Checking for valid colorType, alphaType, colorSpace in SkCodec

tests/CodecTest.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 "Resources.h"
 #include "SkAndroidCodec.h"
 #include "SkBitmap.h"
@@ skipping 1102 matching lines @@
     // Create an arbitrary gray bitmap.
     path = "grayscale.jpg";
     stream.reset(resource(path));
     codec.reset(SkCodec::NewFromStream(stream.release()));
     SkBitmap bm2;
     bm2.allocPixels(codec->getInfo());
     result = codec->getPixels(codec->getInfo(), bm2.getPixels(), bm2.rowBytes());
     REPORTER_ASSERT(r, SkCodec::kSuccess == result);
     check_round_trip(r, bm2);
 }
+
+static void test_conversion_possible(skiatest::Reporter* r, const char* path,
+                                     bool testScanlineDecoder) {
+    SkAutoTDelete<SkStream> stream(resource(path));
+    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.release()));
+    SkImageInfo infoF16 = codec->getInfo().makeColorType(kRGBA_F16_SkColorType);
+
+    SkBitmap bm;
+    bm.allocPixels(infoF16);
+    SkCodec::Result result = codec->getPixels(infoF16, bm.getPixels(), bm.rowBytes());
+    REPORTER_ASSERT(r, SkCodec::kInvalidConversion == result);
+    if (testScanlineDecoder) {
+        result = codec->startScanlineDecode(infoF16);
+        REPORTER_ASSERT(r, SkCodec::kInvalidConversion == result);
+    }
+
+    infoF16 = infoF16.makeColorSpace(infoF16.colorSpace()->makeLinearGamma());
+    result = codec->getPixels(infoF16, bm.getPixels(), bm.rowBytes());
+    REPORTER_ASSERT(r, SkCodec::kSuccess == result);
+    if (testScanlineDecoder) {
+        result = codec->startScanlineDecode(infoF16);
+        REPORTER_ASSERT(r, SkCodec::kSuccess == result);
+    }
+}
+
+DEF_TEST(Codec_F16ConversionPossible, r) {
+    test_conversion_possible(r, "color_wheel.webp", false);
+    test_conversion_possible(r, "mandrill_512_q075.jpg", true);
+    test_conversion_possible(r, "yellow_rose.png", true);
+}