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libreoffice/vcl/qa/cppunit/BitmapExTest.cxx
Daniel Baumann 8e63e14cf6
Adding upstream version 4:25.2.3. 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-22 16:20:04 +02:00

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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 <vcl/bitmapex.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <vcl/BitmapWriteAccess.hxx>
#include <svdata.hxx>
#include <salinst.hxx>
namespace
{
class BitmapExTest : public CppUnit::TestFixture
{
void testGetPixelColor24_8();
void testGetPixelColor32();
void testTransformBitmapEx();
void testAlphaBlendWith();
void testCreateMask();
void testCombineMaskOr();
CPPUNIT_TEST_SUITE(BitmapExTest);
CPPUNIT_TEST(testGetPixelColor24_8);
CPPUNIT_TEST(testGetPixelColor32);
CPPUNIT_TEST(testTransformBitmapEx);
CPPUNIT_TEST(testAlphaBlendWith);
CPPUNIT_TEST(testCreateMask);
CPPUNIT_TEST(testCombineMaskOr);
CPPUNIT_TEST_SUITE_END();
};
void BitmapExTest::testGetPixelColor24_8()
{
Bitmap aBitmap(Size(3, 3), vcl::PixelFormat::N24_BPP);
{
BitmapScopedWriteAccess pWriteAccess(aBitmap);
pWriteAccess->Erase(Color(ColorTransparency, 0x00, 0x00, 0xFF, 0x00));
}
AlphaMask aMask(Size(3, 3));
{
BitmapScopedWriteAccess pWriteAccess(aMask);
pWriteAccess->Erase(Color(ColorTransparency, 0x00, 0xAA, 0xAA, 0xAA));
}
BitmapEx aBitmapEx(aBitmap, aMask);
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0xAA, 0x00, 0xFF, 0x00), aBitmapEx.GetPixelColor(0, 0));
}
void BitmapExTest::testGetPixelColor32()
{
// Check backend capabilities and return from the test successfully
// if the backend doesn't support 32-bit bitmap
if (!ImplGetSVData()->mpDefInst->supportsBitmap32())
return;
Bitmap aBitmap(Size(3, 3), vcl::PixelFormat::N32_BPP);
{
BitmapScopedWriteAccess pWriteAccess(aBitmap);
pWriteAccess->Erase(Color(ColorTransparency, 0xAA, 0x00, 0xFF, 0x00));
}
BitmapEx aBitmapEx(aBitmap);
CPPUNIT_ASSERT_EQUAL(Color(ColorTransparency, 0xAA, 0x00, 0xFF, 0x00),
aBitmapEx.GetPixelColor(0, 0));
}
void BitmapExTest::testTransformBitmapEx()
{
Bitmap aBitmap(Size(16, 16), vcl::PixelFormat::N24_BPP);
{
BitmapScopedWriteAccess pWriteAccess(aBitmap);
pWriteAccess->Erase(COL_WHITE);
for (int i = 0; i < 8; ++i)
{
for (int j = 0; j < 8; ++j)
{
pWriteAccess->SetPixel(i, j, COL_BLACK);
}
}
}
BitmapEx aBitmapEx(aBitmap);
basegfx::B2DHomMatrix aMatrix;
aMatrix.rotate(M_PI / 2);
BitmapEx aTransformed = aBitmapEx.TransformBitmapEx(16, 16, aMatrix);
aBitmap = aTransformed.GetBitmap();
BitmapScopedReadAccess pAccess(aBitmap);
for (int i = 0; i < 16; ++i)
{
for (int j = 0; j < 16; ++j)
{
BitmapColor aColor = pAccess->GetPixel(i, j);
std::stringstream ss;
ss << "Color is expected to be white or black, is '" << aColor.AsRGBHexString() << "'";
// Without the accompanying fix in place, this test would have failed with:
// - Expression: aColor == COL_WHITE || aColor == COL_BLACK
// - Color is expected to be white or black, is 'bfbfbf'
// i.e. smoothing introduced noise for a simple 90 deg rotation.
CPPUNIT_ASSERT_MESSAGE(ss.str(), aColor == COL_WHITE || aColor == COL_BLACK);
}
}
}
void BitmapExTest::testAlphaBlendWith()
{
AlphaMask alpha(Size(1, 1));
AlphaMask bitmap(Size(1, 1));
// Just test a handful of combinations to make sure the algorithm doesn't
// change (as happened when I did some 32-bit alpha changes)
// Note that Erase() takes a transparency value, but we get alpha values in GetPixelIndex.
