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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.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DARK_MODE_SETTINGS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DARK_MODE_SETTINGS_H_
namespace blink {
enum class DarkModeInversionAlgorithm {
// For testing only, does a simple 8-bit invert of every RGB pixel component.
kSimpleInvertForTesting,
kInvertBrightness,
kInvertLightness,
kInvertLightnessLAB,
kFirst = kSimpleInvertForTesting, // First enum value.
kLast = kInvertLightnessLAB, // Last enum value.
};
enum class DarkModeImagePolicy {
kFilterAll, // Apply dark-mode filter to all images.
kFilterNone, // Never apply dark-mode filter to any images.
kFilterSmart, // Apply dark-mode based on image content.
kFirst = kFilterAll, // First enum value.
kLast = kFilterSmart, // Last enum value.
};
enum class DarkModeImageClassifierPolicy {
// Use a decision tree based on the number of colors in the image,
// falling back to a machine learning model.
kNumColorsWithMlFallback,
// Uses a decision tree to invert the image if it has some transparency
// and a limited selection of colors (likely an icon).
kTransparencyAndNumColors,
kFirst = kNumColorsWithMlFallback,
kLast = kTransparencyAndNumColors,
};
// New variables added to this struct should be considered in
// third_party/blink/renderer/platform/graphics/dark_mode_settings_builder.h
struct DarkModeSettings {
DarkModeInversionAlgorithm mode =
DarkModeInversionAlgorithm::kInvertLightnessLAB;
float contrast = 0.0; // Valid range from -1.0 to 1.0
DarkModeImagePolicy image_policy = DarkModeImagePolicy::kFilterNone;
DarkModeImageClassifierPolicy image_classifier_policy =
DarkModeImageClassifierPolicy::kNumColorsWithMlFallback;
// Foreground colors with brightness below this threshold will be inverted,
// and above it will be left as in the original, non-dark-mode page. Set to
// 255 to always invert foreground color or to 0 to never invert text color.
int foreground_brightness_threshold = 255;
// Background elements with brightness above this threshold will be inverted,
// and below it will be left as in the original, non-dark-mode page. Set to
// 256 to never invert the color or to 0 to always invert it.
//
// Warning: This behavior is the opposite of foreground_brightness_threshold!
int background_brightness_threshold = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DARK_MODE_SETTINGS_H_
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