @@ size_t pdfioImageGetBytesPerLine(<a href="#pdfio_obj_t">pdfio_obj_t</a> *obj);</
 <td class="description">Image object</td></tr>
 </tbody></table>
 <h4 class="returnvalue">Return Value</h4>
-<p class="description">Number of bytes per line</p>
+<p class="description">Number of bytes per line or <code>0</code> on error</p>
 <h3 class="function"><a id="pdfioImageGetHeight">pdfioImageGetHeight</a></h3>
 <p class="description">Get the height of an image object.</p>
 <p class="code">

makesrcdist

@@ -32,11 +32,11 @@ if test $(grep AC_INIT configure.ac | awk '{print $2}') != "[$version],"; then
     status=1
 fi
 
-if test $(head -4 CHANGES.md | tail -1 | awk '{print $1}') != "v$version"; then
+if test $(head -5 CHANGES.md | tail -1 | awk '{print $1}') != "v$version"; then
     echo "Still need to update CHANGES.md version number."
     status=1
 fi
-if test $(head -4 CHANGES.md | tail -1 | awk '{print $3}') = "YYYY-MM-DD"; then
+if test $(head -5 CHANGES.md | tail -1 | awk '{print $3}') = "YYYY-MM-DD"; then
     echo "Still need to update CHANGES.md release date."
     status=1
 fi

pdfio-content.c

@@ -84,6 +84,7 @@ typedef pdfio_obj_t *(*_pdfio_image_func_t)(pdfio_dict_t *dict, int fd);
 static pdfio_obj_t	*copy_jpeg(pdfio_dict_t *dict, int fd);
 static pdfio_obj_t	*copy_png(pdfio_dict_t *dict, int fd);
 static bool		create_cp1252(pdfio_file_t *pdf);
+static pdfio_obj_t	*create_font(pdfio_obj_t *file_obj, ttf_t *font, bool unicode);
 static pdfio_obj_t	*create_image(pdfio_dict_t *dict, const unsigned char *data, size_t width, size_t height, size_t depth, size_t num_colors, bool alpha);
 #ifdef HAVE_LIBPNG
 static void		png_error_func(png_structp pp, png_const_charp message);
@@ -1536,9 +1537,84 @@ pdfioFileCreateFontObjFromBase(
 
 
 //
-// 'pdfioFileCreateFontObjFromFile()' - Add a font object to a PDF file.
+// 'pdfioFileCreateFontObjFromData()' - Add a font in memory to a PDF file.
 //
-// This function embeds a TrueType/OpenType font into a PDF file.  The
+// This function embeds TrueType/OpenType font data into a PDF file.  The
+// "unicode" parameter controls whether the font is encoded for two-byte
+// characters (potentially full Unicode, but more typically a subset)
+// or to only support the Windows CP1252 (ISO-8859-1 with additional
+// characters such as the Euro symbol) subset of Unicode.
+//
+
+pdfio_obj_t *				// O - Font object
+pdfioFileCreateFontObjFromData(
+    pdfio_file_t *pdf,			// I - PDF file
+    const void   *data,			// I - Font data in memory
+    size_t       datasize,		// I - Size of font in memory
+    bool         unicode)		// I - Force Unicode
+{
+  ttf_t		*font;			// TrueType font
+  pdfio_obj_t	*obj,			// Font object
+		*file_obj = NULL;	// File object
+  pdfio_dict_t	*file;			// Font file dictionary
+  pdfio_stream_t *st = NULL;		// Font stream
+
+
+  // Range check input...
+  if (!pdf)
+    return (NULL);
+
+  if (!data || !datasize)
+  {
+    _pdfioFileError(pdf, "No TrueType/OpenType data specified.");
+    return (NULL);
+  }
+
+  // Create a TrueType font object from the data...
+  if ((font = ttfCreateData(data, datasize, 0, (ttf_err_cb_t)ttf_error_cb, pdf)) == NULL)
+    return (NULL);
+
+  // Create the font file dictionary and object...
+  if ((file = pdfioDictCreate(pdf)) == NULL)
+    goto error;
+
+  pdfioDictSetName(file, "Filter", "FlateDecode");
+
+  if ((file_obj = pdfioFileCreateObj(pdf, file)) == NULL)
+    goto error;
+
+  if ((st = pdfioObjCreateStream(file_obj, PDFIO_FILTER_FLATE)) == NULL)
+    goto error;
+
+  if (!pdfioStreamWrite(st, data, datasize))
+    goto error;
+
+  pdfioStreamClose(st);
+
+  // Create the font object...
+  if ((obj = create_font(file_obj, font, unicode)) == NULL)
+    ttfDelete(font);
+
+  return (obj);
+
+  // If we get here we had an unrecoverable error...
+  error:
+
+  if (st)
+    pdfioStreamClose(st);
+  else
+    pdfioObjClose(file_obj);
+
+  ttfDelete(font);
+
+  return (NULL);
+}
+
+
+//
+// 'pdfioFileCreateFontObjFromFile()' - Add a font file to a PDF file.
+//
+// This function embeds a TrueType/OpenType font file into a PDF file.  The
 // "unicode" parameter controls whether the font is encoded for two-byte
 // characters (potentially full Unicode, but more typically a subset)
 // or to only support the Windows CP1252 (ISO-8859-1 with additional
@@ -1552,16 +1628,10 @@ pdfioFileCreateFontObjFromFile(
     bool         unicode)		// I - Force Unicode
 {
   ttf_t		*font;			// TrueType font
-  ttf_rect_t	bounds;			// Font bounds
+  pdfio_dict_t	*file;			// Font file dictionary
-  pdfio_dict_t	*dict,			// Font dictionary
+  pdfio_obj_t	*obj,			// Font object
-		*desc,			// Font descriptor
+		*file_obj = NULL;	// Font file object
-		*file;			// Font file dictionary
+  pdfio_stream_t *st = NULL;		// Font stream
-  pdfio_obj_t	*obj = NULL,		// Font object
-		*desc_obj,		// Font descriptor object
-		*file_obj;		// Font file object
-  const char	*basefont;		// Base font name
-  pdfio_array_t	*bbox;			// Font bounding box array
-  pdfio_stream_t *st;			// Font stream
   int		fd = -1;		// File
   unsigned char	buffer[16384];		// Read buffer
   ssize_t	bytes;			// Bytes read
@@ -1584,360 +1654,50 @@ pdfioFileCreateFontObjFromFile(
   }
 
   if ((font = ttfCreate(filename, 0, (ttf_err_cb_t)ttf_error_cb, pdf)) == NULL)
-  {
+    goto error;
-    close(fd);
-    return (NULL);
-  }
 
   // Create the font file dictionary and object...
   if ((file = pdfioDictCreate(pdf)) == NULL)
-    goto done;
+    goto error;
 
   pdfioDictSetName(file, "Filter", "FlateDecode");
 
   if ((file_obj = pdfioFileCreateObj(pdf, file)) == NULL)
-    goto done;
+    goto error;
 
   if ((st = pdfioObjCreateStream(file_obj, PDFIO_FILTER_FLATE)) == NULL)
-    goto done;
+    goto error;
 
   while ((bytes = read(fd, buffer, sizeof(buffer))) > 0)
   {
     if (!pdfioStreamWrite(st, buffer, (size_t)bytes))
-    {
+      goto error;
-      pdfioStreamClose(st);
-      goto done;
-    }
   }
 
