// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/resources/picture_layer_tiling.h"
#include <limits>
#include "cc/base/math_util.h"
#include "cc/resources/picture_layer_tiling_set.h"
#include "cc/test/fake_picture_layer_tiling_client.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/rect_conversions.h"
#include "ui/gfx/size_conversions.h"
namespace cc {
namespace {
static gfx::Rect ViewportInLayerSpace(
const gfx::Transform& transform,
gfx::Size device_viewport) {
gfx::Transform inverse;
if (!transform.GetInverse(&inverse))
return gfx::Rect();
gfx::RectF viewport_in_layer_space = MathUtil::ProjectClippedRect(
inverse, gfx::RectF(gfx::Point(0, 0), device_viewport));
return ToEnclosingRect(viewport_in_layer_space);
}
class TestablePictureLayerTiling : public PictureLayerTiling {
public:
using PictureLayerTiling::SetLiveTilesRect;
using PictureLayerTiling::TileAt;
static scoped_ptr<TestablePictureLayerTiling> Create(
float contents_scale,
gfx::Size layer_bounds,
PictureLayerTilingClient* client) {
return make_scoped_ptr(new TestablePictureLayerTiling(
contents_scale,
layer_bounds,
client));
}
protected:
TestablePictureLayerTiling(float contents_scale,
gfx::Size layer_bounds,
PictureLayerTilingClient* client)
: PictureLayerTiling(contents_scale, layer_bounds, client) { }
};
class PictureLayerTilingIteratorTest : public testing::Test {
public:
PictureLayerTilingIteratorTest() {}
virtual ~PictureLayerTilingIteratorTest() {}
void Initialize(gfx::Size tile_size,
float contents_scale,
gfx::Size layer_bounds) {
client_.SetTileSize(tile_size);
tiling_ = TestablePictureLayerTiling::Create(contents_scale,
layer_bounds,
&client_);
}
void SetLiveRectAndVerifyTiles(gfx::Rect live_tiles_rect) {
tiling_->SetLiveTilesRect(live_tiles_rect);
std::vector<Tile*> tiles = tiling_->AllTilesForTesting();
for (std::vector<Tile*>::iterator iter = tiles.begin();
iter != tiles.end();
++iter) {
EXPECT_TRUE(live_tiles_rect.Intersects((*iter)->content_rect()));
}
}
void VerifyTilesExactlyCoverRect(
float rect_scale,
gfx::Rect request_rect,
gfx::Rect expect_rect) {
EXPECT_TRUE(request_rect.Contains(expect_rect));
// Iterators are not valid if this ratio is too large (i.e. the
// tiling is too high-res for a low-res destination rect.) This is an
// artifact of snapping geometry to integer coordinates and then mapping
// back to floating point texture coordinates.
float dest_to_contents_scale = tiling_->contents_scale() / rect_scale;
ASSERT_LE(dest_to_contents_scale, 2.0);
Region remaining = expect_rect;
for (PictureLayerTiling::CoverageIterator
iter(tiling_.get(), rect_scale, request_rect);
iter;
++iter) {
// Geometry cannot overlap previous geometry at all
gfx::Rect geometry = iter.geometry_rect();
EXPECT_TRUE(expect_rect.Contains(geometry));
EXPECT_TRUE(remaining.Contains(geometry));
remaining.Subtract(geometry);
// Sanity check that texture coords are within the texture rect.
gfx::RectF texture_rect = iter.texture_rect();
EXPECT_GE(texture_rect.x(), 0);
EXPECT_GE(texture_rect.y(), 0);
EXPECT_LE(texture_rect.right(), client_.TileSize().width());
EXPECT_LE(texture_rect.bottom(), client_.TileSize().height());
EXPECT_EQ(iter.texture_size(), client_.TileSize());
}
// The entire rect must be filled by geometry from the tiling.
EXPECT_TRUE(remaining.IsEmpty());
}
void VerifyTilesExactlyCoverRect(float rect_scale, gfx::Rect rect) {
VerifyTilesExactlyCoverRect(rect_scale, rect, rect);
}
void VerifyTiles(
float rect_scale,
gfx::Rect rect,
base::Callback<void(Tile* tile, gfx::Rect geometry_rect)> callback) {
VerifyTiles(tiling_.get(),
rect_scale,
rect,
callback);
}
void VerifyTiles(
PictureLayerTiling* tiling,
float rect_scale,
gfx::Rect rect,
base::Callback<void(Tile* tile, gfx::Rect geometry_rect)> callback) {
Region remaining = rect;
for (PictureLayerTiling::CoverageIterator iter(tiling, rect_scale, rect);
iter;
++iter) {
remaining.Subtract(iter.geometry_rect());
callback.Run(*iter, iter.geometry_rect());
}
EXPECT_TRUE(remaining.IsEmpty());
}
void VerifyTilesCoverNonContainedRect(float rect_scale, gfx::Rect dest_rect) {
float dest_to_contents_scale = tiling_->contents_scale() / rect_scale;
gfx::Rect clamped_rect = gfx::ScaleToEnclosingRect(
tiling_->ContentRect(), 1.f / dest_to_contents_scale);
clamped_rect.Intersect(dest_rect);
VerifyTilesExactlyCoverRect(rect_scale, dest_rect, clamped_rect);
}
protected:
FakePictureLayerTilingClient client_;
scoped_ptr<TestablePictureLayerTiling> tiling_;
private:
DISALLOW_COPY_AND_ASSIGN(PictureLayerTilingIteratorTest);
};
TEST_F(PictureLayerTilingIteratorTest, LiveTilesExactlyCoverLiveTileRect) {
Initialize(gfx::Size(100, 100), 1, gfx::Size(1099, 801));
SetLiveRectAndVerifyTiles(gfx::Rect(100, 100));
SetLiveRectAndVerifyTiles(gfx::Rect(101, 99));
SetLiveRectAndVerifyTiles(gfx::Rect(1099, 1));
SetLiveRectAndVerifyTiles(gfx::Rect(1, 801));
SetLiveRectAndVerifyTiles(gfx::Rect(1099, 1));
SetLiveRectAndVerifyTiles(gfx::Rect(201, 800));
}
TEST_F(PictureLayerTilingIteratorTest, IteratorCoversLayerBoundsNoScale) {
Initialize(gfx::Size(100, 100), 1, gfx::Size(1099, 801));
VerifyTilesExactlyCoverRect(1, gfx::Rect());
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 1099, 801));
VerifyTilesExactlyCoverRect(1, gfx::Rect(52, 83, 789, 412));
// With borders, a size of 3x3 = 1 pixel of content.
