mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-25 17:25:08 +02:00
659 lines
19 KiB
C++
659 lines
19 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <math.h>
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#include <AK/Assertions.h>
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#include <AK/Format.h>
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#include <AK/Forward.h>
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#include <AK/Math.h>
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#include <AK/StdLibExtras.h>
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#include <LibGfx/ColorConversion.h>
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#include <LibIPC/Forward.h>
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namespace Gfx {
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// Named after in memory-order (little-endian)
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// e.g. 0xAARRGGBB
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using BGRA8888 = u32;
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enum class AlphaType {
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Premultiplied,
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Unpremultiplied,
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};
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inline bool is_valid_alpha_type(u32 alpha_type)
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{
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switch (alpha_type) {
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case (u32)AlphaType::Premultiplied:
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case (u32)AlphaType::Unpremultiplied:
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return true;
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}
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return false;
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}
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struct HSV {
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double hue { 0 };
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double saturation { 0 };
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double value { 0 };
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};
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struct YUV {
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float y { 0 };
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float u { 0 };
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float v { 0 };
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};
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struct Oklab {
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float L { 0 };
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float a { 0 };
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float b { 0 };
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};
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class Color {
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public:
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enum class NamedColor {
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Transparent,
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Black,
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White,
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Red,
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Green,
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Cyan,
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Blue,
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Yellow,
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Magenta,
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DarkGray,
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MidGray,
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LightGray,
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WarmGray,
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DarkCyan,
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DarkGreen,
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DarkBlue,
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DarkRed,
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MidCyan,
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MidGreen,
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MidRed,
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MidBlue,
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MidMagenta,
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LightBlue,
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};
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using enum NamedColor;
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enum class BrandedColor {
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Indigo10,
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Indigo20,
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Indigo30,
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Indigo40,
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Indigo50,
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Indigo60,
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Indigo80,
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Indigo100,
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Indigo300,
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Indigo500,
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Indigo900,
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Violet10,
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Violet20,
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Violet30,
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Violet40,
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Violet50,
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Violet60,
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Violet80,
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Violet100,
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Violet300,
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Violet500,
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Violet900,
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SlateBlue10,
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SlateBlue20,
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SlateBlue30,
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SlateBlue40,
