Basic support for Type3 Fonts in Pdf + various refactorings

experimental/PdfViewer/autogen/SkPdfType3FontDictionary_autogen.h

+#ifndef __DEFINED__SkPdfType3FontDictionary
+#define __DEFINED__SkPdfType3FontDictionary
+
+#include "SkPdfUtils.h"
+#include "SkPdfEnums_autogen.h"
+#include "SkPdfArray_autogen.h"
+#include "SkPdfType1FontDictionary_autogen.h"
+
+// Entries in a Type 3 font dictionary
+class SkPdfType3FontDictionary : public SkPdfType1FontDictionary {
+public:
+  virtual SkPdfObjectType getType() const { return kType3FontDictionary_SkPdfObjectType;}
+  virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kType3FontDictionary_SkPdfObjectType + 1);}
+public:
+  virtual SkPdfType3FontDictionary* asType3FontDictionary() {return this;}
+  virtual const SkPdfType3FontDictionary* asType3FontDictionary() const {return this;}
+
+private:
+  virtual SkPdfMultiMasterFontDictionary* asMultiMasterFontDictionary() {return NULL;}
+  virtual const SkPdfMultiMasterFontDictionary* asMultiMasterFontDictionary() const {return NULL;}
+
+  virtual SkPdfTrueTypeFontDictionary* asTrueTypeFontDictionary() {return NULL;}
+  virtual const SkPdfTrueTypeFontDictionary* asTrueTypeFontDictionary() const {return NULL;}
+
+public:
+private:
+public:
+  SkPdfType3FontDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfType1FontDictionary(podofoDoc, podofoObj) {}
+
+  SkPdfType3FontDictionary(const SkPdfType3FontDictionary& from) : SkPdfType1FontDictionary(from.fPodofoDoc, from.fPodofoObj) {}
+
+  virtual bool valid() const {return true;}
+
+  SkPdfType3FontDictionary& operator=(const SkPdfType3FontDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
+
+/** (Required) The type of PDF object that this dictionary describes; must be
+ *  Font for a font dictionary.
+**/
+  bool has_Type() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Type", "", NULL));
+  }
+
+  std::string Type() const {
+    std::string ret;
+    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Type", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return "";
+  }
+
+/** (Required) The type of font; must be Type3 for a Type 3 font.
+**/
+  bool has_Subtype() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Subtype", "", NULL));
+  }
+
+  std::string Subtype() const {
+    std::string ret;
+    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Subtype", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return "";
+  }
+
+/** (Required in PDF 1.0; optional otherwise) See Table 5.8 on page 317.
+**/
+  bool has_Name() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Name", "", NULL));
+  }
+
+  std::string Name() const {
+    std::string ret;
+    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Name", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return "";
+  }
+
+/** (Required) A rectangle (see Section 3.8.3, "Rectangles"), expressed in the
+ *  glyph coordinate system, specifying the font bounding box. This is the small-
+ *  est rectangle enclosing the shape that would result if all of the glyphs of the
+ *  font were placed with their origins coincident and then filled.
+ *  If all four elements of the rectangle are zero, no assumptions are made based
+ *  on the font bounding box. If any element is nonzero, it is essential that the
+ *  font bounding box be accurate; if any glyph's marks fall outside this bound-
+ *  ing box, incorrect behavior may result.
+**/
+  bool has_FontBBox() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FontBBox", "", NULL));
+  }
+
+  SkRect* FontBBox() const {
+    SkRect* ret;
+    if (SkRectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FontBBox", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Required) An array of six numbers specifying the font matrix, mapping
+ *  glyph space to text space (see Section 5.1.3, "Glyph Positioning and
+ *  Metrics"). A common practice is to define glyphs in terms of a 1000-unit
+ *  glyph     coordinate      system,     in    which    case the font    matrix    is
+ *  [0.001 0 0 0.001 0 0].