Initialize(gfx::Size(3, 3), 1, gfx::Size(10, 10));
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 1, 1));
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 2, 2));
VerifyTilesExactlyCoverRect(1, gfx::Rect(1, 1, 2, 2));
VerifyTilesExactlyCoverRect(1, gfx::Rect(3, 2, 5, 2));
}
TEST_F(PictureLayerTilingIteratorTest, IteratorCoversLayerBoundsTilingScale) {
Initialize(gfx::Size(200, 100), 2.0f, gfx::Size(1005, 2010));
VerifyTilesExactlyCoverRect(1, gfx::Rect());
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 1005, 2010));
VerifyTilesExactlyCoverRect(1, gfx::Rect(50, 112, 512, 381));
Initialize(gfx::Size(3, 3), 2.0f, gfx::Size(10, 10));
VerifyTilesExactlyCoverRect(1, gfx::Rect());
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 1, 1));
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 2, 2));
VerifyTilesExactlyCoverRect(1, gfx::Rect(1, 1, 2, 2));
VerifyTilesExactlyCoverRect(1, gfx::Rect(3, 2, 5, 2));
Initialize(gfx::Size(100, 200), 0.5f, gfx::Size(1005, 2010));
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 1005, 2010));
VerifyTilesExactlyCoverRect(1, gfx::Rect(50, 112, 512, 381));
Initialize(gfx::Size(150, 250), 0.37f, gfx::Size(1005, 2010));
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 1005, 2010));
VerifyTilesExactlyCoverRect(1, gfx::Rect(50, 112, 512, 381));
Initialize(gfx::Size(312, 123), 0.01f, gfx::Size(1005, 2010));
VerifyTilesExactlyCoverRect(1, gfx::Rect(0, 0, 1005, 2010));
VerifyTilesExactlyCoverRect(1, gfx::Rect(50, 112, 512, 381));
}
TEST_F(PictureLayerTilingIteratorTest, IteratorCoversLayerBoundsBothScale) {
Initialize(gfx::Size(50, 50), 4.0f, gfx::Size(800, 600));
VerifyTilesExactlyCoverRect(2.0f, gfx::Rect());
VerifyTilesExactlyCoverRect(2.0f, gfx::Rect(0, 0, 1600, 1200));
VerifyTilesExactlyCoverRect(2.0f, gfx::Rect(512, 365, 253, 182));
float scale = 6.7f;
gfx::Size bounds(800, 600);
gfx::Rect full_rect(gfx::ToCeiledSize(gfx::ScaleSize(bounds, scale)));
Initialize(gfx::Size(256, 512), 5.2f, bounds);
VerifyTilesExactlyCoverRect(scale, full_rect);
VerifyTilesExactlyCoverRect(scale, gfx::Rect(2014, 1579, 867, 1033));
}
TEST_F(PictureLayerTilingIteratorTest, IteratorEmptyRect) {
Initialize(gfx::Size(100, 100), 1.0f, gfx::Size(800, 600));
gfx::Rect empty;
PictureLayerTiling::CoverageIterator iter(tiling_.get(), 1.0f, empty);
EXPECT_FALSE(iter);
}
TEST_F(PictureLayerTilingIteratorTest, NonIntersectingRect) {
Initialize(gfx::Size(100, 100), 1.0f, gfx::Size(800, 600));
gfx::Rect non_intersecting(1000, 1000, 50, 50);
PictureLayerTiling::CoverageIterator iter(tiling_.get(), 1, non_intersecting);
EXPECT_FALSE(iter);
}
TEST_F(PictureLayerTilingIteratorTest, LayerEdgeTextureCoordinates) {
Initialize(gfx::Size(300, 300), 1.0f, gfx::Size(256, 256));
// All of these sizes are 256x256, scaled and ceiled.
