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- /*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/codec/SkCodec.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkData.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkStream.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTypes.h"
- #include "src/core/SkMakeUnique.h"
- #include "tests/CodecPriv.h"
- #include "tests/FakeStreams.h"
- #include "tests/Test.h"
- #include "tools/Resources.h"
- #include <cstring>
- #include <initializer_list>
- #include <memory>
- #include <utility>
- #include <vector>
- static SkImageInfo standardize_info(SkCodec* codec) {
- SkImageInfo defaultInfo = codec->getInfo();
- // Note: This drops the SkColorSpace, allowing the equality check between two
- // different codecs created from the same file to have the same SkImageInfo.
- return SkImageInfo::MakeN32Premul(defaultInfo.width(), defaultInfo.height());
- }
- static bool create_truth(sk_sp<SkData> data, SkBitmap* dst) {
- std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(std::move(data)));
- if (!codec) {
- return false;
- }
- const SkImageInfo info = standardize_info(codec.get());
- dst->allocPixels(info);
- return SkCodec::kSuccess == codec->getPixels(info, dst->getPixels(), dst->rowBytes());
- }
- static bool compare_bitmaps(skiatest::Reporter* r, const SkBitmap& bm1, const SkBitmap& bm2) {
- const SkImageInfo& info = bm1.info();
- if (info != bm2.info()) {
- ERRORF(r, "Bitmaps have different image infos!");
- return false;
- }
- const size_t rowBytes = info.minRowBytes();
- for (int i = 0; i < info.height(); i++) {
- if (memcmp(bm1.getAddr(0, i), bm2.getAddr(0, i), rowBytes)) {
- ERRORF(r, "Bitmaps have different pixels, starting on line %i!", i);
- return false;
- }
- }
- return true;
- }
- static void test_partial(skiatest::Reporter* r, const char* name, const sk_sp<SkData>& file,
- size_t minBytes, size_t increment) {
- SkBitmap truth;
- if (!create_truth(file, &truth)) {
- ERRORF(r, "Failed to decode %s\n", name);
- return;
- }
- // Now decode part of the file
- HaltingStream* stream = new HaltingStream(file, minBytes);
- // 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));
- if (!partialCodec) {
- ERRORF(r, "Failed to create codec for %s with %zu bytes", name, minBytes);
- return;
- }
- const SkImageInfo info = standardize_info(partialCodec.get());
- SkASSERT(info == truth.info());
- SkBitmap incremental;
- incremental.allocPixels(info);
- while (true) {
- const SkCodec::Result startResult = partialCodec->startIncrementalDecode(info,
- incremental.getPixels(), incremental.rowBytes());
- if (startResult == SkCodec::kSuccess) {
- break;
- }
- if (stream->isAllDataReceived()) {
- ERRORF(r, "Failed to start incremental decode\n");
- return;
- }
- stream->addNewData(increment);
- }
- while (true) {
- // This imitates how Chromium calls getFrameCount before resuming a decode.
- partialCodec->getFrameCount();
- const SkCodec::Result result = partialCodec->incrementalDecode();
- if (result == SkCodec::kSuccess) {
- break;
- }
- REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
- if (stream->isAllDataReceived()) {
- ERRORF(r, "Failed to completely decode %s", name);
- return;
- }
- stream->addNewData(increment);
- }
- // compare to original
- compare_bitmaps(r, truth, incremental);
- }
- static void test_partial(skiatest::Reporter* r, const char* name, size_t minBytes = 0) {
- sk_sp<SkData> file = GetResourceAsData(name);
- if (!file) {
- SkDebugf("missing resource %s\n", name);
- return;
- }
- // This size is arbitrary, but deliberately different from the buffer size used by SkPngCodec.
- constexpr size_t kIncrement = 1000;
- test_partial(r, name, file, SkTMax(file->size() / 2, minBytes), kIncrement);
- }
- DEF_TEST(Codec_partial, r) {
- #if 0
- // FIXME (scroggo): SkPngCodec needs to use SkStreamBuffer in order to
- // support incremental decoding.
