Basic support for Type3 Fonts in Pdf + various refactorings

experimental/PdfViewer/SkPdfImageDictionary_autogen.h

-#ifndef __DEFINED__SkPdfImageDictionary
-#define __DEFINED__SkPdfImageDictionary
-
-#include "SkPdfEnums_autogen.h"
-#include "SkPdfArray_autogen.h"
-#include "SkPdfXObjectDictionary_autogen.h"
-
-// Additional entries specific to an image dictionary
-class SkPdfImageDictionary : public SkPdfXObjectDictionary {
-public:
-  virtual SkPdfObjectType getType() const { return kImageDictionary_SkPdfObjectType;}
-  virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kImageDictionary_SkPdfObjectType + 1);}
-public:
-  virtual SkPdfImageDictionary* asImageDictionary() {return this;}
-  virtual const SkPdfImageDictionary* asImageDictionary() const {return this;}
-
-private:
-  virtual SkPdfType1FormDictionary* asType1FormDictionary() {return NULL;}
-  virtual const SkPdfType1FormDictionary* asType1FormDictionary() const {return NULL;}
-
-public:
-private:
-public:
-  SkPdfImageDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfXObjectDictionary(podofoDoc, podofoObj) {}
-
-  virtual bool valid() const {return true;}
-
-  SkPdfImageDictionary& operator=(const SkPdfImageDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
-
-/** (Optional) The type of PDF object that this dictionary describes; if
- *  present, must be XObject for an image XObject.
-**/
-  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 XObject that this dictionary describes; must be
- *  Image for an image XObject.
-**/
-  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) The width of the image, in samples.
-**/
-  bool has_Width() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Width", "", NULL));
-  }
-
-  long Width() const {
-    long ret;
-    if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Width", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return 0;
-  }
-
-/** (Required) The height of the image, in samples.
-**/
-  bool has_Height() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Height", "", NULL));
-  }
-
-  long Height() const {
-    long ret;
-    if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Height", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return 0;
-  }
-
-/** (Required except for image masks; not allowed for image masks) The color
- *  space in which image samples are specified. This may be any type of color
- *  space except Pattern.
-**/
-  bool has_ColorSpace() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ColorSpace", "", NULL));
-  }
-
-  bool isColorSpaceAName() const {
-    SkPdfObject* ret = NULL;
-    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ColorSpace", "", &ret)) return false;
-    return ret->podofo()->GetDataType() == ePdfDataType_Name;
-  }
-
-  std::string getColorSpaceAsName() const {
-    std::string ret = "";
-    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ColorSpace", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
-  bool isColorSpaceAArray() const {
-    SkPdfObject* ret = NULL;
-    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ColorSpace", "", &ret)) return false;
-    return ret->podofo()->GetDataType() == ePdfDataType_Array;
-  }
-
-  SkPdfArray getColorSpaceAsArray() const {
-    SkPdfArray ret = SkPdfArray();
-    if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ColorSpace", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return SkPdfArray();
-  }
-
-/** (Required except for image masks; optional for image masks) The number of
- *  bits used to represent each color component. Only a single value may be
- *  specified; the number of bits is the same for all color components. Valid
- *  values are 1, 2, 4, and 8. If ImageMask is true, this entry is optional, and if
- *  specified, its value must be 1.
- *  If the image stream uses a filter, the value of BitsPerComponent must be
- *  consistent with the size of the data samples that the filter delivers. In par-
- *  ticular, a CCITTFaxDecode or JBIG2Decode filter always delivers 1-bit sam-
- *  ples, a RunLengthDecode or DCTDecode filter delivers 8-bit samples, and
- *  an LZWDecode or FlateDecode filter delivers samples of a specified size if
- *  a predictor function is used.
-**/
-  bool has_BitsPerComponent() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "BitsPerComponent", "", NULL));
-  }
-
-  long BitsPerComponent() const {
-    long ret;
-    if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "BitsPerComponent", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return 0;
-  }
-
-/** (Optional; PDF 1.1) The name of a color rendering intent to be used in
- *  rendering the image (see "Rendering Intents" on page 197). Default value:
- *  the current rendering intent in the graphics state.
-**/
-  bool has_Intent() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Intent", "", NULL));
-  }
-
-  std::string Intent() const {
-    std::string ret;
-    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Intent", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
-/** (Optional) A flag indicating whether the image is to be treated as an image
- *  mask (see Section 4.8.5, "Masked Images"). If this flag is true, the value of
- *  BitsPerComponent must be 1 and Mask and ColorSpace should not be
- *  specified; unmasked areas will be painted using the current nonstroking
- *  color. Default value: false.
-**/
-  bool has_ImageMask() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ImageMask", "", NULL));
-  }
-
-  bool ImageMask() const {
-    bool ret;
-    if (BoolFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ImageMask", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return false;
-  }
-
-/** (Optional except for image masks; not allowed for image masks; PDF 1.3) An
- *  image XObject defining an image mask to be applied to this image (see
- *  "Explicit Masking" on page 277), or an array specifying a range of colors
- *  to be applied to it as a color key mask (see "Color Key Masking" on page
- *  277). If ImageMask is true, this entry must not be present. (See
- *  implementation note 35 in Appendix H.)