   close(fd);
-  fd = -1;
-  pdfioStreamClose(st);
-
-  // Create the font descriptor dictionary and object...
-  if ((bbox = pdfioArrayCreate(pdf)) == NULL)
-    goto done;
-
-  ttfGetBounds(font, &bounds);
-
-  pdfioArrayAppendNumber(bbox, bounds.left);
-  pdfioArrayAppendNumber(bbox, bounds.bottom);
-  pdfioArrayAppendNumber(bbox, bounds.right);
-  pdfioArrayAppendNumber(bbox, bounds.top);
-
-  if ((desc = pdfioDictCreate(pdf)) == NULL)
-    goto done;
-
-  basefont = pdfioStringCreate(pdf, ttfGetPostScriptName(font));
-
-  pdfioDictSetName(desc, "Type", "FontDescriptor");
-  pdfioDictSetName(desc, "FontName", basefont);
-  pdfioDictSetObj(desc, "FontFile2", file_obj);
-  pdfioDictSetNumber(desc, "Flags", ttfIsFixedPitch(font) ? 0x21 : 0x20);
-  pdfioDictSetArray(desc, "FontBBox", bbox);
-  pdfioDictSetNumber(desc, "ItalicAngle", ttfGetItalicAngle(font));
-  pdfioDictSetNumber(desc, "Ascent", ttfGetAscent(font));
-  pdfioDictSetNumber(desc, "Descent", ttfGetDescent(font));
-  pdfioDictSetNumber(desc, "CapHeight", ttfGetCapHeight(font));
-  pdfioDictSetNumber(desc, "XHeight", ttfGetXHeight(font));
-  // Note: No TrueType value exists for this but PDF requires it, so we
-  // calculate a generic value from 50 to 250 based on the weight...
-  pdfioDictSetNumber(desc, "StemV", ttfGetWeight(font) / 4 + 25);
-
-  if ((desc_obj = pdfioFileCreateObj(pdf, desc)) == NULL)
-    goto done;
-
-  pdfioObjClose(desc_obj);
-
-  if (unicode)
-  {
-    // Unicode (CID) font...
-    pdfio_dict_t	*cid2gid,	// CIDToGIDMap dictionary
-			*to_unicode;	// ToUnicode dictionary
-    pdfio_obj_t		*cid2gid_obj,	// CIDToGIDMap object
-			*to_unicode_obj;// ToUnicode object
-    size_t		i, j,		// Looping vars
-			num_cmap;	// Number of CMap entries
-    const int		*cmap;		// CMap entries
-    int			min_glyph,	// First glyph
-			max_glyph;	// Last glyph
-    unsigned short	glyphs[65536];	// Glyph to Unicode mapping
-    unsigned char	*bufptr,	// Pointer into buffer
-			*bufend;	// End of buffer
-    pdfio_dict_t	*type2;		// CIDFontType2 font dictionary
-    pdfio_obj_t		*type2_obj;	// CIDFontType2 font object
-    pdfio_array_t	*descendants;	// Decendant font list
-    pdfio_dict_t	*sidict;	// CIDSystemInfo dictionary
-    pdfio_array_t	*w_array,	// Width array
-			*temp_array;	// Temporary width sub-array
-    int			w0, w1;		// Widths
-
-    // Create a CIDSystemInfo mapping to Adobe UCS2 v0 (Unicode)
-    if ((sidict = pdfioDictCreate(pdf)) == NULL)
-      goto done;
-
-    pdfioDictSetString(sidict, "Registry", "Adobe");
-    pdfioDictSetString(sidict, "Ordering", "Identity");
-    pdfioDictSetNumber(sidict, "Supplement", 0);
-
-    // Create a CIDToGIDMap object for the Unicode font...
-    if ((cid2gid = pdfioDictCreate(pdf)) == NULL)
-      goto done;
-
-#ifndef DEBUG
-    pdfioDictSetName(cid2gid, "Filter", "FlateDecode");
-#endif // !DEBUG
-
-    if ((cid2gid_obj = pdfioFileCreateObj(pdf, cid2gid)) == NULL)
-      goto done;
-
-#ifdef DEBUG
-    if ((st = pdfioObjCreateStream(cid2gid_obj, PDFIO_FILTER_NONE)) == NULL)
-#else
-    if ((st = pdfioObjCreateStream(cid2gid_obj, PDFIO_FILTER_FLATE)) == NULL)
-#endif // DEBUG
-      goto done;
-
-    cmap      = ttfGetCMap(font, &num_cmap);
-    min_glyph = 65536;
-    max_glyph = 0;
-    memset(glyphs, 0, sizeof(glyphs));
-
-    PDFIO_DEBUG("pdfioFileCreateFontObjFromFile: num_cmap=%u\n", (unsigned)num_cmap);
-
-    for (i = 0, bufptr = buffer, bufend = buffer + sizeof(buffer); i < num_cmap; i ++)
-    {
-      PDFIO_DEBUG("pdfioFileCreateFontObjFromFile: cmap[%u]=%d\n", (unsigned)i, cmap[i]);
-      if (cmap[i] < 0 || cmap[i] >= (int)(sizeof(glyphs) / sizeof(glyphs[0])))
-      {
-        // Map undefined glyph to .notdef...
-        *bufptr++ = 0;
-        *bufptr++ = 0;
-      }
-      else
-      {
-        // Map to specified glyph...
-        *bufptr++ = (unsigned char)(cmap[i] >> 8);
-        *bufptr++ = (unsigned char)(cmap[i] & 255);
-
-        glyphs[cmap[i]] = (unsigned short)i;
-        if (cmap[i] < min_glyph)
-          min_glyph = cmap[i];
-        if (cmap[i] > max_glyph)
-          max_glyph = cmap[i];
-      }
-
-      if (bufptr >= bufend)
-      {
-        // Flush buffer...
-        if (!pdfioStreamWrite(st, buffer, (size_t)(bufptr - buffer)))
-        {
-	  pdfioStreamClose(st);
-	  goto done;
-        }
-
-        bufptr = buffer;
-      }
-    }
-
-    if (bufptr > buffer)
-    {
-      // Flush buffer...
-      if (!pdfioStreamWrite(st, buffer, (size_t)(bufptr - buffer)))
-      {
-	pdfioStreamClose(st);
-	goto done;
-      }
-    }
 
   pdfioStreamClose(st);
 
-    // ToUnicode mapping object
+  // Create the font object...
-    to_unicode = pdfioDictCreate(pdf);
+  if ((obj = create_font(file_obj, font, unicode)) == NULL)
-    pdfioDictSetName(to_unicode, "Type", "CMap");
+    ttfDelete(font);
-    pdfioDictSetName(to_unicode, "CMapName", "Adobe-Identity-UCS2");
-    pdfioDictSetDict(to_unicode, "CIDSystemInfo", sidict);
 
-#ifndef DEBUG
+  return (obj);
-    pdfioDictSetName(to_unicode, "Filter", "FlateDecode");
-#endif // !DEBUG
 
-    if ((to_unicode_obj = pdfioFileCreateObj(pdf, to_unicode)) == NULL)
+  // If we get here we had an unrecoverable error...
-      goto done;
+  error:
-
-#ifdef DEBUG
-    if ((st = pdfioObjCreateStream(to_unicode_obj, PDFIO_FILTER_NONE)) == NULL)
-#else
-    if ((st = pdfioObjCreateStream(to_unicode_obj, PDFIO_FILTER_FLATE)) == NULL)
-#endif // DEBUG
-      goto done;
-
-    pdfioStreamPuts(st,
-		    "stream\n"
-		    "/CIDInit /ProcSet findresource begin\n"
-		    "12 dict begin\n"
-		    "begincmap\n"
-		    "/CIDSystemInfo<<\n"
-		    "/Registry (Adobe)\n"
-		    "/Ordering (UCS2)\n"
-		    "/Supplement 0\n"
-		    ">> def\n"
-		    "/CMapName /Adobe-Identity-UCS2 def\n"
-		    "/CMapType 2 def\n"
-		    "1 begincodespacerange\n"
-		    "<0000> <FFFF>\n"
-		    "endcodespacerange\n"
-                    "endcmap\n"
-                    "CMapName currentdict /CMap defineresource pop\n"
-                    "end\n"
-                    "end\n");
-
-    pdfioStreamClose(st);
-
-    // Create a CIDFontType2 dictionary for the Unicode font...
-    if ((type2 = pdfioDictCreate(pdf)) == NULL)
-      goto done;
-
-    // Width array
-    if ((w_array = pdfioArrayCreate(pdf)) == NULL)
-      goto done;
-
-    for (i = 0, w0 = ttfGetWidth(font, 0), w1 = 0; i < 65536; w0 = w1)
-    {
-      for (j = 1; (i + j) < 65536; j ++)
-      {
-        if ((w1 = ttfGetWidth(font, (int)(i + j))) != w0)
-          break;
-      }
-
-      if (j >= 4)
-      {
-        // Encode a long sequence of zeros...
-	// Encode a repeating sequence...
-	pdfioArrayAppendNumber(w_array, (double)i);
-	pdfioArrayAppendNumber(w_array, (double)(i + j - 1));
-	pdfioArrayAppendNumber(w_array, w0);
-
-	i += j;
-      }
-      else
-      {
-        // Encode a non-repeating sequence...
-        pdfioArrayAppendNumber(w_array, (double)i);
-
-        if ((temp_array = pdfioArrayCreate(pdf)) == NULL)
-	  goto done;
-
-        pdfioArrayAppendNumber(temp_array, w0);
-        for (i ++; i < 65536 && pdfioArrayGetSize(temp_array) < 8191; i ++, w0 = w1)
-        {
-          if ((w1 = ttfGetWidth(font, (int)i)) == w0 && i < 65530)
-          {
-            for (j = 1; j < 4; j ++)
-            {
-              if (ttfGetWidth(font, (int)(i + j)) != w0)
-                break;
-            }
-
-            if (j >= 4)
-	      break;
-	  }
-
-	  pdfioArrayAppendNumber(temp_array, w1);
-        }
-
-        pdfioArrayAppendArray(w_array, temp_array);
-      }
-    }
-
-    // Then the dictionary for the CID base font...
-    pdfioDictSetName(type2, "Type", "Font");
-    pdfioDictSetName(type2, "Subtype", "CIDFontType2");
-    pdfioDictSetName(type2, "BaseFont", basefont);
-    pdfioDictSetDict(type2, "CIDSystemInfo", sidict);
-    pdfioDictSetObj(type2, "CIDToGIDMap", cid2gid_obj);
-    pdfioDictSetObj(type2, "FontDescriptor", desc_obj);
-    pdfioDictSetArray(type2, "W", w_array);
-
-    if ((type2_obj = pdfioFileCreateObj(pdf, type2)) == NULL)
-      goto done;
-
-    pdfioObjClose(type2_obj);
-
-    // Create a Type 0 font object...
-    if ((descendants = pdfioArrayCreate(pdf)) == NULL)
-      goto done;
-
-    pdfioArrayAppendObj(descendants, type2_obj);
-
-    if ((dict = pdfioDictCreate(pdf)) == NULL)
-      goto done;
-
-    pdfioDictSetName(dict, "Type", "Font");
-    pdfioDictSetName(dict, "Subtype", "Type0");
-    pdfioDictSetName(dict, "BaseFont", basefont);
-    pdfioDictSetArray(dict, "DescendantFonts", descendants);
-    pdfioDictSetName(dict, "Encoding", "Identity-H");
-    pdfioDictSetObj(dict, "ToUnicode", to_unicode_obj);
-
-    if ((obj = pdfioFileCreateObj(pdf, dict)) != NULL)
-      pdfioObjClose(obj);
-  }
-  else
-  {
-    // Simple (CP1282 or custom encoding) 8-bit font...
-    int			ch;		// Character
-    pdfio_array_t	*w_array;	// Widths array
-
-    if (ttfGetMaxChar(font) >= 255 && !pdf->cp1252_obj && !create_cp1252(pdf))
-      goto done;
-
-    // Create a TrueType font object...
-    if ((dict = pdfioDictCreate(pdf)) == NULL)
-      goto done;
-
-    pdfioDictSetName(dict, "Type", "Font");
-    pdfioDictSetName(dict, "Subtype", "TrueType");
-    pdfioDictSetName(dict, "BaseFont", basefont);
-    pdfioDictSetNumber(dict, "FirstChar", 32);
-    if (ttfGetMaxChar(font) >= 255)
-    {
-      pdfioDictSetObj(dict, "Encoding", pdf->cp1252_obj);
-      pdfioDictSetNumber(dict, "LastChar", 255);
-    }
-    else
-    {
-      pdfioDictSetNumber(dict, "LastChar", ttfGetMaxChar(font));
-    }
-
-    // Build a Widths array for CP1252/WinAnsiEncoding
-    if ((w_array = pdfioArrayCreate(pdf)) == NULL)
-      goto done;
-
-    for (ch = 32; ch < 256 && ch < ttfGetMaxChar(font); ch ++)
-    {
-      if (ch >= 0x80 && ch < 0xa0)
-	pdfioArrayAppendNumber(w_array, ttfGetWidth(font, _pdfio_cp1252[ch - 0x80]));
-      else
-	pdfioArrayAppendNumber(w_array, ttfGetWidth(font, ch));
-    }
-
-    pdfioDictSetArray(dict, "Widths", w_array);
-
-    pdfioDictSetObj(dict, "FontDescriptor", desc_obj);
-
-    if ((obj = pdfioFileCreateObj(pdf, dict)) != NULL)
-      pdfioObjClose(obj);
-  }
-
-  done:
 
