Rasterize page before printing.

printing/emf_win_unittest.cc

 // 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.
 
 #include "printing/emf_win.h"
 
 // For quick access.
 #include <wingdi.h>
 #include <winspool.h>
 
@@ skipping 184 matching lines @@
   // Playback the data.
   HDC hdc = CreateCompatibleDC(NULL);
   EXPECT_TRUE(hdc);
   Emf emf;
   EXPECT_TRUE(emf.InitFromFile(metafile_path));
   RECT output_rect = {0, 0, 10, 10};
   EXPECT_TRUE(emf.Playback(hdc, &output_rect));
   EXPECT_TRUE(DeleteDC(hdc));
 }
 
+TEST(EmfTest, RasterizeMetafile) {
+  Emf emf;
+  EXPECT_TRUE(emf.Init());
+  EXPECT_TRUE(emf.context() != NULL);
+  HBRUSH brush = static_cast<HBRUSH>(GetStockObject(BLACK_BRUSH));
+  for (int i = 0; i < 4; ++i) {
+    RECT rect = { 5 + i, 5 + i, 5 + i + 1, 5 + i + 2};
+    FillRect(emf.context(), &rect, brush);
+  }
+  EXPECT_TRUE(emf.FinishDocument());
+
+  scoped_ptr<Emf> raster(emf.RasterizeMetafile(1));
+  // Just 1px bitmap but should be stretched to the same bounds.
+  EXPECT_EQ(emf.GetPageBounds(1), raster->GetPageBounds(1));
+
+  raster.reset(emf.RasterizeMetafile(20));
+  EXPECT_EQ(emf.GetPageBounds(1), raster->GetPageBounds(1));
+
+  raster.reset(emf.RasterizeMetafile(16*1024*1024));
+  // Expected size about 64MB.
+  EXPECT_LE(abs(int(raster->GetDataSize()) - 64*1024*1024), 1024*1024);
+  // Bounds should still be the same.
+  EXPECT_EQ(emf.GetPageBounds(1), raster->GetPageBounds(1));
+}
+
 }  // namespace printing