Fix the NPR issue when Font.getTypeface() returns nullptr.

DEPS

@@ -12,7 +12,7 @@
       },
       {
         "url": "${PAG_GROUP}/tgfx.git",
-        "commit": "ab0937d87b579ebbe74028e6f8068da351a68d53",
+        "commit": "2d4c22ab50fe738d221025c1b68812e7b8d6f232",
         "dir": "third_party/tgfx"
       },
       {

src/platform/web/NativeTextShaper.cpp

@@ -116,7 +116,7 @@ PositionedGlyphs NativeTextShaper::Shape(const std::string& text,
       continue;
     }
     auto str = text.substr(infos[i].cluster, length);
-    auto glyphID = typeface->getGlyphID(str);
+    auto glyphID = typeface ? typeface->getGlyphID(str) : 0;
     if (glyphID == 0) {
       for (const auto& faceHolder : fallbackTypefaces) {
         auto face = faceHolder->getTypeface();

src/rendering/caches/TextAtlas.cpp

@@ -145,7 +145,8 @@ static AtlasTextRun CreateTextRun(const GlyphHandle& glyph) {
 static void ComputeStyleKey(tgfx::BytesKey* styleKey, const GlyphHandle& glyph) {
   styleKey->write(static_cast<uint32_t>(glyph->getStyle()));
   styleKey->write(glyph->getStrokeWidth());
-  styleKey->write(glyph->getFont().getTypeface()->uniqueID());
+  auto typeface = glyph->getFont().getTypeface();
+  styleKey->write(typeface ? typeface->uniqueID() : 0);
 }
 
 struct Page {

src/rendering/caches/TextBlock.cpp

@@ -59,7 +59,7 @@ TextBlock::TextBlock(ID assetID, std::vector<std::vector<GlyphHandle>> lines, fl
   for (const auto& line : this->lines()) {
     for (const auto& tempGlyph : line) {
       auto glyph = tempGlyph->makeHorizontalGlyph();
-      auto hasColor = glyph->getFont().getTypeface()->hasColor();
+      auto hasColor = glyph->getFont().hasColor();
       auto style = glyph->getStyle();
       if (hasColor && (style == TextStyle::Stroke || style == TextStyle::StrokeAndFill)) {
         glyph->setStrokeWidth(0);

src/rendering/caches/TextContentCache.cpp

@@ -137,8 +137,7 @@ std::pair<std::vector<GlyphHandle>, std::vector<GlyphHandle>> GetGlyphs(
   for (auto& line : glyphLines) {
     for (auto& glyph : line) {
       simpleGlyphs.push_back(glyph);
-      auto typeface = glyph->getFont().getTypeface();
-      if (typeface->hasColor()) {
+      if (glyph->getFont().hasColor()) {
         colorGlyphs.push_back(glyph);
       }
     }

src/rendering/graphics/Glyph.cpp

@@ -112,7 +112,8 @@ void Glyph::computeStyleKey(tgfx::BytesKey* styleKey) const {
                             static_cast<uint8_t>(textStyle)};
   styleKey->write(strokeValues);
   styleKey->write(strokeWidth);
-  styleKey->write(getFont().getTypeface()->uniqueID());
+  auto typeface = getFont().getTypeface();
+  styleKey->write(typeface ? typeface->uniqueID() : 0);
 }
 
 bool Glyph::isVisible() const {
@@ -129,7 +130,7 @@ tgfx::Matrix Glyph::getTotalMatrix() const {
 }
 
 void Glyph::computeAtlasKey(tgfx::BytesKey* bytesKey, TextStyle style) const {
-  bytesKey->write(static_cast<uint32_t>(getFont().getTypeface()->hasColor()));
+  bytesKey->write(static_cast<uint32_t>(getFont().hasColor()));
   bytesKey->write(static_cast<uint32_t>(getGlyphID()));
   bytesKey->write(static_cast<uint32_t>(style));
 }

