Test unpremul decodes

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 293 matching lines @@
             break;
     }
 
     switch (dstAlphaType) {
         case kOpaque_SkAlphaType:
             folder.append("_opaque");
             break;
         case kPremul_SkAlphaType:
             folder.append("_premul");
             break;
+        case kUnpremul_SkAlphaType:
+            folder.append("_unpremul");
+            break;
         default:
             break;
     }
 
     if (1 != sampleSize) {
         folder.appendf("_%.3f", 1.0f / (float) sampleSize);
     }
 
     AndroidCodecSrc* src = new AndroidCodecSrc(path, mode, dstColorType, dstAlphaType, sampleSize);
     push_src("image", folder, src);
@@ skipping 40 matching lines @@
             numColorTypes = 2;
             break;
         default:
             colorTypes[0] = CodecSrc::kGetFromCanvas_DstColorType;
             numColorTypes = 1;
             break;
     }
 
     SkTArray<SkAlphaType> alphaModes;
     alphaModes.push_back(kPremul_SkAlphaType);
-    // FIXME: Currently we cannot draw unpremultiplied sources. skbug.com/3338 and skbug.com/3339
-    // alphaModes.push_back(kUnpremul_SkAlphaType);
+    alphaModes.push_back(kUnpremul_SkAlphaType);

[msarett, 2016/02/03 20:06:36]

If we feel that this is too much, I'd be fine with only testing in some codec
modes or scales.

But obviously this gives us the best coverage.

     if (codec->getInfo().alphaType() == kOpaque_SkAlphaType) {
         alphaModes.push_back(kOpaque_SkAlphaType);
     }
 
     for (CodecSrc::Mode mode : nativeModes) {
         // SkCodecImageGenerator only runs for the default colorType
         // recommended by SkCodec.  There is no need to generate multiple
         // tests for different colorTypes.
         // TODO (msarett): Add scaling support to SkCodecImageGenerator.
         if (CodecSrc::kGen_Mode == mode) {
@@ skipping 915 matching lines @@
                                                            Reporter* reporter,
                                                            GrContextFactory* factory);
 } // namespace skiatest
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif