pdf/paint_manager_unittest.cc

   1 // Copyright 2022 The Chromium Authors
   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 "pdf/paint_manager.h"
   6
   7 #include <utility>
   8
   9 #include "base/files/file_path.h"
  10 #include "base/run_loop.h"
  11 #include "base/strings/string_piece.h"
  12 #include "cc/test/pixel_comparator.h"
  13 #include "cc/test/pixel_test_utils.h"
  14 #include "pdf/paint_ready_rect.h"
  15 #include "pdf/test/test_helpers.h"
  16 #include "testing/gmock/include/gmock/gmock.h"
  17 #include "testing/gtest/include/gtest/gtest.h"
  18 #include "third_party/skia/include/core/SkBitmap.h"
  19 #include "third_party/skia/include/core/SkCanvas.h"
  20 #include "third_party/skia/include/core/SkColor.h"
  21 #include "third_party/skia/include/core/SkImage.h"
  22 #include "third_party/skia/include/core/SkRect.h"
  23 #include "third_party/skia/include/core/SkRefCnt.h"
  24 #include "third_party/skia/include/core/SkSurface.h"
  25 #include "ui/gfx/geometry/rect.h"
  26 #include "ui/gfx/geometry/size.h"
  27 #include "ui/gfx/geometry/skia_conversions.h"
  28
  29 namespace chrome_pdf {
  30
  31 namespace {
  32
  33 using ::testing::_;
  34 using ::testing::NiceMock;
  35
  36 base::FilePath GetTestDataFilePath(base::StringPiece filename) {
  37   return base::FilePath(FILE_PATH_LITERAL("paint_manager"))
  38       .AppendASCII(filename);
  39 }
  40
  41 class FakeClient : public PaintManager::Client {
  42  public:
  43   MOCK_METHOD(void, InvalidatePluginContainer, (), (override));
  44   MOCK_METHOD(void,
  45               OnPaint,
  46               (const std::vector<gfx::Rect>& paint_rects,
  47                std::vector<PaintReadyRect>& ready,
  48                std::vector<gfx::Rect>& pending),
  49               (override));
  50   MOCK_METHOD(void, UpdateSnapshot, (sk_sp<SkImage> snapshot), (override));
  51   MOCK_METHOD(void, UpdateScale, (float scale), (override));
  52   MOCK_METHOD(void,
  53               UpdateLayerTransform,
  54               (float scale, const gfx::Vector2dF& translate),
  55               (override));
  56 };
  57
  58 class PaintManagerTest : public testing::Test {
  59  protected:
  60   void WaitForOnPaint() {
  61     base::RunLoop run_loop;
  62     EXPECT_CALL(client_, OnPaint).WillOnce([&run_loop] { run_loop.Quit(); });
  63     run_loop.Run();
  64   }
  65
  66   sk_sp<SkImage> WaitForFlush(
  67       const std::vector<gfx::Rect>& expected_paint_rects,
  68       std::vector<PaintReadyRect> fake_ready,
  69       std::vector<gfx::Rect> fake_pending) {
  70     EXPECT_CALL(client_, OnPaint(expected_paint_rects, _, _))
  71         .WillOnce([&fake_ready, &fake_pending](
  72                       const std::vector<gfx::Rect>& paint_rects,
  73                       std::vector<PaintReadyRect>& ready,
  74                       std::vector<gfx::Rect>& pending) {
  75           ready = std::move(fake_ready);
  76           pending = std::move(fake_pending);
  77         });
  78
  79     sk_sp<SkImage> saved_snapshot;
  80     base::RunLoop run_loop;
  81     EXPECT_CALL(client_, UpdateSnapshot)
  82         .WillOnce([&saved_snapshot, &run_loop](sk_sp<SkImage> snapshot) {
  83           saved_snapshot = std::move(snapshot);
  84           run_loop.Quit();
  85         });
  86     run_loop.Run();
  87
  88     return saved_snapshot;
  89   }
  90
  91   void TestPaintImage(const gfx::Size& plugin_size,
  92                       const gfx::Size& source_size,
  93                       const gfx::Rect& paint_rect,
  94                       const gfx::Rect& overlapped_rect) {
  95     // Paint `paint_rect` from `source_size` image over a magenta background.
