vcl/backendtest/outputdevice/polypolygon.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/outputdevice.hxx>
  12
  13 namespace vcl::test
  14 {
  15 namespace
  16 {
  17 tools::Polygon createPolygonOffset(tools::Rectangle const& rRect, int nOffset, int nFix = 0)
  18 {
  19     // Note: According to https://lists.freedesktop.org/archives/libreoffice/2019-November/083709.html
  20     // filling polygons always skips the right-most and bottom-most pixels, in order to avoid
  21     // overlaps when drawing adjacent polygons. Specifying nFix = 1 allows to visually compensate
  22     // for this by making the polygon explicitly larger.
  23     tools::Polygon aPolygon(4);
  24     aPolygon.SetPoint(Point(rRect.Left() + nOffset, rRect.Top() + nOffset), 0);
  25     aPolygon.SetPoint(Point(rRect.Right() - nOffset + nFix, rRect.Top() + nOffset), 1);
  26     aPolygon.SetPoint(Point(rRect.Right() - nOffset + nFix, rRect.Bottom() - nOffset + nFix), 2);
  27     aPolygon.SetPoint(Point(rRect.Left() + nOffset, rRect.Bottom() - nOffset + nFix), 3);
  28     aPolygon.Optimize(PolyOptimizeFlags::CLOSE);
  29     return aPolygon;
  30 }
  31
  32 } // end anonymous namespace
  33
  34 Bitmap OutputDeviceTestPolyPolygon::setupRectangle(bool bEnableAA)
  35 {
  36     initialSetup(13, 13, constBackgroundColor, bEnableAA);
  37
  38     mpVirtualDevice->SetLineColor(constLineColor);
  39     mpVirtualDevice->SetFillColor();
  40
  41     tools::PolyPolygon aPolyPolygon(2);
  42     aPolyPolygon.Insert(createPolygonOffset(maVDRectangle, 2));
  43     aPolyPolygon.Insert(createPolygonOffset(maVDRectangle, 5));
  44
  45     mpVirtualDevice->DrawPolyPolygon(aPolyPolygon);
  46
  47     return mpVirtualDevice->GetBitmap(maVDRectangle.TopLeft(), maVDRectangle.GetSize());
  48 }
  49
  50 Bitmap OutputDeviceTestPolyPolygon::setupFilledRectangle(bool useLineColor)
  51 {
  52     initialSetup(13, 13, constBackgroundColor);
  53
  54     if (useLineColor)
  55         mpVirtualDevice->SetLineColor(constLineColor);
  56     else
  57         mpVirtualDevice->SetLineColor();
  58     mpVirtualDevice->SetFillColor(constFillColor);
  59
  60     tools::PolyPolygon aPolyPolygon(1);
  61     aPolyPolygon.Insert(createPolygonOffset(maVDRectangle, 2, useLineColor ? 0 : 1));
  62
  63     mpVirtualDevice->DrawPolyPolygon(aPolyPolygon);
  64
  65     return mpVirtualDevice->GetBitmap(maVDRectangle.TopLeft(), maVDRectangle.GetSize());
  66 }
  67
  68 } // end namespace vcl::test
  69
  70 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */