Make SkPicture/SkImageGenerator default to SkCodec

tests/PictureTest.cpp

Index: tests/PictureTest.cpp
diff --git a/tests/PictureTest.cpp b/tests/PictureTest.cpp
index 3d05a824a26556ad02c281b21723bcc2fdda8567..448e079958ef5a01444fc0c5a9b009c16325b27e 100644
--- a/tests/PictureTest.cpp
+++ b/tests/PictureTest.cpp
@@ -17,6 +17,7 @@
 #include "SkImageEncoder.h"
 #include "SkImageGenerator.h"
 #include "SkLayerInfo.h"
+#include "SkMD5.h"
 #include "SkPaint.h"
 #include "SkPicture.h"
 #include "SkPictureRecorder.h"
@@ -871,7 +872,18 @@ static void assert_one_parse_error_cb(SkError error, void* context) {
                             SkGetLastErrorString());
 }
 
-static void test_bitmap_with_encoded_data(skiatest::Reporter* reporter) {
+static void md5(const SkBitmap& bm, SkMD5::Digest* digest) {
+    SkAutoLockPixels autoLockPixels(bm);
+    SkASSERT(bm.getPixels());
+    SkMD5 md5;
+    size_t rowLen = bm.info().bytesPerPixel() * bm.width();
+    for (int y = 0; y < bm.height(); ++y) {
+        md5.update(static_cast<uint8_t*>(bm.getAddr(0, y)), rowLen);
+    }
+    md5.finish(*digest);
+}
+
+DEF_TEST(Picture_EncodedData, reporter) {
     // Create a bitmap that will be encoded.
     SkBitmap original;
     make_bm(&original, 100, 100, SK_ColorBLUE, true);
@@ -891,6 +903,7 @@ static void test_bitmap_with_encoded_data(skiatest::Reporter* reporter) {
     SkAutoDataUnref picture1(serialized_picture_from_bitmap(original));
     SkAutoDataUnref picture2(serialized_picture_from_bitmap(bm));
     REPORTER_ASSERT(reporter, picture1->equals(picture2));
+
     // Now test that a parse error was generated when trying to create a new SkPicture without
     // providing a function to decode the bitmap.
     ErrorContext context;
@@ -903,6 +916,24 @@ static void test_bitmap_with_encoded_data(skiatest::Reporter* reporter) {
     REPORTER_ASSERT(reporter, pictureFromStream.get() != nullptr);
     SkClearLastError();
     SkSetErrorCallback(nullptr, nullptr);
+
+    // Test that using the version of CreateFromStream that just takes a stream also decodes the
+    // bitmap. Drawing this picture should look exactly like the original bitmap.
+    SkMD5::Digest referenceDigest;
+    md5(original, &referenceDigest);
+
+    SkBitmap dst;
+    dst.allocPixels(original.info());
+    dst.eraseColor(SK_ColorRED);
+    SkCanvas canvas(dst);
+
+    pictureStream.rewind();
+    pictureFromStream.reset(SkPicture::CreateFromStream(&pictureStream));
+    canvas.drawPicture(pictureFromStream.get());
+
+    SkMD5::Digest digest2;
+    md5(dst, &digest2);
+    REPORTER_ASSERT(reporter, referenceDigest == digest2);
 }
 
 static void test_clip_bound_opt(skiatest::Reporter* reporter) {
@@ -1174,7 +1205,6 @@ DEF_TEST(Picture, reporter) {
     test_has_text(reporter);
     test_images_are_found_by_willPlayBackBitmaps(reporter);
     test_analysis(reporter);
-    test_bitmap_with_encoded_data(reporter);
     test_clip_bound_opt(reporter);
     test_clip_expansion(reporter);
     test_hierarchical(reporter);