Replace more static casts in FWL (part 3)

xfa/include/fxgraphics/fx_graphics.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef XFA_INCLUDE_FXGRAPHICS_FX_GRAPHICS_H_
 #define XFA_INCLUDE_FXGRAPHICS_FX_GRAPHICS_H_
 
 #include "core/include/fpdfapi/fpdf_pageobj.h"
@@ skipping 194 matching lines @@
                   CFX_Matrix* matrix = NULL);
 
   FX_ERR DrawImage(CFX_DIBSource* source,
                    const CFX_PointF& point,
                    CFX_Matrix* matrix = NULL);
 
   FX_ERR StretchImage(CFX_DIBSource* source,
                       const CFX_RectF& rect,
                       CFX_Matrix* matrix = NULL);
 
-  FX_ERR ConcatMatrix(CFX_Matrix* matrix);
+  FX_ERR ConcatMatrix(const CFX_Matrix* matrix);
 
   CFX_Matrix* GetMatrix();
 
   FX_ERR GetClipRect(CFX_RectF& rect);
 
   FX_ERR SetClipRect(const CFX_RectF& rect);
 
   FX_ERR ClearClip();
 
   FX_ERR SetFont(CFX_Font* font);
 
   FX_ERR SetFontSize(const FX_FLOAT size);
 
   FX_ERR SetFontHScale(const FX_FLOAT scale);
 
   FX_ERR SetCharSpacing(const FX_FLOAT spacing);
 
   FX_ERR SetTextDrawingMode(const int32_t mode);
 
   FX_ERR ShowText(const CFX_PointF& point,
                   const CFX_WideString& text,
                   CFX_Matrix* matrix = NULL);
 
   FX_ERR CalcTextRect(CFX_RectF& rect,
                       const CFX_WideString& text,
                       FX_BOOL isMultiline = FALSE,
                       CFX_Matrix* matrix = NULL);
 
-  FX_ERR Transfer(CFX_Graphics* graphics, CFX_Matrix* matrix = NULL);
-
+  FX_ERR Transfer(CFX_Graphics* graphics, const CFX_Matrix* matrix);
   FX_ERR Transfer(CFX_Graphics* graphics,
                   FX_FLOAT srcLeft,
                   FX_FLOAT srcTop,
                   const CFX_RectF& dstRect,
-                  CFX_Matrix* matrix = NULL);
+                  const CFX_Matrix* matrix);
 
   CFX_RenderDevice* GetRenderDevice();
 
   FX_ERR InverseRect(const CFX_RectF& rect);
   FX_ERR XorDIBitmap(const CFX_DIBitmap* srcBitmap, const CFX_RectF& rect);
   FX_ERR EqvDIBitmap(const CFX_DIBitmap* srcBitmap, const CFX_RectF& rect);
 
  private:
   FX_ERR RenderDeviceSetLineDash(FX_DashStyle dashStyle);
 
@@ skipping 232 matching lines @@
   FX_FLOAT _endRadius;
   FX_BOOL _isExtendedBegin;
   FX_BOOL _isExtendedEnd;
   FX_ARGB _beginArgb;
   FX_ARGB _endArgb;
   FX_ARGB _argbArray[FX_SHADING_Steps];
   friend class CFX_Graphics;
 };
 
 #endif  // XFA_INCLUDE_FXGRAPHICS_FX_GRAPHICS_H_