/*
* 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 "FakeStreams.h"
#include "Resources.h"
#include "SkAndroidCodec.h"
#include "SkAutoMalloc.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkCodec.h"
#include "SkCodecImageGenerator.h"
#include "SkColor.h"
#include "SkColorSpace.h"
#include "SkColorSpacePriv.h"
#include "SkData.h"
#include "SkEncodedImageFormat.h"
#include "SkFrontBufferedStream.h"
#include "SkImage.h"
#include "SkImageGenerator.h"
#include "SkImageInfo.h"
#include "SkJpegEncoder.h"
#include "SkMD5.h"
#include "SkMakeUnique.h"
#include "SkMalloc.h"
#include "SkPixmap.h"
#include "SkPngChunkReader.h"
#include "SkPngEncoder.h"
#include "SkRandom.h"
#include "SkRect.h"
#include "SkRefCnt.h"
#include "SkSize.h"
#include "SkStream.h"
#include "SkStreamPriv.h"
#include "SkString.h"
#include "SkTemplates.h"
#include "SkTypes.h"
#include "SkUnPreMultiply.h"
#include "SkWebpEncoder.h"
#include "Test.h"
#include "png.h"
#include "sk_tool_utils.h"
#include <setjmp.h>
#include <cstring>
#include <memory>
#include <utility>
#include <vector>
#if PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR < 5
// FIXME (scroggo): Google3 needs to be updated to use a newer version of libpng. In
// the meantime, we had to break some pieces of SkPngCodec in order to support Google3.
// The parts that are broken are likely not used by Google3.
#define SK_PNG_DISABLE_TESTS
#endif
static void md5(const SkBitmap& bm, SkMD5::Digest* digest) {
SkASSERT(bm.getPixels());
SkMD5 md5;
size_t rowLen = bm.info().bytesPerPixel() * bm.width();
for (int y = 0; y < bm.height(); ++y) {
md5.write(bm.getAddr(0, y), rowLen);
}
md5.finish(*digest);
}
/**
* Compute the digest for bm and compare it to a known good digest.
* @param r Reporter to assert that bm's digest matches goodDigest.
* @param goodDigest The known good digest to compare to.
* @param bm The bitmap to test.
*/
static void compare_to_good_digest(skiatest::Reporter* r, const SkMD5::Digest& goodDigest,
const SkBitmap& bm) {
SkMD5::Digest digest;
md5(bm, &digest);
REPORTER_ASSERT(r, digest == goodDigest);
}
/**
* Test decoding an SkCodec to a particular SkImageInfo.
*
* Calling getPixels(info) should return expectedResult, and if goodDigest is non nullptr,
* the resulting decode should match.
*/
template<typename Codec>
static void test_info(skiatest::Reporter* r, Codec* codec, const SkImageInfo& info,
SkCodec::Result expectedResult, const SkMD5::Digest* goodDigest) {
SkBitmap bm;
bm.allocPixels(info);
SkCodec::Result result = codec->getPixels(info, bm.getPixels(), bm.rowBytes());
REPORTER_ASSERT(r, result == expectedResult);
if (goodDigest) {
compare_to_good_digest(r, *goodDigest, bm);
}
}
SkIRect generate_random_subset(SkRandom* rand, int w, int h) {
SkIRect rect;
do {
rect.fLeft = rand->nextRangeU(0, w);
rect.fTop = rand->nextRangeU(0, h);
rect.fRight = rand->nextRangeU(0, w);
rect.fBottom = rand->nextRangeU(0, h);
rect.sort();
} while (rect.isEmpty());
return rect;
}
static void test_incremental_decode(skiatest::Reporter* r, SkCodec* codec, const SkImageInfo& info,
const SkMD5::Digest& goodDigest) {
SkBitmap bm;
bm.allocPixels(info);
REPORTER_ASSERT(r, SkCodec::kSuccess == codec->startIncrementalDecode(info, bm.getPixels(),
bm.rowBytes()));
REPORTER_ASSERT(r, SkCodec::kSuccess == codec->incrementalDecode());
compare_to_good_digest(r, goodDigest, bm);
}
// Test in stripes, similar to DM's kStripe_Mode
static void test_in_stripes(skiatest::Reporter* r, SkCodec* codec, const SkImageInfo& info,
const SkMD5::Digest& goodDigest) {
SkBitmap bm;
bm.allocPixels(info);
bm.eraseColor(SK_ColorYELLOW);
const int height = info.height();
// Note that if numStripes does not evenly divide height there will be an extra
// stripe.
const int numStripes = 4;
if (numStripes > height) {
// Image is too small.
return;
}
const int stripeHeight = height / numStripes;
// Iterate through the image twice. Once to decode odd stripes, and once for even.
for (int oddEven = 1; oddEven >= 0; oddEven--) {
for (int y = oddEven * stripeHeight; y < height; y += 2 * stripeHeight) {
SkIRect subset = SkIRect::MakeLTRB(0, y, info.width(),
SkTMin(y + stripeHeight, height));
SkCodec::Options options;
options.fSubset = ⊂
if (SkCodec::kSuccess != codec->startIncrementalDecode(info, bm.getAddr(0, y),
bm.rowBytes(), &options)) {
ERRORF(r, "failed to start incremental decode!\ttop: %i\tbottom%i\n",
subset.top(), subset.bottom());
return;
}
if (SkCodec::kSuccess != codec->incrementalDecode()) {
ERRORF(r, "failed incremental decode starting from line %i\n", y);
return;
}
}
}
compare_to_good_digest(r, goodDigest, bm);
}
template<typename Codec>
static void test_codec(skiatest::Reporter* r, const char* path, Codec* codec, SkBitmap& bm,
const SkImageInfo& info, const SkISize& size, SkCodec::Result expectedResult,
SkMD5::Digest* digest, const SkMD5::Digest* goodDigest) {
REPORTER_ASSERT(r, info.dimensions() == size);
bm.allocPixels(info);
SkCodec::Result result = codec->getPixels(info, bm.getPixels(), bm.rowBytes());
REPORTER_ASSERT(r, result == expectedResult);
md5(bm, digest);
if (goodDigest) {
REPORTER_ASSERT(r, *digest == *goodDigest);
}
{
// Test decoding to 565
SkImageInfo info565 = info.makeColorType(kRGB_565_SkColorType);
if (info.alphaType() == kOpaque_SkAlphaType) {
// Decoding to 565 should succeed.
SkBitmap bm565;
bm565.allocPixels(info565);
// This will allow comparison even if the image is incomplete.
bm565.eraseColor(SK_ColorBLACK);
auto actualResult = codec->getPixels(info565, bm565.getPixels(), bm565.rowBytes());
if (actualResult == expectedResult) {
SkMD5::Digest digest565;
md5(bm565, &digest565);
// A request for non-opaque should also succeed.
for (auto alpha : { kPremul_SkAlphaType, kUnpremul_SkAlphaType }) {
info565 = info565.makeAlphaType(alpha);
test_info(r, codec, info565, expectedResult, &digest565);
}
} else {
ERRORF(r, "Decoding %s to 565 failed with result \"%s\"\n\t\t\t\texpected:\"%s\"",
path,
SkCodec::ResultToString(actualResult),
SkCodec::ResultToString(expectedResult));
}
} else {
test_info(r, codec, info565, SkCodec::kInvalidConversion, nullptr);
}
}
if (codec->getInfo().colorType() == kGray_8_SkColorType) {
SkImageInfo grayInfo = codec->getInfo();
SkBitmap grayBm;
grayBm.allocPixels(grayInfo);
grayBm.eraseColor(SK_ColorBLACK);
REPORTER_ASSERT(r, expectedResult == codec->getPixels(grayInfo,
grayBm.getPixels(), grayBm.rowBytes()));
SkMD5::Digest grayDigest;
md5(grayBm, &grayDigest);
for (auto alpha : { kPremul_SkAlphaType, kUnpremul_SkAlphaType }) {
grayInfo = grayInfo.makeAlphaType(alpha);
test_info(r, codec, grayInfo, expectedResult, &grayDigest);
}
}
// Verify that re-decoding gives the same result. It is interesting to check this after
// a decode to 565, since choosing to decode to 565 may result in some of the decode
// options being modified. These options should return to their defaults on another
// decode to kN32, so the new digest should match the old digest.
