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