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, GetClippedBitmap_TallerThanWide) {
  27   // The input bitmap is vertically long.
  28   gfx::Canvas canvas(gfx::Size(40, 90), 1.0f, true);
  29   SkBitmap bitmap =
  30       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  31
  32   // The desired size is square.
  33   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
  34   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
  35       bitmap, 10, 10, &clip_result);
  36   // The clipped bitmap should be square.
  37   EXPECT_EQ(40, clipped_bitmap.width());
  38   EXPECT_EQ(40, clipped_bitmap.height());
  39   // The input was taller than wide.
  40   EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
  41 }
  42
  43 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_WiderThanTall) {
  44   // The input bitmap is horizontally long.
  45   gfx::Canvas canvas(gfx::Size(70, 40), 1.0f, true);
  46   SkBitmap bitmap =
  47       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  48
  49   // The desired size is square.
  50   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
  51   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
  52       bitmap, 10, 10, &clip_result);
  53   // The clipped bitmap should be square.
  54   EXPECT_EQ(40, clipped_bitmap.width());
  55   EXPECT_EQ(40, clipped_bitmap.height());
  56   // The input was wider than tall.
  57   EXPECT_EQ(thumbnails::CLIP_RESULT_WIDER_THAN_TALL, clip_result);
  58 }
  59
  60 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_TooWiderThanTall) {
  61   // The input bitmap is horizontally very long.
  62   gfx::Canvas canvas(gfx::Size(90, 40), 1.0f, true);
  63   SkBitmap bitmap =
  64       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  65
  66   // The desired size is square.
  67   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
  68   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
  69       bitmap, 10, 10, &clip_result);
  70   // The clipped bitmap should be square.
  71   EXPECT_EQ(40, clipped_bitmap.width());
  72   EXPECT_EQ(40, clipped_bitmap.height());
  73   // The input was wider than tall.
  74   EXPECT_EQ(thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL, clip_result);
  75 }
  76
  77 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_NotClipped) {
  78   // The input bitmap is square.
  79   gfx::Canvas canvas(gfx::Size(40, 40), 1.0f, true);
  80   SkBitmap bitmap =
  81       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  82
  83   // The desired size is square.
  84   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
  85   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
  86       bitmap, 10, 10, &clip_result);
  87   // The clipped bitmap should be square.
  88   EXPECT_EQ(40, clipped_bitmap.width());
  89   EXPECT_EQ(40, clipped_bitmap.height());
  90   // There was no need to clip.
  91   EXPECT_EQ(thumbnails::CLIP_RESULT_NOT_CLIPPED, clip_result);
  92 }
  93
  94 TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_NonSquareOutput) {
  95   // The input bitmap is square.
  96   gfx::Canvas canvas(gfx::Size(40, 40), 1.0f, true);
  97   SkBitmap bitmap =
  98       skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
  99
 100   // The desired size is horizontally long.
 101   thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
 102   SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
 103       bitmap, 20, 10, &clip_result);
 104   // The clipped bitmap should have the same aspect ratio of the desired size.
 105   EXPECT_EQ(40, clipped_bitmap.width());
 106   EXPECT_EQ(20, clipped_bitmap.height());
 107   // The input was taller than wide.
 108   EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
 109 }
 110
 111 TEST_F(SimpleThumbnailCropTest, GetCanvasCopyInfo) {
 112   gfx::Size thumbnail_size(200, 120);
 113   float desired_aspect =
 114       static_cast<float>(thumbnail_size.width()) / thumbnail_size.height();
 115   scoped_refptr<thumbnails::ThumbnailingAlgorithm> algorithm(
 116       new SimpleThumbnailCrop(thumbnail_size));
 117   gfx::Rect clipping_rect_result;
 118   gfx::Size target_size_result;
 119
 120   thumbnails::ClipResult clip_result = algorithm->GetCanvasCopyInfo(
 121       gfx::Size(400, 210),
 122       ui::SCALE_FACTOR_200P,
 123       &clipping_rect_result,
 124       &target_size_result);
 125   gfx::Size clipping_size = clipping_rect_result.size();
 126   float clip_aspect =
 127       static_cast<float>(clipping_size.width()) / clipping_size.height();
 128   EXPECT_EQ(thumbnails::CLIP_RESULT_WIDER_THAN_TALL, clip_result);
 129   EXPECT_EQ(thumbnail_size, target_size_result);
 130   EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
 131
 132   clip_result = algorithm->GetCanvasCopyInfo(
 133       gfx::Size(600, 200),
 134       ui::SCALE_FACTOR_200P,
 135       &clipping_rect_result,
 136       &target_size_result);
 137   clipping_size = clipping_rect_result.size();
 138   clip_aspect =
 139       static_cast<float>(clipping_size.width()) / clipping_size.height();
 140   EXPECT_EQ(thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL, clip_result);
 141   EXPECT_EQ(thumbnail_size, target_size_result);
 142   EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
 143
 144   clip_result = algorithm->GetCanvasCopyInfo(
 145       gfx::Size(300, 600),
 146       ui::SCALE_FACTOR_200P,
 147       &clipping_rect_result,
 148       &target_size_result);
 149   clipping_size = clipping_rect_result.size();
 150   clip_aspect =
 151       static_cast<float>(clipping_size.width()) / clipping_size.height();
 152   EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
 153   EXPECT_EQ(thumbnail_size, target_size_result);
 154   EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
 155
 156   clip_result = algorithm->GetCanvasCopyInfo(
 157       gfx::Size(200, 100),
 158       ui::SCALE_FACTOR_200P,
 159       &clipping_rect_result,
 160       &target_size_result);
 161   EXPECT_EQ(thumbnails::CLIP_RESULT_SOURCE_IS_SMALLER, clip_result);
 162   EXPECT_EQ(thumbnail_size, target_size_result);
 163 }
 164
 165 TEST_F(SimpleThumbnailCropTest, GetClippingRect) {
 166   const gfx::Size desired_size(300, 200);
 167   thumbnails::ClipResult clip_result;
 168   // Try out 'microsource'.
 169   gfx::Rect clip_rect = SimpleThumbnailCrop::GetClippingRect(
 170       gfx::Size(300, 199), desired_size, &clip_result);
 171   EXPECT_EQ(thumbnails::CLIP_RESULT_SOURCE_IS_SMALLER, clip_result);
 172   EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
 173   EXPECT_EQ(desired_size.ToString(), clip_rect.size().ToString());
 174
 175   // Portrait source.
 176   clip_rect = SimpleThumbnailCrop::GetClippingRect(
 177       gfx::Size(500, 1200), desired_size, &clip_result);
 178   EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
 179   EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
 180   EXPECT_EQ(500, clip_rect.width());
 181   EXPECT_GE(1200, clip_rect.height());
 182
 183   clip_rect = SimpleThumbnailCrop::GetClippingRect(
 184       gfx::Size(2000, 800), desired_size, &clip_result);
 185   EXPECT_TRUE(clip_result == thumbnails::CLIP_RESULT_WIDER_THAN_TALL ||
 186               clip_result == thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL);
 187   EXPECT_EQ(0, clip_rect.y());
 188   EXPECT_LT(0, clip_rect.x());
 189   EXPECT_GE(2000, clip_rect.width());
 190   EXPECT_EQ(800, clip_rect.height());
 191
 192   clip_rect = SimpleThumbnailCrop::GetClippingRect(
 193       gfx::Size(900, 600), desired_size, &clip_result);
 194   EXPECT_EQ(thumbnails::CLIP_RESULT_NOT_CLIPPED, clip_result);
 195   EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
 196   EXPECT_EQ(gfx::Size(900, 600).ToString(), clip_rect.size().ToString());
 197 }