+**/
+  bool has_FontMatrix() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FontMatrix", "", NULL));
+  }
+
+  SkMatrix* FontMatrix() const {
+    SkMatrix* ret;
+    if (SkMatrixFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FontMatrix", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Required) A dictionary in which each key is a character name and the value
+ *  associated with that key is a content stream that constructs and paints the
+ *  glyph for that character. The stream must include as its first operator either
+ *  d0 or d1. This is followed by operators describing one or more graphics
+ *  objects, which may include path, text, or image objects. See below for more
+ *  details about Type 3 glyph descriptions.
+**/
+  bool has_CharProcs() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "CharProcs", "", NULL));
+  }
+
+  SkPdfDictionary* CharProcs() const {
+    SkPdfDictionary* ret;
+    if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "CharProcs", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Required) An encoding dictionary whose Differences array specifies the
+ *  complete character encoding for this font (see Section 5.5.5, "Character
+ *  Encoding"; also see implementation note 46 in Appendix H).
+**/
+  bool has_Encoding() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", NULL));
+  }
+
+  bool isEncodingAName() const {
+    SkPdfObject* ret = NULL;
+    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return false;
+    return ret->podofo()->GetDataType() == ePdfDataType_Name;
+  }
+
+  std::string getEncodingAsName() const {
+    std::string ret = "";
+    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return "";
+  }
+
+  bool isEncodingAEncodingdictionary() const {
+    SkPdfObject* ret = NULL;
+    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return false;
+    return ret->podofo()->GetDataType() == ePdfDataType_Dictionary;
+  }
+
+  SkPdfEncodingDictionary* getEncodingAsEncodingdictionary() const {
+    SkPdfEncodingDictionary* ret = NULL;
+    if (DictionaryFromDictionary2(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Required) The first character code defined in the font's Widths array.
+**/
+  bool has_FirstChar() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FirstChar", "", NULL));
+  }
+
+  long FirstChar() const {
+    long ret;
+    if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FirstChar", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return 0;
+  }
+
+/** (Required) The last character code defined in the font's Widths array.
+**/
+  bool has_LastChar() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "LastChar", "", NULL));
+  }
+
+  long LastChar() const {
+    long ret;
+    if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "LastChar", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return 0;
+  }
+
+/** (Required; indirect reference preferred) An array of (LastChar - FirstChar + 1)
+ *  widths, each element being the glyph width for the character whose code is
+ *  FirstChar plus the array index. For character codes outside the range FirstChar
+ *  to LastChar, the width is 0. These widths are interpreted in glyph space as
+ *  specified by FontMatrix (unlike the widths of a Type 1 font, which are in
+ *  thousandths of a unit of text space).
+ *  Note: If FontMatrix specifies a rotation, only the horizontal component of the
+ *  transformed width is used. That is, the resulting displacement is always horizon-
+ *  tal in text space, as is the case for all simple fonts.
+**/
+  bool has_Widths() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Widths", "", NULL));
+  }
+
+  SkPdfArray* Widths() const {
+    SkPdfArray* ret;
+    if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Widths", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Optional but strongly recommended; PDF 1.2) A list of the named resources,
+ *  such as fonts and images, required by the glyph descriptions in this font (see
+ *  Section 3.7.2, "Resource Dictionaries"). If any glyph descriptions refer to
+ *  named resources but this dictionary is absent, the names are looked up in the
+ *  resource dictionary of the page on which the font is used. (See implementa-
+ *  tion note 47 in Appendix H.)
+**/
+  bool has_Resources() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Resources", "", NULL));
+  }
+
+  SkPdfDictionary* Resources() const {
+    SkPdfDictionary* ret;
+    if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Resources", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Optional; PDF 1.2) A stream containing a CMap file that maps character
+ *  codes to Unicode values (see Section 5.9, "ToUnicode CMaps").
+**/
+  bool has_ToUnicode() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ToUnicode", "", NULL));
+  }
+
+  SkPdfStream* ToUnicode() const {
+    SkPdfStream* ret;
+    if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ToUnicode", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+};
+
+#endif  // __DEFINED__SkPdfType3FontDictionary