[PDF] Add plumbing and accessors so that Chrome can record the font types used in a PDF.

- Add a font type accessor to SkPDFFont.
- Plumb font resource retrivial up to SkPDFPage.

Review URL: http://codereview.appspot.com/4547069

git-svn-id: http://skia.googlecode.com/svn/trunk@1444 2bbb7eff-a529-9590-31e7-b0007b416f81

include/pdf/SkPDFDevice.h

@@ -127,6 +127,10 @@ public:
      */
     void getResources(SkTDArray<SkPDFObject*>* resourceList) const;
 
+    /** Get the fonts used on this device.
+     */
+    const SkTDArray<SkPDFFont*>& getFontResources() const;
+
     /** Returns the media box for this device.
      */
     SkRefPtr<SkPDFArray> getMediaBox() const;

include/pdf/SkPDFFont.h

@@ -42,6 +42,11 @@ public:
      */
     SkTypeface* typeface();
 
+    /** Returns the font type represented in this font.  For Type0 fonts,
+     *  returns the type of the decendant font.
+     */
+    SkAdvancedTypefaceMetrics::FontType getType();
+
     /** Return true if this font has an encoding for the passed glyph id.
      */
     bool hasGlyph(uint16_t glyphID);
@@ -72,6 +77,7 @@ public:
 
 private:
     SkRefPtr<SkTypeface> fTypeface;
+    SkAdvancedTypefaceMetrics::FontType fType;
 #ifdef SK_DEBUG
     bool fDescendant;
 #endif

include/pdf/SkPDFPage.h

@@ -86,6 +86,10 @@ public:
                                  SkTDArray<SkPDFDict*>* pageTree,
                                  SkPDFDict** rootNode);
 
+    /** Get the fonts used on this page.
+     */
+    const SkTDArray<SkPDFFont*>& getFontResources() const;
+
 private:
     // Multiple pages may reference the content.
     SkRefPtr<SkPDFDevice> fDevice;

src/pdf/SkPDFDevice.cpp

@@ -1051,6 +1051,10 @@ void SkPDFDevice::getResources(SkTDArray<SkPDFObject*>* resourceList) const {
     }
 }
 
+const SkTDArray<SkPDFFont*>& SkPDFDevice::getFontResources() const {
+    return fFontResources;
+}
+
 SkRefPtr<SkPDFArray> SkPDFDevice::getMediaBox() const {
     SkRefPtr<SkPDFInt> zero = new SkPDFInt(0);
     zero->unref();  // SkRefPtr and new both took a reference.

src/pdf/SkPDFFont.cpp

@@ -444,6 +444,10 @@ SkTypeface* SkPDFFont::typeface() {
     return fTypeface.get();
 }
 
+SkAdvancedTypefaceMetrics::FontType SkPDFFont::getType() {
+    return fType;
+}
+
 bool SkPDFFont::hasGlyph(uint16_t id) {
     return (id >= fFirstGlyphID && id <= fLastGlyphID) || id == 0;
 }
@@ -541,6 +545,8 @@ SkPDFFont::SkPDFFont(class SkAdvancedTypefaceMetrics* fontInfo,
                      SkPDFDict* fontDescriptor)
         : SkPDFDict("Font"),
           fTypeface(typeface),
+          fType(fontInfo ? fontInfo->fType :
+                           SkAdvancedTypefaceMetrics::kNotEmbeddable_Font),
 #ifdef SK_DEBUG
           fDescendant(descendantFont),
 #endif
@@ -549,20 +555,12 @@ SkPDFFont::SkPDFFont(class SkAdvancedTypefaceMetrics* fontInfo,
           fLastGlyphID(fontInfo ? fontInfo->fLastGlyphID : 0),
           fFontInfo(fontInfo),
           fDescriptor(fontDescriptor) {
-
-    SkAdvancedTypefaceMetrics::FontType type;
-    if (fontInfo) {
-        type = fontInfo->fType;
-    } else {
-        type = SkAdvancedTypefaceMetrics::kNotEmbeddable_Font;
-    }
-
     if (fontInfo && fontInfo->fMultiMaster) {
-        SkASSERT(false);  // Not supported yet.
-        fontInfo->fType = SkAdvancedTypefaceMetrics::kOther_Font;
+        NOT_IMPLEMENTED(true, true);
+        fType = SkAdvancedTypefaceMetrics::kOther_Font;
     }
-    if (type == SkAdvancedTypefaceMetrics::kType1CID_Font ||
-        type == SkAdvancedTypefaceMetrics::kTrueType_Font) {
+    if (fType == SkAdvancedTypefaceMetrics::kType1CID_Font ||
+        fType == SkAdvancedTypefaceMetrics::kTrueType_Font) {
         if (descendantFont) {
             populateCIDFont();
         } else {
@@ -574,15 +572,15 @@ SkPDFFont::SkPDFFont(class SkAdvancedTypefaceMetrics* fontInfo,
         return;
     }
 
-    if (type == SkAdvancedTypefaceMetrics::kType1_Font &&
+    if (fType == SkAdvancedTypefaceMetrics::kType1_Font &&
         populateType1Font(glyphID)) {
         return;
     }
 
-    SkASSERT(type == SkAdvancedTypefaceMetrics::kType1_Font ||
-             type == SkAdvancedTypefaceMetrics::kCFF_Font ||
-             type == SkAdvancedTypefaceMetrics::kOther_Font ||
-             type == SkAdvancedTypefaceMetrics::kNotEmbeddable_Font);
+    SkASSERT(fType == SkAdvancedTypefaceMetrics::kType1_Font ||
+             fType == SkAdvancedTypefaceMetrics::kCFF_Font ||
+             fType == SkAdvancedTypefaceMetrics::kOther_Font ||
+             fType == SkAdvancedTypefaceMetrics::kNotEmbeddable_Font);
     populateType3Font(glyphID);
 }
 

src/pdf/SkPDFPage.cpp

@@ -136,3 +136,7 @@ void SkPDFPage::generatePageTree(const SkTDArray<SkPDFPage*>& pages,
     if (rootNode)
         *rootNode = curNodes[0];
 }
+
+const SkTDArray<SkPDFFont*>& SkPDFPage::getFontResources() const {
+    return fDevice->getFontResources();
+}