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https://github.com/LadybirdBrowser/ladybird.git
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5d180d1f99
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
428 lines
10 KiB
C++
428 lines
10 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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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/SIMD.h>
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#include <AK/StdLibExtras.h>
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#include <LibIPC/Forward.h>
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namespace Gfx {
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enum class ColorRole;
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typedef u32 RGBA32;
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constexpr u32 make_rgb(u8 r, u8 g, u8 b)
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{
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return ((r << 16) | (g << 8) | b);
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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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class Color {
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public:
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enum 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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};
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constexpr Color() { }
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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 from_rgb(unsigned rgb) { return Color(rgb | 0xff000000); }
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static constexpr Color from_rgba(unsigned rgba) { return Color(rgba); }
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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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void set_alpha(u8 value)
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{
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m_value &= 0x00ffffff;
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m_value |= value << 24;
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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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Color with_alpha(u8 alpha) const
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{
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return Color((m_value & 0x00ffffff) | alpha << 24);
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}
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Color blend(Color source) const
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{
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if (!alpha() || source.alpha() == 255)
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return source;
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if (!source.alpha())
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return *this;
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#ifdef __SSE__
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using AK::SIMD::i32x4;
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const i32x4 color = {
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red(),
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green(),
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blue()
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};
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const i32x4 source_color = {
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source.red(),
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source.green(),
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source.blue()
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};
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const int d = 255 * (alpha() + source.alpha()) - alpha() * source.alpha();
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const i32x4 out = (color * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source_color) / d;
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return Color(out[0], out[1], out[2], d / 255);
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#else
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int d = 255 * (alpha() + source.alpha()) - alpha() * source.alpha();
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u8 r = (red() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.red()) / d;
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u8 g = (green() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.green()) / d;
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u8 b = (blue() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.blue()) / d;
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u8 a = d / 255;
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return Color(r, g, b, a);
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#endif
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}
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Color multiply(const 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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Color to_grayscale() const
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{
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int gray = (red() + green() + blue()) / 3;
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return Color(gray, gray, gray, alpha());
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}
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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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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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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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Color xored(const 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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RGBA32 value() const { return m_value; }
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bool operator==(const 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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bool operator!=(const 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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String to_string() const;
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String to_string_without_alpha() const;
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static Optional<Color> from_string(const StringView&);
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HSV to_hsv() const
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{
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HSV hsv;
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double r = static_cast<double>(red()) / 255.0;
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double g = static_cast<double>(green()) / 255.0;
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double b = static_cast<double>(blue()) / 255.0;
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double max = AK::max(AK::max(r, g), b);
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double min = AK::min(AK::min(r, g), b);
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double chroma = max - min;
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if (!chroma)
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hsv.hue = 0.0;
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else if (max == r)
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hsv.hue = (60.0 * ((g - b) / chroma)) + 360.0;
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else if (max == g)
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hsv.hue = (60.0 * ((b - r) / chroma)) + 120.0;
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else
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hsv.hue = (60.0 * ((r - g) / chroma)) + 240.0;
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if (hsv.hue >= 360.0)
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hsv.hue -= 360.0;
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if (!max)
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hsv.saturation = 0;
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else
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hsv.saturation = chroma / max;
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hsv.value = max;
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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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return hsv;
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}
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static 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 Color from_hsv(const HSV& 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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double hue = hsv.hue;
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double saturation = hsv.saturation;
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double value = hsv.value;
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int high = static_cast<int>(hue / 60.0) % 6;
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double f = (hue / 60.0) - high;
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double c1 = value * (1.0 - saturation);
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double c2 = value * (1.0 - saturation * f);
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double c3 = value * (1.0 - saturation * (1.0 - f));
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double r = 0;
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double g = 0;
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double b = 0;
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switch (high) {
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case 0:
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r = value;
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g = c3;
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b = c1;
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break;
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case 1:
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r = c2;
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g = value;
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b = c1;
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break;
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case 2:
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r = c1;
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g = value;
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b = c3;
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break;
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case 3:
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r = c1;
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g = c2;
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b = value;
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break;
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case 4:
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r = c3;
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g = c1;
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b = value;
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break;
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case 5:
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r = value;
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g = c1;
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b = c2;
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break;
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}
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u8 out_r = (u8)(r * 255);
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u8 out_g = (u8)(g * 255);
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u8 out_b = (u8)(b * 255);
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return Color(out_r, out_g, out_b);
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}
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private:
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constexpr explicit Color(RGBA32 rgba)
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: m_value(rgba)
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{
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}
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RGBA32 m_value { 0 };
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};
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inline 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;
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case Red:
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rgb = { 255, 0, 0 };
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break;
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case Green:
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rgb = { 0, 255, 0 };
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break;
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case Cyan:
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rgb = { 0, 255, 255 };
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break;
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case DarkCyan:
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rgb = { 0, 127, 127 };
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break;
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case MidCyan:
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rgb = { 0, 192, 192 };
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break;
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case Blue:
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rgb = { 0, 0, 255 };
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break;
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case Yellow:
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rgb = { 255, 255, 0 };
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break;
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case Magenta:
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rgb = { 255, 0, 255 };
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break;
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case DarkGray:
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rgb = { 64, 64, 64 };
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break;
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case MidGray:
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rgb = { 127, 127, 127 };
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break;
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case LightGray:
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rgb = { 192, 192, 192 };
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break;
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case MidGreen:
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rgb = { 0, 192, 0 };
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break;
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case MidBlue:
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rgb = { 0, 0, 192 };
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break;
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case MidRed:
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rgb = { 192, 0, 0 };
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break;
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case MidMagenta:
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rgb = { 192, 0, 192 };
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break;
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case DarkGreen:
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rgb = { 0, 128, 0 };
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break;
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case DarkBlue:
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rgb = { 0, 0, 128 };
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break;
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case DarkRed:
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rgb = { 128, 0, 0 };
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break;
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case WarmGray:
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rgb = { 212, 208, 200 };
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break;
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default:
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VERIFY_NOT_REACHED();
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break;
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}
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m_value = 0xff000000 | (rgb.r << 16) | (rgb.g << 8) | rgb.b;
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}
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const LogStream& operator<<(const LogStream&, Color);
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}
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using Gfx::Color;
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namespace AK {
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template<>
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struct Formatter<Gfx::Color> : public Formatter<StringView> {
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void format(FormatBuilder& builder, const Gfx::Color& value);
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};
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}
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namespace IPC {
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bool encode(Encoder&, const Gfx::Color&);
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bool decode(Decoder&, Gfx::Color&);
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}
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