check for null bitmap

core/fxge/skia/fx_skia_device.cpp

 // 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.
 
 #if defined(_SKIA_SUPPORT_)
 #include <algorithm>
 #include <vector>
 
 #include "core/fxcodec/include/fx_codec.h"
 #include "core/fxcrt/include/fx_memory.h"
@@ skipping 1445 matching lines @@
     return FALSE;
   }
   m_pCanvas->save();
   SkMatrix skMatrix;
   SetBitmapMatrix(pMatrix, width, height, &skMatrix);
   m_pCanvas->concat(skMatrix);
   SkPaint paint;
   SetBitmapPaint(pSource->IsAlphaMask(), argb, bitmap_alpha, blend_type,
                  &paint);
   // TODO(caryclark) Once Skia supports 8 bit src to 8 bit dst remove this
-  if (m_pBitmap->GetBPP() == 8 && pSource->GetBPP() == 8) {
+  if (m_pBitmap && m_pBitmap->GetBPP() == 8 && pSource->GetBPP() == 8) {
     SkMatrix inv;
     SkAssertResult(skMatrix.invert(&inv));
     for (int y = 0; y < m_pBitmap->GetHeight(); ++y) {
       for (int x = 0; x < m_pBitmap->GetWidth(); ++x) {
         SkPoint src = {x + 0.5f, y + 0.5f};
         inv.mapPoints(&src, 1);
         // TODO(caryclark) Why does the matrix map require clamping?
         src.fX = SkTMax(0.5f, SkTMin(src.fX, width - 0.5f));
         src.fY = SkTMax(0.5f, SkTMin(src.fY, height - 0.5f));
         m_pBitmap->SetPixel(x, y, skBitmap.getColor(src.fX, src.fY));
@@ skipping 205 matching lines @@
       SkA32Assert(a);
       SkASSERT(r <= a);
       SkASSERT(g <= a);
       SkASSERT(b <= a);
     }
   }
 #endif
 }
 
 #endif