add invert() tests to visualbackendtest

They already exist and are used by the unittest. And the TrackFrame
test actually appears to expect incorrect results (or otherwise pretty
much all backends implement the operation incorrectly).

Change-Id: I26867a2d1b0f01b5e836131932b422cb8823fb5b

2 files changed, 45 insertions, 10 deletions

diff --git a/vcl/backendtest/VisualBackendTest.cxx b/vcl/backendtest/VisualBackendTest.cxx
index 4110082a6985..cab225918087 100644
--- a/vcl/backendtest/VisualBackendTest.cxx
+++ b/vcl/backendtest/VisualBackendTest.cxx
@@ -90,7 +90,7 @@ class VisualBackendTestWindow : public WorkWindow
 private:
     Timer maUpdateTimer;
     std::vector<std::chrono::high_resolution_clock::time_point> mTimePoints;
-    static constexpr unsigned char gnNumberOfTests = 7;
+    static constexpr unsigned char gnNumberOfTests = 8;
     unsigned char mnTest;
     bool mbAnimate;
     ScopedVclPtr<VirtualDevice> mpVDev;
@@ -391,6 +391,43 @@ public:
         }
     }
 
+    static void testInvert(vcl::RenderContext& rRenderContext, int nWidth, int nHeight)
+    {
+        tools::Rectangle aRectangle;
+        size_t index = 0;
+
+        std::vector<tools::Rectangle> aRegions = setupRegions(2, 2, nWidth, nHeight);
+
+        aRectangle = aRegions[index++];
+        {
+            vcl::test::OutputDeviceTestRect aOutDevTest;
+            Bitmap aBitmap = aOutDevTest.setupInvert_NONE();
+            assertAndSetBackground(vcl::test::OutputDeviceTestRect::checkInvertRectangle(aBitmap), aRectangle, rRenderContext);
+            drawBitmapScaledAndCentered(aRectangle, aBitmap, rRenderContext);
+        }
+        aRectangle = aRegions[index++];
+        {
+            vcl::test::OutputDeviceTestRect aOutDevTest;
+            Bitmap aBitmap = aOutDevTest.setupInvert_N50();
+            assertAndSetBackground(vcl::test::OutputDeviceTestRect::checkInvertN50Rectangle(aBitmap), aRectangle, rRenderContext);
+            drawBitmapScaledAndCentered(aRectangle, aBitmap, rRenderContext);
+        }
+        aRectangle = aRegions[index++];
+        {
+            vcl::test::OutputDeviceTestRect aOutDevTest;
+            Bitmap aBitmap = aOutDevTest.setupInvert_TrackFrame();
+            assertAndSetBackground(vcl::test::OutputDeviceTestRect::checkInvertTrackFrameRectangle(aBitmap), aRectangle, rRenderContext);
+            drawBitmapScaledAndCentered(aRectangle, aBitmap, rRenderContext);
+        }
+        aRectangle = aRegions[index++];
+        {
+            vcl::test::OutputDeviceTestAnotherOutDev aOutDevTest;
+            Bitmap aBitmap = aOutDevTest.setupXOR();
+            assertAndSetBackground(vcl::test::OutputDeviceTestAnotherOutDev::checkXOR(aBitmap), aRectangle, rRenderContext);
+            drawBitmapScaledAndCentered(aRectangle, aBitmap, rRenderContext);
+        }
+    }
+
     virtual void Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& /*rRect*/) override
     {
         if (mnTest % gnNumberOfTests == gnNumberOfTests - 1)
@@ -487,7 +524,11 @@ public:
         }
         else if (mnTest % gnNumberOfTests == 5)
         {
-            std::vector<tools::Rectangle> aRegions = setupRegions(3, 2, nWidth, nHeight);
+            testInvert(rRenderContext, nWidth, nHeight);
+        }
+        else if (mnTest % gnNumberOfTests == 6)
+        {
+            std::vector<tools::Rectangle> aRegions = setupRegions(3, 1, nWidth, nHeight);
 
             aRectangle = aRegions[index++];
             {
@@ -498,13 +539,6 @@ public:
             }
             aRectangle = aRegions[index++];
             {
-                vcl::test::OutputDeviceTestAnotherOutDev aOutDevTest;
-                Bitmap aBitmap = aOutDevTest.setupXOR();
-                assertAndSetBackground(vcl::test::OutputDeviceTestAnotherOutDev::checkXOR(aBitmap), aRectangle, rRenderContext);
-                drawBitmapScaledAndCentered(aRectangle, aBitmap, rRenderContext);
-            }
-            aRectangle = aRegions[index++];
-            {
                 vcl::test::OutputDeviceTestGradient aOutDevTest;
                 Bitmap aBitmap = aOutDevTest.setupLinearGradient();
                 drawBitmapScaledAndCentered(aRectangle, aBitmap, rRenderContext);
diff --git a/vcl/qa/cppunit/BackendTest.cxx b/vcl/qa/cppunit/BackendTest.cxx
index 01a81c0f17f3..6dfda5d02d35 100644
--- a/vcl/qa/cppunit/BackendTest.cxx
+++ b/vcl/qa/cppunit/BackendTest.cxx
@@ -465,7 +465,8 @@ public:
 
     CPPUNIT_TEST(testDrawInvertWithRectangle);
     CPPUNIT_TEST(testDrawInvertN50WithRectangle);
-    //    CPPUNIT_TEST(testDrawInvertTrackFrameWithRectangle); TODO SKIA
+    // AFAIK this test (itself) is broken.
+    // CPPUNIT_TEST(testDrawInvertTrackFrameWithRectangle);
 
     CPPUNIT_TEST(testDrawBezierWithPolylineB2D);
     CPPUNIT_TEST(testDrawBezierAAWithPolylineB2D);