   if (fd >= 0)
     close(fd);
 
-  _pdfioObjSetExtension(obj, font, (_pdfio_extfree_t)ttfDelete);
+  if (st)
+    pdfioStreamClose(st);
+  else
+    pdfioObjClose(file_obj);
 
-  return (obj);
+  ttfDelete(font);
+
+  return (NULL);
 }
 
 
@@ -2233,7 +1993,7 @@ pdfioFileCreateImageObjFromFile(
 // 'pdfioImageGetBytesPerLine()' - Get the number of bytes to read for each line.
 //
 
-size_t					// O - Number of bytes per line
+size_t					// O - Number of bytes per line or `0` on error
 pdfioImageGetBytesPerLine(
     pdfio_obj_t *obj)			// I - Image object
 {
@@ -2279,8 +2039,26 @@ pdfioImageGetBytesPerLine(
       colors = 1;
   }
 
+  if (width < 0)
+  {
+    _pdfioFileError(obj->pdf, "Invalid image width %d.", width);
+    return (0);
+  }
+  else if (bpc != 1 && bpc != 2 && bpc != 4 && bpc != 8 && bpc != 16)
+  {
+    _pdfioFileError(obj->pdf, "Invalid image bits per component %d.", bpc);
+    return (0);
+  }
+  else if (colors < 1 || colors > 4)
+  {
+    _pdfioFileError(obj->pdf, "Invalid image number of colors %d.", colors);
+    return (0);
+  }
+  else
+  {
     return ((size_t)((width * colors * bpc + 7) / 8));
   }
+}
 
