cc/resources/display_item_list_unittest.cc

   1 // Copyright 2014 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 "cc/resources/display_item_list.h"
   6
   7 #include <vector>
   8
   9 #include "cc/output/filter_operation.h"
  10 #include "cc/output/filter_operations.h"
  11 #include "cc/resources/clip_display_item.h"
  12 #include "cc/resources/drawing_display_item.h"
  13 #include "cc/resources/filter_display_item.h"
  14 #include "cc/resources/transform_display_item.h"
  15 #include "cc/test/skia_common.h"
  16 #include "skia/ext/refptr.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/SkPictureRecorder.h"
  22 #include "third_party/skia/include/effects/SkBitmapSource.h"
  23 #include "third_party/skia/include/utils/SkPictureUtils.h"
  24 #include "ui/gfx/geometry/rect_conversions.h"
  25 #include "ui/gfx/skia_util.h"
  26
  27 namespace cc {
  28
  29 TEST(DisplayItemListTest, SingleDrawingItem) {
  30   gfx::Rect layer_rect(100, 100);
  31   SkPictureRecorder recorder;
  32   skia::RefPtr<SkCanvas> canvas;
  33   skia::RefPtr<SkPicture> picture;
  34   SkPaint blue_paint;
  35   blue_paint.setColor(SK_ColorBLUE);
  36   SkPaint red_paint;
  37   red_paint.setColor(SK_ColorRED);
  38   unsigned char pixels[4 * 100 * 100] = {0};
  39   const bool use_cached_picture = true;
  40   scoped_refptr<DisplayItemList> list =
  41       DisplayItemList::Create(layer_rect, use_cached_picture);
  42
  43   gfx::PointF offset(8.f, 9.f);
  44   gfx::RectF recording_rect(offset, layer_rect.size());
  45   canvas = skia::SharePtr(
  46       recorder.beginRecording(gfx::RectFToSkRect(recording_rect)));
  47   canvas->translate(offset.x(), offset.y());
  48   canvas->drawRectCoords(0.f, 0.f, 60.f, 60.f, red_paint);
  49   canvas->drawRectCoords(50.f, 50.f, 75.f, 75.f, blue_paint);
  50   picture = skia::AdoptRef(recorder.endRecordingAsPicture());
  51   list->AppendItem(DrawingDisplayItem::Create(picture));
  52   list->CreateAndCacheSkPicture();
  53   DrawDisplayList(pixels, layer_rect, list);
  54
  55   SkBitmap expected_bitmap;
  56   unsigned char expected_pixels[4 * 100 * 100] = {0};
  57   SkImageInfo info =
  58       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
  59   expected_bitmap.installPixels(info, expected_pixels, info.minRowBytes());
  60   SkCanvas expected_canvas(expected_bitmap);
  61   expected_canvas.clipRect(gfx::RectToSkRect(layer_rect));
  62   expected_canvas.drawRectCoords(0.f + offset.x(), 0.f + offset.y(),
  63                                  60.f + offset.x(), 60.f + offset.y(),
  64                                  red_paint);
  65   expected_canvas.drawRectCoords(50.f + offset.x(), 50.f + offset.y(),
  66                                  75.f + offset.x(), 75.f + offset.y(),
  67                                  blue_paint);
  68
  69   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
  70 }
  71
  72 TEST(DisplayItemListTest, ClipItem) {
  73   gfx::Rect layer_rect(100, 100);
  74   SkPictureRecorder recorder;
  75   skia::RefPtr<SkCanvas> canvas;
  76   skia::RefPtr<SkPicture> picture;
  77   SkPaint blue_paint;
  78   blue_paint.setColor(SK_ColorBLUE);
  79   SkPaint red_paint;
  80   red_paint.setColor(SK_ColorRED);
  81   unsigned char pixels[4 * 100 * 100] = {0};
  82   const bool use_cached_picture = true;
  83   scoped_refptr<DisplayItemList> list =
  84       DisplayItemList::Create(layer_rect, use_cached_picture);
  85
  86   gfx::PointF first_offset(8.f, 9.f);
  87   gfx::RectF first_recording_rect(first_offset, layer_rect.size());
  88   canvas = skia::SharePtr(
