1 files changed, 202 insertions, 0 deletions
diff --git a/vcl/qa/cppunit/jpeg/JpegReaderTest.cxx b/vcl/qa/cppunit/jpeg/JpegReaderTest.cxx
new file mode 100644
index 000000000..0900c02d4
--- /dev/null
+++ b/vcl/qa/cppunit/jpeg/JpegReaderTest.cxx
@@ -0,0 +1,202 @@
+/* -*- 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 <bitmap/BitmapWriteAccess.hxx>
+#include <tools/stream.hxx>
+
+constexpr OUStringLiteral gaDataUrl(u"/vcl/qa/cppunit/jpeg/data/");
+
+class JpegReaderTest : public test::BootstrapFixtureBase
+{
+    OUString getFullUrl(std::u16string_view sFileName)
+    {
+        return m_directories.getURLFromSrc(gaDataUrl) + sFileName;
+    }
+
+    Graphic loadJPG(const OUString& aURL);
+
+public:
+    void testReadRGB();
+    void testReadGray();
+    void testReadCMYK();
+    void testTdf138950();
+
+    CPPUNIT_TEST_SUITE(JpegReaderTest);
+    CPPUNIT_TEST(testReadRGB);
+    CPPUNIT_TEST(testReadGray);
+    CPPUNIT_TEST(testReadCMYK);
+    CPPUNIT_TEST(testTdf138950);
+    CPPUNIT_TEST_SUITE_END();
+};
+
+static int deltaColor(BitmapColor aColor1, BitmapColor aColor2)
+{
+    int deltaR = std::abs(aColor1.GetRed() - aColor2.GetRed());
+    int deltaG = std::abs(aColor1.GetGreen() - aColor2.GetGreen());
+    int deltaB = std::abs(aColor1.GetBlue() - aColor2.GetBlue());
+
+    return std::max(std::max(deltaR, deltaG), deltaB);
+}
+
+static bool checkRect(Bitmap& rBitmap, int aLayerNumber, tools::Long nAreaHeight,
+                      tools::Long nAreaWidth, Color aExpectedColor, int nMaxDelta)
+{
+    BitmapScopedWriteAccess pAccess(rBitmap);
+
+    tools::Long nWidth = std::min(nAreaWidth, pAccess->Width());
+    tools::Long nHeight = std::min(nAreaHeight, pAccess->Height());
+
+    tools::Long firstX = 0 + aLayerNumber;
+    tools::Long firstY = 0 + aLayerNumber;
+
+    tools::Long lastX = nWidth - 1 - aLayerNumber;
+    tools::Long lastY = nHeight - 1 - aLayerNumber;
+
+    int delta;
+
+    for (tools::Long y = firstY; y <= lastY; y++)
+    {
+        Color aColorFirst = pAccess->GetPixel(y, firstX);
+        delta = deltaColor(aColorFirst, aExpectedColor);
+        if (delta > nMaxDelta)
+            return false;
+
+        Color aColorLast = pAccess->GetPixel(y, lastX);
+        delta = deltaColor(aColorLast, aExpectedColor);
+        if (delta > nMaxDelta)
+            return false;
+    }
+    for (tools::Long x = firstX; x <= lastX; x++)
+    {
+        Color aColorFirst = pAccess->GetPixel(firstY, x);
+        delta = deltaColor(aColorFirst, aExpectedColor);
+        if (delta > nMaxDelta)
+            return false;
+
+        Color aColorLast = pAccess->GetPixel(lastY, x);
+        delta = deltaColor(aColorLast, aExpectedColor);
+        if (delta > nMaxDelta)
+            return false;
+    }
+    return true;
+}
+
+static int getNumberOfImageComponents(const Graphic& rGraphic)
+{
+    GfxLink aLink = rGraphic.GetGfxLink();
+    SvMemoryStream aMemoryStream(const_cast<sal_uInt8*>(aLink.GetData()), aLink.GetDataSize(),
+                                 StreamMode::READ | StreamMode::WRITE);
+    GraphicDescriptor aDescriptor(aMemoryStream, nullptr);
+    CPPUNIT_ASSERT(aDescriptor.Detect(true));
+    return aDescriptor.GetNumberOfImageComponents();
+}
+
+Graphic JpegReaderTest::loadJPG(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;
+}
+
+void JpegReaderTest::testReadRGB()
+{
+    Graphic aGraphic = loadJPG(getFullUrl(u"JPEGTestRGB.jpeg"));
