drawinglayer/qa/unit/vclpixelprocessor2d.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  */
  10
  11 #include <test/bootstrapfixture.hxx>
  12
  13 #include <vcl/virdev.hxx>
  14 #include <vcl/BitmapReadAccess.hxx>
  15 #include <vcl/graphicfilter.hxx>
  16 #include <tools/stream.hxx>
  17 #include <drawinglayer/geometry/viewinformation2d.hxx>
  18 #include <drawinglayer/primitive2d/fillgradientprimitive2d.hxx>
  19 #include <drawinglayer/processor2d/baseprocessor2d.hxx>
  20 #include <drawinglayer/processor2d/processorfromoutputdevice.hxx>
  21
  22 using namespace drawinglayer;
  23
  24 class VclPixelProcessor2DTest : public test::BootstrapFixture
  25 {
  26     // if enabled - check the result images with:
  27     // "xdg-open ./workdir/CppunitTest/drawinglayer_processors.test.core/"
  28     static constexpr const bool mbExportBitmap = false;
  29
  30     void exportDevice(const OUString& filename, const VclPtr<VirtualDevice>& device)
  31     {
  32         if (mbExportBitmap)
  33         {
  34             BitmapEx aBitmapEx(device->GetBitmapEx(Point(0, 0), device->GetOutputSizePixel()));
  35             SvFileStream aStream(filename, StreamMode::WRITE | StreamMode::TRUNC);
  36             GraphicFilter::GetGraphicFilter().compressAsPNG(aBitmapEx, aStream);
  37         }
  38     }
  39
  40 public:
  41     VclPixelProcessor2DTest()
  42         : BootstrapFixture(true, false)
  43     {
  44     }
  45
  46     // Test that drawing only a part of a gradient draws the proper part of it.
  47     void testTdf139000()
  48     {
  49         ScopedVclPtr<VirtualDevice> device = VclPtr<VirtualDevice>::Create(DeviceFormat::DEFAULT);
  50         device->SetOutputSizePixel(Size(100, 200));
  51         device->SetBackground(Wallpaper(COL_RED));
  52         device->Erase();
  53
  54         drawinglayer::geometry::ViewInformation2D view;
  55         std::unique_ptr<processor2d::BaseProcessor2D> processor(
  56             processor2d::createBaseProcessor2DFromOutputDevice(*device, view));
  57         CPPUNIT_ASSERT(processor);
  58
  59         basegfx::B2DRange definitionRange(0, 0, 100, 200);
  60         basegfx::B2DRange outputRange(0, 100, 100, 200); // Paint only lower half of the gradient.
  61         attribute::FillGradientAttribute attributes(attribute::GradientStyle::Linear, 0, 0, 0, 0,
  62                                                     COL_WHITE.getBColor(), COL_BLACK.getBColor());
  63         rtl::Reference<primitive2d::FillGradientPrimitive2D> gradientPrimitive(
  64             new primitive2d::FillGradientPrimitive2D(outputRange, definitionRange, attributes));
  65         primitive2d::Primitive2DContainer primitives;
  66         primitives.push_back(primitive2d::Primitive2DReference(gradientPrimitive));
  67         processor->process(primitives);
  68
  69         exportDevice("test-tdf139000.png", device);
  70         Bitmap bitmap = device->GetBitmap(Point(), device->GetOutputSizePixel());
  71         Bitmap::ScopedReadAccess access(bitmap);
  72         // The upper half should keep its red background color.
  73         CPPUNIT_ASSERT_EQUAL(BitmapColor(COL_RED), access->GetColor(Point(0, 99)));
  74         // First line of the gradient should not be the start color, but something halfway.
  75         CPPUNIT_ASSERT_LESS(static_cast<sal_uInt16>(16),
  76                             access->GetColor(Point(0, 100)).GetColorError(COL_GRAY));
  77         // Last line of the gradient should be the end color, or close.
  78         CPPUNIT_ASSERT_LESS(static_cast<sal_uInt16>(16),
  79                             access->GetColor(Point(0, 199)).GetColorError(COL_BLACK));
  80     }
  81
  82     CPPUNIT_TEST_SUITE(VclPixelProcessor2DTest);
  83     CPPUNIT_TEST(testTdf139000);
  84     CPPUNIT_TEST_SUITE_END();
  85 };
  86
  87 CPPUNIT_TEST_SUITE_REGISTRATION(VclPixelProcessor2DTest);
  88
  89 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */