Checking for valid colorType, alphaType, colorSpace in SkCodec

tests/CodecTest.cpp

Index: tests/CodecTest.cpp
diff --git a/tests/CodecTest.cpp b/tests/CodecTest.cpp
index 9c60be4b6bf8ac8313297ccf9bf6939fb3c380a9..b01750d41074a42b7b4d4e9139f9bc42b741e1b5 100644
--- a/tests/CodecTest.cpp
+++ b/tests/CodecTest.cpp
@@ -1120,3 +1120,33 @@ DEF_TEST(Codec_PngRoundTrip, r) {
     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);
+}