Add --uninterestingHashesFile to DM

dm/DM.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
@@ skipping 24 matching lines @@
               "'matrix' or 'upright' in config.");
 DEFINE_bool(gpu_threading, false, "Allow GPU work to run on multiple threads?");
 
 DEFINE_string(blacklist, "",
         "Space-separated config/src/srcOptions/name quadruples to blacklist.  '_' matches anything.  E.g. \n"
         "'--blacklist gpu skp _ _' will blacklist all SKPs drawn into the gpu config.\n"
         "'--blacklist gpu skp _ _ 8888 gm _ aarects' will also blacklist the aarects GM on 8888.");
 
 DEFINE_string2(readPath, r, "", "If set check for equality with golden results in this directory.");
 
+DEFINE_string(uninterestingHashesFile, "",
+        "File containing a list of uninteresting hashes. If a result hashes to something in "
+        "this list, no image is written for that result.");
+
 __SK_FORCE_IMAGE_DECODER_LINKING;
 using namespace DM;
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
 SK_DECLARE_STATIC_MUTEX(gFailuresMutex);
 static SkTArray<SkString> gFailures;
 
 static void fail(ImplicitString err) {
     SkAutoMutexAcquire lock(gFailuresMutex);
@@ skipping 75 matching lines @@
         SkString path(FLAGS_readPath[0]);
         path.append("/dm.json");
         if (!JsonWriter::ReadJson(path.c_str(), add_gold)) {
             fail(SkStringPrintf("Couldn't read %s for golden results.", path.c_str()));
         }
     }
 }
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
+static SkTHashSet<SkString> gUninterestingHashes;
+
+static void gather_uninteresting_hashes() {
+    if (!FLAGS_uninterestingHashesFile.isEmpty()) {
+        SkAutoTUnref<SkData> data(SkData::NewFromFileName(FLAGS_uninterestingHashesFile[0]));
+        SkTArray<SkString> hashes;
+        SkStrSplit((const char*)data->data(), "\n", &hashes);
+        for (const SkString& hash : hashes) {
+            gUninterestingHashes.add(hash);
+        }
+    }
+}
+
+/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
 template <typename T>
 struct Tagged : public SkAutoTDelete<T> {
   const char* tag;
   const char* options;
 };
 
 static const bool kMemcpyOK = true;
 
 static SkTArray<Tagged<Src>,  kMemcpyOK>  gSrcs;
 static SkTArray<Tagged<Sink>, kMemcpyOK> gSinks;
@@ skipping 278 matching lines @@
                                      task->src.options, name, md5))) {
                 fail(SkStringPrintf("%s not found for %s %s %s %s in %s",
                                     md5.c_str(),
                                     task->sink.tag,
                                     task->src.tag,
                                     task->src.options,
                                     name.c_str(),
                                     FLAGS_readPath[0]));
             }
 
-            if (!FLAGS_writePath.isEmpty()) {
+            if (!FLAGS_writePath.isEmpty() && !gUninterestingHashes.contains(md5)) {
                 const char* ext = task->sink->fileExtension();
                 if (data->getLength()) {
                     WriteToDisk(*task, md5, ext, data, data->getLength(), NULL);
                     SkASSERT(bitmap.drawsNothing());
                 } else if (!bitmap.drawsNothing()) {
                     WriteToDisk(*task, md5, ext, NULL, 0, &bitmap);
                 }
             }
         }
         timer.end();
@@ skipping 169 matching lines @@
     SetupCrashHandler();
     SkAutoGraphics ag;
     SkTaskGroup::Enabler enabled(FLAGS_threads);
     if (FLAGS_leaks) {
         SkInstCountPrintLeaksOnExit();
     }
 
     start_keepalive();
 
     gather_gold();
+    gather_uninteresting_hashes();
 
     gather_srcs();
     gather_sinks();
     gather_tests();
 
     gPending = gSrcs.count() * gSinks.count() + gThreadedTests.count() + gGPUTests.count();
     SkDebugf("%d srcs * %d sinks + %d tests == %d tasks\n",
              gSrcs.count(), gSinks.count(), gThreadedTests.count() + gGPUTests.count(), gPending);
 
     // We try to exploit as much parallelism as is safe.  Most Src/Sink pairs run on any thread,
@@ skipping 40 matching lines @@
     }
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif