Check dimensions and content of bitmaps in EmbedderTests.

testing/embedder_test.h

 // Copyright 2015 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.
 
 #ifndef TESTING_EMBEDDER_TEST_H_
 #define TESTING_EMBEDDER_TEST_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 87 matching lines @@
   // Load a specific page of the open document.
   virtual FPDF_PAGE LoadPage(int page_number);
 
   // Convert a loaded page into a bitmap.
   virtual FPDF_BITMAP RenderPage(FPDF_PAGE page);
 
   // Relese the resources obtained from LoadPage(). Further use of |page|
   // is prohibited after this call is made.
   virtual void UnloadPage(FPDF_PAGE page);
 
+  // Check |bitmap| to make sure it has the right dimensions and content.
+  static void CompareBitmap(FPDF_BITMAP bitmap,
+                            int expected_width,
+                            int expected_height,
+                            const char* expected_md5sum);
+
  protected:
   void SetupFormFillEnvironment();
 
   Delegate* delegate_;
   std::unique_ptr<Delegate> default_delegate_;
   FPDF_DOCUMENT document_;
   FPDF_FORMHANDLE form_handle_;
   FPDF_AVAIL avail_;
   FX_DOWNLOADHINTS hints_;
   FPDF_FILEACCESS file_access_;
@@ skipping 18 matching lines @@
   static int SetTimerTrampoline(FPDF_FORMFILLINFO* info,
                                 int msecs,
                                 TimerCallback fn);
   static void KillTimerTrampoline(FPDF_FORMFILLINFO* info, int id);
   static FPDF_PAGE GetPageTrampoline(FPDF_FORMFILLINFO* info,
                                      FPDF_DOCUMENT document,
                                      int page_index);
 };
 
 #endif  // TESTING_EMBEDDER_TEST_H_