test_info(r, codec, info, expectedResult, digest);
{
// Check alpha type conversions
if (info.alphaType() == kOpaque_SkAlphaType) {
test_info(r, codec, info.makeAlphaType(kUnpremul_SkAlphaType),
expectedResult, digest);
test_info(r, codec, info.makeAlphaType(kPremul_SkAlphaType),
expectedResult, digest);
} else {
// Decoding to opaque should fail
test_info(r, codec, info.makeAlphaType(kOpaque_SkAlphaType),
SkCodec::kInvalidConversion, nullptr);
SkAlphaType otherAt = info.alphaType();
if (kPremul_SkAlphaType == otherAt) {
otherAt = kUnpremul_SkAlphaType;
} else {
otherAt = kPremul_SkAlphaType;
}
// The other non-opaque alpha type should always succeed, but not match.
test_info(r, codec, info.makeAlphaType(otherAt), expectedResult, nullptr);
}
}
}
static bool supports_partial_scanlines(const char path[]) {
static const char* const exts[] = {
"jpg", "jpeg", "png", "webp"
"JPG", "JPEG", "PNG", "WEBP"
};
for (uint32_t i = 0; i < SK_ARRAY_COUNT(exts); i++) {
if (SkStrEndsWith(path, exts[i])) {
return true;
}
}
return false;
}
// FIXME: Break up this giant function
static void check(skiatest::Reporter* r,
const char path[],
SkISize size,
bool supportsScanlineDecoding,
bool supportsSubsetDecoding,
bool supportsIncomplete,
bool supportsNewScanlineDecoding = false) {
// If we're testing incomplete decodes, let's run the same test on full decodes.
if (supportsIncomplete) {
check(r, path, size, supportsScanlineDecoding, supportsSubsetDecoding, false,
supportsNewScanlineDecoding);
}
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
if (!stream) {
return;
}
std::unique_ptr<SkCodec> codec(nullptr);
if (supportsIncomplete) {
size_t size = stream->getLength();
codec = SkCodec::MakeFromData(SkData::MakeFromStream(stream.get(), 2 * size / 3));
} else {
codec = SkCodec::MakeFromStream(std::move(stream));
}
if (!codec) {
ERRORF(r, "Unable to decode '%s'", path);
return;
}
// Test full image decodes with SkCodec
SkMD5::Digest codecDigest;
const SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
SkBitmap bm;
SkCodec::Result expectedResult =
supportsIncomplete ? SkCodec::kIncompleteInput : SkCodec::kSuccess;
test_codec(r, path, codec.get(), bm, info, size, expectedResult, &codecDigest, nullptr);
// Scanline decoding follows.
if (supportsNewScanlineDecoding && !supportsIncomplete) {
test_incremental_decode(r, codec.get(), info, codecDigest);
// This is only supported by codecs that use incremental decoding to
// support subset decodes - png and jpeg (once SkJpegCodec is
// converted).
if (SkStrEndsWith(path, "png") || SkStrEndsWith(path, "PNG")) {
test_in_stripes(r, codec.get(), info, codecDigest);
}
}
// Need to call startScanlineDecode() first.
REPORTER_ASSERT(r, codec->getScanlines(bm.getAddr(0, 0), 1, 0) == 0);
REPORTER_ASSERT(r, !codec->skipScanlines(1));
const SkCodec::Result startResult = codec->startScanlineDecode(info);
if (supportsScanlineDecoding) {
bm.eraseColor(SK_ColorYELLOW);
REPORTER_ASSERT(r, startResult == SkCodec::kSuccess);
for (int y = 0; y < info.height(); y++) {
const int lines = codec->getScanlines(bm.getAddr(0, y), 1, 0);
if (!supportsIncomplete) {
REPORTER_ASSERT(r, 1 == lines);
}
}
// verify that scanline decoding gives the same result.
if (SkCodec::kTopDown_SkScanlineOrder == codec->getScanlineOrder()) {
compare_to_good_digest(r, codecDigest, bm);
}
// Cannot continue to decode scanlines beyond the end
REPORTER_ASSERT(r, codec->getScanlines(bm.getAddr(0, 0), 1, 0)
== 0);
// Interrupting a scanline decode with a full decode starts from
// scratch
REPORTER_ASSERT(r, codec->startScanlineDecode(info) == SkCodec::kSuccess);
const int lines = codec->getScanlines(bm.getAddr(0, 0), 1, 0);
if (!supportsIncomplete) {
REPORTER_ASSERT(r, lines == 1);
}
REPORTER_ASSERT(r, codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes())
== expectedResult);
REPORTER_ASSERT(r, codec->getScanlines(bm.getAddr(0, 0), 1, 0)
== 0);
REPORTER_ASSERT(r, codec->skipScanlines(1)
== 0);
// Test partial scanline decodes
if (supports_partial_scanlines(path) && info.width() >= 3) {
SkCodec::Options options;
int width = info.width();
int height = info.height();
SkIRect subset = SkIRect::MakeXYWH(2 * (width / 3), 0, width / 3, height);
options.fSubset = ⊂
const auto partialStartResult = codec->startScanlineDecode(info, &options);
REPORTER_ASSERT(r, partialStartResult == SkCodec::kSuccess);
for (int y = 0; y < height; y++) {
const int lines = codec->getScanlines(bm.getAddr(0, y), 1, 0);
if (!supportsIncomplete) {
REPORTER_ASSERT(r, 1 == lines);
}
}
}
} else {
REPORTER_ASSERT(r, startResult == SkCodec::kUnimplemented);
}
// The rest of this function tests decoding subsets, and will decode an arbitrary number of
// random subsets.
// Do not attempt to decode subsets of an image of only once pixel, since there is no
// meaningful subset.
if (size.width() * size.height() == 1) {
return;
}
SkRandom rand;
SkIRect subset;
SkCodec::Options opts;
opts.fSubset = ⊂
for (int i = 0; i < 5; i++) {
subset = generate_random_subset(&rand, size.width(), size.height());
SkASSERT(!subset.isEmpty());
const bool supported = codec->getValidSubset(&subset);
REPORTER_ASSERT(r, supported == supportsSubsetDecoding);
SkImageInfo subsetInfo = info.makeWH(subset.width(), subset.height());
SkBitmap bm;
bm.allocPixels(subsetInfo);
const auto result = codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes(), &opts);
if (supportsSubsetDecoding) {
if (expectedResult == SkCodec::kSuccess) {
REPORTER_ASSERT(r, result == expectedResult);
}
// Webp is the only codec that supports subsets, and it will have modified the subset
// to have even left/top.
REPORTER_ASSERT(r, SkIsAlign2(subset.fLeft) && SkIsAlign2(subset.fTop));
} else {
// No subsets will work.
