Method parseOpacityFloat

options/parser/parse.go:203–221

parseOpacityFloat parses an opacity float option value (0-1)

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

// parseOpacityFloat parses an opacity float option value (0-1)
func (p *Parser) parseOpacityFloat(
	ctx context.Context,
	o *options.Options,
	key string,
	args ...string,
) error {
	if err := p.ensureMaxArgs(ctx, key, args, 1); err != nil {
		return err
	}

	f, err := strconv.ParseFloat(args[0], 64)
	if err != nil || f < 0 || f > 1 {
		return newInvalidArgumentError(ctx, key, args[0], "number in range 0-1")
	}

	o.Set(key, f)

	return nil
}

// parseResolution parses a resolution option value in megapixels and stores it as pixels
func (p *Parser) parseResolution(