VerifyTilesExactlyCoverRect(1.0f, gfx::Rect(0, 0, 256, 256));
VerifyTilesExactlyCoverRect(0.8f, gfx::Rect(0, 0, 205, 205));
VerifyTilesExactlyCoverRect(1.2f, gfx::Rect(0, 0, 308, 308));
}
TEST_F(PictureLayerTilingIteratorTest, NonContainedDestRect) {
Initialize(gfx::Size(100, 100), 1.0f, gfx::Size(400, 400));
// Too large in all dimensions
VerifyTilesCoverNonContainedRect(1.0f, gfx::Rect(-1000, -1000, 2000, 2000));
VerifyTilesCoverNonContainedRect(1.5f, gfx::Rect(-1000, -1000, 2000, 2000));
VerifyTilesCoverNonContainedRect(0.5f, gfx::Rect(-1000, -1000, 2000, 2000));
// Partially covering content, but too large
VerifyTilesCoverNonContainedRect(1.0f, gfx::Rect(-1000, 100, 2000, 100));
VerifyTilesCoverNonContainedRect(1.5f, gfx::Rect(-1000, 100, 2000, 100));
VerifyTilesCoverNonContainedRect(0.5f, gfx::Rect(-1000, 100, 2000, 100));
}
TEST(PictureLayerTilingTest, ExpandRectEqual) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(-1000, -1000, 10000, 10000);
int64 target_area = 100 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(in.ToString(), out.ToString());
}
TEST(PictureLayerTilingTest, ExpandRectSmaller) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(-1000, -1000, 10000, 10000);
int64 target_area = 100 * 100;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(out.bottom() - in.bottom(), in.y() - out.y());
EXPECT_EQ(out.right() - in.right(), in.x() - out.x());
EXPECT_EQ(out.width() - in.width(), out.height() - in.height());
EXPECT_NEAR(100 * 100, out.width() * out.height(), 50);
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, ExpandRectUnbounded) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(-1000, -1000, 10000, 10000);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(out.bottom() - in.bottom(), in.y() - out.y());
EXPECT_EQ(out.right() - in.right(), in.x() - out.x());
EXPECT_EQ(out.width() - in.width(), out.height() - in.height());
EXPECT_NEAR(200 * 200, out.width() * out.height(), 100);
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, ExpandRectBoundedSmaller) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(50, 60, 40, 30);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(bounds.ToString(), out.ToString());
}
TEST(PictureLayerTilingTest, ExpandRectBoundedEqual) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds = in;
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(bounds.ToString(), out.ToString());
}
TEST(PictureLayerTilingTest, ExpandRectBoundedSmallerStretchVertical) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(45, 0, 90, 300);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(bounds.ToString(), out.ToString());
}
TEST(PictureLayerTilingTest, ExpandRectBoundedEqualStretchVertical) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(40, 0, 100, 300);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(bounds.ToString(), out.ToString());
}
TEST(PictureLayerTilingTest, ExpandRectBoundedSmallerStretchHorizontal) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(0, 55, 180, 190);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(bounds.ToString(), out.ToString());
}
TEST(PictureLayerTilingTest, ExpandRectBoundedEqualStretchHorizontal) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(0, 50, 180, 200);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(bounds.ToString(), out.ToString());
}
TEST(PictureLayerTilingTest, ExpandRectBoundedLeft) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(20, -1000, 10000, 10000);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(out.bottom() - in.bottom(), in.y() - out.y());
EXPECT_EQ(out.bottom() - in.bottom(), out.right() - in.right());
EXPECT_LE(out.width() * out.height(), target_area);
EXPECT_GT(out.width() * out.height(),
target_area - out.width() - out.height() * 2);
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, ExpandRectBoundedRight) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(-1000, -1000, 1000+120, 10000);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(out.bottom() - in.bottom(), in.y() - out.y());
EXPECT_EQ(out.bottom() - in.bottom(), in.x() - out.x());
EXPECT_LE(out.width() * out.height(), target_area);
EXPECT_GT(out.width() * out.height(),
target_area - out.width() - out.height() * 2);
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, ExpandRectBoundedTop) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(-1000, 30, 10000, 10000);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(out.right() - in.right(), in.x() - out.x());
EXPECT_EQ(out.right() - in.right(), out.bottom() - in.bottom());
EXPECT_LE(out.width() * out.height(), target_area);
EXPECT_GT(out.width() * out.height(),
target_area - out.width() * 2 - out.height());
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, ExpandRectBoundedBottom) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(-1000, -1000, 10000, 1000 + 220);
int64 target_area = 200 * 200;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(out.right() - in.right(), in.x() - out.x());
EXPECT_EQ(out.right() - in.right(), in.y() - out.y());
EXPECT_LE(out.width() * out.height(), target_area);
EXPECT_GT(out.width() * out.height(),
target_area - out.width() * 2 - out.height());
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, ExpandRectSquishedHorizontally) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(0, -4000, 100+40+20, 100000);
int64 target_area = 400 * 400;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(20, out.right() - in.right());
EXPECT_EQ(40, in.x() - out.x());
EXPECT_EQ(out.bottom() - in.bottom(), in.y() - out.y());
EXPECT_LE(out.width() * out.height(), target_area);
EXPECT_GT(out.width() * out.height(),
target_area - out.width() * 2);
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, ExpandRectSquishedVertically) {
gfx::Rect in(40, 50, 100, 200);
gfx::Rect bounds(-4000, 0, 100000, 200+50+30);
int64 target_area = 400 * 400;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(30, out.bottom() - in.bottom());
EXPECT_EQ(50, in.y() - out.y());
EXPECT_EQ(out.right() - in.right(), in.x() - out.x());
EXPECT_LE(out.width() * out.height(), target_area);
EXPECT_GT(out.width() * out.height(),
target_area - out.height() * 2);
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, ExpandRectOutOfBoundsFarAway) {
gfx::Rect in(400, 500, 100, 200);
gfx::Rect bounds(0, 0, 10, 10);
int64 target_area = 400 * 400;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_TRUE(out.IsEmpty());
}
TEST(PictureLayerTilingTest, ExpandRectOutOfBoundsExpandedFullyCover) {
gfx::Rect in(40, 50, 100, 100);
gfx::Rect bounds(0, 0, 10, 10);
int64 target_area = 400 * 400;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(bounds.ToString(), out.ToString());
}
TEST(PictureLayerTilingTest, ExpandRectOutOfBoundsExpandedPartlyCover) {
gfx::Rect in(600, 600, 100, 100);
gfx::Rect bounds(0, 0, 500, 500);
int64 target_area = 400 * 400;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_EQ(bounds.right(), out.right());
EXPECT_EQ(bounds.bottom(), out.bottom());
EXPECT_LE(out.width() * out.height(), target_area);
EXPECT_GT(out.width() * out.height(),
target_area - out.width() - out.height());
EXPECT_TRUE(bounds.Contains(out));
}
TEST(PictureLayerTilingTest, EmptyStartingRect) {
// If a layer has a non-invertible transform, then the starting rect
// for the layer would be empty.
