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skia2/tests/ImageDecodingTest.cpp

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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Resources.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkColorPriv.h"
#include "SkData.h"
#include "SkDecodingImageGenerator.h"
#include "SkDiscardableMemoryPool.h"
#include "SkForceLinking.h"
#include "SkGradientShader.h"
#include "SkImageDecoder.h"
#include "SkImageEncoder.h"
#include "SkImageGeneratorPriv.h"
#include "SkImagePriv.h"
#include "SkOSFile.h"
#include "SkPoint.h"
#include "SkShader.h"
#include "SkStream.h"
#include "SkString.h"
#include "Test.h"
__SK_FORCE_IMAGE_DECODER_LINKING;
/**
* Interprets c as an unpremultiplied color, and returns the
* premultiplied equivalent.
*/
static SkPMColor premultiply_unpmcolor(SkPMColor c) {
U8CPU a = SkGetPackedA32(c);
U8CPU r = SkGetPackedR32(c);
U8CPU g = SkGetPackedG32(c);
U8CPU b = SkGetPackedB32(c);
return SkPreMultiplyARGB(a, r, g, b);
}
/**
* Return true if this stream format should be skipped, due
* to do being an opaque format or not a valid format.
*/
static bool skip_image_format(SkImageDecoder::Format format) {
switch (format) {
case SkImageDecoder::kPNG_Format:
case SkImageDecoder::kWEBP_Format:
return false;
// Skip unknown since it will not be decoded anyway.
case SkImageDecoder::kUnknown_Format:
// Technically ICO and BMP supports alpha channels, but our image
// decoders do not, so skip them as well.
case SkImageDecoder::kICO_Format:
case SkImageDecoder::kBMP_Format:
// KTX and ASTC are texture formats so it's not particularly clear how to
// decode the alpha from them.
case SkImageDecoder::kKTX_Format:
case SkImageDecoder::kASTC_Format:
// The rest of these are opaque.
case SkImageDecoder::kPKM_Format:
case SkImageDecoder::kWBMP_Format:
case SkImageDecoder::kGIF_Format:
case SkImageDecoder::kJPEG_Format:
return true;
}
SkASSERT(false);
return true;
}
/**
* Test decoding an image in premultiplied mode and unpremultiplied mode and compare
* them.
*/
static void compare_unpremul(skiatest::Reporter* reporter, const SkString& filename) {
// Decode a resource:
SkBitmap bm8888;
SkBitmap bm8888Unpremul;
SkFILEStream stream(filename.c_str());
SkImageDecoder::Format format = SkImageDecoder::GetStreamFormat(&stream);
if (skip_image_format(format)) {
return;
}
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(&stream));
if (nullptr == decoder.get()) {
SkDebugf("couldn't decode %s\n", filename.c_str());
return;
}
bool success = decoder->decode(&stream, &bm8888, kN32_SkColorType,
SkImageDecoder::kDecodePixels_Mode) != SkImageDecoder::kFailure;
if (!success) {
return;
}
success = stream.rewind();
REPORTER_ASSERT(reporter, success);
if (!success) {
return;
}
decoder->setRequireUnpremultipliedColors(true);
success = decoder->decode(&stream, &bm8888Unpremul, kN32_SkColorType,
SkImageDecoder::kDecodePixels_Mode) != SkImageDecoder::kFailure;
if (!success) {
return;
}
bool dimensionsMatch = bm8888.width() == bm8888Unpremul.width()
&& bm8888.height() == bm8888Unpremul.height();
REPORTER_ASSERT(reporter, dimensionsMatch);
if (!dimensionsMatch) {
return;
}
// Only do the comparison if the two bitmaps are both 8888.
if (bm8888.colorType() != kN32_SkColorType || bm8888Unpremul.colorType() != kN32_SkColorType) {
return;
}
// Now compare the two bitmaps.
for (int i = 0; i < bm8888.width(); ++i) {
for (int j = 0; j < bm8888.height(); ++j) {
// "c0" is the color of the premultiplied bitmap at (i, j).
const SkPMColor c0 = *bm8888.getAddr32(i, j);
// "c1" is the result of premultiplying the color of the unpremultiplied
// bitmap at (i, j).
const SkPMColor c1 = premultiply_unpmcolor(*bm8888Unpremul.getAddr32(i, j));
// Compute the difference for each component.
int da = SkAbs32(SkGetPackedA32(c0) - SkGetPackedA32(c1));
int dr = SkAbs32(SkGetPackedR32(c0) - SkGetPackedR32(c1));
int dg = SkAbs32(SkGetPackedG32(c0) - SkGetPackedG32(c1));
int db = SkAbs32(SkGetPackedB32(c0) - SkGetPackedB32(c1));
// Alpha component must be exactly the same.
REPORTER_ASSERT(reporter, 0 == da);
// Color components may not match exactly due to rounding error.
REPORTER_ASSERT(reporter, dr <= 1);
REPORTER_ASSERT(reporter, dg <= 1);
REPORTER_ASSERT(reporter, db <= 1);
}
}
}
static void test_unpremul(skiatest::Reporter* reporter) {
// This test cannot run if there is no resource path.
SkString resourcePath = GetResourcePath();
if (resourcePath.isEmpty()) {
SkDebugf("Could not run unpremul test because resourcePath not specified.");
return;
}
SkOSFile::Iter iter(resourcePath.c_str());
SkString basename;
if (iter.next(&basename)) {
do {
SkString filename = SkOSPath::Join(resourcePath.c_str(), basename.c_str());
// SkDebugf("about to decode \"%s\"\n", filename.c_str());
compare_unpremul(reporter, filename);
} while (iter.next(&basename));
} else {
SkDebugf("Failed to find any files :(\n");
}
}
#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
// Test that the alpha type is what we expect.
static void test_alphaType(skiatest::Reporter* reporter, const SkString& filename,
bool requireUnpremul) {
SkBitmap bm;
SkFILEStream stream(filename.c_str());
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(&stream));
if (nullptr == decoder.get()) {
return;
}
decoder->setRequireUnpremultipliedColors(requireUnpremul);
// Decode just the bounds. This should always succeed.
bool success = decoder->decode(&stream, &bm, kN32_SkColorType,
SkImageDecoder::kDecodeBounds_Mode);
REPORTER_ASSERT(reporter, success);
if (!success) {
return;
}
// Keep track of the alpha type for testing later. If the full decode
// succeeds, the alpha type should be the same, unless the full decode
// determined that the alpha type should actually be opaque, which may
// not be known when only decoding the bounds.
const SkAlphaType boundsAlphaType = bm.alphaType();
// rewind should always succeed on SkFILEStream.
success = stream.rewind();
REPORTER_ASSERT(reporter, success);
if (!success) {
return;
}
success = decoder->decode(&stream, &bm, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
if (!success) {
// When the decoder is set to require unpremul, if it does not support
// unpremul it will fail. This is the only reason the decode should
// fail (since we know the files we are using to test can be decoded).
REPORTER_ASSERT(reporter, requireUnpremul);
return;
}
// The bounds decode should return with either the requested
// premul/unpremul or opaque, if that value could be determined when only
// decoding the bounds.
if (requireUnpremul) {
REPORTER_ASSERT(reporter, kUnpremul_SkAlphaType == boundsAlphaType
|| kOpaque_SkAlphaType == boundsAlphaType
|| filename.endsWith(".ico"));
// TODO(halcanary): Find out why color_wheel.ico fails this test.
} else {
REPORTER_ASSERT(reporter, kPremul_SkAlphaType == boundsAlphaType
|| kOpaque_SkAlphaType == boundsAlphaType);
}
// When decoding the full image, the alpha type should match the one
// returned by the bounds decode, unless the full decode determined that
// the alpha type is actually opaque.
REPORTER_ASSERT(reporter, bm.alphaType() == boundsAlphaType
|| bm.alphaType() == kOpaque_SkAlphaType);
}
DEF_TEST(ImageDecoding_alphaType, reporter) {
SkString resourcePath = GetResourcePath();
if (resourcePath.isEmpty()) {
SkDebugf("Could not run alphaType test because resourcePath not specified.");
return;
}
SkOSFile::Iter iter(resourcePath.c_str());
SkString basename;
if (iter.next(&basename)) {
do {
SkString filename = SkOSPath::Join(resourcePath.c_str(), basename.c_str());
for (int truth = 0; truth <= 1; ++truth) {
test_alphaType(reporter, filename, SkToBool(truth));
}
} while (iter.next(&basename));
} else {
SkDebugf("Failed to find any files :(\n");
}
}
// Using known images, test that decoding into unpremul and premul behave as expected.
DEF_TEST(ImageDecoding_unpremul, reporter) {
SkString resourcePath = GetResourcePath();
if (resourcePath.isEmpty()) {
SkDebugf("Could not run unpremul test because resourcePath not specified.");
return;
}
const char* root = "half-transparent-white-pixel";
const char* suffixes[] = { ".png", ".webp" };
for (size_t i = 0; i < SK_ARRAY_COUNT(suffixes); ++i) {
SkString basename = SkStringPrintf("%s%s", root, suffixes[i]);
SkString fullName = SkOSPath::Join(resourcePath.c_str(), basename.c_str());
SkBitmap bm;
SkFILEStream stream(fullName.c_str());
if (!stream.isValid()) {
SkDebugf("file %s missing from resource directoy %s\n",
basename.c_str(), resourcePath.c_str());
continue;
}
// This should never fail since we know the images we're decoding.
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(&stream));
REPORTER_ASSERT(reporter, decoder.get());
if (nullptr == decoder.get()) {
continue;
}
// Test unpremultiplied. We know what color this should result in.
decoder->setRequireUnpremultipliedColors(true);
bool success = decoder->decode(&stream, &bm, kN32_SkColorType,
SkImageDecoder::kDecodePixels_Mode);
REPORTER_ASSERT(reporter, success);
if (!success) {
continue;
}
REPORTER_ASSERT(reporter, bm.width() == 1 && bm.height() == 1);
{
SkAutoLockPixels alp(bm);
REPORTER_ASSERT(reporter, bm.getAddr32(0, 0)[0] == 0x7fffffff);
}
success = stream.rewind();
REPORTER_ASSERT(reporter, success);
if (!success) {
continue;
}
// Test premultiplied. Once again, we know which color this should
// result in.
decoder->setRequireUnpremultipliedColors(false);
success = decoder->decode(&stream, &bm, kN32_SkColorType,
SkImageDecoder::kDecodePixels_Mode);
REPORTER_ASSERT(reporter, success);
if (!success) {
continue;
}
REPORTER_ASSERT(reporter, bm.width() == 1 && bm.height() == 1);
{
SkAutoLockPixels alp(bm);
REPORTER_ASSERT(reporter, bm.getAddr32(0, 0)[0] == 0x7f7f7f7f);
}
}
}
#endif // SK_BUILD_FOR_UNIX/ANDROID skbug.com/2388
#ifdef SK_DEBUG
// Test inside SkScaledBitmapSampler.cpp
extern void test_row_proc_choice();
#endif // SK_DEBUG
DEF_TEST(ImageDecoding, reporter) {
test_unpremul(reporter);
#ifdef SK_DEBUG
test_row_proc_choice();
#endif
}
// expected output for 8x8 bitmap
static const int kExpectedWidth = 8;
static const int kExpectedHeight = 8;
static const SkColor kExpectedPixels[] = {
0xffbba570, 0xff395f5d, 0xffe25c39, 0xff197666,
0xff3cba27, 0xffdefcb0, 0xffc13874, 0xfffa0093,
0xffbda60e, 0xffc01db6, 0xff2bd688, 0xff9362d4,
0xffc641b2, 0xffa5cede, 0xff606eba, 0xff8f4bf3,
0xff3bf742, 0xff8f02a8, 0xff5509df, 0xffc7027e,
0xff24aa8a, 0xff886c96, 0xff625481, 0xff403689,
0xffc52152, 0xff78ccd6, 0xffdcb4ab, 0xff09d27d,
0xffca00f3, 0xff605d47, 0xff446fb2, 0xff576e46,
0xff273df9, 0xffb41a83, 0xfff812c3, 0xffccab67,
0xff034218, 0xff7db9a7, 0xff821048, 0xfffe4ab4,
0xff6fac98, 0xff941d27, 0xff5fe411, 0xfffbb283,
0xffd86e99, 0xff169162, 0xff71128c, 0xff39cab4,
0xffa7fe63, 0xff4c956b, 0xffbc22e0, 0xffb272e4,
0xff129f4a, 0xffe34513, 0xff3d3742, 0xffbd190a,
0xffb07222, 0xff2e23f8, 0xfff089d9, 0xffb35738,
0xffa86022, 0xff3340fe, 0xff95fe71, 0xff6a71df
};
static_assert((kExpectedWidth * kExpectedHeight) == SK_ARRAY_COUNT(kExpectedPixels),
"array_size_mismatch");
DEF_TEST(WebP, reporter) {
const unsigned char encodedWebP[] = {
0x52, 0x49, 0x46, 0x46, 0x2c, 0x01, 0x00, 0x00, 0x57, 0x45, 0x42, 0x50,
0x56, 0x50, 0x38, 0x4c, 0x20, 0x01, 0x00, 0x00, 0x2f, 0x07, 0xc0, 0x01,
0x00, 0xff, 0x01, 0x45, 0x03, 0x00, 0xe2, 0xd5, 0xae, 0x60, 0x2b, 0xad,
0xd9, 0x68, 0x76, 0xb6, 0x8d, 0x6a, 0x1d, 0xc0, 0xe6, 0x19, 0xd6, 0x16,
0xb7, 0xb4, 0xef, 0xcf, 0xc3, 0x15, 0x6c, 0xb3, 0xbd, 0x77, 0x0d, 0x85,
0x6d, 0x1b, 0xa9, 0xb1, 0x2b, 0xdc, 0x3d, 0x83, 0xdb, 0x00, 0x00, 0xc8,
0x26, 0xe5, 0x01, 0x99, 0x8a, 0xd5, 0xdd, 0xfc, 0x82, 0xcd, 0xcd, 0x9a,
0x8c, 0x13, 0xcc, 0x1b, 0xba, 0xf5, 0x05, 0xdb, 0xee, 0x6a, 0xdb, 0x38,
0x60, 0xfe, 0x43, 0x2c, 0xd4, 0x6a, 0x99, 0x4d, 0xc6, 0xc0, 0xd3, 0x28,
0x1b, 0xc1, 0xb1, 0x17, 0x4e, 0x43, 0x0e, 0x3d, 0x27, 0xe9, 0xe4, 0x84,
0x4f, 0x24, 0x62, 0x69, 0x85, 0x43, 0x8d, 0xc2, 0x04, 0x00, 0x07, 0x59,
0x60, 0xfd, 0x8b, 0x4d, 0x60, 0x32, 0x72, 0xcf, 0x88, 0x0c, 0x2f, 0x2f,
0xad, 0x62, 0xbd, 0x27, 0x09, 0x16, 0x70, 0x78, 0x6c, 0xd9, 0x82, 0xef,
0x1a, 0xa2, 0xcc, 0xf0, 0xf1, 0x6f, 0xd8, 0x78, 0x2e, 0x39, 0xa1, 0xcf,
0x14, 0x4b, 0x89, 0xb4, 0x1b, 0x48, 0x15, 0x7c, 0x48, 0x6f, 0x8c, 0x20,
0xb7, 0x00, 0xcf, 0xfc, 0xdb, 0xd0, 0xe9, 0xe7, 0x42, 0x09, 0xa4, 0x03,
0x40, 0xac, 0xda, 0x40, 0x01, 0x00, 0x5f, 0xa1, 0x3d, 0x64, 0xe1, 0xf4,
0x03, 0x45, 0x29, 0xe0, 0xe2, 0x4a, 0xc3, 0xa2, 0xe8, 0xe0, 0x25, 0x12,
0x74, 0xc6, 0xe8, 0xfb, 0x93, 0x4f, 0x9f, 0x5e, 0xc0, 0xa6, 0x91, 0x1b,
0xa4, 0x24, 0x82, 0xc3, 0x61, 0x07, 0x4c, 0x49, 0x4f, 0x53, 0xae, 0x5f,
0x5d, 0x39, 0x36, 0xc0, 0x5b, 0x57, 0x54, 0x60, 0x10, 0x00, 0x00, 0xd1,
0x68, 0xb6, 0x6d, 0xdb, 0x36, 0x22, 0xfa, 0x1f, 0x35, 0x75, 0x22, 0xec,
0x31, 0xbc, 0x5d, 0x8f, 0x87, 0x53, 0xa2, 0x05, 0x8c, 0x2f, 0xcd, 0xa8,
0xa7, 0xf3, 0xa3, 0xbd, 0x83, 0x8b, 0x2a, 0xc8, 0x58, 0xf5, 0xac, 0x80,
0xe3, 0xfe, 0x66, 0xa4, 0x7c, 0x1b, 0x6c, 0xd1, 0xa9, 0xd8, 0x14, 0xd0,
0xc5, 0xb5, 0x39, 0x71, 0x97, 0x19, 0x19, 0x1b
};
SkAutoDataUnref encoded(SkData::NewWithCopy(encodedWebP,
sizeof(encodedWebP)));
SkBitmap bm;
bool success = SkInstallDiscardablePixelRef(encoded, &bm);
REPORTER_ASSERT(reporter, success);
if (!success) {
return;
}
SkAutoLockPixels alp(bm);
bool rightSize = ((kExpectedWidth == bm.width())
&& (kExpectedHeight == bm.height()));
REPORTER_ASSERT(reporter, rightSize);
if (rightSize) {
bool error = false;
const SkColor* correctPixel = kExpectedPixels;
for (int y = 0; y < bm.height(); ++y) {
for (int x = 0; x < bm.width(); ++x) {
error |= (*correctPixel != bm.getColor(x, y));
++correctPixel;
}
}
REPORTER_ASSERT(reporter, !error);
}
}
////////////////////////////////////////////////////////////////////////////////
// example of how Android will do this inside their BitmapFactory
static SkPixelRef* install_pixel_ref(SkBitmap* bitmap,
SkStreamRewindable* stream,
int sampleSize, bool ditherImage) {
SkASSERT(bitmap != nullptr);
SkASSERT(stream != nullptr);
SkASSERT(stream->rewind());
SkColorType colorType = bitmap->colorType();
