Optionally run RAW images serially

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index a0dcb1cfc5b08ce16c3455f5097b44ba288b233a..10ec545bbe7c491952686f509bca44f1fe77dc92 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -38,6 +38,9 @@
 
 DEFINE_bool(multiPage, false, "For document-type backends, render the source"
             " into multiple pages");
+#ifdef SK_CODEC_DECODES_RAW
+DEFINE_bool(RAW_threading, true, "Allow RAW decodes to run on multiple threads?");
+#endif
 
 static bool lazy_decode_bitmap(const void* src, size_t size, SkBitmap* dst) {
     SkAutoTUnref<SkData> encoded(SkData::NewWithCopy(src, size));
@@ -46,6 +49,14 @@ static bool lazy_decode_bitmap(const void* src, size_t size, SkBitmap* dst) {
 
 namespace DM {
 
+const char* SkStringExtension(const SkString& string) {
+    int index = string.findLastOf('.');
+    if (index >= 0 && (size_t) ++index < string.size()) {
+        return &string.c_str()[index];
+    }
+    return "";
+}
+
 GMSrc::GMSrc(skiagm::GMRegistry::Factory factory) : fFactory(factory) {}
 
 Error GMSrc::draw(SkCanvas* canvas) const {
@@ -238,6 +249,24 @@ Name BRDSrc::name() const {
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
+static int enclave_from_path_name(const SkString& path) {
+#ifdef SK_CODEC_DECODES_RAW
+    if (!FLAGS_RAW_threading) {
+        static const char* const exts[] = {
+            "arw", "cr2", "dng", "nef", "nrw", "orf", "raf", "rw2", "pef", "srw",
+            "ARW", "CR2", "DNG", "NEF", "NRW", "ORF", "RAF", "RW2", "PEF", "SRW",
+        };
+        const char* actualExt = SkStringExtension(path);
+        for (auto* ext : exts) {
+            if (0 == strcmp(ext, actualExt)) {
+                return kRAW_Enclave;
+            }
+        }
+    }
+#endif
+    return kAnyThread_Enclave;
+}
+
 CodecSrc::CodecSrc(Path path, Mode mode, DstColorType dstColorType, SkAlphaType dstAlphaType,
                    float scale)
     : fPath(path)
@@ -245,6 +274,7 @@ CodecSrc::CodecSrc(Path path, Mode mode, DstColorType dstColorType, SkAlphaType
     , fDstColorType(dstColorType)
     , fDstAlphaType(dstAlphaType)
     , fScale(scale)
+    , fEnclave(enclave_from_path_name(path))
 {}
 
 bool CodecSrc::veto(SinkFlags flags) const {
@@ -612,6 +642,7 @@ AndroidCodecSrc::AndroidCodecSrc(Path path, Mode mode, CodecSrc::DstColorType ds
     , fDstColorType(dstColorType)
     , fDstAlphaType(dstAlphaType)
     , fSampleSize(sampleSize)
+    , fEnclave(enclave_from_path_name(path))
 {}
 
 bool AndroidCodecSrc::veto(SinkFlags flags) const {