gfx::Rect in(40, 40, 0, 0);
gfx::Rect bounds(0, 0, 10, 10);
int64 target_area = 400 * 400;
gfx::Rect out = PictureLayerTiling::ExpandRectEquallyToAreaBoundedBy(
in, target_area, bounds, NULL);
EXPECT_TRUE(out.IsEmpty());
}
static void TileExists(bool exists, Tile* tile, gfx::Rect geometry_rect) {
EXPECT_EQ(exists, tile != NULL) << geometry_rect.ToString();
}
TEST_F(PictureLayerTilingIteratorTest, TilesExist) {
gfx::Size layer_bounds(1099, 801);
Initialize(gfx::Size(100, 100), 1.f, layer_bounds);
VerifyTilesExactlyCoverRect(1.f, gfx::Rect(layer_bounds));
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, false));
tiling_->UpdateTilePriorities(
ACTIVE_TREE,
layer_bounds, // device viewport
gfx::Rect(layer_bounds), // viewport in layer space
gfx::Rect(layer_bounds), // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
1.0, // current frame time
10000); // max tiles in tile manager
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, true));
// Make the viewport rect empty. All tiles are killed and become zombies.
tiling_->UpdateTilePriorities(
ACTIVE_TREE,
layer_bounds, // device viewport
gfx::Rect(), // viewport in layer space
gfx::Rect(), // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
2.0, // current frame time
10000); // max tiles in tile manager
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, false));
}
TEST_F(PictureLayerTilingIteratorTest, TilesExistGiantViewport) {
gfx::Size layer_bounds(1099, 801);
Initialize(gfx::Size(100, 100), 1.f, layer_bounds);
VerifyTilesExactlyCoverRect(1.f, gfx::Rect(layer_bounds));
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, false));
gfx::Rect giant_rect(-10000000, -10000000, 1000000000, 1000000000);
tiling_->UpdateTilePriorities(
ACTIVE_TREE,
layer_bounds, // device viewport
giant_rect, // viewport in layer space
gfx::Rect(layer_bounds), // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
1.0, // current frame time
10000); // max tiles in tile manager
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, true));
// If the visible content rect is empty, it should still have live tiles.
tiling_->UpdateTilePriorities(
ACTIVE_TREE,
layer_bounds, // device viewport
giant_rect, // viewport in layer space
gfx::Rect(), // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
2.0, // current frame time
10000); // max tiles in tile manager
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, true));
}
TEST_F(PictureLayerTilingIteratorTest, TilesExistOutsideViewport) {
gfx::Size layer_bounds(1099, 801);
Initialize(gfx::Size(100, 100), 1.f, layer_bounds);
VerifyTilesExactlyCoverRect(1.f, gfx::Rect(layer_bounds));
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, false));
// This rect does not intersect with the layer, as the layer is outside the
// viewport.
gfx::Rect viewport_rect(1100, 0, 1000, 1000);
EXPECT_FALSE(viewport_rect.Intersects(gfx::Rect(layer_bounds)));
tiling_->UpdateTilePriorities(
ACTIVE_TREE,
layer_bounds, // device viewport
viewport_rect, // viewport in layer space
gfx::Rect(), // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
1.0, // current frame time
10000); // max tiles in tile manager
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, true));
}
static void TilesIntersectingRectExist(gfx::Rect rect,
bool intersect_exists,
Tile* tile,
gfx::Rect geometry_rect) {
bool intersects = rect.Intersects(geometry_rect);
bool expected_exists = intersect_exists ? intersects : !intersects;
EXPECT_EQ(expected_exists, tile != NULL)
<< "Rects intersecting " << rect.ToString() << " should exist. "
<< "Current tile rect is " << geometry_rect.ToString();
}
TEST_F(PictureLayerTilingIteratorTest,
TilesExistLargeViewportAndLayerWithSmallVisibleArea) {
gfx::Size layer_bounds(10000, 10000);
Initialize(gfx::Size(100, 100), 1.f, layer_bounds);
VerifyTilesExactlyCoverRect(1.f, gfx::Rect(layer_bounds));
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, false));
gfx::Rect visible_rect(8000, 8000, 50, 50);
tiling_->UpdateTilePriorities(
ACTIVE_TREE,
layer_bounds, // device viewport
gfx::Rect(layer_bounds), // viewport in layer space
visible_rect, // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
1.0, // current frame time
1); // max tiles in tile manager
VerifyTiles(1.f,
gfx::Rect(layer_bounds),
base::Bind(&TilesIntersectingRectExist, visible_rect, true));
}
static void CountExistingTiles(int *count,
Tile* tile,
gfx::Rect geometry_rect) {
if (tile != NULL)
++(*count);
}
TEST_F(PictureLayerTilingIteratorTest,
TilesExistLargeViewportAndLayerWithLargeVisibleArea) {
gfx::Size layer_bounds(10000, 10000);
Initialize(gfx::Size(100, 100), 1.f, layer_bounds);
VerifyTilesExactlyCoverRect(1.f, gfx::Rect(layer_bounds));
VerifyTiles(1.f, gfx::Rect(layer_bounds), base::Bind(&TileExists, false));
tiling_->UpdateTilePriorities(
ACTIVE_TREE,
layer_bounds, // device viewport
gfx::Rect(layer_bounds), // viewport in layer space
gfx::Rect(layer_bounds), // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
1.0, // current frame time
1); // max tiles in tile manager
int num_tiles = 0;
VerifyTiles(1.f,
gfx::Rect(layer_bounds),
base::Bind(&CountExistingTiles, &num_tiles));
// If we're making a rect the size of one tile, it can only overlap up to 4
// tiles depending on its position.
