Support "Vertical Writing Mode".

Bug 5094208 - Browser does not handle Japanese text in vertical writing mode.
This changeset syncs up with Chrome's implementation for vertical text rendering. It
1. Adds fontOrientation and textOrientation to FontPlatformData.
2. Re-layout the text in drawGlyphs for vertical writing mode.

Change-Id: Icac88a464b4b25b05c758a4e24c1827e0a7a0c91

1 files changed, 16 insertions, 6 deletions

diff --git a/Source/WebCore/platform/graphics/android/FontPlatformDataAndroid.cpp b/Source/WebCore/platform/graphics/android/FontPlatformDataAndroid.cpp
index 8e77b5b..1185fa7 100644
--- a/Source/WebCore/platform/graphics/android/FontPlatformDataAndroid.cpp
+++ b/Source/WebCore/platform/graphics/android/FontPlatformDataAndroid.cpp
@@ -92,13 +92,17 @@ FontPlatformData::FontPlatformData(const FontPlatformData& src)
     mFakeBold   = src.mFakeBold;
     mFakeItalic = src.mFakeItalic;
     m_harfbuzzFace = src.m_harfbuzzFace;
+    mOrientation = src.mOrientation;
+    mTextOrientation = src.mTextOrientation;
 
     inc_count();
     trace(2);
 }
 
-FontPlatformData::FontPlatformData(SkTypeface* tf, float textSize, bool fakeBold, bool fakeItalic)
-    : mTypeface(tf), mTextSize(textSize), mFakeBold(fakeBold), mFakeItalic(fakeItalic)
+FontPlatformData::FontPlatformData(SkTypeface* tf, float textSize, bool fakeBold, bool fakeItalic,
+    FontOrientation orientation, TextOrientation textOrientation)
+    : mTypeface(tf), mTextSize(textSize), mFakeBold(fakeBold), mFakeItalic(fakeItalic),
+      mOrientation(orientation), mTextOrientation(textOrientation)
 {
     if (hashTableDeletedFontValue() != mTypeface) {
         SkSafeRef(mTypeface);
@@ -110,7 +114,7 @@ FontPlatformData::FontPlatformData(SkTypeface* tf, float textSize, bool fakeBold
 
 FontPlatformData::FontPlatformData(const FontPlatformData& src, float textSize)
     : mTypeface(src.mTypeface), mTextSize(textSize), mFakeBold(src.mFakeBold), mFakeItalic(src.mFakeItalic),
-      m_harfbuzzFace(src.m_harfbuzzFace)
+      m_harfbuzzFace(src.m_harfbuzzFace), mOrientation(src.mOrientation), mTextOrientation(src.mTextOrientation)
 {
     if (hashTableDeletedFontValue() != mTypeface) {
         SkSafeRef(mTypeface);
@@ -129,7 +133,8 @@ FontPlatformData::FontPlatformData(float size, bool bold, bool oblique)
 
 FontPlatformData::FontPlatformData(const FontPlatformData& src, SkTypeface* tf)
     : mTypeface(tf), mTextSize(src.mTextSize), mFakeBold(src.mFakeBold),
-      mFakeItalic(src.mFakeItalic)
+      mFakeItalic(src.mFakeItalic), mOrientation(src.mOrientation),
+      mTextOrientation(src.mTextOrientation)
 {
     if (hashTableDeletedFontValue() != mTypeface) {
         SkSafeRef(mTypeface);
@@ -165,6 +170,8 @@ FontPlatformData& FontPlatformData::operator=(const FontPlatformData& src)
     mFakeBold   = src.mFakeBold;
     mFakeItalic = src.mFakeItalic;
     m_harfbuzzFace = src.m_harfbuzzFace;
+    mOrientation = src.mOrientation;
+    mTextOrientation = src.mTextOrientation;
 
     return *this;
 }
@@ -204,7 +211,9 @@ bool FontPlatformData::operator==(const FontPlatformData& a) const
     return  mTypeface == a.mTypeface &&
             mTextSize == a.mTextSize &&
             mFakeBold == a.mFakeBold &&
-            mFakeItalic == a.mFakeItalic;
+            mFakeItalic == a.mFakeItalic &&
+            mOrientation == a.mOrientation &&
+            mTextOrientation == a.mTextOrientation;
 }
 
 unsigned FontPlatformData::hash() const
@@ -219,7 +228,8 @@ unsigned FontPlatformData::hash() const
 
     uint32_t sizeAsInt = *reinterpret_cast<const uint32_t*>(&mTextSize);
 
-    h ^= 0x01010101 * (((int)mFakeBold << 1) | (int)mFakeItalic);
+    h ^= 0x01010101 * ((static_cast<int>(mTextOrientation) << 3) | (static_cast<int>(mOrientation) << 2) |
+         ((int)mFakeBold << 1) | (int)mFakeItalic);
     h ^= sizeAsInt;
     return h;
 }