- test_partial(r, "images/plane.png");
- test_partial(r, "images/plane_interlaced.png");
- test_partial(r, "images/yellow_rose.png");
- test_partial(r, "images/index8.png");
- test_partial(r, "images/color_wheel.png");
- test_partial(r, "images/mandrill_256.png");
- test_partial(r, "images/mandrill_32.png");
- test_partial(r, "images/arrow.png");
- test_partial(r, "images/randPixels.png");
- test_partial(r, "images/baby_tux.png");
- #endif
- test_partial(r, "images/box.gif");
- test_partial(r, "images/randPixels.gif", 215);
- test_partial(r, "images/color_wheel.gif");
- }
- DEF_TEST(Codec_partialWuffs, r) {
- const char* path = "images/alphabetAnim.gif";
- auto file = GetResourceAsData(path);
- if (!file) {
- ERRORF(r, "missing %s", path);
- } else {
- // This is the end of the first frame. SkCodec will treat this as a
- // single frame gif.
- file = SkData::MakeSubset(file.get(), 0, 153);
- // Start with 100 to get a partial decode, then add the rest of the
- // first frame to decode a full image.
- test_partial(r, path, file, 100, 53);
- }
- }
- // 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) {
- auto path = "images/colorTables.gif";
- sk_sp<SkData> file = GetResourceAsData(path);
- if (!file) {
- return;
- }
- std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(file));
- if (!codec) {
- ERRORF(r, "Failed to create codec from %s", path);
- return;
- }
- auto frameInfo = codec->getFrameInfo();
- if (frameInfo.size() <= 1) {
- ERRORF(r, "Test is uninteresting with 0 or 1 frames");
- return;
- }
- HaltingStream* stream(nullptr);
- std::unique_ptr<SkCodec> partialCodec(nullptr);
- for (size_t i = 0; !partialCodec; i++) {
- if (file->size() == i) {
- ERRORF(r, "Should have created a partial codec for %s", path);
- return;
- }
- stream = new HaltingStream(file, i);
- partialCodec = SkCodec::MakeFromStream(std::unique_ptr<SkStream>(stream));
- }
- std::vector<SkCodec::FrameInfo> partialInfo;
- size_t frameToCompare = 0;
- while (true) {
- partialInfo = partialCodec->getFrameInfo();
- for (; frameToCompare < partialInfo.size(); frameToCompare++) {
- REPORTER_ASSERT(r, partialInfo[frameToCompare].fRequiredFrame
- == frameInfo[frameToCompare].fRequiredFrame);
- }
- if (frameToCompare == frameInfo.size()) {
- break;
- }
- if (stream->getLength() == file->size()) {
- ERRORF(r, "Should have found all frames for %s", path);
- return;
- }
- stream->addNewData(1);
- }
- }
- DEF_TEST(Codec_partialAnim, r) {
- auto path = "images/test640x479.gif";
- sk_sp<SkData> file = GetResourceAsData(path);
- if (!file) {
- return;
- }
- // This stream will be owned by fullCodec, but we hang on to the pointer
- // to determine frame offsets.
- std::unique_ptr<SkCodec> fullCodec(SkCodec::MakeFromStream(skstd::make_unique<SkMemoryStream>(file)));
- const auto info = standardize_info(fullCodec.get());
- // frameByteCounts stores the number of bytes to decode a particular frame.
- // - [0] is the number of bytes for the header
- // - frames[i] requires frameByteCounts[i+1] bytes to decode
- const std::vector<size_t> frameByteCounts = { 455, 69350, 1344, 1346, 1327 };
- std::vector<SkBitmap> frames;
- for (size_t i = 0; true; i++) {
- SkBitmap frame;
- frame.allocPixels(info);
- SkCodec::Options opts;
- opts.fFrameIndex = i;
- const SkCodec::Result result = fullCodec->getPixels(info, frame.getPixels(),
- frame.rowBytes(), &opts);
- if (result == SkCodec::kIncompleteInput || result == SkCodec::kInvalidInput) {
- // We need to distinguish between a partial frame and no more frames.
- // getFrameInfo lets us do this, since it tells the number of frames
- // not considering whether they are complete.
- // FIXME: Should we use a different Result?
- if (fullCodec->getFrameInfo().size() > i) {
- // This is a partial frame.
- frames.push_back(frame);
- }
- break;
- }
- if (result != SkCodec::kSuccess) {
- ERRORF(r, "Failed to decode frame %i from %s", i, path);
- return;
- }
- frames.push_back(frame);
- }
- // Now decode frames partially, then completely, and compare to the original.