REPORTER_ASSERT(r, result == SkCodec::kUnimplemented);
}
}
// SkAndroidCodec tests
if (supportsScanlineDecoding || supportsSubsetDecoding || supportsNewScanlineDecoding) {
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
if (!stream) {
return;
}
auto androidCodec = SkAndroidCodec::MakeFromCodec(std::move(codec));
if (!androidCodec) {
ERRORF(r, "Unable to decode '%s'", path);
return;
}
SkBitmap bm;
SkMD5::Digest androidCodecDigest;
test_codec(r, path, androidCodec.get(), bm, info, size, expectedResult, &androidCodecDigest,
&codecDigest);
}
if (!supportsIncomplete) {
// Test SkCodecImageGenerator
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
sk_sp<SkData> fullData(SkData::MakeFromStream(stream.get(), stream->getLength()));
std::unique_ptr<SkImageGenerator> gen(
SkCodecImageGenerator::MakeFromEncodedCodec(fullData));
SkBitmap bm;
bm.allocPixels(info);
REPORTER_ASSERT(r, gen->getPixels(info, bm.getPixels(), bm.rowBytes()));
compare_to_good_digest(r, codecDigest, bm);
#ifndef SK_PNG_DISABLE_TESTS
// Test using SkFrontBufferedStream, as Android does
auto bufferedStream = SkFrontBufferedStream::Make(
SkMemoryStream::Make(std::move(fullData)), SkCodec::MinBufferedBytesNeeded());
REPORTER_ASSERT(r, bufferedStream);
codec = SkCodec::MakeFromStream(std::move(bufferedStream));
REPORTER_ASSERT(r, codec);
if (codec) {
test_info(r, codec.get(), info, SkCodec::kSuccess, &codecDigest);
}
#endif
}
}
DEF_TEST(Codec_wbmp, r) {
check(r, "images/mandrill.wbmp", SkISize::Make(512, 512), true, false, true);
}
DEF_TEST(Codec_webp, r) {
check(r, "images/baby_tux.webp", SkISize::Make(386, 395), false, true, true);
check(r, "images/color_wheel.webp", SkISize::Make(128, 128), false, true, true);
check(r, "images/yellow_rose.webp", SkISize::Make(400, 301), false, true, true);
}
DEF_TEST(Codec_bmp, r) {
check(r, "images/randPixels.bmp", SkISize::Make(8, 8), true, false, true);
check(r, "images/rle.bmp", SkISize::Make(320, 240), true, false, true);
}
DEF_TEST(Codec_ico, r) {
// FIXME: We are not ready to test incomplete ICOs
// These two tests examine interestingly different behavior:
// Decodes an embedded BMP image
check(r, "images/color_wheel.ico", SkISize::Make(128, 128), true, false, false);
// Decodes an embedded PNG image
check(r, "images/google_chrome.ico", SkISize::Make(256, 256), false, false, false, true);
}
DEF_TEST(Codec_gif, r) {
check(r, "images/box.gif", SkISize::Make(200, 55), false, false, true, true);
check(r, "images/color_wheel.gif", SkISize::Make(128, 128), false, false, true, true);
// randPixels.gif is too small to test incomplete
check(r, "images/randPixels.gif", SkISize::Make(8, 8), false, false, false, true);
}
DEF_TEST(Codec_jpg, r) {
check(r, "images/CMYK.jpg", SkISize::Make(642, 516), true, false, true);
check(r, "images/color_wheel.jpg", SkISize::Make(128, 128), true, false, true);
// grayscale.jpg is too small to test incomplete
check(r, "images/grayscale.jpg", SkISize::Make(128, 128), true, false, false);
check(r, "images/mandrill_512_q075.jpg", SkISize::Make(512, 512), true, false, true);
// randPixels.jpg is too small to test incomplete
check(r, "images/randPixels.jpg", SkISize::Make(8, 8), true, false, false);
}
DEF_TEST(Codec_png, r) {
check(r, "images/arrow.png", SkISize::Make(187, 312), false, false, true, true);
check(r, "images/baby_tux.png", SkISize::Make(240, 246), false, false, true, true);
check(r, "images/color_wheel.png", SkISize::Make(128, 128), false, false, true, true);
// half-transparent-white-pixel.png is too small to test incomplete
check(r, "images/half-transparent-white-pixel.png", SkISize::Make(1, 1), false, false, false, true);
check(r, "images/mandrill_128.png", SkISize::Make(128, 128), false, false, true, true);
// mandrill_16.png is too small (relative to embedded sRGB profile) to test incomplete
check(r, "images/mandrill_16.png", SkISize::Make(16, 16), false, false, false, true);
check(r, "images/mandrill_256.png", SkISize::Make(256, 256), false, false, true, true);
check(r, "images/mandrill_32.png", SkISize::Make(32, 32), false, false, true, true);
check(r, "images/mandrill_512.png", SkISize::Make(512, 512), false, false, true, true);
check(r, "images/mandrill_64.png", SkISize::Make(64, 64), false, false, true, true);
check(r, "images/plane.png", SkISize::Make(250, 126), false, false, true, true);
check(r, "images/plane_interlaced.png", SkISize::Make(250, 126), false, false, true, true);
check(r, "images/randPixels.png", SkISize::Make(8, 8), false, false, true, true);
check(r, "images/yellow_rose.png", SkISize::Make(400, 301), false, false, true, true);
}
// Disable RAW tests for Win32.
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
DEF_TEST(Codec_raw, r) {
check(r, "images/sample_1mp.dng", SkISize::Make(600, 338), false, false, false);
check(r, "images/sample_1mp_rotated.dng", SkISize::Make(600, 338), false, false, false);
check(r, "images/dng_with_preview.dng", SkISize::Make(600, 338), true, false, false);
}
#endif
static void test_invalid_stream(skiatest::Reporter* r, const void* stream, size_t len) {
// Neither of these calls should return a codec. Bots should catch us if we leaked anything.
REPORTER_ASSERT(r, !SkCodec::MakeFromStream(
skstd::make_unique<SkMemoryStream>(stream, len, false)));
REPORTER_ASSERT(r, !SkAndroidCodec::MakeFromStream(
skstd::make_unique<SkMemoryStream>(stream, len, false)));
}
// Ensure that SkCodec::NewFromStream handles freeing the passed in SkStream,
// even on failure. Test some bad streams.
DEF_TEST(Codec_leaks, r) {
// No codec should claim this as their format, so this tests SkCodec::NewFromStream.
const char nonSupportedStream[] = "hello world";
// The other strings should look like the beginning of a file type, so we'll call some
// internal version of NewFromStream, which must also delete the stream on failure.
const unsigned char emptyPng[] = { 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a };
const unsigned char emptyJpeg[] = { 0xFF, 0xD8, 0xFF };
const char emptyWebp[] = "RIFF1234WEBPVP";
const char emptyBmp[] = { 'B', 'M' };
const char emptyIco[] = { '\x00', '\x00', '\x01', '\x00' };
const char emptyGif[] = "GIFVER";
test_invalid_stream(r, nonSupportedStream, sizeof(nonSupportedStream));
test_invalid_stream(r, emptyPng, sizeof(emptyPng));
test_invalid_stream(r, emptyJpeg, sizeof(emptyJpeg));
test_invalid_stream(r, emptyWebp, sizeof(emptyWebp));
test_invalid_stream(r, emptyBmp, sizeof(emptyBmp));
test_invalid_stream(r, emptyIco, sizeof(emptyIco));
test_invalid_stream(r, emptyGif, sizeof(emptyGif));
}
DEF_TEST(Codec_null, r) {
// Attempting to create an SkCodec or an SkAndroidCodec with null should not
// crash.
REPORTER_ASSERT(r, !SkCodec::MakeFromStream(nullptr));
REPORTER_ASSERT(r, !SkAndroidCodec::MakeFromStream(nullptr));
}
static void test_dimensions(skiatest::Reporter* r, const char path[]) {
// Create the codec from the resource file
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
if (!stream) {
return;
}
std::unique_ptr<SkAndroidCodec> codec(SkAndroidCodec::MakeFromStream(std::move(stream)));
if (!codec) {
ERRORF(r, "Unable to create codec '%s'", path);
return;
}
// Check that the decode is successful for a variety of scales
for (int sampleSize = 1; sampleSize < 32; sampleSize++) {
// Scale the output dimensions
SkISize scaledDims = codec->getSampledDimensions(sampleSize);
SkImageInfo scaledInfo = codec->getInfo()
.makeWH(scaledDims.width(), scaledDims.height())
.makeColorType(kN32_SkColorType);
// Set up for the decode
size_t rowBytes = scaledDims.width() * sizeof(SkPMColor);
size_t totalBytes = scaledInfo.computeByteSize(rowBytes);
SkAutoTMalloc<SkPMColor> pixels(totalBytes);
SkAndroidCodec::AndroidOptions options;
options.fSampleSize = sampleSize;
SkCodec::Result result =
codec->getAndroidPixels(scaledInfo, pixels.get(), rowBytes, &options);
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
}
}
// Ensure that onGetScaledDimensions returns valid image dimensions to use for decodes
DEF_TEST(Codec_Dimensions, r) {
// JPG
test_dimensions(r, "images/CMYK.jpg");
test_dimensions(r, "images/color_wheel.jpg");
test_dimensions(r, "images/grayscale.jpg");
test_dimensions(r, "images/mandrill_512_q075.jpg");
test_dimensions(r, "images/randPixels.jpg");
// Decoding small images with very large scaling factors is a potential
// source of bugs and crashes. We disable these tests in Gold because
// tiny images are not very useful to look at.
// Here we make sure that we do not crash or access illegal memory when
// performing scaled decodes on small images.
test_dimensions(r, "images/1x1.png");
test_dimensions(r, "images/2x2.png");
test_dimensions(r, "images/3x3.png");
test_dimensions(r, "images/3x1.png");
test_dimensions(r, "images/1x1.png");
test_dimensions(r, "images/16x1.png");
test_dimensions(r, "images/1x16.png");
test_dimensions(r, "images/mandrill_16.png");
// RAW
// Disable RAW tests for Win32.
