v/vlib/gx/color.v

module gx

pub const (
	blue   = Color { r:   0, g:   0, b: 255 }
	red    = Color { r: 255, g:   0, b:   0 }
	green  = Color { r:   0, g: 255, b:   0 }
	yellow = Color { r: 255, g: 255, b:   0 }

	orange = Color { r: 255, g: 165, b:   0 }
	purple = Color { r: 128, g:   0, b: 128 }

	black  = Color { r:   0, g:   0, b:   0 }
	gray   = Color { r: 128, g: 128, b: 128 }
	indigo = Color { r:  75, g:   0, b: 130 }
	pink   = Color { r: 255, g: 192, b: 203 }
	violet = Color { r: 238, g: 130, b: 238 }
	white  = Color { r: 255, g: 255, b: 255 }

	dark_blue   = Color { r:   0, g:   0, b: 139 }
	dark_gray   = Color { r: 169, g: 169, b: 169 }
	dark_green  = Color { r:   0, g: 100, b:   0 }
	dark_red    = Color { r: 139, g:   0, b:   0 }
	light_blue  = Color { r: 173, g: 216, b: 230 }
	light_gray  = Color { r: 211, g: 211, b: 211 }
	light_green = Color { r: 144, g: 238, b: 144 }
	light_red   = Color { r: 255, g: 204, b: 203 }
)

// Color represents a 32 bit color value in sRGB format
pub struct Color {
pub mut:
	r byte
	g byte
	b byte
	a byte = 255
}

// hex takes in a 32 bit integer and splits it into 4 byte values
pub fn hex(color int) Color {
	return Color {
		r: byte((color >> 24) & 0xFF),
		g: byte((color >> 16) & 0xFF),
		b: byte((color >>  8) & 0xFF),
		a: byte((color      ) & 0xFF)
	}
}

pub fn rgb(r, g, b byte) Color {
	return Color{
		r: r,
		g: g,
		b: b
	}
}

pub fn rgba(r, g, b, a byte) Color {
	return Color{
		r: r,
		g: g,
		b: b,
		a: a
	}
}

pub fn (c Color) + (c2 Color) Color {
	return Color {
		r: c.r + c2.r,
		g: c.g + c2.g,
		b: c.b + c2.b,
		a: c.b + c2.a
	}
}

pub fn (c Color) - (c2 Color) Color {
	return Color {
		r: c.r - c2.r,
		g: c.g - c2.g,
		b: c.b - c2.b,
		a: c.b - c2.a
	}
}

pub fn (c Color) * (c2 Color) Color {
	return Color {
		r: c.r * c2.r,
		g: c.g * c2.g,
		b: c.b * c2.b,
		a: c.b * c2.a
	}
}

pub fn (c Color) / (c2 Color) Color {
	return Color {
		r: c.r / c2.r,
		g: c.g / c2.g,
		b: c.b / c2.b,
		a: c.b / c2.a
	}
}

pub fn (c Color) eq(c2 Color) bool {
	return c.r == c2.r && c.g == c2.g && c.b == c2.b && c.a == c2.a
}

pub fn (c Color) str() string {
	return 'Color{$c.r, $c.g, $c.b, $c.a}'
}