EMF+ tdf#142941 Fixes for SrcRect in DrawImagePoints

The SrcRect could be specified outside of source bitmap.
In such cases the Destination bitmap should be displayed as shifted
(eg. if position is negative), and scaled properly.
Change-Id: Ied6d339703999faaae061802ef6a28e190d5a176

Change-Id: Ia9772ced282684c2c94a261d97d30b53921d6171
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118345
Tested-by: Jenkins
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>

3 files changed, 73 insertions, 5 deletions

diff --git a/drawinglayer/source/tools/emfphelperdata.cxx b/drawinglayer/source/tools/emfphelperdata.cxx
index dff19563002d..2568cedb453a 100644
--- a/drawinglayer/source/tools/emfphelperdata.cxx
+++ b/drawinglayer/source/tools/emfphelperdata.cxx
@@ -1441,7 +1441,8 @@ namespace emfplushelper
                             EMFPImage& image = *static_cast<EMFPImage *>(maEMFPObjects[flags & 0xff].get());
                             float sx, sy, sw, sh;
                             ReadRectangle(rMS, sx, sy, sw, sh);
-                            ::tools::Rectangle aSource(Point(sx, sy), Size(sw, sh));
+
+                            ::tools::Rectangle aSource(Point(sx, sy), Size(sw + 1, sh + 1));
                             SAL_INFO("drawinglayer.emf", "EMF+\t " << (type == EmfPlusRecordTypeDrawImagePoints ? "DrawImagePoints" : "DrawImage") << " source rectangle: " << sx << "," << sy << " " << sw << "x" << sh);
                             ::basegfx::B2DPoint aDstPoint;
                             ::basegfx::B2DSize aDstSize;
@@ -1462,10 +1463,43 @@ namespace emfplushelper
                                     ReadPoint(rMS, x2, y2, flags); // upper-right
                                     ReadPoint(rMS, x3, y3, flags); // lower-left
 
-                                    SAL_INFO("drawinglayer.emf", "EMF+\t destination points: P1:" << x1 << "," << y1 << " P2:" << x2 << "," << y2 << " P3:" << x3 << "," << y3);
-
-                                    aDstPoint = ::basegfx::B2DPoint(x1, y1);
-                                    aDstSize = ::basegfx::B2DSize(x2 - x1, y3 - y1);
+                                    SAL_INFO("drawinglayer.emf",
+                                             "EMF+\t destination points: " << x1 << "," << y1 << " "
+                                                                           << x2 << "," << y2 << " "
+                                                                           << x3 << "," << y3);
+                                    float xDstShift = x1;
+                                    float yDstShift = y2;
+                                    float xDstSize = x2 - x1;
+                                    float yDstSize = y3 - y1;
+                                    if (image.type == ImageDataTypeBitmap)
+                                    {
+                                        const Size aSize(image.graphic.GetBitmapEx().GetSizePixel());
+                                        if (sx < 0)
+                                        {
+                                            // If src position is negative then we need shift image to right
+                                            xDstShift = xDstShift + ((-sx) / sw) * (x2 - x1);
+                                            if (sx + sw <= aSize.Width())
+                                                xDstSize = ((sw + sx) / sw) * xDstSize;
+                                            else
+                                                xDstSize = (aSize.Width() / sw) * xDstSize;
+                                        }
+                                        else if (sx + sw > aSize.Width())
+                                            // If the src image is smaller that what we want to cut, then we need to scale down
+                                            xDstSize = ((aSize.Width() - sx) / sw) * xDstSize;
+
+                                        if (sy < 0)
+                                        {
+                                            yDstShift = yDstShift + ((-sy) / sh) * (y3 - y1);
+                                            if (sy + sh <= aSize.Height())
+                                                yDstSize = ((sh + sy) / sh) * yDstSize;
+                                            else
+                                                yDstSize = (aSize.Height() / sh) * yDstSize;
+                                        }
+                                        else if (sy + sh > aSize.Height())
+                                            yDstSize = ((aSize.Height() - sy) / sh) * yDstSize;
+                                    }
+                                    aDstPoint = ::basegfx::B2DPoint(xDstShift, yDstShift);
+                                    aDstSize = ::basegfx::B2DSize(xDstSize, yDstSize);
                                     fShearX = x3 - x1;
                                     fShearY = y2 - y1;
                                 }
diff --git a/emfio/qa/cppunit/emf/EmfImportTest.cxx b/emfio/qa/cppunit/emf/EmfImportTest.cxx
index 63e1d575803b..c60a4870f6f1 100644
--- a/emfio/qa/cppunit/emf/EmfImportTest.cxx
+++ b/emfio/qa/cppunit/emf/EmfImportTest.cxx
@@ -46,6 +46,7 @@ class Test : public test::BootstrapFixture, public XmlTestTools, public unotest:
     uno::Reference<lang::XComponent> mxComponent;
 
     void testPolyPolygon();
+    void TestDrawImagePointsTypeBitmap();
     void TestDrawString();
     void TestDrawStringAlign();
     void TestDrawStringTransparent();
@@ -87,6 +88,7 @@ public:
 
