fix corpus tests

core/fpdfapi/render/cpdf_renderstatus.cpp

 // Copyright 2016 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
 
 #include "core/fpdfapi/render/cpdf_renderstatus.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 1107 matching lines @@
       return;
     case CPDF_PageObject::FORM:
       bRet = ProcessForm(pObj->AsForm(), pObj2Device);
       break;
   }
   if (!bRet)
     DrawObjWithBackground(pObj, pObj2Device);
 #if defined _SKIA_SUPPORT_
   DebugVerifyDeviceIsPreMultiplied();
 #endif
+#if defined _SKIA_SUPPORT_PATHS_
+  UnPreMultiplyDevice();
+#endif
 }
 
 bool CPDF_RenderStatus::DrawObjWithBlend(CPDF_PageObject* pObj,
                                          const CFX_Matrix* pObj2Device) {
   bool bRet = false;
   switch (pObj->GetType()) {
     case CPDF_PageObject::PATH:
       bRet = ProcessPath(pObj->AsPath(), pObj2Device);
       break;
     case CPDF_PageObject::IMAGE:
@@ skipping 501 matching lines @@
   }
   return pStates;
 }
 
 #if defined _SKIA_SUPPORT_
 void CPDF_RenderStatus::DebugVerifyDeviceIsPreMultiplied() const {
   m_pDevice->DebugVerifyBitmapIsPreMultiplied();
 }
 #endif
 
+#if defined _SKIA_SUPPORT_PATHS_
+void CPDF_RenderStatus::UnPreMultiplyDevice() {
+  m_pDevice->UnPreMultiplyDevice();
+}
+#endif
+
 bool CPDF_RenderStatus::ProcessText(CPDF_TextObject* textobj,
                                     const CFX_Matrix* pObj2Device,
                                     CFX_PathData* pClippingPath) {
   if (textobj->m_nChars == 0)
     return true;
 
   const TextRenderingMode text_render_mode = textobj->m_TextState.GetTextMode();
   if (text_render_mode == TextRenderingMode::MODE_INVISIBLE)
     return true;
 
@@ skipping 958 matching lines @@
   } else if (pFunc) {
     int size = dest_pitch * height;
     for (int i = 0; i < size; i++) {
       dest_buf[i] = transfers[src_buf[i]];
     }
   } else {
     FXSYS_memcpy(dest_buf, src_buf, dest_pitch * height);
   }
   return pMask.release();
 }