src/rendering/graphics/Text.cpp

@@ -328,7 +328,7 @@ void Text::draw(Canvas* canvas, const TextAtlas* textAtlas) const {
       }
       parameters.matrices.emplace_back(matrix);
       parameters.rects.emplace_back(locator.location);
-      if (glyph->getFont().getTypeface()->hasColor()) {
+      if (glyph->getFont().hasColor()) {
         auto alpha = canvas->getAlpha();
         canvas->setAlpha(alpha * glyph->getAlpha());
         Draw(canvas, textAtlas, parameters);

src/rendering/utils/shaper/TextShaperHarfbuzz.cpp

@@ -45,7 +45,10 @@ hb_blob_t* HBGetTable(hb_face_t*, hb_tag_t tag, void* userData) {
                         [](void* ctx) { delete reinterpret_cast<PtrWrapper<tgfx::Data>*>(ctx); });
 }
 
-std::shared_ptr<hb_face_t> CreateHBFace(const std::shared_ptr<tgfx::Typeface>& typeface) {
+std::shared_ptr<hb_face_t> CreateHBFace(std::shared_ptr<tgfx::Typeface> typeface) {
+  if (typeface == nullptr) {
+    return nullptr;
+  }
   std::shared_ptr<hb_face_t> hbFace;
   auto data = typeface->getBytes();
   if (data && !data->empty()) {
@@ -142,7 +145,10 @@ static HBLockedFontCache GetHBFontCache() {
   return {HBFontLRU, HBFontCache, HBFontCacheMutex};
 }
 
-static std::shared_ptr<hb_font_t> CreateHBFont(const std::shared_ptr<tgfx::Typeface>& typeface) {
+static std::shared_ptr<hb_font_t> CreateHBFont(std::shared_ptr<tgfx::Typeface> typeface) {
+  if (typeface == nullptr) {
+    return nullptr;
+  }
   auto cache = GetHBFontCache();
   auto hbFont = cache.find(typeface->uniqueID());
   if (hbFont == nullptr) {
@@ -157,7 +163,7 @@ static std::shared_ptr<hb_font_t> CreateHBFont(const std::shared_ptr<tgfx::Typef
 }
 
 static std::vector<std::tuple<uint32_t, uint32_t, uint32_t>> Shape(
-    const std::string& text, const std::shared_ptr<tgfx::Typeface>& typeface) {
+    const std::string& text, std::shared_ptr<tgfx::Typeface> typeface) {
   auto hbFont = CreateHBFont(typeface);
   if (hbFont == nullptr) {
     return {};

src/rendering/utils/shaper/TextShaperPrimitive.cpp

@@ -32,8 +32,7 @@ PositionedGlyphs TextShaperPrimitive::Shape(const std::string& text,
     tgfx::UTF::NextUTF8(&textStart, textStop);
     auto length = textStart - oldPosition;
     auto str = std::string(oldPosition, length);
-    auto glyphID = typeface->getGlyphID(str);
-    bool found = false;
+    auto glyphID = typeface ? typeface->getGlyphID(str) : 0;
     if (glyphID == 0) {
       for (const auto& faceHolder : fallbackTypefaces) {
         auto face = faceHolder->getTypeface();
@@ -43,13 +42,9 @@ PositionedGlyphs TextShaperPrimitive::Shape(const std::string& text,
         glyphID = face->getGlyphID(str);
         if (glyphID != 0) {
           glyphs.emplace_back(std::move(face), glyphID, oldPosition - text.data());
-          found = true;
           break;
         }
       }
-      if (!found) {
-        glyphs.emplace_back(typeface, glyphID, oldPosition - text.data());
-      }
     } else {
       glyphs.emplace_back(typeface, glyphID, oldPosition - text.data());
     }

test/baseline/version.json

@@ -8451,7 +8451,7 @@
         "NormalEmoji": "4b7f3114",
         "PositionAnimator": "7f7435d6f",
         "RangeSelectorTriangleHighLow": "5c3b8bc5",
-        "SmallFontSizeScale": "4b7f3114",
+        "SmallFontSizeScale": "b2fcd22b",
         "SmallFontSizeScale_LowResolution": "088c7e93",
         "TextLayerScaleAnimationWithMipmap": "3bd38676",
         "TextPathBox": "7f7435d6f",