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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 <cppunit/TestAssert.h>
#include <cppunit/TestFixture.h>
#include <cppunit/extensions/HelperMacros.h>
#include <cppunit/plugin/TestPlugIn.h>
#include <vcl/bitmap.hxx>
#include <vcl/bitmapaccess.hxx>
#include <bitmapwriteaccess.hxx>
#include <tools/stream.hxx>
#include <vcl/graphicfilter.hxx>
#include <vcl/BitmapFilterStackBlur.hxx>
#include <BitmapSymmetryCheck.hxx>
#include <chrono>
namespace
{
constexpr bool constWriteResultBitmap(false);
constexpr bool constEnablePerformanceTest(false);
class BitmapFilterTest : public CppUnit::TestFixture
{
void testBlurCorrectness();
void testPerformance();
CPPUNIT_TEST_SUITE(BitmapFilterTest);
CPPUNIT_TEST(testBlurCorrectness);
CPPUNIT_TEST(testPerformance);
CPPUNIT_TEST_SUITE_END();
};
void BitmapFilterTest::testBlurCorrectness()
{
// Setup test bitmap
Size aSize(41, 31);
Bitmap aBitmap24Bit(aSize, 24);
ScanlineFormat scanlineFormat = ScanlineFormat::NONE;
sal_uInt16 nBPP = aBitmap24Bit.GetBitCount();
{
long aMargin1 = 1;
long aMargin2 = 3;
BitmapScopedWriteAccess aWriteAccess(aBitmap24Bit);
scanlineFormat = aWriteAccess->GetScanlineFormat();
aWriteAccess->Erase(COL_WHITE);
aWriteAccess->SetLineColor(COL_BLACK);
tools::Rectangle aRectangle1(aMargin1, aMargin1, aSize.Width() - 1 - aMargin1,
aSize.Height() - 1 - aMargin1);
tools::Rectangle aRectangle2(aMargin2, aMargin2, aSize.Width() - 1 - aMargin2,
aSize.Height() - 1 - aMargin2);
tools::Rectangle aRectangle3(aSize.Width() / 2, aSize.Height() / 2, aSize.Width() / 2,
aSize.Height() / 2);
aWriteAccess->DrawRect(aRectangle1);
aWriteAccess->DrawRect(aRectangle2);
aWriteAccess->DrawRect(aRectangle3);
}
if (constWriteResultBitmap)
{
SvFileStream aStream("~/blurBefore.png", StreamMode::WRITE | StreamMode::TRUNC);
GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
rFilter.compressAsPNG(aBitmap24Bit, aStream);
}
// Perform blur
BitmapFilterStackBlur aBlurFilter(2);
aBitmap24Bit = aBlurFilter.filter(aBitmap24Bit);
// Check the result
if (constWriteResultBitmap)
{
SvFileStream aStream("~/blurAfter.png", StreamMode::WRITE | StreamMode::TRUNC);
GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
rFilter.compressAsPNG(aBitmap24Bit, aStream);
}
// Check blurred bitmap parameters
CPPUNIT_ASSERT_EQUAL(static_cast<long>(45), aBitmap24Bit.GetSizePixel().Width());
CPPUNIT_ASSERT_EQUAL(static_cast<long>(35), aBitmap24Bit.GetSizePixel().Height());
CPPUNIT_ASSERT_EQUAL(nBPP, aBitmap24Bit.GetBitCount());
// Check that the bitmap is horizontally and vertically symmetrical
CPPUNIT_ASSERT(BitmapSymmetryCheck::check(aBitmap24Bit));
{
Bitmap::ScopedReadAccess aReadAccess(aBitmap24Bit);
CPPUNIT_ASSERT_EQUAL(scanlineFormat, aReadAccess->GetScanlineFormat());
}
}
void BitmapFilterTest::testPerformance()
{
if (!constEnablePerformanceTest)
return;
Size aSize(4000, 3000); // A rather common picture size
// Prepare bitmap
Bitmap aBigBitmap(aSize, 24);
{
long aMargin = 500;
BitmapScopedWriteAccess aWriteAccess(aBigBitmap);
aWriteAccess->Erase(COL_WHITE);
aWriteAccess->SetLineColor(COL_BLACK);
aWriteAccess->SetFillColor(COL_BLACK);
tools::Rectangle aRectangle(aMargin, aMargin, aSize.Width() - 1 - aMargin,
aSize.Height() - 1 - aMargin);
aWriteAccess->DrawRect(aRectangle);
}
int nIterations = 10;
auto start = std::chrono::high_resolution_clock::now();
for (int i = 0; i < nIterations; i++)
{
BitmapFilterStackBlur aBlurFilter(250, false); // don't extend the image
aBlurFilter.filter(aBigBitmap);
}
auto end = std::chrono::high_resolution_clock::now();
auto elapsed = (end - start) / nIterations;
if (constWriteResultBitmap)
{
std::unique_ptr<SvFileStream> pStream(
new SvFileStream("~/BlurBigPerformance.png", StreamMode::WRITE | StreamMode::TRUNC));
GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
rFilter.compressAsPNG(aBigBitmap, *pStream);
pStream.reset(new SvFileStream("~/BlurBigPerformance.txt", StreamMode::WRITE));
pStream->WriteOString("Blur average time: ");
pStream->WriteOString(OString::number(
std::chrono::duration_cast<std::chrono::milliseconds>(elapsed).count()));
pStream->WriteOString("\n");
}
}
} // namespace
CPPUNIT_TEST_SUITE_REGISTRATION(BitmapFilterTest);
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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