  96     paint_manager_.SetSize(plugin_size, 1.0f);
  97     sk_sp<SkImage> snapshot = WaitForFlush(
  98         /*expected_paint_rects=*/{{gfx::Rect(plugin_size)}},
  99         /*fake_ready=*/
 100         {
 101             {gfx::Rect(plugin_size),
 102              CreateSkiaImageForTesting(plugin_size, SK_ColorMAGENTA)},
 103             {paint_rect, CreateSkiaImageForTesting(source_size, SK_ColorRED)},
 104         },
 105         /*fake_pending=*/{});
 106     ASSERT_TRUE(snapshot);
 107
 108     // Check if snapshot has `overlapped_rect` painted red.
 109     snapshot = snapshot->makeSubset(
 110         SkIRect::MakeWH(plugin_size.width(), plugin_size.height()));
 111     ASSERT_TRUE(snapshot);
 112
 113     SkBitmap snapshot_bitmap;
 114     ASSERT_TRUE(snapshot->asLegacyBitmap(&snapshot_bitmap));
 115
 116     sk_sp<SkSurface> expected_surface =
 117         CreateSkiaSurfaceForTesting(plugin_size, SK_ColorMAGENTA);
 118     expected_surface->getCanvas()->clipIRect(
 119         gfx::RectToSkIRect(overlapped_rect));
 120     expected_surface->getCanvas()->clear(SK_ColorRED);
 121
 122     SkBitmap expected_bitmap;
 123     ASSERT_TRUE(expected_surface->makeImageSnapshot()->asLegacyBitmap(
 124         &expected_bitmap));
 125
 126     EXPECT_TRUE(
 127         cc::MatchesBitmap(snapshot_bitmap, expected_bitmap,
 128                           cc::ExactPixelComparator(/*discard_alpha=*/false)));
 129   }
 130
 131   void TestScroll(const gfx::Vector2d& scroll_amount,
 132                   const gfx::Rect& expected_paint_rect,
 133                   base::StringPiece expected_png) {
 134     // Paint non-uniform initial image.
 135     gfx::Size plugin_size = paint_manager_.GetEffectiveSize();
 136     ASSERT_GE(plugin_size.width(), 4);
 137     ASSERT_GE(plugin_size.height(), 4);
 138
 139     sk_sp<SkSurface> initial_surface =
 140         CreateSkiaSurfaceForTesting(plugin_size, SK_ColorRED);
 141     initial_surface->getCanvas()->clipIRect(SkIRect::MakeLTRB(
 142         1, 1, plugin_size.width() - 1, plugin_size.height() - 2));
 143     initial_surface->getCanvas()->clear(SK_ColorGREEN);
 144
 145     paint_manager_.Invalidate();
 146     ASSERT_TRUE(WaitForFlush(
 147         /*expected_paint_rects=*/{gfx::Rect(plugin_size)},
 148         /*fake_ready=*/
 149         {{gfx::Rect(plugin_size), initial_surface->makeImageSnapshot()}},
 150         /*fake_pending=*/{}));
 151
 152     // Scroll by `scroll_amount`, painting `expected_paint_rect` magenta.
 153     paint_manager_.ScrollRect(gfx::Rect(plugin_size), scroll_amount);
 154     sk_sp<SkImage> snapshot = WaitForFlush(
 155         /*expected_paint_rects=*/{expected_paint_rect},
 156         /*fake_ready=*/
 157         {{expected_paint_rect,
 158           CreateSkiaImageForTesting(plugin_size, SK_ColorMAGENTA)}},
 159         /*fake_pending=*/{});
 160     ASSERT_TRUE(snapshot);
 161
 162     // Compare snapshot to `expected_png`.