-**/
-  bool has_Mask() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Mask", "", NULL));
-  }
-
-  bool isMaskAStream() const {
-    SkPdfObject* ret = NULL;
-    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Mask", "", &ret)) return false;
-    return ret->podofo()->HasStream();
-  }
-
-  SkPdfStream* getMaskAsStream() const {
-    SkPdfStream* ret = NULL;
-    if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Mask", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return NULL;
-  }
-
-  bool isMaskAArray() const {
-    SkPdfObject* ret = NULL;
-    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Mask", "", &ret)) return false;
-    return ret->podofo()->GetDataType() == ePdfDataType_Array;
-  }
-
-  SkPdfArray getMaskAsArray() const {
-    SkPdfArray ret = SkPdfArray();
-    if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Mask", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return SkPdfArray();
-  }
-
-/** (Optional; PDF 1.4) A subsidiary image XObject defining a soft-mask
- *  image (see "Soft-Mask Images" on page 447) to be used as a source of
- *  mask shape or mask opacity values in the transparent imaging model. The
- *  alpha source parameter in the graphics state determines whether the mask
- *  values are interpreted as shape or opacity.
- *  If present, this entry overrides the current soft mask in the graphics state,
- *  as well as the image's Mask entry, if any. (However, the other transparency-
- *  related graphics state parameters-blend mode and alpha constant-
- *  remain in effect.) If SMask is absent, the image has no associated soft mask
- *  (although the current soft mask in the graphics state may still apply).
-**/
-  bool has_SMask() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "SMask", "", NULL));
-  }
-
-  SkPdfStream* SMask() const {
-    SkPdfStream* ret;
-    if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "SMask", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return NULL;
-  }
-
-/** (Optional) An array of numbers describing how to map image samples
- *  into the range of values appropriate for the image's color space (see
- *  "Decode Arrays" on page 271). If ImageMask is true, the array must be
- *  either [0 1] or [1 0]; otherwise, its length must be twice the number of
- *  color components required by ColorSpace. Default value: see "Decode
- *  Arrays" on page 271.
-**/
-  bool has_Decode() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Decode", "", NULL));
-  }
-
-  SkPdfArray Decode() const {
-    SkPdfArray ret;
-    if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Decode", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return SkPdfArray();
-  }
-
-/** (Optional) A flag indicating whether image interpolation is to be per-
- *  formed (see "Image Interpolation" on page 273). Default value: false.
-**/
-  bool has_Interpolate() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Interpolate", "", NULL));
-  }
-
-  bool Interpolate() const {
-    bool ret;
-    if (BoolFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Interpolate", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return false;
-  }
-
-/** (Optional; PDF 1.3) An array of alternate image dictionaries for this image
- *  (see "Alternate Images" on page 273). The order of elements within the
- *  array has no significance. This entry may not be present in an image
- *  XObject that is itself an alternate image.
-**/
-  bool has_Alternates() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Alternates", "", NULL));
-  }
-
-  SkPdfArray Alternates() const {
-    SkPdfArray ret;
-    if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Alternates", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return SkPdfArray();
-  }
-
-/** (Required in PDF 1.0; optional otherwise) The name by which this image
- *  XObject is referenced in the XObject subdictionary of the current resource
- *  dictionary (see Section 3.7.2, "Resource Dictionaries").
- *  Note: This entry is obsolescent and its use is no longer recommended. (See
- *  implementation note 36 in Appendix H.)
-**/
-  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 if the image is a structural content item; PDF 1.3) The integer key
- *  of the image's entry in the structural parent tree (see "Finding Structure
- *  Elements from Content Items" on page 600).
-**/
-  bool has_StructParent() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "StructParent", "", NULL));
-  }
-
-  long StructParent() const {
-    long ret;
-    if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "StructParent", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return 0;
-  }
-
-/** (Optional; PDF 1.3; indirect reference preferred) The digital identifier of the
- *  image's parent Web Capture content set (see Section 9.9.5, "Object At-
- *  tributes Related to Web Capture").
-**/
-  bool has_ID() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ID", "", NULL));
-  }
-
-  std::string ID() const {
-    std::string ret;
-    if (StringFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ID", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
-/** (Optional; PDF 1.2) An OPI version dictionary for the image (see Section
- *  9.10.6, "Open Prepress Interface (OPI)"). If ImageMask is true, this entry
- *  is ignored.
-**/
-  bool has_OPI() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "OPI", "", NULL));
-  }
-
-  SkPdfDictionary* OPI() const {
-    SkPdfDictionary* ret;
-    if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "OPI", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return NULL;
-  }
-
-/** (Optional; PDF 1.4) A metadata stream containing metadata for the image
- *  (see Section 9.2.2, "Metadata Streams").
-**/
-  bool has_Metadata() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Metadata", "", NULL));
-  }
-
-  SkPdfStream* Metadata() const {
-    SkPdfStream* ret;
-    if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Metadata", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return NULL;
-  }
-
-};
-
-#endif  // __DEFINED__SkPdfImageDictionary