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 "ui/gfx/skia_util.h"
  24
  25 namespace cc {
  26 namespace {
  27
  28 TEST(DisplayItemListTest, SingleDrawingItem) {
  29   gfx::Rect layer_rect(100, 100);
  30   SkPictureRecorder recorder;
  31   skia::RefPtr<SkCanvas> canvas;
  32   skia::RefPtr<SkPicture> picture;
  33   SkPaint blue_paint;
  34   blue_paint.setColor(SK_ColorBLUE);
  35   SkPaint red_paint;
  36   red_paint.setColor(SK_ColorRED);
  37   unsigned char pixels[4 * 100 * 100] = {0};
  38   scoped_refptr<DisplayItemList> list = DisplayItemList::Create();
  39
  40   gfx::PointF offset(8.f, 9.f);
  41   gfx::RectF recording_rect(offset, layer_rect.size());
  42   canvas = skia::SharePtr(
  43       recorder.beginRecording(gfx::RectFToSkRect(recording_rect)));
  44   canvas->translate(offset.x(), offset.y());
  45   canvas->drawRectCoords(0.f, 0.f, 60.f, 60.f, red_paint);
  46   canvas->drawRectCoords(50.f, 50.f, 75.f, 75.f, blue_paint);
  47   picture = skia::AdoptRef(recorder.endRecording());
  48   list->AppendItem(DrawingDisplayItem::Create(picture));
  49   DrawDisplayList(pixels, layer_rect, list);
  50
  51   SkBitmap expected_bitmap;
  52   unsigned char expected_pixels[4 * 100 * 100] = {0};
  53   SkImageInfo info =
  54       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
  55   expected_bitmap.installPixels(info, expected_pixels, info.minRowBytes());
  56   SkCanvas expected_canvas(expected_bitmap);
  57   expected_canvas.clipRect(gfx::RectToSkRect(layer_rect));
  58   expected_canvas.drawRectCoords(0.f + offset.x(), 0.f + offset.y(),
  59                                  60.f + offset.x(), 60.f + offset.y(),
  60                                  red_paint);
  61   expected_canvas.drawRectCoords(50.f + offset.x(), 50.f + offset.y(),
  62                                  75.f + offset.x(), 75.f + offset.y(),
  63                                  blue_paint);
  64
  65   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
  66 }
  67
  68 TEST(DisplayItemListTest, ClipItem) {
  69   gfx::Rect layer_rect(100, 100);
  70   SkPictureRecorder recorder;
  71   skia::RefPtr<SkCanvas> canvas;
  72   skia::RefPtr<SkPicture> picture;
  73   SkPaint blue_paint;
  74   blue_paint.setColor(SK_ColorBLUE);
  75   SkPaint red_paint;
  76   red_paint.setColor(SK_ColorRED);
  77   unsigned char pixels[4 * 100 * 100] = {0};
  78   scoped_refptr<DisplayItemList> list = DisplayItemList::Create();
  79
  80   gfx::PointF first_offset(8.f, 9.f);
  81   gfx::RectF first_recording_rect(first_offset, layer_rect.size());
  82   canvas = skia::SharePtr(
  83       recorder.beginRecording(gfx::RectFToSkRect(first_recording_rect)));
  84   canvas->translate(first_offset.x(), first_offset.y());
  85   canvas->drawRectCoords(0.f, 0.f, 60.f, 60.f, red_paint);
  86   picture = skia::AdoptRef(recorder.endRecording());
  87   list->AppendItem(DrawingDisplayItem::Create(picture));
  88
  89   gfx::Rect clip_rect(60, 60, 10, 10);
  90   list->AppendItem(ClipDisplayItem::Create(clip_rect, std::vector<SkRRect>()));
  91
  92   gfx::PointF second_offset(2.f, 3.f);
  93   gfx::RectF second_recording_rect(second_offset, layer_rect.size());
  94   canvas = skia::SharePtr(
  95       recorder.beginRecording(gfx::RectFToSkRect(second_recording_rect)));
  96   canvas->translate(second_offset.x(), second_offset.y());
  97   canvas->drawRectCoords(50.f, 50.f, 75.f, 75.f, blue_paint);
  98   picture = skia::AdoptRef(recorder.endRecording());
  99   list->AppendItem(DrawingDisplayItem::Create(picture));
 100
 101   list->AppendItem(EndClipDisplayItem::Create());
 102
 103   DrawDisplayList(pixels, layer_rect, list);
 104
 105   SkBitmap expected_bitmap;
 106   unsigned char expected_pixels[4 * 100 * 100] = {0};
 107   SkImageInfo info =
 108       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
 109   expected_bitmap.installPixels(info, expected_pixels, info.minRowBytes());
 110   SkCanvas expected_canvas(expected_bitmap);
 111   expected_canvas.clipRect(gfx::RectToSkRect(layer_rect));
 112   expected_canvas.drawRectCoords(0.f + first_offset.x(), 0.f + first_offset.y(),
 113                                  60.f + first_offset.x(),
 114                                  60.f + first_offset.y(), red_paint);
 115   expected_canvas.clipRect(gfx::RectToSkRect(clip_rect));
 116   expected_canvas.drawRectCoords(
 117       50.f + second_offset.x(), 50.f + second_offset.y(),
 118       75.f + second_offset.x(), 75.f + second_offset.y(), blue_paint);
 119
 120   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
 121 }
 122
 123 TEST(DisplayItemListTest, TransformItem) {
 124   gfx::Rect layer_rect(100, 100);
 125   SkPictureRecorder recorder;
 126   skia::RefPtr<SkCanvas> canvas;
