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skia2/tests/PDFJpegEmbedTest.cpp
halcanary 57f744e303 SkPDF/Tests: imporve test coverage. 
Also: make sure that all SkPDF unit tests are named SkPDF_* to
make testing changes to SkPDF easier.  Other cleanup.

Add test: SkPDF_pdfa_document to verify that flag in public API
works.

SkPDF_JpegIdentification test: test slightly malformed JPEGs to
verify that all code paths work.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2322133003

Review-Url: https://codereview.chromium.org/2322133003
2016-09-09 11:41:59 -07:00

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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCanvas.h"
#include "SkData.h"
#include "SkDocument.h"
#include "SkImageGenerator.h"
#include "SkJpegInfo.h"
#include "SkStream.h"
#include "Resources.h"
#include "Test.h"
// Returned bitmap is lazy. Only lazy bitmaps hold onto the original data.
static SkBitmap bitmap_from_data(SkData* data) {
SkASSERT(data);
SkBitmap bm;
SkDEPRECATED_InstallDiscardablePixelRef(data, &bm);
return bm;
}
static bool is_subset_of(SkData* smaller, SkData* larger) {
SkASSERT(smaller && larger);
if (smaller->size() > larger->size()) {
return false;
}
size_t size = smaller->size();
size_t size_diff = larger->size() - size;
for (size_t i = 0; i <= size_diff; ++i) {
if (0 == memcmp(larger->bytes() + i, smaller->bytes(), size)) {
return true;
}
}
return false;
}
static sk_sp<SkData> load_resource(
skiatest::Reporter* r, const char* test, const char* filename) {
SkString path(GetResourcePath(filename));
sk_sp<SkData> data(SkData::MakeFromFileName(path.c_str()));
if (!data) {
INFOF(r, "\n%s: Resource '%s' can not be found.\n",
test, filename);
}
return data; // May return nullptr.
}
/**
* Test that for Jpeg files that use the JFIF colorspace, they are
* directly embedded into the PDF (without re-encoding) when that
* makes sense.
*/
DEF_TEST(SkPDF_JpegEmbedTest, r) {
REQUIRE_PDF_DOCUMENT(SkPDF_JpegEmbedTest, r);
const char test[] = "SkPDF_JpegEmbedTest";
sk_sp<SkData> mandrillData(load_resource(r, test, "mandrill_512_q075.jpg"));
sk_sp<SkData> cmykData(load_resource(r, test, "CMYK.jpg"));
if (!mandrillData || !cmykData) {
return;
}
////////////////////////////////////////////////////////////////////////////
SkDynamicMemoryWStream pdf;
sk_sp<SkDocument> document(SkDocument::MakePDF(&pdf));
SkCanvas* canvas = document->beginPage(642, 1028);
canvas->clear(SK_ColorLTGRAY);
SkBitmap bm1(bitmap_from_data(mandrillData.get()));
canvas->drawBitmap(bm1, 65.0, 0.0, nullptr);
SkBitmap bm2(bitmap_from_data(cmykData.get()));
canvas->drawBitmap(bm2, 0.0, 512.0, nullptr);
canvas->flush();
document->endPage();
document->close();
sk_sp<SkData> pdfData(pdf.copyToData());
SkASSERT(pdfData);
pdf.reset();
REPORTER_ASSERT(r, is_subset_of(mandrillData.get(), pdfData.get()));
// This JPEG uses a nonstandard colorspace - it can not be
// embedded into the PDF directly.
REPORTER_ASSERT(r, !is_subset_of(cmykData.get(), pdfData.get()));
////////////////////////////////////////////////////////////////////////////
pdf.reset();
document = SkDocument::MakePDF(&pdf);
canvas = document->beginPage(642, 1028);
canvas->clear(SK_ColorLTGRAY);
sk_sp<SkImage> im1(SkImage::MakeFromEncoded(mandrillData));
canvas->drawImage(im1.get(), 65.0, 0.0, nullptr);
sk_sp<SkImage> im2(SkImage::MakeFromEncoded(cmykData));
canvas->drawImage(im2.get(), 0.0, 512.0, nullptr);
canvas->flush();
document->endPage();
document->close();
pdfData.reset(pdf.copyToData());
SkASSERT(pdfData);
pdf.reset();
REPORTER_ASSERT(r, is_subset_of(mandrillData.get(), pdfData.get()));
// This JPEG uses a nonstandard colorspace - it can not be
// embedded into the PDF directly.
REPORTER_ASSERT(r, !is_subset_of(cmykData.get(), pdfData.get()));
}
DEF_TEST(SkPDF_JpegIdentification, r) {
static struct {
const char* path;
bool isJfif;
SkJFIFInfo::Type type;
} kTests[] = {{"CMYK.jpg", false, SkJFIFInfo::kGrayscale},
{"color_wheel.jpg", true, SkJFIFInfo::kYCbCr},
{"grayscale.jpg", true, SkJFIFInfo::kGrayscale},
{"mandrill_512_q075.jpg", true, SkJFIFInfo::kYCbCr},
{"randPixels.jpg", true, SkJFIFInfo::kYCbCr}};
for (size_t i = 0; i < SK_ARRAY_COUNT(kTests); ++i) {
sk_sp<SkData> data(load_resource(r, "JpegIdentification", kTests[i].path));
if (!data) {
continue;
}
SkJFIFInfo info;
bool isJfif = SkIsJFIF(data.get(), &info);
if (isJfif != kTests[i].isJfif) {
ERRORF(r, "%s failed isJfif test", kTests[i].path);
continue;
}
if (!isJfif) {
continue; // not applicable
}
if (kTests[i].type != info.fType) {
ERRORF(r, "%s failed jfif type test", kTests[i].path);
continue;
}
INFOF(r, "\nJpegIdentification: %s [%d x %d]\n", kTests[i].path,
info.fSize.width(), info.fSize.height());
}
// Test several malformed jpegs.
SkJFIFInfo info;
{
static const char goodJpeg[] =
"\377\330\377\340\0\20JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
"\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
"\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
"\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
"22222222222222\377\300\0\21\10\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
size_t goodJpegLength = 177;
auto data = SkData::MakeWithoutCopy(goodJpeg, goodJpegLength);
REPORTER_ASSERT(r, SkIsJFIF(data.get(), &info));
REPORTER_ASSERT(r, info.fSize == SkISize::Make(512, 512));
REPORTER_ASSERT(r, info.fType == SkJFIFInfo::kYCbCr);
// Not long enough to read first (SOI) segment marker.
data = SkData::MakeWithoutCopy(goodJpeg, 1);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
// Not long enough to read second segment (APP0) marker.
data = SkData::MakeWithoutCopy(goodJpeg, 3);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
// Not long enough to read second segment's length.
data = SkData::MakeWithoutCopy(goodJpeg, 5);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
// APP0 segment is truncated.
data = SkData::MakeWithoutCopy(goodJpeg, 7);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
// Missing SOF segment.
data = SkData::MakeWithoutCopy(goodJpeg, 89);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
}
{
// JFIF tag missing.
static const char jpeg[] =
"\377\330\377\340\0\20JFIX\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
"\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
"\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
"\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
"22222222222222\377\300\0\21\10\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
size_t jpegLength = 177;
auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
}
{
// APP0 segment short (byte 6 changed).
static const char jpeg[] =
"\377\330\377\340\0\5JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
"\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
"\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
"\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
"22222222222222\377\300\0\21\10\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
size_t jpegLength = 177;
auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
}
{
// SOF segment short. ('\21' replaced with '\5')
static const char jpeg[] =
"\377\330\377\340\0\20JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
"\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
"\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
"\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
"22222222222222\377\300\0\5\10\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
size_t jpegLength = 177;
auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
}
{
// Unsupported 12-bit components. ('\10' replaced with '\14')
static const char jpeg[] =
"\377\330\377\340\0\20JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
"\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
"\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
"\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
"22222222222222\377\300\0\21\14\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
size_t jpegLength = 177;
auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
}
{
// Two color channels. ('\3' replaced with '\2')
static const char jpeg[] =
"\377\330\377\340\0\20JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
"\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
"\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
"\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
"22222222222222\377\300\0\21\10\2\0\2\0\2\1\"\0\2\21\1\3\21\001";
size_t jpegLength = 177;
auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
}
}
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