Uses an internal TTF parser

@@ -9,3 +9,5 @@ pubspec.lock
 # Directory created by dartdoc
 # If you don't generate documentation locally you can remove this line.
 doc/api/
+
+*.pdf

+# 1.0.3
+* Remove dependency to ttf_parser
+
 # 1.0.2
 * Update sdk support for 2.0.0
+
 # 1.0.1
 * Add example
 * Lower vector_math dependency version
 * Uses better page format object
-

 # Pdf creation library for dart / flutter
 
+This is a low-level Pdf creation library.
+It can create a full multi-pages document with graphics,
+images and text using TrueType fonts.
+
+The coordinate system is using the internal Pdf system:
+ * (0.0, 0.0) is bottom-left
+ * 1.0 is defined as 1 / 72.0 inch
+ * you can use the constants for centimeters, milimeters and inch defined in PDFPageFormat
+
 Example:
 ```dart
 final pdf = new PDFDocument();
@@ -12,8 +21,30 @@ g.drawRect(50.0, 30.0, 100.0, 50.0);
 g.fillPath();
 
 g.setColor(new PDFColor(0.3, 0.3, 0.3));
-g.drawString(font, 12.0, "Hello World!", 50.0, 300.0);
+g.drawString(font, 12.0, "Hello World!", 5.0 * PDFPageFormat.MM, 300.0);
 
 var file = new File('file.pdf');
 file.writeAsBytesSync(pdf.save());
 ```
+
+To load an image it is possible to use the dart library `image`
+
+```dart
+Image image = decodeImage(new Io.File('test.webp').readAsBytesSync());
+PDFImage image = new PDFImage(
+  pdf,
+	image: img.data.buffer.asUint8List(),
+	width: img.width,
+	height: img.height);
+g.drawImage(image, 100.0, 100.0, 80.0);
+```
+
+To use a TrueType font:
+
+```dart
+PDFTTFFont ttf = new PDFTTFFont(
+  pdf,
+  (new File("open-sans.ttf").readAsBytesSync() as Uint8List).buffer.asByteData());
+g.setColor(new PDFColor(0.3, 0.3, 0.3));
+g.drawString(ttf, 20.0, "Dart is awesome", 50.0, 30.0);
+```

@@ -23,7 +23,6 @@ import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:meta/meta.dart';
-import 'package:ttf_parser/ttf_parser.dart';
 import 'package:vector_math/vector_math_64.dart';
 
 part 'src/annotation.dart';
@@ -50,6 +49,7 @@ part 'src/point.dart';
 part 'src/polygon.dart';
 part 'src/rect.dart';
 part 'src/stream.dart';
+part 'src/ttf_parser.dart';
 part 'src/ttffont.dart';
 part 'src/xobject.dart';
 part 'src/xref.dart';

@@ -20,11 +20,9 @@ part of pdf;
 
 class PDFFontDescriptor extends PDFObject {
   final PDFObjectStream file;
-  final TtfFont font;
   final PDFTTFFont ttfFont;
 
-  PDFFontDescriptor(this.ttfFont, this.file, this.font)
-      : super(ttfFont.pdfDocument, "/FontDescriptor");
+  PDFFontDescriptor(this.ttfFont, this.file) : super(ttfFont.pdfDocument, "/FontDescriptor");
 
   @override
   void prepare() {
@@ -34,9 +32,10 @@ class PDFFontDescriptor extends PDFObject {
     params["/FontFile2"] = file.ref();
     params["/Flags"] = PDFStream.intNum(32);
     params["/FontBBox"] = new PDFStream()
-      ..putStringArray([font.head.xMin, font.head.yMin, font.head.xMax, font.head.yMax]);
-    params["/Ascent"] = PDFStream.intNum(font.hhea.ascent);
-    params["/Descent"] = PDFStream.intNum(font.hhea.descent);
+      ..putStringArray(
+          [ttfFont.font.xMin, ttfFont.font.yMin, ttfFont.font.xMax, ttfFont.font.yMax]);
+    params["/Ascent"] = PDFStream.intNum(ttfFont.font.ascent);
+    params["/Descent"] = PDFStream.intNum(ttfFont.font.descent);
     params["/ItalicAngle"] = PDFStream.intNum(0);
     params["/CapHeight"] = PDFStream.intNum(10);
     params["/StemV"] = PDFStream.intNum(79);