 163     snapshot = snapshot->makeSubset(
 164         SkIRect::MakeWH(plugin_size.width(), plugin_size.height()));
 165     ASSERT_TRUE(snapshot);
 166
 167     EXPECT_TRUE(
 168         MatchesPngFile(snapshot.get(), GetTestDataFilePath(expected_png)));
 169   }
 170
 171   NiceMock<FakeClient> client_;
 172   PaintManager paint_manager_{&client_};
 173 };
 174
 175 TEST_F(PaintManagerTest, GetNewContextSizeWhenGrowingBelowMaximum) {
 176   EXPECT_EQ(gfx::Size(450, 350),
 177             PaintManager::GetNewContextSize({450, 350}, {450, 349}));
 178   EXPECT_EQ(gfx::Size(450, 350),
 179             PaintManager::GetNewContextSize({450, 350}, {449, 350}));
 180 }
 181
 182 TEST_F(PaintManagerTest, GetNewContextSizeWhenGrowingAboveMaximum) {
 183   EXPECT_EQ(gfx::Size(501, 400),
 184             PaintManager::GetNewContextSize({450, 350}, {451, 350}));
 185   EXPECT_EQ(gfx::Size(500, 401),
 186             PaintManager::GetNewContextSize({450, 350}, {450, 351}));
 187 }
 188
 189 TEST_F(PaintManagerTest, GetNewContextSizeWhenShrinkingAboveMinimum) {
 190   EXPECT_EQ(gfx::Size(450, 350),
 191             PaintManager::GetNewContextSize({450, 350}, {350, 251}));
 192   EXPECT_EQ(gfx::Size(450, 350),
 193             PaintManager::GetNewContextSize({450, 350}, {351, 250}));
 194 }
 195
 196 TEST_F(PaintManagerTest, GetNewContextSizeWhenShrinkingBelowMinimum) {
 197   EXPECT_EQ(gfx::Size(399, 300),
 198             PaintManager::GetNewContextSize({450, 350}, {349, 250}));
 199   EXPECT_EQ(gfx::Size(400, 299),
 200             PaintManager::GetNewContextSize({450, 350}, {350, 249}));
 201 }
 202
 203 TEST_F(PaintManagerTest, Create) {
 204   EXPECT_EQ(gfx::Size(0, 0), paint_manager_.GetEffectiveSize());
 205   EXPECT_EQ(1.0f, paint_manager_.GetEffectiveDeviceScale());
 206 }
 207
 208 TEST_F(PaintManagerTest, SetSizeWithoutPaint) {
 209   EXPECT_CALL(client_, InvalidatePluginContainer).Times(0);
 210   paint_manager_.SetSize({400, 300}, 2.0f);
 211
 212   EXPECT_EQ(gfx::Size(400, 300), paint_manager_.GetEffectiveSize());
 213   EXPECT_EQ(2.0f, paint_manager_.GetEffectiveDeviceScale());
 214 }
 215
 216 TEST_F(PaintManagerTest, SetSizeWithPaint) {
 217   paint_manager_.SetSize({400, 300}, 2.0f);
 218
 219   EXPECT_CALL(client_, InvalidatePluginContainer);
 220   EXPECT_CALL(client_, UpdateScale(0.5f));
 221   WaitForOnPaint();
 222 }
 223
 224 TEST_F(PaintManagerTest, SetTransformWithoutSurface) {
 225   EXPECT_CALL(client_, UpdateLayerTransform).Times(0);
 226   paint_manager_.SetTransform(0.25f, {150, 50}, {-4, 8},
 227                               /*schedule_flush=*/true);
 228 }
 229
 230 TEST_F(PaintManagerTest, SetTransformWithSurface) {
 231   paint_manager_.SetSize({400, 300}, 2.0f);
 232   WaitForOnPaint();
 233
 234   EXPECT_CALL(client_,
 235               UpdateLayerTransform(0.25f, gfx::Vector2dF(116.5f, 29.5f)));
 236   paint_manager_.SetTransform(0.25f, {150, 50}, {-4, 8},
 237                               /*schedule_flush=*/true);
 238   WaitForOnPaint();
 239 }
 240
 241 TEST_F(PaintManagerTest, ClearTransform) {
 242   paint_manager_.SetSize({400, 300}, 2.0f);
 243   WaitForOnPaint();
 244
 245   EXPECT_CALL(client_, UpdateLayerTransform(1.0f, gfx::Vector2dF()));
 246   paint_manager_.ClearTransform();
 247 }
 248
 249 TEST_F(PaintManagerTest, DoPaintFirst) {
 250   paint_manager_.SetSize({400, 300}, 2.0f);
 251
 252   sk_sp<SkImage> snapshot =
 253       WaitForFlush(/*expected_paint_rects=*/{{0, 0, 400, 300}},
 254                    /*fake_ready=*/
 255                    {{{25, 50, 200, 100},
 256                      CreateSkiaImageForTesting({200, 100}, SK_ColorGRAY)}},
 257                    /*fake_pending=*/{});
 258
 259   EXPECT_TRUE(MatchesPngFile(snapshot.get(),
 260                              GetTestDataFilePath("do_paint_first.png")));
 261 }
 262
 263 TEST_F(PaintManagerTest, PaintImage) {
 264   // Painted area is within the plugin area and the source image.
