Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 251 insertions, 0 deletions

diff --git a/vcl/qa/cppunit/BitmapExTest.cxx b/vcl/qa/cppunit/BitmapExTest.cxx
new file mode 100644
index 0000000000..9b40df6caf
--- /dev/null
+++ b/vcl/qa/cppunit/BitmapExTest.cxx
@@ -0,0 +1,251 @@
+/* -*- 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(Color(0xff, 0xff, 0xff));
+        for (int i = 1; i < 3; ++i)
+        {
+            pWriteAccess->SetPixel(i, 0, Color(0x00, 0x00, 0x00));
+            pWriteAccess->SetPixel(i, 1, Color(0x80, 0x80, 0x80));
+            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: */