Add unit test for GlyphPageTreeNode.

Source/platform/fonts/skia/SimpleFontDataSkia.cpp

 /*
  * Copyright (c) 2008, 2009, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #include "config.h"
 #include "platform/fonts/SimpleFontData.h"
 
 #include <unicode/normlzr.h>
 #include "SkPaint.h"
 #include "SkPath.h"
 #include "SkTypeface.h"
 #include "SkTypes.h"
+#include "SkUtils.h"
 #include "platform/fonts/FontDescription.h"
+#include "platform/fonts/GlyphPage.h"
 #include "platform/fonts/VDMXParser.h"
 #include "platform/geometry/FloatRect.h"
 #include "wtf/unicode/Unicode.h"
 
 namespace WebCore {
 
 // This is the largest VDMX table which we'll try to load and parse.
 static const size_t maxVDMXTableSize = 1024 * 1024; // 1 MB
 
 void SimpleFontData::platformInit()
@@ skipping 221 matching lines @@
     m_platformData.setupPaint(&paint);
     paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
     if (paint.textToGlyphs(&normalizedCharacters[0], normalizedLength * 2, 0)) {
         addResult.storedValue->value = true;
         return true;
     }
     return false;
 }
 #endif
 
+bool SimpleFontData::fillGlyphPage(GlyphPage* pageToFill, unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength) const
+{
+    if (SkUTF16_IsHighSurrogate(buffer[bufferLength-1])) {
+        SkDebugf("%s last char is high-surrogate", __FUNCTION__);
+        return false;
+    }
+
+    SkAutoSTMalloc<GlyphPage::size, uint16_t> glyphStorage(length);
+
+    uint16_t* glyphs = glyphStorage.get();
+    SkTypeface* typeface = platformData().typeface();
+    typeface->charsToGlyphs(buffer, SkTypeface::kUTF16_Encoding, glyphs, length);
+
+    unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero
+    for (unsigned i = 0; i < length; i++) {
+        pageToFill->setGlyphDataForIndex(offset + i, glyphs[i], glyphs[i] ? this : 0);
+        allGlyphs |= glyphs[i];
+    }
+
+    return allGlyphs;
+}
+
 } // namespace WebCore