  89       recorder.beginRecording(gfx::RectFToSkRect(first_recording_rect)));
  90   canvas->translate(first_offset.x(), first_offset.y());
  91   canvas->drawRectCoords(0.f, 0.f, 60.f, 60.f, red_paint);
  92   picture = skia::AdoptRef(recorder.endRecordingAsPicture());
  93   list->AppendItem(DrawingDisplayItem::Create(picture));
  94
  95   gfx::Rect clip_rect(60, 60, 10, 10);
  96   list->AppendItem(ClipDisplayItem::Create(clip_rect, std::vector<SkRRect>()));
  97
  98   gfx::PointF second_offset(2.f, 3.f);
  99   gfx::RectF second_recording_rect(second_offset, layer_rect.size());
 100   canvas = skia::SharePtr(
 101       recorder.beginRecording(gfx::RectFToSkRect(second_recording_rect)));
 102   canvas->translate(second_offset.x(), second_offset.y());
 103   canvas->drawRectCoords(50.f, 50.f, 75.f, 75.f, blue_paint);
 104   picture = skia::AdoptRef(recorder.endRecordingAsPicture());
 105   list->AppendItem(DrawingDisplayItem::Create(picture));
 106
 107   list->AppendItem(EndClipDisplayItem::Create());
 108   list->CreateAndCacheSkPicture();
 109
 110   DrawDisplayList(pixels, layer_rect, list);
 111
 112   SkBitmap expected_bitmap;
 113   unsigned char expected_pixels[4 * 100 * 100] = {0};
 114   SkImageInfo info =
 115       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
 116   expected_bitmap.installPixels(info, expected_pixels, info.minRowBytes());
 117   SkCanvas expected_canvas(expected_bitmap);
 118   expected_canvas.clipRect(gfx::RectToSkRect(layer_rect));
 119   expected_canvas.drawRectCoords(0.f + first_offset.x(), 0.f + first_offset.y(),
 120                                  60.f + first_offset.x(),
 121                                  60.f + first_offset.y(), red_paint);
 122   expected_canvas.clipRect(gfx::RectToSkRect(clip_rect));
 123   expected_canvas.drawRectCoords(
 124       50.f + second_offset.x(), 50.f + second_offset.y(),
 125       75.f + second_offset.x(), 75.f + second_offset.y(), blue_paint);
 126
 127   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
 128 }
 129
 130 TEST(DisplayItemListTest, TransformItem) {
 131   gfx::Rect layer_rect(100, 100);
 132   SkPictureRecorder recorder;
 133   skia::RefPtr<SkCanvas> canvas;
 134   skia::RefPtr<SkPicture> picture;
 135   SkPaint blue_paint;
 136   blue_paint.setColor(SK_ColorBLUE);
 137   SkPaint red_paint;
 138   red_paint.setColor(SK_ColorRED);
 139   unsigned char pixels[4 * 100 * 100] = {0};
 140   const bool use_cached_picture = true;
 141   scoped_refptr<DisplayItemList> list =
 142       DisplayItemList::Create(layer_rect, use_cached_picture);
 143
 144   gfx::PointF first_offset(8.f, 9.f);
 145   gfx::RectF first_recording_rect(first_offset, layer_rect.size());
 146   canvas = skia::SharePtr(
 147       recorder.beginRecording(gfx::RectFToSkRect(first_recording_rect)));
 148   canvas->translate(first_offset.x(), first_offset.y());
 149   canvas->drawRectCoords(0.f, 0.f, 60.f, 60.f, red_paint);
 150   picture = skia::AdoptRef(recorder.endRecordingAsPicture());
 151   list->AppendItem(DrawingDisplayItem::Create(picture));
 152
 153   gfx::Transform transform;
 154   transform.Rotate(45.0);
 155   list->AppendItem(TransformDisplayItem::Create(transform));
 156
 157   gfx::PointF second_offset(2.f, 3.f);
 158   gfx::RectF second_recording_rect(second_offset, layer_rect.size());
 159   canvas = skia::SharePtr(
 160       recorder.beginRecording(gfx::RectFToSkRect(second_recording_rect)));
 161   canvas->translate(second_offset.x(), second_offset.y());
 162   canvas->drawRectCoords(50.f, 50.f, 75.f, 75.f, blue_paint);
 163   picture = skia::AdoptRef(recorder.endRecordingAsPicture());