 265   TestPaintImage(/*plugin_size=*/{20, 20}, /*source_size=*/{15, 15},
 266                  /*paint_rect=*/{0, 0, 10, 10},
 267                  /*overlapped_rect=*/{0, 0, 10, 10});
 268
 269   // Painted area straddles the plugin area and the source image.
 270   TestPaintImage(/*plugin_size=*/{50, 30}, /*source_size=*/{30, 50},
 271                  /*paint_rect=*/{10, 10, 30, 30},
 272                  /*overlapped_rect=*/{10, 10, 20, 20});
 273
 274   // Painted area is outside the plugin area.
 275   TestPaintImage(/*plugin_size=*/{10, 10}, /*source_size=*/{30, 30},
 276                  /*paint_rect=*/{10, 10, 10, 10},
 277                  /*overlapped_rect=*/{0, 0, 0, 0});
 278
 279   // Painted area is outside the source image.
 280   TestPaintImage(/*plugin_size=*/{15, 15}, /*source_size=*/{5, 5},
 281                  /*paint_rect=*/{10, 10, 5, 5},
 282                  /*overlapped_rect=*/{0, 0, 0, 0});
 283 }
 284
 285 TEST_F(PaintManagerTest, Scroll) {
 286   paint_manager_.SetSize({4, 5}, 1.0f);
 287
 288   TestScroll(/*scroll_amount=*/{1, 0}, /*expected_paint_rect=*/{0, 0, 1, 5},
 289              "scroll_right.png");
 290   TestScroll(/*scroll_amount=*/{-2, 0}, /*expected_paint_rect=*/{2, 0, 2, 5},
 291              "scroll_left.png");
 292   TestScroll(/*scroll_amount=*/{0, 3}, /*expected_paint_rect=*/{0, 0, 4, 3},
 293              "scroll_down.png");
 294   TestScroll(/*scroll_amount=*/{0, -3}, /*expected_paint_rect=*/{0, 2, 4, 3},
 295              "scroll_up.png");
 296 }
 297
 298 TEST_F(PaintManagerTest, ScrollIgnored) {
 299   paint_manager_.SetSize({4, 5}, 1.0f);
 300
 301   // Scroll to the edge of the plugin area.
 302   TestScroll(/*scroll_amount=*/{4, 0}, /*expected_paint_rect=*/{0, 0, 4, 5},
 303              "scroll_ignored.png");
 304   TestScroll(/*scroll_amount=*/{-4, 0}, /*expected_paint_rect=*/{0, 0, 4, 5},
 305              "scroll_ignored.png");
 306   TestScroll(/*scroll_amount=*/{0, 5}, /*expected_paint_rect=*/{0, 0, 4, 5},
 307              "scroll_ignored.png");
 308   TestScroll(/*scroll_amount=*/{0, -5}, /*expected_paint_rect=*/{0, 0, 4, 5},
 309              "scroll_ignored.png");
 310
 311   // Scroll outside of the plugin area.
 312   TestScroll(/*scroll_amount=*/{5, 0}, /*expected_paint_rect=*/{0, 0, 4, 5},
 313              "scroll_ignored.png");
 314   TestScroll(/*scroll_amount=*/{-7, 0}, /*expected_paint_rect=*/{0, 0, 4, 5},
 315              "scroll_ignored.png");
 316   TestScroll(/*scroll_amount=*/{0, 8}, /*expected_paint_rect=*/{0, 0, 4, 5},
 317              "scroll_ignored.png");
 318   TestScroll(/*scroll_amount=*/{0, -9}, /*expected_paint_rect=*/{0, 0, 4, 5},
 319              "scroll_ignored.png");
 320 }
 321
 322 }  // namespace
 323
 324 }  // namespace chrome_pdf