SkDecodingImageGenerator::Options opts(sampleSize, ditherImage, colorType);
if (SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(stream, opts), bitmap)) {
return bitmap->pixelRef();
}
return nullptr;
}
/**
* A test for the SkDecodingImageGenerator::Create and
* SkInstallDiscardablePixelRef functions.
*/
DEF_TEST(ImprovedBitmapFactory, reporter) {
SkString pngFilename = GetResourcePath("randPixels.png");
SkAutoTDelete<SkStreamRewindable> stream(SkStream::NewFromFile(pngFilename.c_str()));
if (sk_exists(pngFilename.c_str())) {
SkBitmap bm;
SkAssertResult(bm.setInfo(SkImageInfo::MakeN32Premul(1, 1)));
REPORTER_ASSERT(reporter,
install_pixel_ref(&bm, stream.detach(), 1, true));
SkAutoLockPixels alp(bm);
REPORTER_ASSERT(reporter, bm.getPixels());
}
}
////////////////////////////////////////////////////////////////////////////////
#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
static inline bool check_rounding(int value, int dividend, int divisor) {
// returns true if the value is greater than floor(dividend/divisor)
// and less than SkNextPow2(ceil(dividend - divisor))
return (((divisor * value) > (dividend - divisor))
&& value <= SkNextPow2(((dividend - 1) / divisor) + 1));
}
#endif // SK_BUILD_FOR_ANDROID || SK_BUILD_FOR_UNIX
#if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
#define kBackwards_SkColorType kRGBA_8888_SkColorType
#elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
#define kBackwards_SkColorType kBGRA_8888_SkColorType
#else
#error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order"
#endif
static inline const char* SkColorType_to_string(SkColorType colorType) {
switch(colorType) {
case kAlpha_8_SkColorType: return "Alpha_8";
case kRGB_565_SkColorType: return "RGB_565";
case kARGB_4444_SkColorType: return "ARGB_4444";
case kN32_SkColorType: return "N32";
case kBackwards_SkColorType: return "Backwards";
case kIndex_8_SkColorType: return "Index_8";
default: return "ERROR";
}
}
static inline const char* options_colorType(
const SkDecodingImageGenerator::Options& opts) {
if (opts.fUseRequestedColorType) {
return SkColorType_to_string(opts.fRequestedColorType);
} else {
return "(none)";
}
}
static inline const char* yn(bool value) {
if (value) {
return "yes";
} else {
return "no";
}
}
/**
* Given either a SkStream or a SkData, try to decode the encoded
* image using the specified options and report errors.
*/
static void test_options(skiatest::Reporter* reporter,
const SkDecodingImageGenerator::Options& opts,
SkStreamRewindable* encodedStream,
SkData* encodedData,
bool useData,
const SkString& path) {
SkBitmap bm;
bool success = false;
if (useData) {
if (nullptr == encodedData) {
return;
}
success = SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(encodedData, opts), &bm);
} else {
if (nullptr == encodedStream) {
return;
}
success = SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(encodedStream->duplicate(), opts), &bm);
}
if (!success) {
if (opts.fUseRequestedColorType
&& (kARGB_4444_SkColorType == opts.fRequestedColorType)) {
return; // Ignore known conversion inabilities.