+/*
+ * Copyright (C) 2018, David PHAM-VAN <dev.nfet.net@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+part of pdf;
+
+class TTFParser {
+  static const _HEAD = "head";
+  static const _NAME = "name";
+  static const _HMTX = "hmtx";
+  static const _HHEA = "hhea";
+  static const _CMAP = "cmap";
+  static const _MAXP = "maxp";
+  static const _LOCA = "loca";
+  static const _GLYF = "glyf";
+
+  final ByteData bytes;
+  final _tableOffsets = new Map<String, int>();
+  String _fontName;
+  final advanceWidth = new List<double>();
+  final charToGlyphIndexMap = new Map<int, int>();
+  final glyphOffsets = new List<int>();
+  final glyphInfoMap = new Map<int, PDFRect>();
+
+  TTFParser(this.bytes) {
+    final numTables = bytes.getUint16(4);
+
+    for (var i = 0; i < numTables; i++) {
+      final name = utf8.decode(bytes.buffer.asUint8List(i * 16 + 12, 4));
+      final offset = bytes.getUint32(i * 16 + 20);
+      _tableOffsets[name] = offset;
+    }
+
+    _parseFontName();
+    _parseHmtx();
+    _parseCMap();
+    _parseIndexes();
+    _parseGlyf();
+  }
+
+  get unitsPerEm => bytes.getUint16(_tableOffsets[_HEAD] + 18);
+
+  get xMin => bytes.getInt16(_tableOffsets[_HEAD] + 36);
+
+  get yMin => bytes.getInt16(_tableOffsets[_HEAD] + 38);
+
+  get xMax => bytes.getInt16(_tableOffsets[_HEAD] + 40);
+
+  get yMax => bytes.getInt16(_tableOffsets[_HEAD] + 42);
+
+  get indexToLocFormat => bytes.getInt16(_tableOffsets[_HEAD] + 50);
+
+  get ascent => bytes.getInt16(_tableOffsets[_HHEA] + 4);
+
+  get descent => bytes.getInt16(_tableOffsets[_HHEA] + 6);
+
+  get numOfLongHorMetrics => bytes.getInt16(_tableOffsets[_HHEA] + 34);
+
+  get numGlyphs => bytes.getInt16(_tableOffsets[_MAXP] + 4);
+
+  get fontName => _fontName;
+
+  void _parseFontName() {
+    final basePosition = _tableOffsets[_NAME];
+    final count = bytes.getUint16(basePosition + 2);
+    final stringOffset = bytes.getUint16(basePosition + 4);
+    int pos = basePosition + 6;
+    for (var i = 0; i < count; i++) {
+      int platformID = bytes.getUint16(pos);
+      int nameID = bytes.getUint16(pos + 6);
+      int length = bytes.getUint16(pos + 8);
+      int offset = bytes.getUint16(pos + 10);
+      pos += 12;
+      if (platformID == 1 && nameID == 6) {
+        _fontName = utf8
+            .decode(bytes.buffer.asUint8List(basePosition + stringOffset + offset, length));
+      }
+    }
+  }
+
+  void _parseHmtx() {
+    final offset = _tableOffsets[_HMTX];
+    final unitsPerEm = this.unitsPerEm;
+    for (var i = 0; i < numOfLongHorMetrics; i++) {
+      advanceWidth.add(bytes.getInt16(offset + i * 4).toDouble() / unitsPerEm);
+    }
+  }
+
+  void _parseCMap() {
+    final basePosition = _tableOffsets[_CMAP];
+    final numSubTables = bytes.getUint16(basePosition + 2);
+    for (var i = 0; i < numSubTables; i++) {
+      final offset = bytes.getUint32(basePosition + i * 8 + 8);
+      final format = bytes.getUint16(basePosition + offset);
+      final length = bytes.getUint16(basePosition + offset + 2);
+
+      switch (format) {
+        case 0:
+          _parseCMapFormat0(basePosition + offset + 4, length);
+          break;
+
+        case 4:
+          _parseCMapFormat4(basePosition + offset + 4, length);
+          break;
+        case 6:
+          _parseCMapFormat6(basePosition + offset + 4, length);
+          break;
+      }
+    }
+  }
+