- HaltingStream* haltingStream = new HaltingStream(file, frameByteCounts[0]);
- std::unique_ptr<SkCodec> partialCodec(SkCodec::MakeFromStream(
- std::unique_ptr<SkStream>(haltingStream)));
- if (!partialCodec) {
- ERRORF(r, "Failed to create a partial codec from %s with %i bytes out of %i",
- path, frameByteCounts[0], file->size());
- return;
- }
- SkASSERT(frameByteCounts.size() > frames.size());
- for (size_t i = 0; i < frames.size(); i++) {
- const size_t fullFrameBytes = frameByteCounts[i + 1];
- const size_t firstHalf = fullFrameBytes / 2;
- const size_t secondHalf = fullFrameBytes - firstHalf;
- haltingStream->addNewData(firstHalf);
- auto frameInfo = partialCodec->getFrameInfo();
- REPORTER_ASSERT(r, frameInfo.size() == i + 1);
- REPORTER_ASSERT(r, !frameInfo[i].fFullyReceived);
- SkBitmap frame;
- frame.allocPixels(info);
- SkCodec::Options opts;
- opts.fFrameIndex = i;
- SkCodec::Result result = partialCodec->startIncrementalDecode(info,
- frame.getPixels(), frame.rowBytes(), &opts);
- if (result != SkCodec::kSuccess) {
- ERRORF(r, "Failed to start incremental decode for %s on frame %i",
- path, i);
- return;
- }
- result = partialCodec->incrementalDecode();
- REPORTER_ASSERT(r, SkCodec::kIncompleteInput == result);
- haltingStream->addNewData(secondHalf);
- result = partialCodec->incrementalDecode();
- REPORTER_ASSERT(r, SkCodec::kSuccess == result);
- frameInfo = partialCodec->getFrameInfo();
- REPORTER_ASSERT(r, frameInfo.size() == i + 1);
- REPORTER_ASSERT(r, frameInfo[i].fFullyReceived);
- if (!compare_bitmaps(r, frames[i], frame)) {
- ERRORF(r, "\tfailure was on frame %i", i);
- SkString name = SkStringPrintf("expected_%i", i);
- write_bm(name.c_str(), frames[i]);
- name = SkStringPrintf("actual_%i", i);
- write_bm(name.c_str(), frame);
- }
- }
- }
- // Test that calling getPixels when an incremental decode has been
- // started (but not finished) makes the next call to incrementalDecode
- // require a call to startIncrementalDecode.
- static void test_interleaved(skiatest::Reporter* r, const char* name) {
- sk_sp<SkData> file = GetResourceAsData(name);
- if (!file) {
- return;
- }
- const size_t halfSize = file->size() / 2;
- std::unique_ptr<SkCodec> partialCodec(SkCodec::MakeFromStream(
- skstd::make_unique<HaltingStream>(std::move(file), halfSize)));
- if (!partialCodec) {
- ERRORF(r, "Failed to create codec for %s", name);
- return;
- }
- const SkImageInfo info = standardize_info(partialCodec.get());
- SkBitmap incremental;
- incremental.allocPixels(info);
- const SkCodec::Result startResult = partialCodec->startIncrementalDecode(info,
- incremental.getPixels(), incremental.rowBytes());
- if (startResult != SkCodec::kSuccess) {
- ERRORF(r, "Failed to start incremental decode\n");
- return;
- }
- SkCodec::Result result = partialCodec->incrementalDecode();
- REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
- SkBitmap full;
- full.allocPixels(info);
- result = partialCodec->getPixels(info, full.getPixels(), full.rowBytes());
- REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
- // Now incremental decode will fail
- result = partialCodec->incrementalDecode();
- REPORTER_ASSERT(r, result == SkCodec::kInvalidParameters);
- }
- DEF_TEST(Codec_rewind, r) {
- test_interleaved(r, "images/plane.png");
- test_interleaved(r, "images/plane_interlaced.png");
- test_interleaved(r, "images/box.gif");
- }
- // Modified version of the giflib logo, from
- // http://giflib.sourceforge.net/whatsinagif/bits_and_bytes.html
- // The global color map has been replaced with a local color map.
- static unsigned char gNoGlobalColorMap[] = {
- // Header
- 0x47, 0x49, 0x46, 0x38, 0x39, 0x61,
- // Logical screen descriptor
- 0x0A, 0x00, 0x0A, 0x00, 0x11, 0x00, 0x00,
- // Image descriptor
- 0x2C, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x0A, 0x00, 0x81,
- // Local color table
- 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00,
- // Image data
- 0x02, 0x16, 0x8C, 0x2D, 0x99, 0x87, 0x2A, 0x1C, 0xDC, 0x33, 0xA0, 0x02, 0x75,
- 0xEC, 0x95, 0xFA, 0xA8, 0xDE, 0x60, 0x8C, 0x04, 0x91, 0x4C, 0x01, 0x00,
- // Trailer
- 0x3B,
- };
- // Test that a gif file truncated before its local color map behaves as expected.
