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// Copyright 2021 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/gfx/test/sk_color_eq.h"
#include <iomanip>
#include <string>
namespace gfx {
namespace {
std::string ColorAsString(SkColor color) {
std::ostringstream stream;
stream << std::hex << std::uppercase << "#" << std::setfill('0')
<< std::setw(2) << SkColorGetA(color) << std::setw(2)
<< SkColorGetR(color) << std::setw(2) << SkColorGetG(color)
<< std::setw(2) << SkColorGetB(color);
return stream.str();
}
bool ColorComponentsClose(SkColor component1,
SkColor component2,
int max_deviation) {
int c1 = static_cast<int>(component1);
int c2 = static_cast<int>(component2);
return std::abs(c1 - c2) <= max_deviation;
}
} // namespace
::testing::AssertionResult AssertSkColorsEqual(const char* lhs_expr,
const char* rhs_expr,
SkColor lhs,
SkColor rhs) {
if (lhs == rhs) {
return ::testing::AssertionSuccess();
}
return ::testing::AssertionFailure()
<< "Expected equality of these values:\n"
<< lhs_expr << "\n Which is: " << ColorAsString(lhs) << "\n"
<< rhs_expr << "\n Which is: " << ColorAsString(rhs);
}
bool ColorsClose(SkColor color1,
SkColor color2,
int max_per_channel_deviation) {
return ColorComponentsClose(SkColorGetR(color1), SkColorGetR(color2),
max_per_channel_deviation) &&
ColorComponentsClose(SkColorGetG(color1), SkColorGetG(color2),
max_per_channel_deviation) &&
ColorComponentsClose(SkColorGetB(color1), SkColorGetB(color2),
max_per_channel_deviation) &&
ColorComponentsClose(SkColorGetA(color1), SkColorGetA(color2),
max_per_channel_deviation);
}
::testing::AssertionResult AssertSkColorsClose(
const char* lhs_expr,
const char* rhs_expr,
const char* max_per_channel_deviation_expr,
SkColor lhs,
SkColor rhs,
int max_per_channel_deviation) {
if (ColorsClose(lhs, rhs, max_per_channel_deviation)) {
return ::testing::AssertionSuccess();
}
return ::testing::AssertionFailure()
<< "Expected closeness of these values:\n"
<< lhs_expr << "\n Which is: " << ColorAsString(lhs) << "\n"
<< rhs_expr << "\n Which is: " << ColorAsString(rhs) << "\n"
<< max_per_channel_deviation_expr << " (max per-channel deviation)"
<< "\n Which is: " << max_per_channel_deviation;
}
} // namespace gfx
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