+  void _parseCMapFormat0(int basePosition, int length) {
+    assert(length == 262);
+    for (var i = 0; i < 256; i++) {
+      int charCode = i;
+      int glyphIndex = bytes.getUint8(basePosition + i);
+      if (glyphIndex > 0) {
+        charToGlyphIndexMap[charCode] = glyphIndex;
+      }
+    }
+  }
+
+  void _parseCMapFormat4(int basePosition, int length) {
+    final segCount = bytes.getUint16(basePosition + 2) ~/ 2;
+    final endCodes = new List<int>();
+    for (var i = 0; i < segCount; i++) {
+      endCodes.add(bytes.getUint16(basePosition + i * 2 + 10));
+    }
+    final startCodes = new List<int>();
+    for (var i = 0; i < segCount; i++) {
+      startCodes.add(bytes.getUint16(basePosition + (segCount + i) * 2 + 12));
+    }
+    final idDeltas = new List<int>();
+    for (var i = 0; i < segCount; i++) {
+      idDeltas.add(bytes.getUint16(basePosition + (segCount * 2 + i) * 2 + 12));
+    }
+    final idRangeOffsetBasePos = basePosition + segCount * 6 + 12;
+    final idRangeOffsets = new List<int>();
+    for (var i = 0; i < segCount; i++) {
+      idRangeOffsets.add(bytes.getUint16(idRangeOffsetBasePos + i * 2));
+    }
+    for (var s = 0; s < segCount - 1; s++) {
+      final startCode = startCodes[s];
+      final endCode = endCodes[s];
+      final idDelta = idDeltas[s];
+      final idRangeOffset = idRangeOffsets[s];
+      final idRangeOffsetAddress = idRangeOffsetBasePos + s * 2;
+      for (var c = startCode; c <= endCode; c++) {
+        var glyphIndex;
+        if (idRangeOffset == 0) {
+          glyphIndex = (idDelta + c) % 65536;
+        } else {
+          final glyphIndexAddress = idRangeOffset + 2 * (c - startCode) + idRangeOffsetAddress;
+          glyphIndex = bytes.getUint16(glyphIndexAddress);
+        }
+        charToGlyphIndexMap[c] = glyphIndex;
+      }
+    }
+  }
+
+  void _parseCMapFormat6(int basePosition, int length) {
+    final firstCode = bytes.getUint16(basePosition + 2);
+    final entryCount = bytes.getUint16(basePosition + 4);
+    for (var i = 0; i < entryCount; i++) {
+      final charCode = firstCode + i;
+      final glyphIndex = bytes.getUint16(basePosition + i * 2 + 6);
+      if (glyphIndex > 0) {
+        charToGlyphIndexMap[charCode] = glyphIndex;
+      }
+    }
+  }
+
+  void _parseIndexes() {
+    final basePosition = _tableOffsets[_LOCA];
+    final numGlyphs = this.numGlyphs;
+    if (indexToLocFormat == 0) {
+      for (var i = 0; i < numGlyphs; i++) {
+        glyphOffsets.add(bytes.getUint16(basePosition + i * 2) * 2);
+      }
+    } else {
+      for (var i = 0; i < numGlyphs; i++) {
+        glyphOffsets.add(bytes.getUint32(basePosition + i * 4));
+      }
+    }
+  }
+
+  void _parseGlyf() {
+    final baseOffset = _tableOffsets[_GLYF];
+    final unitsPerEm = this.unitsPerEm;
+    int glyphIndex = 0;
+    for (var offset in glyphOffsets) {
+      final xMin = bytes.getInt16(baseOffset + offset + 2); // 2
+      final yMin = bytes.getInt16(baseOffset + offset + 4); // 4
+      final xMax = bytes.getInt16(baseOffset + offset + 6); // 6
+      final yMax = bytes.getInt16(baseOffset + offset + 8); // 8
+      glyphInfoMap[glyphIndex] = new PDFRect(
+          xMin.toDouble() / unitsPerEm,
+          yMin.toDouble() / unitsPerEm,
+          xMax.toDouble() / unitsPerEm,
+          yMax.toDouble() / unitsPerEm);
+      glyphIndex++;
+    }
+  }
+}

