1 files changed, 286 insertions, 0 deletions
diff --git a/vcl/qa/cppunit/bitmaprender/BitmapRenderTest.cxx b/vcl/qa/cppunit/bitmaprender/BitmapRenderTest.cxx
new file mode 100644
index 000000000..26c1136cb
--- /dev/null
+++ b/vcl/qa/cppunit/bitmaprender/BitmapRenderTest.cxx
@@ -0,0 +1,286 @@
+/* -*- 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 <test/bootstrapfixture.hxx>
+
+#include <vcl/virdev.hxx>
+#include <vcl/BitmapReadAccess.hxx>
+#include <vcl/svapp.hxx>
+
+#include <tools/stream.hxx>
+
+#include <vcl/graphicfilter.hxx>
+#include <vcl/filter/PngImageReader.hxx>
+
+#include <svdata.hxx>
+#include <salinst.hxx>
+
+constexpr OUStringLiteral gaDataUrl = u"/vcl/qa/cppunit/bitmaprender/data/";
+
+class BitmapRenderTest : public test::BootstrapFixture
+{
+    OUString getFullUrl(std::u16string_view sFileName)
+    {
+        return m_directories.getURLFromSrc(gaDataUrl) + sFileName;
+    }
+
+public:
+    BitmapRenderTest()
+        : BootstrapFixture(true, false)
+    {
+    }
+
+    void testTdf104141();
+    void testTdf113918();
+    void testDrawAlphaBitmapEx();
+    void testAlphaVirtualDevice();
+    void testTdf116888();
+
+    CPPUNIT_TEST_SUITE(BitmapRenderTest);
+    CPPUNIT_TEST(testTdf104141);
+    CPPUNIT_TEST(testTdf113918);
+    CPPUNIT_TEST(testDrawAlphaBitmapEx);
+    CPPUNIT_TEST(testAlphaVirtualDevice);
+    CPPUNIT_TEST(testTdf116888);
+
+    CPPUNIT_TEST_SUITE_END();
+};
+
+void BitmapRenderTest::testTdf104141()
+{
+    ScopedVclPtrInstance<VirtualDevice> pVDev;
+    pVDev->SetOutputSizePixel(Size(400, 400));
+    pVDev->SetBackground(Wallpaper(COL_GREEN));
+    pVDev->Erase();
+
+    // Load animated GIF and draw it on green background
+    GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
+    Graphic aGraphic;
+    const OUString aURL(getFullUrl(u"tdf104141.gif"));
+    SvFileStream aFileStream(aURL, StreamMode::READ);
+    ErrCode bResult = rFilter.ImportGraphic(aGraphic, aURL, aFileStream);
+    CPPUNIT_ASSERT_EQUAL(ERRCODE_NONE, bResult);
+    BitmapEx aBitmap = aGraphic.GetBitmapEx();
+    pVDev->DrawBitmapEx(Point(20, 20), aBitmap);
+
+    // Check drawing results: ensure that it contains transparent
+    // (greenish) pixels
+    const Color aColor = pVDev->GetPixel(Point(21, 21));
+    CPPUNIT_ASSERT(aColor.GetGreen() > 10 * aColor.GetRed());
+    CPPUNIT_ASSERT(aColor.GetGreen() > 10 * aColor.GetBlue());
+}
+
+void BitmapRenderTest::testTdf113918()
+{
+    ScopedVclPtrInstance<VirtualDevice> pVDev;
+    pVDev->SetOutputSizePixel(Size(2480, 3508));
+    pVDev->SetBackground(Wallpaper(COL_GREEN));
+    pVDev->Erase();
+
+    GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
+    Graphic aGraphic;
+    const OUString aURL(getFullUrl(u"tdf113918.png"));
+    SvFileStream aFileStream(aURL, StreamMode::READ);
+    ErrCode bResult = rFilter.ImportGraphic(aGraphic, aURL, aFileStream);
+    CPPUNIT_ASSERT_EQUAL(ERRCODE_NONE, bResult);
+    BitmapEx aBitmap = aGraphic.GetBitmapEx();
+    pVDev->DrawBitmapEx(Point(0, 0), aBitmap);
+
+    // Ensure that image is drawn with white background color from palette
+    CPPUNIT_ASSERT_EQUAL(COL_WHITE, pVDev->GetPixel(Point(21, 21)));
+
+    // Ensure that image is drawn with gray text color from palette
+    const Color aColor = pVDev->GetPixel(Point(1298, 1368));
+    CPPUNIT_ASSERT_EQUAL(aColor.GetGreen(), aColor.GetRed());
+    CPPUNIT_ASSERT_EQUAL(aColor.GetGreen(), aColor.GetBlue());
+    CPPUNIT_ASSERT(aColor.GetGreen() > 100);
+}
+
+#if defined(_WIN32) || defined(IOS)
+
+namespace
+{
+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);
+}
+}
+
+#endif
+
+void BitmapRenderTest::testDrawAlphaBitmapEx()
+{
+// TODO: This unit test is not executed for macOS unless bitmap scaling is implemented
+#ifndef MACOSX
+    if (getDefaultDeviceBitCount() < 24)
+        return;
+    ScopedVclPtrInstance<VirtualDevice> pVDev;
+    pVDev->SetOutputSizePixel(Size(8, 8));
+    pVDev->SetBackground(Wallpaper(COL_WHITE));
+    pVDev->Erase();
+
+    CPPUNIT_ASSERT_EQUAL(COL_WHITE, pVDev->GetPixel(Point(0, 0)));
+    CPPUNIT_ASSERT_EQUAL(COL_WHITE, pVDev->GetPixel(Point(1, 1)));
+    CPPUNIT_ASSERT_EQUAL(COL_WHITE, pVDev->GetPixel(Point(2, 2)));
+
+    SvFileStream aFileStream(getFullUrl(u"ImageRGBA.png"), StreamMode::READ);
+
+    vcl::PngImageReader aPngReader(aFileStream);
+    BitmapEx aBitmapEx;
+    aPngReader.read(aBitmapEx);
+
+    // Check backend capabilities, if the backend support 32-bit bitmap
+    if (ImplGetSVData()->mpDefInst->supportsBitmap32())
+    {
+        CPPUNIT_ASSERT_EQUAL(vcl::PixelFormat::N32_BPP, aBitmapEx.GetBitmap().getPixelFormat());
+    }
+    else
+    {
+        CPPUNIT_ASSERT_EQUAL(vcl::PixelFormat::N24_BPP, aBitmapEx.GetBitmap().getPixelFormat());
+        CPPUNIT_ASSERT_EQUAL(true, aBitmapEx.IsAlpha());
+        CPPUNIT_ASSERT_EQUAL(vcl::PixelFormat::N8_BPP, aBitmapEx.GetAlpha().getPixelFormat());
+    }
+
+    // Check the bitmap has pixels we expect
+    CPPUNIT_ASSERT_EQUAL(Color(ColorTransparency, 0xFF, 0x00, 0x00, 0x00),
+                         aBitmapEx.GetPixelColor(0, 0));
+    CPPUNIT_ASSERT_EQUAL(Color(ColorTransparency, 0x00, 0xFF, 0xFF, 0x00),
+                         aBitmapEx.GetPixelColor(1, 1));
+    CPPUNIT_ASSERT_EQUAL(Color(ColorTransparency, 0x7F, 0x00, 0xFF, 0x00),
+                         aBitmapEx.GetPixelColor(2, 2));
+
+    pVDev->DrawBitmapEx(Point(), aBitmapEx);
+
+    CPPUNIT_ASSERT_EQUAL(Color(0xFF, 0xFF, 0xFF), pVDev->GetPixel(Point(0, 0)));
+    CPPUNIT_ASSERT_EQUAL(Color(0xFF, 0xFF, 0x00), pVDev->GetPixel(Point(1, 1)));
+
+#if defined(_WIN32) || defined(MACOSX) || defined(IOS)
+    // sometimes on Windows we get rounding error in blending so let's ignore this on Windows for now.
+    CPPUNIT_ASSERT_LESS(2, deltaColor(Color(0x7F, 0xFF, 0x7F), pVDev->GetPixel(Point(2, 2))));
+#else
+    CPPUNIT_ASSERT_EQUAL(Color(0x7F, 0xFF, 0x7F), pVDev->GetPixel(Point(2, 2)));
+#endif
+#endif
+}
+
+void BitmapRenderTest::testAlphaVirtualDevice()
+{
+// TODO: This unit test is not executed for macOS unless bitmap scaling is implemented
+#ifndef MACOSX
+    // Create an alpha virtual device
+    ScopedVclPtr<VirtualDevice> pAlphaVirtualDevice(VclPtr<VirtualDevice>::Create(
+        *Application::GetDefaultDevice(), DeviceFormat::DEFAULT, DeviceFormat::DEFAULT));
+
+    // Set it up
+    pAlphaVirtualDevice->SetOutputSizePixel(Size(4, 4));
+    pAlphaVirtualDevice->SetBackground(Wallpaper(COL_TRANSPARENT));
+    pAlphaVirtualDevice->Erase();
+
+    // Get a BitmapEx from the VirDev -> Colors should have alpha
+    BitmapEx aBitmap = pAlphaVirtualDevice->GetBitmapEx(Point(), Size(4, 4));
+    CPPUNIT_ASSERT_EQUAL(tools::Long(4), aBitmap.GetSizePixel().Width());
+    CPPUNIT_ASSERT_EQUAL(tools::Long(4), aBitmap.GetSizePixel().Height());
+    Color aColor = aBitmap.GetPixelColor(1, 1);
+    CPPUNIT_ASSERT_EQUAL(COL_TRANSPARENT, aColor);
+
+    // Draw an opaque pixel to the VirDev
+    pAlphaVirtualDevice->DrawPixel(Point(1, 1), Color(0x0022ff55));
+
+    aColor = pAlphaVirtualDevice->GetPixel(Point(1, 1));
+    // Read back the opaque pixel
+#if defined _WIN32
+    CPPUNIT_ASSERT_LESS(6, deltaColor(Color(0x0022ff55), aColor));