 
 //
@@ -3289,6 +3067,351 @@ create_cp1252(pdfio_file_t *pdf)	// I - PDF file
 }
 
 
+//
+// 'create_font()' - Create the object for a TrueType font.
+//
+
+static pdfio_obj_t *			// O - Font object
+create_font(pdfio_obj_t *file_obj,	// I - Font file object
+            ttf_t       *font,		// I - TrueType font
+            bool        unicode)	// I - Force Unicode
+{
+  ttf_rect_t	bounds;			// Font bounds
+  pdfio_dict_t	*dict,			// Font dictionary
+		*desc;			// Font descriptor
+  pdfio_obj_t	*obj = NULL,		// Font object
+		*desc_obj;		// Font descriptor object
+  const char	*basefont;		// Base font name
+  pdfio_array_t	*bbox;			// Font bounding box array
+  pdfio_stream_t *st;			// Font stream
+
+
+  // Create the font descriptor dictionary and object...
+  if ((bbox = pdfioArrayCreate(file_obj->pdf)) == NULL)
+    goto done;
+
+  ttfGetBounds(font, &bounds);
+
+  pdfioArrayAppendNumber(bbox, bounds.left);
+  pdfioArrayAppendNumber(bbox, bounds.bottom);
+  pdfioArrayAppendNumber(bbox, bounds.right);
+  pdfioArrayAppendNumber(bbox, bounds.top);
+
+  if ((desc = pdfioDictCreate(file_obj->pdf)) == NULL)
+    goto done;
+
+  if ((basefont = pdfioStringCreate(file_obj->pdf, ttfGetPostScriptName(font))) == NULL)
+    goto done;
+
+  pdfioDictSetName(desc, "Type", "FontDescriptor");
+  pdfioDictSetName(desc, "FontName", basefont);
+  pdfioDictSetObj(desc, "FontFile2", file_obj);
+  pdfioDictSetNumber(desc, "Flags", ttfIsFixedPitch(font) ? 0x21 : 0x20);
+  pdfioDictSetArray(desc, "FontBBox", bbox);
+  pdfioDictSetNumber(desc, "ItalicAngle", ttfGetItalicAngle(font));
+  pdfioDictSetNumber(desc, "Ascent", ttfGetAscent(font));
+  pdfioDictSetNumber(desc, "Descent", ttfGetDescent(font));
+  pdfioDictSetNumber(desc, "CapHeight", ttfGetCapHeight(font));
+  pdfioDictSetNumber(desc, "XHeight", ttfGetXHeight(font));
+  // Note: No TrueType value exists for this but PDF requires it, so we
+  // calculate a generic value from 50 to 250 based on the weight...
+  pdfioDictSetNumber(desc, "StemV", ttfGetWeight(font) / 4 + 25);
+
+  if ((desc_obj = pdfioFileCreateObj(file_obj->pdf, desc)) == NULL)
+    goto done;
+
+  pdfioObjClose(desc_obj);
+
+  if (unicode)
+  {
+    // Unicode (CID) font...
+    pdfio_dict_t	*cid2gid,	// CIDToGIDMap dictionary
+			*to_unicode;	// ToUnicode dictionary
+    pdfio_obj_t		*cid2gid_obj,	// CIDToGIDMap object
+			*to_unicode_obj;// ToUnicode object
+    size_t		i, j,		// Looping vars
+			num_cmap;	// Number of CMap entries
+    const int		*cmap;		// CMap entries
+    int			min_glyph,	// First glyph
+			max_glyph;	// Last glyph
+    unsigned short	glyphs[65536];	// Glyph to Unicode mapping
+    unsigned char	buffer[16384],	// Read buffer
+			*bufptr,	// Pointer into buffer
+			*bufend;	// End of buffer
+    pdfio_dict_t	*type2;		// CIDFontType2 font dictionary
+    pdfio_obj_t		*type2_obj;	// CIDFontType2 font object
+    pdfio_array_t	*descendants;	// Decendant font list
+    pdfio_dict_t	*sidict;	// CIDSystemInfo dictionary
+    pdfio_array_t	*w_array,	// Width array
+			*temp_array;	// Temporary width sub-array
+    int			w0, w1;		// Widths
+
+    // Create a CIDSystemInfo mapping to Adobe UCS2 v0 (Unicode)
+    if ((sidict = pdfioDictCreate(file_obj->pdf)) == NULL)
+      goto done;
+
+    pdfioDictSetString(sidict, "Registry", "Adobe");
+    pdfioDictSetString(sidict, "Ordering", "Identity");
+    pdfioDictSetNumber(sidict, "Supplement", 0);
+
+    // Create a CIDToGIDMap object for the Unicode font...
+    if ((cid2gid = pdfioDictCreate(file_obj->pdf)) == NULL)
+      goto done;
+
+#ifndef DEBUG
+    pdfioDictSetName(cid2gid, "Filter", "FlateDecode");
+#endif // !DEBUG
+
+    if ((cid2gid_obj = pdfioFileCreateObj(file_obj->pdf, cid2gid)) == NULL)
+      goto done;
+
+#ifdef DEBUG
+    if ((st = pdfioObjCreateStream(cid2gid_obj, PDFIO_FILTER_NONE)) == NULL)
+#else
+    if ((st = pdfioObjCreateStream(cid2gid_obj, PDFIO_FILTER_FLATE)) == NULL)
+#endif // DEBUG
+      goto done;
+
+    cmap      = ttfGetCMap(font, &num_cmap);
+    min_glyph = 65536;
+    max_glyph = 0;
+    memset(glyphs, 0, sizeof(glyphs));
+
+    PDFIO_DEBUG("create_font: num_cmap=%u\n", (unsigned)num_cmap);
+
+    for (i = 0, bufptr = buffer, bufend = buffer + sizeof(buffer); i < num_cmap; i ++)
+    {
+      PDFIO_DEBUG("create_font: cmap[%u]=%d\n", (unsigned)i, cmap[i]);
+      if (cmap[i] < 0 || cmap[i] >= (int)(sizeof(glyphs) / sizeof(glyphs[0])))
+      {
+        // Map undefined glyph to .notdef...
+        *bufptr++ = 0;
+        *bufptr++ = 0;
+      }
+      else
+      {
+        // Map to specified glyph...
+        *bufptr++ = (unsigned char)(cmap[i] >> 8);
+        *bufptr++ = (unsigned char)(cmap[i] & 255);
+
+        glyphs[cmap[i]] = (unsigned short)i;
+        if (cmap[i] < min_glyph)
+          min_glyph = cmap[i];
+        if (cmap[i] > max_glyph)
+          max_glyph = cmap[i];
+      }
+
+      if (bufptr >= bufend)
+      {
+        // Flush buffer...
+        if (!pdfioStreamWrite(st, buffer, (size_t)(bufptr - buffer)))
+        {
+	  pdfioStreamClose(st);
+	  goto done;
+        }
+
+        bufptr = buffer;
+      }
+    }
+
+    if (bufptr > buffer)
+    {
+      // Flush buffer...
+      if (!pdfioStreamWrite(st, buffer, (size_t)(bufptr - buffer)))
+      {
+	pdfioStreamClose(st);
+	goto done;
+      }
+    }
+
+    pdfioStreamClose(st);
+
+    // ToUnicode mapping object
+    to_unicode = pdfioDictCreate(file_obj->pdf);
+    pdfioDictSetName(to_unicode, "Type", "CMap");
+    pdfioDictSetName(to_unicode, "CMapName", "Adobe-Identity-UCS2");
+    pdfioDictSetDict(to_unicode, "CIDSystemInfo", sidict);
+
+#ifndef DEBUG
+    pdfioDictSetName(to_unicode, "Filter", "FlateDecode");
+#endif // !DEBUG
+
+    if ((to_unicode_obj = pdfioFileCreateObj(file_obj->pdf, to_unicode)) == NULL)
+      goto done;
+
+#ifdef DEBUG
+    if ((st = pdfioObjCreateStream(to_unicode_obj, PDFIO_FILTER_NONE)) == NULL)
+#else
+    if ((st = pdfioObjCreateStream(to_unicode_obj, PDFIO_FILTER_FLATE)) == NULL)
+#endif // DEBUG
+      goto done;
+
+    pdfioStreamPuts(st,
+		    "stream\n"
+		    "/CIDInit /ProcSet findresource begin\n"
+		    "12 dict begin\n"
+		    "begincmap\n"
+		    "/CIDSystemInfo<<\n"
+		    "/Registry (Adobe)\n"
+		    "/Ordering (UCS2)\n"
+		    "/Supplement 0\n"
+		    ">> def\n"
+		    "/CMapName /Adobe-Identity-UCS2 def\n"
+		    "/CMapType 2 def\n"
+		    "1 begincodespacerange\n"
+		    "<0000> <FFFF>\n"
+		    "endcodespacerange\n"
+                    "endcmap\n"
+                    "CMapName currentdict /CMap defineresource pop\n"
+                    "end\n"
+                    "end\n");
+
+    pdfioStreamClose(st);
+
+    // Create a CIDFontType2 dictionary for the Unicode font...
+    if ((type2 = pdfioDictCreate(file_obj->pdf)) == NULL)
+      goto done;
+
+    // Width array
+    if ((w_array = pdfioArrayCreate(file_obj->pdf)) == NULL)
+      goto done;
+
+    for (i = 0, w0 = ttfGetWidth(font, 0), w1 = 0; i < 65536; w0 = w1)
+    {
+      for (j = 1; (i + j) < 65536; j ++)
+      {
+        if ((w1 = ttfGetWidth(font, (int)(i + j))) != w0)
+          break;
+      }
+
+      if (j >= 4)
+      {
+        // Encode a long sequence of zeros...
+	// Encode a repeating sequence...
+	pdfioArrayAppendNumber(w_array, (double)i);
+	pdfioArrayAppendNumber(w_array, (double)(i + j - 1));
+	pdfioArrayAppendNumber(w_array, w0);
+
+	i += j;
+      }
+      else
+      {
+        // Encode a non-repeating sequence...
+        pdfioArrayAppendNumber(w_array, (double)i);
+
+        if ((temp_array = pdfioArrayCreate(file_obj->pdf)) == NULL)
+	  goto done;
+
+        pdfioArrayAppendNumber(temp_array, w0);
+        for (i ++; i < 65536 && pdfioArrayGetSize(temp_array) < 8191; i ++, w0 = w1)
+        {
+          if ((w1 = ttfGetWidth(font, (int)i)) == w0 && i < 65530)
+          {
+            for (j = 1; j < 4; j ++)
+            {
+              if (ttfGetWidth(font, (int)(i + j)) != w0)
+                break;
+            }
+
+            if (j >= 4)
+	      break;
+	  }
+
+	  pdfioArrayAppendNumber(temp_array, w1);
+        }
+
+        pdfioArrayAppendArray(w_array, temp_array);
+      }
+    }
+
+    // Then the dictionary for the CID base font...
+    pdfioDictSetName(type2, "Type", "Font");
+    pdfioDictSetName(type2, "Subtype", "CIDFontType2");
+    pdfioDictSetName(type2, "BaseFont", basefont);
+    pdfioDictSetDict(type2, "CIDSystemInfo", sidict);
+    pdfioDictSetObj(type2, "CIDToGIDMap", cid2gid_obj);
+    pdfioDictSetObj(type2, "FontDescriptor", desc_obj);
+    pdfioDictSetArray(type2, "W", w_array);
+
+    if ((type2_obj = pdfioFileCreateObj(file_obj->pdf, type2)) == NULL)
+      goto done;
+
+    pdfioObjClose(type2_obj);
+
+    // Create a Type 0 font object...
+    if ((descendants = pdfioArrayCreate(file_obj->pdf)) == NULL)
+      goto done;
+
+    pdfioArrayAppendObj(descendants, type2_obj);
+
+    if ((dict = pdfioDictCreate(file_obj->pdf)) == NULL)
+      goto done;
+
+    pdfioDictSetName(dict, "Type", "Font");
+    pdfioDictSetName(dict, "Subtype", "Type0");
+    pdfioDictSetName(dict, "BaseFont", basefont);
+    pdfioDictSetArray(dict, "DescendantFonts", descendants);
+    pdfioDictSetName(dict, "Encoding", "Identity-H");
+    pdfioDictSetObj(dict, "ToUnicode", to_unicode_obj);
+
+    if ((obj = pdfioFileCreateObj(file_obj->pdf, dict)) != NULL)
+      pdfioObjClose(obj);
+  }
+  else
+  {
+    // Simple (CP1282 or custom encoding) 8-bit font...
+    int			ch;		// Character
+    pdfio_array_t	*w_array;	// Widths array
+
+    if (ttfGetMaxChar(font) >= 255 && !file_obj->pdf->cp1252_obj && !create_cp1252(file_obj->pdf))
+      goto done;
+
+    // Create a TrueType font object...
+    if ((dict = pdfioDictCreate(file_obj->pdf)) == NULL)
+      goto done;
+
+    pdfioDictSetName(dict, "Type", "Font");
+    pdfioDictSetName(dict, "Subtype", "TrueType");
+    pdfioDictSetName(dict, "BaseFont", basefont);
+    pdfioDictSetNumber(dict, "FirstChar", 32);
+    if (ttfGetMaxChar(font) >= 255)
+    {
+      pdfioDictSetObj(dict, "Encoding", file_obj->pdf->cp1252_obj);
+      pdfioDictSetNumber(dict, "LastChar", 255);
+    }
+    else
+    {
+      pdfioDictSetNumber(dict, "LastChar", ttfGetMaxChar(font));
+    }
+
+    // Build a Widths array for CP1252/WinAnsiEncoding
+    if ((w_array = pdfioArrayCreate(file_obj->pdf)) == NULL)
+      goto done;
+
+    for (ch = 32; ch < 256 && ch < ttfGetMaxChar(font); ch ++)
+    {
+      if (ch >= 0x80 && ch < 0xa0)
+	pdfioArrayAppendNumber(w_array, ttfGetWidth(font, _pdfio_cp1252[ch - 0x80]));
+      else
+	pdfioArrayAppendNumber(w_array, ttfGetWidth(font, ch));
+    }
+
+    pdfioDictSetArray(dict, "Widths", w_array);
+
+    pdfioDictSetObj(dict, "FontDescriptor", desc_obj);
+
+    if ((obj = pdfioFileCreateObj(file_obj->pdf, dict)) != NULL)
+      pdfioObjClose(obj);
+  }
+
+  done:
+
+  _pdfioObjSetExtension(obj, font, (_pdfio_extfree_t)ttfDelete);
+
+  return (obj);
+}
+
+
 //
 // 'create_image()' - Create an image object from some data.
 //