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SlateBlue50,
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SlateBlue60,
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SlateBlue80,
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SlateBlue100,
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SlateBlue300,
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SlateBlue500,
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SlateBlue900,
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Violet = Violet100,
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Indigo = Indigo100,
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SlateBlue = SlateBlue100,
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};
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constexpr Color() = default;
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constexpr Color(NamedColor);
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constexpr Color(u8 r, u8 g, u8 b)
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: m_value(0xff000000 | (r << 16) | (g << 8) | b)
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{
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}
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constexpr Color(u8 r, u8 g, u8 b, u8 a)
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: m_value((a << 24) | (r << 16) | (g << 8) | b)
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{
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}
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static constexpr Color branded_color(BrandedColor);
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static constexpr Color from_bgrx(unsigned bgrx) { return Color(bgrx | 0xff000000); }
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static constexpr Color from_bgra(unsigned bgra) { return Color(bgra); }
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static constexpr Color from_rgba(unsigned rgba)
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{
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unsigned bgra = (rgba & 0xff00ff00) | ((rgba & 0xff0000) >> 16) | ((rgba & 0xff) << 16);
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return Color::from_bgra(bgra);
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}
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static constexpr Color from_rgbx(unsigned rgbx) { return Color::from_rgba(rgbx | 0xff000000); }
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static constexpr Color from_yuv(YUV const& yuv) { return from_yuv(yuv.y, yuv.u, yuv.v); }
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static constexpr Color from_yuv(float y, float u, float v)
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{
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auto srgb = yuv_to_srgb({ y, u, v });
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return {
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static_cast<u8>(floorf(srgb[0] * 255.0f)),
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static_cast<u8>(floorf(srgb[1] * 255.0f)),
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static_cast<u8>(floorf(srgb[2] * 255.0f)),
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};
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}
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constexpr YUV to_yuv() const
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{
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auto yuv = srgb_to_yuv({ red() / 255.0f, green() / 255.0f, blue() / 255.0f });
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return { yuv[0], yuv[1], yuv[2] };
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}
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static constexpr Color from_hsl(float h_degrees, float s, float l) { return from_hsla(h_degrees, s, l, 1.0); }
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static constexpr Color from_hsla(float h_degrees, float s, float l, float a)
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{
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auto srgb = hsl_to_srgb({ h_degrees, clamp(s, 0.0f, 1.0f), clamp(l, 0.0f, 1.0f), a });
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u8 r_u8 = clamp(lroundf(srgb[0] * 255.0f), 0, 255);
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u8 g_u8 = clamp(lroundf(srgb[1] * 255.0f), 0, 255);
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u8 b_u8 = clamp(lroundf(srgb[2] * 255.0f), 0, 255);
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u8 a_u8 = clamp(lroundf(srgb.alpha() * 255.0f), 0, 255);
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return Color(r_u8, g_u8, b_u8, a_u8);
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}
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static Color from_a98rgb(float r, float g, float b, float alpha = 1.0f);
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static Color from_display_p3(float r, float g, float b, float alpha = 1.0f);
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static Color from_lab(float L, float a, float b, float alpha = 1.0f);
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static Color from_linear_display_p3(float r, float g, float b, float alpha = 1.0f);
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static Color from_linear_srgb(float r, float g, float b, float alpha = 1.0f);
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static Color from_pro_photo_rgb(float r, float g, float b, float alpha = 1.0f);
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static Color from_rec2020(float r, float g, float b, float alpha = 1.0f);
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static Color from_xyz50(float x, float y, float z, float alpha = 1.0f);
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static Color from_xyz65(float x, float y, float z, float alpha = 1.0f);
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// https://bottosson.github.io/posts/oklab/
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static constexpr Color from_oklab(float L, float a, float b, float alpha = 1.0f)
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{
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auto linear = oklab_to_linear_srgb({ L, a, b, alpha });
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return from_linear_srgb(linear[0], linear[1], linear[2], linear.alpha());
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}
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constexpr Oklab to_premultiplied_oklab()
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{
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auto oklab = to_oklab();
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return {
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oklab.L * alpha() / 255,
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oklab.a * alpha() / 255,
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oklab.b * alpha() / 255,
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};
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}
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// https://bottosson.github.io/posts/oklab/
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constexpr Oklab to_oklab()
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{
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auto linear = srgb_to_linear_srgb({ red() / 255.0f, green() / 255.0f, blue() / 255.0f });
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auto oklab = linear_srgb_to_oklab(linear);
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return { oklab[0], oklab[1], oklab[2] };
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}
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constexpr u8 red() const { return (m_value >> 16) & 0xff; }
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constexpr u8 green() const { return (m_value >> 8) & 0xff; }
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constexpr u8 blue() const { return m_value & 0xff; }
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constexpr u8 alpha() const { return (m_value >> 24) & 0xff; }
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constexpr void set_alpha(u8 value, AlphaType alpha_type = AlphaType::Unpremultiplied)
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{
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switch (alpha_type) {
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case AlphaType::Premultiplied:
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m_value = value << 24
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| (red() * value / 255) << 16
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| (green() * value / 255) << 8
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| blue() * value / 255;
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break;
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case AlphaType::Unpremultiplied:
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m_value = (m_value & 0x00ffffff) | value << 24;
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break;
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default:
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VERIFY_NOT_REACHED();
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}
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}
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constexpr void set_red(u8 value)
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{
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m_value &= 0xff00ffff;
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m_value |= value << 16;
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}
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constexpr void set_green(u8 value)
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{
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m_value &= 0xffff00ff;
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m_value |= value << 8;
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}
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constexpr void set_blue(u8 value)
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{
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m_value &= 0xffffff00;
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m_value |= value;
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}
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constexpr Color with_alpha(u8 alpha, AlphaType alpha_type = AlphaType::Unpremultiplied) const
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{
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Color color_with_alpha = Color(m_value);
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color_with_alpha.set_alpha(alpha, alpha_type);
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return color_with_alpha;
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}
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constexpr Color blend(Color source) const
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{
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if (alpha() == 0 || source.alpha() == 255)
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return source;
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if (source.alpha() == 0)
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return *this;
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int const d = 255 * (alpha() + source.alpha()) - alpha() * source.alpha();
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u8 r = (red() * alpha() * (255 - source.alpha()) + source.red() * 255 * source.alpha()) / d;
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u8 g = (green() * alpha() * (255 - source.alpha()) + source.green() * 255 * source.alpha()) / d;
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u8 b = (blue() * alpha() * (255 - source.alpha()) + source.blue() * 255 * source.alpha()) / d;
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u8 a = d / 255;
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return Color(r, g, b, a);
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}
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ALWAYS_INLINE Color mixed_with(Color other, float weight) const
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{
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if (alpha() == other.alpha() || with_alpha(0) == other.with_alpha(0))
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return interpolate(other, weight);
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// Fallback to slower, but more visually pleasing premultiplied alpha mix.
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// This is needed for linear-gradient()s in LibWeb.
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auto mixed_alpha = mix<float>(alpha(), other.alpha(), weight);