- DEF_TEST(Codec_GifPreMap, r) {
- sk_sp<SkData> data = SkData::MakeWithoutCopy(gNoGlobalColorMap, sizeof(gNoGlobalColorMap));
- std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(data));
- if (!codec) {
- ERRORF(r, "failed to create codec");
- return;
- }
- SkBitmap truth;
- auto info = standardize_info(codec.get());
- truth.allocPixels(info);
- auto result = codec->getPixels(info, truth.getPixels(), truth.rowBytes());
- REPORTER_ASSERT(r, result == SkCodec::kSuccess);
- // Truncate to 23 bytes, just before the color map. This should fail to decode.
- //
- // See also Codec_GifTruncated2 in GifTest.cpp for this magic 23.
- codec = SkCodec::MakeFromData(SkData::MakeWithoutCopy(gNoGlobalColorMap, 23));
- REPORTER_ASSERT(r, codec);
- if (codec) {
- SkBitmap bm;
- bm.allocPixels(info);
- result = codec->getPixels(info, bm.getPixels(), bm.rowBytes());
- // See the comments in Codec_GifTruncated2.
- #ifdef SK_HAS_WUFFS_LIBRARY
- REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
- #else
- REPORTER_ASSERT(r, result == SkCodec::kInvalidInput);
- #endif
- }
- // Again, truncate to 23 bytes, this time for an incremental decode. We
- // cannot start an incremental decode until we have more data. If we did,
- // we would be using the wrong color table.
- HaltingStream* stream = new HaltingStream(data, 23);
- codec = SkCodec::MakeFromStream(std::unique_ptr<SkStream>(stream));
- REPORTER_ASSERT(r, codec);
- if (codec) {
- SkBitmap bm;
- bm.allocPixels(info);
- result = codec->startIncrementalDecode(info, bm.getPixels(), bm.rowBytes());
- // See the comments in Codec_GifTruncated2.
- #ifdef SK_HAS_WUFFS_LIBRARY
- REPORTER_ASSERT(r, result == SkCodec::kSuccess);
- // Note that this is incrementalDecode, not startIncrementalDecode.
- result = codec->incrementalDecode();
- REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
- stream->addNewData(data->size());
- #else
- REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
- // Note that this is startIncrementalDecode, not incrementalDecode.
- stream->addNewData(data->size());
- result = codec->startIncrementalDecode(info, bm.getPixels(), bm.rowBytes());
- REPORTER_ASSERT(r, result == SkCodec::kSuccess);
- #endif
- result = codec->incrementalDecode();
- REPORTER_ASSERT(r, result == SkCodec::kSuccess);
- compare_bitmaps(r, truth, bm);
- }
- }
- DEF_TEST(Codec_emptyIDAT, r) {
- const char* name = "images/baby_tux.png";
- sk_sp<SkData> file = GetResourceAsData(name);
- if (!file) {
- return;
- }
- // Truncate to the beginning of the IDAT, immediately after the IDAT tag.
- file = SkData::MakeSubset(file.get(), 0, 80);
- std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(std::move(file)));
- if (!codec) {
- ERRORF(r, "Failed to create a codec for %s", name);
- return;
- }
- SkBitmap bm;
- const auto info = standardize_info(codec.get());
- bm.allocPixels(info);
- const auto result = codec->getPixels(info, bm.getPixels(), bm.rowBytes());
- REPORTER_ASSERT(r, SkCodec::kIncompleteInput == result);
- }
- DEF_TEST(Codec_incomplete, r) {
- for (const char* name : { "images/baby_tux.png",
- "images/baby_tux.webp",
- "images/CMYK.jpg",
- "images/color_wheel.gif",
- "images/google_chrome.ico",
- "images/rle.bmp",
- "images/mandrill.wbmp",
- }) {
- sk_sp<SkData> file = GetResourceAsData(name);
- if (!file) {
- continue;
- }
- for (size_t len = 14; len <= file->size(); len += 5) {
- SkCodec::Result result;
- std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(
- skstd::make_unique<SkMemoryStream>(file->data(), len), &result));
- if (codec) {
- if (result != SkCodec::kSuccess) {
- ERRORF(r, "Created an SkCodec for %s with %lu bytes, but "
- "reported an error %i", name, len, result);
- }
- break;
- }
- if (SkCodec::kIncompleteInput != result) {
- ERRORF(r, "Reported error %i for %s with %lu bytes",
- result, name, len);
- break;
- }
- }
- }
- }
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