Move Emf class to the printing library. Also creates a platform agnostic NativeMetafile definition to ease platform porting.

BUG=none
TEST=none (No functional change)

Review URL: http://codereview.chromium.org/149181

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@19943 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 117 insertions, 0 deletions

diff --git a/printing/emf_win_unittest.cc b/printing/emf_win_unittest.cc
new file mode 100644
index 0000000..ab817db
--- /dev/null
+++ b/printing/emf_win_unittest.cc
@@ -0,0 +1,117 @@
+// Copyright (c) 2006-2008 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 "base/basictypes.h"
+#include "base/file_util.h"
+#include "base/path_service.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+// This test is automatically disabled if no printer named "UnitTest Printer" is
+// available.
+class EmfPrintingTest : public testing::Test {
+ public:
+  typedef testing::Test Parent;
+  static bool IsTestCaseDisabled() {
+    // It is assumed this printer is a HP Color LaserJet 4550 PCL or 4700.
+    HDC hdc = CreateDC(L"WINSPOOL", L"UnitTest Printer", NULL, NULL);
+    if (!hdc)
+      return true;
+    DeleteDC(hdc);
+    return false;
+  }
+};
+
+}  // namespace
+
+TEST(EmfTest, DC) {
+  static const int EMF_HEADER_SIZE = 128;
+
+  // Simplest use case.
+  printing::Emf emf;
+  RECT rect = {100, 100, 200, 200};
+  HDC hdc = CreateCompatibleDC(NULL);
+  EXPECT_TRUE(hdc != NULL);
+  EXPECT_TRUE(emf.CreateDc(hdc, &rect));
+  EXPECT_TRUE(emf.hdc() != NULL);
+  // In theory, you'd use the HDC with GDI functions here.
+  EXPECT_TRUE(emf.CloseDc());
+  unsigned size = emf.GetDataSize();
+  EXPECT_EQ(size, EMF_HEADER_SIZE);
+  std::vector<BYTE> data;
+  EXPECT_TRUE(emf.GetData(&data));
+  EXPECT_EQ(data.size(), size);
+  emf.CloseEmf();
+  EXPECT_TRUE(DeleteDC(hdc));
+
+  // Playback the data.
+  hdc = CreateCompatibleDC(NULL);
+  EXPECT_TRUE(hdc);
+  EXPECT_TRUE(emf.CreateFromData(&data.front(), size));
+  RECT output_rect = {0, 0, 10, 10};
+  EXPECT_TRUE(emf.Playback(hdc, &output_rect));
+  EXPECT_TRUE(DeleteDC(hdc));
+}
+
+// TODO(sverrir): Re-enable after win_printing_context has been moved here.
+/*
+#include "chrome/browser/printing/win_printing_context.h"
+#include "chrome/common/chrome_paths.h"
+
+// Disabled if no "UnitTest printer" exist. Useful to reproduce bug 1186598.
+TEST_F(EmfPrintingTest, Enumerate) {
+  if (IsTestCaseDisabled())
+    return;
+
+  printing::PrintSettings settings;
+
+  // My test case is a HP Color LaserJet 4550 PCL.
+  settings.set_device_name(L"UnitTest Printer");
+
+  // Initialize it.
+  printing::PrintingContext context;
+  EXPECT_EQ(context.InitWithSettings(settings), printing::PrintingContext::OK);
+
+  std::wstring test_file;
+  PathService::Get(chrome::DIR_TEST_DATA, &test_file);
+
+  // Load any EMF with an image.
+  printing::Emf emf;
+  file_util::AppendToPath(&test_file, L"printing");
+  file_util::AppendToPath(&test_file, L"test4.emf");
+  std::string emf_data;
+  file_util::ReadFileToString(test_file, &emf_data);
+  ASSERT_TRUE(emf_data.size());
+  EXPECT_TRUE(emf.CreateFromData(&emf_data[0], emf_data.size()));
+
+  // This will print to file. The reason is that when running inside a
+  // unit_test, printing::PrintingContext automatically dumps its files to the
+  // current directory.
+  // TODO(maruel):  Clean the .PRN file generated in current directory.
+  context.NewDocument(L"EmfTest.Enumerate");
+  context.NewPage();
+  // Process one at a time.
+  printing::Emf::Enumerator emf_enum(emf, context.context(),
+                                &emf.GetBounds().ToRECT());
+  for (printing::Emf::Enumerator::const_iterator itr = emf_enum.begin();
+       itr != emf_enum.end();
+       ++itr) {
+    // To help debugging.
+    ptrdiff_t index = itr - emf_enum.begin();
+    // If you get this assert, you need to lookup iType in wingdi.h. It starts
+    // with EMR_HEADER.
+    EMR_HEADER;
+    EXPECT_TRUE(itr->SafePlayback(NULL)) <<
+        " index: " << index << " type: " << itr->record()->iType;
+  }
+  context.PageDone();
+  context.DocumentDone();
+}
+*/