+    Bitmap aBitmap = aGraphic.GetBitmapEx().GetBitmap();
+    Size aSize = aBitmap.GetSizePixel();
+    CPPUNIT_ASSERT_EQUAL(tools::Long(12), aSize.Width());
+    CPPUNIT_ASSERT_EQUAL(tools::Long(12), aSize.Height());
+
+    int nMaxDelta = 1; // still acceptable color error
+    CPPUNIT_ASSERT(checkRect(aBitmap, 0, 8, 8, Color(0xff, 0xff, 0xff), nMaxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 1, 8, 8, Color(0xff, 0x00, 0x00), nMaxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 2, 8, 8, Color(0x00, 0xff, 0x00), nMaxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 3, 8, 8, Color(0x00, 0x00, 0xff), nMaxDelta));
+
+    CPPUNIT_ASSERT_EQUAL(3, getNumberOfImageComponents(aGraphic));
+}
+
+void JpegReaderTest::testReadGray()
+{
+    Graphic aGraphic = loadJPG(getFullUrl(u"JPEGTestGray.jpeg"));
+    Bitmap aBitmap = aGraphic.GetBitmapEx().GetBitmap();
+    Size aSize = aBitmap.GetSizePixel();
+    CPPUNIT_ASSERT_EQUAL(tools::Long(12), aSize.Width());
+    CPPUNIT_ASSERT_EQUAL(tools::Long(12), aSize.Height());
+
+    aBitmap.Convert(
+        BmpConversion::N24Bit); // convert to 24bit so we don't need to deal with palette
+
+    int nMaxDelta = 1;
+    CPPUNIT_ASSERT(checkRect(aBitmap, 0, 8, 8, Color(0xff, 0xff, 0xff), nMaxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 1, 8, 8, Color(0x36, 0x36, 0x36), nMaxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 2, 8, 8, Color(0xb6, 0xb6, 0xb6), nMaxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 3, 8, 8, Color(0x12, 0x12, 0x12), nMaxDelta));
+
+    CPPUNIT_ASSERT_EQUAL(1, getNumberOfImageComponents(aGraphic));
+}
+
+void JpegReaderTest::testReadCMYK()
+{
+    Graphic aGraphic = loadJPG(getFullUrl(u"JPEGTestCMYK.jpeg"));
+    Bitmap aBitmap = aGraphic.GetBitmapEx().GetBitmap();
+    Size aSize = aBitmap.GetSizePixel();
+    CPPUNIT_ASSERT_EQUAL(tools::Long(12), aSize.Width());
+    CPPUNIT_ASSERT_EQUAL(tools::Long(12), aSize.Height());
+
+    int maxDelta = 1;
+    CPPUNIT_ASSERT(checkRect(aBitmap, 0, 8, 8, Color(0xff, 0xff, 0xff), maxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 1, 8, 8, Color(0xff, 0x00, 0x00), maxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 2, 8, 8, Color(0x00, 0xff, 0x00), maxDelta));
+    CPPUNIT_ASSERT(checkRect(aBitmap, 3, 8, 8, Color(0x00, 0x00, 0xff), maxDelta));
+
+    CPPUNIT_ASSERT_EQUAL(4, getNumberOfImageComponents(aGraphic));
+}
+
+void JpegReaderTest::testTdf138950()
+{
+    Graphic aGraphic = loadJPG(getFullUrl(u"tdf138950.jpeg"));
+    Bitmap aBitmap = aGraphic.GetBitmapEx().GetBitmap();
+    Size aSize = aBitmap.GetSizePixel();
+    CPPUNIT_ASSERT_EQUAL(tools::Long(720), aSize.Width());
+    CPPUNIT_ASSERT_EQUAL(tools::Long(1280), aSize.Height());
+
+    Bitmap::ScopedReadAccess pReadAccess(aBitmap);
+    int nBlackCount = 0;
+    for (tools::Long nY = 0; nY < aSize.Height(); ++nY)
+    {
+        for (tools::Long nX = 0; nX < aSize.Width(); ++nX)
+        {
+            const Color aColor = pReadAccess->GetColor(nY, nX);
+            if ((aColor.GetRed() == 0x00) && (aColor.GetGreen() == 0x00)
+                && (aColor.GetBlue() == 0x00))
+                ++nBlackCount;
+        }
+    }
+
+    // Without the fix in place, this test would have failed with
+    // - Expected: 0
+    // - Actual  : 921600
+    CPPUNIT_ASSERT_EQUAL(0, nBlackCount);
+}
+
+CPPUNIT_TEST_SUITE_REGISTRATION(JpegReaderTest);
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */