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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/cursor/mojom/cursor_mojom_traits.h"
#include <limits>
#include <utility>
#include "base/numerics/safe_conversions.h"
#include "skia/public/mojom/bitmap_skbitmap_mojom_traits.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/base/cursor/cursor.h"
#include "ui/base/cursor/mojom/cursor.mojom.h"
#include "ui/base/cursor/mojom/cursor_type.mojom-shared.h"
#include "ui/gfx/geometry/mojom/geometry_mojom_traits.h"
#include "ui/gfx/image/image_unittest_util.h"
#include "ui/gfx/skia_util.h"
namespace ui {
namespace {
using mojom::CursorType;
bool EchoCursor(const Cursor& in, Cursor* out) {
return mojom::Cursor::DeserializeFromMessage(
mojom::Cursor::SerializeAsMessage(&in), out);
}
using CursorStructTraitsTest = testing::Test;
} // namespace
// Test that basic cursor structs are passed correctly across the wire.
TEST_F(CursorStructTraitsTest, TestBuiltIn) {
for (int i = base::checked_cast<int>(CursorType::kMinValue);
i < base::checked_cast<int>(CursorType::kMaxValue); ++i) {
CursorType type = static_cast<CursorType>(i);
if (type == CursorType::kCustom) {
continue;
}
const Cursor input(type);
Cursor output;
ASSERT_TRUE(EchoCursor(input, &output));
EXPECT_EQ(type, output.type());
}
}
// Test that cursor bitmaps and metadata are passed correctly across the wire.
TEST_F(CursorStructTraitsTest, TestBitmapCursor) {
SkBitmap bitmap;
bitmap.allocN32Pixels(10, 10);
bitmap.eraseColor(SK_ColorRED);
const gfx::Point kHotspot = gfx::Point(5, 2);
const float kScale = 2.0f;
const Cursor input = Cursor::NewCustom(std::move(bitmap), kHotspot, kScale);
Cursor output;
ASSERT_TRUE(EchoCursor(input, &output));
EXPECT_EQ(input, output);
EXPECT_EQ(CursorType::kCustom, output.type());
EXPECT_EQ(kHotspot, output.custom_hotspot());
EXPECT_EQ(kScale, output.image_scale_factor());
// Even though the pixel data is the same, the bitmap generation ids differ.
EXPECT_TRUE(
gfx::BitmapsAreEqual(input.custom_bitmap(), output.custom_bitmap()));
EXPECT_NE(input.custom_bitmap().getGenerationID(),
output.custom_bitmap().getGenerationID());
// Make a copy of output; the bitmap generation ids should be the same.
const Cursor copy = output;
EXPECT_EQ(output.custom_bitmap().getGenerationID(),
copy.custom_bitmap().getGenerationID());
EXPECT_EQ(copy, output);
}
// Test that empty bitmaps are passed correctly over the wire. This happens when
// renderers relay a custom cursor before the bitmap resource is loaded.
TEST_F(CursorStructTraitsTest, TestEmptyCursor) {
gfx::Point hotspot = gfx::Point(5, 2);
const float kScale = 2.0f;
const Cursor input =
Cursor::NewCustom(SkBitmap(), std::move(hotspot), kScale);
Cursor output;
ASSERT_TRUE(EchoCursor(input, &output));
EXPECT_TRUE(output.custom_bitmap().empty());
}
// Test that various device scale factors are passed correctly over the wire.
TEST_F(CursorStructTraitsTest, TestDeviceScaleFactors) {
Cursor output;
for (auto scale : {0.525f, 0.75f, 0.9f, 1.0f, 2.1f, 2.5f, 3.0f, 10.0f}) {
SCOPED_TRACE(testing::Message() << " scale: " << scale);
const Cursor input = Cursor::NewCustom(SkBitmap(), gfx::Point(), scale);
ASSERT_TRUE(EchoCursor(input, &output));
EXPECT_EQ(scale, output.image_scale_factor());
}
}
TEST_F(CursorStructTraitsTest, TestCustomCursorConstraints) {
const SkBitmap kBitmap = gfx::test::CreateBitmap(32, 32);
const gfx::Point kHotspot = gfx::Point(10, 20);
Cursor input, output;
input = ui::Cursor::NewCustom(SkBitmap(), gfx::Point());
ASSERT_TRUE(EchoCursor(input, &output));
EXPECT_EQ(input, output);
input = ui::Cursor::NewCustom(kBitmap, kHotspot, 1.5f);
ASSERT_TRUE(EchoCursor(input, &output));
EXPECT_EQ(input, output);
// Value taken from ui/base/cursor/cursor.cc.
static constexpr int kMaximumCursorDIPSize = 128;
// Expect a failure when the 1x scaled image width is too large.
input = ui::Cursor::NewCustom(
gfx::test::CreateBitmap(kMaximumCursorDIPSize + 1, 3), kHotspot, 1.0f);
EXPECT_FALSE(EchoCursor(input, &output));
// Expect a failure when the 1x scaled image height is too large.
input = ui::Cursor::NewCustom(
gfx::test::CreateBitmap(3, kMaximumCursorDIPSize + 1), kHotspot, 1.0f);
EXPECT_FALSE(EchoCursor(input, &output));
// Expect a failure when the scaled image width is too large.
input = ui::Cursor::NewCustom(
gfx::test::CreateBitmap(kMaximumCursorDIPSize / 2, 5), kHotspot, 0.02f);
EXPECT_FALSE(EchoCursor(input, &output));
// Expect a failure when the scaled image height is too large.
input = ui::Cursor::NewCustom(
gfx::test::CreateBitmap(5, kMaximumCursorDIPSize / 4), kHotspot, 0.1f);
EXPECT_FALSE(EchoCursor(input, &output));
// Expect a failure if calculating the image size overflows.
input = ui::Cursor::NewCustom(gfx::test::CreateBitmap(10, 10), kHotspot,
std::numeric_limits<float>::epsilon());
EXPECT_FALSE(EchoCursor(input, &output));
}
} // namespace ui
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