mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-10 13:00:29 +03:00
a6a8ba80fc
This matches the rename of RGBA32 to ARGB32. It also makes more sense
when you see it used with 32-bit hexadecimal literals:
Before:
Color::from_rgba(0xaarrggbb)
After:
Color::from_argb(0xaarrggbb)
514 lines
13 KiB
C++
514 lines
13 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Assertions.h>
|
|
#include <AK/Format.h>
|
|
#include <AK/Forward.h>
|
|
#include <AK/SIMD.h>
|
|
#include <AK/StdLibExtras.h>
|
|
#include <LibIPC/Forward.h>
|
|
#include <math.h>
|
|
|
|
namespace Gfx {
|
|
|
|
enum class ColorRole;
|
|
typedef u32 ARGB32;
|
|
|
|
struct HSV {
|
|
double hue { 0 };
|
|
double saturation { 0 };
|
|
double value { 0 };
|
|
};
|
|
|
|
class Color {
|
|
public:
|
|
enum NamedColor {
|
|
Transparent,
|
|
Black,
|
|
White,
|
|
Red,
|
|
Green,
|
|
Cyan,
|
|
Blue,
|
|
Yellow,
|
|
Magenta,
|
|
DarkGray,
|
|
MidGray,
|
|
LightGray,
|
|
WarmGray,
|
|
DarkCyan,
|
|
DarkGreen,
|
|
DarkBlue,
|
|
DarkRed,
|
|
MidCyan,
|
|
MidGreen,
|
|
MidRed,
|
|
MidBlue,
|
|
MidMagenta,
|
|
};
|
|
|
|
constexpr Color() = default;
|
|
constexpr Color(NamedColor);
|
|
constexpr Color(u8 r, u8 g, u8 b)
|
|
: m_value(0xff000000 | (r << 16) | (g << 8) | b)
|
|
{
|
|
}
|
|
constexpr Color(u8 r, u8 g, u8 b, u8 a)
|
|
: m_value((a << 24) | (r << 16) | (g << 8) | b)
|
|
{
|
|
}
|
|
|
|
static constexpr Color from_rgb(unsigned rgb) { return Color(rgb | 0xff000000); }
|
|
static constexpr Color from_argb(unsigned argb) { return Color(argb); }
|
|
|
|
static constexpr Color from_cmyk(float c, float m, float y, float k)
|
|
{
|
|
auto r = static_cast<u8>(255.0f * (1.0f - c) * (1.0f - k));
|
|
auto g = static_cast<u8>(255.0f * (1.0f - m) * (1.0f - k));
|
|
auto b = static_cast<u8>(255.0f * (1.0f - y) * (1.0f - k));
|
|
|
|
return Color(r, g, b);
|
|
}
|
|
|
|
static constexpr Color from_hsl(double h_degrees, double s, double l) { return from_hsla(h_degrees, s, l, 1.0); }
|
|
static constexpr Color from_hsla(double h_degrees, double s, double l, double a)
|
|
{
|
|
// Algorithm from https://www.w3.org/TR/css-color-3/#hsl-color
|
|
double h = clamp(h_degrees / 360.0, 0.0, 1.0);
|
|
s = clamp(s, 0.0, 1.0);
|
|
l = clamp(l, 0.0, 1.0);
|
|
a = clamp(a, 0.0, 1.0);
|
|
|
|
// HOW TO RETURN hue.to.rgb(m1, m2, h):
|
|
auto hue_to_rgb = [](double m1, double m2, double h) -> double {
|
|
// IF h<0: PUT h+1 IN h
|
|
if (h < 0.0)
|
|
h = h + 1.0;
|
|
// IF h>1: PUT h-1 IN h
|
|
if (h > 1.0)
|
|
h = h - 1.0;
|
|
// IF h*6<1: RETURN m1+(m2-m1)*h*6
|
|
if (h * 6.0 < 1.0)
|
|
return m1 + (m2 - m1) * h * 6.0;
|
|
// IF h*2<1: RETURN m2
|
|
if (h * 2.0 < 1.0)
|
|
return m2;
|
|
// IF h*3<2: RETURN m1+(m2-m1)*(2/3-h)*6
|
|
if (h * 3.0 < 2.0)
|
|
return m1 + (m2 - m1) * (2.0 / 3.0 - h) * 6.0;
|
|
// RETURN m1
|
|
return m1;
|
|
};
|
|
|
|
// SELECT:
|
|
// l<=0.5: PUT l*(s+1) IN m2
|
|
double m2;
|
|
if (l <= 0.5)
|
|
m2 = l * (s + 1.0);
|
|
// ELSE: PUT l+s-l*s IN m2
|
|
else
|
|
m2 = l + s - l * s;
|
|
// PUT l*2-m2 IN m1
|
|
double m1 = l * 2.0 - m2;
|
|
// PUT hue.to.rgb(m1, m2, h+1/3) IN r
|
|
double r = hue_to_rgb(m1, m2, h + 1.0 / 3.0);
|
|
// PUT hue.to.rgb(m1, m2, h ) IN g
|
|
double g = hue_to_rgb(m1, m2, h);
|
|
// PUT hue.to.rgb(m1, m2, h-1/3) IN b
|
|
double b = hue_to_rgb(m1, m2, h - 1.0 / 3.0);
|
|
// RETURN (r, g, b)
|
|
u8 r_u8 = clamp(lroundf(r * 255.0), 0, 255);
|
|
u8 g_u8 = clamp(lroundf(g * 255.0), 0, 255);
|
|
u8 b_u8 = clamp(lroundf(b * 255.0), 0, 255);
|
|
u8 a_u8 = clamp(lroundf(a * 255.0), 0, 255);
|
|
return Color(r_u8, g_u8, b_u8, a_u8);
|
|
}
|
|
|
|
constexpr u8 red() const { return (m_value >> 16) & 0xff; }
|
|
constexpr u8 green() const { return (m_value >> 8) & 0xff; }
|
|
constexpr u8 blue() const { return m_value & 0xff; }
|
|
constexpr u8 alpha() const { return (m_value >> 24) & 0xff; }
|
|
|
|
void set_alpha(u8 value)
|
|
{
|
|
m_value &= 0x00ffffff;
|
|
m_value |= value << 24;
|
|
}
|
|
|
|
constexpr void set_red(u8 value)
|
|
{
|
|
m_value &= 0xff00ffff;
|
|
m_value |= value << 16;
|
|
}
|
|
|
|
constexpr void set_green(u8 value)
|
|
{
|
|
m_value &= 0xffff00ff;
|
|
m_value |= value << 8;
|
|
}
|
|
|
|
constexpr void set_blue(u8 value)
|
|
{
|
|
m_value &= 0xffffff00;
|
|
m_value |= value;
|
|
}
|
|
|
|
constexpr Color with_alpha(u8 alpha) const
|
|
{
|
|
return Color((m_value & 0x00ffffff) | alpha << 24);
|
|
}
|
|
|
|
constexpr Color blend(Color source) const
|
|
{
|
|
if (!alpha() || source.alpha() == 255)
|
|
return source;
|
|
|
|
if (!source.alpha())
|
|
return *this;
|
|
|
|
#ifdef __SSE__
|
|
using AK::SIMD::i32x4;
|
|
|
|
const i32x4 color = {
|
|
red(),
|
|
green(),
|
|
blue()
|
|
};
|
|
const i32x4 source_color = {
|
|
source.red(),
|
|
source.green(),
|
|
source.blue()
|
|
};
|
|
|
|
const int d = 255 * (alpha() + source.alpha()) - alpha() * source.alpha();
|
|
const i32x4 out = (color * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source_color) / d;
|
|
return Color(out[0], out[1], out[2], d / 255);
|
|
#else
|
|
int d = 255 * (alpha() + source.alpha()) - alpha() * source.alpha();
|
|
u8 r = (red() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.red()) / d;
|
|
u8 g = (green() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.green()) / d;
|
|
u8 b = (blue() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.blue()) / d;
|
|
u8 a = d / 255;
|
|
return Color(r, g, b, a);
|
|
#endif
|
|
}
|
|
|
|
Color interpolate(Color const& other, float weight) const noexcept
|
|
{
|
|
u8 r = red() + roundf(static_cast<float>(other.red() - red()) * weight);
|
|
u8 g = green() + roundf(static_cast<float>(other.green() - green()) * weight);
|
|
u8 b = blue() + roundf(static_cast<float>(other.blue() - blue()) * weight);
|
|
u8 a = alpha() + roundf(static_cast<float>(other.alpha() - alpha()) * weight);
|
|
