Enable ImageGenerator tests on direct raster and direct gpu backends

dm/DMSrcSink.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "DMSrcSink.h"
 #include "SkAndroidCodec.h"
 #include "SkCodec.h"
@@ skipping 253 matching lines @@
     , fMode(mode)
     , fDstColorType(dstColorType)
     , fDstAlphaType(dstAlphaType)
     , fScale(scale)
     , fRunSerially(serial_from_path_name(path))
 {}
 
 bool CodecSrc::veto(SinkFlags flags) const {
     // Test CodecImageGenerator on 8888, 565, and gpu
     if (kGen_Mode == fMode) {
-        return flags.type != SinkFlags::kRaster || flags.type != SinkFlags::kGPU ||
+        // For image generator, we want to test kDirect approaches for kRaster and kGPU,
+        // while skipping everything else.
+        return (flags.type != SinkFlags::kRaster && flags.type != SinkFlags::kGPU) ||
                 flags.approach != SinkFlags::kDirect;
     }
 
     // Test all other modes to direct raster backends (8888 and 565).
     return flags.type != SinkFlags::kRaster || flags.approach != SinkFlags::kDirect;
 }
 
 // FIXME: Currently we cannot draw unpremultiplied sources. skbug.com/3338 and skbug.com/3339.
 // This allows us to still test unpremultiplied decodes.
 void premultiply_if_necessary(SkBitmap& bitmap) {
@@ skipping 1123 matching lines @@
             skr.visit<void>(i, drawsAsSingletonPictures);
         }
         SkAutoTUnref<SkPicture> macroPic(macroRec.endRecordingAsPicture());
 
         canvas->drawPicture(macroPic);
         return check_against_reference(bitmap, src, fSink);
     });
 }
 
 }  // namespace DM