Method applyBackgroundOption

options/parser/apply.go:291–331

(ctx context.Context, o *options.Options, args []string)

}

func (p *Parser) applyBackgroundOption(ctx context.Context, o *options.Options, args []string) error {
	switch len(args) {
	case 1:
		if len(args[0]) == 0 {
			o.Delete(keys.Background)
			return nil
		}

		if err := p.parseHexRGBColor(ctx, o, keys.Background, args[0]); err != nil {
			return err
		}

	case 3:
		var c color.RGB

		if r, err := strconv.ParseUint(args[0], 10, 8); err == nil && r <= 255 {
			c.R = uint8(r)
		} else {
			return newInvalidArgumentError(ctx, keys.Background+".R", args[0], "number in range 0-255")
		}

		if g, err := strconv.ParseUint(args[1], 10, 8); err == nil && g <= 255 {
			c.G = uint8(g)
		} else {
			return newInvalidArgumentError(ctx, keys.Background+".G", args[1], "number in range 0-255")
		}

		if b, err := strconv.ParseUint(args[2], 10, 8); err == nil && b <= 255 {
			c.B = uint8(b)
		} else {
			return newInvalidArgumentError(ctx, keys.Background+".B", args[2], "number in range 0-255")
		}

		o.Set(keys.Background, c)

	default:
		return newInvalidArgsError(ctx, keys.Background, args)
	}

	return nil
}

func (p *Parser) applyBlurOption(ctx context.Context, o *options.Options, args []string) error {
	return p.parsePositiveFloat(ctx, o, keys.Blur, args...)