+#else
+    CPPUNIT_ASSERT_EQUAL(Color(0x0022ff55), aColor);
+#endif
+
+    // Read back the BitmapEx and check the opaque pixel
+    aBitmap = pAlphaVirtualDevice->GetBitmapEx(Point(), Size(4, 4));
+    CPPUNIT_ASSERT_EQUAL(tools::Long(4), aBitmap.GetSizePixel().Width());
+    CPPUNIT_ASSERT_EQUAL(tools::Long(4), aBitmap.GetSizePixel().Height());
+
+    aColor = aBitmap.GetPixelColor(1, 1);
+#if defined _WIN32
+    CPPUNIT_ASSERT_LESS(6, deltaColor(Color(0x0022ff55), aColor));
+#else
+    CPPUNIT_ASSERT_EQUAL(Color(0x0022ff55), aColor);
+#endif
+
+    // Draw an semi-transparent pixel
+    pAlphaVirtualDevice->DrawPixel(Point(0, 0), Color(ColorTransparency, 0x44, 0x22, 0xff, 0x55));
+
+    aColor = pAlphaVirtualDevice->GetPixel(Point(0, 0));
+    // Read back the semi-transparent pixel
+#if defined _WIN32
+    CPPUNIT_ASSERT_LESS(6, deltaColor(Color(ColorTransparency, 0x4422FF55), aColor));
+#else
+    CPPUNIT_ASSERT_EQUAL(Color(ColorTransparency, 0x4422FF55), aColor);
+#endif
+
+    // Read back the BitmapEx and check the semi-transparent pixel
+    aBitmap = pAlphaVirtualDevice->GetBitmapEx(Point(), Size(4, 4));
+    CPPUNIT_ASSERT_EQUAL(tools::Long(4), aBitmap.GetSizePixel().Width());
+    CPPUNIT_ASSERT_EQUAL(tools::Long(4), aBitmap.GetSizePixel().Height());
+
+    aColor = aBitmap.GetPixelColor(0, 0);
+#if defined _WIN32
+    CPPUNIT_ASSERT_LESS(6, deltaColor(Color(ColorTransparency, 0x4422FF55), aColor));
+#else
+    CPPUNIT_ASSERT_EQUAL(Color(ColorTransparency, 0x4422FF55), aColor);
+#endif
+#endif
+}
+
+void BitmapRenderTest::testTdf116888()
+{
+    // The image is a 8bit image with a non-grayscale palette. In OpenGL mode
+    // pdf export of the image was broken, because OpenGLSalBitmap::ReadTexture()
+    // didn't handle 8bit non-grayscale and moreover OpenGLSalBitmap::AcquireBuffer()
+    // didn't properly release mpUserBuffer after ReadTexture() failure.
+    GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
+    Graphic aGraphic;
+    const OUString aURL(getFullUrl(u"tdf116888.gif"));
+    SvFileStream aFileStream(aURL, StreamMode::READ);
+    ErrCode bResult = rFilter.ImportGraphic(aGraphic, aURL, aFileStream);
+    CPPUNIT_ASSERT_EQUAL(ERRCODE_NONE, bResult);
+    Bitmap aBitmap = aGraphic.GetBitmapEx().GetBitmap();
+    CPPUNIT_ASSERT(!aBitmap.IsEmpty());
+    aBitmap.Scale(0.8, 0.8); // This scaling discards mpUserData,
+    Bitmap::ScopedReadAccess pAccess(aBitmap); // forcing ReadTexture() here.
+    // Check that there is mpUserBuffer content.
+    CPPUNIT_ASSERT(pAccess);
+    const ScanlineFormat eFormat = pAccess->GetScanlineFormat();
+    CPPUNIT_ASSERT_EQUAL(ScanlineFormat::N8BitPal, eFormat);
+    CPPUNIT_ASSERT(!aBitmap.HasGreyPaletteAny());
+    // HACK: Some rendering backends change white to #FEFEFE while scaling for some reason.
+    // That is pretty much white too in practice, so adjust for that.
+    BitmapColor white(COL_WHITE);
+    if (pAccess->GetColor(0, 0) == Color(0xfe, 0xfe, 0xfe))
+        white = Color(0xfe, 0xfe, 0xfe);
+    // Check that the image contents are also valid.
+    CPPUNIT_ASSERT_EQUAL(white, pAccess->GetColor(0, 0));
+    CPPUNIT_ASSERT_EQUAL(white, pAccess->GetColor(0, pAccess->Width() - 1));
+    CPPUNIT_ASSERT_EQUAL(white, pAccess->GetColor(pAccess->Height() - 1, 0));
+    CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_BLACK),
+                         pAccess->GetColor(pAccess->Height() - 1, pAccess->Width() - 1));
+}
+
+CPPUNIT_TEST_SUITE_REGISTRATION(BitmapRenderTest);
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */