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// Copyright 2012 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/display/display.h"
#include "base/command_line.h"
#include "base/test/scoped_command_line.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/display/display_switches.h"
#include "ui/display/types/display_color_management.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
namespace display {
TEST(DisplayTest, WorkArea) {
Display display(0, gfx::Rect(0, 0, 100, 100));
EXPECT_EQ(gfx::Rect(0, 0, 100, 100), display.bounds());
EXPECT_EQ(gfx::Rect(0, 0, 100, 100), display.work_area());
display.set_work_area(gfx::Rect(3, 4, 90, 80));
EXPECT_EQ(gfx::Rect(0, 0, 100, 100), display.bounds());
EXPECT_EQ(gfx::Rect(3, 4, 90, 80), display.work_area());
display.SetScaleAndBounds(1.0f, gfx::Rect(10, 20, 50, 50));
EXPECT_EQ(gfx::Rect(10, 20, 50, 50), display.bounds());
EXPECT_EQ(gfx::Rect(13, 24, 40, 30), display.work_area());
display.SetSize(gfx::Size(200, 200));
EXPECT_EQ(gfx::Rect(13, 24, 190, 180), display.work_area());
display.UpdateWorkAreaFromInsets(gfx::Insets::TLBR(3, 4, 5, 6));
EXPECT_EQ(gfx::Rect(14, 23, 190, 192), display.work_area());
}
TEST(DisplayTest, Scale) {
Display display(0, gfx::Rect(0, 0, 100, 100));
display.set_work_area(gfx::Rect(10, 10, 80, 80));
EXPECT_EQ(gfx::Rect(0, 0, 100, 100), display.bounds());
EXPECT_EQ(gfx::Rect(10, 10, 80, 80), display.work_area());
// Scale it back to 2x
display.SetScaleAndBounds(2.0f, gfx::Rect(0, 0, 140, 140));
EXPECT_EQ(gfx::Rect(0, 0, 70, 70), display.bounds());
EXPECT_EQ(gfx::Rect(10, 10, 50, 50), display.work_area());
// Scale it back to 1x
display.SetScaleAndBounds(1.0f, gfx::Rect(0, 0, 100, 100));
EXPECT_EQ(gfx::Rect(0, 0, 100, 100), display.bounds());
EXPECT_EQ(gfx::Rect(10, 10, 80, 80), display.work_area());
}
// https://crbug.com/517944
TEST(DisplayTest, ForcedDeviceScaleFactorByCommandLine) {
base::test::ScopedCommandLine scoped_command_line;
base::CommandLine* command_line = scoped_command_line.GetProcessCommandLine();
Display::ResetForceDeviceScaleFactorForTesting();
command_line->AppendSwitch(switches::kForceDeviceScaleFactor);
EXPECT_EQ(1, Display::GetForcedDeviceScaleFactor());
Display::ResetForceDeviceScaleFactorForTesting();
}
TEST(DisplayTest, ForcedDeviceScaleFactor) {
Display::SetForceDeviceScaleFactor(2);
EXPECT_EQ(2, Display::GetForcedDeviceScaleFactor());
Display::ResetForceDeviceScaleFactorForTesting();
}
TEST(DisplayTest, DisplayFrequency) {
Display display(0, gfx::Rect(0, 0, 100, 100));
display.set_display_frequency(60.0f);
EXPECT_EQ(60.0f, display.display_frequency());
display.set_display_frequency(120.0f);
EXPECT_EQ(120.0f, display.display_frequency());
}
TEST(DisplayTest, DisplayLabel) {
Display display(0, gfx::Rect(0, 0, 100, 100));
display.set_label("Display 1");
EXPECT_EQ("Display 1", display.label());
display.set_label("Display 2");
EXPECT_EQ("Display 2", display.label());
}
TEST(DisplayTest, GammaCurve) {
std::vector<GammaRampRGBEntry> lut({
{0, 1, 1},
{32768, 2, 5},
{65535, 3, 9},
});
GammaCurve curve(std::move(lut));
uint16_t r, g, b;
// Evaluate at the control points.
curve.Evaluate(0 / 2.f, r, g, b);
EXPECT_EQ(0, r);
EXPECT_EQ(1, g);
EXPECT_EQ(1, b);
curve.Evaluate(1 / 2.f, r, g, b);
EXPECT_EQ(32768, r);
EXPECT_EQ(2, g);
EXPECT_EQ(5, b);
curve.Evaluate(2 / 2.f, r, g, b);
EXPECT_EQ(65535, r);
EXPECT_EQ(3, g);
EXPECT_EQ(9, b);
// Evaluate between points.
curve.Evaluate(0.25f / 2.f, r, g, b);
EXPECT_EQ(2, b);
curve.Evaluate(0.50f / 2.f, r, g, b);
EXPECT_EQ(3, b);
curve.Evaluate(0.75f / 2.f, r, g, b);
EXPECT_EQ(4, b);
curve.Evaluate(1.00f / 2.f, r, g, b);
EXPECT_EQ(5, b);
curve.Evaluate(1.25f / 2.f, r, g, b);
EXPECT_EQ(6, b);
curve.Evaluate(1.50f / 2.f, r, g, b);
EXPECT_EQ(7, b);
curve.Evaluate(1.75f / 2.f, r, g, b);
EXPECT_EQ(8, b);
}
TEST(DisplayTest, GammaCurveMakeConcat) {
std::vector<GammaRampRGBEntry> lut_f;
std::vector<GammaRampRGBEntry> lut_g;
lut_f.resize(1024);
for (size_t i = 0; i < lut_f.size(); ++i) {
float x = i / (lut_f.size() - 1.f);
float r = x * x;
float g = x * x * x;
float b = x * x * x * x;
lut_f[i].r = static_cast<uint16_t>(std::round(65535.f * r));
lut_f[i].g = static_cast<uint16_t>(std::round(65535.f * g));
lut_f[i].b = static_cast<uint16_t>(std::round(65535.f * b));
}
lut_g.resize(512);
for (size_t i = 0; i < lut_g.size(); ++i) {
float x = i / (lut_g.size() - 1.f);
float r = 0.5f * x;
float g = 0.5f + 0.5f * x;
float b = x;
lut_g[i].r = static_cast<uint16_t>(std::round(65535.f * r));
lut_g[i].g = static_cast<uint16_t>(std::round(65535.f * g));
lut_g[i].b = static_cast<uint16_t>(std::round(65535.f * b));
}
GammaCurve curve_f(std::move(lut_f));
GammaCurve curve_g(std::move(lut_g));
GammaCurve curve = GammaCurve::MakeConcat(curve_f, curve_g);
for (size_t i = 0; i < 256; ++i) {
float x = i / 255.f;
// Apply g.
float r = 0.5f * x;
float g = 0.5f + 0.5f * x;
float b = x;
// Apply f.
r = r * r;
g = g * g * g;
b = b * b * b * b;
// Compare.
uint16_t actual_r;
uint16_t actual_g;
uint16_t actual_b;
curve.Evaluate(x, actual_r, actual_g, actual_b);
EXPECT_LT(std::abs(r - actual_r / 65535.f), 0.01);
EXPECT_LT(std::abs(g - actual_g / 65535.f), 0.01);
EXPECT_LT(std::abs(b - actual_b / 65535.f), 0.01);
}
}
} // namespace display
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