src/chrome/browser/thumbnails/simple_thumbnail_crop_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 "chrome/browser/thumbnails/simple_thumbnail_crop.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/strings/stringprintf.h"
   9 #include "chrome/browser/thumbnails/thumbnailing_context.h"
  10 #include "chrome/common/render_messages.h"
  11 #include "content/public/browser/notification_service.h"
  12 #include "content/public/browser/notification_types.h"
  13 #include "content/public/test/mock_render_process_host.h"
  14 #include "content/public/test/test_renderer_host.h"
  15 #include "skia/ext/platform_canvas.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17 #include "third_party/skia/include/core/SkColorPriv.h"
  18 #include "ui/gfx/canvas.h"
  19 #include "ui/surface/transport_dib.h"
  20
  21 using content::WebContents;
  22 using thumbnails::SimpleThumbnailCrop;
  23
  24 typedef testing::Test SimpleThumbnailCropTest;
  25
  26 TEST_F(SimpleThumbnailCropTest, CalculateBoringScore_Empty) {
  27   SkBitmap bitmap;
  28   EXPECT_DOUBLE_EQ(1.0, SimpleThumbnailCrop::CalculateBoringScore(bitmap));
  29 }
  30
  31 TEST_F(SimpleThumbnailCropTest, CalculateBoringScore_SingleColor) {
  32   const gfx::Size kSize(20, 10);
  33   gfx::Canvas canvas(kSize, 1.0f, true);
  34   // Fill all pixels in black.
  35   canvas.FillRect(gfx::Rect(kSize), SK_ColorBLACK);
  36
  37   SkBitmap bitmap =
  38       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  39   // The thumbnail should deserve the highest boring score.
  40   EXPECT_DOUBLE_EQ(1.0, SimpleThumbnailCrop::CalculateBoringScore(bitmap));
  41 }
  42
  43 TEST_F(SimpleThumbnailCropTest, CalculateBoringScore_TwoColors) {
  44   const gfx::Size kSize(20, 10);
  45
  46   gfx::Canvas canvas(kSize, 1.0f, true);
  47   // Fill all pixels in black.
  48   canvas.FillRect(gfx::Rect(kSize), SK_ColorBLACK);
  49   // Fill the left half pixels in white.
  50   canvas.FillRect(gfx::Rect(0, 0, kSize.width() / 2, kSize.height()),
  51                   SK_ColorWHITE);
  52
  53   SkBitmap bitmap =
  54       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  55   ASSERT_EQ(kSize.width(), bitmap.width());
  56   ASSERT_EQ(kSize.height(), bitmap.height());
  57   // The thumbnail should be less boring because two colors are used.
  58   EXPECT_DOUBLE_EQ(0.5, SimpleThumbnailCrop::CalculateBoringScore(bitmap));
  59 }
  60
  61 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_TallerThanWide) {
  62   // The input bitmap is vertically long.
  63   gfx::Canvas canvas(gfx::Size(40, 90), 1.0f, true);
  64   SkBitmap bitmap =
  65       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  66
  67   // The desired size is square.
  68   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
  69   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
  70       bitmap, 10, 10, &clip_result);
  71   // The clipped bitmap should be square.
  72   EXPECT_EQ(40, clipped_bitmap.width());
  73   EXPECT_EQ(40, clipped_bitmap.height());
  74   // The input was taller than wide.
  75   EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
  76 }
  77
  78 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_WiderThanTall) {
  79   // The input bitmap is horizontally long.
  80   gfx::Canvas canvas(gfx::Size(70, 40), 1.0f, true);
  81   SkBitmap bitmap =
  82       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  83
  84   // The desired size is square.
  85   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
  86   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
  87       bitmap, 10, 10, &clip_result);
  88   // The clipped bitmap should be square.
  89   EXPECT_EQ(40, clipped_bitmap.width());
  90   EXPECT_EQ(40, clipped_bitmap.height());
  91   // The input was wider than tall.
  92   EXPECT_EQ(thumbnails::CLIP_RESULT_WIDER_THAN_TALL, clip_result);
  93 }
  94
  95 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_TooWiderThanTall) {
  96   // The input bitmap is horizontally very long.
  97   gfx::Canvas canvas(gfx::Size(90, 40), 1.0f, true);
  98   SkBitmap bitmap =
  99       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
 100
 101   // The desired size is square.
 102   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
 103   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
 104       bitmap, 10, 10, &clip_result);
 105   // The clipped bitmap should be square.
 106   EXPECT_EQ(40, clipped_bitmap.width());
 107   EXPECT_EQ(40, clipped_bitmap.height());
 108   // The input was wider than tall.
 109   EXPECT_EQ(thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL, clip_result);
 110 }
 111
 112 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_NotClipped) {
 113   // The input bitmap is square.
 114   gfx::Canvas canvas(gfx::Size(40, 40), 1.0f, true);
 115   SkBitmap bitmap =
 116       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
 117
 118   // The desired size is square.
 119   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
 120   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
 121       bitmap, 10, 10, &clip_result);
 122   // The clipped bitmap should be square.
 123   EXPECT_EQ(40, clipped_bitmap.width());
 124   EXPECT_EQ(40, clipped_bitmap.height());
 125   // There was no need to clip.
 126   EXPECT_EQ(thumbnails::CLIP_RESULT_NOT_CLIPPED, clip_result);
 127 }
 128
 129 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_NonSquareOutput) {
 130   // The input bitmap is square.
 131   gfx::Canvas canvas(gfx::Size(40, 40), 1.0f, true);
 132   SkBitmap bitmap =
 133       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
 134
 135   // The desired size is horizontally long.
 136   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
 137   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
 138       bitmap, 20, 10, &clip_result);
 139   // The clipped bitmap should have the same aspect ratio of the desired size.
 140   EXPECT_EQ(40, clipped_bitmap.width());
 141   EXPECT_EQ(20, clipped_bitmap.height());
 142   // The input was taller than wide.
 143   EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
 144 }
 145
 146 TEST_F(SimpleThumbnailCropTest, GetCanvasCopyInfo) {
 147   gfx::Size thumbnail_size(200, 120);
 148   float desired_aspect =
 149       static_cast<float>(thumbnail_size.width()) / thumbnail_size.height();
 150   scoped_refptr<thumbnails::ThumbnailingAlgorithm> algorithm(
 151       new SimpleThumbnailCrop(thumbnail_size));
 152   gfx::Rect clipping_rect_result;
 153   gfx::Size target_size_result;
 154
 155   thumbnails::ClipResult clip_result = algorithm->GetCanvasCopyInfo(
 156       gfx::Size(400, 210),
 157       ui::SCALE_FACTOR_200P,
 158       &clipping_rect_result,
 159       &target_size_result);
 160   gfx::Size clipping_size = clipping_rect_result.size();
 161   float clip_aspect =
 162       static_cast<float>(clipping_size.width()) / clipping_size.height();
 163   EXPECT_EQ(thumbnails::CLIP_RESULT_WIDER_THAN_TALL, clip_result);
 164   EXPECT_EQ(thumbnail_size, target_size_result);
 165   EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
 166
 167   clip_result = algorithm->GetCanvasCopyInfo(
 168       gfx::Size(600, 200),
 169       ui::SCALE_FACTOR_200P,
 170       &clipping_rect_result,
 171       &target_size_result);
 172   clipping_size = clipping_rect_result.size();
 173   clip_aspect =
 174       static_cast<float>(clipping_size.width()) / clipping_size.height();
 175   EXPECT_EQ(thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL, clip_result);
 176   EXPECT_EQ(thumbnail_size, target_size_result);
 177   EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
 178
 179   clip_result = algorithm->GetCanvasCopyInfo(
 180       gfx::Size(300, 600),
 181       ui::SCALE_FACTOR_200P,
 182       &clipping_rect_result,
 183       &target_size_result);
 184   clipping_size = clipping_rect_result.size();
 185   clip_aspect =
 186       static_cast<float>(clipping_size.width()) / clipping_size.height();
 187   EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
 188   EXPECT_EQ(thumbnail_size, target_size_result);
 189   EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
 190
 191   clip_result = algorithm->GetCanvasCopyInfo(
 192       gfx::Size(200, 100),
 193       ui::SCALE_FACTOR_200P,
 194       &clipping_rect_result,
 195       &target_size_result);
 196   EXPECT_EQ(thumbnails::CLIP_RESULT_SOURCE_IS_SMALLER, clip_result);
 197   EXPECT_EQ(thumbnail_size, target_size_result);
 198 }
 199
 200 TEST_F(SimpleThumbnailCropTest, GetClippingRect) {
 201   const gfx::Size desired_size(300, 200);
 202   thumbnails::ClipResult clip_result;
 203   // Try out 'microsource'.
 204   gfx::Rect clip_rect = SimpleThumbnailCrop::GetClippingRect(
 205       gfx::Size(300, 199), desired_size, &clip_result);
 206   EXPECT_EQ(thumbnails::CLIP_RESULT_SOURCE_IS_SMALLER, clip_result);
 207   EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
 208   EXPECT_EQ(desired_size.ToString(), clip_rect.size().ToString());
 209
 210   // Portrait source.
 211   clip_rect = SimpleThumbnailCrop::GetClippingRect(
 212       gfx::Size(500, 1200), desired_size, &clip_result);
 213   EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
 214   EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
 215   EXPECT_EQ(500, clip_rect.width());
 216   EXPECT_GE(1200, clip_rect.height());
 217
 218   clip_rect = SimpleThumbnailCrop::GetClippingRect(
 219       gfx::Size(2000, 800), desired_size, &clip_result);
 220   EXPECT_TRUE(clip_result == thumbnails::CLIP_RESULT_WIDER_THAN_TALL ||
 221               clip_result == thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL);
 222   EXPECT_EQ(0, clip_rect.y());
 223   EXPECT_LT(0, clip_rect.x());
 224   EXPECT_GE(2000, clip_rect.width());
 225   EXPECT_EQ(800, clip_rect.height());
 226
 227   clip_rect = SimpleThumbnailCrop::GetClippingRect(
 228       gfx::Size(900, 600), desired_size, &clip_result);
 229   EXPECT_EQ(thumbnails::CLIP_RESULT_NOT_CLIPPED, clip_result);
 230   EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
 231   EXPECT_EQ(gfx::Size(900, 600).ToString(), clip_rect.size().ToString());
 232 }