vcl/backendtest/outputdevice/polypolygon_b2d.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 basegfx::B2DPolygon 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     basegfx::B2DPolygon aPolygon{
  24         basegfx::B2DPoint(rRect.Left() + nOffset, rRect.Top() + nOffset),
  25         basegfx::B2DPoint(rRect.Right() - nOffset + nFix, rRect.Top() + nOffset),
  26         basegfx::B2DPoint(rRect.Right() - nOffset + nFix, rRect.Bottom() - nOffset + nFix),
  27         basegfx::B2DPoint(rRect.Left() + nOffset, rRect.Bottom() - nOffset + nFix),
  28     };
  29     aPolygon.setClosed(true);
  30     return aPolygon;
  31 }
  32
  33 } // end anonymous namespace
  34
  35 Bitmap OutputDeviceTestPolyPolygonB2D::setupRectangle(bool bEnableAA)
  36 {
  37     initialSetup(13, 13, constBackgroundColor, bEnableAA);
  38
  39     mpVirtualDevice->SetLineColor(constLineColor);
  40     mpVirtualDevice->SetFillColor();
  41
  42     basegfx::B2DPolyPolygon aPolyPolygon;
  43     aPolyPolygon.append(createPolygonOffset(maVDRectangle, 2));
  44     aPolyPolygon.append(createPolygonOffset(maVDRectangle, 5));
  45
  46     mpVirtualDevice->DrawPolyPolygon(aPolyPolygon);
  47
  48     return mpVirtualDevice->GetBitmap(maVDRectangle.TopLeft(), maVDRectangle.GetSize());
  49 }
  50
  51 Bitmap OutputDeviceTestPolyPolygonB2D::setupFilledRectangle(bool useLineColor)
  52 {
  53     initialSetup(13, 13, constBackgroundColor);
  54
  55     if (useLineColor)
  56         mpVirtualDevice->SetLineColor(constLineColor);
  57     else
  58         mpVirtualDevice->SetLineColor();
  59     mpVirtualDevice->SetFillColor(constFillColor);
  60
  61     basegfx::B2DPolyPolygon aPolyPolygon(
  62         createPolygonOffset(maVDRectangle, 2, useLineColor ? 0 : 1));
  63
  64     mpVirtualDevice->DrawPolyPolygon(aPolyPolygon);
  65
  66     return mpVirtualDevice->GetBitmap(maVDRectangle.TopLeft(), maVDRectangle.GetSize());
  67 }
  68 } // end namespace vcl::test
  69
  70 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */