Fix dotted line drawing for GDI device driver

When GDI device driver draws a dotted line, it also clip the line
into the device context's bound before drawing. This CL includes
a couple fixes:

-- When this driver is used for EMF drawing, the drawing is not
bound to the device context so clipping is not needed;
-- Transformation needs to be applied before clipping since the
transformation may move the line into the bound;
-- While checking for out-of-bound flags, bit operations are needed
to make sure the discarded line is completely out of bound, not
partially inside the bound;

BUG=chromium:539533

Review-Url: https://codereview.chromium.org/2562533002

1 files changed, 2 insertions, 5 deletions

diff --git a/core/fxge/win32/win32_int.h b/core/fxge/win32/win32_int.h
index fa1cc6830e..ae090b72d3 100644
--- a/core/fxge/win32/win32_int.h
+++ b/core/fxge/win32/win32_int.h
@@ -152,11 +152,7 @@ class CGdiDeviceDriver : public IFX_RenderDeviceDriver {
   bool GetClipBox(FX_RECT* pRect) override;
   void* GetPlatformSurface() const override;
 
-  void DrawLine(FX_FLOAT x1,
-                FX_FLOAT y1,
-                FX_FLOAT x2,
-                FX_FLOAT y2,
-                const CFX_Matrix* pMatrix);
+  void DrawLine(FX_FLOAT x1, FX_FLOAT y1, FX_FLOAT x2, FX_FLOAT y2);
 
   bool GDI_SetDIBits(CFX_DIBitmap* pBitmap,
                      const FX_RECT* pSrcRect,
@@ -177,6 +173,7 @@ class CGdiDeviceDriver : public IFX_RenderDeviceDriver {
                           uint32_t flags);
 
   HDC m_hDC;
+  bool m_bMetafileDCType;
   int m_Width;
   int m_Height;
   int m_nBitsPerPixel;