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
test_dimensions(r, "images/sample_1mp.dng");
test_dimensions(r, "images/sample_1mp_rotated.dng");
test_dimensions(r, "images/dng_with_preview.dng");
#endif
}
static void test_invalid(skiatest::Reporter* r, const char path[]) {
auto data = GetResourceAsData(path);
if (!data) {
ERRORF(r, "Failed to get resource %s", path);
return;
}
REPORTER_ASSERT(r, !SkCodec::MakeFromData(data));
}
DEF_TEST(Codec_Empty, r) {
if (GetResourcePath().isEmpty()) {
return;
}
// Test images that should not be able to create a codec
test_invalid(r, "empty_images/zero-dims.gif");
test_invalid(r, "empty_images/zero-embedded.ico");
test_invalid(r, "empty_images/zero-width.bmp");
test_invalid(r, "empty_images/zero-height.bmp");
test_invalid(r, "empty_images/zero-width.jpg");
test_invalid(r, "empty_images/zero-height.jpg");
test_invalid(r, "empty_images/zero-width.png");
test_invalid(r, "empty_images/zero-height.png");
test_invalid(r, "empty_images/zero-width.wbmp");
test_invalid(r, "empty_images/zero-height.wbmp");
// This image is an ico with an embedded mask-bmp. This is illegal.
test_invalid(r, "invalid_images/mask-bmp-ico.ico");
// It is illegal for a webp frame to not be fully contained by the canvas.
test_invalid(r, "invalid_images/invalid-offset.webp");
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
test_invalid(r, "empty_images/zero_height.tiff");
#endif
test_invalid(r, "invalid_images/b37623797.ico");
test_invalid(r, "invalid_images/osfuzz6295.webp");
test_invalid(r, "invalid_images/osfuzz6288.bmp");
test_invalid(r, "invalid_images/ossfuzz6347");
}
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#ifndef SK_PNG_DISABLE_TESTS // reading chunks does not work properly with older versions.
// It does not appear that anyone in Google3 is reading chunks.
static void codex_test_write_fn(png_structp png_ptr, png_bytep data, png_size_t len) {
SkWStream* sk_stream = (SkWStream*)png_get_io_ptr(png_ptr);
if (!sk_stream->write(data, len)) {
png_error(png_ptr, "sk_write_fn Error!");
}
}
DEF_TEST(Codec_pngChunkReader, r) {
// Create a dummy bitmap. Use unpremul RGBA for libpng.
SkBitmap bm;
const int w = 1;
const int h = 1;
const SkImageInfo bmInfo = SkImageInfo::Make(w, h, kRGBA_8888_SkColorType,
kUnpremul_SkAlphaType);
bm.setInfo(bmInfo);
bm.allocPixels();
bm.eraseColor(SK_ColorBLUE);
SkMD5::Digest goodDigest;
md5(bm, &goodDigest);
// Write to a png file.
png_structp png = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
REPORTER_ASSERT(r, png);
if (!png) {
return;
}
png_infop info = png_create_info_struct(png);
REPORTER_ASSERT(r, info);
if (!info) {
png_destroy_write_struct(&png, nullptr);
return;
}
if (setjmp(png_jmpbuf(png))) {
ERRORF(r, "failed writing png");
png_destroy_write_struct(&png, &info);
return;
}
SkDynamicMemoryWStream wStream;
png_set_write_fn(png, (void*) (&wStream), codex_test_write_fn, nullptr);
png_set_IHDR(png, info, (png_uint_32)w, (png_uint_32)h, 8,
PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
// Create some chunks that match the Android framework's use.
static png_unknown_chunk gUnknowns[] = {
{ "npOl", (png_byte*)"outline", sizeof("outline"), PNG_HAVE_IHDR },
{ "npLb", (png_byte*)"layoutBounds", sizeof("layoutBounds"), PNG_HAVE_IHDR },
{ "npTc", (png_byte*)"ninePatchData", sizeof("ninePatchData"), PNG_HAVE_IHDR },
};
png_set_keep_unknown_chunks(png, PNG_HANDLE_CHUNK_ALWAYS, (png_byte*)"npOl\0npLb\0npTc\0", 3);
png_set_unknown_chunks(png, info, gUnknowns, SK_ARRAY_COUNT(gUnknowns));
#if PNG_LIBPNG_VER < 10600
/* Deal with unknown chunk location bug in 1.5.x and earlier */
png_set_unknown_chunk_location(png, info, 0, PNG_HAVE_IHDR);
png_set_unknown_chunk_location(png, info, 1, PNG_HAVE_IHDR);
#endif
png_write_info(png, info);
for (int j = 0; j < h; j++) {
png_bytep row = (png_bytep)(bm.getAddr(0, j));
png_write_rows(png, &row, 1);
}
png_write_end(png, info);
png_destroy_write_struct(&png, &info);
class ChunkReader : public SkPngChunkReader {
public:
ChunkReader(skiatest::Reporter* r)
: fReporter(r)
{
this->reset();
}
bool readChunk(const char tag[], const void* data, size_t length) override {
for (size_t i = 0; i < SK_ARRAY_COUNT(gUnknowns); ++i) {
if (!strcmp(tag, (const char*) gUnknowns[i].name)) {
// Tag matches. This should have been the first time we see it.
REPORTER_ASSERT(fReporter, !fSeen[i]);
fSeen[i] = true;
// Data and length should match
REPORTER_ASSERT(fReporter, length == gUnknowns[i].size);
REPORTER_ASSERT(fReporter, !strcmp((const char*) data,
(const char*) gUnknowns[i].data));
return true;
}
}
ERRORF(fReporter, "Saw an unexpected unknown chunk.");
return true;
}
bool allHaveBeenSeen() {
bool ret = true;
for (auto seen : fSeen) {
ret &= seen;
}
return ret;
}
void reset() {
sk_bzero(fSeen, sizeof(fSeen));
}
private:
skiatest::Reporter* fReporter; // Unowned
bool fSeen[3];
};
ChunkReader chunkReader(r);
// Now read the file with SkCodec.
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(wStream.detachAsData(), &chunkReader));
REPORTER_ASSERT(r, codec);
if (!codec) {
return;
}
// Now compare to the original.
SkBitmap decodedBm;
decodedBm.setInfo(codec->getInfo());
decodedBm.allocPixels();
SkCodec::Result result = codec->getPixels(codec->getInfo(), decodedBm.getPixels(),
decodedBm.rowBytes());
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
if (decodedBm.colorType() != bm.colorType()) {
SkBitmap tmp;
bool success = sk_tool_utils::copy_to(&tmp, bm.colorType(), decodedBm);
REPORTER_ASSERT(r, success);
if (!success) {
return;
}
tmp.swap(decodedBm);
}
compare_to_good_digest(r, goodDigest, decodedBm);
REPORTER_ASSERT(r, chunkReader.allHaveBeenSeen());
// Decoding again will read the chunks again.
chunkReader.reset();
REPORTER_ASSERT(r, !chunkReader.allHaveBeenSeen());
result = codec->getPixels(codec->getInfo(), decodedBm.getPixels(), decodedBm.rowBytes());
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
REPORTER_ASSERT(r, chunkReader.allHaveBeenSeen());
}
#endif // SK_PNG_DISABLE_TESTS
#endif // PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
// Stream that can only peek up to a limit
class LimitedPeekingMemStream : public SkStream {
public:
LimitedPeekingMemStream(sk_sp<SkData> data, size_t limit)
: fStream(std::move(data))
, fLimit(limit) {}
size_t peek(void* buf, size_t bytes) const override {
return fStream.peek(buf, SkTMin(bytes, fLimit));
}
size_t read(void* buf, size_t bytes) override {
return fStream.read(buf, bytes);
}
bool rewind() override {
return fStream.rewind();
}
bool isAtEnd() const override {
return fStream.isAtEnd();
}
private:
SkMemoryStream fStream;
const size_t fLimit;
};
// Disable RAW tests for Win32.
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
// Test that the RawCodec works also for not asset stream. This will test the code path using
// SkRawBufferedStream instead of SkRawAssetStream.
DEF_TEST(Codec_raw_notseekable, r) {
constexpr char path[] = "images/dng_with_preview.dng";
sk_sp<SkData> data(GetResourceAsData(path));
if (!data) {
SkDebugf("Missing resource '%s'\n", path);
return;
}
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(
skstd::make_unique<NotAssetMemStream>(std::move(data))));
REPORTER_ASSERT(r, codec);
test_info(r, codec.get(), codec->getInfo(), SkCodec::kSuccess, nullptr);
}
#endif
// Test that even if webp_parse_header fails to peek enough, it will fall back to read()
// + rewind() and succeed.
DEF_TEST(Codec_webp_peek, r) {
constexpr char path[] = "images/baby_tux.webp";
auto data = GetResourceAsData(path);
if (!data) {
SkDebugf("Missing resource '%s'\n", path);
return;
}
// The limit is less than webp needs to peek or read.
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(
skstd::make_unique<LimitedPeekingMemStream>(data, 25)));
REPORTER_ASSERT(r, codec);
test_info(r, codec.get(), codec->getInfo(), SkCodec::kSuccess, nullptr);
// Similarly, a stream which does not peek should still succeed.
codec = SkCodec::MakeFromStream(skstd::make_unique<LimitedPeekingMemStream>(data, 0));
REPORTER_ASSERT(r, codec);
test_info(r, codec.get(), codec->getInfo(), SkCodec::kSuccess, nullptr);
}
// SkCodec's wbmp decoder was initially unnecessarily restrictive.
// It required the second byte to be zero. The wbmp specification allows
// a couple of bits to be 1 (so long as they do not overlap with 0x9F).
// Test that SkCodec now supports an image with these bits set.
DEF_TEST(Codec_wbmp_restrictive, r) {
const char* path = "images/mandrill.wbmp";
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
if (!stream) {
return;
}
// Modify the stream to contain a second byte with some bits set.
auto data = SkCopyStreamToData(stream.get());
uint8_t* writeableData = static_cast<uint8_t*>(data->writable_data());
writeableData[1] = static_cast<uint8_t>(~0x9F);
// SkCodec should support this.
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(data));
REPORTER_ASSERT(r, codec);
if (!codec) {
return;
}
test_info(r, codec.get(), codec->getInfo(), SkCodec::kSuccess, nullptr);
}
// wbmp images have a header that can be arbitrarily large, depending on the
// size of the image. We cap the size at 65535, meaning we only need to look at
// 8 bytes to determine whether we can read the image. This is important
// because SkCodec only passes a limited number of bytes to SkWbmpCodec to
// determine whether the image is a wbmp.
DEF_TEST(Codec_wbmp_max_size, r) {
const unsigned char maxSizeWbmp[] = { 0x00, 0x00, // Header
0x83, 0xFF, 0x7F, // W: 65535
0x83, 0xFF, 0x7F }; // H: 65535
std::unique_ptr<SkStream> stream(new SkMemoryStream(maxSizeWbmp, sizeof(maxSizeWbmp), false));
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(stream)));
REPORTER_ASSERT(r, codec);
if (!codec) return;
REPORTER_ASSERT(r, codec->getInfo().width() == 65535);
REPORTER_ASSERT(r, codec->getInfo().height() == 65535);
// Now test an image which is too big. Any image with a larger header (i.e.
// has bigger width/height) is also too big.
const unsigned char tooBigWbmp[] = { 0x00, 0x00, // Header
0x84, 0x80, 0x00, // W: 65536
0x84, 0x80, 0x00 }; // H: 65536
stream.reset(new SkMemoryStream(tooBigWbmp, sizeof(tooBigWbmp), false));
codec = SkCodec::MakeFromStream(std::move(stream));
REPORTER_ASSERT(r, !codec);
}
DEF_TEST(Codec_jpeg_rewind, r) {
const char* path = "images/mandrill_512_q075.jpg";
sk_sp<SkData> data(GetResourceAsData(path));
if (!data) {
return;
}
data = SkData::MakeSubset(data.get(), 0, data->size() / 2);
std::unique_ptr<SkAndroidCodec> codec(SkAndroidCodec::MakeFromData(data));
if (!codec) {
ERRORF(r, "Unable to create codec '%s'.", path);
return;
}
const int width = codec->getInfo().width();
const int height = codec->getInfo().height();
size_t rowBytes = sizeof(SkPMColor) * width;
SkAutoMalloc pixelStorage(height * rowBytes);
// Perform a sampled decode.
SkAndroidCodec::AndroidOptions opts;
opts.fSampleSize = 12;
auto sampledInfo = codec->getInfo().makeWH(width / 12, height / 12);
auto result = codec->getAndroidPixels(sampledInfo, pixelStorage.get(), rowBytes, &opts);
REPORTER_ASSERT(r, SkCodec::kIncompleteInput == result);
// Rewind the codec and perform a full image decode.
result = codec->getPixels(codec->getInfo(), pixelStorage.get(), rowBytes);
REPORTER_ASSERT(r, SkCodec::kIncompleteInput == result);
// Now perform a subset decode.
{
opts.fSampleSize = 1;
SkIRect subset = SkIRect::MakeWH(100, 100);
opts.fSubset = ⊂
result = codec->getAndroidPixels(codec->getInfo().makeWH(100, 100), pixelStorage.get(),
rowBytes, &opts);
// Though we only have half the data, it is enough to decode this subset.
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
}
// Perform another full image decode. ASAN will detect if we look at the subset when it is
// out of scope. This would happen if we depend on the old state in the codec.
// This tests two layers of bugs: both SkJpegCodec::readRows and SkCodec::fillIncompleteImage
// used to look at the old subset.
opts.fSubset = nullptr;
result = codec->getAndroidPixels(codec->getInfo(), pixelStorage.get(), rowBytes, &opts);
REPORTER_ASSERT(r, SkCodec::kIncompleteInput == result);
}
static void check_color_xform(skiatest::Reporter* r, const char* path) {
std::unique_ptr<SkAndroidCodec> codec(SkAndroidCodec::MakeFromStream(GetResourceAsStream(path)));
SkAndroidCodec::AndroidOptions opts;
opts.fSampleSize = 3;
const int subsetWidth = codec->getInfo().width() / 2;
const int subsetHeight = codec->getInfo().height() / 2;
SkIRect subset = SkIRect::MakeWH(subsetWidth, subsetHeight);
opts.fSubset = ⊂
const int dstWidth = subsetWidth / opts.fSampleSize;
const int dstHeight = subsetHeight / opts.fSampleSize;
auto colorSpace = SkColorSpace::MakeRGB(SkNamedTransferFn::k2Dot2, SkNamedGamut::kAdobeRGB);
SkImageInfo dstInfo = codec->getInfo().makeWH(dstWidth, dstHeight)
.makeColorType(kN32_SkColorType)
.makeColorSpace(colorSpace);
size_t rowBytes = dstInfo.minRowBytes();
SkAutoMalloc pixelStorage(dstInfo.computeByteSize(rowBytes));
SkCodec::Result result = codec->getAndroidPixels(dstInfo, pixelStorage.get(), rowBytes, &opts);
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
}
DEF_TEST(Codec_ColorXform, r) {
check_color_xform(r, "images/mandrill_512_q075.jpg");
check_color_xform(r, "images/mandrill_512.png");
}
static bool color_type_match(SkColorType origColorType, SkColorType codecColorType) {
switch (origColorType) {
case kRGBA_8888_SkColorType:
case kBGRA_8888_SkColorType:
return kRGBA_8888_SkColorType == codecColorType ||
kBGRA_8888_SkColorType == codecColorType;
default:
return origColorType == codecColorType;
}
}
static bool alpha_type_match(SkAlphaType origAlphaType, SkAlphaType codecAlphaType) {
switch (origAlphaType) {
case kUnpremul_SkAlphaType:
case kPremul_SkAlphaType:
return kUnpremul_SkAlphaType == codecAlphaType ||
kPremul_SkAlphaType == codecAlphaType;
default:
return origAlphaType == codecAlphaType;
}
}
static void check_round_trip(skiatest::Reporter* r, SkCodec* origCodec, const SkImageInfo& info) {
SkBitmap bm1;
bm1.allocPixels(info);
SkCodec::Result result = origCodec->getPixels(info, bm1.getPixels(), bm1.rowBytes());
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
// Encode the image to png.
auto data = SkEncodeBitmap(bm1, SkEncodedImageFormat::kPNG, 100);
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(data));
REPORTER_ASSERT(r, color_type_match(info.colorType(), codec->getInfo().colorType()));
REPORTER_ASSERT(r, alpha_type_match(info.alphaType(), codec->getInfo().alphaType()));
SkBitmap bm2;
bm2.allocPixels(info);
result = codec->getPixels(info, bm2.getPixels(), bm2.rowBytes());
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
SkMD5::Digest d1, d2;
md5(bm1, &d1);
md5(bm2, &d2);
REPORTER_ASSERT(r, d1 == d2);
}
DEF_TEST(Codec_PngRoundTrip, r) {
auto codec = SkCodec::MakeFromStream(GetResourceAsStream("images/mandrill_512_q075.jpg"));
SkColorType colorTypesOpaque[] = {
kRGB_565_SkColorType, kRGBA_8888_SkColorType, kBGRA_8888_SkColorType
};
for (SkColorType colorType : colorTypesOpaque) {
SkImageInfo newInfo = codec->getInfo().makeColorType(colorType);
check_round_trip(r, codec.get(), newInfo);
}
codec = SkCodec::MakeFromStream(GetResourceAsStream("images/grayscale.jpg"));
check_round_trip(r, codec.get(), codec->getInfo());
codec = SkCodec::MakeFromStream(GetResourceAsStream("images/yellow_rose.png"));
SkColorType colorTypesWithAlpha[] = {
kRGBA_8888_SkColorType, kBGRA_8888_SkColorType
};
SkAlphaType alphaTypes[] = {
kUnpremul_SkAlphaType, kPremul_SkAlphaType
};
for (SkColorType colorType : colorTypesWithAlpha) {
for (SkAlphaType alphaType : alphaTypes) {
// Set color space to nullptr because color correct premultiplies do not round trip.
SkImageInfo newInfo = codec->getInfo().makeColorType(colorType)
.makeAlphaType(alphaType)
.makeColorSpace(nullptr);
check_round_trip(r, codec.get(), newInfo);
}
}
codec = SkCodec::MakeFromStream(GetResourceAsStream("images/index8.png"));
for (SkAlphaType alphaType : alphaTypes) {
SkImageInfo newInfo = codec->getInfo().makeAlphaType(alphaType)
.makeColorSpace(nullptr);
check_round_trip(r, codec.get(), newInfo);
}
}
static void test_conversion_possible(skiatest::Reporter* r, const char* path,
bool supportsScanlineDecoder,
bool supportsIncrementalDecoder) {
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
if (!stream) {
return;
}
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(stream)));
if (!codec) {
ERRORF(r, "failed to create a codec for %s", path);
return;
}
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::kSuccess == result);
result = codec->startScanlineDecode(infoF16);
if (supportsScanlineDecoder) {
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
} else {
REPORTER_ASSERT(r, SkCodec::kUnimplemented == result
|| SkCodec::kSuccess == result);
}
result = codec->startIncrementalDecode(infoF16, bm.getPixels(), bm.rowBytes());
if (supportsIncrementalDecoder) {
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
} else {
REPORTER_ASSERT(r, SkCodec::kUnimplemented == result
|| SkCodec::kSuccess == result);
}
infoF16 = infoF16.makeColorSpace(infoF16.colorSpace()->makeLinearGamma());
result = codec->getPixels(infoF16, bm.getPixels(), bm.rowBytes());
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
result = codec->startScanlineDecode(infoF16);
if (supportsScanlineDecoder) {
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
} else {
REPORTER_ASSERT(r, SkCodec::kUnimplemented == result);
}
result = codec->startIncrementalDecode(infoF16, bm.getPixels(), bm.rowBytes());
if (supportsIncrementalDecoder) {
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
} else {
REPORTER_ASSERT(r, SkCodec::kUnimplemented == result);
}
}
DEF_TEST(Codec_F16ConversionPossible, r) {
test_conversion_possible(r, "images/color_wheel.webp", false, false);
test_conversion_possible(r, "images/mandrill_512_q075.jpg", true, false);
test_conversion_possible(r, "images/yellow_rose.png", false, true);
}
static void decode_frame(skiatest::Reporter* r, SkCodec* codec, size_t frame) {
SkBitmap bm;
auto info = codec->getInfo().makeColorType(kN32_SkColorType);
bm.allocPixels(info);
SkCodec::Options opts;
opts.fFrameIndex = frame;
REPORTER_ASSERT(r, SkCodec::kSuccess == codec->getPixels(info,
bm.getPixels(), bm.rowBytes(), &opts));
}
// For an animated GIF, we should only read enough to decode frame 0 if the
// client never calls getFrameInfo and only decodes frame 0.
DEF_TEST(Codec_skipFullParse, r) {
auto path = "images/test640x479.gif";
auto streamObj = GetResourceAsStream(path);
if (!streamObj) {
return;
}
SkStream* stream = streamObj.get();
// Note that we cheat and hold on to the stream pointer, but SkCodec will
// take ownership. We will not refer to the stream after the SkCodec
// deletes it.
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(streamObj)));
if (!codec) {
ERRORF(r, "Failed to create codec for %s", path);
return;
}
REPORTER_ASSERT(r, stream->hasPosition());
const size_t sizePosition = stream->getPosition();
REPORTER_ASSERT(r, stream->hasLength() && sizePosition < stream->getLength());
// This should read more of the stream, but not the whole stream.
decode_frame(r, codec.get(), 0);
const size_t positionAfterFirstFrame = stream->getPosition();
REPORTER_ASSERT(r, positionAfterFirstFrame > sizePosition
&& positionAfterFirstFrame < stream->getLength());
// There is more data in the stream.
auto frameInfo = codec->getFrameInfo();
REPORTER_ASSERT(r, frameInfo.size() == 4);
REPORTER_ASSERT(r, stream->getPosition() > positionAfterFirstFrame);
}
// Only rewinds up to a limit.
class LimitedRewindingStream : public SkStream {
public:
static std::unique_ptr<SkStream> Make(const char path[], size_t limit) {
auto stream = GetResourceAsStream(path);
if (!stream) {
return nullptr;
}
return std::unique_ptr<SkStream>(new LimitedRewindingStream(std::move(stream), limit));
}
size_t read(void* buffer, size_t size) override {
const size_t bytes = fStream->read(buffer, size);
fPosition += bytes;
return bytes;
}
bool isAtEnd() const override {
return fStream->isAtEnd();
}
bool rewind() override {
if (fPosition <= fLimit && fStream->rewind()) {
fPosition = 0;
return true;
}
return false;
}
private:
std::unique_ptr<SkStream> fStream;
const size_t fLimit;
size_t fPosition;
LimitedRewindingStream(std::unique_ptr<SkStream> stream, size_t limit)
: fStream(std::move(stream))
, fLimit(limit)
, fPosition(0)
{
SkASSERT(fStream);
}
};
DEF_TEST(Codec_fallBack, r) {
// SkAndroidCodec needs to be able to fall back to scanline decoding
// if incremental decoding does not work. Make sure this does not
// require a rewind.
// Formats that currently do not support incremental decoding
auto files = {
"images/CMYK.jpg",
"images/color_wheel.ico",
"images/mandrill.wbmp",
"images/randPixels.bmp",
};
for (auto file : files) {
auto stream = LimitedRewindingStream::Make(file, SkCodec::MinBufferedBytesNeeded());
if (!stream) {
SkDebugf("Missing resources (%s). Set --resourcePath.\n", file);
return;
}
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(stream)));
if (!codec) {
ERRORF(r, "Failed to create codec for %s,", file);
continue;
}
SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
SkBitmap bm;
bm.allocPixels(info);
if (SkCodec::kUnimplemented != codec->startIncrementalDecode(info, bm.getPixels(),
bm.rowBytes())) {
ERRORF(r, "Is scanline decoding now implemented for %s?", file);
continue;
}
// Scanline decoding should not require a rewind.
SkCodec::Result result = codec->startScanlineDecode(info);
if (SkCodec::kSuccess != result) {
ERRORF(r, "Scanline decoding failed for %s with %i", file, result);
}
}
}
// This test verifies that we fixed an assert statement that fired when reusing a png codec
// after scaling.
DEF_TEST(Codec_reusePng, r) {
std::unique_ptr<SkStream> stream(GetResourceAsStream("images/plane.png"));
if (!stream) {
return;
}
std::unique_ptr<SkAndroidCodec> codec(SkAndroidCodec::MakeFromStream(std::move(stream)));
if (!codec) {
ERRORF(r, "Failed to create codec\n");
return;
}
SkAndroidCodec::AndroidOptions opts;
opts.fSampleSize = 5;
auto size = codec->getSampledDimensions(opts.fSampleSize);
auto info = codec->getInfo().makeWH(size.fWidth, size.fHeight).makeColorType(kN32_SkColorType);
SkBitmap bm;
bm.allocPixels(info);
auto result = codec->getAndroidPixels(info, bm.getPixels(), bm.rowBytes(), &opts);
REPORTER_ASSERT(r, result == SkCodec::kSuccess);
info = codec->getInfo().makeColorType(kN32_SkColorType);
bm.allocPixels(info);
opts.fSampleSize = 1;
result = codec->getAndroidPixels(info, bm.getPixels(), bm.rowBytes(), &opts);
REPORTER_ASSERT(r, result == SkCodec::kSuccess);
}
DEF_TEST(Codec_rowsDecoded, r) {
auto file = "images/plane_interlaced.png";
std::unique_ptr<SkStream> stream(GetResourceAsStream(file));
if (!stream) {
return;
}
// This is enough to read the header etc, but no rows.