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auto premultiplied_mix_channel = [&](float channel, float other_channel, float weight) {
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return round_to<u8>(mix<float>(channel * alpha(), other_channel * other.alpha(), weight) / mixed_alpha);
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};
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return Gfx::Color {
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premultiplied_mix_channel(red(), other.red(), weight),
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premultiplied_mix_channel(green(), other.green(), weight),
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premultiplied_mix_channel(blue(), other.blue(), weight),
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round_to<u8>(mixed_alpha),
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};
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}
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ALWAYS_INLINE Color interpolate(Color other, float weight) const noexcept
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{
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return Gfx::Color {
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round_to<u8>(mix<float>(red(), other.red(), weight)),
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round_to<u8>(mix<float>(green(), other.green(), weight)),
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round_to<u8>(mix<float>(blue(), other.blue(), weight)),
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round_to<u8>(mix<float>(alpha(), other.alpha(), weight)),
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};
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}
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constexpr Color multiply(Color other) const
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{
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return Color(
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red() * other.red() / 255,
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green() * other.green() / 255,
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blue() * other.blue() / 255,
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alpha() * other.alpha() / 255);
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}
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constexpr float distance_squared_to(Color other) const
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{
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int delta_red = other.red() - red();
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int delta_green = other.green() - green();
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int delta_blue = other.blue() - blue();
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int delta_alpha = other.alpha() - alpha();
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auto rgb_distance = (delta_red * delta_red + delta_green * delta_green + delta_blue * delta_blue) / (3.0f * 255 * 255);
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return delta_alpha * delta_alpha / (2.0f * 255 * 255) + rgb_distance * alpha() * other.alpha() / (255 * 255);
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}
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constexpr u8 luminosity() const
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{
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return round_to<u8>(red() * 0.2126f + green() * 0.7152f + blue() * 0.0722f);
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}
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constexpr float contrast_ratio(Color other)
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{
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auto l1 = luminosity();
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auto l2 = other.luminosity();
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auto darkest = min(l1, l2) / 255.;
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auto brightest = max(l1, l2) / 255.;
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return (brightest + 0.05) / (darkest + 0.05);
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}
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constexpr Color to_grayscale() const
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{
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auto gray = luminosity();
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return Color(gray, gray, gray, alpha());
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}
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constexpr Color sepia(float amount = 1.0f) const
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{
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auto blend_factor = 1.0f - amount;
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auto r1 = 0.393f + 0.607f * blend_factor;
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auto r2 = 0.769f - 0.769f * blend_factor;
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auto r3 = 0.189f - 0.189f * blend_factor;
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auto g1 = 0.349f - 0.349f * blend_factor;
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auto g2 = 0.686f + 0.314f * blend_factor;
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auto g3 = 0.168f - 0.168f * blend_factor;
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auto b1 = 0.272f - 0.272f * blend_factor;
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auto b2 = 0.534f - 0.534f * blend_factor;
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auto b3 = 0.131f + 0.869f * blend_factor;
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auto r = red();
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auto g = green();
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auto b = blue();
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return Color(
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clamp(lroundf(r * r1 + g * r2 + b * r3), 0, 255),
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clamp(lroundf(r * g1 + g * g2 + b * g3), 0, 255),
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clamp(lroundf(r * b1 + g * b2 + b * b3), 0, 255),
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alpha());
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}
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constexpr Color with_opacity(float opacity) const