}
// If we get here, it's a failure and we will need more
// information about why it failed.
ERRORF(reporter, "Bounds decode failed [sampleSize=%d dither=%s "
"colorType=%s %s]", opts.fSampleSize, yn(opts.fDitherImage),
options_colorType(opts), path.c_str());
return;
}
#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
// Android is the only system that use Skia's image decoders in
// production. For now, we'll only verify that samplesize works
// on systems where it already is known to work.
REPORTER_ASSERT(reporter, check_rounding(bm.height(), kExpectedHeight,
opts.fSampleSize));
REPORTER_ASSERT(reporter, check_rounding(bm.width(), kExpectedWidth,
opts.fSampleSize));
// The ImageDecoder API doesn't guarantee that SampleSize does
// anything at all, but the decoders that this test excercises all
// produce an output size in the following range:
// (((sample_size * out_size) > (in_size - sample_size))
// && out_size <= SkNextPow2(((in_size - 1) / sample_size) + 1));
#endif // SK_BUILD_FOR_ANDROID || SK_BUILD_FOR_UNIX
SkAutoLockPixels alp(bm);
if (bm.getPixels() == nullptr) {
ERRORF(reporter, "Pixel decode failed [sampleSize=%d dither=%s "
"colorType=%s %s]", opts.fSampleSize, yn(opts.fDitherImage),
options_colorType(opts), path.c_str());
return;
}
SkColorType requestedColorType = opts.fRequestedColorType;
REPORTER_ASSERT(reporter,
(!opts.fUseRequestedColorType)
|| (bm.colorType() == requestedColorType));
// Condition under which we should check the decoding results:
if ((kN32_SkColorType == bm.colorType())
&& (!path.endsWith(".jpg")) // lossy
&& (opts.fSampleSize == 1)) { // scaled
const SkColor* correctPixels = kExpectedPixels;
SkASSERT(bm.height() == kExpectedHeight);
SkASSERT(bm.width() == kExpectedWidth);
int pixelErrors = 0;
for (int y = 0; y < bm.height(); ++y) {
for (int x = 0; x < bm.width(); ++x) {
if (*correctPixels != bm.getColor(x, y)) {
++pixelErrors;
}
++correctPixels;
}
}
if (pixelErrors != 0) {
ERRORF(reporter, "Pixel-level mismatch (%d of %d) "
"[sampleSize=%d dither=%s colorType=%s %s]",
pixelErrors, kExpectedHeight * kExpectedWidth,
opts.fSampleSize, yn(opts.fDitherImage),
options_colorType(opts), path.c_str());
}
}
}
/**
* SkDecodingImageGenerator has an Options struct which lets the
* client of the generator set sample size, dithering, and bitmap
* config. This test loops through many possible options and tries
* them on a set of 5 small encoded images (each in a different
* format). We test both SkData and SkStreamRewindable decoding.
*/
DEF_TEST(ImageDecoderOptions, reporter) {
const char* files[] = {
"randPixels.bmp",
"randPixels.jpg",
"randPixels.png",
"randPixels.webp",
#if !defined(SK_BUILD_FOR_WIN)
// TODO(halcanary): Find out why this fails sometimes.
"randPixels.gif",
#endif
};
SkString resourceDir = GetResourcePath();
if (!sk_exists(resourceDir.c_str())) {
return;
}
int scaleList[] = {1, 2, 3, 4};
bool ditherList[] = {true, false};
SkColorType colorList[] = {
kAlpha_8_SkColorType,
kRGB_565_SkColorType,
kARGB_4444_SkColorType, // Most decoders will fail on 4444.
kN32_SkColorType
// Note that indexed color is left out of the list. Lazy
// decoding doesn't do indexed color.
};
const bool useDataList[] = {true, false};
for (size_t fidx = 0; fidx < SK_ARRAY_COUNT(files); ++fidx) {
SkString path = SkOSPath::Join(resourceDir.c_str(), files[fidx]);
if (!sk_exists(path.c_str())) {
continue;
}
SkAutoDataUnref encodedData(SkData::NewFromFileName(path.c_str()));
REPORTER_ASSERT(reporter, encodedData.get() != nullptr);
SkAutoTDelete<SkStreamRewindable> encodedStream(
SkStream::NewFromFile(path.c_str()));
REPORTER_ASSERT(reporter, encodedStream.get() != nullptr);
for (size_t i = 0; i < SK_ARRAY_COUNT(scaleList); ++i) {
for (size_t j = 0; j < SK_ARRAY_COUNT(ditherList); ++j) {
for (size_t m = 0; m < SK_ARRAY_COUNT(useDataList); ++m) {
for (size_t k = 0; k < SK_ARRAY_COUNT(colorList); ++k) {
SkDecodingImageGenerator::Options opts(scaleList[i],
ditherList[j],
colorList[k]);
test_options(reporter, opts, encodedStream, encodedData,
useDataList[m], path);
}
SkDecodingImageGenerator::Options options(scaleList[i],
ditherList[j]);
test_options(reporter, options, encodedStream, encodedData,
useDataList[m], path);
}
}
}
}
}
DEF_TEST(DiscardablePixelRef_SecondLockColorTableCheck, r) {
SkString resourceDir = GetResourcePath();
SkString path = SkOSPath::Join(resourceDir.c_str(), "randPixels.gif");
if (!sk_exists(path.c_str())) {
return;
}
SkAutoDataUnref encoded(SkData::NewFromFileName(path.c_str()));
SkBitmap bitmap;
if (!SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(
encoded, SkDecodingImageGenerator::Options()), &bitmap)) {
#ifndef SK_BUILD_FOR_WIN
ERRORF(r, "SkInstallDiscardablePixelRef [randPixels.gif] failed.");
#endif
return;
}
if (kIndex_8_SkColorType != bitmap.colorType()) {
return;
}
{
SkAutoLockPixels alp(bitmap);
REPORTER_ASSERT(r, bitmap.getColorTable() && "first pass");
}
{
SkAutoLockPixels alp(bitmap);
REPORTER_ASSERT(r, bitmap.getColorTable() && "second pass");
}
}
////////////////////////////////////////////////////////////////////////////////
namespace {
class SingleAllocator : public SkBitmap::Allocator {
public:
SingleAllocator(void* p, size_t s) : fPixels(p), fSize(s) { }
~SingleAllocator() {}
// If the pixels in fPixels are big enough, use them.
bool allocPixelRef(SkBitmap* bm, SkColorTable* ct) override {
SkASSERT(bm);
if (bm->info().getSafeSize(bm->rowBytes()) <= fSize) {
bm->setPixels(fPixels, ct);
fPixels = nullptr;
fSize = 0;
return true;
}
return bm->tryAllocPixels(nullptr, ct);
}
bool ready() { return fPixels != nullptr; }
private:
void* fPixels;
size_t fSize;
};
} // namespace
/* This tests for a bug in libjpeg where INT32 is typedefed to long
and memory can be written to outside of the array. */
DEF_TEST(ImageDecoding_JpegOverwrite, r) {
SkString resourceDir = GetResourcePath();
SkString path = SkOSPath::Join(resourceDir.c_str(), "randPixels.jpg");
SkAutoTDelete<SkStreamAsset> stream(
SkStream::NewFromFile(path.c_str()));
if (!stream.get()) {
SkDebugf("\nPath '%s' missing.\n", path.c_str());
return;
}
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(stream));
if (nullptr == decoder.get()) {
ERRORF(r, "\nSkImageDecoder::Factory failed.\n");
return;
}
SkAssertResult(stream->rewind());
static const uint16_t sentinal = 0xBEEF;
static const int pixelCount = 16;
SkAutoTMalloc<uint16_t> pixels(pixelCount + 1);
// pixels.get() should be 4-byte aligned.
// This is necessary to reproduce the bug.
pixels[pixelCount] = sentinal; // This value should not be changed.
SkAutoTUnref<SingleAllocator> allocator(
new SingleAllocator((void*)pixels.get(), sizeof(uint16_t) * pixelCount));
decoder->setAllocator(allocator);
decoder->setSampleSize(2);
SkBitmap bitmap;
bool success = decoder->decode(stream, &bitmap, kRGB_565_SkColorType,
SkImageDecoder::kDecodePixels_Mode) != SkImageDecoder::kFailure;
REPORTER_ASSERT(r, success);
REPORTER_ASSERT(r, !allocator->ready()); // Decoder used correct memory
REPORTER_ASSERT(r, sentinal == pixels[pixelCount]);
}
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