Rasterize page before printing.

printing/emf_win.h

 // Copyright (c) 2012 The Chromium 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 PRINTING_EMF_WIN_H_
 #define PRINTING_EMF_WIN_H_
 
 #include <windows.h>
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "printing/metafile.h"
 
 class FilePath;
 
 namespace gfx {
 class Rect;
 class Size;
 }
 
 namespace printing {
 
+// http://msdn2.microsoft.com/en-us/library/ms535522.aspx
+// Windows 2000/XP: When a page in a spooled file exceeds approximately 350
+// MB, it can fail to print and not send an error message.
+const size_t kMetafileMaxSize = 350*1024*1024;
+
 // Simple wrapper class that manage an EMF data stream and its virtual HDC.
 class PRINTING_EXPORT Emf : public Metafile {
  public:
   class Record;
   class Enumerator;
   struct EnumerationContext;
 
   // Generates a virtual HDC that will record every GDI commands and compile
   // it in a EMF data stream.
   Emf();
@@ skipping 141 matching lines @@
   // The collection of every EMF records in the currently loaded EMF buffer.
   // Initialized by Enumerate(). It keeps pointers to the EMF buffer held by
   // Emf::emf_. The entries become invalid once Emf::CloseEmf() is called.
   std::vector<Record> items_;
 
   EnumerationContext context_;
 
   DISALLOW_COPY_AND_ASSIGN(Enumerator);
 };
 
+// Returns true if metafile contains alpha blend.
+PRINTING_EXPORT bool IsAlphaBlendUsed(const Emf& metafile);
+
+// Returns new metafile with only bitmap created by playback of the current
+// metafile. Returns NULL if fails.
+PRINTING_EXPORT Emf* RasterizeMetafile(const Emf& metafile,
+                                       int raster_area_in_pixels);
+
 }  // namespace printing
 
 #endif  // PRINTING_EMF_WIN_H_