chrome/utility/cloud_print/pwg_encoder_unittest.cc

   1 // Copyright 2013 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 "base/file_util.h"
   6 #include "base/memory/scoped_ptr.h"
   7 #include "base/sha1.h"
   8 #include "chrome/utility/cloud_print/bitmap_image.h"
   9 #include "chrome/utility/cloud_print/pwg_encoder.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 namespace cloud_print {
  13
  14 namespace {
  15
  16 // SHA-1 of golden master for this test, plus null terminating character.
  17 // File is in chrome/test/data/printing/test_pwg_generator.pwg.
  18 const char kPWGFileSha1[] = {
  19   '\xda', '\x5c', '\xca', '\x36', '\x10', '\xb9', '\xa4', '\x16',
  20   '\x2f', '\x98', '\x1b', '\xa6', '\x5f', '\x43', '\x24', '\x33',
  21   '\x60', '\x43', '\x67', '\x34', '\0'
  22 };
  23
  24 const int kRasterWidth = 612;
  25 const int kRasterHeight = 792;
  26 const int kRasterDPI = 72;
  27
  28 scoped_ptr<BitmapImage> MakeSampleBitmap() {
  29   scoped_ptr<BitmapImage> bitmap_image(
  30       new BitmapImage(gfx::Size(kRasterWidth, kRasterHeight),
  31                       BitmapImage::RGBA));
  32
  33   uint32* bitmap_data = reinterpret_cast<uint32*>(
  34       bitmap_image->pixel_data());
  35
  36   for (int i = 0; i < kRasterWidth * kRasterHeight; i++) {
  37     bitmap_data[i] = 0xFFFFFF;
  38   }
  39
  40
  41   for (int i = 0; i < kRasterWidth; i++) {
  42     for (int j = 200; j < 300; j++) {
  43       int row_start = j * kRasterWidth;
  44       uint32 red = (i * 255)/kRasterWidth;
  45       bitmap_data[row_start + i] = red;
  46     }
  47   }
  48
  49   // To test run length encoding
  50   for (int i = 0; i < kRasterWidth; i++) {
  51     for (int j = 400; j < 500; j++) {
  52       int row_start = j * kRasterWidth;
  53       if ((i/40) % 2 == 0) {
  54         bitmap_data[row_start + i] = 255 << 8;
  55       } else {
  56         bitmap_data[row_start + i] = 255 << 16;
  57       }
  58     }
  59   }
  60
  61   return bitmap_image.Pass();
  62 }
  63
  64 }  // namespace
  65
  66 // TODO(noamsml): Add tests for rotated cases.
  67 TEST(PwgRasterTest, CompareWithMaster) {
  68   std::string output;
  69   PwgEncoder encoder;
  70   scoped_ptr<BitmapImage> image = MakeSampleBitmap();
  71
  72   encoder.EncodeDocumentHeader(&output);
  73   encoder.EncodePage(*image, kRasterDPI, 1, &output, false);
  74
  75   EXPECT_EQ(kPWGFileSha1, base::SHA1HashString(output));
  76 }
  77
  78 }  // namespace cloud_print