 164   list->AppendItem(DrawingDisplayItem::Create(picture));
 165
 166   list->AppendItem(EndTransformDisplayItem::Create());
 167   list->CreateAndCacheSkPicture();
 168
 169   DrawDisplayList(pixels, layer_rect, list);
 170
 171   SkBitmap expected_bitmap;
 172   unsigned char expected_pixels[4 * 100 * 100] = {0};
 173   SkImageInfo info =
 174       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
 175   expected_bitmap.installPixels(info, expected_pixels, info.minRowBytes());
 176   SkCanvas expected_canvas(expected_bitmap);
 177   expected_canvas.clipRect(gfx::RectToSkRect(layer_rect));
 178   expected_canvas.drawRectCoords(0.f + first_offset.x(), 0.f + first_offset.y(),
 179                                  60.f + first_offset.x(),
 180                                  60.f + first_offset.y(), red_paint);
 181   expected_canvas.setMatrix(transform.matrix());
 182   expected_canvas.drawRectCoords(
 183       50.f + second_offset.x(), 50.f + second_offset.y(),
 184       75.f + second_offset.x(), 75.f + second_offset.y(), blue_paint);
 185
 186   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
 187 }
 188
 189 TEST(DisplayItemListTest, FilterItem) {
 190   gfx::Rect layer_rect(100, 100);
 191   FilterOperations filters;
 192   unsigned char pixels[4 * 100 * 100] = {0};
 193   const bool use_cached_picture = true;
 194   scoped_refptr<DisplayItemList> list =
 195       DisplayItemList::Create(layer_rect, use_cached_picture);
 196
 197   SkBitmap source_bitmap;
 198   source_bitmap.allocN32Pixels(50, 50);
 199   SkCanvas source_canvas(source_bitmap);
 200   source_canvas.clear(SkColorSetRGB(128, 128, 128));
 201
 202   // For most SkImageFilters, the |dst| bounds computed by computeFastBounds are
 203   // dependent on the provided |src| bounds. This means, for example, that
 204   // translating |src| results in a corresponding translation of |dst|. But this
 205   // is not the case for all SkImageFilters; for some of them (e.g.
 206   // SkBitmapSource), the computation of |dst| in computeFastBounds doesn't
 207   // involve |src| at all. Incorrectly assuming such a relationship (e.g. by
 208   // translating |dst| after it is computed by computeFastBounds, rather than
 209   // translating |src| before it provided to computedFastBounds) can cause
 210   // incorrect clipping of filter output. To test for this, we include an
 211   // SkBitmapSource filter in |filters|. Here, |src| is |filter_bounds|, defined
 212   // below.
 213   skia::RefPtr<SkImageFilter> image_filter =
 214       skia::AdoptRef(SkBitmapSource::Create(source_bitmap));
 215   filters.Append(FilterOperation::CreateReferenceFilter(image_filter));
 216   filters.Append(FilterOperation::CreateBrightnessFilter(0.5f));
 217   gfx::RectF filter_bounds(10.f, 10.f, 50.f, 50.f);
 218   list->AppendItem(FilterDisplayItem::Create(filters, filter_bounds));
 219   list->AppendItem(EndFilterDisplayItem::Create());
 220   list->CreateAndCacheSkPicture();
 221
 222   DrawDisplayList(pixels, layer_rect, list);
 223
 224   SkBitmap expected_bitmap;
 225   unsigned char expected_pixels[4 * 100 * 100] = {0};
 226   SkPaint paint;
 227   paint.setColor(SkColorSetRGB(64, 64, 64));
 228   SkImageInfo info =
 229       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
 230   expected_bitmap.installPixels(info, expected_pixels, info.minRowBytes());
 231   SkCanvas expected_canvas(expected_bitmap);
 232   expected_canvas.drawRect(RectFToSkRect(filter_bounds), paint);
 233
 234   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
 235 }
 236
 237 TEST(DisplayItemListTest, CompactingItems) {
