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Test Codec::getFrameCount updates with more data

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This mimics Chromium's
TestResumePartialDecodeAfterClearFrameBufferCache, which expects the
frame count to increase as more data comes in, even if the decoder is in
the middle of an incremental decode:

https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/image-decoders/image_decoder_test_helpers.cc?l=365&rcl=23787ba147959ebf4ad168c595d5ec87919fdbd2

Bug: skia:8235
Change-Id: Icc19ebea6d77f6b6fb62e3b2ff0c2ffb1ef0950d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/250476
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
This commit is contained in:
Nigel Tao 2019-10-24 15:02:05 +11:00 committed by Skia Commit-Bot
parent 352f4f7800
commit a1cc9f6b84
1 changed files with 30 additions and 0 deletions
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30
tests/CodecPartialTest.cpp
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@ -170,6 +170,36 @@ DEF_TEST(Codec_partialWuffs, r) {
}
}
#ifndef SK_HAS_WUFFS_LIBRARY
DEF_TEST(Codec_frameCountUpdatesInIncrementalDecode, r) {
sk_sp<SkData> file = GetResourceAsData("images/colorTables.gif");
size_t fileSize = file->size();
REPORTER_ASSERT(r, fileSize == 2829);
std::unique_ptr<SkCodec> fullCodec(SkCodec::MakeFromData(file));
REPORTER_ASSERT(r, fullCodec->getFrameCount() == 2);
const SkImageInfo info = standardize_info(fullCodec.get());
static const size_t n = 1000;
HaltingStream* stream = new HaltingStream(file, n);
// Note that we cheat and hold on to a pointer to stream, though it is owned by
// partialCodec.
auto partialCodec = SkCodec::MakeFromStream(std::unique_ptr<SkStream>(stream));
REPORTER_ASSERT(r, partialCodec->getFrameCount() == 1);
SkBitmap bitmap;
bitmap.allocPixels(info);
REPORTER_ASSERT(r, SkCodec::kSuccess ==
partialCodec->startIncrementalDecode(
info, bitmap.getPixels(), bitmap.rowBytes()));
REPORTER_ASSERT(r, SkCodec::kIncompleteInput ==
partialCodec->incrementalDecode());
REPORTER_ASSERT(r, partialCodec->getFrameCount() == 1);
stream->addNewData(fileSize - n);
REPORTER_ASSERT(r, partialCodec->getFrameCount() == 2);
}
#endif
// Verify that when decoding an animated gif byte by byte we report the correct
// fRequiredFrame as soon as getFrameInfo reports the frame.
DEF_TEST(Codec_requiredFrame, r) {