fix test for tdf#137413

The test tested for the topleft corner to be transparent and not black,
but the bitmap has a black outline, so the corner actually should be
black, unlike the rest of the bitmap. I have no idea how the test
could have possibly passed (and those #if tests indicate that it
correctly failed with most drawing backends). What apparently enabled
this to pass was commit 828504974d70111e, which made the drawing
use DrawTransformedBitmap() implementation in the VCL backends,
and the Cairo one apparently mishandles it. Reverting 828504974d70111e
made the test fail.
This commit fixes (and simplifies) the test.

Change-Id: I1560849d683558abbe0cde816c4505b9824a0692
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110769
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
(cherry picked from commit f52c5bea7775ac07cfacc232f0979a03bbdf9aa7)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110778

1 files changed, 5 insertions, 12 deletions

diff --git a/emfio/qa/cppunit/emf/EmfImportTest.cxx b/emfio/qa/cppunit/emf/EmfImportTest.cxx
index e8d4833e6424..e81a37d48487 100644
--- a/emfio/qa/cppunit/emf/EmfImportTest.cxx
+++ b/emfio/qa/cppunit/emf/EmfImportTest.cxx
@@ -26,7 +26,6 @@
 
 #include <drawinglayer/primitive2d/Primitive2DContainer.hxx>
 #include <drawinglayer/tools/primitive2dxmldump.hxx>
-#include <vcl/bitmapaccess.hxx>
 
 #include <memory>
 
@@ -383,19 +382,13 @@ void Test::TestPdfInEmf()
     // height was only 5cm, so it looked blurry.
     CPPUNIT_ASSERT_EQUAL(14321.0, pVectorGraphicData->getSizeHint().getY());
 
-#if !defined(WNT) && !defined(MACOSX)
-    // Hmm, manual testing on Windows looks OK.
-    BitmapEx aBitmapEx = aGraphic.GetBitmapEx();
-    AlphaMask aMask = aBitmapEx.GetAlpha();
-    Bitmap::ScopedReadAccess pAccess(aMask);
-    Color aColor(pAccess->GetPixel(0, 0));
     // Without the accompanying fix in place, this test would have failed with:
-    // - Expected: 220
+    // - Expected: 255
     // - Actual  : 0
-    // i.e. the pixel at the top left corner was entirely opaque, while it should be mostly
-    // transparent.
-    CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(220), aColor.GetBlue());
-#endif
+    // i.e. the pixel in the center was entirely opaque, while it should be transparent.
+    BitmapEx aBitmapEx = aGraphic.GetBitmapEx();
+    Size size = aBitmapEx.GetSizePixel();
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt8>(255), aBitmapEx.GetTransparency(size.Width() / 2, size.Height() / 2));
 }
 
 CPPUNIT_TEST_SUITE_REGISTRATION(Test);