EXPECT_LE(num_tiles, 4);
VerifyTiles(1.f, gfx::Rect(), base::Bind(&TileExists, false));
}
TEST_F(PictureLayerTilingIteratorTest, AddTilingsToMatchScale) {
gfx::Size layer_bounds(1099, 801);
gfx::Size tile_size(100, 100);
client_.SetTileSize(tile_size);
PictureLayerTilingSet active_set(&client_, layer_bounds);
active_set.AddTiling(1.f);
VerifyTiles(active_set.tiling_at(0),
1.f,
gfx::Rect(layer_bounds),
base::Bind(&TileExists, false));
active_set.UpdateTilePriorities(
PENDING_TREE,
layer_bounds, // device viewport
gfx::Rect(layer_bounds), // viewport in layer space
gfx::Rect(layer_bounds), // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
1.0, // current frame time
10000); // max tiles in tile manager
// The active tiling has tiles now.
VerifyTiles(active_set.tiling_at(0),
1.f,
gfx::Rect(layer_bounds),
base::Bind(&TileExists, true));
// Add the same tilings to the pending set.
PictureLayerTilingSet pending_set(&client_, layer_bounds);
Region invalidation;
pending_set.SyncTilings(active_set, layer_bounds, invalidation, 0.f);
// The pending tiling starts with no tiles.
VerifyTiles(pending_set.tiling_at(0),
1.f,
gfx::Rect(layer_bounds),
base::Bind(&TileExists, false));
// UpdateTilePriorities on the pending tiling at the same frame time. The
// pending tiling should get tiles.
pending_set.UpdateTilePriorities(
PENDING_TREE,
layer_bounds, // device viewport
gfx::Rect(layer_bounds), // viewport in layer space
gfx::Rect(layer_bounds), // visible content rect
layer_bounds, // last layer bounds
layer_bounds, // current layer bounds
1.f, // last contents scale
1.f, // current contents scale
gfx::Transform(), // last screen transform
gfx::Transform(), // current screen transform
1.0, // current frame time
10000); // max tiles in tile manager
VerifyTiles(pending_set.tiling_at(0),
1.f,
gfx::Rect(layer_bounds),
base::Bind(&TileExists, true));
}
TEST(UpdateTilePrioritiesTest, VisibleTiles) {
// The TilePriority of visible tiles should have zero distance_to_visible
// and time_to_visible.
FakePictureLayerTilingClient client;
scoped_ptr<TestablePictureLayerTiling> tiling;
gfx::Size device_viewport(800, 600);
gfx::Rect visible_layer_rect(0, 0, 200, 200);
gfx::Size last_layer_bounds(200, 200);
gfx::Size current_layer_bounds(200, 200);
float last_layer_contents_scale = 1.f;
float current_layer_contents_scale = 1.f;
gfx::Transform last_screen_transform;
gfx::Transform current_screen_transform;
double current_frame_time_in_seconds = 1.0;
size_t max_tiles_for_interest_area = 10000;
gfx::Rect viewport_in_layer_space = ViewportInLayerSpace(
current_screen_transform, device_viewport);
client.SetTileSize(gfx::Size(100, 100));
tiling = TestablePictureLayerTiling::Create(1.0f, // contents_scale
current_layer_bounds,
&client);
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
current_layer_bounds,
last_layer_contents_scale,
current_layer_contents_scale,
last_screen_transform,
current_screen_transform,
current_frame_time_in_seconds,
max_tiles_for_interest_area);
ASSERT_TRUE(tiling->TileAt(0, 0));
ASSERT_TRUE(tiling->TileAt(0, 1));
ASSERT_TRUE(tiling->TileAt(1, 0));
ASSERT_TRUE(tiling->TileAt(1, 1));
TilePriority priority = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
priority = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
}
TEST(UpdateTilePrioritiesTest, OffscreenTiles) {
// The TilePriority of offscreen tiles (without movement) should have nonzero
// distance_to_visible and infinite time_to_visible.
FakePictureLayerTilingClient client;
scoped_ptr<TestablePictureLayerTiling> tiling;
gfx::Size device_viewport(800, 600);
gfx::Rect visible_layer_rect(0, 0, 0, 0); // offscreen; nothing is visible.
gfx::Size last_layer_bounds(200, 200);
gfx::Size current_layer_bounds(200, 200);
float last_layer_contents_scale = 1.f;
float current_layer_contents_scale = 1.f;
gfx::Transform last_screen_transform;
gfx::Transform current_screen_transform;
double current_frame_time_in_seconds = 1.0;
size_t max_tiles_for_interest_area = 10000;
current_screen_transform.Translate(850, 0);
last_screen_transform = current_screen_transform;
gfx::Rect viewport_in_layer_space = ViewportInLayerSpace(
current_screen_transform, device_viewport);
client.SetTileSize(gfx::Size(100, 100));
tiling = TestablePictureLayerTiling::Create(1.0f, // contents_scale
current_layer_bounds,
&client);
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
current_layer_bounds,
last_layer_contents_scale,
current_layer_contents_scale,
last_screen_transform,
current_screen_transform,
current_frame_time_in_seconds,
max_tiles_for_interest_area);
ASSERT_TRUE(tiling->TileAt(0, 0));
ASSERT_TRUE(tiling->TileAt(0, 1));
ASSERT_TRUE(tiling->TileAt(1, 0));
ASSERT_TRUE(tiling->TileAt(1, 1));
TilePriority priority = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
// Furthermore, in this scenario tiles on the right hand side should have a
// larger distance to visible.
TilePriority left = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
TilePriority right = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_GT(right.distance_to_visible_in_pixels,
left.distance_to_visible_in_pixels);
left = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
right = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(right.distance_to_visible_in_pixels,
left.distance_to_visible_in_pixels);
}
TEST(UpdateTilePrioritiesTest, PartiallyOffscreenLayer) {
// Sanity check that a layer with some tiles visible and others offscreen has
// correct TilePriorities for each tile.
FakePictureLayerTilingClient client;
scoped_ptr<TestablePictureLayerTiling> tiling;
gfx::Size device_viewport(800, 600);
gfx::Rect visible_layer_rect(0, 0, 100, 100); // only top quarter.
gfx::Size last_layer_bounds(200, 200);
gfx::Size current_layer_bounds(200, 200);
float last_layer_contents_scale = 1.f;
float current_layer_contents_scale = 1.f;
gfx::Transform last_screen_transform;
gfx::Transform current_screen_transform;
double current_frame_time_in_seconds = 1.0;
size_t max_tiles_for_interest_area = 10000;
current_screen_transform.Translate(705, 505);
last_screen_transform = current_screen_transform;
gfx::Rect viewport_in_layer_space = ViewportInLayerSpace(
current_screen_transform, device_viewport);
client.SetTileSize(gfx::Size(100, 100));
tiling = TestablePictureLayerTiling::Create(1.0f, // contents_scale
current_layer_bounds,
&client);
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
current_layer_bounds,
last_layer_contents_scale,
current_layer_contents_scale,
last_screen_transform,
current_screen_transform,
current_frame_time_in_seconds,
max_tiles_for_interest_area);
ASSERT_TRUE(tiling->TileAt(0, 0));
ASSERT_TRUE(tiling->TileAt(0, 1));
ASSERT_TRUE(tiling->TileAt(1, 0));
ASSERT_TRUE(tiling->TileAt(1, 1));
TilePriority priority = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
priority = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
}
TEST(UpdateTilePrioritiesTest, PartiallyOffscreenRotatedLayer) {
// Each tile of a layer may be affected differently by a transform; Check
// that UpdateTilePriorities correctly accounts for the transform between
// layer space and screen space.
FakePictureLayerTilingClient client;
scoped_ptr<TestablePictureLayerTiling> tiling;
gfx::Size device_viewport(800, 600);
gfx::Rect visible_layer_rect(0, 0, 100, 100); // only top-left quarter.
gfx::Size last_layer_bounds(200, 200);
gfx::Size current_layer_bounds(200, 200);
float last_layer_contents_scale = 1.f;
float current_layer_contents_scale = 1.f;
gfx::Transform last_screen_transform;
gfx::Transform current_screen_transform;
double current_frame_time_in_seconds = 1.0;
size_t max_tiles_for_interest_area = 10000;
// A diagonally rotated layer that is partially off the bottom of the screen.
// In this configuration, only the top-left tile would be visible.
current_screen_transform.Translate(400, 550);
current_screen_transform.RotateAboutZAxis(45);
last_screen_transform = current_screen_transform;
gfx::Rect viewport_in_layer_space = ViewportInLayerSpace(
current_screen_transform, device_viewport);
client.SetTileSize(gfx::Size(100, 100));
tiling = TestablePictureLayerTiling::Create(1.0f, // contents_scale
current_layer_bounds,
&client);
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
current_layer_bounds,
last_layer_contents_scale,
current_layer_contents_scale,
last_screen_transform,
current_screen_transform,
current_frame_time_in_seconds,
max_tiles_for_interest_area);
ASSERT_TRUE(tiling->TileAt(0, 0));
ASSERT_TRUE(tiling->TileAt(0, 1));
ASSERT_TRUE(tiling->TileAt(1, 0));
ASSERT_TRUE(tiling->TileAt(1, 1));
TilePriority priority = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
priority = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
// Furthermore, in this scenario the bottom-right tile should have the larger
// distance to visible.
TilePriority top_left = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
TilePriority top_right = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
TilePriority bottom_left = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
TilePriority bottom_right = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(top_right.distance_to_visible_in_pixels,
top_left.distance_to_visible_in_pixels);
EXPECT_GT(bottom_left.distance_to_visible_in_pixels,
top_left.distance_to_visible_in_pixels);
EXPECT_GT(bottom_right.distance_to_visible_in_pixels,
bottom_left.distance_to_visible_in_pixels);
EXPECT_GT(bottom_right.distance_to_visible_in_pixels,
top_right.distance_to_visible_in_pixels);
}
TEST(UpdateTilePrioritiesTest, PerspectiveLayer) {
// Perspective transforms need to take a different code path.
// This test checks tile priorities of a perspective layer.
FakePictureLayerTilingClient client;
scoped_ptr<TestablePictureLayerTiling> tiling;
gfx::Size device_viewport(800, 600);
gfx::Rect visible_layer_rect(0, 0, 0, 0); // offscreen.
gfx::Size last_layer_bounds(200, 200);
gfx::Size current_layer_bounds(200, 200);
float last_layer_contents_scale = 1.f;
float current_layer_contents_scale = 1.f;
gfx::Transform last_screen_transform;
gfx::Transform current_screen_transform;
double current_frame_time_in_seconds = 1.0;
size_t max_tiles_for_interest_area = 10000;
// A 3d perspective layer rotated about its Y axis, translated to almost
// fully offscreen. The left side will appear closer (i.e. larger in 2d) than
// the right side, so the top-left tile will technically be closer than the
// top-right.
// Translate layer to offscreen
current_screen_transform.Translate(400.0, 630.0);
// Apply perspective about the center of the layer
current_screen_transform.Translate(100.0, 100.0);
current_screen_transform.ApplyPerspectiveDepth(100.0);
current_screen_transform.RotateAboutYAxis(10.0);
current_screen_transform.Translate(-100.0, -100.0);
last_screen_transform = current_screen_transform;
// Sanity check that this transform wouldn't cause w<0 clipping.
bool clipped;
MathUtil::MapQuad(current_screen_transform,
gfx::QuadF(gfx::RectF(0, 0, 200, 200)),
&clipped);
ASSERT_FALSE(clipped);
gfx::Rect viewport_in_layer_space = ViewportInLayerSpace(
current_screen_transform, device_viewport);
client.SetTileSize(gfx::Size(100, 100));
tiling = TestablePictureLayerTiling::Create(1.0f, // contents_scale
current_layer_bounds,
&client);
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
current_layer_bounds,
last_layer_contents_scale,
current_layer_contents_scale,
last_screen_transform,
current_screen_transform,
current_frame_time_in_seconds,
max_tiles_for_interest_area);
ASSERT_TRUE(tiling->TileAt(0, 0));
ASSERT_TRUE(tiling->TileAt(0, 1));
ASSERT_TRUE(tiling->TileAt(1, 0));
ASSERT_TRUE(tiling->TileAt(1, 1));
// All tiles will have a positive distance_to_visible
// and an infinite time_to_visible.
TilePriority priority = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
// Furthermore, in this scenario the top-left distance_to_visible
// will be smallest, followed by top-right. The bottom layers
// will of course be further than the top layers.
TilePriority top_left = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
TilePriority top_right = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
TilePriority bottom_left = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
TilePriority bottom_right = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(top_right.distance_to_visible_in_pixels,
top_left.distance_to_visible_in_pixels);
EXPECT_GT(bottom_right.distance_to_visible_in_pixels,
top_right.distance_to_visible_in_pixels);
EXPECT_GT(bottom_left.distance_to_visible_in_pixels,
top_left.distance_to_visible_in_pixels);
}
TEST(UpdateTilePrioritiesTest, PerspectiveLayerClippedByW) {
// Perspective transforms need to take a different code path.
// This test checks tile priorities of a perspective layer.
FakePictureLayerTilingClient client;
scoped_ptr<TestablePictureLayerTiling> tiling;
gfx::Size device_viewport(800, 600);
gfx::Rect visible_layer_rect(0, 0, 0, 0); // offscreen.
gfx::Size last_layer_bounds(200, 200);
gfx::Size current_layer_bounds(200, 200);
float last_layer_contents_scale = 1.f;
float current_layer_contents_scale = 1.f;
gfx::Transform last_screen_transform;
gfx::Transform current_screen_transform;
double current_frame_time_in_seconds = 1.0;
size_t max_tiles_for_interest_area = 10000;
// A 3d perspective layer rotated about its Y axis, translated to almost
// fully offscreen. The left side will appear closer (i.e. larger in 2d) than
// the right side, so the top-left tile will technically be closer than the
// top-right.
// Translate layer to offscreen
current_screen_transform.Translate(400.0, 970.0);
// Apply perspective and rotation about the center of the layer
current_screen_transform.Translate(100.0, 100.0);
current_screen_transform.ApplyPerspectiveDepth(10.0);
current_screen_transform.RotateAboutYAxis(10.0);
current_screen_transform.Translate(-100.0, -100.0);
last_screen_transform = current_screen_transform;
// Sanity check that this transform does cause w<0 clipping for the left side
// of the layer, but not the right side.
bool clipped;
MathUtil::MapQuad(current_screen_transform,
gfx::QuadF(gfx::RectF(0, 0, 100, 200)),
&clipped);
ASSERT_TRUE(clipped);
MathUtil::MapQuad(current_screen_transform,
gfx::QuadF(gfx::RectF(100, 0, 100, 200)),
&clipped);
ASSERT_FALSE(clipped);
gfx::Rect viewport_in_layer_space = ViewportInLayerSpace(
current_screen_transform, device_viewport);
client.SetTileSize(gfx::Size(100, 100));
tiling = TestablePictureLayerTiling::Create(1.0f, // contents_scale
current_layer_bounds,
&client);
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
current_layer_bounds,
last_layer_contents_scale,
current_layer_contents_scale,
last_screen_transform,
current_screen_transform,
current_frame_time_in_seconds,
max_tiles_for_interest_area);
ASSERT_TRUE(tiling->TileAt(0, 0));
ASSERT_TRUE(tiling->TileAt(0, 1));
ASSERT_TRUE(tiling->TileAt(1, 0));
ASSERT_TRUE(tiling->TileAt(1, 1));
// Left-side tiles will be clipped by the transform, so we have to assume
// they are visible just in case.