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{
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VERIFY(opacity >= 0 && opacity <= 1);
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return with_alpha(static_cast<u8>(round(alpha() * opacity)));
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}
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constexpr Color darkened(float amount = 0.5f) const
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{
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return Color(red() * amount, green() * amount, blue() * amount, alpha());
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}
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constexpr Color lightened(float amount = 1.2f) const
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{
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return Color(min(255, (int)((float)red() * amount)), min(255, (int)((float)green() * amount)), min(255, (int)((float)blue() * amount)), alpha());
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}
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Vector<Color> shades(u32 steps, float max = 1.f) const;
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Vector<Color> tints(u32 steps, float max = 1.f) const;
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constexpr Color saturated_to(float saturation) const
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{
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auto hsv = to_hsv();
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auto alpha = this->alpha();
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auto color = Color::from_hsv(hsv.hue, static_cast<double>(saturation), hsv.value);
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color.set_alpha(alpha);
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return color;
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}
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constexpr Color inverted() const
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{
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return Color(~red(), ~green(), ~blue(), alpha());
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}
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constexpr Color xored(Color other) const
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{
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return Color(((other.m_value ^ m_value) & 0x00ffffff) | (m_value & 0xff000000));
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}
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constexpr BGRA8888 value() const { return m_value; }
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constexpr bool operator==(Color other) const
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{
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return m_value == other.m_value;
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}
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enum class HTMLCompatibleSerialization {
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No,
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Yes,
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};
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[[nodiscard]] String to_string(HTMLCompatibleSerialization = HTMLCompatibleSerialization::No) const;
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String to_string_without_alpha() const;
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Utf16String to_utf16_string_without_alpha() const;
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void serialize_a_srgb_value(StringBuilder&) const;
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String serialize_a_srgb_value() const;
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ByteString to_byte_string() const;
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ByteString to_byte_string_without_alpha() const;
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static Optional<Color> from_string(StringView);
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static Optional<Color> from_utf16_string(Utf16View const&);
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static Optional<Color> from_named_css_color_string(StringView);
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constexpr HSV to_hsv() const
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{
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auto hsv = srgb_to_hsv({ red() / 255.0f, green() / 255.0f, blue() / 255.0f });
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VERIFY(hsv[0] >= 0.0f && hsv[0] < 360.0f);
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VERIFY(hsv[1] >= 0.0f && hsv[1] <= 1.0f);
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VERIFY(hsv[2] >= 0.0f && hsv[2] <= 1.0f);
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return { hsv[0], hsv[1], hsv[2] };
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}
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static constexpr Color from_hsv(double hue, double saturation, double value)
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{
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return from_hsv({ hue, saturation, value });
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}
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static constexpr Color from_hsv(HSV const& hsv)
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{
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VERIFY(hsv.hue >= 0.0 && hsv.hue < 360.0);
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VERIFY(hsv.saturation >= 0.0 && hsv.saturation <= 1.0);
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VERIFY(hsv.value >= 0.0 && hsv.value <= 1.0);
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auto srgb = hsv_to_srgb({ static_cast<float>(hsv.hue), static_cast<float>(hsv.saturation), static_cast<float>(hsv.value) });
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auto out_r = static_cast<u8>(round(srgb[0] * 255));
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auto out_g = static_cast<u8>(round(srgb[1] * 255));
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auto out_b = static_cast<u8>(round(srgb[2] * 255));
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return Color(out_r, out_g, out_b);
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}