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(SkData::MakeFromStream(stream.get(), 99)));
if (!codec) {
ERRORF(r, "Failed to create codec\n");
return;
}
auto info = codec->getInfo().makeColorType(kN32_SkColorType);
SkBitmap bm;
bm.allocPixels(info);
auto result = codec->startIncrementalDecode(info, bm.getPixels(), bm.rowBytes());
REPORTER_ASSERT(r, result == SkCodec::kSuccess);
// This is an arbitrary value. The important fact is that it is not zero, and rowsDecoded
// should get set to zero by incrementalDecode.
int rowsDecoded = 77;
result = codec->incrementalDecode(&rowsDecoded);
REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
REPORTER_ASSERT(r, rowsDecoded == 0);
}
static void test_invalid_images(skiatest::Reporter* r, const char* path,
SkCodec::Result expectedResult) {
auto stream = GetResourceAsStream(path);
if (!stream) {
return;
}
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(stream)));
REPORTER_ASSERT(r, codec);
test_info(r, codec.get(), codec->getInfo().makeColorType(kN32_SkColorType), expectedResult,
nullptr);
}
DEF_TEST(Codec_InvalidImages, r) {
// ASAN will complain if there is an issue.
test_invalid_images(r, "invalid_images/skbug5887.gif", SkCodec::kErrorInInput);
test_invalid_images(r, "invalid_images/many-progressive-scans.jpg", SkCodec::kInvalidInput);
test_invalid_images(r, "invalid_images/b33251605.bmp", SkCodec::kIncompleteInput);
test_invalid_images(r, "invalid_images/bad_palette.png", SkCodec::kInvalidInput);
}
static void test_invalid_header(skiatest::Reporter* r, const char* path) {
auto data = GetResourceAsData(path);
if (!data) {
return;
}
std::unique_ptr<SkStreamAsset> stream(new SkMemoryStream(std::move(data)));
if (!stream) {
return;
}
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(stream)));
REPORTER_ASSERT(r, !codec);
}
DEF_TEST(Codec_InvalidHeader, r) {
test_invalid_header(r, "invalid_images/int_overflow.ico");
// These files report values that have caused problems with SkFILEStreams.
// They are invalid, and should not create SkCodecs.
test_invalid_header(r, "invalid_images/b33651913.bmp");
test_invalid_header(r, "invalid_images/b34778578.bmp");
}
/*
For the Codec_InvalidAnimated test, immediately below,
resources/invalid_images/skbug6046.gif is:
00000000: 4749 4638 3961 2000 0000 0000 002c ff00 GIF89a ......,..
00000010: 7400 0600 0000 4001 0021 f904 0a00 0000 t.....@..!......
00000020: 002c ff00 0000 ff00 7400 0606 0606 0601 .,......t.......
00000030: 0021 f904 0000 0000 002c ff00 0000 ffcc .!.......,......
00000040: 1b36 5266 deba 543d .6Rf..T=
It nominally contains 3 frames, but all of them are invalid. It came from a
fuzzer doing random mutations and copies. The breakdown:
@000 6 bytes magic "GIF89a"
@006 7 bytes Logical Screen Descriptor: 0x20 0x00 ... 0x00
- width = 32
- height = 0
- flags = 0x00
- background color index, pixel aspect ratio bytes ignored
@00D 10 bytes Image Descriptor header: 0x2C 0xFF ... 0x40
- origin_x = 255
- origin_y = 116
- width = 6
- height = 0
- flags = 0x40, interlaced
@017 2 bytes Image Descriptor body (pixel data): 0x01 0x00
- lit_width = 1, INVALID, OUTSIDE THE RANGE [2, 8]
- 0x00 byte means "end of data" for this frame
@019 8 bytes Graphic Control Extension: 0x21 0xF9 ... 0x00
- valid, but irrelevant here.
@021 10 bytes Image Descriptor header: 0x2C 0xFF ... 0x06
- origin_x = 255
- origin_y = 0
- width = 255
- height = 116
- flags = 0x06, INVALID, 0x80 BIT ZERO IMPLIES 0x07 BITS SHOULD BE ZERO
@02B 14 bytes Image Descriptor body (pixel data): 0x06 0x06 ... 0x00
- lit_width = 6
- 0x06 precedes a 6 byte block of data
- 0x04 precedes a 4 byte block of data
- 0x00 byte means "end of data" for this frame
@039 10 bytes Image Descriptor header: 0x2C 0xFF ... 0x06
- origin_x = 255
- origin_y = 0
- width = 52479
- height = 13851
- flags = 0x52, INVALID, 0x80 BIT ZERO IMPLIES 0x07 BITS SHOULD BE ZERO
@043 5 bytes Image Descriptor body (pixel data): 0x66 0xDE ... unexpected-EOF
- lit_width = 102, INVALID, OUTSIDE THE RANGE [2, 8]
- 0xDE precedes a 222 byte block of data, INVALIDLY TRUNCATED
On Image Descriptor flags INVALIDITY,
https://www.w3.org/Graphics/GIF/spec-gif89a.txt section 20.c says that "Size of
Local Color Table [the low 3 bits]... should be 0 if there is no Local Color
Table specified [the high bit]."
On LZW literal width (also known as Minimum Code Size) INVALIDITY outside of
the range [2, 8], https://www.w3.org/Graphics/GIF/spec-gif89a.txt Appendix F
says that "Normally this will be the same as the number of [palette index]
bits. Because of some algorithmic constraints however, black & white images
which have one color bit must be indicated as having a code size of 2."
In practice, some GIF decoders, including the old third_party/gif code, don't
enforce this. It says: "currentFrame->setDataSize(this->getOneByte())" with the
only further check being against an upper bound of SK_MAX_DICTIONARY_ENTRY_BITS
(the constant 12).
*/
DEF_TEST(Codec_InvalidAnimated, r) {
// ASAN will complain if there is an issue.
auto path = "invalid_images/skbug6046.gif";
auto stream = GetResourceAsStream(path);
if (!stream) {
return;
}
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(stream)));
REPORTER_ASSERT(r, codec);
if (!codec) {
return;
}
const auto info = codec->getInfo().makeColorType(kN32_SkColorType);
SkBitmap bm;
bm.allocPixels(info);
auto frameInfos = codec->getFrameInfo();
SkCodec::Options opts;
for (int i = 0; static_cast<size_t>(i) < frameInfos.size(); i++) {
opts.fFrameIndex = i;
const auto reqFrame = frameInfos[i].fRequiredFrame;
opts.fPriorFrame = reqFrame == i - 1 ? reqFrame : SkCodec::kNoFrame;
auto result = codec->startIncrementalDecode(info, bm.getPixels(), bm.rowBytes(), &opts);
#ifdef SK_HAS_WUFFS_LIBRARY
// We are transitioning from an old GIF implementation to a new (Wuffs)
// GIF implementation.
//
// This test (without SK_HAS_WUFFS_LIBRARY) is overly specific to the
// old implementation. As a fuzzer-discovered test, it's likely that
// what's fundamentally being tested isn't that decoding an invalid GIF
// leads to kSuccess, but that decoding an invalid GIF doesn't lead to
// an ASAN violation.
//
// Each of the 3 frames of the source GIF image is fundamentally
// invalid, as per the "breakdown" comment above. The old
// implementation is happy to call startIncrementalDecode 3 times. The
// new implementation is happy for the first two times, but on the 3rd,
// SkCodec::startIncrementalDecode calls SkCodec::handleFrameIndex
// which calls SkCodec::getPixels on the requiredFrame (the 0'th
// frame), and the new implementation subsequently hits the
// invalid-ness and returns kErrorInInput instead of kSuccess.
//
// Once the transition is complete, we can remove the #ifdef and delete
// the rest of the test function.
if (i == 2) {
if (result != SkCodec::kErrorInInput) {
ERRORF(r, "Unexpected result for decoding frame %i (out of %i) with error %i\n", i,
frameInfos.size(), result);
}
return;
}
#endif
if (result != SkCodec::kSuccess) {
ERRORF(r, "Failed to start decoding frame %i (out of %i) with error %i\n", i,
frameInfos.size(), result);
continue;
}
codec->incrementalDecode();
}
}
static void encode_format(SkDynamicMemoryWStream* stream, const SkPixmap& pixmap,
SkEncodedImageFormat format) {
switch (format) {
case SkEncodedImageFormat::kPNG:
SkPngEncoder::Encode(stream, pixmap, SkPngEncoder::Options());
break;
case SkEncodedImageFormat::kJPEG:
SkJpegEncoder::Encode(stream, pixmap, SkJpegEncoder::Options());
break;
case SkEncodedImageFormat::kWEBP:
SkWebpEncoder::Encode(stream, pixmap, SkWebpEncoder::Options());
break;
default:
SkASSERT(false);
break;
}
}
static void test_encode_icc(skiatest::Reporter* r, SkEncodedImageFormat format) {
// Test with sRGB color space.
