printing/emf_win_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "printing/emf_win.h"
   6
   7 // For quick access.
   8 #include <wingdi.h>
   9 #include <winspool.h>
  10
  11 #include <string>
  12
  13 #include "base/basictypes.h"
  14 #include "base/files/file_path.h"
  15 #include "base/files/file_util.h"
  16 #include "base/files/scoped_temp_dir.h"
  17 #include "base/memory/scoped_ptr.h"
  18 #include "base/path_service.h"
  19 #include "base/win/scoped_hdc.h"
  20 #include "printing/printing_context.h"
  21 #include "testing/gtest/include/gtest/gtest.h"
  22 #include "ui/gfx/point.h"
  23 #include "ui/gfx/size.h"
  24
  25 namespace printing {
  26
  27 namespace {
  28
  29 // This test is automatically disabled if no printer named "UnitTest Printer" is
  30 // available.
  31 class EmfPrintingTest : public testing::Test, public PrintingContext::Delegate {
  32  public:
  33   typedef testing::Test Parent;
  34   static bool IsTestCaseDisabled() {
  35     // It is assumed this printer is a HP Color LaserJet 4550 PCL or 4700.
  36     HDC hdc = CreateDC(L"WINSPOOL", L"UnitTest Printer", NULL, NULL);
  37     if (!hdc)
  38       return true;
  39     DeleteDC(hdc);
  40     return false;
  41   }
  42
  43   // PrintingContext::Delegate methods.
  44   virtual gfx::NativeView GetParentView() override { return NULL; }
  45   virtual std::string GetAppLocale() override { return std::string(); }
  46 };
  47
  48 const uint32 EMF_HEADER_SIZE = 128;
  49
  50 }  // namespace
  51
  52 TEST(EmfTest, DC) {
  53   // Simplest use case.
  54   uint32 size;
  55   std::vector<char> data;
  56   {
  57     Emf emf;
  58     EXPECT_TRUE(emf.Init());
  59     EXPECT_TRUE(emf.context() != NULL);
  60     // An empty EMF is invalid, so we put at least a rectangle in it.
  61     ::Rectangle(emf.context(), 10, 10, 190, 190);
  62     EXPECT_TRUE(emf.FinishDocument());
  63     size = emf.GetDataSize();
  64     EXPECT_GT(size, EMF_HEADER_SIZE);
  65     EXPECT_TRUE(emf.GetDataAsVector(&data));
  66     EXPECT_EQ(data.size(), size);
  67   }
  68
  69   // Playback the data.
  70   Emf emf;
  71   EXPECT_TRUE(emf.InitFromData(&data.front(), size));
  72   HDC hdc = CreateCompatibleDC(NULL);
  73   EXPECT_TRUE(hdc);
  74   RECT output_rect = {0, 0, 10, 10};
  75   EXPECT_TRUE(emf.Playback(hdc, &output_rect));
  76   EXPECT_TRUE(DeleteDC(hdc));
  77 }
  78
  79 // Disabled if no "UnitTest printer" exist. Useful to reproduce bug 1186598.
  80 TEST_F(EmfPrintingTest, Enumerate) {
  81   if (IsTestCaseDisabled())
  82     return;
  83
  84   PrintSettings settings;
  85
  86   // My test case is a HP Color LaserJet 4550 PCL.
  87   settings.set_device_name(L"UnitTest Printer");
  88
  89   // Initialize it.
  90   scoped_ptr<PrintingContext> context(PrintingContext::Create(this));
  91   EXPECT_EQ(context->InitWithSettings(settings), PrintingContext::OK);
  92
  93   base::FilePath emf_file;
  94   EXPECT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &emf_file));
  95   emf_file = emf_file.Append(FILE_PATH_LITERAL("printing"))
  96                      .Append(FILE_PATH_LITERAL("test"))
  97                      .Append(FILE_PATH_LITERAL("data"))
  98                      .Append(FILE_PATH_LITERAL("test4.emf"));
  99   // Load any EMF with an image.
 100   Emf emf;
 101   std::string emf_data;
 102   base::ReadFileToString(emf_file, &emf_data);
 103   ASSERT_TRUE(emf_data.size());
 104   EXPECT_TRUE(emf.InitFromData(&emf_data[0], emf_data.size()));
 105
 106   // This will print to file. The reason is that when running inside a
 107   // unit_test, PrintingContext automatically dumps its files to the
 108   // current directory.
 109   // TODO(maruel):  Clean the .PRN file generated in current directory.
 110   context->NewDocument(L"EmfTest.Enumerate");
 111   context->NewPage();
 112   // Process one at a time.
 113   RECT page_bounds = emf.GetPageBounds(1).ToRECT();
 114   Emf::Enumerator emf_enum(emf, context->context(), &page_bounds);
 115   for (Emf::Enumerator::const_iterator itr = emf_enum.begin();
 116        itr != emf_enum.end();
 117        ++itr) {
 118     // To help debugging.
 119     ptrdiff_t index = itr - emf_enum.begin();
 120     // If you get this assert, you need to lookup iType in wingdi.h. It starts
 121     // with EMR_HEADER.
 122     EMR_HEADER;
 123     EXPECT_TRUE(itr->SafePlayback(&emf_enum.context_)) <<
 124         " index: " << index << " type: " << itr->record()->iType;
 125   }
 126   context->PageDone();
 127   context->DocumentDone();
 128 }
 129
 130 // Disabled if no "UnitTest printer" exists.