pdfio-content.h

@@ -128,6 +128,7 @@ extern bool		pdfioContentTextShowJustified(pdfio_stream_t *st, bool unicode, siz
 
 // Resource helpers...
 extern pdfio_obj_t	*pdfioFileCreateFontObjFromBase(pdfio_file_t *pdf, const char *name) _PDFIO_PUBLIC;
+extern pdfio_obj_t	*pdfioFileCreateFontObjFromData(pdfio_file_t *pdf, const void *data, size_t datasize, bool unicode) _PDFIO_PUBLIC;
 extern pdfio_obj_t	*pdfioFileCreateFontObjFromFile(pdfio_file_t *pdf, const char *filename, bool unicode) _PDFIO_PUBLIC;
 extern pdfio_obj_t	*pdfioFileCreateICCObjFromData(pdfio_file_t *pdf, const unsigned char *data, size_t datalen, size_t num_colors) _PDFIO_PUBLIC;
 extern pdfio_obj_t	*pdfioFileCreateICCObjFromFile(pdfio_file_t *pdf, const char *filename, size_t num_colors) _PDFIO_PUBLIC;

pdfio.h

@@ -23,9 +23,9 @@ extern "C" {
 // Version numbers...
 //
 
-#  define PDFIO_VERSION		"1.5.2"
+#  define PDFIO_VERSION		"1.6.0"
 #  define PDFIO_VERSION_MAJOR	1
-#  define PDFIO_VERSION_MINOR	5
+#  define PDFIO_VERSION_MINOR	6
 
 
 //

pdfio_native.nuspec

@@ -3,7 +3,7 @@
     <metadata>
         <id>pdfio_native</id>
         <title>PDFio Library for VS2019+</title>
-        <version>1.5.1</version>
+        <version>1.6.0</version>
         <authors>Michael R Sweet</authors>
         <owners>michaelrsweet</owners>
         <projectUrl>https://github.com/michaelrsweet/pappl</projectUrl>
@@ -16,7 +16,7 @@
         <copyright>Copyright © 2019-2025 by Michael R Sweet</copyright>
         <tags>pdf file native</tags>
 	<dependencies>
-	    <dependency id="pdfio_native.redist" version="1.5.1" />
+	    <dependency id="pdfio_native.redist" version="1.6.0" />
 	    <dependency id="libpng_native.redist" version="1.6.30" />
 	    <dependency id="zlib_native.redist" version="1.2.11" />
 	</dependencies>

pdfio_native.redist.nuspec

@@ -3,7 +3,7 @@
     <metadata>
         <id>pdfio_native.redist</id>
         <title>PDFio Library for VS2019+</title>
-        <version>1.5.1</version>
+        <version>1.6.0</version>
         <authors>Michael R Sweet</authors>
         <owners>michaelrsweet</owners>
         <projectUrl>https://github.com/michaelrsweet/pappl</projectUrl>

testttf.c

@@ -3,7 +3,7 @@
 //
 //     https://github.com/michaelrsweet/ttf
 //
-// Copyright © 2018-2024 by Michael R Sweet.
+// Copyright © 2018-2025 by Michael R Sweet.
 //
 // Licensed under Apache License v2.0.  See the file "LICENSE" for more
 // information.
@@ -14,6 +14,10 @@
 //
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
 #include "ttf.h"
 
 
@@ -81,9 +85,13 @@ test_font(const char *filename)		// I - Font filename
   int		i,			// Looping var
 		errors = 0;		// Number of errors
   ttf_t		*font;			// Font
+  struct stat	fileinfo;		// Font file information
+  FILE		*fp = NULL;		// File pointer
+  void		*data = NULL;		// Memory buffer for font file
   const char	*value;			// Font (string) value
   int		intvalue;		// Font (integer) value
   float		realvalue;		// Font (real) value
+  char		psname[1024];		// Postscript font name
   ttf_rect_t	bounds;			// Bounds
   ttf_rect_t	extents;		// Extents
   size_t	num_fonts;		// Number of fonts
@@ -220,6 +228,9 @@ test_font(const char *filename)		// I - Font filename
   if ((value = ttfGetPostScriptName(font)) != NULL)
   {
     printf("PASS (%s)\n", value);
+
+    strncpy(psname, value, sizeof(psname) - 1);
+    psname[sizeof(psname) - 1] = '\0';
   }
   else
   {
@@ -300,6 +311,86 @@ test_font(const char *filename)		// I - Font filename
     puts("PASS (false)");
 
   ttfDelete(font);
+  font = NULL;
+
+  // Now copy the font to memory and open it that way...
+  printf("fopen(\"%s\", \"rb\"): ", filename);
+  if ((fp = fopen(filename, "rb")) == NULL)
+  {
+    printf("FAIL (%s)\n", strerror(errno));
+    errors ++;
+  }
+  else
+  {
+    printf("PASS (%d)\n", fileno(fp));
+    printf("fstat(%d): ", fileno(fp));
+    if (fstat(fileno(fp), &fileinfo))
+    {
+      printf("FAIL (%s)\n", strerror(errno));
+      errors ++;
+    }
+    else
+    {
+      printf("PASS (%lu bytes)\n", (unsigned long)fileinfo.st_size);
+
+      fputs("malloc(): ", stdout);
+      if ((data = malloc((size_t)fileinfo.st_size)) == NULL)
+      {
+	printf("FAIL (%s)\n", strerror(errno));
+	errors ++;
+      }
+      else
+      {
+	puts("PASS");
+        fputs("fread(): ", stdout);
+        if (fread(data, (size_t)fileinfo.st_size, 1, fp) != 1)
+        {
+	  printf("FAIL (%s)\n", strerror(errno));
+	  errors ++;
+        }
+        else
+        {
+          puts("PASS");
+          fputs("ttfCreateData(): ", stdout);
+          if ((font = ttfCreateData(data, (size_t)fileinfo.st_size, /*idx*/0, error_cb, /*err_data*/NULL)) == NULL)
+          {
+            puts("FAIL");
+            errors ++;
+          }
+          else
+          {
+            puts("PASS");
+
+	    fputs("ttfGetPostScriptName: ", stdout);
+	    if ((value = ttfGetPostScriptName(font)) != NULL)
+	    {
+	      if (!strcmp(value, psname))
+	      {
+		printf("PASS (%s)\n", value);
+	      }
+	      else
+	      {
+		printf("FAIL (got \"%s\", expected \"%s\")\n", value, psname);
+		errors ++;
+	      }
+	    }
+	    else
+	    {
+	      puts("FAIL");
+	      errors ++;
+	    }
+          }
+        }
+      }
+    }
+
+    if (fp)
+      fclose(fp);
+
+    free(data);
+
+    ttfDelete(font);
+  }
 
   return (errors);
 }

ttf.c

@@ -177,9 +177,19 @@ typedef struct _ttf_off_names_s		// OFF/TTF naming table
   unsigned	storage_size;		// Size of storage area
 } _ttf_off_names_t;
 
