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>
(cherry picked from commit 4992780d2bc996c111b333549314d72f6891308d)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118304
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

1 files changed, 39 insertions, 5 deletions

diff --git a/drawinglayer/source/tools/emfphelperdata.cxx b/drawinglayer/source/tools/emfphelperdata.cxx
index 23ceb6487d66..7a2007da07ba 100644
--- a/drawinglayer/source/tools/emfphelperdata.cxx
+++ b/drawinglayer/source/tools/emfphelperdata.cxx
@@ -1443,7 +1443,8 @@ 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;
@@ -1464,10 +1465,43 @@ 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;
                                 }