am faf26d17: Minikin: Remove unused variables, fix init order

* commit 'faf26d176f220c5fa00c20085b764346c998405e':
  Minikin: Remove unused variables, fix init order

engine/src/flutter/include/minikin/FontFamily.h

@@ -141,7 +141,8 @@ public:
     MinikinFont* getFont(size_t index) const;
     FontStyle getStyle(size_t index) const;
 
-    // Get Unicode coverage. Lifetime of returned bitset is same as receiver.
+    // Get Unicode coverage. Lifetime of returned bitset is same as receiver. May return nullptr on
+    // error.
     const SparseBitSet* getCoverage();
 private:
     void addFontLocked(MinikinFont* typeface, FontStyle style);

engine/src/flutter/libs/minikin/FontCollection.cpp

@@ -53,8 +53,12 @@ FontCollection::FontCollection(const vector<FontFamily*>& typefaces) :
             continue;
         }
         family->RefLocked();
-        mFamilies.push_back(family);  // emplace_back would be better
         const SparseBitSet* coverage = family->getCoverage();
+        if (coverage == nullptr) {
+            family->UnrefLocked();
+            continue;
+        }
+        mFamilies.push_back(family);  // emplace_back would be better
         mMaxChar = max(mMaxChar, coverage->length());
         lastChar.push_back(coverage->nextSetBit(0));
     }

engine/src/flutter/libs/minikin/FontFamily.cpp

@@ -191,10 +191,18 @@ const SparseBitSet* FontFamily::getCoverage() {
         MinikinFont* typeface = getClosestMatch(defaultStyle).font;
         const uint32_t cmapTag = MinikinFont::MakeTag('c', 'm', 'a', 'p');
         size_t cmapSize = 0;
-        bool ok = typeface->GetTable(cmapTag, NULL, &cmapSize);
+        if (!typeface->GetTable(cmapTag, NULL, &cmapSize)) {
+            ALOGE("Could not get cmap table size!\n");
+            // Note: This means we will retry on the next call to getCoverage, as we can't store
+            //       the failure. This is fine, as we assume this doesn't really happen in practice.
+            return nullptr;
+        }
         UniquePtr<uint8_t[]> cmapData(new uint8_t[cmapSize]);
-        ok = typeface->GetTable(cmapTag, cmapData.get(), &cmapSize);
+        if (!typeface->GetTable(cmapTag, cmapData.get(), &cmapSize)) {
-        CmapCoverage::getCoverage(mCoverage, cmapData.get(), cmapSize);
+            ALOGE("Unexpected failure to read cmap table!\n");
+            return nullptr;
+        }
+        CmapCoverage::getCoverage(mCoverage, cmapData.get(), cmapSize);  // TODO: Error check?
 #ifdef VERBOSE_DEBUG
         ALOGD("font coverage length=%d, first ch=%x\n", mCoverage->length(),
                 mCoverage->nextSetBit(0));

engine/src/flutter/libs/minikin/Layout.cpp

@@ -77,11 +77,11 @@ class LayoutCacheKey {
 public:
     LayoutCacheKey(const FontCollection* collection, const MinikinPaint& paint, FontStyle style,
             const uint16_t* chars, size_t start, size_t count, size_t nchars, bool dir)
-            : mStart(start), mCount(count), mId(collection->getId()), mStyle(style),
+            : mChars(chars), mNchars(nchars),
+            mStart(start), mCount(count), mId(collection->getId()), mStyle(style),
             mSize(paint.size), mScaleX(paint.scaleX), mSkewX(paint.skewX),
             mLetterSpacing(paint.letterSpacing),
-            mPaintFlags(paint.paintFlags), mIsRtl(dir),
+            mPaintFlags(paint.paintFlags), mIsRtl(dir) {
-            mChars(chars), mNchars(nchars) {
     }
     bool operator==(const LayoutCacheKey &other) const;
     hash_t hash() const;

engine/src/flutter/libs/minikin/MinikinFontFreeType.cpp

@@ -49,7 +49,7 @@ float MinikinFontFreeType::GetHorizontalAdvance(uint32_t glyph_id,
     FT_Set_Pixel_Sizes(mTypeface, 0, paint.size);
 	FT_UInt32 flags = FT_LOAD_DEFAULT;  // TODO: respect hinting settings
 	FT_Fixed advance;
-    FT_Error error = FT_Get_Advance(mTypeface, glyph_id, flags, &advance);
+    FT_Get_Advance(mTypeface, glyph_id, flags, &advance);
     return advance * (1.0 / 65536);
 }
 

engine/src/flutter/sample/example_skia.cpp

@@ -55,8 +55,6 @@ FontCollection *makeFontCollection() {
     };
 
     FontFamily *family = new FontFamily();
-    FT_Face face;
-    FT_Error error;
     for (size_t i = 0; i < sizeof(fns)/sizeof(fns[0]); i++) {
         const char *fn = fns[i];
         SkTypeface *skFace = SkTypeface::CreateFromFile(fn);
@@ -118,7 +116,6 @@ int runMinikinTest() {
     Layout layout;
     layout.setFontCollection(collection);
     const char *text = "fine world \xe0\xa4\xa8\xe0\xa4\xae\xe0\xa4\xb8\xe0\xa5\x8d\xe0\xa4\xa4\xe0\xa5\x87";
-    const char *style = "font-size: 32; font-weight: 700;";
     int bidiFlags = 0;
     FontStyle fontStyle(7);
     MinikinPaint minikinPaint;