alpha.Erase(64);
bitmap.Erase(64);
alpha.BlendWith(bitmap);
CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255 - 112),
BitmapScopedReadAccess(alpha)->GetPixelIndex(0, 0));
alpha.Erase(12);
bitmap.Erase(64);
alpha.BlendWith(bitmap);
CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255 - 73),
BitmapScopedReadAccess(alpha)->GetPixelIndex(0, 0));
alpha.Erase(12);
bitmap.Erase(12);
alpha.BlendWith(bitmap);
CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255 - 24),
BitmapScopedReadAccess(alpha)->GetPixelIndex(0, 0));
alpha.Erase(127);
bitmap.Erase(13);
alpha.BlendWith(bitmap);
CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255 - 134),
BitmapScopedReadAccess(alpha)->GetPixelIndex(0, 0));
alpha.Erase(255);
bitmap.Erase(255);
alpha.BlendWith(bitmap);
CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255 - 255),
BitmapScopedReadAccess(alpha)->GetPixelIndex(0, 0));
alpha.Erase(0);
bitmap.Erase(255);
alpha.BlendWith(bitmap);
CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255 - 255),
BitmapScopedReadAccess(alpha)->GetPixelIndex(0, 0));
alpha.Erase(255);
bitmap.Erase(0);
alpha.BlendWith(bitmap);
CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255 - 255),
BitmapScopedReadAccess(alpha)->GetPixelIndex(0, 0));
alpha.Erase(0);
bitmap.Erase(0);
alpha.BlendWith(bitmap);
CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255 - 0),
BitmapScopedReadAccess(alpha)->GetPixelIndex(0, 0));
}
void BitmapExTest::testCreateMask()
{
Bitmap aBitmap(Size(3, 3), vcl::PixelFormat::N24_BPP);
{
BitmapScopedWriteAccess pWriteAccess(aBitmap);
pWriteAccess->Erase(COL_WHITE);
for (int i = 0; i < 3; ++i)
pWriteAccess->SetPixel(i, i, COL_RED);
}
aBitmap = aBitmap.CreateMask(COL_RED, 1);
BitmapScopedReadAccess pAccess(aBitmap);
// the output is a greyscale palette bitmap
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(0, 0));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(0, 1));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(0, 2));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(1, 0));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(1, 1));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(1, 2));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(2, 0));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(2, 1));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(2, 2));
}
void BitmapExTest::testCombineMaskOr()
{
Bitmap aBitmap(Size(3, 3), vcl::PixelFormat::N24_BPP);
{
BitmapScopedWriteAccess pWriteAccess(aBitmap);
pWriteAccess->Erase(COL_WHITE);
for (int i = 0; i < 3; ++i)
pWriteAccess->SetPixel(1, i, COL_RED);
}
AlphaMask aAlphaBitmap(Size(3, 3));
{
BitmapScopedWriteAccess pWriteAccess(aAlphaBitmap);
pWriteAccess->Erase(COL_WHITE);
for (int i = 1; i < 3; ++i)
{
pWriteAccess->SetPixel(i, 0, COL_BLACK);
pWriteAccess->SetPixel(i, 1, COL_GRAY);
pWriteAccess->SetPixel(i, 0, Color(0xef, 0xef, 0xef));
}
}
{
AlphaMask aMask = aBitmap.CreateAlphaMask(COL_RED, 1);
BitmapScopedReadAccess pAccess(aMask);
// the output is a greyscale palette bitmap
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(0, 0));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(0, 1));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(0, 2));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(1, 0));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(1, 1));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0x00), pAccess->GetPixelIndex(1, 2));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(2, 0));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(2, 1));
CPPUNIT_ASSERT_EQUAL(sal_uInt8(0xff), pAccess->GetPixelIndex(2, 2));
}
BitmapEx aBitmapEx(aBitmap, aAlphaBitmap);
aBitmapEx.CombineMaskOr(COL_RED, 1);
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0xff, 0xff, 0xff, 0xff), aBitmapEx.GetPixelColor(0, 0));
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0x00, 0x80, 0x00, 0x00), aBitmapEx.GetPixelColor(0, 1));
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0x00, 0xff, 0xff, 0xff), aBitmapEx.GetPixelColor(0, 2));
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0xff, 0xff, 0xff, 0xff), aBitmapEx.GetPixelColor(1, 0));
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0x00, 0x80, 0x00, 0x00), aBitmapEx.GetPixelColor(1, 1));
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0x00, 0xff, 0xff, 0xff), aBitmapEx.GetPixelColor(1, 2));
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0xff, 0xff, 0xff, 0xff), aBitmapEx.GetPixelColor(2, 0));
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0x00, 0x80, 0x00, 0x00), aBitmapEx.GetPixelColor(2, 1));
CPPUNIT_ASSERT_EQUAL(Color(ColorAlpha, 0xff, 0xff, 0xff, 0xff), aBitmapEx.GetPixelColor(2, 2));
}
} // namespace
CPPUNIT_TEST_SUITE_REGISTRATION(BitmapExTest);
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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