     CPPUNIT_TEST_SUITE(Test);
     CPPUNIT_TEST(testPolyPolygon);
+    CPPUNIT_TEST(TestDrawImagePointsTypeBitmap);
     CPPUNIT_TEST(TestDrawString);
     CPPUNIT_TEST(TestDrawStringAlign);
     CPPUNIT_TEST(TestDrawStringTransparent);
@@ -190,6 +192,38 @@ void Test::testPolyPolygon()
 
 }
 
+void Test::TestDrawImagePointsTypeBitmap()
+{
+    // tdf#142941 EMF+ file with ObjectTypeImage, FillRects, DrawImagePoints ,records
+    // The test is checking the position of displaying bitmap with too large SrcRect
+
+    Primitive2DSequence aSequence
+        = parseEmf(u"/emfio/qa/cppunit/emf/data/TestDrawImagePointsTypeBitmap.emf");
+    CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(aSequence.getLength()));
+    drawinglayer::Primitive2dXmlDump dumper;
+    xmlDocUniquePtr pDocument
+        = dumper.dumpAndParse(comphelper::sequenceToContainer<Primitive2DContainer>(aSequence));
+    CPPUNIT_ASSERT(pDocument);
+
+    assertXPath(pDocument, "/primitive2D/metafile/transform/polypolygoncolor", "color", "#0080ff");
+    assertXPath(pDocument, "/primitive2D/metafile/transform/bitmap", "xy11", "5346");
+    assertXPath(pDocument, "/primitive2D/metafile/transform/bitmap", "xy12", "0");
+    assertXPath(pDocument, "/primitive2D/metafile/transform/bitmap", "xy13", "5558");
+    assertXPath(pDocument, "/primitive2D/metafile/transform/bitmap", "xy21", "0");
+    assertXPath(pDocument, "/primitive2D/metafile/transform/bitmap", "xy22", "4716");
+    assertXPath(pDocument, "/primitive2D/metafile/transform/bitmap", "xy23", "5564");
+    assertXPath(
+        pDocument, "/primitive2D/metafile/transform/bitmap/data[2]", "row",
+        "020202,ffffff,ffffff,ffffff,fefefe,ffffff,ffffff,fefefe,ffffff,ffffff,f8f8f8,ffffff,"
+        "fdfdfd,ffffff,ffffff,fdfdfd,ffffff,ffffff,ffffff,fbfbfb,010101,ffffff,fefefe,ffffff,"
+        "ffffff,fbfbfb,ffffff,fdfdfd,fcfcfc,fdfdfd,ffffff,ffffff,ffffff,ffffff,ffffff,ffffff,"
+        "ffffff,ffffff,ffffff,ffffff,020202,fdfdfd,ffffff,ffffff,fefefe,ffffff,ffffff,ffffff,"
+        "ffffff,fbfbfb,fefefe,ffffff,fcfcfc,ffffff,fdfdfd,ffffff,ffffff,ffffff,ffffff,fbfbfb,"
+        "010101,ffffff,fefefe,ffffff,ffffff,ffffff,fcfcfc,ffffff,fafafa,ffffff,ffffff,fefefe,"
+        "ffffff,fdfdfd,fefefe,fefefe,ffffff,ffffff,fdfdfd,fffbfb,1e0000,8f4347,b13a3e,b82d32,"
+        "bb3438,b73237,b63338,b33035,b63338");
+}
+
 void Test::TestDrawString()
 {
 #if HAVE_MORE_FONTS
diff --git a/emfio/qa/cppunit/emf/data/TestDrawImagePointsTypeBitmap.emf b/emfio/qa/cppunit/emf/data/TestDrawImagePointsTypeBitmap.emf
new file mode 100644
index 000000000000..291052a165a8
--- /dev/null
+++ b/emfio/qa/cppunit/emf/data/TestDrawImagePointsTypeBitmap.emf