 238   gfx::Rect layer_rect(100, 100);
 239   SkPictureRecorder recorder;
 240   skia::RefPtr<SkCanvas> canvas;
 241   skia::RefPtr<SkPicture> picture;
 242   SkPaint blue_paint;
 243   blue_paint.setColor(SK_ColorBLUE);
 244   SkPaint red_paint;
 245   red_paint.setColor(SK_ColorRED);
 246   unsigned char pixels[4 * 100 * 100] = {0};
 247
 248   gfx::PointF offset(8.f, 9.f);
 249   gfx::RectF recording_rect(offset, layer_rect.size());
 250
 251   bool use_cached_picture = false;
 252   scoped_refptr<DisplayItemList> list_without_caching =
 253       DisplayItemList::Create(layer_rect, use_cached_picture);
 254
 255   canvas = skia::SharePtr(
 256       recorder.beginRecording(gfx::RectFToSkRect(recording_rect)));
 257   canvas->translate(offset.x(), offset.y());
 258   canvas->drawRectCoords(0.f, 0.f, 60.f, 60.f, red_paint);
 259   canvas->drawRectCoords(50.f, 50.f, 75.f, 75.f, blue_paint);
 260   picture = skia::AdoptRef(recorder.endRecordingAsPicture());
 261   list_without_caching->AppendItem(DrawingDisplayItem::Create(picture));
 262   DrawDisplayList(pixels, layer_rect, list_without_caching);
 263
 264   unsigned char expected_pixels[4 * 100 * 100] = {0};
 265   use_cached_picture = true;
 266   scoped_refptr<DisplayItemList> list_with_caching =
 267       DisplayItemList::Create(layer_rect, use_cached_picture);
 268   list_with_caching->AppendItem(DrawingDisplayItem::Create(picture));
 269   list_with_caching->CreateAndCacheSkPicture();
 270   DrawDisplayList(expected_pixels, layer_rect, list_with_caching);
 271
 272   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
 273 }
 274
 275 TEST(DisplayItemListTest, PictureMemoryUsage) {
 276   scoped_refptr<DisplayItemList> list;
 277   size_t memory_usage;
 278
 279   // Make an SkPicture whose size is known.
 280   gfx::Rect layer_rect(100, 100);
 281   SkPictureRecorder recorder;
 282   SkPaint blue_paint;
 283   blue_paint.setColor(SK_ColorBLUE);
 284   SkCanvas* canvas = recorder.beginRecording(gfx::RectFToSkRect(layer_rect));
 285   for (int i = 0; i < 100; i++)
 286     canvas->drawPaint(blue_paint);
 287   skia::RefPtr<SkPicture> picture =
 288       skia::AdoptRef(recorder.endRecordingAsPicture());
 289   size_t picture_size = SkPictureUtils::ApproximateBytesUsed(picture.get());
 290   ASSERT_GE(picture_size, 100 * sizeof(SkPaint));
 291   ASSERT_LE(picture_size, 200 * sizeof(SkPaint));
 292
 293   // Using a cached picture, we should get about the right size.
 294   list = DisplayItemList::Create(layer_rect, true);
 295   list->AppendItem(DrawingDisplayItem::Create(picture));
 296   list->CreateAndCacheSkPicture();
 297   memory_usage = list->PictureMemoryUsage();
 298   EXPECT_GE(memory_usage, picture_size);
 299   EXPECT_LE(memory_usage, 2 * picture_size);
 300
 301   // Using no cached picture, we should still get the right size.
 302   list = DisplayItemList::Create(layer_rect, false);
 303   list->AppendItem(DrawingDisplayItem::Create(picture));
 304   memory_usage = list->PictureMemoryUsage();
 305   EXPECT_GE(memory_usage, picture_size);
 306   EXPECT_LE(memory_usage, 2 * picture_size);
 307
 308   // To avoid double counting, we expect zero size to be computed if both the
 309   // picture and items are retained (currently this only happens due to certain
 310   // categories being traced).
 311   list = new DisplayItemList(layer_rect, true, true);
 312   list->AppendItem(DrawingDisplayItem::Create(picture));
 313   list->CreateAndCacheSkPicture();
 314   memory_usage = list->PictureMemoryUsage();
 315   EXPECT_EQ(static_cast<size_t>(0), memory_usage);
 316 }
 317
 318 }  // namespace cc