+typedef size_t (*_ttf_read_cb_t)(ttf_t *font, void *buffer, size_t bytes);
+				// Font read callback, returns number of bytes read
+typedef bool (*_ttf_seek_cb_t)(ttf_t *font, size_t offset);
+				// Font seek callback, returns `true` on success
+
 struct _ttf_s
 {
-  int		fd;			// File descriptor
+  _ttf_read_cb_t read_cb;		// Read callback
+  _ttf_seek_cb_t seek_cb;		// Seek callback
+  int		file_fd;		// File descriptor for ttfCreate
+  const char	*data;			// Font data for ttfCreateData
+  size_t	data_size;		// Size of font data for ttfCreateData
+  size_t	data_offset;		// Offset within input
   size_t	idx;			// Font number in file
   ttf_err_cb_t	err_cb;			// Error callback, if any
   void		*err_data;		// Error callback data
@@ -282,7 +292,12 @@ typedef struct _ttf_off_post_s		// PostScript information
 //
 
 static char	*copy_name(ttf_t *font, unsigned name_id);
+static ttf_t	*create_font(const char *filename, const void *data, size_t datasize, size_t idx, ttf_err_cb_t err_cb, void *err_data);
 static void	errorf(ttf_t *font, const char *message, ...) TTF_FORMAT_ARGS(2,3);
+static size_t	fd_read_cb(ttf_t *font, void *buffer, size_t bytes);
+static bool	fd_seek_cb(ttf_t *font, size_t offset);
+static size_t	mem_read_cb(ttf_t *font, void *buffer, size_t bytes);
+static bool	mem_seek_cb(ttf_t *font, size_t offset);
 static bool	read_cmap(ttf_t *font);
 static bool	read_head(ttf_t *font, _ttf_off_head_t *head);
 static bool	read_hhea(ttf_t *font, _ttf_off_hhea_t *hhea);
@@ -329,15 +344,6 @@ ttfCreate(const char   *filename,	// I - Filename
           ttf_err_cb_t err_cb,		// I - Error callback or `NULL` to log to stderr
           void         *err_data)	// I - Error callback data
 {
-  ttf_t			*font = NULL;	// New font object
-  size_t		i;		// Looping var
-  _ttf_metric_t		*widths = NULL;	// Glyph metrics
-  _ttf_off_head_t	head;		// head table
-  _ttf_off_hhea_t	hhea;		// hhea table
-  _ttf_off_os_2_t	os_2;		// OS/2 table
-  _ttf_off_post_t	post;		// PostScript table
-
-
   TTF_DEBUG("ttfCreate(filename=\"%s\", idx=%u, err_cb=%p, err_data=%p)\n", filename, (unsigned)idx, err_cb, err_data);
 
   // Range check input..
@@ -347,178 +353,57 @@ ttfCreate(const char   *filename,	// I - Filename
     return (NULL);
   }
 
-  // Allocate memory...
+  // Open and return the font...
-  if ((font = (ttf_t *)calloc(1, sizeof(ttf_t))) == NULL)
+  return (create_font(filename, /*data*/NULL, /*datasize*/0, idx, err_cb, err_data));
+}
+
+
+//
+// 'ttfCreateData()' - Create a new font object from a memory buffer.
+//
+// This function creates a new font object from a memory buffer.  The "data"
+// argument specifies a pointer to the first byte of data and the "datasize"
+// argument specifies the length of the memory buffer in bytes.
+//
+// > Note: The caller is responsible for ensuring that the memory buffer is
+// > available until the font object is deleted with @link ttfDelete@.
+//
+// The "idx" argument specifies the font to load from a collection - the first
+// font is number `0`.  Once created, you can call the @link ttfGetNumFonts@
+// function to determine whether the loaded font file is a collection with more
+// than one font.
+//
+// The "err_cb" and "err_data" arguments specify a callback function and data
+// pointer for receiving error messages.  If `NULL`, errors are sent to the
+// `stderr` file.  The callback function receives the data pointer and a text
+// message string, for example:
+//
+// ```
+// void my_err_cb(void *err_data, const char *message)
+// {
+//   fprintf(stderr, "ERROR: %s\n", message);
+// }
+// ```
+//
+
+ttf_t *					// O - New font object
+ttfCreateData(const void   *data,	// I - Buffer
+              size_t       datasize,	// I - Size of buffer in bytes
+	      size_t       idx,		// I - Font number to create in collection (0-based)
+	      ttf_err_cb_t err_cb,	// I - Error callback or `NULL` to log to stderr
+	      void         *err_data)	// I - Error callback data
+{
+  TTF_DEBUG("ttfCreateData(data=%p, datasize=%lu, idx=%u, err_cb=%p, err_data=%p)\n", data, (unsigned long)datasize, (unsigned)idx, err_cb, err_data);
+
+  // Range check input..
+  if (!data || datasize == 0)
+  {
+    errno = EINVAL;
     return (NULL);
-
-  font->idx      = idx;
-  font->err_cb   = err_cb;
-  font->err_data = err_data;
-
-  // Open the font file...
-  if ((font->fd = open(filename, O_RDONLY | O_BINARY)) < 0)
-  {
-    errorf(font, "Unable to open '%s': %s", filename, strerror(errno));
-    goto error;
   }
 
-  TTF_DEBUG("ttfCreate: fd=%d\n", font->fd);
+  // Open and return the font...
-
+  return (create_font(/*filename*/NULL, data, datasize, idx, err_cb, err_data));
-  // Read the table of contents and the identifying names...
-  if (!read_table(font))
-    goto error;
-
-  TTF_DEBUG("ttfCreate: num_entries=%d\n", font->table.num_entries);
-
-  if (!read_names(font))
-    goto error;
-
-  TTF_DEBUG("ttfCreate: num_names=%d\n", font->names.num_names);
-
-  // Copy key font meta data strings...
-  font->copyright       = copy_name(font, TTF_OFF_Copyright);
-  font->family          = copy_name(font, TTF_OFF_FontFamily);
-  font->postscript_name = copy_name(font, TTF_OFF_PostScriptName);
-  font->version         = copy_name(font, TTF_OFF_FontVersion);
-
-  if (read_post(font, &post))
-  {
-    font->italic_angle = post.italicAngle;
-    font->is_fixed     = post.isFixedPitch != 0;
-  }
-
-  TTF_DEBUG("ttfCreate: copyright=\"%s\"\n", font->copyright);
-  TTF_DEBUG("ttfCreate: family=\"%s\"\n", font->family);
-  TTF_DEBUG("ttfCreate: postscript_name=\"%s\"\n", font->postscript_name);
-  TTF_DEBUG("ttfCreate: version=\"%s\"\n", font->version);
-  TTF_DEBUG("ttfCreate: italic_angle=%g\n", font->italic_angle);
-  TTF_DEBUG("ttfCreate: is_fixed=%s\n", font->is_fixed ? "true" : "false");
-
-  if (!read_cmap(font))
-    goto error;
-
-  if (!read_head(font, &head))
-    goto error;
-
-  font->units = (float)head.unitsPerEm;
-  font->x_max = head.xMax;
-  font->x_min = head.xMin;
-  font->y_max = head.yMax;
-  font->y_min = head.yMin;
-
-  if (head.macStyle & TTF_OFF_macStyle_Italic)
-  {
-    if (font->postscript_name && strstr(font->postscript_name, "Oblique"))
-      font->style = TTF_STYLE_OBLIQUE;
-    else
-      font->style = TTF_STYLE_ITALIC;
-  }
-  else
-    font->style = TTF_STYLE_NORMAL;
-
-  if (!read_hhea(font, &hhea))
-    goto error;
-
-  font->ascent  = hhea.ascender;
-  font->descent = hhea.descender;
-
-  if (read_maxp(font) < 0)
-    goto error;
-
-  if (hhea.numberOfHMetrics > 0)
-  {
-    if ((widths = read_hmtx(font, &hhea)) == NULL)
-      goto error;
-  }
-  else
-  {
-    errorf(font, "Number of horizontal metrics is 0.");
-    goto error;
-  }
-
-  if (read_os_2(font, &os_2))
-  {
-    // Copy key values from OS/2 table...
-    static const ttf_stretch_t stretches[] =
-    {
-      TTF_STRETCH_ULTRA_CONDENSED,	// ultra-condensed
-      TTF_STRETCH_EXTRA_CONDENSED,	// extra-condensed
-      TTF_STRETCH_CONDENSED,		// condensed
-      TTF_STRETCH_SEMI_CONDENSED,	// semi-condensed
-      TTF_STRETCH_NORMAL,		// normal
-      TTF_STRETCH_SEMI_EXPANDED,	// semi-expanded
-      TTF_STRETCH_EXPANDED,		// expanded
-      TTF_STRETCH_EXTRA_EXPANDED,	// extra-expanded
-      TTF_STRETCH_ULTRA_EXPANDED	// ultra-expanded
-    };
-
-    if (os_2.usWidthClass >= 1 && os_2.usWidthClass <= (int)(sizeof(stretches) / sizeof(stretches[0])))
-      font->stretch = stretches[os_2.usWidthClass - 1];
-
-    font->weight     = (short)os_2.usWeightClass;
-    font->cap_height = os_2.sCapHeight;
-    font->x_height   = os_2.sxHeight;
-  }
-  else
-  {
-    // Default key values since there isn't an OS/2 table...
-    TTF_DEBUG("ttfCreate: Unable to read OS/2 table.\n");
-
-    font->weight = 400;
-  }
-
-  if (font->cap_height == 0)
-    font->cap_height = font->ascent;
-
-  if (font->x_height == 0)
-    font->x_height = 3 * font->ascent / 5;
-
-  // Build a sparse glyph widths table...
-  font->min_char = -1;
-
-  for (i = 0; i < font->num_cmap; i ++)
-  {
-    if (font->cmap[i] >= 0)
-    {
-      int	bin = (int)i / 256,	// Sub-array bin
-		glyph = font->cmap[i];	// Glyph index
-
-      // Update min/max...
-      if (font->min_char < 0)
-        font->min_char = (int)i;
-
-      font->max_char = (int)i;
-
-      // Allocate a sub-array as needed...
-      if (!font->widths[bin])
-        font->widths[bin] = (_ttf_metric_t *)calloc(256, sizeof(_ttf_metric_t));
-
-      // Copy the width of the specified glyph or the last one if we are past
-      // the end of the table...
-      if (glyph >= hhea.numberOfHMetrics)
-	font->widths[bin][i & 255] = widths[hhea.numberOfHMetrics - 1];
-      else
-	font->widths[bin][i & 255] = widths[glyph];
-    }
-
-#ifdef DEBUG
-    if (i >= ' ' && i < 127 && font->widths[0])
-      TTF_DEBUG("ttfCreate: width['%c']=%d(%d)\n", (char)i, font->widths[0][i].width, font->widths[0][i].left_bearing);
-#endif // DEBUG
-  }
-
-  // Cleanup and return the font...
-  free(widths);
-
-  return (font);
-
-  // If we get here something bad happened...
-  error:
-
-  free(widths);
-  ttfDelete(font);
-
-  return (NULL);
 }
 