return Color(r, g, b, a);
|
|
}
|
|
|
|
constexpr Color multiply(Color const& other) const
|
|
{
|
|
return Color(
|
|
red() * other.red() / 255,
|
|
green() * other.green() / 255,
|
|
blue() * other.blue() / 255,
|
|
alpha() * other.alpha() / 255);
|
|
}
|
|
|
|
constexpr u8 luminosity() const
|
|
{
|
|
return (red() * 0.2126f + green() * 0.7152f + blue() * 0.0722f);
|
|
}
|
|
|
|
constexpr Color to_grayscale() const
|
|
{
|
|
auto gray = luminosity();
|
|
return Color(gray, gray, gray, alpha());
|
|
}
|
|
|
|
constexpr Color sepia(float amount = 1.0f) const
|
|
{
|
|
auto blend_factor = 1.0f - amount;
|
|
|
|
auto r1 = 0.393f + 0.607f * blend_factor;
|
|
auto r2 = 0.769f - 0.769f * blend_factor;
|
|
auto r3 = 0.189f - 0.189f * blend_factor;
|
|
|
|
auto g1 = 0.349f - 0.349f * blend_factor;
|
|
auto g2 = 0.686f + 0.314f * blend_factor;
|
|
auto g3 = 0.168f - 0.168f * blend_factor;
|
|
|
|
auto b1 = 0.272f - 0.272f * blend_factor;
|
|
auto b2 = 0.534f - 0.534f * blend_factor;
|
|
auto b3 = 0.131f + 0.869f * blend_factor;
|
|
|
|
auto r = red();
|
|
auto g = green();
|
|
auto b = blue();
|
|
|
|
return Color(
|
|
clamp(lroundf(r * r1 + g * r2 + b * r3), 0, 255),
|
|
clamp(lroundf(r * g1 + g * g2 + b * g3), 0, 255),
|
|
clamp(lroundf(r * b1 + g * b2 + b * b3), 0, 255),
|
|
alpha());
|
|
}
|
|
|
|
constexpr Color darkened(float amount = 0.5f) const
|
|
{
|
|
return Color(red() * amount, green() * amount, blue() * amount, alpha());
|
|
}
|
|
|
|
constexpr Color lightened(float amount = 1.2f) const
|
|
{
|
|
return Color(min(255, (int)((float)red() * amount)), min(255, (int)((float)green() * amount)), min(255, (int)((float)blue() * amount)), alpha());
|
|
}
|
|
|
|
Vector<Color> shades(u32 steps, float max = 1.f) const;
|
|
Vector<Color> tints(u32 steps, float max = 1.f) const;
|
|
|
|
constexpr Color inverted() const
|
|
{
|
|
return Color(~red(), ~green(), ~blue(), alpha());
|
|
}
|
|
|
|
constexpr Color xored(Color const& other) const
|
|
{
|
|
return Color(((other.m_value ^ m_value) & 0x00ffffff) | (m_value & 0xff000000));
|
|
}
|
|
|
|
constexpr ARGB32 value() const { return m_value; }
|
|
|
|
constexpr bool operator==(Color const& other) const
|
|
{
|
|
return m_value == other.m_value;
|
|
}
|
|
|
|
constexpr bool operator!=(Color const& other) const
|
|
{
|
|
return m_value != other.m_value;
|
|
}
|
|
|
|
String to_string() const;
|
|
String to_string_without_alpha() const;
|
|
static Optional<Color> from_string(StringView);
|
|
|
|
constexpr HSV to_hsv() const
|
|
{
|
|
HSV hsv;
|
|
double r = static_cast<double>(red()) / 255.0;
|
|
double g = static_cast<double>(green()) / 255.0;
|
|
double b = static_cast<double>(blue()) / 255.0;
|
|
double max = AK::max(AK::max(r, g), b);
|
|
double min = AK::min(AK::min(r, g), b);
|
|
double chroma = max - min;
|
|
|
|
if (!chroma)
|
|
hsv.hue = 0.0;
|
|
else if (max == r)
|
|
hsv.hue = (60.0 * ((g - b) / chroma)) + 360.0;