SkBitmap srgbBitmap;
SkImageInfo srgbInfo = SkImageInfo::MakeS32(1, 1, kOpaque_SkAlphaType);
srgbBitmap.allocPixels(srgbInfo);
*srgbBitmap.getAddr32(0, 0) = 0;
SkPixmap pixmap;
srgbBitmap.peekPixels(&pixmap);
SkDynamicMemoryWStream srgbBuf;
encode_format(&srgbBuf, pixmap, format);
sk_sp<SkData> srgbData = srgbBuf.detachAsData();
std::unique_ptr<SkCodec> srgbCodec(SkCodec::MakeFromData(srgbData));
REPORTER_ASSERT(r, srgbCodec->getInfo().colorSpace() == sk_srgb_singleton());
// Test with P3 color space.
SkDynamicMemoryWStream p3Buf;
sk_sp<SkColorSpace> p3 = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, SkNamedGamut::kDCIP3);
pixmap.setColorSpace(p3);
encode_format(&p3Buf, pixmap, format);
sk_sp<SkData> p3Data = p3Buf.detachAsData();
std::unique_ptr<SkCodec> p3Codec(SkCodec::MakeFromData(p3Data));
REPORTER_ASSERT(r, p3Codec->getInfo().colorSpace()->gammaCloseToSRGB());
skcms_Matrix3x3 mat0, mat1;
bool success = p3->toXYZD50(&mat0);
REPORTER_ASSERT(r, success);
success = p3Codec->getInfo().colorSpace()->toXYZD50(&mat1);
REPORTER_ASSERT(r, success);
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
REPORTER_ASSERT(r, color_space_almost_equal(mat0.vals[i][j], mat1.vals[i][j]));
}
}
}
DEF_TEST(Codec_EncodeICC, r) {
test_encode_icc(r, SkEncodedImageFormat::kPNG);
test_encode_icc(r, SkEncodedImageFormat::kJPEG);
test_encode_icc(r, SkEncodedImageFormat::kWEBP);
}
DEF_TEST(Codec_webp_rowsDecoded, r) {
const char* path = "images/baby_tux.webp";
sk_sp<SkData> data(GetResourceAsData(path));
if (!data) {
return;
}
// Truncate this file so that the header is available but no rows can be
// decoded. This should create a codec but fail to decode.
size_t truncatedSize = 5000;
sk_sp<SkData> subset = SkData::MakeSubset(data.get(), 0, truncatedSize);
std::unique_ptr<SkCodec> codec = SkCodec::MakeFromData(std::move(subset));
if (!codec) {
ERRORF(r, "Failed to create a codec for %s truncated to only %lu bytes",
path, truncatedSize);
return;
}
test_info(r, codec.get(), codec->getInfo(), SkCodec::kInvalidInput, nullptr);
}
/*
For the Codec_ossfuzz6274 test, immediately below,
resources/invalid_images/ossfuzz6274.gif is:
00000000: 4749 4638 3961 2000 2000 f120 2020 2020 GIF89a . ..
00000010: 2020 2020 2020 2020 2021 f903 ff20 2020 !...
00000020: 002c 0000 0000 2000 2000 2000 00 .,.... . . ..
@000 6 bytes magic "GIF89a"
@006 7 bytes Logical Screen Descriptor: 0x20 0x00 ... 0x00
- width = 32
- height = 32
- flags = 0xF1, global color table, 4 RGB entries
- background color index, pixel aspect ratio bytes ignored
@00D 12 bytes Color Table: 0x20 0x20 ... 0x20
@019 20 bytes Graphic Control Extension: 0x21 0xF9 ... unexpected-EOF
- 0x03 precedes a 3 byte block of data, INVALID, MUST BE 4
- 0x20 precedes a 32 byte block of data, INVALIDly truncated
https://www.w3.org/Graphics/GIF/spec-gif89a.txt section 23.c says that the
block size (for an 0x21 0xF9 Graphic Control Extension) must be "the fixed
value 4".
*/
DEF_TEST(Codec_ossfuzz6274, r) {
if (GetResourcePath().isEmpty()) {
return;
}
const char* file = "invalid_images/ossfuzz6274.gif";
auto image = GetResourceAsImage(file);
#ifdef SK_HAS_WUFFS_LIBRARY
// We are transitioning from an old GIF implementation to a new (Wuffs) GIF
// implementation.
//
// This test (without SK_HAS_WUFFS_LIBRARY) is overly specific to the old
// implementation. In the new implementation, the MakeFromStream factory
// method returns a nullptr SkImage*, instead of returning a non-null but
// otherwise all-transparent SkImage*.
//
// Either way, the end-to-end result is the same - the source input is
// rejected as an invalid GIF image - but the two implementations differ in
// how that's represented.
//
// Once the transition is complete, we can remove the #ifdef and delete the
// rest of the test function.
//
// See Codec_GifTruncated3 for the equivalent of the rest of the test
// function, on different (but still truncated) source data.
if (image) {
ERRORF(r, "Invalid data gave non-nullptr image");
}
return;
#endif
if (!image) {
ERRORF(r, "Missing %s", file);
return;
}
REPORTER_ASSERT(r, image->width() == 32);
REPORTER_ASSERT(r, image->height() == 32);
SkBitmap bm;
if (!bm.tryAllocPixels(SkImageInfo::MakeN32Premul(32, 32))) {
ERRORF(r, "Failed to allocate pixels");
return;
}
bm.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(bm);
canvas.drawImage(image, 0, 0, nullptr);
for (int i = 0; i < image->width(); ++i)
for (int j = 0; j < image->height(); ++j) {
SkColor actual = SkUnPreMultiply::PMColorToColor(*bm.getAddr32(i, j));
if (actual != SK_ColorTRANSPARENT) {
ERRORF(r, "did not initialize pixels! %i, %i is %x", i, j, actual);
}
}
}
DEF_TEST(Codec_78329453, r) {
if (GetResourcePath().isEmpty()) {
return;
}
const char* file = "images/b78329453.jpeg";
auto data = GetResourceAsData(file);
if (!data) {
ERRORF(r, "Missing %s", file);
return;
}
auto codec = SkAndroidCodec::MakeFromCodec(SkCodec::MakeFromData(data));
if (!codec) {
ERRORF(r, "failed to create codec from %s", file);
return;
}
// A bug in jpeg_skip_scanlines resulted in an infinite loop for this specific
// sample size on this image. Other sample sizes could have had the same result,
// but the ones tested by DM happen to not.
constexpr int kSampleSize = 19;
const auto size = codec->getSampledDimensions(kSampleSize);
auto info = codec->getInfo().makeWH(size.width(), size.height());
SkBitmap bm;
bm.allocPixels(info);
bm.eraseColor(SK_ColorTRANSPARENT);
SkAndroidCodec::AndroidOptions options;
options.fSampleSize = kSampleSize;
auto result = codec->getAndroidPixels(info, bm.getPixels(), bm.rowBytes(), &options);
if (result != SkCodec::kSuccess) {
ERRORF(r, "failed to decode with error %s", SkCodec::ResultToString(result));
}
}
DEF_TEST(Codec_A8, r) {
if (GetResourcePath().isEmpty()) {
return;
}
const char* file = "images/mandrill_cmyk.jpg";
auto data = GetResourceAsData(file);
if (!data) {
ERRORF(r, "missing %s", file);
return;
}
auto codec = SkCodec::MakeFromData(std::move(data));
auto info = codec->getInfo().makeColorType(kAlpha_8_SkColorType);
SkBitmap bm;
bm.allocPixels(info);
REPORTER_ASSERT(r, codec->getPixels(bm.pixmap()) == SkCodec::kInvalidConversion);
}
DEF_TEST(Codec_crbug807324, r) {
if (GetResourcePath().isEmpty()) {
return;
}
const char* file = "images/crbug807324.png";
auto image = GetResourceAsImage(file);
if (!image) {
ERRORF(r, "Missing %s", file);
return;
}
const int kWidth = image->width();
const int kHeight = image->height();
SkBitmap bm;
if (!bm.tryAllocPixels(SkImageInfo::MakeN32Premul(kWidth, kHeight))) {
ERRORF(r, "Could not allocate pixels (%i x %i)", kWidth, kHeight);
return;
}
bm.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(bm);
canvas.drawImage(image, 0, 0, nullptr);
for (int i = 0; i < kWidth; ++i)
for (int j = 0; j < kHeight; ++j) {
if (*bm.getAddr32(i, j) == SK_ColorTRANSPARENT) {
ERRORF(r, "image should not be transparent! %i, %i is 0", i, j);
return;
}
}
}