 127   skia::RefPtr<SkPicture> picture;
 128   SkPaint blue_paint;
 129   blue_paint.setColor(SK_ColorBLUE);
 130   SkPaint red_paint;
 131   red_paint.setColor(SK_ColorRED);
 132   unsigned char pixels[4 * 100 * 100] = {0};
 133   scoped_refptr<DisplayItemList> list = DisplayItemList::Create();
 134
 135   gfx::PointF first_offset(8.f, 9.f);
 136   gfx::RectF first_recording_rect(first_offset, layer_rect.size());
 137   canvas = skia::SharePtr(
 138       recorder.beginRecording(gfx::RectFToSkRect(first_recording_rect)));
 139   canvas->translate(first_offset.x(), first_offset.y());
 140   canvas->drawRectCoords(0.f, 0.f, 60.f, 60.f, red_paint);
 141   picture = skia::AdoptRef(recorder.endRecording());
 142   list->AppendItem(DrawingDisplayItem::Create(picture));
 143
 144   gfx::Transform transform;
 145   transform.Rotate(45.0);
 146   list->AppendItem(TransformDisplayItem::Create(transform));
 147
 148   gfx::PointF second_offset(2.f, 3.f);
 149   gfx::RectF second_recording_rect(second_offset, layer_rect.size());
 150   canvas = skia::SharePtr(
 151       recorder.beginRecording(gfx::RectFToSkRect(second_recording_rect)));
 152   canvas->translate(second_offset.x(), second_offset.y());
 153   canvas->drawRectCoords(50.f, 50.f, 75.f, 75.f, blue_paint);
 154   picture = skia::AdoptRef(recorder.endRecording());
 155   list->AppendItem(DrawingDisplayItem::Create(picture));
 156
 157   list->AppendItem(EndTransformDisplayItem::Create());
 158
 159   DrawDisplayList(pixels, layer_rect, list);
 160
 161   SkBitmap expected_bitmap;
 162   unsigned char expected_pixels[4 * 100 * 100] = {0};
 163   SkImageInfo info =
 164       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
 165   expected_bitmap.installPixels(info, expected_pixels, info.minRowBytes());
 166   SkCanvas expected_canvas(expected_bitmap);
 167   expected_canvas.clipRect(gfx::RectToSkRect(layer_rect));
 168   expected_canvas.drawRectCoords(0.f + first_offset.x(), 0.f + first_offset.y(),
 169                                  60.f + first_offset.x(),
 170                                  60.f + first_offset.y(), red_paint);
 171   expected_canvas.setMatrix(transform.matrix());
 172   expected_canvas.drawRectCoords(
 173       50.f + second_offset.x(), 50.f + second_offset.y(),
 174       75.f + second_offset.x(), 75.f + second_offset.y(), blue_paint);
 175
 176   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
 177 }
 178
 179 TEST(DisplayItemList, FilterItem) {
 180   gfx::Rect layer_rect(100, 100);
 181   FilterOperations filters;
 182   unsigned char pixels[4 * 100 * 100] = {0};
 183   scoped_refptr<DisplayItemList> list = DisplayItemList::Create();
 184
 185   SkBitmap source_bitmap;
 186   source_bitmap.allocN32Pixels(50, 50);
 187   SkCanvas source_canvas(source_bitmap);
 188   source_canvas.clear(SkColorSetRGB(128, 128, 128));
 189
 190   // For most SkImageFilters, the |dst| bounds computed by computeFastBounds are
 191   // dependent on the provided |src| bounds. This means, for example, that
 192   // translating |src| results in a corresponding translation of |dst|. But this
 193   // is not the case for all SkImageFilters; for some of them (e.g.
 194   // SkBitmapSource), the computation of |dst| in computeFastBounds doesn't
 195   // involve |src| at all. Incorrectly assuming such a relationship (e.g. by
 196   // translating |dst| after it is computed by computeFastBounds, rather than
 197   // translating |src| before it provided to computedFastBounds) can cause
 198   // incorrect clipping of filter output. To test for this, we include an
 199   // SkBitmapSource filter in |filters|. Here, |src| is |filter_bounds|, defined
 200   // below.
 201   skia::RefPtr<SkImageFilter> image_filter =
 202       skia::AdoptRef(SkBitmapSource::Create(source_bitmap));
 203   filters.Append(FilterOperation::CreateReferenceFilter(image_filter));
 204   filters.Append(FilterOperation::CreateBrightnessFilter(0.5f));
 205   gfx::RectF filter_bounds(10.f, 10.f, 50.f, 50.f);
 206   list->AppendItem(FilterDisplayItem::Create(filters, filter_bounds));
 207   list->AppendItem(EndFilterDisplayItem::Create());
 208
 209   DrawDisplayList(pixels, layer_rect, list);
 210
 211   SkBitmap expected_bitmap;
 212   unsigned char expected_pixels[4 * 100 * 100] = {0};
 213   SkPaint paint;
 214   paint.setColor(SkColorSetRGB(64, 64, 64));
 215   SkImageInfo info =
 216       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
 217   expected_bitmap.installPixels(info, expected_pixels, info.minRowBytes());
 218   SkCanvas expected_canvas(expected_bitmap);
 219   expected_canvas.drawRect(RectFToSkRect(filter_bounds), paint);
 220
 221   EXPECT_EQ(0, memcmp(pixels, expected_pixels, 4 * 100 * 100));
 222 }
 223
 224 }  // namespace
 225 }  // namespace cc