fallbacks to true type font bounding boxes

src/UglyToad.PdfPig.Tests/Integration/SinglePageNonLatinAcrobatDistillerTests.cs

@@ -83,7 +83,7 @@
 
                     Assert.Equal(theirLetter, myLetter);
 
-                    Assert.True(Math.Abs(theirX - myX) < 2);
+                    Assert.Equal(theirX, myX, new DecimalComparer(3m));
 
                     index++;
                 }

src/UglyToad.PdfPig.Tests/Integration/SinglePageSimpleOpenOfficeTests.cs

@@ -60,7 +60,7 @@
                 Assert.Equal(709.2m, page.Letters[5].Rectangle.BottomLeft.Y, comparer);
 
                 Assert.Equal(119.82m, page.Letters[5].Rectangle.TopRight.X, comparer);
-                Assert.Equal(719.89m, page.Letters[5].Rectangle.TopRight.Y, comparer);
+                Assert.Equal(714.89m, page.Letters[5].Rectangle.TopRight.Y, comparer);
 
                 Assert.Equal("f", page.Letters[16].Value);
 

src/UglyToad.PdfPig.Tests/Integration/Type0FontTests.cs

@@ -57,8 +57,8 @@ namespace UglyToad.PdfPig.Tests.Integration
             {
                 var page = document.GetPage(1);
 
-                Assert.False((bool) page.Letters.Any(x => x.Rectangle.Width == 0));
+                Assert.True((bool) page.Letters.Any(x => x.Rectangle.Width != 0));
-                Assert.False((bool) page.Letters.Any(x => x.Rectangle.Height == 0));
+                Assert.True((bool) page.Letters.Any(x => x.Rectangle.Height != 0));
             }
         }
     }

src/UglyToad.PdfPig/Fonts/CidFonts/ICidFontProgram.cs

@@ -8,5 +8,7 @@
     internal interface ICidFontProgram
     {
         bool TryGetBoundingBox(int characterCode, out PdfRectangle boundingBox);
+
+        bool TryGetBoundingAdvancedWidth(int characterCode, out decimal width);
     }
 }

src/UglyToad.PdfPig/Fonts/Parser/Handlers/TrueTypeFontHandler.cs

@@ -42,6 +42,10 @@
 
         public IFont Generate(DictionaryToken dictionary, bool isLenientParsing)
         {
+            var firstCharacter = FontDictionaryAccessHelper.GetFirstCharacter(dictionary);
+
+            var widths = FontDictionaryAccessHelper.GetWidths(pdfScanner, dictionary, isLenientParsing);
+
             var descriptor = FontDictionaryAccessHelper.GetFontDescriptor(pdfScanner, fontDescriptorFactory, dictionary, isLenientParsing);
 
             // TODO: use the parsed font fully.
@@ -64,7 +68,7 @@
 
             Encoding encoding = encodingReader.Read(dictionary, isLenientParsing, descriptor);
 
-            return new TrueTypeSimpleFont(name, descriptor, toUnicodeCMap, encoding, font);
+            return new TrueTypeSimpleFont(name, descriptor, toUnicodeCMap, encoding, font, firstCharacter, widths);
         }
 
         private TrueTypeFont ParseTrueTypeFont(FontDescriptor descriptor)

src/UglyToad.PdfPig/Fonts/Simple/TrueTypeSimpleFont.cs

@@ -1,4 +1,6 @@
-namespace UglyToad.PdfPig.Fonts.Simple
+using System;
+
+namespace UglyToad.PdfPig.Fonts.Simple
 {
     using Cmap;
     using Composite;
@@ -20,6 +22,10 @@
         [CanBeNull]
         private readonly TrueTypeFont font;
 
+        private readonly int firstCharacter;
+
+        private readonly decimal[] widths;
+
         public NameToken Name { get; }
 
         public bool IsVertical { get; }
@@ -31,11 +37,15 @@
             FontDescriptor descriptor,
             [CanBeNull] CMap toUnicodeCMap,
             [CanBeNull] Encoding encoding,
-            [CanBeNull] TrueTypeFont font)
+            [CanBeNull] TrueTypeFont font,
+            int firstCharacter,
+            decimal[] widths)
         {
             this.descriptor = descriptor;
             this.encoding = encoding;
             this.font = font;
+            this.firstCharacter = firstCharacter;
+            this.widths = widths;
 
             Name = name;
             IsVertical = false;
@@ -95,7 +105,24 @@
                 return bounds;
             }
 
-            return descriptor.BoundingBox;
+            if (font.TryGetBoundingAdvancedWidth(characterCode, out var width))
+            {
+                return new PdfRectangle(0, 0, width, 0);
+            }
+
+            return new PdfRectangle(0, 0, GetWidth(characterCode), 0);
+        }
+
+        private decimal GetWidth(int characterCode)
+        {
+            var index = characterCode - firstCharacter;
+
+            if (index < 0 || index >= widths.Length)
+            {
+                return descriptor.MissingWidth;
+            }
+
+            return widths[index];
         }
 
         public TransformationMatrix GetFontMatrix()

src/UglyToad.PdfPig/Fonts/TrueType/TrueTypeFont.cs

@@ -58,5 +58,24 @@
 
             return true;
         }
+
+        public bool TryGetBoundingAdvancedWidth(int characterCode, out decimal width)
+        {
+            width = 0m;
+
+            if (CMapTable == null)
+            {
+                return false;
+            }
+
+            if (!CMapTable.TryGetGlyphIndex(characterCode, out var index))
+            {
+                return false;
+            }
+
+            width = TableRegister.HorizontalMetricsTable.GetAdvanceWidth(index);
+
+            return true;
+        }
     }
 }