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constexpr Color suggested_foreground_color() const
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{
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return luminosity() < 128 ? Color::White : Color::Black;
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}
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private:
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constexpr explicit Color(BGRA8888 argb)
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: m_value(argb)
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{
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}
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BGRA8888 m_value { 0 };
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};
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constexpr Color::Color(NamedColor named)
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{
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if (named == Transparent) {
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m_value = 0;
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return;
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}
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struct {
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u8 r;
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u8 g;
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u8 b;
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} rgb;
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switch (named) {
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case Black:
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rgb = { 0, 0, 0 };
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break;
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case White:
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rgb = { 255, 255, 255 };
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|
break;
|
|
case Red:
|
|
rgb = { 255, 0, 0 };
|
|
break;
|
|
case Green:
|
|
rgb = { 0, 255, 0 };
|
|
break;
|
|
case Cyan:
|
|
rgb = { 0, 255, 255 };
|
|
break;
|
|
case DarkCyan:
|
|
rgb = { 0, 127, 127 };
|
|
break;
|
|
case MidCyan:
|
|
rgb = { 0, 192, 192 };
|
|
break;
|
|
case Blue:
|
|
rgb = { 0, 0, 255 };
|
|
break;
|
|
case Yellow:
|
|
rgb = { 255, 255, 0 };
|
|
break;
|
|
case Magenta:
|
|
rgb = { 255, 0, 255 };
|
|
break;
|
|
case DarkGray:
|
|
rgb = { 64, 64, 64 };
|
|
break;
|
|
case MidGray:
|
|
rgb = { 127, 127, 127 };
|
|
break;
|
|
case LightGray:
|
|
rgb = { 192, 192, 192 };
|
|
break;
|
|
case MidGreen:
|
|
rgb = { 0, 192, 0 };
|
|
break;
|
|
case MidBlue:
|
|
rgb = { 0, 0, 192 };
|
|
break;
|
|
case MidRed:
|
|
rgb = { 192, 0, 0 };
|
|
break;
|
|
case MidMagenta:
|
|
rgb = { 192, 0, 192 };
|
|
break;
|
|
case DarkGreen:
|
|
rgb = { 0, 128, 0 };
|
|
break;
|
|
case DarkBlue:
|
|
rgb = { 0, 0, 128 };
|
|
break;
|
|
case DarkRed:
|
|
rgb = { 128, 0, 0 };
|
|
break;
|
|
case WarmGray:
|
|
rgb = { 212, 208, 200 };
|
|
break;
|
|
case LightBlue:
|
|
rgb = { 173, 216, 230 };
|
|
break;
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
break;
|
|
}
|
|
|
|
m_value = 0xff000000 | (rgb.r << 16) | (rgb.g << 8) | rgb.b;
|
|
}
|
|
|
|
constexpr Color Color::branded_color(BrandedColor color)
|
|
{
|
|
// clang-format off
|
|
switch (color) {
|
|
case BrandedColor::Indigo10: return from_bgrx(0xa5'a6'f2);
|
|
case BrandedColor::Indigo20: return from_bgrx(0x8a'88'eb);
|
|
case BrandedColor::Indigo30: return from_bgrx(0x68'51'd6);
|
|
case BrandedColor::Indigo40: return from_bgrx(0x55'3f'c4);
|
|
case BrandedColor::Indigo50: return from_bgrx(0x4d'37'b8);
|
|
case BrandedColor::Indigo60: return from_bgrx(0x3c'28'a1);
|
|
case BrandedColor::Indigo80: return from_bgrx(0x30'1f'82);
|
|
case BrandedColor::Indigo100: return from_bgrx(0x2a'13'73);
|
|
case BrandedColor::Indigo300: return from_bgrx(0x26'0f'73);
|
|
case BrandedColor::Indigo500: return from_bgrx(0x1d'0c'59);
|
|
case BrandedColor::Indigo900: return from_bgrx(0x19'0c'4a);
|
|
|
|
case BrandedColor::Violet10: return from_bgrx(0xe0'd4'ff);
|
|
case BrandedColor::Violet20: return from_bgrx(0xca'b5'ff);
|
|
case BrandedColor::Violet30: return from_bgrx(0xc3'ab'ff);
|
|
case BrandedColor::Violet40: return from_bgrx(0xb4'96'ff);
|
|
case BrandedColor::Violet50: return from_bgrx(0xab'8e'f5);
|
|
case BrandedColor::Violet60: return from_bgrx(0x9d'7c'f2);
|
|
case BrandedColor::Violet80: return from_bgrx(0x93'6f'ed);
|
|
case BrandedColor::Violet100: return from_bgrx(0x8a'64'e5);
|
|
case BrandedColor::Violet300: return from_bgrx(0x82'57'e6);
|
|
case BrandedColor::Violet500: return from_bgrx(0x7a'4c'e6);
|
|
case BrandedColor::Violet900: return from_bgrx(0x6a'39'db);
|
|
|
|
case BrandedColor::SlateBlue10: return from_bgrx(0xcb'e0'f7);
|
|
case BrandedColor::SlateBlue20: return from_bgrx(0xc1'd9'f5);
|
|
case BrandedColor::SlateBlue30: return from_bgrx(0xb6'd2'f2);
|
|
case BrandedColor::SlateBlue40: return from_bgrx(0xa8'c8'ed);
|
|
case BrandedColor::SlateBlue50: return from_bgrx(0x97'bc'e6);
|
|
case BrandedColor::SlateBlue60: return from_bgrx(0x86'ad'd9);
|
|
case BrandedColor::SlateBlue80: return from_bgrx(0x77'a1'd1);
|
|
case BrandedColor::SlateBlue100: return from_bgrx(0x6d'98'cc);
|
|
case BrandedColor::SlateBlue300: return from_bgrx(0x5c'8e'cc);
|
|
case BrandedColor::SlateBlue500: return from_bgrx(0x54'84'bf);
|
|
case BrandedColor::SlateBlue900: return from_bgrx(0x48'72'a3);
|
|
}
|
|
// clang-format on
|
|
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
}
|
|
|
|
using Gfx::Color;
|
|
|
|
namespace AK {
|
|
|
|
template<>
|
|
class Traits<Color> : public DefaultTraits<Color> {
|
|
public:
|
|
static unsigned hash(Color const& color)
|
|
{
|
|
return u32_hash(color.value());
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct Formatter<Gfx::Color> : public Formatter<StringView> {
|
|
ErrorOr<void> format(FormatBuilder&, Gfx::Color);
|
|
};
|
|
|
|
template<>
|
|
struct Formatter<Gfx::YUV> : public Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder&, Gfx::YUV);
|
|
};
|
|
|
|
template<>
|
|
struct Formatter<Gfx::HSV> : public Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder&, Gfx::HSV);
|
|
};
|
|
|
|
template<>
|
|
struct Formatter<Gfx::Oklab> : public Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder&, Gfx::Oklab);
|
|
};
|
|
|
|
}
|
|
|
|
namespace IPC {
|
|
|
|
template<>
|
|
ErrorOr<void> encode(Encoder&, Gfx::Color const&);
|
|
|
|
template<>
|
|
ErrorOr<Gfx::Color> decode(Decoder&);
|
|
|
|
}
|