|
|
else if (max == g)
|
|
hsv.hue = (60.0 * ((b - r) / chroma)) + 120.0;
|
|
else
|
|
hsv.hue = (60.0 * ((r - g) / chroma)) + 240.0;
|
|
|
|
if (hsv.hue >= 360.0)
|
|
hsv.hue -= 360.0;
|
|
|
|
if (!max)
|
|
hsv.saturation = 0;
|
|
else
|
|
hsv.saturation = chroma / max;
|
|
|
|
hsv.value = max;
|
|
|
|
VERIFY(hsv.hue >= 0.0 && hsv.hue < 360.0);
|
|
VERIFY(hsv.saturation >= 0.0 && hsv.saturation <= 1.0);
|
|
VERIFY(hsv.value >= 0.0 && hsv.value <= 1.0);
|
|
|
|
return hsv;
|
|
}
|
|
|
|
static constexpr Color from_hsv(double hue, double saturation, double value)
|
|
{
|
|
return from_hsv({ hue, saturation, value });
|
|
}
|
|
|
|
static constexpr Color from_hsv(HSV const& hsv)
|
|
{
|
|
VERIFY(hsv.hue >= 0.0 && hsv.hue < 360.0);
|
|
VERIFY(hsv.saturation >= 0.0 && hsv.saturation <= 1.0);
|
|
VERIFY(hsv.value >= 0.0 && hsv.value <= 1.0);
|
|
|
|
double hue = hsv.hue;
|
|
double saturation = hsv.saturation;
|
|
double value = hsv.value;
|
|
|
|
int high = static_cast<int>(hue / 60.0) % 6;
|
|
double f = (hue / 60.0) - high;
|
|
double c1 = value * (1.0 - saturation);
|
|
double c2 = value * (1.0 - saturation * f);
|
|
double c3 = value * (1.0 - saturation * (1.0 - f));
|
|
|
|
double r = 0;
|
|
double g = 0;
|
|
double b = 0;
|
|
|
|
switch (high) {
|
|
case 0:
|
|
r = value;
|
|
g = c3;
|
|
b = c1;
|
|
break;
|
|
case 1:
|
|
r = c2;
|
|
g = value;
|
|
b = c1;
|
|
break;
|
|
case 2:
|
|
r = c1;
|
|
g = value;
|
|
b = c3;
|
|
break;
|
|
case 3:
|
|
r = c1;
|
|
g = c2;
|
|
b = value;
|
|
break;
|
|
case 4:
|
|
r = c3;
|
|
g = c1;
|
|
b = value;
|
|
break;
|
|
case 5:
|
|
r = value;
|
|
g = c1;
|
|
b = c2;
|
|
break;
|
|
}
|
|
|
|
u8 out_r = (u8)(r * 255);
|
|
u8 out_g = (u8)(g * 255);
|
|
u8 out_b = (u8)(b * 255);
|
|
return Color(out_r, out_g, out_b);
|
|
}
|
|
|
|
constexpr Color suggested_foreground_color() const
|
|
{
|
|
return luminosity() < 128 ? Color::White : Color::Black;
|
|
}
|
|
|
|
private:
|
|
constexpr explicit Color(ARGB32 rgba)
|
|
: m_value(rgba)
|
|
{
|
|
}
|
|
|
|
ARGB32 m_value { 0 };
|
|
};
|
|
|
|
constexpr Color::Color(NamedColor named)
|
|
{
|
|
if (named == Transparent) {
|
|
m_value = 0;
|
|
return;
|
|
}
|
|
|
|
struct {
|
|
u8 r;
|
|
u8 g;
|
|
u8 b;
|
|
} rgb;
|
|
|
|
switch (named) {
|
|
case Black:
|
|
rgb = { 0, 0, 0 };
|
|
break;
|
|
case White:
|
|
rgb = { 255, 255, 255 };
|
|
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;
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
break;
|
|
}
|
|
|
|
m_value = 0xff000000 | (rgb.r << 16) | (rgb.g << 8) | rgb.b;
|
|
}
|
|
|
|
}
|
|
|
|
using Gfx::Color;
|
|
|
|
namespace AK {
|
|
|
|
template<>
|
|
struct Formatter<Gfx::Color> : public Formatter<StringView> {
|
|
ErrorOr<void> format(FormatBuilder&, Gfx::Color const&);
|
|
};
|
|
|
|
}
|
|
|
|
namespace IPC {
|
|
|
|
bool encode(Encoder&, Gfx::Color const&);
|
|
ErrorOr<void> decode(Decoder&, Gfx::Color&);
|
|
|
|
}
|