 131 TEST_F(EmfPrintingTest, PageBreak) {
 132   base::win::ScopedCreateDC dc(
 133       CreateDC(L"WINSPOOL", L"UnitTest Printer", NULL, NULL));
 134   if (!dc.Get())
 135     return;
 136   uint32 size;
 137   std::vector<char> data;
 138   {
 139     Emf emf;
 140     EXPECT_TRUE(emf.Init());
 141     EXPECT_TRUE(emf.context() != NULL);
 142     int pages = 3;
 143     while (pages) {
 144       EXPECT_TRUE(emf.StartPage(gfx::Size(), gfx::Rect(), 1));
 145       ::Rectangle(emf.context(), 10, 10, 190, 190);
 146       EXPECT_TRUE(emf.FinishPage());
 147       --pages;
 148     }
 149     EXPECT_EQ(3U, emf.GetPageCount());
 150     EXPECT_TRUE(emf.FinishDocument());
 151     size = emf.GetDataSize();
 152     EXPECT_TRUE(emf.GetDataAsVector(&data));
 153     EXPECT_EQ(data.size(), size);
 154   }
 155
 156   // Playback the data.
 157   DOCINFO di = {0};
 158   di.cbSize = sizeof(DOCINFO);
 159   di.lpszDocName = L"Test Job";
 160   int job_id = ::StartDoc(dc.Get(), &di);
 161   Emf emf;
 162   EXPECT_TRUE(emf.InitFromData(&data.front(), size));
 163   EXPECT_TRUE(emf.SafePlayback(dc.Get()));
 164   ::EndDoc(dc.Get());
 165   // Since presumably the printer is not real, let us just delete the job from
 166   // the queue.
 167   HANDLE printer = NULL;
 168   if (::OpenPrinter(const_cast<LPTSTR>(L"UnitTest Printer"), &printer, NULL)) {
 169     ::SetJob(printer, job_id, 0, NULL, JOB_CONTROL_DELETE);
 170     ClosePrinter(printer);
 171   }
 172 }
 173
 174 TEST(EmfTest, FileBackedEmf) {
 175   // Simplest use case.
 176   base::ScopedTempDir scratch_metafile_dir;
 177   ASSERT_TRUE(scratch_metafile_dir.CreateUniqueTempDir());
 178   base::FilePath metafile_path;
 179   EXPECT_TRUE(base::CreateTemporaryFileInDir(scratch_metafile_dir.path(),
 180                                              &metafile_path));
 181   uint32 size;
 182   std::vector<char> data;
 183   {
 184     Emf emf;
 185     EXPECT_TRUE(emf.InitToFile(metafile_path));
 186     EXPECT_TRUE(emf.context() != NULL);
 187     // An empty EMF is invalid, so we put at least a rectangle in it.
 188     ::Rectangle(emf.context(), 10, 10, 190, 190);
 189     EXPECT_TRUE(emf.FinishDocument());
 190     size = emf.GetDataSize();
 191     EXPECT_GT(size, EMF_HEADER_SIZE);
 192     EXPECT_TRUE(emf.GetDataAsVector(&data));
 193     EXPECT_EQ(data.size(), size);
 194   }
 195   int64 file_size = 0;
 196   base::GetFileSize(metafile_path, &file_size);
 197   EXPECT_EQ(size, file_size);
 198
 199   // Playback the data.
 200   HDC hdc = CreateCompatibleDC(NULL);
 201   EXPECT_TRUE(hdc);
 202   Emf emf;
 203   EXPECT_TRUE(emf.InitFromFile(metafile_path));
 204   RECT output_rect = {0, 0, 10, 10};
 205   EXPECT_TRUE(emf.Playback(hdc, &output_rect));
 206   EXPECT_TRUE(DeleteDC(hdc));
 207 }
 208
 209 TEST(EmfTest, RasterizeMetafile) {
 210   Emf emf;
 211   EXPECT_TRUE(emf.Init());
 212   EXPECT_TRUE(emf.context() != NULL);
 213   HBRUSH brush = static_cast<HBRUSH>(GetStockObject(BLACK_BRUSH));
 214   for (int i = 0; i < 4; ++i) {
 215     RECT rect = { 5 + i, 5 + i, 5 + i + 1, 5 + i + 2};
 216     FillRect(emf.context(), &rect, brush);
 217   }
 218   EXPECT_TRUE(emf.FinishDocument());
 219
 220   scoped_ptr<Emf> raster(emf.RasterizeMetafile(1));
 221   // Just 1px bitmap but should be stretched to the same bounds.
 222   EXPECT_EQ(emf.GetPageBounds(1), raster->GetPageBounds(1));
 223
 224   raster = emf.RasterizeMetafile(20);
 225   EXPECT_EQ(emf.GetPageBounds(1), raster->GetPageBounds(1));
 226
 227   raster = emf.RasterizeMetafile(16 * 1024 * 1024);
 228   // Expected size about 64MB.
 229   EXPECT_LE(abs(int(raster->GetDataSize()) - 64 * 1024 * 1024), 1024 * 1024);
 230   // Bounds should still be the same.
 231   EXPECT_EQ(emf.GetPageBounds(1), raster->GetPageBounds(1));
 232 }
 233
 234 }  // namespace printing