 
@@ -537,8 +422,8 @@ ttfDelete(ttf_t *font)			// I - Font
     return;
 
   // Close the font file...
-  if (font->fd >= 0)
+  if (font->file_fd >= 0)
-    close(font->fd);
+    close(font->file_fd);
 
   // Free all memory used...
   free(font->copyright);
@@ -1043,6 +928,219 @@ copy_name(ttf_t    *font,		// I - Font
 }
 
 
+//
+// 'create_font()' - Create a font object from the file or data.
+//
+
+static ttf_t *
+create_font(const char   *filename,	// I - Filename of `NULL`
+            const void   *data,		// I - Data pointer or `NULL`
+            size_t       datasize,	// I - Size of data or 0
+            size_t       idx,		// I - Font index
+            ttf_err_cb_t err_cb,	// I - Error callback function
+            void         *err_data)	// I - Error callback data
+{
+  ttf_t			*font = NULL;	// New font object
+  size_t		i;		// Looping var
+  _ttf_metric_t		*widths = NULL;	// Glyph metrics
+  _ttf_off_head_t	head;		// head table
+  _ttf_off_hhea_t	hhea;		// hhea table
+  _ttf_off_os_2_t	os_2;		// OS/2 table
+  _ttf_off_post_t	post;		// PostScript table
+
+
+  TTF_DEBUG("create_font(filename=\"%s\", data=%p, datasize=%lu, idx=%u, err_cb=%p, err_data=%p)\n", filename, data, (unsigned long)datasize, (unsigned)idx, err_cb, err_data);
+
+  // Allocate memory...
+  if ((font = (ttf_t *)calloc(1, sizeof(ttf_t))) == NULL)
+    return (NULL);
+
+  font->idx      = idx;
+  font->err_cb   = err_cb;
+  font->err_data = err_data;
+
+  if (filename)
+  {
+    // Open the font file...
+    if ((font->file_fd = open(filename, O_RDONLY | O_BINARY)) < 0)
+    {
+      errorf(font, "Unable to open '%s': %s", filename, strerror(errno));
+      goto error;
+    }
+
+    TTF_DEBUG("create_font: file_fd=%d\n", font->file_fd);
+
+    font->read_cb   = fd_read_cb;
+    font->seek_cb   = fd_seek_cb;
+  }
+  else
+  {
+    // Read from memory...
+    font->file_fd   = -1;
+    font->data      = (const char *)data;
+    font->data_size = datasize;
+    font->read_cb   = mem_read_cb;
+    font->seek_cb   = mem_seek_cb;
+  }
+
+  // Read the table of contents and the identifying names...
+  if (!read_table(font))
+    goto error;
+
+  TTF_DEBUG("create_font: num_entries=%d\n", font->table.num_entries);
+
+  if (!read_names(font))
+    goto error;
+
+  TTF_DEBUG("create_font: num_names=%d\n", font->names.num_names);
+
+  // Copy key font meta data strings...
+  font->copyright       = copy_name(font, TTF_OFF_Copyright);
+  font->family          = copy_name(font, TTF_OFF_FontFamily);
+  font->postscript_name = copy_name(font, TTF_OFF_PostScriptName);
+  font->version         = copy_name(font, TTF_OFF_FontVersion);
+
+  if (read_post(font, &post))
+  {
+    font->italic_angle = post.italicAngle;
+    font->is_fixed     = post.isFixedPitch != 0;
+  }
+
+  TTF_DEBUG("create_font: copyright=\"%s\"\n", font->copyright);
+  TTF_DEBUG("create_font: family=\"%s\"\n", font->family);
+  TTF_DEBUG("create_font: postscript_name=\"%s\"\n", font->postscript_name);
+  TTF_DEBUG("create_font: version=\"%s\"\n", font->version);
+  TTF_DEBUG("create_font: italic_angle=%g\n", font->italic_angle);
+  TTF_DEBUG("create_font: is_fixed=%s\n", font->is_fixed ? "true" : "false");
+
+  if (!read_cmap(font))
+    goto error;
+
+  if (!read_head(font, &head))
+    goto error;
+
+  font->units = (float)head.unitsPerEm;
+  font->x_max = head.xMax;
+  font->x_min = head.xMin;
+  font->y_max = head.yMax;
+  font->y_min = head.yMin;
+
+  if (head.macStyle & TTF_OFF_macStyle_Italic)
+  {
+    if (font->postscript_name && strstr(font->postscript_name, "Oblique"))
+      font->style = TTF_STYLE_OBLIQUE;
+    else
+      font->style = TTF_STYLE_ITALIC;
+  }
+  else
+    font->style = TTF_STYLE_NORMAL;
+
+  if (!read_hhea(font, &hhea))
+    goto error;
+
+  font->ascent  = hhea.ascender;
+  font->descent = hhea.descender;
+
+  if (read_maxp(font) < 0)
+    goto error;
+
+  if (hhea.numberOfHMetrics > 0)
+  {
+    if ((widths = read_hmtx(font, &hhea)) == NULL)
+      goto error;
+  }
+  else
+  {
+    errorf(font, "Number of horizontal metrics is 0.");
+    goto error;
+  }
+
+  if (read_os_2(font, &os_2))
+  {
+    // Copy key values from OS/2 table...
+    static const ttf_stretch_t stretches[] =
+    {
+      TTF_STRETCH_ULTRA_CONDENSED,	// ultra-condensed
+      TTF_STRETCH_EXTRA_CONDENSED,	// extra-condensed
+      TTF_STRETCH_CONDENSED,		// condensed
+      TTF_STRETCH_SEMI_CONDENSED,	// semi-condensed
+      TTF_STRETCH_NORMAL,		// normal
+      TTF_STRETCH_SEMI_EXPANDED,	// semi-expanded
+      TTF_STRETCH_EXPANDED,		// expanded
+      TTF_STRETCH_EXTRA_EXPANDED,	// extra-expanded
+      TTF_STRETCH_ULTRA_EXPANDED	// ultra-expanded
+    };
+
+    if (os_2.usWidthClass >= 1 && os_2.usWidthClass <= (int)(sizeof(stretches) / sizeof(stretches[0])))
+      font->stretch = stretches[os_2.usWidthClass - 1];
+
+    font->weight     = (short)os_2.usWeightClass;
+    font->cap_height = os_2.sCapHeight;
+    font->x_height   = os_2.sxHeight;
+  }
+  else
+  {
+    // Default key values since there isn't an OS/2 table...
+    TTF_DEBUG("create_font: Unable to read OS/2 table.\n");
+
+    font->weight = 400;
+  }
+
+  if (font->cap_height == 0)
+    font->cap_height = font->ascent;
+
+  if (font->x_height == 0)
+    font->x_height = 3 * font->ascent / 5;
+
+  // Build a sparse glyph widths table...
+  font->min_char = -1;
+
+  for (i = 0; i < font->num_cmap; i ++)
+  {
+    if (font->cmap[i] >= 0)
+    {
+      int	bin = (int)i / 256,	// Sub-array bin
+		glyph = font->cmap[i];	// Glyph index
+
+      // Update min/max...
+      if (font->min_char < 0)
+        font->min_char = (int)i;
+
+      font->max_char = (int)i;
+
+      // Allocate a sub-array as needed...
+      if (!font->widths[bin])
+        font->widths[bin] = (_ttf_metric_t *)calloc(256, sizeof(_ttf_metric_t));
+
+      // Copy the width of the specified glyph or the last one if we are past
+      // the end of the table...
+      if (glyph >= hhea.numberOfHMetrics)
+	font->widths[bin][i & 255] = widths[hhea.numberOfHMetrics - 1];
+      else
+	font->widths[bin][i & 255] = widths[glyph];
+    }
+
+#ifdef DEBUG
+    if (i >= ' ' && i < 127 && font->widths[0])
+      TTF_DEBUG("create_font: width['%c']=%d(%d)\n", (char)i, font->widths[0][i].width, font->widths[0][i].left_bearing);
+#endif // DEBUG
+  }
+
+  // Cleanup and return the font...
+  free(widths);
+
+  return (font);
+
+  // If we get here something bad happened...
+  error:
+
+  free(widths);
+  ttfDelete(font);
+
+  return (NULL);
+}
+
+
 //
 // 'errorf()' - Show an error message.
 //
@@ -1070,9 +1168,85 @@ errorf(ttf_t      *font,		// I - Font
 }
 
