DM::NullSink

dm/DM.cpp

 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
 #include "OverwriteLine.h"
 #include "ProcStats.h"
 #include "SkBBHFactory.h"
 #include "SkChecksum.h"
 #include "SkCommonFlags.h"
 #include "SkForceLinking.h"
 #include "SkGraphics.h"
@@ skipping 203 matching lines @@
     #if SK_MESA
         SINK("mesa",       GPUSink, Gr::kMESA_GLContextType,   api,  0, false, FLAGS_gpu_threading);
     #endif
     }
 
     if (FLAGS_cpu) {
         SINK("565",  RasterSink, kRGB_565_SkColorType);
         SINK("8888", RasterSink, kN32_SkColorType);
         SINK("pdf",  PDFSink);
         SINK("skp",  SKPSink);
+        SINK("null",  NullSink);
     }
 #undef SINK
     return NULL;
 }
 
 static Sink* create_via(const char* tag, Sink* wrapped) {
 #define VIA(t, via, ...) if (0 == strcmp(t, tag)) { return new via(__VA_ARGS__); }
     VIA("pipe",      ViaPipe,          wrapped);
     VIA("serialize", ViaSerialization, wrapped);
     VIA("tiles",     ViaTiles, 256, 256,               NULL, wrapped);
@@ skipping 98 matching lines @@
                                     task->sink.tag,
                                     task->src.tag,
                                     name.c_str(),
                                     FLAGS_readPath[0]));
             }
 
             if (!FLAGS_writePath.isEmpty()) {
                 const char* ext = task->sink->fileExtension();
                 if (data->getLength()) {
                     WriteToDisk(*task, md5, ext, data, data->getLength(), NULL);
-                } else {
+                    SkASSERT(bitmap.drawsNothing());
+                } else if (!bitmap.drawsNothing()) {
                     WriteToDisk(*task, md5, ext, NULL, 0, &bitmap);
                 }
             }
         }
         timer.end();
         if (!whyBlacklisted.isEmpty()) {
             name.appendf(" (--blacklist, %s)", whyBlacklisted.c_str());
         }
         done(timer.fWall, task->sink.tag, task->src.tag, name);
     }
@@ skipping 189 matching lines @@
     }
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif