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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <sal/config.h>
#include <string_view>
#include <unotest/bootstrapfixturebase.hxx>
#include <vcl/graphicfilter.hxx>
#include <vcl/BitmapReadAccess.hxx>
#include <tools/stream.hxx>
#include <graphic/GraphicFormatDetector.hxx>
constexpr OUStringLiteral gaDataUrl(u"/vcl/qa/cppunit/jpeg/data/");
class JpegWriterTest : public test::BootstrapFixtureBase
{
OUString getFullUrl(std::u16string_view sFileName)
{
return m_directories.getURLFromSrc(gaDataUrl) + sFileName;
}
BitmapEx load(const OUString& aURL);
BitmapEx roundtripJPG(const BitmapEx& bitmap);
BitmapEx roundtripJPG(const OUString& aURL);
public:
void testWrite8BitGrayscale();
void testWrite8BitNonGrayscale();
CPPUNIT_TEST_SUITE(JpegWriterTest);
CPPUNIT_TEST(testWrite8BitGrayscale);
CPPUNIT_TEST(testWrite8BitNonGrayscale);
CPPUNIT_TEST_SUITE_END();
};
BitmapEx JpegWriterTest::load(const OUString& aURL)
{
GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
Graphic aGraphic;
SvFileStream aFileStream(aURL, StreamMode::READ);
ErrCode bResult = rFilter.ImportGraphic(aGraphic, aURL, aFileStream);
CPPUNIT_ASSERT_EQUAL(ERRCODE_NONE, bResult);
return aGraphic.GetBitmapEx();
}
BitmapEx JpegWriterTest::roundtripJPG(const OUString& aURL) { return roundtripJPG(load(aURL)); }
BitmapEx JpegWriterTest::roundtripJPG(const BitmapEx& bitmap)
{
// EXPORT JPEG
SvMemoryStream aStream;
GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
sal_uInt16 exportFormatJPG = rFilter.GetExportFormatNumberForShortName(JPG_SHORTNAME);
Graphic aExportGraphic(bitmap);
ErrCode bResult = rFilter.ExportGraphic(aExportGraphic, u"memory", aStream, exportFormatJPG);
CPPUNIT_ASSERT_EQUAL(ERRCODE_NONE, bResult);
//Detect the magic bytes - we need to be sure the file is actually a JPEG
aStream.Seek(0);
vcl::GraphicFormatDetector aDetector(aStream, "");
CPPUNIT_ASSERT(aDetector.detect());
CPPUNIT_ASSERT(aDetector.checkJPG());
// IMPORT JPEG
aStream.Seek(0);
Graphic aImportGraphic;
sal_uInt16 importFormatJPG = rFilter.GetImportFormatNumberForShortName(JPG_SHORTNAME);
bResult = rFilter.ImportGraphic(aImportGraphic, u"memory", aStream, importFormatJPG);
CPPUNIT_ASSERT_EQUAL(ERRCODE_NONE, bResult);
return aImportGraphic.GetBitmapEx();
}
void JpegWriterTest::testWrite8BitGrayscale()
{
Bitmap bitmap = roundtripJPG(getFullUrl(u"8BitGrayscale.jpg")).GetBitmap();
Bitmap::ScopedReadAccess access(bitmap);
const ScanlineFormat format = access->GetScanlineFormat();
// Check that it's still 8bit grayscale.
CPPUNIT_ASSERT_EQUAL(ScanlineFormat::N8BitPal, format);
CPPUNIT_ASSERT(bitmap.HasGreyPalette8Bit());
// Check that the content is valid.
CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_WHITE), access->GetColor(0, 0));
CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_WHITE), access->GetColor(0, access->Width() - 1));
CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_WHITE), access->GetColor(access->Height() - 1, 0));
CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_BLACK),
access->GetColor(access->Height() - 1, access->Width() - 1));
}
void JpegWriterTest::testWrite8BitNonGrayscale()
{
Bitmap bitmap = roundtripJPG(getFullUrl(u"8BitNonGrayscale.gif")).GetBitmap();
Bitmap::ScopedReadAccess access(bitmap);
const ScanlineFormat format = access->GetScanlineFormat();
// Check that it's still 8bit grayscale.
CPPUNIT_ASSERT_EQUAL(ScanlineFormat::N8BitPal, format);
// The original image has grayscale palette, just with entries in a different order.
// Do not check for grayscale 8bit, the roundtrip apparently fixes that. What's important
// is the content.
CPPUNIT_ASSERT(bitmap.HasGreyPaletteAny());
// CPPUNIT_ASSERT(bitmap.HasGreyPalette8Bit());
// Check that the content is valid.
CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_WHITE), access->GetColor(0, 0));
CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_WHITE), access->GetColor(0, access->Width() - 1));
CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_WHITE), access->GetColor(access->Height() - 1, 0));
CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_BLACK),
access->GetColor(access->Height() - 1, access->Width() - 1));
}
CPPUNIT_TEST_SUITE_REGISTRATION(JpegWriterTest);
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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