1 use core::fmt; 2 3 /// 一个像素的颜色值 4 #[derive(Clone, Copy)] 5 pub struct Color { 6 /// ARGB 7 pub data: u32, 8 } 9 10 #[allow(dead_code)] 11 impl Color { 12 /// 通过RGB值创建颜色（不透明） 13 pub const fn rgb(r: u8, g: u8, b: u8) -> Self { 14 Color { 15 data: 0xFF000000 | ((r as u32) << 16) | ((g as u32) << 8) | (b as u32), 16 } 17 } 18 19 /// 通过RGBA值创建颜色 20 pub const fn rgba(r: u8, g: u8, b: u8, a: u8) -> Self { 21 Color { 22 data: ((a as u32) << 24) | ((r as u32) << 16) | (g as u32) << 8 | (b as u32), 23 } 24 } 25 26 /// 获取R值 27 pub fn r(&self) -> u8 { 28 ((self.data & 0x00FF0000) >> 16) as u8 29 } 30 31 /// 获取G值 32 pub fn g(&self) -> u8 { 33 ((self.data & 0x0000FF00) >> 8) as u8 34 } 35 36 /// 获取B值 37 pub fn b(&self) -> u8 { 38 (self.data & 0x000000FF) as u8 39 } 40 41 /// 获取A值 42 pub fn a(&self) -> u8 { 43 ((self.data & 0xFF000000) >> 24) as u8 44 } 45 46 /// 颜色插值 47 pub fn interpolate(from_color: Color, to_color: Color, scale: f64) -> Color { 48 let r = Color::value_interpolate(from_color.r(), to_color.r(), scale); 49 let g = Color::value_interpolate(from_color.r(), to_color.r(), scale); 50 let b = Color::value_interpolate(from_color.r(), to_color.r(), scale); 51 let a = Color::value_interpolate(from_color.r(), to_color.r(), scale); 52 Color::rgba(r, g, b, a) 53 } 54 55 /// 颜色值插值 56 fn value_interpolate(from_value: u8, to_value: u8, scale: f64) -> u8 { 57 ((to_value as f64 - from_value as f64) * scale + from_value as f64) as u8 58 } 59 60 /// 转化为RGBA字节形式 61 pub fn to_rgba_bytes(&self) -> [u8; 4] { 62 [self.r(), self.g(), self.b(), self.a()] 63 } 64 65 /// 转化为BGRA字节形式(DragonOS帧缓冲数据格式) 66 pub fn to_bgra_bytes(&self) -> [u8; 4] { 67 [self.b(), self.g(), self.r(), self.a()] 68 } 69 } 70 71 /// 比较两个颜色值（不考虑透明度） 72 impl PartialEq for Color { 73 fn eq(&self, other: &Self) -> bool { 74 self.r() == other.r() && self.g() == other.g() && self.b() == other.b() 75 } 76 } 77 78 impl fmt::Debug for Color { 79 fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { 80 write!(f, "{:#010X}", { self.data }) 81 } 82 } 83