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ThemeEditor: Implement a way to simulate color blindness in preview

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Implement a mechanism that allows us to alter colors so that they
mimic those a colorblind person would see. From the color we can then
alter the colors for the whole preview so we can simulate everything
in the theme including icons/decorations.

This filter is also available as a Filter in LibGfx so it can be
reused in multiple other places.

The color simulation algorithm is based on this one
https://github.com/MaPePeR/jsColorblindSimulator publicly available.
This commit is contained in:
TheGrizzlyDev 2021-12-17 22:59:01 +00:00 • committed by Linus Groh
parent 1c05d39abc
commit ebaf211260
7 changed files with 289 additions and 0 deletions
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7
Userland/Applications/ThemeEditor/PreviewWidget.h
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@ -1,6 +1,7 @@
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2021, Antonio Di Stefano <tonio9681@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -9,6 +10,7 @@
#include <LibGUI/Frame.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Filters/ColorBlindnessFilter.h>
#include <LibGfx/Palette.h>
namespace ThemeEditor {
@ -25,6 +27,8 @@ public:
void set_preview_palette(const Gfx::Palette&);
void set_theme_from_file(String const& path, int fd);
void set_color_filter(OwnPtr<Gfx::ColorBlindnessFilter>);
Function<void(String const&)> on_theme_load_from_file;
private:
@ -33,11 +37,14 @@ private:
void load_theme_bitmaps();
virtual void paint_event(GUI::PaintEvent&) override;
virtual void second_paint_event(GUI::PaintEvent&) override;
virtual void resize_event(GUI::ResizeEvent&) override;
virtual void drop_event(GUI::DropEvent&) override;
Gfx::Palette m_preview_palette;
OwnPtr<Gfx::ColorBlindnessFilter> m_color_filter = nullptr;
RefPtr<Gfx::Bitmap> m_active_window_icon;
RefPtr<Gfx::Bitmap> m_inactive_window_icon;