@@ -23,19 +23,20 @@ class PDFTTFFont extends PDFFont {
   PDFFontDescriptor descriptor;
   PDFArrayObject widthsObject;
   final widths = new List<String>();
-  TtfFont _font;
+  final TTFParser font;
   int _charMin;
   int _charMax;
 
   /// Constructs a PDFTTFFont
-  PDFTTFFont(PDFDocument pdfDocument, Uint8List bytes)
-      : super(pdfDocument, subtype: "/TrueType") {
-    _font = new TtfParser().parse(bytes);
-    baseFont = "/" + _font.name.fontName.replaceAll(" ", "");
+  PDFTTFFont(PDFDocument pdfDocument, ByteData bytes)
+      : font = new TTFParser(bytes),
+        super(pdfDocument, subtype: "/TrueType") {
+    baseFont = "/" + font.fontName.replaceAll(" ", "");
 
     PDFObjectStream file = new PDFObjectStream(pdfDocument, isBinary: true);
-    file.buf.putBytes(bytes);
-    file.params["/Length1"] = PDFStream.intNum(bytes.length);
+    final data = bytes.buffer.asUint8List();
+    file.buf.putBytes(data);
+    file.params["/Length1"] = PDFStream.intNum(data.length);
 
     _charMin = 32;
     _charMax = 255;
@@ -45,35 +46,30 @@ class PDFTTFFont extends PDFFont {
     }
 
     unicodeCMap = new PDFObject(pdfDocument);
-    descriptor = new PDFFontDescriptor(this, file, _font);
+    descriptor = new PDFFontDescriptor(this, file);
     widthsObject = new PDFArrayObject(pdfDocument, widths);
   }
 
   @override
   double glyphAdvance(int charCode) {
-    var g = _font.cmap.charToGlyphIndexMap[charCode];
+    var g = font.charToGlyphIndexMap[charCode];
 
     if (g == null) {
       return super.glyphAdvance(charCode);
     }
 
-    return _font.hmtx.metrics[g].advanceWidth / _font.head.unitsPerEm;
+    return (font.advanceWidth[g]) ?? super.glyphAdvance(charCode);
   }
 
   @override
   PDFRect glyphBounds(int charCode) {
-    var g = _font.cmap.charToGlyphIndexMap[charCode];
+    var g = font.charToGlyphIndexMap[charCode];
 
     if (g == null) {
       return super.glyphBounds(charCode);
     }
 
-    var info = _font.glyf.glyphInfoMap[g];
-    return new PDFRect(
-        info.xMin.toDouble() / _font.head.unitsPerEm,
-        info.yMin.toDouble() / _font.head.unitsPerEm,
-        (info.xMax - info.xMin).toDouble() / _font.head.unitsPerEm,
-        (info.yMax - info.yMin).toDouble() / _font.head.unitsPerEm);
+    return font.glyphInfoMap[g] ?? super.glyphBounds(charCode);
   }
 
   @override

@@ -2,14 +2,13 @@ name: pdf
 author: David PHAM-VAN <dev.nfet.net@gmail.com>
 description: A pdf producer for Dart. It can create pdf files for both web or flutter.
 homepage: https://github.com/davbfr/dart_pdf
-version: 1.0.2
+version: 1.0.3
 
 environment:
   sdk: ">=1.8.0 <3.0.0"
 
 dependencies:
   meta: "^1.1.5"
-  ttf_parser: "^1.0.0"
   vector_math: "^2.0.0"
 
 dev_dependencies:

 import 'dart:io';
 import 'dart:math';
+import 'dart:typed_data';
 
 import 'package:pdf/pdf.dart';
 import 'package:test/test.dart';
@@ -27,8 +28,11 @@ void main() {
     g.restoreContext();
     var font1 = new PDFFont(pdf);
 
-    var font2 =
-        new PDFTTFFont(pdf, new File("../assets/Nunito-Regular.ttf").readAsBytesSync());
+    var font2 = new PDFTTFFont(
+        pdf,
+        (new File("../assets/Nunito-Regular.ttf").readAsBytesSync() as Uint8List)
+            .buffer
+            .asByteData());
     var s = "Hello World!";
     var r = font2.stringBounds(s);
     const FS = 20.0;

+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:pdf/pdf.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('Pdf', () {
+    var pdf = new PDFDocument(deflate: false);
+    var i = pdf.info;
+    i.author = "David PHAM-VAN";
+    i.creator = i.author;
+    i.title = "My Title";
+    i.subject = "My Subject";
+    var page = new PDFPage(pdf, pageFormat: const PDFPageFormat(500.0, 300.0));
+
+    var g = page.getGraphics();
+    var ttf = new PDFTTFFont(
+        pdf,
+        (new File("../assets/Nunito-Regular.ttf").readAsBytesSync() as Uint8List)
+            .buffer
+            .asByteData());
+    var s = "Hello World!";
+    var r = ttf.stringBounds(s);
+    print(r);
+    const FS = 20.0;
+    g.setColor(new PDFColor(0.0, 1.0, 1.0));
+    g.drawRect(50.0 + r.x * FS, 30.0 + r.y * FS, r.w * FS, r.h * FS);
+    g.fillPath();
+    g.setColor(new PDFColor(0.3, 0.3, 0.3));
+    g.drawString(ttf, FS, s, 50.0, 30.0);
+
+    var file = new File('file.pdf');
+    file.writeAsBytesSync(pdf.save());
+  });
+}