TilePriority priority = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
priority = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
// Right-side tiles will have a positive distance_to_visible
// and an infinite time_to_visible.
priority = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
}
TEST(UpdateTilePrioritiesTest, BasicMotion) {
// Test that time_to_visible is computed correctly when
// there is some motion.
FakePictureLayerTilingClient client;
scoped_ptr<TestablePictureLayerTiling> tiling;
gfx::Size device_viewport(800, 600);
gfx::Rect visible_layer_rect(0, 0, 0, 0);
gfx::Size last_layer_bounds(200, 200);
gfx::Size current_layer_bounds(200, 200);
float last_layer_contents_scale = 1.f;
float current_layer_contents_scale = 1.f;
gfx::Transform last_screen_transform;
gfx::Transform current_screen_transform;
double last_frame_time_in_seconds = 1.0;
double current_frame_time_in_seconds = 2.0;
size_t max_tiles_for_interest_area = 10000;
// Offscreen layer is coming closer to viewport at 1000 pixels per second.
current_screen_transform.Translate(1800, 0);
last_screen_transform.Translate(2800, 0);
gfx::Rect viewport_in_layer_space = ViewportInLayerSpace(
current_screen_transform, device_viewport);
client.SetTileSize(gfx::Size(100, 100));
tiling = TestablePictureLayerTiling::Create(1.0f, // contents_scale
current_layer_bounds,
&client);
// previous ("last") frame
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
last_layer_bounds,
last_layer_contents_scale,
last_layer_contents_scale,
last_screen_transform,
last_screen_transform,
last_frame_time_in_seconds,
max_tiles_for_interest_area);
// current frame
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
current_layer_bounds,
last_layer_contents_scale,
current_layer_contents_scale,
last_screen_transform,
current_screen_transform,
current_frame_time_in_seconds,
max_tiles_for_interest_area);
ASSERT_TRUE(tiling->TileAt(0, 0));
ASSERT_TRUE(tiling->TileAt(0, 1));
ASSERT_TRUE(tiling->TileAt(1, 0));
ASSERT_TRUE(tiling->TileAt(1, 1));
TilePriority priority = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(1.f,
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(1.f,
priority.time_to_visible_in_seconds);
// time_to_visible for the right hand side layers needs an extra 0.099
// seconds because this tile is 99 pixels further away.
priority = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(1.099f,
priority.time_to_visible_in_seconds);
priority = tiling->TileAt(1, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(1.099f,
priority.time_to_visible_in_seconds);
}
TEST(UpdateTilePrioritiesTest, RotationMotion) {
// Each tile of a layer may be affected differently by a transform; Check
// that UpdateTilePriorities correctly accounts for the transform between
// layer space and screen space.
FakePictureLayerTilingClient client;
scoped_ptr<TestablePictureLayerTiling> tiling;
gfx::Size device_viewport(800, 600);
gfx::Rect visible_layer_rect(0, 0, 0, 0); // offscren.
gfx::Size last_layer_bounds(200, 200);
gfx::Size current_layer_bounds(200, 200);
float last_layer_contents_scale = 1.f;
float current_layer_contents_scale = 1.f;
gfx::Transform last_screen_transform;
gfx::Transform current_screen_transform;
double last_frame_time_in_seconds = 1.0;
double current_frame_time_in_seconds = 2.0;
size_t max_tiles_for_interest_area = 10000;
// Rotation motion is set up specifically so that:
// - rotation occurs about the center of the layer
// - the top-left tile becomes visible on rotation
// - the top-right tile will have an infinite time_to_visible
// because it is rotating away from viewport.
// - bottom-left layer will have a positive non-zero time_to_visible
// because it is rotating toward the viewport.
current_screen_transform.Translate(400, 550);
current_screen_transform.RotateAboutZAxis(45);
last_screen_transform.Translate(400, 550);
gfx::Rect viewport_in_layer_space = ViewportInLayerSpace(
current_screen_transform, device_viewport);
client.SetTileSize(gfx::Size(100, 100));
tiling = TestablePictureLayerTiling::Create(1.0f, // contents_scale
current_layer_bounds,
&client);
// previous ("last") frame
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
last_layer_bounds,
last_layer_contents_scale,
last_layer_contents_scale,
last_screen_transform,
last_screen_transform,
last_frame_time_in_seconds,
max_tiles_for_interest_area);
// current frame
tiling->UpdateTilePriorities(
ACTIVE_TREE,
device_viewport,
viewport_in_layer_space,
visible_layer_rect,
last_layer_bounds,
current_layer_bounds,
last_layer_contents_scale,
current_layer_contents_scale,
last_screen_transform,
current_screen_transform,
current_frame_time_in_seconds,
max_tiles_for_interest_area);
ASSERT_TRUE(tiling->TileAt(0, 0));
ASSERT_TRUE(tiling->TileAt(0, 1));
ASSERT_TRUE(tiling->TileAt(1, 0));
ASSERT_TRUE(tiling->TileAt(1, 1));
TilePriority priority = tiling->TileAt(0, 0)->priority(ACTIVE_TREE);
EXPECT_FLOAT_EQ(0.f, priority.distance_to_visible_in_pixels);
EXPECT_FLOAT_EQ(0.f, priority.time_to_visible_in_seconds);
priority = tiling->TileAt(0, 1)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_GT(priority.time_to_visible_in_seconds, 0.f);
priority = tiling->TileAt(1, 0)->priority(ACTIVE_TREE);
EXPECT_GT(priority.distance_to_visible_in_pixels, 0.f);
EXPECT_FLOAT_EQ(std::numeric_limits<float>::infinity(),
priority.time_to_visible_in_seconds);
}
} // namespace
} // namespace cc