 
-/*
+//
- * 'read_cmap()' - Read the cmap table, getting the Unicode mapping table.
+// 'fd_read_cb()' - Read from a file.
- */
+//
+
+static size_t				// O - Number of bytes read
+fd_read_cb(ttf_t  *font,		// I - Font
+           void   *buffer,		// I - Read buffer
+	   size_t bytes)		// I - Number of bytes to read
+{
+  ssize_t	rbytes;			// Bytes read
+
+
+  if ((rbytes = read(font->file_fd, buffer, bytes)) < 0)
+    return (0);
+
+  return ((size_t)rbytes);
+}
+
+
+//
+// 'fd_seek_cb()' - Seek in a file.
+//
+
+static bool				// O - `true` on success, `false` on failure
+fd_seek_cb(ttf_t  *font,		// I - Font
+           size_t offset)		// I - Offset in data
+{
+  return (lseek(font->file_fd, offset, SEEK_SET) == offset);
+}
+
+
+//
+// 'mem_read_cb()' - Read from a memory buffer.
+//
+
+static size_t				// O - Number of bytes read
+mem_read_cb(ttf_t  *font,		// I - Font
+            void   *buffer,		// I - Read buffer
+	    size_t bytes)		// I - Number of bytes to read
+{
+  size_t	rbytes;			// Bytes to copy
+
+
+  if (font->data_offset >= font->data_size)
+    return (0);
+
+  if ((rbytes = font->data_size - font->data_offset) > bytes)
+    rbytes = bytes;
+
+  memcpy(buffer, font->data + font->data_offset, rbytes);
+  font->data_offset += rbytes;
+
+  return (rbytes);
+}
+
+
+//
+// 'mem_seek_cb()' - Seek in a memory buffer.
+//
+
+static bool				// O - `true` on success, `false` on error
+mem_seek_cb(ttf_t  *font,		// I - Font
+            size_t offset)		// I - Offset in data
+{
+  if (offset >= font->data_size)
+  {
+    errno = ENXIO;
+    return (false);
+  }
+
+  font->data_offset = offset;
+
+  return (true);
+}
+
+
+//
+// 'read_cmap()' - Read the cmap table, getting the Unicode mapping table.
+//
 
 static bool				// O - `true` on success, `false` on error
 read_cmap(ttf_t *font)			// I - Font
@@ -1219,7 +1393,7 @@ read_cmap(ttf_t *font)			// I - Font
 	    return (false);
 	  }
 
-          if (read(font->fd, bmap, font->num_cmap) != (ssize_t)font->num_cmap)
+          if ((font->read_cb)(font, bmap, font->num_cmap) != font->num_cmap)
           {
 	    errorf(font, "Unable to read cmap table length at offset %u.", coffset);
 	    return (false);
@@ -1646,9 +1820,9 @@ read_hhea(ttf_t           *font,	// I - Font
 }
 
 
-/*
+//
- * 'read_hmtx()' - Read the horizontal metrics from the font.
+// 'read_hmtx()' - Read the horizontal metrics from the font.
- */
+//
 
 static _ttf_metric_t *			// O - Array of glyph metrics
 read_hmtx(ttf_t           *font,	// I - Font
@@ -1774,7 +1948,7 @@ read_names(ttf_t *font)			// I - Font
 
   length -= (unsigned)offset;
 
-  if (read(font->fd, font->names.storage, length) < 0)
+  if ((font->read_cb)(font, font->names.storage, length) == 0)
   {
     errorf(font, "Unable to read name table: %s", strerror(errno));
     return (false);
@@ -1823,7 +1997,7 @@ read_os_2(ttf_t           *font,	// I - Font
   /* yStrikeoutOffset */    read_short(font);
   /* sFamilyClass */        read_short(font);
   /* panose[10] */
-  if (read(font->fd, panose, sizeof(panose)) != (ssize_t)sizeof(panose))
+  if ((font->read_cb)(font, panose, sizeof(panose)) != sizeof(panose))
     return (false);
   /* ulUnicodeRange1 */     read_ulong(font);
   /* ulUnicodeRange2 */     read_ulong(font);
@@ -1885,7 +2059,7 @@ read_short(ttf_t *font)			// I - Font
   unsigned char	buffer[2];		// Read buffer
 
 
-  if (read(font->fd, buffer, sizeof(buffer)) != sizeof(buffer))
+  if ((font->read_cb)(font, buffer, sizeof(buffer)) != sizeof(buffer))
     return (EOF);
   else if (buffer[0] & 0x80)
     return (((buffer[0] << 8) | buffer[1]) - 65536);
@@ -1958,7 +2132,7 @@ read_table(ttf_t  *font)		// I - Font
 
     TTF_DEBUG("read_table: Offset for font %u is %u.\n", (unsigned)font->idx, temp);
 
-    if (lseek(font->fd, temp + 4, SEEK_SET) < 0)
+    if (!(font->seek_cb)(font, temp + 4))
     {
       errorf(font, "Unable to seek to font %u: %s", (unsigned)font->idx, strerror(errno));
       return (false);
@@ -2034,7 +2208,7 @@ read_ulong(ttf_t *font)			// I - Font
   unsigned char	buffer[4];		// Read buffer
 
 
-  if (read(font->fd, buffer, sizeof(buffer)) != sizeof(buffer))
+  if ((font->read_cb)(font, buffer, sizeof(buffer)) != sizeof(buffer))
     return ((unsigned)EOF);
   else
     return ((unsigned)((buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]));
@@ -2051,7 +2225,7 @@ read_ushort(ttf_t *font)		// I - Font
   unsigned char	buffer[2];		// Read buffer
 
 
-  if (read(font->fd, buffer, sizeof(buffer)) != sizeof(buffer))
+  if ((font->read_cb)(font, buffer, sizeof(buffer)) != sizeof(buffer))
     return (EOF);
   else
     return ((buffer[0] << 8) | buffer[1]);
@@ -2078,7 +2252,7 @@ seek_table(ttf_t    *font,		// I - Font
     if (current->tag == tag)
     {
       // Found it, seek and return...
-      if (lseek(font->fd, current->offset + offset, SEEK_SET) == (current->offset + offset))
+      if ((font->seek_cb)(font, current->offset + offset))
       {
         // Successful seek...
         return (current->length - offset);

ttf.h

@@ -3,7 +3,7 @@
 //
 //     https://github.com/michaelrsweet/ttf
 //
-// Copyright © 2018-2024 by Michael R Sweet.
+// Copyright © 2018-2025 by Michael R Sweet.
 //
 // Licensed under Apache License v2.0.  See the file "LICENSE" for more
 // information.
@@ -81,6 +81,7 @@ typedef struct ttf_rect_s	// Bounding rectangle
 //
 
 extern ttf_t		*ttfCreate(const char *filename, size_t idx, ttf_err_cb_t err_cb, void *err_data);
+extern ttf_t		*ttfCreateData(const void *data, size_t data_size, size_t idx, ttf_err_cb_t err_cb, void *err_data);
 extern void		ttfDelete(ttf_t *font);
 extern int		ttfGetAscent(ttf_t *font);
 extern ttf_rect_t	*ttfGetBounds(ttf_t *font, ttf_rect_t *bounds);