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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_COMMON_THEMES_AUTOGENERATED_THEME_UTIL_H_
#define CHROME_COMMON_THEMES_AUTOGENERATED_THEME_UTIL_H_
#include "third_party/skia/include/core/SkColor.h"
// Constants for autogenerated themes.
// Minimum contrast for active tab and frame color to avoid isolation line in
// the tab strip.
inline constexpr float kAutogeneratedThemeActiveTabMinContrast = 1.3f;
inline constexpr float kAutogeneratedThemeActiveTabPreferredContrast = 1.6f;
inline constexpr float kAutogeneratedThemeActiveTabPreferredContrastForDark =
1.7f;
// Contrast between foreground and background.
inline constexpr float kAutogeneratedThemeTextPreferredContrast = 7.0f;
struct AutogeneratedThemeColors {
SkColor frame_color;
SkColor frame_text_color;
SkColor active_tab_color;
SkColor active_tab_text_color;
SkColor ntp_color;
};
// Generates theme colors for the given `color`.
AutogeneratedThemeColors GetAutogeneratedThemeColors(SkColor color);
// Calculates a contrasting color for a given `color` by changing the color's
// luminance. Returns a lighter color if the color is very dark or a darker
// color otherwise.
SkColor GetContrastingColor(SkColor color, float luminosity_change);
#endif // CHROME_COMMON_THEMES_AUTOGENERATED_THEME_UTIL_H_
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