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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_TEST_SK_GMOCK_SUPPORT_H_
#define UI_GFX_TEST_SK_GMOCK_SUPPORT_H_
#include "testing/gmock/include/gmock/gmock.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/color_utils.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/test/sk_color_eq.h"
namespace gfx::test {
MATCHER_P2(IsCloseToBitmap, expected_bmp, max_per_channel_deviation, "") {
// Number of pixels with an error
int error_pixels_count = 0;
gfx::Rect error_bounding_rect = gfx::Rect();
// Check that bitmaps have identical dimensions.
if (arg.width() != expected_bmp.width()) {
*result_listener << "where widths do not match, actual: " << arg.width()
<< ", expected: " << expected_bmp.width();
return false;
}
if (arg.height() != expected_bmp.height()) {
*result_listener << "where heights do not match, actual: " << arg.height()
<< ", expected: " << expected_bmp.height();
return false;
}
for (int x = 0; x < arg.width(); ++x) {
for (int y = 0; y < arg.height(); ++y) {
SkColor actual_color = arg.getColor(x, y);
SkColor expected_color = expected_bmp.getColor(x, y);
if (!ColorsClose(actual_color, expected_color,
max_per_channel_deviation)) {
++error_pixels_count;
error_bounding_rect.Union(gfx::Rect(x, y, 1, 1));
}
}
}
if (error_pixels_count != 0) {
*result_listener
<< "Number of pixel with an error, given max_per_channel_deviation of "
<< max_per_channel_deviation << ": " << error_pixels_count
<< "\nError Bounding Box : " << error_bounding_rect.ToString() << "\n";
int sample_x = error_bounding_rect.x();
int sample_y = error_bounding_rect.y();
std::string expected_color = color_utils::SkColorToRgbaString(
expected_bmp.getColor(sample_x, sample_y));
std::string actual_color =
color_utils::SkColorToRgbaString(arg.getColor(sample_x, sample_y));
*result_listener << "Sample pixel comparison at " << sample_x << "x"
<< sample_y << ": Expected " << expected_color
<< ", actual " << actual_color;
return false;
}
return true;
}
MATCHER_P(EqualsBitmap, expected_bmp, "") {
return testing::ExplainMatchResult(
IsCloseToBitmap(expected_bmp,
/*max_per_channel_deviation=*/0),
arg, result_listener);
}
} // namespace gfx::test
#endif // UI_GFX_TEST_SK_GMOCK_SUPPORT_H_
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