SkPDF: SkTypeface::openStream could return nullptr
Speculative fix for hard-to-reproduce bug.
BUG=163892
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1842163002
Review URL: https://codereview.chromium.org/1842163002
diff --git a/src/pdf/SkPDFFont.cpp b/src/pdf/SkPDFFont.cpp
index c42092c..8718596 100644
--- a/src/pdf/SkPDFFont.cpp
+++ b/src/pdf/SkPDFFont.cpp
@@ -590,7 +590,10 @@
SkPDFStream** fontStream) {
int ttcIndex;
std::unique_ptr<SkStream> fontData(typeface->openStream(&ttcIndex));
- SkASSERT(fontData.get());
+ SkASSERT(fontData);
+ if (!fontData) {
+ return 0;
+ }
size_t fontSize = fontData->getLength();
@@ -1047,6 +1050,9 @@
typeface(),
*subset,
&rawStream);
+ if (0 == fontSize) {
+ return false;
+ }
if (rawStream) {
fontStream.reset(rawStream);
fontStream->insertInt("Length1", fontSize);
@@ -1059,6 +1065,9 @@
std::unique_ptr<SkStreamAsset> fontData(
this->typeface()->openStream(nullptr));
SkASSERT(fontData);
+ if (!fontData || 0 == fontData->getLength()) {
+ return false;
+ }
fontSize = fontData->getLength();
SkASSERT(fontSize > 0);
fontStream.reset(new SkPDFSharedStream(fontData.release()));
@@ -1068,9 +1077,15 @@
}
case SkAdvancedTypefaceMetrics::kCFF_Font:
case SkAdvancedTypefaceMetrics::kType1CID_Font: {
+ std::unique_ptr<SkStreamAsset> fontData(
+ this->typeface()->openStream(nullptr));
+ SkASSERT(fontData);
+ SkASSERT(fontData->getLength() > 0);
+ if (!fontData || 0 == fontData->getLength()) {
+ return false;
+ }
sk_sp<SkPDFSharedStream> fontStream(
- new SkPDFSharedStream(this->typeface()->openStream(nullptr)));
-
+ new SkPDFSharedStream(fontData.release()));
if (getType() == SkAdvancedTypefaceMetrics::kCFF_Font) {
fontStream->dict()->insertName("Subtype", "Type1C");
} else {
@@ -1198,7 +1213,12 @@
size_t header SK_INIT_TO_AVOID_WARNING;
size_t data SK_INIT_TO_AVOID_WARNING;
size_t trailer SK_INIT_TO_AVOID_WARNING;
- std::unique_ptr<SkStream> rawFontData(typeface()->openStream(&ttcIndex));
+ std::unique_ptr<SkStreamAsset> rawFontData(typeface()->openStream(&ttcIndex));
+ SkASSERT(rawFontData);
+ SkASSERT(rawFontData->getLength() > 0);
+ if (!rawFontData || 0 == rawFontData->getLength()) {
+ return false;
+ }
sk_sp<SkData> fontData(handle_type1_stream(rawFontData.get(), &header,
&data, &trailer));
if (fontData.get() == nullptr) {